/* ============================================= */
/* Global Variables & Reset                       */
/* ============================================= */
:root {
    --bg-main: #f4f7fa;
    --bg-surface: #ffffff;
    --border-color: #e9ecef;
    --header-bg: #f8f9fa;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-danger: #dc3545;

    /* Category side-bar colors */
    --side-color-mandatory: #343a40;
    --side-color-choice: #fd7e14;
    --side-color-lab: #0d6efd;
    --side-color-spirit: #6c757d;
    --side-color-seminar: #ec4899;
    --side-color-workshop: #14b8a6;
    --side-color-project: #6366f1;
    --side-color-english: #ef4444;
    --side-color-other: #9ca3af;

    /* Category badge backgrounds */
    --cat-mandatory-bg: #f1f3f5;
    --cat-choice-bg: #fff8f0;
    --cat-lab-bg: #f0f6ff;
    --cat-spirit-bg: #f8f9fa;
    --cat-seminar-bg: #fdf2f8;
    --cat-workshop-bg: #f0fdfa;
    --cat-project-bg: #eef2ff;
    --cat-english-bg: #fef2f2;
    --cat-other-bg: #f9fafb;

    --border-light: #ddd;
    --border-medium: #dee2e6;
    --primary-color: #007bff;
    --primary-light: rgba(0, 123, 255, 0.25);
    --success-color: #28a745;
    --success-bg-light: #eaf6ec;
    --danger-color: #ef4444;
    --icon-color: #9ca3af;

    --progress-done-bg: #10b981;
    --progress-planned-bg: #a7f3d0;
    --progress-track-bg: #f0f0f0;

    /* Requirement card colors */
    --card-purple-bg: #f3e8ff;
    --card-purple-border: #c084fc;
    --card-purple-fill: #a855f7;
    --card-green-bg: #dcfce7;
    --card-green-border: #4ade80;
    --card-green-fill: #22c55e;
    --card-red-bg: #fee2e2;
    --card-red-border: #f87171;
    --card-red-fill: var(--danger-color);
    --card-orange-bg: #ffedd5;
    --card-orange-border: #fb923c;
    --card-orange-fill: #f97316;
    --card-blue-bg: #dbeafe;
    --card-blue-border: #60a5fa;
    --card-blue-fill: #3b82f6;
    --card-yellow-bg: #fef9c3;
    --card-yellow-border: #facc15;
    --card-yellow-fill: #eab308;
    --card-pink-bg: #fdf2f8;
    --card-pink-border: #f472b6;
    --card-pink-fill: #ec4899;
    --card-teal-bg: #f0fdfa;
    --card-teal-border: #2dd4bf;
    --card-teal-fill: #14b8a6;
    --card-indigo-bg: #eef2ff;
    --card-indigo-border: #818cf8;
    --card-indigo-fill: #6366f1;
    --card-gray-bg: #f9fafb;
    --card-gray-border: #d1d5db;
    --card-gray-fill: #6b7280;

    --header-height: 64px;
    --mode-bar-height: 48px;
    --font-family: 'Heebo', sans-serif;
    --grade-good: #22c55e;
    --grade-bad: #ef4444;
    --grade-mid: #f59e0b;
    --simulation-color: #8b5cf6;
}

html { scroll-behavior: smooth; }
*, *::before, *::after { box-sizing: border-box; }

body {
    font-family: var(--font-family);
    background: var(--bg-main);
    direction: rtl;
    margin: 0;
    padding-top: var(--header-height);
}
/* ===== Site Header ===== */
.site-header {
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-medium);
    height: var(--header-height);
    position: fixed;
    top: 0; right: 0; left: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    transition: background-color 0.3s;
}

body.simulation-mode .site-header {
    background-color: #f5f0ff;
    border-bottom-color: var(--simulation-color);
}

.header-container {
    width: 100%;
    max-width: 1800px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: max-content 1fr max-content;
    align-items: center;
    gap: 20px;
}

.logo {
    display: flex; align-items: center; gap: 10px;
    font-size: 20px; font-weight: 700;
    color: var(--text-primary); text-decoration: none;
}

.header-actions {
    display: flex; align-items: center; gap: 12px;
}

.header-action-btn {
    display: flex; align-items: center; gap: 8px;
    background-color: #f0f0f0; color: var(--text-secondary);
    padding: 8px 16px; border-radius: 50px;
    text-decoration: none; font-size: 14px; font-weight: 500;
    transition: background-color 0.2s, color 0.2s;
    border: none; cursor: pointer; font-family: inherit;
}

.header-action-btn:hover { background-color: #e0e0e0; color: var(--text-primary); }
.header-action-btn svg { color: var(--text-primary); }
.header-action-btn.active { background-color: var(--simulation-color); color: white; }
.header-action-btn.active svg { color: white; }


/* ===== Simulation Banner ===== */
.simulation-banner {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0; right: 0;
    z-index: 998;
    background: linear-gradient(135deg, var(--simulation-color), #7c3aed);
    color: white; padding: 10px 24px;
    text-align: center; font-weight: 700; font-size: 14px;
    align-items: center; justify-content: center; gap: 16px;
}

body.simulation-mode .simulation-banner { display: flex; }
body.simulation-mode { padding-top: calc(var(--header-height) + 44px); }
body.simulation-mode .content-wrapper { height: calc(100vh - var(--header-height) - 44px); }
.simulation-banner button {
    background: white; color: var(--simulation-color);
    border: none; padding: 6px 16px; border-radius: 50px;
    font-weight: 700; font-family: inherit; cursor: pointer; font-size: 13px;
}

/* ===== Major Selector Input ===== */
.major-selector-center {
    display: flex; justify-content: center;
    align-items: center; flex: 1;
}

.major-input {
    width: 100%; max-width: 500px;
    padding: 12px 24px;
    background-color: white; color: var(--text-primary);
    border: 1px solid #ced4da; border-radius: 50px;
    font-size: 16px; font-weight: 500;
    font-family: var(--font-family);
    cursor: pointer; transition: all 0.2s;
    text-align: right; outline: none;
}

.major-input:hover { border-color: #adb5bd; }
.major-input:focus { border-color: #0d6efd; box-shadow: 0 0 0 3px rgba(13,110,253,0.1); }
.major-input::placeholder { color: var(--text-secondary); font-weight: 400; }

/* ===== Content Wrapper & Layout ===== */
.content-wrapper {
    display: flex;
    height: calc(100vh - var(--header-height));
}

.main {
    order: 1; flex: 1; min-width: 0;
    padding: 30px; overflow-y: auto;
    min-height: 500px;
}

.summary {
    order: 2; flex: 0 0 340px;
    padding: 20px; background: var(--bg-surface);
    border-right: 1px solid var(--border-light);
    border-left: none; overflow-y: auto;
}

.summary h2 { margin-top: 0; font-size: 22px; }
.table-wrapper { overflow-x: auto; width: 100%; }

/* Desktop-only table visibility */
.desktop-only { display: block; }

/* ===== Summary Column ===== */
.total-progress-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 12px 20px;
    margin-bottom: 18px;
}

/* Grade card header with toggle */
.grade-card-header {
    display: flex;
    justify-content: flex-start;
    margin-bottom: -8px;
}

.toggle-average-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px 10px;
    color: var(--text-secondary);
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: color 0.2s, background 0.2s;
    font-family: var(--font-family);
    font-size: 13px;
    font-weight: 600;
}

.toggle-average-btn:hover {
    color: var(--text-primary);
    background: var(--bg-main);
}

.grade-card-hidden-msg {
    text-align: center;
    padding: 12px 0;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

/* Hide grade values when average is toggled off */
body.grades-hidden .grade-input-cell {
    visibility: hidden;
}

body.grades-hidden .stat-item:has(.card-grade-input) {
    visibility: hidden;
}


.hero-stat { text-align: center; margin: 16px 0; }
.hero-value { font-size: 44px; font-weight: 800; color: var(--progress-done-bg); line-height: 1; }
.hero-subtext { font-size: 16px; color: var(--text-primary); font-weight: 500; }
.hero-breakdown-text { font-size: 14px; color: var(--text-secondary); margin-top: 4px; }
.hero-breakdown-text strong { font-weight: 700; color: var(--text-primary); }

.simulated-avg-row {
    display: flex; justify-content: space-between; align-items: center;
    padding: 10px 12px; margin-top: 8px;
    background: linear-gradient(135deg, #f5f0ff, #ede4ff);
    border-radius: 8px; border: 1px solid var(--simulation-color);
}

.sim-label { font-size: 13px; font-weight: 600; color: var(--simulation-color); }
.sim-value { font-size: 22px; font-weight: 800; color: var(--simulation-color); }

.total-progress-legend {
    display: flex; flex-wrap: wrap;
    gap: 12px; row-gap: 8px;
    margin-top: 12px;
}

.legend-item {
    display: flex; align-items: center;
    gap: 6px; font-size: 13px; color: var(--text-secondary);
}
.legend-item .dot { width: 10px; height: 10px; border-radius: 50%; }
.legend-item strong { font-weight: 700; color: var(--text-primary); }

.progress-bar-container {
    width: 100%; background-color: var(--progress-track-bg);
    border-radius: 50px; height: 10px; overflow: hidden;
}
.stacked-progress-bar { display: flex; height: 100%; width: 100%; }
.bar-segment { transition: width 0.5s ease-in-out; }

/* ===== Requirement Cards ===== */
.summary-cards { display: flex; flex-direction: column; gap: 12px; }

.requirement-card {
    border-radius: 8px; padding: 12px 16px; border: none;
    border-left: 5px solid transparent;
    box-shadow: 0 1px 3px rgba(0,0,0,0.03);
}

.req-card-header {
    display: flex; justify-content: space-between;
    align-items: baseline; margin-bottom: 8px;
}

.card-title { margin: 0; font-size: 15px; font-weight: 700; color: var(--text-primary); }
.card-progress-summary { font-size: 13px; font-weight: 500; color: var(--text-secondary); }
.card-progress-summary strong { font-weight: 700; }
.card-progress-breakdown { font-size: 13px; color: var(--text-secondary); font-weight: 500; margin-top: 8px; }
.card-progress-breakdown .separator { margin: 0 4px; opacity: 0.5; }
.card-footnote {
    font-size: 12px; color: var(--text-secondary); opacity: 0.9;
    margin: 8px 0 0 0; padding-top: 8px;
    border-top: 1px solid rgba(0,0,0,0.05);
}

/* Card color variants */
.requirement-card.purple  { background: var(--card-purple-bg); border-color: var(--card-purple-border); }
.requirement-card.purple .bar-completed { background-color: var(--card-purple-fill); }
.requirement-card.purple .bar-planned { background-color: rgba(168, 85, 247, 0.5); }
.requirement-card.purple .card-progress-summary strong { color: var(--card-purple-fill); }

.requirement-card.green { background: var(--card-green-bg); border-color: var(--card-green-border); }
.requirement-card.green .bar-completed { background-color: var(--card-green-fill); }
.requirement-card.green .bar-planned { background-color: rgba(34, 197, 94, 0.5); }
.requirement-card.green .card-progress-summary strong { color: var(--card-green-fill); }

.requirement-card.red { background: var(--card-red-bg); border-color: var(--card-red-border); }
.requirement-card.red .bar-completed { background-color: var(--card-red-fill); }
.requirement-card.red .bar-planned { background-color: rgba(239, 68, 68, 0.5); }
.requirement-card.red .card-progress-summary strong { color: var(--card-red-fill); }

.requirement-card.orange { background: var(--card-orange-bg); border-color: var(--card-orange-border); }
.requirement-card.orange .bar-completed { background-color: var(--card-orange-fill); }
.requirement-card.orange .bar-planned { background-color: rgba(249, 115, 22, 0.5); }
.requirement-card.orange .card-progress-summary strong { color: var(--card-orange-fill); }

.requirement-card.blue { background: var(--card-blue-bg); border-color: var(--card-blue-border); }
.requirement-card.blue .bar-completed { background-color: var(--card-blue-fill); }
.requirement-card.blue .bar-planned { background-color: rgba(59, 130, 246, 0.5); }
.requirement-card.blue .card-progress-summary strong { color: var(--card-blue-fill); }

.requirement-card.yellow { background: var(--card-yellow-bg); border-color: var(--card-yellow-border); }
.requirement-card.yellow .bar-completed { background-color: var(--card-yellow-fill); }
.requirement-card.yellow .bar-planned { background-color: rgba(234, 179, 8, 0.5); }
.requirement-card.yellow .card-progress-summary strong { color: var(--card-yellow-fill); }

.requirement-card.pink { background: var(--card-pink-bg); border-color: var(--card-pink-border); }
.requirement-card.pink .bar-completed { background-color: var(--card-pink-fill); }
.requirement-card.pink .bar-planned { background-color: rgba(236, 72, 153, 0.5); }
.requirement-card.pink .card-progress-summary strong { color: var(--card-pink-fill); }

.requirement-card.teal { background: var(--card-teal-bg); border-color: var(--card-teal-border); }
.requirement-card.teal .bar-completed { background-color: var(--card-teal-fill); }
.requirement-card.teal .bar-planned { background-color: rgba(45, 212, 191, 0.5); }
.requirement-card.teal .card-progress-summary strong { color: var(--card-teal-fill); }

.requirement-card.indigo { background: var(--card-indigo-bg); border-color: var(--card-indigo-border); }
.requirement-card.indigo .bar-completed { background-color: var(--card-indigo-fill); }
.requirement-card.indigo .bar-planned { background-color: rgba(99, 102, 241, 0.5); }
.requirement-card.indigo .card-progress-summary strong { color: var(--card-indigo-fill); }

.requirement-card.gray { background: var(--card-gray-bg); border-color: var(--card-gray-border); }
.requirement-card.gray .bar-completed { background-color: var(--card-gray-fill); }
.requirement-card.gray .bar-planned { background-color: rgba(107, 114, 128, 0.5); }
.requirement-card.gray .card-progress-summary strong { color: var(--card-gray-fill); }

.reset-container { margin-top: 24px; }
.reset-btn {
    width: 100%; padding: 10px;
    border: 1px solid var(--danger-color);
    background: transparent; color: var(--danger-color);
    border-radius: 8px; cursor: pointer;
    font-weight: 500; font-family: inherit;
}
.reset-btn:hover { background-color: #fef2f2; }

/* ===== Simulation Tools ===== */
.simulation-tools { margin-top: 20px; }
.simulation-tools h3 { font-size: 18px; margin-bottom: 12px; }

.sim-tool-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 16px; margin-bottom: 14px;
}
.sim-tool-card h4 { margin: 0 0 6px 0; font-size: 15px; font-weight: 700; }
.sim-tool-desc { font-size: 13px; color: var(--text-secondary); margin: 0 0 12px 0; }

.sim-input-group { display: flex; gap: 8px; }

.sim-input-group input {
    flex: 1; padding: 10px 14px;
    border: 1px solid var(--border-color); border-radius: 8px;
    font-family: inherit; font-size: 14px;
    outline: none; direction: rtl;
}
.sim-input-group input:focus {
    border-color: var(--simulation-color);
    box-shadow: 0 0 0 3px rgba(139,92,246,0.1);
}

.sim-btn {
    padding: 10px 20px; background: var(--simulation-color);
    color: white; border: none; border-radius: 8px;
    font-weight: 700; font-family: inherit;
    cursor: pointer; font-size: 14px;
}
.sim-btn:hover { background: #7c3aed; }
.sim-results { margin-top: 14px; }

.sim-result-item {
    display: flex; justify-content: space-between;
    align-items: center; padding: 10px 14px;
    background: #f8f7ff; border: 1px solid #e9e5ff;
    border-radius: 8px; margin-bottom: 8px; font-size: 13px;
}
.sim-result-item .course-name { font-weight: 600; flex: 1; }
.sim-result-item .impact-badge {
    background: var(--simulation-color); color: white;
    padding: 3px 10px; border-radius: 50px;
    font-size: 12px; font-weight: 700; margin-right: 8px;
}
.sim-result-item .grade-info {
    font-size: 12px; color: var(--text-secondary); margin-right: 8px;
}
.sim-no-result {
    text-align: center; padding: 16px;
    color: var(--text-secondary); font-size: 14px;
}
.sim-result-summary {
    padding: 12px;
    background: linear-gradient(135deg, #f5f0ff, #ede4ff);
    border-radius: 8px; text-align: center;
    font-size: 14px; font-weight: 600;
    color: var(--simulation-color); margin-top: 10px;
}

/* ============================================= */
/* ===== Semester Containers                      */
/* ============================================= */

#add-semester-btn {
    background-color: var(--text-secondary); color: white;
    border: none; padding: 10px 20px; border-radius: 8px;
    font-weight: 700; font-family: var(--font-family);
    cursor: pointer; margin-top: 20px;
}
#add-semester-btn:hover { background-color: #5a6268; }

.semester-container {
    background-color: var(--bg-surface); border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    overflow: hidden; margin-bottom: 30px;
}

.semester-header { padding: 20px 24px; border-bottom: 1px solid var(--border-color); }
.semester-header h3 {
    display: flex; justify-content: space-between;
    align-items: center; margin: 0 0 4px 0; font-size: 22px;
}
.semester-header p { margin: 0; color: var(--text-secondary); font-size: 14px; }

.delete-semester-btn {
    background: none; border: 1px solid var(--border-color);
    color: var(--text-secondary); font-size: 13px;
    padding: 4px 10px; border-radius: 6px;
    cursor: pointer; font-family: inherit;
}
.delete-semester-btn:hover {
    background-color: #f8f9fa;
    color: var(--text-danger);
    border-color: var(--text-danger);
}

/* ===== Main Course Table ===== */
.courses-table { width: 100%; border-collapse: collapse; table-layout: auto; }
.courses-table thead { background-color: var(--header-bg); }
.courses-table th {
    padding: 12px 24px; font-size: 12px; font-weight: 700;
    color: var(--text-secondary); text-transform: uppercase;
    letter-spacing: 0.5px; text-align: right;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}
.courses-table td { padding: 14px 24px; vertical-align: middle; }

.col-drag { width: 36px; }
.col-actions { width: 48px; }

.course-row {
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s;
}
.course-row:last-child { border-bottom: none; }
.course-row:hover { background-color: #fafbfc; }
.course-row td:first-child { border-right: 4px solid transparent; }

/* Category side colors for rows */
.course-row.cat-mandatory td:first-child { border-right-color: var(--side-color-mandatory); }
.course-row.cat-choice td:first-child { border-right-color: var(--side-color-choice); }
.course-row.cat-lab td:first-child { border-right-color: var(--side-color-lab); }
.course-row.cat-spirit td:first-child { border-right-color: var(--side-color-spirit); }
.course-row.cat-seminar td:first-child { border-right-color: var(--side-color-seminar); }
.course-row.cat-workshop td:first-child { border-right-color: var(--side-color-workshop); }
.course-row.cat-project td:first-child { border-right-color: var(--side-color-project); }
.course-row.cat-english td:first-child { border-right-color: var(--side-color-english); }
.course-row.cat-other td:first-child { border-right-color: var(--side-color-other); }

/* Drag Handle */
.drag-handle {
    width: 20px; text-align: center;
    color: #ced4da; cursor: grab;
    padding-right: 12px; padding-left: 0;
    user-select: none;
}
.drag-handle:active { cursor: grabbing; }

.semester-container tbody.drop-hover,
.mobile-courses-list.drop-hover { background: #e6f0ff; }
.course-row.dragging { opacity: 0.5; background: #f8f9fa; }
.course-card.dragging { opacity: 0.5; }

/* Course Info */
.course-info .name { font-weight: 500; font-size: 15px; color: var(--text-primary); }
.course-info .code { font-size: 13px; color: var(--text-secondary); }
.data-cell { text-align: center !important; }

/* Prereq cell */
.prereq-cell {
    font-size: 13px; color: var(--text-secondary);
    max-width: 200px; word-wrap: break-word;
}
.prereq-text { font-size: 12px; line-height: 1.4; }
.no-prereq { color: #ccc; }

/* ===== Category Badge ===== */
.category-badge {
    display: inline-block; padding: 4px 12px;
    font-size: 12px; font-weight: 700;
    border-radius: 16px; line-height: 1.2;
    border: 1px solid; white-space: nowrap;
}

.category-badge.cat-mandatory { background-color: var(--cat-mandatory-bg); color: var(--side-color-mandatory); border-color: var(--side-color-mandatory); }
.category-badge.cat-choice { background-color: var(--cat-choice-bg); color: var(--side-color-choice); border-color: var(--side-color-choice); }
.category-badge.cat-lab { background-color: var(--cat-lab-bg); color: var(--side-color-lab); border-color: var(--side-color-lab); }
.category-badge.cat-spirit { background-color: var(--cat-spirit-bg); color: var(--side-color-spirit); border-color: var(--side-color-spirit); }
.category-badge.cat-seminar { background-color: var(--cat-seminar-bg); color: var(--side-color-seminar); border-color: var(--side-color-seminar); }
.category-badge.cat-workshop { background-color: var(--cat-workshop-bg); color: var(--side-color-workshop); border-color: var(--side-color-workshop); }
.category-badge.cat-project { background-color: var(--cat-project-bg); color: var(--side-color-project); border-color: var(--side-color-project); }
.category-badge.cat-english { background-color: var(--cat-english-bg); color: var(--side-color-english); border-color: var(--side-color-english); }
.category-badge.cat-other { background-color: var(--cat-other-bg); color: var(--side-color-other); border-color: var(--side-color-other); }

/* Core & English badges */
.core-tag {
    color: var(--card-green-fill); font-weight: 700;
    font-size: 12px;
}

.core-badge {
    display: inline-block;
    background: var(--card-green-bg);
    color: var(--card-green-fill);
    border: 1px solid var(--card-green-border);
    padding: 2px 10px; border-radius: 12px;
    font-size: 11px; font-weight: 700;
    white-space: nowrap;
}

.pf-badge {
    color: #f59e0b; font-weight: 700; font-size: 12px;
}
.pf-label {
    color: var(--text-secondary); font-size: 13px; font-weight: 600;
}

/* Added badge in selector */
.added-badge {
    font-size: 12px; font-weight: 700;
    color: var(--success-color);
}

/* Delete button */
.delete-btn {
    background: none; border: none; padding: 4px;
    color: var(--text-secondary); line-height: 1; cursor: pointer;
}
.delete-btn:hover { color: var(--text-danger); }
.delete-btn svg { width: 18px; height: 18px; }

.done-checkbox {
    cursor: pointer; width: 18px; height: 18px;
    accent-color: var(--success-color);
}

.english-checkbox {
    cursor: pointer; width: 18px; height: 18px;
    accent-color: var(--primary-color);
}

/* ===== Grade Input ===== */
.grade-input-cell { min-width: 80px; }

.grade-input {
    width: 65px; padding: 6px 10px;
    border: 1px solid var(--border-color); border-radius: 6px;
    text-align: center; font-family: inherit;
    font-size: 14px; font-weight: 600;
    outline: none; transition: border-color 0.2s, box-shadow 0.2s;
    background: var(--bg-surface);
}
.grade-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}
.grade-input.grade-high { border-color: var(--grade-good); color: var(--grade-good); background: #f0fdf4; }
.grade-input.grade-mid { border-color: var(--grade-mid); color: var(--grade-mid); background: #fffbeb; }
.grade-input.grade-low { border-color: var(--grade-bad); color: var(--grade-bad); background: #fef2f2; }
.grade-input.simulated {
    border-color: var(--simulation-color);
    background: #f5f0ff;
    color: var(--simulation-color);
}

/* ===== Semester Footer ===== */
.semester-footer {
    display: flex; justify-content: space-between;
    align-items: center; padding: 16px 24px;
    background-color: var(--header-bg);
    border-top: 1px solid var(--border-color);
}
.semester-summary { font-weight: 700; color: var(--text-primary); }
.semester-avg { font-size: 13px; color: var(--text-secondary); margin-right: 16px; }

.add-course-btn {
    background-color: #0d6efd; color: white;
    border: none; padding: 8px 16px; border-radius: 8px;
    font-weight: 700; font-family: var(--font-family);
    cursor: pointer; display: flex; align-items: center; gap: 8px;
}
.add-course-btn:hover { background-color: #0b5ed7; }

/* ===== Empty Semester ===== */
.empty-semester {
    padding: 40px 24px; text-align: center;
    color: var(--text-secondary); font-size: 14px;
}
.empty-semester svg { color: #ced4da; margin-bottom: 8px; }

/* ============================================= */
/* ===== Course Selector Table                    */
/* ============================================= */

.selector-count-bar {
    padding: 10px 24px; font-size: 13px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    background: var(--header-bg);
}

.selector-table {
    width: 100%; border-collapse: collapse; table-layout: auto;
}

.selector-table thead { background-color: var(--header-bg); position: sticky; top: 0; z-index: 1; }

.selector-table th {
    padding: 12px 16px; font-size: 12px; font-weight: 700;
    color: var(--text-secondary); text-transform: uppercase;
    letter-spacing: 0.5px; text-align: right;
    border-bottom: 2px solid var(--border-color);
    white-space: nowrap;
}

.sortable-header {
    cursor: pointer; user-select: none;
    transition: color 0.2s;
}
.sortable-header:hover { color: var(--primary-color); }

.selector-table td {
    padding: 12px 16px; vertical-align: middle;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}

.selector-table tbody tr { transition: background 0.15s; cursor: default; }
.selector-table tbody tr:hover { background: #f8fafd; }

.selector-table tbody tr.already-added {
    opacity: 0.5; background: #f8f9fa;
}

.selector-course-info .name { font-weight: 600; font-size: 14px; color: var(--text-primary); }
.selector-course-info .code { font-size: 12px; color: var(--text-secondary); }

.selector-add-btn {
    padding: 5px 14px;
    background: var(--primary-color); color: white;
    border: none; border-radius: 6px;
    font-size: 12px; font-weight: 700;
    font-family: inherit; cursor: pointer;
    white-space: nowrap; transition: background 0.2s;
}
.selector-add-btn:hover { background: #0b5ed7; }

/* ============================================= */
/* ===== Modal System                             */
/* ============================================= */

.modal-overlay {
    position: fixed; top: 0; right: 0; bottom: 0; left: 0;
    background-color: rgba(33, 37, 41, 0.6);
    backdrop-filter: blur(4px);
    z-index: 2000; display: flex;
    align-items: center; justify-content: center;
    padding: 20px;
}

.modal-content {
    background: var(--bg-surface); border-radius: 16px;
    width: 90%; max-width: 600px; max-height: 85vh;
    overflow: hidden; display: flex; flex-direction: column;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}
.modal-content-lg {
    max-width: 1250px;
    width: 95%;
    overflow: hidden;
}

.selector-filters-row {
    display: flex;
    align-items: flex-end;
    gap: 20px;
    width: 100%;
    flex-wrap: wrap;
}

.selector-filter-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-shrink: 0;
}

.selector-filter-group.expand-group {
    flex: 1;
    min-width: 180px;
}

.selector-filter-group label {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.selector-dropdown {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    background: white;
    cursor: pointer;
    outline: none;
    transition: border-color 0.2s;
    min-width: 140px;
    height: 38px;
}

.selector-dropdown:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.filter-checkbox-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    cursor: pointer;
    white-space: nowrap;
}

.avg-slider-input {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border-color);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.avg-slider-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.dual-range-input {
    pointer-events: none;
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    height: 6px;
}

.dual-range-input::-webkit-slider-thumb {
    pointer-events: auto;
    position: relative;
    z-index: 10;
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.dual-range-input::-webkit-slider-runnable-track {
    background: transparent;
    height: 6px;
}

.clear-filters-btn {
    background: none;
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.2s;
    height: 38px;
    white-space: nowrap;
}

.clear-filters-btn:hover {
    background-color: #fee2e2;
    color: var(--text-danger);
    border-color: var(--text-danger);
}

@media (max-width: 1100px) {
    .selector-filters-row {
        align-items: flex-start;
    }
    .selector-filter-group.expand-group {
        min-width: 100%;
    }
}

/* ===== English Badge ===== */
.eng-badge {
    display: inline-block;
    background: var(--cat-english-bg);
    color: var(--side-color-english);
    border: 1px solid var(--side-color-english);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 700;
}

@media (max-width: 768px) {
    .selector-filters-row {
        flex-direction: column;
        gap: 12px;
    }
    
    .selector-filter-group {
        width: 100%;
    }
    
    .selector-dropdown {
        width: 100%;
    }

    .modal-content-lg { max-width: 100%; }
}
.modal-header {
    display: flex; justify-content: space-between;
    align-items: center; padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    background: var(--header-bg); flex-shrink: 0;
}
.modal-header h2 { margin: 0; font-size: 20px; }

.modal-close-btn {
    background: none; border: none; font-size: 28px;
    color: var(--text-secondary); cursor: pointer;
    line-height: 1; padding: 0;
}
.modal-close-btn:hover { color: var(--text-primary); }

.controls-container {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 45vh;
    overflow-y: auto;
}

.search-group { width: 100%; }

.search-input {
    width: 100%; padding: 12px 16px;
    border: 1px solid var(--border-color); border-radius: 10px;
    font-size: 15px; font-family: inherit;
    outline: none; transition: border-color 0.2s;
}
.search-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.filter-bar { display: flex; gap: 8px; flex-wrap: wrap; }

.filter-chip {
    padding: 6px 14px;
    border: 1px solid var(--border-color); border-radius: 50px;
    font-size: 13px; font-weight: 600; font-family: inherit;
    cursor: pointer; background: white;
    color: var(--text-secondary); transition: all 0.2s;
}
.filter-chip:hover { border-color: var(--primary-color); color: var(--primary-color); }
.filter-chip.active { background: var(--primary-color); color: white; border-color: var(--primary-color); }

.modal-body { flex: 1; overflow-y: auto; padding: 0; }
.courses-table-container { flex: 1; overflow-y: auto; }

/* ===== Advanced Filters Grid (Redesigned) ===== */
.advanced-filters-grid {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    margin-top: 10px;
    border-top: 1px solid var(--border-color);
    padding-top: 14px;
    flex-wrap: wrap;
}

.adv-filter-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.adv-filter-item > label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 600;
}

/* Dual range slider */
.adv-filter-range {
    flex: 1;
    min-width: 200px;
}

.dual-range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-secondary);
}

.dual-range-labels strong {
    color: var(--text-primary);
    font-size: 13px;
}

.dual-range-container {
    position: relative;
    height: 28px;
    display: flex;
    align-items: center;
    width: 100%;
    min-width: 0;
    overflow: visible;
}

.dual-range-input {
    position: absolute;
    left: 0;
    right: 0;
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    outline: none;
    cursor: pointer;
    pointer-events: none;
    margin: 0;
}

.dual-range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 1px 4px rgba(0,0,0,0.25);
    pointer-events: all;
    position: relative;
    z-index: 2;
}

.dual-range-input::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 1px 4px rgba(0,0,0,0.25);
    pointer-events: all;
}

.dual-range-input:first-child::-webkit-slider-runnable-track {
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
}

.dual-range-input:first-child::-moz-range-track {
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
}

.dual-range-input:last-child::-webkit-slider-runnable-track {
    height: 6px;
    background: transparent;
}

.dual-range-input:last-child::-moz-range-track {
    height: 6px;
    background: transparent;
}

/* Checkbox filters */
.adv-filter-checkboxes {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-width: 160px;
}

.filter-checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    user-select: none;
}

.filter-checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

/* Clear filters button */
.adv-filter-actions {
    display: flex;
    align-items: flex-end;
    min-width: 120px;
}

.clear-filters-btn {
    padding: 8px 16px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    font-family: inherit;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.clear-filters-btn:hover {
    border-color: var(--danger-color);
    color: var(--danger-color);
    background: #fef2f2;
}

/* Tau Factor Link */
.tau-factor-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    transition: color 0.2s, transform 0.2s;
    text-decoration: none;
}

.tau-factor-link:hover {
    color: #0b5ed7;
    transform: scale(1.15);
}

.tau-factor-link svg {
    width: 20px;
    height: 20px;
}

/* Semester cell in selector */
.semester-cell {
    font-size: 12px;
    color: var(--text-secondary);
    max-width: 180px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Responsive: filters + selector columns */
@media (max-width: 768px) {
    .advanced-filters-grid {
        flex-direction: column;
        gap: 16px;
    }

    .adv-filter-range {
        width: 100%;
    }

    .header-action-btn span { display: none; }

    .selector-table th:nth-child(5),
    .selector-table td:nth-child(5),
    .selector-table th:nth-child(6),
    .selector-table td:nth-child(6),
    .selector-table th:nth-child(7),
    .selector-table td:nth-child(7),
    .selector-table th:nth-child(9),
    .selector-table td:nth-child(9) {
        display: none;
    }
}

@media (max-width: 480px) {
    .selector-table th:nth-child(4),
    .selector-table td:nth-child(4) {
        display: none;
    }
}

/* ===== Toast ===== */
.toast-notification {
    position: fixed; z-index: 3000;
    bottom: 24px; left: 24px;
    background: white; color: var(--text-primary);
    padding: 16px 24px; border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
    border-right: 5px solid var(--success-color);
    min-width: 300px; max-width: 90vw;
    display: flex; align-items: center; gap: 16px;
    direction: rtl; font-family: var(--font-family);
    animation: slideUp 0.4s ease-out;
}
.toast-notification.hidden { display: none; }
.toast-content { display: flex; align-items: flex-start; gap: 12px; width: 100%; }
.toast-icon { font-size: 24px; }
.toast-text h4 { margin: 0 0 4px 0; font-size: 16px; font-weight: 800; }
.toast-text p { margin: 0; font-size: 14px; color: var(--text-secondary); line-height: 1.4; }

.toast-close {
    background: transparent; border: none; font-size: 20px;
    color: #aaa; cursor: pointer; padding: 4px;
    margin-right: auto; line-height: 1;
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%; transition: all 0.2s;
}
.toast-close:hover { background-color: #f0f0f0; color: #333; }

@keyframes slideUp {
    from { transform: translateY(100%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* ===== Settings Modal ===== */
.exemption-field-row {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 16px; background: var(--bg-main);
    border: 1px solid var(--border-color); border-radius: 10px;
    margin-bottom: 10px; transition: border-color 0.2s;
}
.exemption-field-row:hover { border-color: var(--primary-color); }
.exemption-field-row .exemption-label { display: flex; flex-direction: column; flex: 1; }
.exemption-field-row .exemption-label .title { font-weight: 700; font-size: 14px; color: var(--text-primary); }
.exemption-field-row .exemption-label .subtitle { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }
.exemption-field-row .exemption-color-dot {
    width: 12px; height: 12px; border-radius: 50%;
    margin-left: 12px; flex-shrink: 0;
}
.exemption-input {
    width: 70px; padding: 8px 10px;
    border: 1px solid var(--border-color); border-radius: 8px;
    text-align: center; font-family: inherit;
    font-size: 15px; font-weight: 700;
    outline: none; transition: border-color 0.2s, box-shadow 0.2s;
    margin-right: 12px;
}
.exemption-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}
.settings-description {
    font-size: 14px; color: var(--text-secondary);
    margin: 0 0 20px 0; line-height: 1.6;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
}

/* ===== Onboarding ===== */
body.is-onboarding .site-header,
body.is-onboarding .content-wrapper {
    filter: blur(5px);
    pointer-events: none;
    user-select: none;
}

body.is-onboarding #close-major-selector-btn { display: none !important; }

body.is-onboarding #major-selector-overlay {
    background-color: rgba(33, 37, 41, 0.9);
    backdrop-filter: blur(5px);
}

body.is-onboarding .modal-content {
    border-radius: 16px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
    border: none; max-width: 700px;
    height: 85vh; max-height: 800px;
    background-color: #f8f9fa;
}

body.is-onboarding .modal-header {
    background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
    color: white; padding: 2.5rem 1.5rem;
    border: none; text-align: center;
}
body.is-onboarding .modal-header h2 {
    font-size: 1.8rem; font-weight: 800; color: white;
}
body.is-onboarding .controls-container {
    background: white; padding: 1.5rem 2rem;
    border-bottom: 1px solid #e9ecef;
}
body.is-onboarding .search-input {
    height: 50px; font-size: 1.1rem;
    border-radius: 12px; background-color: #f8f9fa;
}
body.is-onboarding .search-input:focus {
    background-color: white; border-color: #0d6efd;
    box-shadow: 0 0 0 4px rgba(13,110,253,0.15);
}

body.is-onboarding .courses-table-container,
body.is-onboarding .modal-body {
    flex-grow: 1; overflow-y: auto;
    padding: 0; background-color: #f4f7fa;
}
body.is-onboarding .courses-table thead { display: none; }
body.is-onboarding .courses-table tbody {
    display: flex; flex-direction: column;
    gap: 10px; padding: 20px;
}
body.is-onboarding .courses-table tr {
    display: flex; align-items: center; justify-content: space-between;
    background: white; border: 1px solid #e9ecef;
    border-radius: 12px; padding: 18px 20px;
    cursor: pointer; transition: transform 0.1s, box-shadow 0.1s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.02);
}
body.is-onboarding .courses-table tr:hover {
    border-color: #0d6efd; transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(13,110,253,0.1);
}
body.is-onboarding .courses-table td {
    border: none; padding: 0;
}
body.is-onboarding .courses-table td:first-child {
    font-size: 1.1rem; font-weight: 700; color: #212529;
}
body.is-onboarding .courses-table td:last-child {
    background-color: #e9ecef; padding: 5px 10px;
    border-radius: 6px; font-size: 0.85rem;
    color: #495057; font-weight: 600;
}

/* ===== Footer ===== */
.site-footer-bottom {
    text-align: center; padding: 24px; margin-top: 30px;
    font-size: 14px; color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
}
.site-footer-bottom a {
    color: var(--text-primary); font-weight: 700;
    text-decoration: none; transition: color 0.2s;
}
.site-footer-bottom a:hover {
    color: var(--primary-color); text-decoration: underline;
}

/* ===== Skeleton / Loading ===== */
.skeleton-loading {
    text-align: center; padding: 60px 20px;
    color: var(--text-secondary); font-size: 16px;
}
.skeleton-loading .spinner {
    width: 40px; height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== No Major State ===== */
.no-major-state {
    text-align: center; padding: 80px 20px;
    color: var(--text-secondary);
}
.no-major-state svg { color: #ced4da; margin-bottom: 16px; }
.no-major-state h3 { font-size: 20px; color: var(--text-primary); margin-bottom: 8px; }
.no-major-state p { font-size: 15px; }
/* ===== Tau Factor Link ===== */
.tau-factor-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    transition: color 0.2s, transform 0.2s;
    text-decoration: none;
}
.tau-factor-link:hover {
    color: #0b5ed7;
    transform: scale(1.15);
}
.tau-factor-link svg {
    width: 20px;
    height: 20px;
}

/* ===== Semester cell in selector ===== */
.semester-cell {
    font-size: 12px;
    color: var(--text-secondary);
    max-width: 180px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ============================================= */
/* ===== RESPONSIVE                               */
/* ============================================= */

.mobile-courses-list { display: none; }

@media (max-width: 1280px) {
    .desktop-only { display: none !important; }
    .mobile-courses-list {
        display: flex; flex-direction: column;
        gap: 16px; padding: 16px;
    }

    .course-card {
        display: flex; flex-direction: column;
        border-radius: 10px; background-color: var(--bg-surface);
        box-shadow: 0 4px 15px rgba(0,0,0,0.06);
        border: 1px solid var(--border-color);
        border-right: 4px solid transparent;
    }

    .course-card.cat-mandatory { border-right-color: var(--side-color-mandatory); }
    .course-card.cat-choice { border-right-color: var(--side-color-choice); }
    .course-card.cat-lab { border-right-color: var(--side-color-lab); }
    .course-card.cat-spirit { border-right-color: var(--side-color-spirit); }
    .course-card.cat-seminar { border-right-color: var(--side-color-seminar); }
    .course-card.cat-workshop { border-right-color: var(--side-color-workshop); }
    .course-card.cat-project { border-right-color: var(--side-color-project); }
    .course-card.cat-english { border-right-color: var(--side-color-english); }
    .course-card.cat-other { border-right-color: var(--side-color-other); }

    .card-top {
        display: flex; gap: 12px; align-items: center;
        padding: 12px 16px;
        border-bottom: 1px solid var(--border-color);
    }
    .card-top .course-info { flex-grow: 1; }
    .card-top .drag-handle { cursor: grab; color: #ced4da; }
    .card-top .drag-handle:active { cursor: grabbing; }

    .card-body { padding: 16px; }

    .card-stats {
        display: grid; grid-template-columns: repeat(2, 1fr);
        gap: 16px; font-size: 14px;
    }

    .stat-item .label { font-size: 12px; color: var(--text-secondary); }
    .stat-item .value { font-weight: 700; color: var(--text-primary); }
    .stat-item.stat-wide { grid-column: 1 / -1; }

    .card-actions {
        display: flex; justify-content: flex-end;
        align-items: center; padding: 12px 16px;
        border-top: 1px solid var(--border-color);
    }

    .card-grade-input {
        width: 70px; padding: 6px 10px;
        border: 1px solid var(--border-color); border-radius: 6px;
        text-align: center; font-family: inherit;
        font-size: 14px; font-weight: 600;
    }

    /* Selector table also compacts */
    .selector-table th:nth-child(4),
    .selector-table td:nth-child(4),
    .selector-table th:nth-child(5),
    .selector-table td:nth-child(5) {
        display: none;
    }
}

@media (max-width: 768px) {
    body {
        padding-top: var(--header-height);
    }

    .content-wrapper {
        flex-direction: column; height: auto;
    }

    .summary, .main {
        overflow: visible; max-height: none;
    }

    .summary {
        flex: 0 0 auto; order: 1;
        border-left: none; border-right: none;
        border-bottom: 1px solid var(--border-light);
    }

    .main { order: 2; padding: 15px; }

        .total-progress-card {
        position: sticky;
        top: var(--header-height);
        z-index: 100;
        box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    }

    body.simulation-mode .total-progress-card {
        top: calc(var(--header-height) + 44px);
    }

    .header-container {
        grid-template-columns: max-content 1fr max-content;
        gap: 12px;
    }

    .major-input { padding: 10px 20px; font-size: 14px; }
    .logo span { display: none; }
    
    .modal-content {
        width: 100%; height: 100%;
        max-height: 100%; border-radius: 0;
    }

    body.is-onboarding .modal-content {
        width: 100%; height: 100%;
        max-height: none; border-radius: 0;
    }
    body.is-onboarding .modal-header { padding: 2rem 1.5rem; }
    body.is-onboarding .modal-header h2 { font-size: 1.5rem; }
    body.is-onboarding .controls-container { padding: 1rem 1.5rem; }
    body.is-onboarding .courses-table tbody { padding: 15px; }

    .simulation-banner { flex-direction: column; gap: 8px; padding: 12px; }


    /* Hide some selector columns on mobile */
    .selector-table th:nth-child(4),
    .selector-table td:nth-child(4),
    .selector-table th:nth-child(5),
    .selector-table td:nth-child(5),
    .selector-table th:nth-child(6),
    .selector-table td:nth-child(6),
    .selector-table th:nth-child(7),
    .selector-table td:nth-child(7) {
        display: none;
    }
}

@media (max-width: 480px) {
    .header-container { padding: 0 10px; gap: 8px; }
    h1, h2, h3 { font-size: 18px; }
    .semester-header { padding: 16px; }
    .semester-footer { padding: 12px 16px; flex-wrap: wrap; gap: 10px; }

    .selector-table th,
    .selector-table td { padding: 10px 8px; font-size: 13px; }

    /* On very small screens, hide even more selector columns */
    .selector-table th:nth-child(3),
    .selector-table td:nth-child(3) { display: none; }
}

/* ===== Number input spinner hide ===== */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none; margin: 0;
}
input[type="number"] { -moz-appearance: textfield; }

/* ===== Average Slider ===== */
.selector-filter-avg {
    min-width: 160px;
}

.avg-slider-value {
    display: block;
    font-size: 16px;
    font-weight: 800;
    color: var(--primary-color);
    text-align: left;
    margin-bottom: 2px;
}

.avg-slider-input {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border-color);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.avg-slider-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 1px 4px rgba(0,0,0,0.25);
}

.avg-slider-input::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 1px 4px rgba(0,0,0,0.25);
}

.english-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background: transparent;
    color: var(--border-color);
    font-size: 12px;
    font-weight: 800;
    cursor: pointer;
    user-select: none;
    transition: all 0.2s;
    line-height: 1;
}

.english-toggle:hover {
    border-color: var(--side-color-english);
    color: var(--side-color-english);
}

.english-toggle.active {
    background: var(--cat-english-bg);
    border-color: var(--side-color-english);
    color: var(--side-color-english);
}
.done-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background: transparent;
    color: var(--border-color);
    font-size: 16px;
    font-weight: 800;
    cursor: pointer;
    user-select: none;
    transition: all 0.2s;
    line-height: 1;
}

.done-toggle:hover {
    border-color: var(--progress-done-bg);
    color: var(--progress-done-bg);
}

.done-toggle.active {
    background: var(--card-green-bg);
    border-color: var(--progress-done-bg);
    color: var(--progress-done-bg);
}

/* ============================================= */
/* ===== Auth — Login, Profile, Sync              */
/* ============================================= */

/* --- Auth Header Button --- */
.auth-header-btn {
    position: relative;
    padding: 6px 14px !important;
}

.auth-header-btn .auth-avatar {
    border: 2px solid var(--progress-done-bg);
}

.auth-sync-dot {
    position: absolute;
    top: 6px;
    left: 6px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid white;
    display: none;
}

.auth-sync-dot.sync-ok {
    display: block;
    background: var(--progress-done-bg);
}

.auth-sync-dot.sync-pending {
    display: block;
    background: var(--grade-mid);
    animation: syncPulse 1.2s infinite;
}

.auth-sync-dot.sync-error {
    display: block;
    background: var(--danger-color);
}

@keyframes syncPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* --- Auth Modal --- */
.auth-provider-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 14px 20px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: white;
    font-family: var(--font-family);
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 10px;
}

.auth-provider-btn:hover {
    border-color: #adb5bd;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transform: translateY(-1px);
}

.auth-provider-btn:active {
    transform: translateY(0);
}

.auth-provider-btn svg {
    flex-shrink: 0;
}

.auth-skip-btn {
    display: inline-block;
    margin-top: 16px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.2s;
}

.auth-skip-btn:hover {
    background: var(--bg-main);
    color: var(--text-primary);
}

/* --- Profile Menu --- */
.auth-profile-menu {
    position: fixed;
    z-index: 2500;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    padding: 16px;
    min-width: 220px;
    direction: rtl;
    font-family: var(--font-family);
}

.auth-profile-email {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    word-break: break-all;
}

.auth-profile-sync {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.auth-profile-action {
    display: block;
    width: 100%;
    text-align: right;
    background: none;
    border: none;
    padding: 10px 8px;
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.15s;
}

.auth-profile-action:hover {
    background: var(--bg-main);
}

.auth-logout-action {
    color: var(--danger-color);
}

.auth-logout-action:hover {
    background: #fef2f2;
}

/* --- CTA Banner --- */
.auth-banner {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1200;
    background: linear-gradient(135deg, #0d6efd, #0a58ca);
    color: white;
    padding: 12px 24px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 14px;
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 8px 30px rgba(13, 110, 253, 0.35);
    animation: bannerSlideUp 0.5s ease-out;
    white-space: nowrap;
}

@keyframes bannerSlideUp {
    from { transform: translateX(-50%) translateY(100px); opacity: 0; }
    to { transform: translateX(-50%) translateY(0); opacity: 1; }
}

.auth-banner-login-btn {
    background: white;
    color: #0d6efd;
    border: none;
    padding: 8px 18px;
    border-radius: 50px;
    font-weight: 700;
    font-family: var(--font-family);
    font-size: 13px;
    cursor: pointer;
    transition: transform 0.2s;
}

.auth-banner-login-btn:hover {
    transform: scale(1.05);
}

.auth-banner-close {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    font-size: 18px;
    cursor: pointer;
    padding: 4px;
    line-height: 1;
}

.auth-banner-close:hover {
    color: white;
}

/* --- Conflict Modal --- */
.conflict-option {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 10px;
}

.conflict-icon {
    font-size: 28px;
}

.conflict-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.conflict-info strong {
    font-size: 15px;
    color: var(--text-primary);
}

.conflict-info span {
    font-size: 13px;
    color: var(--text-secondary);
}

.conflict-time {
    font-size: 12px !important;
    color: var(--text-secondary) !important;
}

.auth-conflict-btn {
    flex: 1;
    padding: 12px 16px;
    border: none;
    border-radius: 10px;
    font-family: var(--font-family);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
}

.auth-conflict-btn.local-btn {
    background: var(--bg-main);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.auth-conflict-btn.local-btn:hover {
    background: #e9ecef;
}

.auth-conflict-btn.cloud-btn {
    background: #0d6efd;
    color: white;
}

.auth-conflict-btn.cloud-btn:hover {
    background: #0b5ed7;
}

/* --- Mobile Adjustments --- */
@media (max-width: 768px) {
    .auth-banner {
        bottom: calc(var(--bottom-nav-height) + 16px);
        left: 12px;
        right: 12px;
        transform: none;
        border-radius: 14px;
        flex-wrap: wrap;
        justify-content: center;
        white-space: normal;
        text-align: center;
        gap: 10px;
        padding: 14px 18px;
    }

    @keyframes bannerSlideUp {
        from { transform: translateY(100px); opacity: 0; }
        to { transform: translateY(0); opacity: 1; }
    }

    .auth-profile-menu {
        left: 12px;
        right: 12px;
        top: auto !important;
        bottom: calc(var(--bottom-nav-height) + 12px);
        border-radius: 14px;
    }

    .auth-btn-text {
        display: none !important;
    }
}
/* ============================================= */
/* ===== Settings — Adjustments (Plus/Minus)      */
/* ============================================= */

.settings-section {
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.settings-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.settings-section-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 14px 0;
}

.adj-field-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 10px;
    transition: border-color 0.2s;
}

.adj-field-row:hover {
    border-color: var(--primary-color);
}

.adj-total-row {
    margin-top: 16px;
    background: var(--header-bg);
    border-width: 2px;
}

.adj-label {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
    min-width: 0;
}

.adj-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

.adj-subtitle {
    font-size: 12px;
    color: var(--text-secondary);
}

.adj-diff {
    font-size: 12px;
    font-weight: 700;
    margin-top: 2px;
}

.adj-diff.adj-plus {
    color: var(--primary-color);
}

.adj-diff.adj-minus {
    color: var(--danger-color);
}

.adj-controls {
    display: flex;
    align-items: center;
    gap: 0;
    flex-shrink: 0;
    margin-right: 16px;
}

.adj-btn {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    background: white;
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    font-family: var(--font-family);
    line-height: 1;
    user-select: none;
}

.adj-minus-btn {
    border-radius: 8px 0 0 8px;
    border-left: none;
}

.adj-plus-btn {
    border-radius: 0 8px 8px 0;
    border-right: none;
}

.adj-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.adj-btn:active {
    transform: scale(0.93);
}

.adj-value {
    min-width: 50px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 800;
    color: var(--text-primary);
    background: white;
    border: 1px solid var(--border-color);
    border-left: none;
    border-right: none;
    user-select: none;
}

.settings-major-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 10px;
}

.settings-major-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.settings-change-major-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 8px;
    font-family: var(--font-family);
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s;
}

.settings-change-major-btn:hover {
    background: #0b5ed7;
}

.settings-auth-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.settings-auth-email {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.settings-auth-status {
    font-size: 13px;
    color: var(--progress-done-bg);
    font-weight: 600;
}

.settings-auth-actions {
    display: flex;
    gap: 10px;
}

.settings-action-btn {
    display: block;
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    transition: all 0.2s;
}

.settings-action-btn:hover {
    background: #e9ecef;
}

.settings-action-btn.danger {
    color: var(--danger-color);
    border-color: var(--danger-color);
    background: transparent;
}

.settings-action-btn.danger:hover {
    background: #fef2f2;
}

/* Hide delete text on desktop */
.delete-btn-text {
    display: none;
}
/* =============================================
   PIN Input Styles
   ============================================= */

.pin-input-container {
    display: flex;
    justify-content: center;
    gap: 12px;
    direction: ltr;
    margin: 0 auto;
}

.pin-digit {
    width: 56px;
    height: 64px;
    text-align: center;
    font-size: 28px;
    font-weight: 700;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    caret-color: var(--accent-primary);
}

.pin-digit:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.15);
}

.pin-digit::selection {
    background: transparent;
}

.pin-submit-btn {
    display: block;
    width: 100%;
    padding: 14px;
    margin-top: 20px;
    font-size: 16px;
    font-weight: 600;
    color: white;
    background: var(--accent-primary);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: opacity 0.2s;
}

.pin-submit-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pin-submit-btn:not(:disabled):hover {
    opacity: 0.9;
}

.pin-forgot-btn {
    display: block;
    width: 100%;
    padding: 12px;
    margin-top: 12px;
    font-size: 14px;
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    text-decoration: underline;
}

.pin-forgot-btn:hover {
    color: var(--text-primary);
}

.pin-error {
    font-size: 14px;
    color: #dc3545;
    margin: 12px 0 0;
    animation: shake 0.3s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-6px); }
    75% { transform: translateX(6px); }
}