/* ===================================
   COLLEGE TIMETABLE GENERATOR - CSS
   =================================== */

/* ─── RESET & BASE ─── */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}
/* ─── CONTAINER ─── */
.container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

/* ─── HEADER ─── */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 32px 20px;
    text-align: center;
}

.header h1 {
    font-size: 2.4em;
    margin-bottom: 6px;
}

.header p {
    font-size: 1.05em;
    opacity: 0.88;
}
/* ─── CONTENT ─── */
.content {
    padding: 30px;
}

/* ─── INPUT SECTION ─── */
.input-section {
    background: #f8f9fa;
    padding: 28px;
    border-radius: 15px;
    margin-bottom: 30px;
}
.input-section h2 {
    margin-bottom: 20px;
    color: #333;
}

.input-group {
    margin-bottom: 18px;
}
.input-group label {
    display: block;
    margin-bottom: 7px;
    font-weight: 600;
    color: #333;
}
.input-group input,
.input-group select {
    width: 100%;
    padding: 11px 14px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 0.95em;
    transition: border 0.9s, box-shadow 0.3s;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

.input-group small {
    display: block;
    margin-top: 5px;
    color: #888;
    font-size: 0.82em;
}

.row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

/* ─── INFO & WARNING BOXES ─── */
.info-box {
    background: #e7f3ff;
    border-left: 4px solid #2196F3;
    padding: 14px 18px;
    margin-bottom: 22px;
    border-radius: 6px;
}

.info-box p {
    margin: 4px 0;
    color: #0d47a1;
    font-size: 0.9em;
}

.warning-box {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 14px 18px;
    margin-bottom: 22px;
    border-radius: 6px;
}

.warning-box p {
    margin: 4px 0;
    color: #856404;
    font-size: 0.9em;
}

/* ─── BUTTONS ─── */
.btn {
    padding: 11px 26px;
    border: none;
    border-radius: 8px;
    font-size: 0.95em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s;
    margin-right: 8px;
    margin-bottom: 8px;
}
.btn-primary {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 18px rgba(102, 126, 234, 0.4);
}

.btn-info {
    background: #17a2b8;
    color: #fff;
}

.btn-info:hover {
    background: #138496;
}

.btn-secondary {
    background: #6c757d;
    color: #fff;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-success {
    background: #28a745;
    color: #fff;
}

.btn-success:hover {
    background: #218838;
}

.btn-danger {
    background: #dc3545;
    color: #fff;
}

.btn-danger:hover {
    background: #c82333;
}
/* ─── SUBJECT-TEACHER PAIR EDITOR ─── */
.pair-editor {
    background: #eef2ff;
    border: 2px solid #c7d2fe;
    border-radius: 12px;
    padding: 20px;
    margin-top: 16px;
}

.pair-row {
    display: grid;
    grid-template-columns: 40px 1fr 1fr 120px 30px;
    gap: 10px;
    align-items: center;
    margin-bottom: 10px;
    background: white;
    padding: 10px;
    border-radius: 8px;
}

.pair-row input,
.pair-row select {
    padding: 8px 12px;
    border: 2px solid #c7d2fe;
    border-radius: 6px;
    font-size: 0.9em;
}

.pair-number {
    text-align: center;
    font-weight: 700;
    color: #667eea;
    font-size: 0.95em;
}

/* ─── TIMETABLE TABLE ─── */
.timetable-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 18px;
    background: #fff;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

th {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
    padding: 14px 10px;
    text-align: center;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    font-size: 0.88em;
}

td {
    padding: 12px 8px;
    text-align: center;
    border: 1px solid #e4e4e4;
    vertical-align: middle;
}

/* ─── TIME SLOT CELLS ─── */
.time-slot {
    background: #eef0f5;
    font-weight: 700;
    color: #3a3f6e;
    font-size: 0.88em;
    white-space: nowrap;
    min-width: 110px;
}

.time-period-label {
    display: block;
    font-size: 0.72em;
    color: #667eea;
    font-weight: 600;
    margin-bottom: 3px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
/* ─── SUBJECT CELLS ─── */
.subject-cell {
    background: linear-gradient(135deg, #eef5ff 0%, #f5eeff 100%);
    transition: background 0.2s;
}

.subject-cell:hover {
    background: linear-gradient(135deg, #dbeeff 0%, #ecdeff 100%);
}

.subject-name {
    display: block;
    font-weight: 700;
    color: #667eea;
    font-size: 0.92em;
    margin-bottom: 5px;
}

.teacher-name {
    display: block;
    font-size: 0.8em;
    color: #555;
    margin-top: 3px;
}

.classroom-name {
    display: block;
    font-size: 0.8em;
    color: #28a745;
    margin-top: 3px;
    font-weight: 500;
}

.year-btn {
    padding: 8px 18px;
    border: none;
    border-radius: 6px;
    background: #e0e0e0;
    cursor: pointer;
    font-weight: 600;
}

.year-btn.active {
    background: #667eea;
    color: white;
}
.nav-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    background: #e0e0e0;
    cursor: pointer;
    font-weight: 600;
}

.nav-btn.active {
    background: #667eea;
    color: white;
}
/* ─── SESSION TYPE BADGES ─── */
.session-type {
    display: inline-block;
    font-size: 0.7em;
    padding: 3px 10px;
    border-radius: 12px;
    margin-top: 6px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}

.session-theory {
    background: #e3f2fd;
    color: #1565c0;
}

.session-lab {
    background: #fff3e0;
    color: #e65100;
}

.session-practical {
    background: #f3e5f5;
    color: #6a1b9a;
}

.session-tutorial {
    background: #e8f5e9;
    color: #2e7d32;
}

.session-default {
    background: #f5f5f5;
    color: #616161;
}

/* ─── BREAK CELLS ─── */
.break-cell {
    background: #fff8dc;
    font-weight: 600;
    color: #b8860b;
    font-size: 0.88em;
    letter-spacing: 0.3px;
}

/* ─── SUCCESS MESSAGE ─── */
.success-message {
    background: #d4edda;
    border: 2px solid #28a745;
    color: #155724;
    padding: 14px;
    border-radius: 10px;
    margin: 22px 0 10px;
    text-align: center;
    font-weight: 600;
}

/* ─── STATISTICS SECTION ─── */
.stats-section {
    background: #f8f9fa;
    padding: 24px;
    border-radius: 12px;
    margin: 24px 0;
}

.stats-section h3 {
    color: #667eea;
    margin-bottom: 18px;
    font-size: 1.3em;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 18px;
    margin-top: 16px;
}

.stat-card {
    background: white;
    padding: 18px;
    border-radius: 10px;
    border: 2px solid #e0e0e0;
}

.stat-card h4 {
    color: #667eea;
    margin-bottom: 14px;
    font-size: 1.05em;
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 8px;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid #f0f0f0;
}

.stat-item:last-child {
    border-bottom: none;
}

.stat-label {
    color: #555;
    font-size: 0.92em;
}

.stat-value {
    color: #667eea;
    font-weight: 700;
    font-size: 0.95em;
}

.mapping-table {
    width: 100%;
    margin-top: 10px;
    font-size: 0.88em;
}

.mapping-table td {
    padding: 8px;
    border: 1px solid #e0e0e0;
}

/* ─── LEGEND ─── */
.legend {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
    justify-content: center;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82em;
    color: #555;
}

.legend-dot {
    width: 14px;
    height: 14px;
    border-radius: 4px;
}

/* ─── PRINT STYLES ─── */
@media print {
    body {
        background: #fff;
        padding: 0;
    }

    .container {
        box-shadow: none;
        border-radius: 0;
    }

    .input-section,
    .print-btn,
    .success-message {
        display: none !important;
    }

    .header {
        padding: 18px;
    }

    table {
        font-size: 0.82em;
    }

    th,
    td {
        padding: 8px 5px;
    }
}

/* ─── RESPONSIVE DESIGN ─── */
@media (max-width: 768px) {
    .header h1 {
        font-size: 1.6em;
    }

    table {
        font-size: 0.78em;
    }

    th,
    td {
        padding: 8px 4px;
    }

    .pair-row {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}

.slot-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #eef2ff;
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 10px;
}

#timeSlotEditor {
    margin-top: 10px;
}
.slot-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #eef2ff;
    padding: 14px 18px;
    border-radius: 12px;
    margin-top: 15px;
}

/* Button container */
.slot-actions {
    display: flex;
    gap: 10px;
}

/* ADD BUTTON */
.btn-add {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: white;
    border: none;
    padding: 8px 14px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
}

.btn-add:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 10px rgba(34,197,94,0.4);
}

/* REMOVE BUTTON */
.btn-remove {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
    border: none;
    padding: 8px 14px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
}

.btn-remove:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 10px rgba(239,68,68,0.4);
}
table {
    border-collapse: collapse;
}

th {
    background: #6366f1;
    color: white;
}

td {
    font-size: 12px;
}

td[rowspan] {
    vertical-align: middle;
}
td[rowspan] {
    text-align: center;
    vertical-align: middle;
    font-weight: bold;
    background: #f3f4f6;
}
.day-cell {
    font-weight: 700;
    font-size: 15px;
    color: #1f2937;
    background: #e0e7ff; /* light blue highlight */
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.btn {
    background: #4f46e5;
    color: white;
    padding: 10px 18px;
    border: none;
    border-radius: 8px;
    margin: 5px;
    cursor: pointer;
    font-weight: bold;
}

.btn:hover {
    background: #3730a3;
}

/* print css */
body {
    font-family: Arial;
    padding: 10px;
}

/* 🔥 MAIN FIX: scale content */
@media print {

    table {
        width: 100%;
        border-collapse: collapse;
    }

    th, td {
        border: 1px solid #000;
        padding: 4px;
        font-size: 10px;   /* 👈 reduce text */
    }

    th {
        background: #6366f1;
        color: white;
    }

    h2 {
        font-size: 16px;
        margin-bottom: 5px;
    }
}

table {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;
}

td {
    word-wrap: break-word;
}

/* 🔘 Common Button Style (Same for all) */
.btn {
    padding: 10px 18px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    color: white;
    
    /* 🔥 Same color for all */
    background: linear-gradient(135deg, #6366f1, #8b5cf6);

    transition: all 0.3s ease;
}

/* ✨ Hover Effect */
.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(99, 102, 241, 0.4);
}

/* 🔽 Click Effect */
.btn:active {
    transform: scale(0.95);
}

/* ❌ Remove outline */
.btn:focus {
    outline: none;
}

.btn:active {
    transform: scale(0.95);
}

.btn:focus {
    outline: none;
}