/* ══════════════════════════════════════════════════════════════
   ระบบทำข้อสอบออนไลน์ โรงเรียนบ้านแป้นสามัคคีราษฎร์บำรุง
   Subdomain: bptest.banpan.ac.th
   ══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Prompt:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Sarabun:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
    --primary: #1e3a8a;          /* Deep Blue */
    --primary-light: #3b82f6;    /* Bright Blue */
    --primary-dark: #0f172a;     /* Dark Slate */
    --accent: #f59e0b;           /* Gold / Amber */
    --accent-hover: #d97706;
    --success: #10b981;          /* Emerald Green */
    --success-light: #d1fae5;
    --danger: #ef4444;           /* Red */
    --danger-light: #fee2e2;
    --warning: #f97316;
    --bg-main: #f1f5f9;
    --bg-card: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.05);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Prompt', 'Sarabun', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ─── Top Header & School Brand ─── */
.school-header {
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
    color: #ffffff;
    padding: 1rem 1.5rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.brand-wrapper {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    color: inherit;
}

.school-logo {
    width: 54px;
    height: 54px;
    object-fit: contain;
    background: #ffffff;
    border-radius: 50%;
    padding: 3px;
    box-shadow: 0 0 10px rgba(255,255,255,0.2);
}

.brand-info h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: #ffffff;
    line-height: 1.3;
}

.brand-info p {
    font-size: 0.85rem;
    color: #93c5fd;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.btn-header-admin {
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.25);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    text-decoration: none;
}

.btn-header-admin:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
}

/* ─── Main Container ─── */
.main-wrapper {
    flex: 1;
    max-width: 1000px;
    width: 100%;
    margin: 1.5rem auto;
    padding: 0 1rem;
}

/* ─── Card Components ─── */
.bptest-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    padding: 2rem;
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
}

.card-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

/* ─── Registration Form Elements ─── */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.form-label .required {
    color: var(--danger);
}

.form-input, .form-select {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    border: 1.5px solid var(--border-color);
    background-color: #f8fafc;
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-main);
    transition: all 0.2s ease;
    outline: none;
}

.form-input:focus, .form-select:focus {
    border-color: var(--primary-light);
    background-color: #ffffff;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-input::placeholder {
    color: #94a3b8;
}

/* ─── Subject Grid & Radio Selection ─── */
.subject-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-top: 0.75rem;
}

.subject-card-option {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    cursor: pointer;
    background: #ffffff;
    transition: all 0.2s ease;
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    position: relative;
}

.subject-card-option:hover {
    border-color: #93c5fd;
    background-color: #eff6ff;
    transform: translateY(-2px);
}

.subject-card-option.selected {
    border-color: var(--primary);
    background-color: #eff6ff;
    box-shadow: 0 0 0 2px var(--primary);
}

.subject-card-option input[type="radio"] {
    margin-top: 0.25rem;
    width: 1.2rem;
    height: 1.2rem;
    accent-color: var(--primary);
}

.subject-details {
    flex: 1;
}

.subject-title {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--primary-dark);
    margin-bottom: 0.2rem;
}

.subject-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.subject-badge {
    background: #e2e8f0;
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.subject-badge.primary {
    background: #dbeafe;
    color: #1e40af;
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: inherit;
    font-weight: 600;
    font-size: 1rem;
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
    color: #ffffff;
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #1e40af 0%, #1d4ed8 100%);
    box-shadow: 0 6px 14px rgba(37, 99, 235, 0.35);
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, #059669 0%, #10b981 100%);
    color: #ffffff;
    box-shadow: 0 4px 10px rgba(16, 185, 129, 0.25);
}

.btn-success:hover {
    background: linear-gradient(135deg, #047857 0%, #059669 100%);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--border-color);
    color: var(--text-main);
}

.btn-outline:hover {
    background: #f8fafc;
    border-color: #94a3b8;
}

.btn-lg {
    padding: 1rem 2.25rem;
    font-size: 1.15rem;
    border-radius: var(--radius-md);
}

.btn-full {
    width: 100%;
}

/* ─── Active Exam Room UI ─── */
.exam-header-bar {
    background: #ffffff;
    border-radius: var(--radius-md);
    padding: 1rem 1.5rem;
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.student-badge-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.student-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: #dbeafe;
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}

.exam-meta-block {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.timer-pill {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fde68a;
    padding: 0.4rem 0.85rem;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* ─── Question Navigation Grid ─── */
.question-nav-container {
    background: #ffffff;
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.nav-grid-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.nav-grid-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.question-bubbles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(42px, 1fr));
    gap: 0.5rem;
}

.bubble-btn {
    height: 40px;
    border-radius: var(--radius-sm);
    border: 1.5px solid var(--border-color);
    background: #f8fafc;
    color: var(--text-main);
    font-family: inherit;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bubble-btn:hover {
    border-color: var(--primary-light);
    background: #eff6ff;
}

.bubble-btn.active {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.3);
}

.bubble-btn.answered {
    background: #10b981;
    color: #ffffff;
    border-color: #10b981;
}

.bubble-btn.answered.active {
    background: #047857;
    border-color: #047857;
    box-shadow: 0 0 0 3px #a7f3d0;
}

/* ─── Question Card & Choices ─── */
.question-card {
    background: #ffffff;
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.question-number-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
}

.question-badge {
    background: #dbeafe;
    color: #1e40af;
    font-weight: 700;
    font-size: 0.95rem;
    padding: 0.35rem 0.9rem;
    border-radius: var(--radius-full);
}

.question-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: #0f172a;
    line-height: 1.6;
    margin-bottom: 1.75rem;
}

.choices-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.choice-option {
    display: flex;
    align-items: center;
    padding: 1.15rem 1.25rem;
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    background: #ffffff;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.choice-option:hover {
    border-color: #93c5fd;
    background: #f8fafc;
    transform: translateX(4px);
}

.choice-option.selected {
    border-color: var(--primary);
    background: #eff6ff;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.15);
}

.choice-letter {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: #e2e8f0;
    color: #334155;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.05rem;
    margin-right: 1.25rem;
    flex-shrink: 0;
    transition: all 0.2s ease;
}

.choice-option.selected .choice-letter {
    background: var(--primary);
    color: #ffffff;
}

.choice-label-text {
    font-size: 1.1rem;
    color: var(--text-main);
    flex: 1;
}

/* ─── Question Navigation Actions ─── */
.exam-nav-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

/* ─── Result Screen ─── */
.result-container {
    text-align: center;
}

.result-celebrate-badge {
    display: inline-block;
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
    animation: bounceIn 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes bounceIn {
    0% { transform: scale(0.3); opacity: 0; }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

.result-score-circle {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 170px;
    height: 170px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    color: #ffffff;
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
    margin: 1.5rem auto;
}

.result-score-circle.fail {
    background: linear-gradient(135deg, #b91c1c 0%, #ef4444 100%);
    box-shadow: 0 10px 25px rgba(239, 68, 68, 0.3);
}

.result-score-number {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1;
}

.result-score-total {
    font-size: 1rem;
    opacity: 0.85;
}

.result-info-box {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin: 1.5rem 0;
    text-align: left;
}

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

.result-stat-item {
    display: flex;
    flex-direction: column;
}

.result-stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.result-stat-val {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
}

/* ─── Review Section (เฉลยข้อสอบ) ─── */
.review-item {
    background: #ffffff;
    border-radius: var(--radius-md);
    border: 1.5px solid var(--border-color);
    padding: 1.5rem;
    margin-bottom: 1.25rem;
    text-align: left;
}

.review-item.correct {
    border-left: 6px solid var(--success);
}

.review-item.wrong {
    border-left: 6px solid var(--danger);
}

.review-explanation {
    background: #f0fdf4;
    border: 1px dashed #86efac;
    border-radius: var(--radius-sm);
    padding: 0.85rem 1rem;
    margin-top: 1rem;
    font-size: 0.95rem;
    color: #166534;
}

.review-item.wrong .review-explanation {
    background: #fef2f2;
    border-color: #fca5a5;
    color: #991b1b;
}

/* ─── Teacher Dashboard ─── */
.dashboard-filter-bar {
    background: #ffffff;
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 1rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: #ffffff;
    border-radius: var(--radius-md);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: #eff6ff;
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-content h3 {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.stat-content p {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.2;
}

/* ─── Table ─── */
.table-responsive {
    overflow-x: auto;
    background: #ffffff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.95rem;
}

.data-table th {
    background: #f8fafc;
    color: #475569;
    font-weight: 600;
    padding: 0.85rem 1rem;
    border-bottom: 2px solid var(--border-color);
    white-space: nowrap;
}

.data-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
}

.data-table tr:hover {
    background: #f8fafc;
}

/* ─── Modal ─── */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 1rem;
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    background: #ffffff;
    border-radius: var(--radius-md);
    max-width: 550px;
    width: 100%;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
    animation: modalIn 0.25s ease-out;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
    background: #f8fafc;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-body {
    padding: 1.5rem;
    max-height: 75vh;
    overflow-y: auto;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background: #f8fafc;
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* ─── Footer ─── */
.school-footer {
    background: #ffffff;
    border-top: 1px solid var(--border-color);
    padding: 1.5rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: auto;
}

/* ─── Print Stylesheet for Official Reports ─── */
@media print {
    .school-header, .header-actions, .dashboard-filter-bar, .btn, .school-footer, .no-print {
        display: none !important;
    }

    body {
        background: #ffffff !important;
        color: #000000 !important;
        font-family: 'Sarabun', 'TH Sarabun New', sans-serif !important;
    }

    .main-wrapper {
        max-width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
    }

    .bptest-card, .table-responsive {
        box-shadow: none !important;
        border: none !important;
        padding: 0 !important;
    }

    .print-only {
        display: block !important;
    }

    .data-table th, .data-table td {
        border: 1px solid #000000 !important;
        padding: 6px !important;
        font-size: 13px !important;
    }

    .data-table th {
        background: #f0f0f0 !important;
    }
}

.print-only {
    display: none;
}