/* ==========================================================================
   Exam Portal Core Design System
   ========================================================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700;900&display=swap');

:root {
    --font-heading: 'Roboto', sans-serif;
    --font-body: 'Roboto', sans-serif;

    /* Light Theme Variables (Soft warm grey & dark yellow) */
    --bg-gradient: linear-gradient(135deg, #f1f3f5 0%, #e9ecef 100%);
    --bg-card: rgba(255, 255, 255, 0.85);
    --border-color: rgba(206, 212, 218, 0.7);
    --text-primary: #212529;
    --text-secondary: #495057;
    --primary-color: #d48a00;
    --primary-hover: #b87800;
    --primary-light: rgba(212, 138, 0, 0.12);
    --success-color: #198754;
    --success-light: rgba(25, 135, 84, 0.12);
    --danger-color: #dc3545;
    --danger-light: rgba(220, 53, 69, 0.12);
    --warning-color: #fd7e14;
    --warning-light: rgba(253, 126, 20, 0.12);
    --info-color: #0dcaf0;
    --info-light: rgba(13, 202, 240, 0.12);
    --sidebar-bg: rgba(248, 249, 250, 0.8);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 6px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.12);
    --glass-blur: blur(8px);
    --btn-text-color: #ffffff;
}

[data-theme="dark"] {
    /* Dark Theme Variables (Dark grey & dark yellow) */
    --bg-gradient: linear-gradient(135deg, #121212 0%, #1e1e1e 100%);
    --bg-card: rgba(30, 30, 30, 0.85);
    --border-color: rgba(75, 75, 75, 0.5);
    --text-primary: #f5f5f5;
    --text-secondary: #a5a5a5;
    --primary-color: #e5a900;
    --primary-hover: #cca000;
    --primary-light: rgba(229, 169, 0, 0.15);
    --success-color: #10b981;
    --success-light: rgba(16, 185, 129, 0.18);
    --danger-color: #ef4444;
    --danger-light: rgba(239, 68, 68, 0.18);
    --warning-color: #ffb800;
    --warning-light: rgba(255, 184, 0, 0.18);
    --info-color: #0284c7;
    --info-light: rgba(2, 132, 199, 0.18);
    --sidebar-bg: rgba(20, 20, 20, 0.8);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 6px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.5);
}

/* Base Styles */
body {
    font-family: var(--font-body);
    font-size: 0.85rem; /* Clean small font size */
    line-height: 1.45;
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    transition: background 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.4rem;
}
h1 { font-size: 1.5rem; }
h2 { font-size: 1.3rem; }
h3 { font-size: 1.15rem; }
h4 { font-size: 1.05rem; }
h5 { font-size: 0.9rem; }
h6 { font-size: 0.8rem; }

/* Custom Glassmorphism Containers */
.glass-panel {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: 12px; /* slightly smaller radius for cleaner aesthetic */
    box-shadow: var(--shadow-md);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.3s ease, border-color 0.3s ease;
}

.glass-panel-hover:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* Top Navbar styling */
.exam-navbar {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

/* Custom Option Selector Radio Cards */
.option-wrapper {
    margin-bottom: 1rem;
}

.option-card {
    display: flex;
    align-items: center;
    padding: 1.1rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-card);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.option-card:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
    transform: translateX(5px);
}

/* Hide native radio button */
.option-card input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

/* Letter badge (A, B, C, D) */
.option-letter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--border-color);
    color: var(--text-secondary);
    font-weight: 700;
    margin-right: 1rem;
    transition: all 0.2s ease;
    font-family: var(--font-heading);
}

/* Styled Selected State */
.option-card.selected {
    border-color: var(--primary-color);
    background: var(--primary-light);
    box-shadow: 0 0 10px rgba(79, 70, 229, 0.15);
}

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

/* Question Palette Navigation Buttons */
.nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
    gap: 10px;
}

.nav-btn {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    font-weight: 600;
    font-family: var(--font-heading);
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
    border: 2px solid transparent;
}

/* Question State Color Codes */
.nav-btn.unvisited {
    background: transparent;
    border-color: var(--text-secondary);
    color: var(--text-secondary);
}

.nav-btn.unvisited:hover {
    background: var(--primary-light);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.nav-btn.unanswered {
    background: var(--danger-light);
    border-color: var(--danger-color);
    color: var(--danger-color);
}

.nav-btn.answered {
    background: var(--success-color);
    color: #ffffff;
    border-color: var(--success-color);
}

.nav-btn.marked {
    background: var(--info-color);
    color: #ffffff;
    border-color: var(--info-color);
}

.nav-btn.active {
    box-shadow: 0 0 0 3px var(--primary-color);
    transform: scale(1.1);
}

/* Timer Ring Clock */
.timer-container {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    font-family: var(--font-heading);
    padding: 6px 16px;
    border-radius: 30px;
    background: var(--primary-light);
    color: var(--primary-color);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.timer-container.warning {
    background: var(--warning-light);
    color: var(--warning-color);
    animation: pulse 1s infinite alternate;
}

.timer-container.danger {
    background: var(--danger-light);
    color: var(--danger-color);
    animation: flash 0.5s infinite alternate;
}

@keyframes pulse {
    0% { transform: scale(1); }
    100% { transform: scale(1.03); }
}

@keyframes flash {
    0% { opacity: 1; transform: scale(1.05); }
    100% { opacity: 0.8; transform: scale(0.95); }
}

/* Custom Scrollbars */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Animations */
.fade-in-slide {
    animation: fadeInSlide 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeInSlide {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Theme Switcher Button */
.theme-toggle-btn {
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.theme-toggle-btn:hover {
    background: var(--primary-light);
    color: var(--primary-color);
}

/* Progress circle on result page */
.progress-ring {
    position: relative;
    width: 150px;
    height: 150px;
}

.progress-ring__circle {
    transition: stroke-dashoffset 0.35s;
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
}

.progress-ring-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.75rem;
    font-weight: 800;
    font-family: var(--font-heading);
}

/* Result specific item review */
.review-q-card {
    border-left: 5px solid var(--border-color);
}
.review-q-card.correct {
    border-left-color: var(--success-color);
    background: var(--success-light);
}
.review-q-card.incorrect {
    border-left-color: var(--danger-color);
    background: var(--danger-light);
}
.review-q-card.skipped {
    border-left-color: var(--warning-color);
    background: var(--warning-light);
}

/* Floating shape backgrounds for index.php */
.bg-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.shape {
    position: absolute;
    filter: blur(80px);
    opacity: 0.15;
    border-radius: 50%;
}

.shape-1 {
    width: 300px;
    height: 300px;
    background: var(--primary-color);
    top: 10%;
    left: -50px;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--info-color);
    bottom: 5%;
    right: -100px;
}

/* Custom Table Design */
.custom-table {
    color: var(--text-primary);
}
.custom-table thead th {
    font-family: var(--font-heading);
    font-weight: 600;
    background-color: var(--primary-light);
    border-bottom: 2px solid var(--border-color);
    color: var(--primary-color);
}
.custom-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s ease;
}
.custom-table tbody tr:hover {
    background-color: var(--primary-light);
}

/* Responsive sidebar drawer for mobile */
@media (max-width: 991.98px) {
    .exam-sidebar {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 999;
        border-top: 1px solid var(--border-color);
        box-shadow: 0 -10px 15px -3px rgba(0, 0, 0, 0.1);
        border-radius: 16px 16px 0 0 !important;
        max-height: 50vh;
        overflow-y: auto;
    }
    body {
        padding-bottom: 55vh; /* make room for fixed bottom sheet */
    }
}

/* Bootstrap Button and Control Overrides for Gold/Yellow theme */
.btn-primary {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    color: #1a1a1a !important; /* dark text for yellow background */
    font-weight: 600;
}
.btn-primary:hover, .btn-primary:focus, .btn-primary:active {
    background-color: var(--primary-hover) !important;
    border-color: var(--primary-hover) !important;
    color: #1a1a1a !important;
}
.btn-outline-primary {
    color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
}
.btn-outline-primary:hover, .btn-outline-primary:focus, .btn-outline-primary:active {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    color: #1a1a1a !important;
}
.bg-primary {
    background-color: var(--primary-color) !important;
}
.text-primary {
    color: var(--primary-color) !important;
}
.bg-primary-light {
    background-color: var(--primary-light) !important;
}
.form-control, .form-select {
    color: var(--text-primary) !important;
}
.form-control::placeholder {
    color: var(--text-secondary) !important;
    opacity: 0.7;
}
.form-control:focus, .form-select:focus {
    background-color: var(--bg-card) !important;
    color: var(--text-primary) !important;
    border-color: var(--primary-color) !important;
    box-shadow: 0 0 0 0.25rem rgba(229, 169, 0, 0.25) !important;
}
.text-dark {
    color: var(--text-primary) !important;
}
.text-secondary {
    color: var(--text-secondary) !important;
}
.bg-light {
    background-color: var(--sidebar-bg) !important;
}
.border-light-subtle {
    border-color: var(--border-color) !important;
}
.bg-warning-light {
    background-color: var(--warning-light) !important;
}
.bg-danger-light {
    background-color: var(--danger-light) !important;
}
.bg-success-light {
    background-color: var(--success-light) !important;
}
.text-success {
    color: var(--success-color) !important;
}
.text-danger {
    color: var(--danger-color) !important;
}
.text-warning {
    color: var(--warning-color) !important;
}
.text-info {
    color: var(--info-color) !important;
}
.bg-info-light {
    background-color: var(--info-light) !important;
}
.breadcrumb-item.active {
    color: var(--text-secondary) !important;
}
.modal-content {
    background: var(--bg-card) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-primary) !important;
}
.list-group-item {
    color: var(--text-primary) !important;
    border-color: var(--border-color) !important;
}
.btn-close {
    filter: var(--theme-close-btn-filter, invert(1) grayscale(1) brightness(1.5));
}
[data-theme="light"] .btn-close {
    filter: none;
}
.form-select option {
    background-color: var(--bg-card);
    color: var(--text-primary);
}
.progress-ring-text {
    color: var(--text-primary) !important;
}