/* ========== RESET & VARIABLES ========== */
:root {
    --bg-primary: #000000;
    --bg-secondary: #1c1c1e;
    --bg-tertiary: #2c2c2e;
    --bg-quaternary: #3a3a3c;
    --bg-glass: rgba(28, 28, 30, 0.75);
    --text-primary: #ffffff;
    --text-secondary: #aeaeb2;
    --text-tertiary: #636366;
    --accent: #0a84ff;
    --accent-hover: #409cff;
    --accent-glow: rgba(10, 132, 255, 0.3);
    --danger: #ff453a;
    --success: #30d158;
    --warning: #ffd60a;
    --border: #3a3a3c;
    --border-light: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(28, 28, 30, 0.85);
    --glass-border: rgba(255, 255, 255, 0.08);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.8);
    --radius-xs: 8px;
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-2xl: 36px;
    --transition-fast: 0.15s cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition: 0.25s cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition-slow: 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

html {
    font-size: 16px;
    -webkit-tap-highlight-color: transparent;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    padding-bottom: 120px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-image: 
        radial-gradient(ellipse at top left, rgba(10, 132, 255, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at bottom right, rgba(48, 209, 88, 0.04) 0%, transparent 50%);
    background-attachment: fixed;
}

/* ========== ADMIN PANEL LAYOUT ========== */
body.admin-panel-page {
    padding: 14px;
    padding-bottom: 120px;
}

body.admin-panel-page .container {
    max-width: 680px;
}

body.admin-panel-page .container-wide {
    max-width: 1320px;
}

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-quaternary); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: #5a5a5c; }

/* ========== CONTAINER ========== */
.container {
    width: 100%;
    max-width: 560px;
    background: var(--bg-secondary);
    border-radius: var(--radius-2xl);
    padding: 32px 28px;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    border: 1px solid var(--glass-border);
    position: relative;
    animation: containerIn 0.5s ease-out;
}

@keyframes containerIn {
    from { opacity: 0; transform: translateY(16px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.container-wide {
    max-width: 1100px;
}

/* ========== TYPOGRAPHY ========== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.4;
}

h1 { font-size: 1.8rem; margin-bottom: 8px; }
h2 { font-size: 1.5rem; margin-bottom: 16px; }
h3 { font-size: 1.2rem; margin-bottom: 12px; }
h4 { font-size: 1rem; margin-bottom: 8px; }

p { color: var(--text-secondary); line-height: 1.8; margin-bottom: 12px; }

/* ========== FORM ELEMENTS ========== */
label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.9rem;
    letter-spacing: -0.01em;
}

input[type="text"],
input[type="tel"],
input[type="password"],
input[type="search"],
input[type="number"],
input[type="email"],
select,
textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    outline: none;
    transition: all var(--transition);
    appearance: none;
    -webkit-appearance: none;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--accent);
    background: var(--bg-quaternary);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

input::placeholder {
    color: var(--text-tertiary);
}

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%23aeaeb2'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 15px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    letter-spacing: -0.01em;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.1);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.btn:hover::after {
    opacity: 1;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 16px var(--accent-glow);
}
.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 6px 24px rgba(10, 132, 255, 0.4);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1.5px solid var(--border);
}
.btn-secondary:hover {
    background: var(--bg-quaternary);
    border-color: #5a5a5c;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}
.btn-success {
    background: var(--success);
    color: #000;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
    width: auto;
}

.btn-lg {
    padding: 18px 28px;
    font-size: 1.1rem;
    border-radius: var(--radius-lg);
}

/* ========== QUESTION STYLES ========== */
.question-container {
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.question-number {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 700;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.question-text {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 8px;
    direction: ltr;
    text-align: left;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: #e5e5e7;
}

.option-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
    text-align: left;
    padding: 15px 18px;
    margin: 8px 0;
    background: var(--bg-tertiary);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    direction: ltr;
    cursor: pointer;
    transition: all var(--transition);
}

.option-btn:hover {
    background: var(--bg-quaternary);
    border-color: #5a5a5c;
    transform: translateX(2px);
}

.option-btn.selected {
    border-color: var(--accent);
    background: rgba(10, 132, 255, 0.12);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.option-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--bg-quaternary);
    font-weight: 700;
    font-size: 0.85rem;
    flex-shrink: 0;
    color: var(--text-secondary);
    transition: all var(--transition);
}

.option-btn.selected .option-letter {
    background: var(--accent);
    color: #fff;
}

/* ========== PROGRESS ========== */
.progress-container {
    margin: 20px 0;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.progress-bar {
    height: 5px;
    background: var(--bg-tertiary);
    border-radius: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #5e9eff);
    border-radius: 10px;
    transition: width 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
    box-shadow: 0 0 12px var(--accent-glow);
}

/* ========== TIMER ========== */
.timer-display {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: right;
    margin-bottom: 12px;
    font-variant-numeric: tabular-nums;
    font-family: monospace;
}

/* ========== ALERTS ========== */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-error {
    background: rgba(255, 69, 58, 0.1);
    color: var(--danger);
    border: 1px solid rgba(255, 69, 58, 0.25);
}

.alert-success {
    background: rgba(48, 209, 88, 0.1);
    color: var(--success);
    border: 1px solid rgba(48, 209, 88, 0.25);
}

.alert-info {
    background: rgba(10, 132, 255, 0.1);
    color: var(--accent);
    border: 1px solid rgba(10, 132, 255, 0.25);
}

/* ========== BADGES ========== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
}

.badge-primary { background: rgba(10, 132, 255, 0.15); color: var(--accent); }
.badge-success { background: rgba(48, 209, 88, 0.15); color: var(--success); }
.badge-danger { background: rgba(255, 69, 58, 0.15); color: var(--danger); }
.badge-warning { background: rgba(255, 214, 10, 0.15); color: var(--warning); }
.badge-neutral { background: var(--bg-tertiary); color: var(--text-secondary); }

/* ========== CARDS ========== */
.card {
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    padding: 20px;
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}

/* ========== STAT GRID ========== */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 14px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    padding: 18px 16px;
    text-align: center;
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ========== TABLES ========== */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    margin-top: 16px;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    min-width: 600px;
}

thead th {
    background: var(--bg-tertiary);
    padding: 14px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.78rem;
    text-transform: uppercase;
    border-bottom: 1px solid var(--border);
}

tbody td {
    padding: 14px;
    border-bottom: 1px solid var(--border);
}

tbody tr:hover {
    background: rgba(255,255,255,0.02);
}

/* ========== FILTER BAR ========== */
.filter-bar {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 20px;
    background: var(--bg-tertiary);
    padding: 14px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    align-items: center;
}

.filter-bar input,
.filter-bar select {
    flex: 1;
    min-width: 140px;
    margin-bottom: 0;
    padding: 12px 14px;
}

.filter-bar .btn {
    width: auto;
}

/* ========== PAGINATION ========== */
.pagination {
    display: flex;
    gap: 6px;
    justify-content: center;
    margin-top: 24px;
    flex-wrap: wrap;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    padding: 0 10px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.pagination a:hover {
    background: var(--bg-quaternary);
}

.pagination .active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

/* ========== macOS DOCK ========== */
.dock-container {
    position: fixed;
    bottom: 22px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 999;
    pointer-events: none;
}

.dock {
    display: flex;
    gap: 4px;
    padding: 10px 16px;
    background: var(--glass-bg);
    backdrop-filter: blur(40px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    pointer-events: all;
}

.dock-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    padding: 10px 14px;
    border-radius: 18px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.25s;
    font-size: 0.7rem;
    white-space: nowrap;
}

.dock-item:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.06);
    transform: translateY(-8px) scale(1.1);
}

.dock-item.active {
    color: var(--accent);
}

.dock-icon {
    font-size: 1.5rem;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    body { padding: 12px; padding-bottom: 110px; }
    .container { padding: 24px 16px; }
    .stat-grid { grid-template-columns: repeat(2, 1fr); }
    .dock-item { padding: 8px 10px; min-width: 44px; }
    .dock-label { display: none; }
    .dock-icon { font-size: 1.3rem; }
}

/* ========== ANIMATIONS ========== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in-up {
    animation: fadeInUp 0.45s ease-out;
}

/* ========== UTILITIES ========== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.ltr { direction: ltr; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.hidden { display: none; }

/* ========== RESEARCH ANALYSIS CHARTS ========== */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 20px;
    margin: 24px 0;
}

.chart-card {
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--border);
    text-align: center;
}

.canvas-container {
    background: #1c1c1e;
    border-radius: var(--radius-md);
    padding: 16px;
    margin: 8px 0;
    border: 1px solid var(--border);
}

.result-card {
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin: 16px 0;
    border: 1px solid var(--border);
}

.distractor-bar {
    height: 28px;
    border-radius: 14px;
    margin: 4px 0;
    min-width: 40px;
    display: flex;
    align-items: center;
    padding: 0 12px;
    font-size: 0.78rem;
    font-weight: 600;
    color: #fff;
}

.bar-correct-choice { background: linear-gradient(90deg, #30d158, #1ea83a); }
.bar-a { background: linear-gradient(90deg, #0a84ff, #0070df); }
.bar-b { background: linear-gradient(90deg, #ff9f0a, #e68900); }
.bar-c { background: linear-gradient(90deg, #5e5ce6, #4a48c9); }
.bar-d { background: linear-gradient(90deg, #ff375f, #e02d50); }

.summary-banner {
    background: linear-gradient(135deg, rgba(10,132,255,0.1), rgba(48,209,88,0.1));
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin: 20px 0;
    text-align: center;
}

.print-btn {
    position: fixed;
    bottom: 100px;
    right: 24px;
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 12px 20px;
    border-radius: 30px;
    cursor: pointer;
    z-index: 100;
    font-size: 0.85rem;
    font-weight: 600;
}

@media print {
    .dock-container, .print-btn, .no-return-note { display: none !important; }
    body { background: #fff; color: #000; }
    .container, .chart-card, .result-card, .stat-card { background: #f9f9f9; border: 1px solid #ddd; }
}