/* =============================================
   OTutor Quiz v5.0 - COMPLETE Stylesheet
   Covers: index.php (quiz), admin.php, create-quiz.php
   ============================================= */

/* CSS Variables */
:root {
    --primary: #6C63FF;
    --primary-dark: #5A52D5;
    --primary-light: #8B83FF;
    --secondary: #FF6584;
    --accent: #43E97B;
    --bg: #F0F2F5;
    --bg-card: #FFFFFF;
    --text: #2D3436;
    --text-light: #636E72;
    --text-lighter: #B2BEC3;
    --text-muted: #95a5a6;
    --border: #DFE6E9;
    --success: #00B894;
    --success-dark: #00a381;
    --danger: #E17055;
    --error-dark: #d63031;
    --warning: #FDCB6E;
    --skip-dark: #e17055;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif, 'Noto Sans Bengali';
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* =============================================
   LAYOUT
   ============================================= */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 16px;
}

.container-wide {
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px;
}

/* =============================================
   INDEX.PHP — QUIZ PAGE STYLES
   ============================================= */

/* App Container */
.app-container {
    max-width: 480px;
    margin: 0 auto;
    padding: 16px;
    min-height: 100vh;
}

/* Brand Logo */
.brand-logo {
    text-align: center;
    margin-bottom: 16px;
}
.brand-logo img {
    height: 48px;
    border-radius: 8px;
}

/* Login / Quiz Select Screen */
.login-screen {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    box-shadow: var(--shadow);
    margin-bottom: 16px;
}
.login-screen h2 {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--primary-dark);
    text-align: center;
    margin-bottom: 12px;
}

/* Quiz Name Display */
.quiz-name-display {
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px dashed var(--border);
}

/* Admin/Creator Links */
.admin-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.85rem;
    transition: var(--transition);
    border: 1.5px solid var(--border);
    background: var(--bg-card);
    width: 100%;
    justify-content: center;
    margin-top: 8px;
}
.admin-link:hover {
    border-color: var(--primary);
    background: rgba(108,99,255,0.05);
}
.creator-link {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
}
.creator-link:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(108,99,255,0.4);
}

/* Quiz Select List */
.quiz-select-list {
    margin-bottom: 12px;
}
.quiz-select-card {
    display: flex;
    align-items: center;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    background: var(--bg);
    margin-bottom: 8px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}
.quiz-select-card:hover {
    border-color: var(--primary);
    background: white;
    box-shadow: var(--shadow);
}
.quiz-select-card .qsc-info {
    flex: 1;
}
.quiz-select-card .qsc-info h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
}
.quiz-select-card .qsc-info p {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 2px;
}
.quiz-select-card .qsc-arrow {
    color: var(--primary);
    font-size: 1.1rem;
}

/* Subject Headers in Quiz Select */
.subject-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 8px;
    margin-top: 16px;
}
.subject-header:first-child {
    margin-top: 0;
}
.subject-icon {
    font-size: 1.1rem;
}
.subject-count {
    margin-left: auto;
    background: rgba(255,255,255,0.2);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
}

/* Warning Banner (Duplicate) */
.warning-banner {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 14px;
    background: #FFF3CD;
    border: 1.5px solid #FFEEBA;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 0.85rem;
    color: #856404;
}
.warning-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}
.warning-content strong {
    display: block;
    margin-bottom: 2px;
}

/* Input Groups */
.input-group {
    margin-bottom: 14px;
}
.input-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
    font-size: 0.9rem;
}
.input-wrapper {
    display: flex;
    align-items: center;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: white;
    transition: var(--transition);
    overflow: hidden;
}
.input-wrapper:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(108,99,255,0.15);
}
.input-wrapper.correct {
    border-color: var(--success);
    box-shadow: 0 0 0 3px rgba(0,184,148,0.15);
}
.input-wrapper.wrong {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(225,112,85,0.15);
}
.input-field {
    flex: 1;
    padding: 12px 14px;
    border: none;
    font-size: 1rem;
    background: transparent;
    color: var(--text);
    outline: none;
    font-family: inherit;
}

/* Microphone Button */
.mic-btn {
    background: none;
    border: none;
    padding: 10px 12px;
    cursor: pointer;
    color: var(--text-light);
    transition: var(--transition);
    display: flex;
    align-items: center;
}
.mic-btn:hover {
    color: var(--primary);
}
.mic-btn.listening {
    color: var(--danger);
    animation: pulse 1s ease-in-out infinite;
}

/* Buttons */
.start-btn, .next-btn {
    width: 100%;
    padding: 14px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    color: white;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    box-shadow: 0 4px 15px rgba(108,99,255,0.3);
}
.start-btn:hover, .next-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(108,99,255,0.4);
}
.start-btn:disabled, .next-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}
.btn-gradient {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}
.submitted-state {
    opacity: 0.6;
}
.next-btn {
    margin-top: 16px;
}

/* Back Button */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.85rem;
    transition: var(--transition);
    border: 1.5px solid var(--border);
    background: var(--bg-card);
}
.back-btn:hover {
    border-color: var(--primary);
    background: rgba(108,99,255,0.05);
}

/* Login Bottom Links */
.login-bottom-links {
    text-align: center;
    margin-top: 16px;
}
.login-bottom-links .admin-link {
    width: auto;
    display: inline-flex;
}

/* =============================================
   QUIZ SCREEN
   ============================================= */

/* Header with Progress & Timer */
.header {
    background: var(--bg-card);
    padding: 12px 0;
    margin-bottom: 12px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.progress-dots {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    padding: 8px 12px;
}
.progress-dot {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 700;
    border: 2px solid var(--border);
    background: white;
    color: var(--text-light);
    transition: var(--transition);
    cursor: pointer;
}
.progress-dot.active, .progress-dot.current {
    border-color: var(--primary);
    background: var(--primary);
    color: white;
    transform: scale(1.15);
    box-shadow: 0 0 0 3px rgba(108,99,255,0.3);
}
.progress-dot.answered, .progress-dot.correct {
    border-color: var(--success);
    background: var(--success);
    color: white;
}
.progress-dot.wrong {
    border-color: var(--danger);
    background: var(--danger);
    color: white;
}
.progress-dot.skipped {
    border-color: var(--warning);
    background: var(--warning);
    color: var(--text);
}
.quiz-timer {
    text-align: center;
    padding: 8px;
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: 2px;
}

/* Question Counter */
.question-counter {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 600;
    margin-bottom: 8px;
}

/* Question Box */
.question-box {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px 20px;
    box-shadow: var(--shadow);
    margin-bottom: 16px;
    min-height: 80px;
}
.question-box h1 {
    font-size: 1.15rem;
    font-weight: 600;
    line-height: 1.8;
    color: var(--text);
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* Answer Area (Short Answer) */
.answer-area {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 16px;
}
.answer-label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text);
    margin-bottom: 10px;
}
.answer-input-wrapper {
    display: flex;
    align-items: center;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: white;
    transition: var(--transition);
    overflow: hidden;
}
.answer-input-wrapper:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(108,99,255,0.15);
}
.answer-input-wrapper.correct {
    border-color: var(--success);
    box-shadow: 0 0 0 3px rgba(0,184,148,0.15);
}
.answer-input-wrapper.wrong {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(225,112,85,0.15);
}
.answer-input {
    flex: 1;
    padding: 14px 16px;
    border: none;
    font-size: 1.2rem;
    font-weight: 600;
    text-align: center;
    background: transparent;
    color: var(--text);
    outline: none;
    font-family: inherit;
}
.answer-input:disabled {
    background: var(--bg);
    color: var(--text-light);
}
.submit-answer-btn {
    background: linear-gradient(135deg, var(--success), #00A381);
    border: none;
    color: white;
    padding: 14px 18px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}
.submit-answer-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, #00A381, #009B74);
}
.submit-answer-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
.answer-hint {
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-lighter);
    margin-top: 8px;
}

/* Feedback Message */
.feedback-msg {
    margin-top: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: fadeInUp 0.3s ease;
}
.feedback-msg.correct {
    background: rgba(0,184,148,0.1);
    color: var(--success-dark);
    border: 1.5px solid var(--success);
}
.feedback-msg.wrong {
    background: rgba(225,112,85,0.1);
    color: var(--error-dark);
    border: 1.5px solid var(--danger);
}

/* MCQ Area */
.mcq-area {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 16px;
}
.mcq-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* MCQ Option Buttons (index.php style) */
.mcq-option-btn {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: white;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    color: var(--text);
    text-align: left;
    font-family: inherit;
}
.mcq-option-btn:hover:not(:disabled) {
    border-color: var(--primary-light);
    background: rgba(108,99,255,0.04);
}
.mcq-option-btn .option-key {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    margin-right: 12px;
    color: var(--primary);
    flex-shrink: 0;
}
.mcq-option-btn .option-text {
    flex: 1;
    font-weight: 500;
}
.mcq-option-btn.option-disabled {
    cursor: default;
    opacity: 0.85;
}
.mcq-option-btn.option-correct {
    border-color: var(--success) !important;
    background: rgba(0,184,148,0.1) !important;
}
.mcq-option-btn.option-correct .option-key {
    background: var(--success);
    color: white;
}
.mcq-option-btn.option-wrong {
    border-color: var(--danger) !important;
    background: rgba(225,112,85,0.1) !important;
}
.mcq-option-btn.option-wrong .option-key {
    background: var(--danger);
    color: white;
}

/* MCQ Feedback */
#mcqFeedbackMsg {
    margin-top: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: fadeInUp 0.3s ease;
}
#mcqFeedbackMsg.correct {
    background: rgba(0,184,148,0.1);
    color: var(--success-dark);
    border: 1.5px solid var(--success);
}
#mcqFeedbackMsg.wrong {
    background: rgba(225,112,85,0.1);
    color: var(--error-dark);
    border: 1.5px solid var(--danger);
}

/* =============================================
   RESULT SCREEN
   ============================================= */
.result-screen {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    box-shadow: var(--shadow);
    animation: fadeInUp 0.5s ease;
}
.result-screen h2 {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text);
    text-align: center;
    margin-bottom: 20px;
}
.result-trophy {
    font-size: 3.5rem;
    text-align: center;
    margin-bottom: 8px;
    animation: fadeInUp 0.3s ease;
}

/* Result Summary */
.result-summary {
    text-align: center;
    margin-bottom: 20px;
}
.result-participant {
    margin-bottom: 16px;
}
.result-participant .label-muted {
    font-size: 0.8rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}
.result-participant h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text);
}
.result-participant .phone-text {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Time Info Card */
.time-info-card {
    background: var(--bg);
    border-radius: var(--radius-sm);
    padding: 14px;
    margin-bottom: 20px;
    display: inline-block;
    min-width: 260px;
}
.time-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 0;
    font-size: 0.9rem;
}
.time-row.total-row {
    border-top: 1px dashed var(--border);
    margin-top: 4px;
    padding-top: 8px;
    font-weight: 700;
}
.time-label {
    color: var(--text-light);
}
.time-value {
    font-weight: 600;
    color: var(--text);
}

/* Final Score */
.final-score {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--primary);
    text-align: center;
    line-height: 1;
    margin-bottom: 4px;
    text-shadow: 0 2px 10px rgba(108,99,255,0.2);
}
.score-subtitle {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 20px;
}

/* Stats Row */
.stats-row {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}
.stat-box {
    flex: 1;
    text-align: center;
    padding: 12px 8px;
    border-radius: var(--radius-sm);
    background: var(--bg);
}
.stat-box .stat-value {
    font-size: 1.5rem;
    font-weight: 800;
}
.stat-box .stat-label {
    font-size: 0.75rem;
    color: var(--text-light);
    font-weight: 500;
}
.stat-box.stat-correct .stat-value { color: var(--success); }
.stat-box.stat-wrong .stat-value { color: var(--danger); }
.stat-box.stat-skipped .stat-value { color: var(--warning); }

/* Attempt Info */
.attempt-info {
    text-align: center;
    margin-bottom: 16px;
}
.attempt-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--warning), #F9A825);
    color: var(--text);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
}
.attempt-note {
    display: block;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 4px;
}

/* WhatsApp Share Button */
.whatsapp-btn {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: var(--radius-sm);
    background: #25D366;
    color: white;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
    font-family: inherit;
}
.whatsapp-btn:hover {
    background: #1EBE57;
    transform: translateY(-1px);
}
.whatsapp-icon {
    width: 22px;
    height: 22px;
}

/* Review Header */
.review-header {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--border);
}

/* Review List */
.review-list {
    margin-bottom: 20px;
}
.review-item {
    padding: 14px;
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    animation: fadeInUp 0.3s ease;
}
.review-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
    margin-top: 2px;
}
.review-content {
    flex: 1;
}
.review-q-num {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}
.review-question {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 4px;
}
.review-answer {
    font-size: 0.82rem;
    color: var(--text-light);
}
.review-user {
    margin-bottom: 2px;
}
.ans-correct {
    color: var(--success);
    font-weight: 600;
}
.ans-wrong {
    color: var(--danger);
    font-weight: 600;
}
.ans-skipped {
    color: var(--warning);
    font-weight: 600;
}
.review-correct-line {
    color: var(--text-light);
}
.review-points {
    font-size: 0.78rem;
    color: var(--text-lighter);
    margin-top: 2px;
}

/* Review States */
.review-correct {
    background: rgba(0,184,148,0.06);
    border-left: 4px solid var(--success);
}
.review-wrong {
    background: rgba(225,112,85,0.06);
    border-left: 4px solid var(--danger);
}
.review-skipped {
    background: rgba(253,203,110,0.06);
    border-left: 4px solid var(--warning);
}

/* Loading Spinner */
.loading-spinner {
    text-align: center;
    padding: 20px;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Shake Animation */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}
.shake {
    animation: shake 0.4s ease;
}

/* =============================================
   ADMIN.PHP — PREMIUM ADMIN DASHBOARD v8
   ============================================= */

.admin-body {
    background: #f0f2f8;
    margin: 0;
    padding: 0;
    font-family: 'Inter', 'Nunito', 'Segoe UI', sans-serif;
}
.admin-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px 40px;
}

/* ---- Top Navigation Bar ---- */
.top-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.06);
    position: sticky;
    top: 0;
    z-index: 100;
    flex-wrap: wrap;
    gap: 12px;
}
.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}
.nav-logo {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, #6C63FF, #8B83FF);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(108,99,255,0.35);
}
.nav-title {
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-brand-name {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.3px;
}
.nav-badge {
    background: linear-gradient(135deg, #6C63FF, #8B83FF);
    color: white;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}
.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 10px;
    text-decoration: none;
    color: var(--text);
    font-weight: 600;
    font-size: 0.82rem;
    transition: all 0.25s ease;
    border: 1.5px solid var(--border);
    background: white;
}
.nav-btn:hover {
    border-color: #6C63FF;
    color: #6C63FF;
    box-shadow: 0 2px 8px rgba(108,99,255,0.15);
}
.nav-btn-primary {
    background: linear-gradient(135deg, #6C63FF, #5A52D5);
    color: white;
    border: none;
    box-shadow: 0 4px 12px rgba(108,99,255,0.35);
}
.nav-btn-primary:hover {
    background: linear-gradient(135deg, #5A52D5, #4A42C5);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(108,99,255,0.45);
}

/* ---- Dashboard Header ---- */
.dash-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0 16px;
}
.dash-greeting {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.5px;
}
.dash-date {
    font-size: 0.88rem;
    color: var(--text-light);
    margin-top: 2px;
}
.live-clock {
    font-family: 'Inter', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: #6C63FF;
    background: rgba(108,99,255,0.08);
    padding: 8px 18px;
    border-radius: 12px;
    letter-spacing: 2px;
}

/* ---- Premium Stat Cards ---- */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}
@media (max-width: 900px) {
    .stat-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 600px) {
    .stat-grid { grid-template-columns: repeat(2, 1fr); }
}
.stat-card {
    position: relative;
    background: white;
    border-radius: 16px;
    padding: 22px 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
    cursor: default;
}
.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}
.stat-card-bg-icon {
    position: absolute;
    right: -8px;
    bottom: -8px;
    pointer-events: none;
}
.stat-card-content {
    position: relative;
    z-index: 1;
}
.stat-icon-wrap {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
}
.stat-number {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 4px;
    letter-spacing: -0.5px;
}
.stat-label {
    font-size: 0.78rem;
    color: var(--text-light);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

/* Color Variants */
.stat-card-purple .stat-icon-wrap { background: rgba(108,99,255,0.1); color: #6C63FF; }
.stat-card-purple .stat-number { color: #6C63FF; }
.stat-card-purple .stat-card-bg-icon svg { color: #6C63FF; }

.stat-card-green .stat-icon-wrap { background: rgba(0,184,148,0.1); color: #00B894; }
.stat-card-green .stat-number { color: #00B894; }
.stat-card-green .stat-card-bg-icon svg { color: #00B894; }

.stat-card-amber .stat-icon-wrap { background: rgba(253,203,110,0.15); color: #E67E22; }
.stat-card-amber .stat-number { color: #E67E22; }
.stat-card-amber .stat-card-bg-icon svg { color: #E67E22; }

.stat-card-rose .stat-icon-wrap { background: rgba(255,101,132,0.1); color: #FF6584; }
.stat-card-rose .stat-number { color: #FF6584; }
.stat-card-rose .stat-card-bg-icon svg { color: #FF6584; }

.stat-card-red .stat-icon-wrap { background: rgba(225,112,85,0.1); color: #E17055; }
.stat-card-red .stat-number { color: #E17055; }
.stat-card-red .stat-card-bg-icon svg { color: #E17055; }

/* ---- Charts Grid ---- */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}
@media (max-width: 700px) {
    .charts-grid { grid-template-columns: 1fr; }
}
.chart-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
    overflow: hidden;
    transition: all 0.3s ease;
}
.chart-card:hover {
    box-shadow: 0 8px 30px rgba(0,0,0,0.08);
}
.chart-card-header {
    padding: 18px 20px 0;
}
.chart-card-header h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}
.chart-card-header h3 svg {
    color: #6C63FF;
}
.chart-body {
    padding: 12px 16px 16px;
    position: relative;
    height: 220px;
}
.chart-body-donut {
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ---- Section Header ---- */
.section-header {
    margin-bottom: 16px;
}
.section-header h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}
.section-header h3 svg {
    color: #6C63FF;
}

/* ---- Top Performers / Leaderboard ---- */
.top-performers-section {
    margin-bottom: 24px;
}
.leaderboard {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
}
.leaderboard::-webkit-scrollbar { height: 4px; }
.leaderboard::-webkit-scrollbar-track { background: transparent; }
.leaderboard::-webkit-scrollbar-thumb { background: #ddd; border-radius: 4px; }

.leader-card {
    flex: 0 0 200px;
    background: white;
    border-radius: 16px;
    padding: 18px;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}
.leader-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}
.leader-card .rank-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.72rem;
    font-weight: 800;
    color: white;
}
.rank-1 { background: linear-gradient(135deg, #FFD700, #FFA500); }
.rank-2 { background: linear-gradient(135deg, #C0C0C0, #A0A0A0); }
.rank-3 { background: linear-gradient(135deg, #CD7F32, #A0522D); }
.rank-other { background: #E0E0E0; color: #999; }

.leader-card .leader-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    margin: 0 auto 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 800;
    color: white;
}
.rank-1-avatar { background: linear-gradient(135deg, #FFD700, #FF8C00); box-shadow: 0 4px 12px rgba(255,215,0,0.4); }
.rank-2-avatar { background: linear-gradient(135deg, #C0C0C0, #888); box-shadow: 0 4px 12px rgba(192,192,192,0.4); }
.rank-3-avatar { background: linear-gradient(135deg, #CD7F32, #8B4513); box-shadow: 0 4px 12px rgba(205,127,50,0.4); }
.rank-other-avatar { background: linear-gradient(135deg, #6C63FF, #8B83FF); box-shadow: 0 4px 12px rgba(108,99,255,0.3); }

.leader-card .leader-name {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.leader-card .leader-score {
    font-size: 1.5rem;
    font-weight: 800;
    color: #6C63FF;
    line-height: 1;
}
.leader-card .leader-score-label {
    font-size: 0.7rem;
    color: var(--text-light);
    margin-top: 2px;
}

/* ---- Quiz Manager Section ---- */
.quiz-manager-section {
    margin-bottom: 24px;
}
.quiz-manager-item {
    display: flex;
    align-items: center;
    padding: 14px 18px;
    background: white;
    border-radius: 12px;
    margin-bottom: 8px;
    transition: all 0.25s ease;
    box-shadow: 0 1px 3px rgba(0,0,0,0.03);
    border: 1px solid transparent;
}
.quiz-manager-item:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.06);
    border-color: rgba(108,99,255,0.15);
}
.qmi-info { flex: 1; }
.qmi-info h4 {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 2px;
}
.qmi-info p {
    font-size: 0.78rem;
    color: var(--text-light);
}
.qmi-actions {
    display: flex;
    gap: 6px;
}
.qmi-btn {
    padding: 6px 14px;
    border-radius: 8px;
    border: 1.5px solid var(--border);
    background: white;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    color: var(--text);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.qmi-btn:hover {
    border-color: #6C63FF;
    color: #6C63FF;
    background: rgba(108,99,255,0.04);
}
.qmi-btn.delete-btn:hover {
    border-color: #E17055;
    color: #E17055;
    background: rgba(225,112,85,0.04);
}

/* ---- Premium Toolbar ---- */
.premium-toolbar {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    padding: 14px 18px;
    background: white;
    border-radius: 14px;
    margin-bottom: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
    align-items: center;
}
.toolbar-left {
    flex: 1;
    min-width: 220px;
}
.toolbar-right {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}
.premium-search {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    background: var(--bg);
    border: 1.5px solid transparent;
    border-radius: 10px;
    transition: all 0.25s ease;
}
.premium-search:focus-within {
    border-color: #6C63FF;
    background: white;
    box-shadow: 0 0 0 3px rgba(108,99,255,0.1);
}
.premium-search svg {
    color: var(--text-lighter);
    flex-shrink: 0;
}
.premium-search input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 0.88rem;
    background: transparent;
    color: var(--text);
    font-family: inherit;
}
.premium-search input::placeholder { color: var(--text-lighter); }
.search-kbd {
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    padding: 1px 6px;
    font-size: 0.68rem;
    color: #999;
    font-family: 'Inter', monospace;
}
.premium-select {
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    background: white;
    font-size: 0.82rem;
    color: var(--text);
    cursor: pointer;
    outline: none;
    font-family: inherit;
    font-weight: 500;
    transition: all 0.2s ease;
}
.premium-select:focus {
    border-color: #6C63FF;
    box-shadow: 0 0 0 3px rgba(108,99,255,0.1);
}
.btn-danger-outline {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    border-radius: 10px;
    background: white;
    color: #E17055;
    border: 1.5px solid #E17055;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}
.btn-danger-outline:hover {
    background: #E17055;
    color: white;
    box-shadow: 0 4px 12px rgba(225,112,85,0.3);
}

/* ---- Participant List ---- */
.participant-list {
    margin-bottom: 20px;
}
.participant-card {
    background: white;
    border-radius: 14px;
    padding: 18px;
    margin-bottom: 10px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
    border-left: 4px solid #6C63FF;
    position: relative;
    overflow: hidden;
}
.participant-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(108,99,255,0.02), transparent);
    pointer-events: none;
}
.participant-card:hover {
    box-shadow: 0 8px 30px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}
.participant-card.duplicate-card {
    border-left-color: #E17055;
}
.participant-card.duplicate-card::after {
    background: linear-gradient(135deg, rgba(225,112,85,0.04), transparent);
}

/* Participant Card Header */
.pc-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}
.pc-left {
    display: flex;
    align-items: center;
    gap: 14px;
}
.pc-avatar {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: linear-gradient(135deg, #6C63FF, #8B83FF);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(108,99,255,0.3);
}
.pc-info h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
}
.pc-info p {
    font-size: 0.8rem;
    color: var(--text-light);
}
.pc-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 700;
    margin-top: 4px;
    background: #E17055;
    color: white;
}
.pc-right {
    text-align: center;
}
.pc-score {
    padding: 8px 16px;
    background: rgba(108,99,255,0.06);
    border-radius: 12px;
}
.pc-score-value {
    font-size: 1.6rem;
    font-weight: 800;
    color: #6C63FF;
    line-height: 1;
}
.pc-score-label {
    font-size: 0.7rem;
    color: var(--text-light);
    margin-top: 2px;
}

/* Participant Stats Row */
.pc-stats-row {
    display: flex;
    gap: 8px;
}
.pc-stat {
    flex: 1;
    text-align: center;
    padding: 10px 6px;
    background: #f8f9fb;
    border-radius: 10px;
}
.pc-stat-val {
    font-size: 1.1rem;
    font-weight: 700;
}
.pc-stat-lbl {
    font-size: 0.7rem;
    color: var(--text-light);
    font-weight: 500;
}
.correct-stat .pc-stat-val { color: #00B894; }
.wrong-stat .pc-stat-val { color: #E17055; }
.skip-stat .pc-stat-val { color: #E67E22; }
.time-stat .pc-stat-val { color: #6C63FF; }

/* Participant Attempts */
.pc-attempts {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--border);
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.attempt-chip {
    display: inline-block;
    padding: 4px 12px;
    background: #f8f9fb;
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--text-light);
    font-weight: 500;
}
.attempt-chip.best-attempt {
    background: rgba(0,184,148,0.12);
    color: #00a381;
    font-weight: 700;
    border: 1px solid rgba(0,184,148,0.3);
}

/* ---- Premium Empty State ---- */
.empty-state-premium {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-light);
}
.empty-state-premium p {
    font-size: 0.9rem;
    margin-top: 12px;
}
.empty-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid #e8e8e8;
    border-top-color: #6C63FF;
    border-radius: 50%;
    margin: 0 auto;
    animation: spin 0.8s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* =============================================
   ADMIN MODAL — Premium Glass Design
   ============================================= */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15,23,42,0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1000;
    align-items: flex-start;
    justify-content: center;
    padding: 20px;
    overflow-y: auto;
}
.modal-overlay:not(.hidden) {
    display: flex !important;
}
.premium-modal {
    background: white;
    border-radius: 20px;
    width: 100%;
    max-width: 720px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.15);
    animation: modalSlideUp 0.35s cubic-bezier(0.16,1,0.3,1);
    margin-top: 20px;
    margin-bottom: 20px;
    overflow: hidden;
}
@keyframes modalSlideUp {
    from { opacity: 0; transform: translateY(20px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.premium-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid rgba(0,0,0,0.06);
    position: sticky;
    top: 0;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    z-index: 1;
}
.premium-modal-title-area h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text);
}
.modal-close-btn {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: none;
    background: #f1f1f1;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-light);
}
.modal-close-btn:hover {
    background: #E17055;
    color: white;
}
.premium-modal-body {
    padding: 24px;
    max-height: 70vh;
    overflow-y: auto;
}

/* Modal internal styles (reused) */
.modal-score-big {
    text-align: center;
    font-size: 2.8rem;
    font-weight: 900;
    color: #6C63FF;
    margin-bottom: 16px;
    letter-spacing: -1px;
}
.modal-time-info {
    background: #f8f9fb;
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 18px;
}
.modal-time-row {
    display: flex;
    justify-content: space-between;
    padding: 5px 0;
    font-size: 0.88rem;
}
.mt-label { color: var(--text-light); }
.mt-value { font-weight: 600; color: var(--text); }

.modal-answers h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
}
.modal-answer-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 10px;
    margin-bottom: 6px;
}
.ma-icon {
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: 1px;
}
.ma-content { flex: 1; }
.ma-question {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 3px;
}
.ma-answer {
    font-size: 0.82rem;
    color: var(--text-light);
}
.ma-correct-ans { color: #00B894; font-weight: 600; }
.ma-user-ans { font-weight: 600; }
.ma-correct { background: rgba(0,184,148,0.06); border-left: 3px solid #00B894; }
.ma-wrong { background: rgba(225,112,85,0.06); border-left: 3px solid #E17055; }
.ma-skip { background: rgba(253,203,110,0.08); border-left: 3px solid #E67E22; }

/* ---- Animations ---- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes slideUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes countUp {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
.stat-number {
    animation: countUp 0.5s ease-out;
}

/* ---- Toast Notification ---- */
.toast-premium {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(0);
    background: #2D3436;
    color: white;
    padding: 12px 28px;
    border-radius: 12px;
    font-size: 0.88rem;
    font-weight: 600;
    z-index: 9999;
    animation: toastIn 0.3s ease;
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
@keyframes toastIn {
    from { opacity: 0; transform: translateX(-50%) translateY(12px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* =============================================
   CREATE-QUIZ.PHP STYLES
   ============================================= */

/* Header */
.app-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 20px 16px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 100;
}
.app-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 4px;
}
.app-header p {
    font-size: 0.85rem;
    opacity: 0.85;
}

/* Navigation Links */
.nav-links {
    display: flex;
    gap: 8px;
    justify-content: center;
    padding: 12px 16px;
    background: white;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}
.nav-links a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.85rem;
    transition: var(--transition);
    border: 1.5px solid var(--primary);
}
.nav-links a:hover {
    background: var(--primary);
    color: white;
}

/* Cards */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.card:hover {
    box-shadow: var(--shadow-lg);
}
.card h2 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: var(--primary-dark);
}

/* Subject Folder Headers */
.subject-folder {
    margin-bottom: 24px;
}
.subject-folder-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 20px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    border-radius: var(--radius) var(--radius) 0 0;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    user-select: none;
}
.subject-folder-header .folder-icon {
    font-size: 1.3rem;
}
.subject-folder-header .quiz-count {
    margin-left: auto;
    background: rgba(255,255,255,0.2);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}
.subject-folder-content {
    border: 2px solid var(--border);
    border-top: none;
    border-radius: 0 0 var(--radius) var(--radius);
    padding: 8px;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 4px;
    padding: 4px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.tab {
    flex: 1;
    padding: 10px 12px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-light);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    text-align: center;
}
.tab.active {
    background: white;
    color: var(--primary);
    box-shadow: var(--shadow);
}
.tab-content {
    display: none;
}
.tab-content.active {
    display: block;
    animation: fadeInUp 0.3s ease;
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg);
    margin-bottom: 16px;
}
.upload-area:hover, .upload-area.dragover {
    border-color: var(--primary);
    background: rgba(108,99,255,0.05);
}
.upload-area .upload-icon {
    font-size: 3rem;
    margin-bottom: 12px;
    color: var(--primary);
}
.upload-area p {
    color: var(--text-light);
    font-size: 0.9rem;
}
.upload-area .upload-hint {
    font-size: 0.8rem;
    color: var(--text-lighter);
    margin-top: 8px;
}
.upload-preview {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--radius-sm);
    margin: 12px auto;
    display: block;
}

/* OCR Progress */
.ocr-progress {
    text-align: center;
    padding: 20px;
}
.ocr-progress .progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg);
    border-radius: 4px;
    overflow: hidden;
    margin: 12px 0;
}
.ocr-progress .progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 4px;
    transition: width 0.3s ease;
}
.ocr-progress .progress-text {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* Quiz Preview */
.quiz-preview {
    background: var(--bg);
    border-radius: var(--radius-sm);
    padding: 20px;
    margin: 16px 0;
    max-height: 400px;
    overflow-y: auto;
}
.quiz-preview .preview-question {
    padding: 12px;
    background: white;
    border-radius: 8px;
    margin-bottom: 8px;
    border-left: 3px solid var(--primary);
}
.quiz-preview .preview-question:last-child {
    margin-bottom: 0;
}
.quiz-preview .preview-q-text {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 4px;
}
.quiz-preview .preview-q-answer {
    font-size: 0.85rem;
    color: var(--success);
}

/* Manual Question Entry */
.manual-questions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.manual-question-entry {
    padding: 16px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}
.manual-question-entry .q-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}
.manual-question-entry .q-number {
    font-weight: 700;
    color: var(--primary);
    font-size: 0.9rem;
}
.manual-question-entry .remove-q {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 4px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1.4;
    font-family: inherit;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}
.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(108,99,255,0.4);
}
.btn-secondary {
    background: white;
    color: var(--primary);
    border: 2px solid var(--primary);
}
.btn-secondary:hover {
    background: var(--primary);
    color: white;
}
.btn-success {
    background: linear-gradient(135deg, var(--success), #00A381);
    color: white;
}
.btn-success:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(0,184,148,0.4);
}
.btn-danger {
    background: linear-gradient(135deg, var(--danger), #D63031);
    color: white;
}
.btn-danger:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(225,112,85,0.4);
}
.btn-warning {
    background: linear-gradient(135deg, var(--warning), #F9A825);
    color: var(--text);
}
.btn-sm {
    padding: 6px 14px;
    font-size: 0.8rem;
}
.btn-lg {
    padding: 16px 32px;
    font-size: 1.1rem;
}
.btn-block {
    width: 100%;
}
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* Forms */
.form-group {
    margin-bottom: 16px;
}
.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
    font-size: 0.9rem;
}
.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: var(--transition);
    background: white;
    color: var(--text);
    font-family: inherit;
}
.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(108,99,255,0.15);
}
textarea.form-control {
    min-height: 150px;
    resize: vertical;
    font-family: inherit;
}
select.form-control {
    appearance: none;
    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 fill='%23636E72' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.toast {
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s ease;
    max-width: 350px;
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: var(--warning); color: var(--text); }
.toast.info { background: var(--primary); }

/* Loading Overlay */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.9);
    z-index: 3000;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 16px;
}
.loading-overlay.active {
    display: flex;
}
.loading-overlay .loading-text {
    font-size: 1rem;
    color: var(--text-light);
    font-weight: 500;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-light);
}
.empty-state .empty-icon {
    font-size: 3rem;
    margin-bottom: 12px;
    opacity: 0.5;
}
.empty-state p {
    font-size: 0.95rem;
    margin-bottom: 16px;
}

/* Copy Link Button */
.copy-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    border-radius: 6px;
    background: rgba(108,99,255,0.1);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    border: 1px solid var(--primary);
    cursor: pointer;
    transition: var(--transition);
}
.copy-link-btn:hover {
    background: var(--primary);
    color: white;
}

/* =============================================
   UTILITIES
   ============================================= */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-muted { color: var(--text-muted); }
.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; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.hidden { display: none !important; }
.w-full { width: 100%; }

/* =============================================
   ANIMATIONS
   ============================================= */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes slideUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes slideInRight {
    from { opacity: 0; transform: translateX(100px); }
    to { opacity: 1; transform: translateX(0); }
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

/* =============================================
   SCROLLBAR
   ============================================= */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--text-lighter);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 640px) {
    .app-container {
        padding: 10px;
    }
    .container, .container-wide, .admin-container {
        padding: 10px;
    }
    .app-header h1 {
        font-size: 1.2rem;
    }
    .app-header {
        padding: 16px 12px;
    }
    .card {
        padding: 16px;
    }
    .nav-links {
        gap: 6px;
        padding: 10px 12px;
    }
    .nav-links a {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
    .question-box h1 {
        font-size: 1rem;
    }
    .final-score {
        font-size: 2.8rem;
    }
    .stats-row {
        gap: 6px;
    }
    .stat-box .stat-value {
        font-size: 1.2rem;
    }
    .dashboard-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    .dash-stat-value {
        font-size: 1.4rem;
    }
    .tabs {
        gap: 2px;
    }
    .tab {
        padding: 8px 6px;
        font-size: 0.72rem;
    }
    .admin-toolbar {
        flex-direction: column;
    }
    .search-box {
        min-width: 100%;
    }
    .filter-group {
        width: 100%;
    }
    .filter-select {
        flex: 1;
    }
    .modal-content {
        margin-top: 10px;
        margin-bottom: 10px;
        border-radius: var(--radius);
    }
    .modal-header {
        border-radius: var(--radius) var(--radius) 0 0;
    }
    .pc-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    .quiz-manager-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .qmi-actions {
        width: 100%;
    }
    .qmi-actions .qmi-btn {
        flex: 1;
        text-align: center;
    }
    .result-screen {
        padding: 20px 14px;
    }
    .time-info-card {
        min-width: auto;
        width: 100%;
    }
    .progress-dot {
        width: 26px;
        height: 26px;
        font-size: 0.65rem;
    }
}

@media (min-width: 768px) {
    .container {
        padding: 24px;
    }
    .admin-header {
        flex-wrap: nowrap;
    }
}