/* 
    Live Quiz & Teaching Platform - Modern Obsidian Theme
    Typography: Plus Jakarta Sans & JetBrains Mono
*/

:root {
    --bg-base: #060913;
    --bg-surface: #0c1122;
    --bg-panel: rgba(14, 20, 39, 0.85);
    --bg-card: rgba(18, 26, 50, 0.7);
    --bg-card-hover: rgba(26, 38, 72, 0.9);
    --bg-input: #090d1a;
    
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-mid: rgba(99, 102, 241, 0.25);
    --border-focus: #6366f1;
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    
    --accent-indigo: #6366f1;
    --accent-sky: #38bdf8;
    --accent-cyan: #06b6d4;
    --accent-violet: #8b5cf6;
    
    --status-success: #10b981;
    --status-warning: #f59e0b;
    --status-danger: #ef4444;
    --status-info: #3b82f6;
    
    --font-ui: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
}

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

html, body {
    height: 100%;
    width: 100%;
    background-color: var(--bg-base);
    color: var(--text-main);
    font-family: var(--font-ui);
    font-size: 14px;
    line-height: 1.45;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Scrollbars */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.15); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.3); }

/* Glass Panel Utility */
.glass-panel {
    background: var(--bg-panel);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(16px);
}

/* ================= APP HEADER ================= */
.app-header {
    height: 54px;
    background: rgba(10, 15, 30, 0.95);
    border-bottom: 1px solid var(--border-mid);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}
.brand-badge {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-violet));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 14px rgba(99, 102, 241, 0.5);
}
.brand-meta h2 {
    font-size: 1rem;
    font-weight: 800;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 4px;
}
.brand-meta h2 span {
    color: var(--accent-sky);
}
.sub-tag {
    font-size: 0.68rem;
    color: var(--text-dim);
    font-family: var(--font-mono);
}

/* Navigation Tabs */
.nav-tabs {
    display: flex;
    align-items: center;
    gap: 4px;
    background: rgba(0, 0, 0, 0.3);
    padding: 3px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
}
.nav-tab {
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-ui);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s ease;
}
.nav-tab:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}
.nav-tab.active {
    background: var(--accent-indigo);
    color: #fff;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}
.live-pulse-badge {
    font-size: 0.65rem;
    font-family: var(--font-mono);
    padding: 1px 6px;
    border-radius: 10px;
    background: rgba(16, 185, 129, 0.2);
    color: var(--status-success);
    border: 1px solid rgba(16, 185, 129, 0.4);
}

/* Header User Profile */
.header-user-zone {
    display: flex;
    align-items: center;
    gap: 10px;
}
.user-pill {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
}
.user-role-tag {
    font-size: 0.65rem;
    font-family: var(--font-mono);
    font-weight: 700;
    text-transform: uppercase;
    color: var(--accent-sky);
    background: rgba(56, 189, 248, 0.15);
    padding: 1px 5px;
    border-radius: 3px;
}
.user-name-text {
    font-weight: 600;
    color: #fff;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-family: var(--font-ui);
    font-size: 0.84rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.18s ease;
    text-decoration: none;
}
.btn-sm { padding: 5px 12px; font-size: 0.78rem; }
.btn-lg { padding: 10px 20px; font-size: 0.95rem; }
.btn-block { width: 100%; }

.btn-primary {
    background: linear-gradient(135deg, var(--accent-indigo), #4f46e5);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}
.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, #4f46e5, #4338ca);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
    transform: translateY(-1px);
}
.btn-ghost {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-main);
    border-color: var(--border-subtle);
}
.btn-ghost:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}
.btn-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--status-danger);
    border-color: rgba(239, 68, 68, 0.3);
}
.btn-danger:hover:not(:disabled) {
    background: rgba(239, 68, 68, 0.25);
    border-color: var(--status-danger);
}

/* ================= SPA VIEW ENGINE ================= */
.app-main-viewport {
    height: calc(100vh - 54px);
    overflow-y: auto;
}
.spa-view {
    display: none;
    height: 100%;
}
.spa-view.active {
    display: block;
}

/* ================= VIEW 1: AUTHENTICATION ================= */
.login-wrapper {
    min-height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: radial-gradient(circle at center, rgba(99, 102, 241, 0.1) 0%, transparent 60%);
}
.login-card {
    width: 100%;
    max-width: 440px;
    padding: 32px;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
}
.login-header {
    text-align: center;
    margin-bottom: 24px;
}
.login-icon {
    width: 54px;
    height: 54px;
    border-radius: var(--radius-lg);
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--accent-sky);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 14px;
}
.login-header h3 {
    font-size: 1.3rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 4px;
}
.login-header p {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 20px;
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.form-group label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.4px;
}
.form-group input, .form-group select, .form-group textarea {
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    color: #fff;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.88rem;
    transition: border-color 0.15s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25);
}


/* ================= VIEW 2: ORGANIZER COCKPIT ================= */
#view-organizer {
    padding: 20px;
}
.tab-view {
    display: none;
    flex-direction: column;
    gap: 16px;
}
.tab-view.active {
    display: flex;
}

.cockpit-top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.bar-title h2 {
    font-size: 1.25rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 2px;
}
.bar-title p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* --- TAB 1: LIVE RADAR SUPERVISION GRID --- */
.radar-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 14px;
}
.radar-empty {
    grid-column: 1 / -1;
    padding: 60px 20px;
    text-align: center;
    color: var(--text-dim);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}
.radar-ping-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--status-success);
    box-shadow: 0 0 16px var(--status-success);
    animation: pulseRadar 1.8s infinite;
}
@keyframes pulseRadar {
    0% { transform: scale(0.8); opacity: 0.9; }
    50% { transform: scale(1.4); opacity: 0.3; }
    100% { transform: scale(0.8); opacity: 0.9; }
}

/* Live Session Card */
.radar-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: all 0.18s ease;
    position: relative;
}
.radar-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}
.radar-card.active-telemetry {
    border-color: var(--status-success);
    box-shadow: 0 0 14px rgba(16, 185, 129, 0.2);
}

.radar-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 8px;
}
.quizee-meta-group h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
}
.quizee-email-text {
    font-size: 0.72rem;
    color: var(--text-dim);
    font-family: var(--font-mono);
}
.session-status-badge {
    font-size: 0.65rem;
    font-family: var(--font-mono);
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 10px;
    text-transform: uppercase;
}
.session-status-badge.online { background: rgba(16, 185, 129, 0.15); color: var(--status-success); border: 1px solid rgba(16, 185, 129, 0.3); }
.session-status-badge.completed { background: rgba(56, 189, 248, 0.15); color: var(--accent-sky); border: 1px solid rgba(56, 189, 248, 0.3); }

/* Radar Telemetry Body */
.radar-telemetry-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0, 0, 0, 0.3);
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
}
.tel-label { color: var(--text-dim); }
.tel-val { font-family: var(--font-mono); font-weight: 700; color: #fff; }
.tel-val.highlight { color: var(--accent-sky); }

/* Option Selection Live Visualizer */
.radar-options-ticker {
    display: flex;
    align-items: center;
    gap: 6px;
}
.radar-opt-chip {
    width: 22px;
    height: 22px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.68rem;
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--text-dim);
}
.radar-opt-chip.selected {
    background: var(--accent-indigo);
    border-color: var(--accent-sky);
    color: #fff;
    box-shadow: 0 0 8px rgba(99, 102, 241, 0.6);
}

.radar-card-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    border-top: 1px solid var(--border-subtle);
    padding-top: 8px;
}

/* --- TAB 2: QUIZ STUDIO CARDS --- */
.quizzes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 14px;
}
.quiz-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: all 0.18s;
    position: relative;
}
.quiz-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(99, 102, 241, 0.35);
}
.quiz-card.selected {
    background: rgba(99, 102, 241, 0.12);
    border-color: var(--accent-indigo);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.25);
}
.quiz-card-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 10px;
}
.quiz-card-head h3 {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    flex: 1;
}
.quiz-card-checkbox {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-indigo);
    cursor: pointer;
    margin-top: 2px;
}
.quiz-pill-chip {
    font-size: 0.72rem;
    background: rgba(99, 102, 241, 0.2);
    color: var(--accent-sky);
    border: 1px solid rgba(99, 102, 241, 0.4);
    padding: 2px 8px;
    border-radius: 12px;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.quiz-metrics-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.q-metric-pill {
    font-size: 0.68rem;
    font-family: var(--font-mono);
    padding: 2px 7px;
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--border-subtle);
    color: var(--text-muted);
}
.quiz-card-actions {
    display: flex;
    gap: 6px;
    margin-top: auto;
    border-top: 1px solid var(--border-subtle);
    padding-top: 10px;
    flex-wrap: wrap;
}

/* --- TAB 3: BULK UPLOADER --- */
.bulk-upload-container {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.upload-dropzone {
    padding: 40px 20px;
    text-align: center;
    border: 2px dashed rgba(99, 102, 241, 0.3);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}
.upload-dropzone:hover {
    border-color: var(--accent-sky);
    background: rgba(99, 102, 241, 0.08);
}
.dropzone-icon {
    color: var(--accent-sky);
}
.target-quiz-selector {
    display: flex;
    flex-direction: column;
    gap: 4px;
    text-align: left;
    width: 100%;
    max-width: 380px;
}
.target-quiz-selector select {
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    color: #fff;
    padding: 8px;
    border-radius: var(--radius-sm);
}

/* --- TAB 4: STUDENTS TABLE --- */
.quizees-table-wrap {
    overflow-x: auto;
}
.dense-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}
.dense-table th {
    background: rgba(0, 0, 0, 0.3);
    padding: 10px 14px;
    text-align: left;
    color: var(--text-dim);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    font-size: 0.72rem;
    border-bottom: 1px solid var(--border-subtle);
}
.dense-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-main);
}
.dense-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* ================= VIEW 3: QUIZEE TEST PORTAL ================= */
#view-quizee {
    padding: 20px;
}
.quizee-subview {
    display: none;
    height: 100%;
}
.quizee-subview.active {
    display: block;
}

.student-welcome-banner {
    padding: 24px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(56, 189, 248, 0.05));
}
.student-welcome-banner h2 {
    font-size: 1.3rem;
    font-weight: 800;
    color: #fff;
}
.student-welcome-banner p {
    font-size: 0.84rem;
    color: var(--text-muted);
}

.assigned-quizzes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 16px;
}
.assigned-quiz-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: all 0.18s;
}
.assigned-quiz-card:hover {
    border-color: rgba(99, 102, 241, 0.4);
    background: var(--bg-card-hover);
}

/* ================= TEST PLAYER LAYOUT ================= */
.test-player-layout {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.test-top-bar {
    padding: 12px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}
.test-quiz-info h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: #fff;
}
.question-progress-chip {
    font-size: 0.72rem;
    font-family: var(--font-mono);
    color: var(--accent-sky);
}

.test-timers-group {
    display: flex;
    align-items: center;
    gap: 10px;
}
.timer-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(0, 0, 0, 0.35);
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
}
.timer-box .timer-label {
    font-size: 0.62rem;
    color: var(--text-dim);
    text-transform: uppercase;
}
.timer-box .timer-digits {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
}
.timer-box.per-q-box .timer-digits {
    color: var(--status-warning);
}

/* Question Grid */
.test-content-grid {
    display: grid;
    grid-template-columns: 1fr 260px;
    gap: 16px;
}
.test-question-pane {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.q-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.q-num-tag {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px;
    background: rgba(99, 102, 241, 0.2);
    color: var(--accent-sky);
}
.q-marks-tag {
    font-size: 0.72rem;
    color: var(--text-dim);
}
.q-text-body {
    font-size: 1.05rem;
    font-weight: 600;
    color: #fff;
    line-height: 1.5;
}

/* Option Selector Cards */
.option-card {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: all 0.15s ease;
    user-select: none;
}
.option-card:hover:not(.disabled) {
    background: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.35);
}
.option-card.pending {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--accent-sky);
    box-shadow: 0 0 12px rgba(56, 189, 248, 0.3);
}
.option-card.pending .opt-letter-badge {
    background: var(--accent-sky);
    border-color: var(--accent-sky);
    color: #000;
}
.option-card.correct {
    background: rgba(16, 185, 129, 0.2) !important;
    border-color: var(--status-success) !important;
    box-shadow: 0 0 14px rgba(16, 185, 129, 0.35);
}
.option-card.correct .opt-letter-badge {
    background: var(--status-success) !important;
    border-color: var(--status-success) !important;
    color: #000 !important;
}
.option-card.wrong {
    background: rgba(239, 68, 68, 0.2) !important;
    border-color: var(--status-danger) !important;
    box-shadow: 0 0 14px rgba(239, 68, 68, 0.35);
}
.option-card.wrong .opt-letter-badge {
    background: var(--status-danger) !important;
    border-color: var(--status-danger) !important;
    color: #fff !important;
}
.option-card.disabled {
    cursor: default;
}
.opt-letter-badge {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-muted);
}
.opt-text {
    font-size: 0.92rem;
    color: #e2e8f0;
}

.btn-answer-confirm {
    background: linear-gradient(135deg, var(--status-success), #059669);
    color: #000;
    font-weight: 700;
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
}
.btn-answer-confirm:hover:not(:disabled) {
    background: linear-gradient(135deg, #34d399, var(--status-success));
    transform: translateY(-1px);
}

/* Instant Teacher Explanation Card (Teaching Mode) */
.instant-explanation-card {
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    animation: fadeIn 0.25s ease-out;
}
.instant-explanation-card.wrong {
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.3);
}
.instant-explanation-card.timeout {
    background: rgba(245, 158, 11, 0.08);
    border-color: rgba(245, 158, 11, 0.35);
}
.explanation-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.expl-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 700;
    color: var(--status-success);
    font-size: 0.88rem;
}
.instant-explanation-card.wrong .expl-badge {
    color: var(--status-danger);
}
.expl-marks-info {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: #fff;
}
.explanation-content {
    font-size: 0.86rem;
    color: #cbd5e1;
    line-height: 1.5;
    white-space: pre-line;
}

.q-navigation-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--border-subtle);
    padding-top: 16px;
    margin-top: 8px;
}

/* Question Palette */
.test-palette-pane {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.palette-legend {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.72rem;
    color: var(--text-dim);
}
.leg-item { display: flex; align-items: center; gap: 6px; }
.leg-dot { width: 8px; height: 8px; border-radius: 50%; }
.leg-dot.answered { background: var(--status-success); }
.leg-dot.flagged { background: var(--status-warning); }
.leg-dot.unvisited { background: var(--border-subtle); }

.palette-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}
.pal-btn {
    aspect-ratio: 1;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.12s;
}
.pal-btn:hover { background: rgba(255, 255, 255, 0.1); }
.pal-btn.current { border-color: var(--accent-sky); color: #fff; box-shadow: 0 0 8px var(--accent-sky); }
.pal-btn.answered { background: rgba(16, 185, 129, 0.2); border-color: var(--status-success); color: var(--status-success); }
.pal-btn.flagged { background: rgba(245, 158, 11, 0.2); border-color: var(--status-warning); color: var(--status-warning); }

/* ================= SCORECARD & REPORT VIEW ================= */
.scorecard-wrapper {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px 0;
}
.scorecard-card {
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.scorecard-header {
    text-align: center;
}
.status-icon-ring {
    font-size: 2.5rem;
    margin-bottom: 8px;
}
.scorecard-metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}
.metric-card {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 14px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.metric-card .m-label { font-size: 0.72rem; color: var(--text-dim); text-transform: uppercase; }
.metric-card .m-val { font-family: var(--font-mono); font-size: 1.15rem; font-weight: 700; color: #fff; }
.metric-card .m-val.highlight { color: var(--accent-sky); }
.metric-card .m-val.status { color: var(--status-success); }

.scorecard-breakdown-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
    border-top: 1px solid var(--border-subtle);
    padding-top: 20px;
}
.scorecard-review-item {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.scorecard-review-item.correct { border-left: 4px solid var(--status-success); }
.scorecard-review-item.wrong { border-left: 4px solid var(--status-danger); }

/* ================= MODALS & TOASTS ================= */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
}
.modal-dialog {
    width: 100%;
    max-width: 480px;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: modalIn 0.2s ease-out;
}
.modal-dialog.modal-lg { max-width: 640px; }
@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}
.modal-head {
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-subtle);
}
.modal-head h3 { font-size: 1.05rem; font-weight: 700; color: #fff; }
.modal-close-btn {
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 1.4rem;
    cursor: pointer;
}
.modal-close-btn:hover { color: #fff; }
.modal-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.modal-body.scrollable { max-height: 70vh; overflow-y: auto; }
.modal-foot {
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    border-top: 1px solid var(--border-subtle);
    background: rgba(0, 0, 0, 0.2);
}

.form-row-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
}

/* Custom Switch Toggle */
.rules-toggles-box {
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: rgba(0, 0, 0, 0.25);
    padding: 12px;
    border-radius: var(--radius-sm);
}
.toggle-control {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
}
.toggle-control input { display: none; }
.toggle-switch {
    width: 32px;
    height: 18px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.15);
    position: relative;
    transition: all 0.2s;
    flex-shrink: 0;
}
.toggle-switch::after {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #fff;
    top: 2px;
    left: 2px;
    transition: all 0.2s;
}
.toggle-control input:checked ~ .toggle-switch {
    background: var(--accent-indigo);
}
.toggle-control input:checked ~ .toggle-switch::after {
    transform: translateX(14px);
}
.toggle-text { font-size: 0.8rem; color: #cbd5e1; }

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 1000;
}
.toast {
    padding: 10px 16px;
    border-radius: var(--radius-md);
    background: var(--bg-surface);
    border: 1px solid var(--border-mid);
    color: #fff;
    font-size: 0.82rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
    animation: toastSlide 0.25s ease forwards;
}
@keyframes toastSlide {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ================= QUESTION STUDIO & EDITOR ================= */
.questions-editor-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.question-editor-card {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: all 0.15s ease;
}
.question-editor-card:hover {
    border-color: rgba(99, 102, 241, 0.4);
    background: rgba(0, 0, 0, 0.5);
}
.q-card-top-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.q-card-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}
.q-card-text {
    font-size: 0.95rem;
    font-weight: 600;
    color: #fff;
    line-height: 1.45;
}
.q-card-options-preview {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.q-opt-preview-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: #cbd5e1;
    background: rgba(255, 255, 255, 0.02);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
}
.q-opt-preview-item.correct {
    border-color: rgba(16, 185, 129, 0.4);
    background: rgba(16, 185, 129, 0.08);
    color: #fff;
}
.q-opt-preview-badge {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.72rem;
    padding: 1px 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-muted);
}
.q-opt-preview-item.correct .q-opt-preview-badge {
    background: var(--status-success);
    color: #000;
}

/* Option Builder Rows in Form */
.options-builder-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.option-builder-row {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
}
.option-builder-row input[type="text"] {
    flex: 1;
    min-width: 0;
}
.opt-label-badge {
    width: 28px;
    height: 34px;
    border-radius: var(--radius-sm);
    background: rgba(99, 102, 241, 0.2);
    border: 1px solid rgba(99, 102, 241, 0.4);
    color: var(--accent-sky);
    font-family: var(--font-mono);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.btn-remove-opt {
    width: 32px;
    height: 34px;
    border-radius: var(--radius-sm);
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--status-danger);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.btn-remove-opt:hover {
    background: rgba(239, 68, 68, 0.3);
}

/* ================= LIVE SCREEN MIRROR ================= */
.live-mirror-dialog {
    max-width: 840px;
}
.live-pulse-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--status-success);
    box-shadow: 0 0 10px var(--status-success);
    animation: livePulse 1.5s infinite;
}
@keyframes livePulse {
    0% { transform: scale(0.9); opacity: 0.9; }
    50% { transform: scale(1.3); opacity: 0.4; }
    100% { transform: scale(0.9); opacity: 0.9; }
}
.mirrored-question-box {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-mid);
    border-radius: var(--radius-md);
    padding: 20px;
}
.mirror-teacher-dock {
    margin-top: 16px;
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-radius: var(--radius-md);
    padding: 12px 16px;
}

/* ==========================================================================
   COMPREHENSIVE MOBILE & RESPONSIVE DESIGN ENGINE (ALL COMPONENTS)
   ========================================================================== */

/* --- TABLET & MEDIUM SCREENS (<= 1024px) --- */
@media (max-width: 1024px) {
    .radar-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
    .quizzes-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
    .assigned-quizzes-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
    .test-content-grid {
        grid-template-columns: 1fr 220px;
    }
}

/* --- MOBILE & SMALL TABLET SCREENS (<= 840px) --- */
@media (max-width: 840px) {
    .app-header {
        height: auto;
        min-height: 52px;
        padding: 8px 12px;
        flex-wrap: wrap;
        gap: 8px;
        justify-content: space-between;
    }
    .header-brand {
        gap: 8px;
    }
    .brand-meta .sub-tag {
        display: none;
    }
    .brand-meta h2 {
        font-size: 0.95rem;
    }
    .brand-badge {
        width: 28px;
        height: 28px;
    }
    .header-user-zone {
        gap: 6px;
    }
    .user-pill {
        padding: 3px 8px;
        font-size: 0.72rem;
        gap: 6px;
    }
    .user-name-text {
        max-width: 85px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .user-role-tag {
        font-size: 0.6rem;
        padding: 1px 4px;
    }
    .logout-text {
        display: none;
    }

    /* Sub-nav horizontal scrollbar on mobile */
    .header-center {
        width: 100% !important;
        order: 3;
        margin-top: 2px;
    }
    .nav-tabs {
        width: 100%;
        display: flex;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        justify-content: flex-start;
        padding: 3px;
        gap: 4px;
    }
    .nav-tabs::-webkit-scrollbar {
        display: none;
    }
    .nav-tab {
        flex: 0 0 auto;
        padding: 5px 10px;
        font-size: 0.75rem;
        white-space: nowrap;
    }
    .nav-tab svg {
        width: 14px;
        height: 14px;
    }

    .app-main-viewport {
        height: auto;
        min-height: calc(100dvh - 90px);
    }
}

/* --- MOBILE PHONE VIEWPORT (<= 768px) --- */
@media (max-width: 768px) {
    body {
        font-size: 13.5px;
    }

    /* Prevent input auto-zoom on iOS */
    .form-group input, 
    .form-group select, 
    .form-group textarea,
    #quizzes-search-filter,
    #assign-quizzes-search-input {
        font-size: 16px !important;
    }

    /* Organizer Cockpit */
    #view-organizer {
        padding: 12px 10px 30px;
    }
    .cockpit-top-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }
    .cockpit-top-bar .bar-title h2 {
        font-size: 1.15rem;
    }
    .cockpit-top-bar .btn {
        width: 100%;
        justify-content: center;
    }

    /* Radar Supervision Cards */
    .radar-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    .radar-card {
        padding: 12px;
    }
    .radar-card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }
    .radar-card-actions {
        width: 100%;
        display: flex;
        gap: 6px;
    }
    .radar-card-actions .btn {
        flex: 1;
        justify-content: center;
        min-height: 38px;
    }

    /* Quiz Studio Grid & Cards */
    .quizzes-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .quiz-card {
        padding: 14px;
    }
    .quiz-card-head {
        gap: 8px;
    }
    .quiz-card-head h3 {
        font-size: 0.95rem;
        line-height: 1.35;
    }
    .quiz-card-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 6px;
    }
    .quiz-card-actions .btn {
        width: 100%;
        justify-content: center;
        min-height: 36px;
        padding: 6px 4px;
        font-size: 0.74rem;
    }

    /* Bulk Action Toolbar */
    .bulk-action-toolbar {
        flex-direction: column;
        align-items: stretch !important;
        gap: 10px !important;
        padding: 10px 12px;
    }
    .bulk-action-toolbar > div {
        width: 100%;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 8px;
    }
    #quizzes-search-filter, #assign-quizzes-search-input {
        width: 100% !important;
        margin-bottom: 2px;
    }

    /* Students Table */
    .quizees-table-wrap {
        border-radius: var(--radius-md);
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin: 0 -4px;
        padding: 0 4px;
    }
    .dense-table {
        min-width: 580px;
        font-size: 0.78rem;
    }
    .dense-table th, .dense-table td {
        padding: 8px 10px;
    }

    /* Bulk Importer Tab */
    .bulk-upload-container {
        padding: 0 4px;
    }
    .upload-dropzone {
        padding: 26px 14px;
        gap: 8px;
    }
    .upload-dropzone h3 {
        font-size: 1rem;
    }

    /* Quizee Student View */
    #view-quizee {
        padding: 10px 8px 30px;
    }
    .student-welcome-banner {
        padding: 16px 14px;
        border-radius: var(--radius-md);
    }
    .student-welcome-banner h2 {
        font-size: 1.15rem;
    }
    .assigned-quizzes-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .assigned-quiz-card {
        padding: 14px;
    }

    /* Test Player Layout */
    .test-player-layout {
        gap: 10px;
    }
    .test-top-bar {
        padding: 10px 12px;
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
        border-radius: var(--radius-md);
    }
    .test-quiz-info h3 {
        font-size: 0.95rem;
        line-height: 1.35;
    }
    .test-timers-group {
        width: 100%;
        display: flex;
        justify-content: space-between;
        gap: 6px;
    }
    .timer-box {
        padding: 4px 8px;
        flex: 1;
        text-align: center;
    }
    .timer-box .timer-digits {
        font-size: 0.88rem;
    }
    .test-content-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .test-question-pane {
        padding: 14px 12px;
        border-radius: var(--radius-md);
        gap: 14px;
    }
    .q-text-body {
        font-size: 0.96rem;
        line-height: 1.45;
    }
    .option-card {
        padding: 12px 14px;
        min-height: 48px;
        border-radius: var(--radius-sm);
        gap: 10px;
    }
    .opt-letter-badge {
        width: 26px;
        height: 26px;
        font-size: 0.75rem;
        flex-shrink: 0;
    }
    .opt-text {
        font-size: 0.88rem;
        line-height: 1.4;
        word-break: break-word;
    }
    .instant-explanation-card {
        padding: 12px;
        border-radius: var(--radius-sm);
    }
    .explanation-content {
        font-size: 0.82rem;
    }
    .q-navigation-bar {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        justify-content: space-between;
        padding-top: 12px;
    }
    .q-navigation-bar .btn {
        flex: 1 1 calc(50% - 6px);
        min-height: 42px;
        font-size: 0.8rem;
    }
    .btn-answer-confirm {
        width: 100% !important;
        min-height: 44px !important;
        order: -1;
        flex: 1 1 100% !important;
        margin-bottom: 2px;
    }
    .test-palette-pane {
        padding: 12px;
        border-radius: var(--radius-md);
    }
    .palette-grid {
        grid-template-columns: repeat(auto-fill, minmax(36px, 1fr));
        gap: 6px;
    }
    .pal-btn {
        height: 36px;
        font-size: 0.76rem;
    }

    /* Scorecard & Report View */
    .scorecard-wrapper {
        padding: 8px 0;
    }
    .scorecard-card {
        padding: 18px 12px;
        border-radius: var(--radius-md);
        gap: 16px;
    }
    .scorecard-header h2 {
        font-size: 1.2rem;
    }
    .scorecard-metrics-grid {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }
    .metric-card {
        padding: 10px 8px;
    }
    .metric-card .m-val {
        font-size: 1.05rem;
    }
    .scorecard-review-item {
        padding: 12px 10px;
        font-size: 0.82rem;
    }

    /* Modals & Dialogs */
    .modal-backdrop {
        padding: 8px;
        align-items: flex-end;
    }
    .modal-dialog {
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 !important;
        max-height: 92vh;
        border-radius: var(--radius-lg) var(--radius-lg) var(--radius-md) var(--radius-md);
    }
    .modal-head {
        padding: 12px 14px;
    }
    .modal-head h3 {
        font-size: 0.95rem;
    }
    .modal-body {
        padding: 14px 12px;
        max-height: 65vh;
        gap: 12px;
    }
    .modal-foot {
        padding: 10px 12px;
        flex-direction: column-reverse;
        gap: 8px;
    }
    .modal-foot .btn {
        width: 100%;
        min-height: 42px;
        justify-content: center;
    }
    .form-row-3 {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    #modal-manage-questions .modal-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    #modal-manage-questions .modal-head > div:last-child {
        width: 100%;
        display: flex;
        flex-wrap: wrap;
        justify-content: flex-end;
        gap: 6px;
    }
    #modal-manage-questions .modal-head .btn {
        font-size: 0.72rem;
        padding: 4px 8px;
    }
    .option-builder-row {
        width: 100%;
        gap: 6px;
    }
    .option-builder-row input[type="text"] {
        flex: 1;
        min-width: 0;
    }

    /* Toast Notifications on Mobile */
    .toast-container {
        bottom: 12px;
        right: 12px;
        left: 12px;
        width: auto;
    }
    .toast {
        padding: 8px 12px;
        font-size: 0.78rem;
    }
}

/* --- ULTRA-COMPACT MOBILE SCREENS (<= 380px) --- */
@media (max-width: 380px) {
    .brand-meta h2 {
        font-size: 0.85rem;
    }
    .user-pill {
        display: none;
    }
    .quiz-card-actions {
        grid-template-columns: 1fr;
    }
    .scorecard-metrics-grid {
        grid-template-columns: 1fr;
    }
    .q-navigation-bar .btn {
        flex: 1 1 100%;
    }
}

/* ================= COURSE & COLLECTION GROUPING STYLES ================= */
.course-group-card {
    background: rgba(15, 23, 42, 0.65);
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(12px);
    transition: border-color 0.2s ease;
}
.course-group-card:hover {
    border-color: rgba(99, 102, 241, 0.45);
}
.course-group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.course-group-title-group {
    display: flex;
    align-items: center;
    gap: 8px;
}
.course-group-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: #fff;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 6px;
}
.course-group-progress-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
}
.course-progress-badge {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-sky);
    font-weight: 600;
}
.course-progress-badge.all-complete {
    background: rgba(16, 185, 129, 0.18);
    color: var(--status-success);
}
.course-progress-track {
    width: 90px;
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    overflow: hidden;
}
.course-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-indigo), var(--accent-sky));
    border-radius: 3px;
    transition: width 0.3s ease;
}
.course-progress-fill.all-complete {
    background: linear-gradient(90deg, #059669, var(--status-success));
}
.course-quizzes-subgrid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
}
.collection-badge-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    background: rgba(99, 102, 241, 0.16);
    color: var(--accent-sky);
    border: 1px solid rgba(99, 102, 241, 0.3);
}
.collection-manage-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    gap: 12px;
    transition: background 0.15s ease;
}
.collection-manage-item:hover {
    background: rgba(255, 255, 255, 0.06);
}