/* 🇺🇸 US DMV 100 PASS MASTER MODERN DESIGN SYSTEM */

:root {
    --bg-dark: #0b0f19;
    --card-bg: rgba(20, 27, 45, 0.85);
    --accent-gold: #fbbf24;
    --accent-blue: #3b82f6;
    --accent-cyan: #06b6d4;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.12);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Noto Sans KR', 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    padding: 16px;
    background-image: radial-gradient(circle at 10% 20%, rgba(59, 130, 246, 0.15) 0%, transparent 40%),
                      radial-gradient(circle at 90% 80%, rgba(251, 191, 36, 0.12) 0%, transparent 40%);
}

.app-container {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* HEADER */
.app-header {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(16px);
    border-radius: 16px;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.brand-badge {
    background: linear-gradient(135deg, var(--accent-gold), #f59e0b);
    color: #000;
    font-weight: 900;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 12px;
}

.brand-logo {
    font-family: 'Black Han Sans', 'Outfit', sans-serif;
    font-size: 1.6rem;
    color: var(--accent-gold);
    letter-spacing: 1px;
}

.brand-sub {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.header-actions {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.state-select-box select, .lang-select-box select {
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    border: 1px solid var(--accent-blue);
    padding: 8px 12px;
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
}

.hdr-btn {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-color);
    color: #fff;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
}

.hdr-btn.btn-gold {
    background: var(--accent-gold);
    color: #000;
}

/* NAVIGATION TABS */
.feature-tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 4px;
}

.tab-btn {
    flex: 1;
    min-width: 180px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 0.88rem;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.25s ease;
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--accent-blue), #2563eb);
    color: #fff;
    border-color: var(--accent-blue);
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.suite-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(16px);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.card-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

.type-chips, .sign-cat-chips {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.chip {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    color: #fff;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 700;
    cursor: pointer;
}

.chip.active {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
}

.chip-gold {
    background: var(--accent-gold) !important;
    color: #000 !important;
}

/* QUIZ VIEWER */
.quiz-viewer-card {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.quiz-status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    font-weight: 800;
}

.quiz-type-badge {
    background: rgba(6, 182, 212, 0.2);
    color: var(--accent-cyan);
    padding: 4px 10px;
    border-radius: 8px;
}

.btn-audio {
    background: rgba(251, 191, 36, 0.2);
    color: var(--accent-gold);
    border: 1px solid var(--accent-gold);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    cursor: pointer;
}

.question-text-box .q-en {
    font-size: 1.15rem;
    color: var(--accent-gold);
    margin-bottom: 6px;
}

.question-text-box .q-ko {
    font-size: 1.05rem;
    color: #fff;
}

.options-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.option-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: #fff;
    padding: 14px 18px;
    border-radius: 10px;
    text-align: left;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s;
}

.option-btn:hover {
    background: rgba(59, 130, 246, 0.2);
    border-color: var(--accent-blue);
}

.option-btn.correct {
    background: rgba(16, 185, 129, 0.25) !important;
    border-color: var(--accent-green) !important;
    color: #fff !important;
}

.option-btn.wrong {
    background: rgba(239, 68, 68, 0.25) !important;
    border-color: var(--accent-red) !important;
    color: #fff !important;
}

.explanation-box {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--accent-green);
    border-radius: 10px;
    padding: 14px;
    font-size: 0.88rem;
}

.quiz-nav-row {
    display: flex;
    justify-content: space-between;
    gap: 10px;
}

.btn-nav {
    flex: 1;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-color);
    color: #fff;
    padding: 12px;
    border-radius: 10px;
    font-weight: 800;
    cursor: pointer;
}

.btn-nav.btn-gold {
    background: var(--accent-gold);
    color: #000;
}

/* NAVIGATION SIMULATOR */
.nav-simulator-container {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 16px;
}

@media (max-width: 900px) {
    .nav-simulator-container {
        grid-template-columns: 1fr;
    }
}

.map-view-box {
    position: relative;
    background: #0f172a;
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

#nav-map-canvas {
    width: 100%;
    height: 100%;
    min-height: 380px;
    display: block;
}

.gps-hud-overlay {
    position: absolute;
    top: 14px;
    left: 14px;
    right: 14px;
    display: flex;
    gap: 12px;
    pointer-events: none;
}

.hud-speed {
    background: rgba(0, 0, 0, 0.85);
    border: 2px solid var(--accent-red);
    padding: 8px 14px;
    border-radius: 12px;
    text-align: center;
}

.hud-speed .speed-val {
    font-size: 1.4rem;
    font-weight: 900;
    color: #fff;
    display: block;
}

.hud-speed .speed-unit {
    font-size: 0.65rem;
    color: var(--accent-gold);
}

.hud-instruction {
    flex: 1;
    background: rgba(0, 0, 0, 0.85);
    border: 1px solid var(--accent-cyan);
    border-radius: 12px;
    padding: 8px 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-icon {
    font-size: 1.6rem;
}

.nav-main {
    font-weight: 800;
    color: var(--accent-gold);
    font-size: 0.9rem;
}

.nav-sub {
    font-size: 0.75rem;
    color: #cbd5e1;
}

.nav-controls-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sim-actions-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.btn-sim {
    padding: 12px;
    border-radius: 10px;
    font-weight: 800;
    border: none;
    cursor: pointer;
}

.btn-sim.start {
    background: var(--accent-green);
    color: #000;
}

.btn-sim.reset {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border: 1px solid var(--border-color);
}

.btn-sim.voice {
    background: rgba(6, 182, 212, 0.2);
    color: var(--accent-cyan);
    border: 1px solid var(--accent-cyan);
}

.checkpoint-list-box {
    background: rgba(0, 0, 0, 0.4);
    padding: 12px;
    border-radius: 10px;
    font-size: 0.8rem;
}

.checkpoint-list-box ul {
    list-style: none;
    margin-top: 8px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.checkpoint-list-box li {
    padding: 6px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.03);
}

.checkpoint-list-box li.active {
    background: rgba(251, 191, 36, 0.2);
    border-left: 3px solid var(--accent-gold);
    color: var(--accent-gold);
    font-weight: 700;
}

/* FLASHCARDS */
.flashcard-container {
    height: 260px;
    perspective: 1000px;
    cursor: pointer;
}

.flashcard-inner {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s;
    border-radius: 16px;
}

.flashcard-container.flipped .flashcard-inner {
    transform: rotateY(180deg);
}

.flashcard-front, .flashcard-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 16px;
    border: 2px solid var(--accent-gold);
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
    text-align: center;
}

.flashcard-back {
    transform: rotateY(180deg);
    background: rgba(15, 23, 42, 0.95);
}

.sign-graphic-icon {
    font-size: 4rem;
    margin-bottom: 8px;
}

.flip-hint {
    font-size: 0.72rem;
    color: var(--accent-cyan);
    margin-top: 10px;
}

.flashcard-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* EXAMINER & AUTO-FAIL */
.examiner-grid-layout, .predictor-grid-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 800px) {
    .examiner-grid-layout, .predictor-grid-layout {
        grid-template-columns: 1fr;
    }
}

.audio-soundboard-box, .autofail-checklist-box, .predictor-score-card, .review-vault-box {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: 14px;
}

.sound-btn-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 12px;
}

.sound-btn {
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid var(--accent-blue);
    color: #fff;
    padding: 10px 14px;
    border-radius: 8px;
    text-align: left;
    font-size: 0.85rem;
    cursor: pointer;
}

.autofail-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 12px;
}

.fail-item {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    padding: 10px;
    border-radius: 8px;
    font-size: 0.8rem;
}

.fail-num {
    background: var(--accent-red);
    color: #fff;
    font-weight: 900;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.score-circle-badge {
    margin: 20px auto;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    border: 6px solid var(--accent-green);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(16, 185, 129, 0.1);
}

.score-val {
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--accent-green);
}

.score-lbl {
    font-size: 0.65rem;
    color: var(--text-muted);
}

/* MODALS */
.overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.overlay.active {
    display: flex !important;
}

.modal-box {
    background: #0f172a;
    border: 1px solid var(--accent-gold);
    border-radius: 16px;
    padding: 24px;
    max-width: 500px;
    width: 100%;
}

.modal-hdr {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.btn-close {
    background: none;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
}

.btn-primary-full {
    width: 100%;
    padding: 10px;
    background: var(--accent-gold);
    color: #000;
    font-weight: 800;
    border: none;
    border-radius: 8px;
    margin-top: 14px;
    cursor: pointer;
}