/* LingoQuest Styling System */

:root {
    --bg-deep-space: hsl(224, 71%, 4%);
    --bg-space-dark: hsl(224, 71%, 6%);
    --bg-glass-card: hsla(224, 71%, 8%, 0.75);
    --bg-glass-card-hover: hsla(224, 71%, 12%, 0.85);
    --border-glass: hsla(210, 40%, 98%, 0.12);
    --border-glass-active: hsla(190, 95%, 45%, 0.5);
    
    --accent-cyan: hsl(190, 95%, 45%);
    --accent-cyan-glow: hsla(190, 95%, 45%, 0.35);
    --accent-purple: hsl(265, 80%, 65%);
    --accent-purple-glow: hsla(265, 80%, 65%, 0.35);
    --accent-gold: hsl(45, 95%, 55%);
    --accent-gold-glow: hsla(45, 95%, 55%, 0.35);
    
    --state-success: hsl(145, 80%, 40%);
    --state-success-glow: hsla(145, 80%, 40%, 0.25);
    --state-failure: hsl(355, 80%, 55%);
    --state-failure-glow: hsla(355, 80%, 55%, 0.25);
    
    --text-primary: hsl(210, 40%, 98%);
    --text-muted: hsl(215, 20%, 68%);
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --transition-spring: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --transition-smooth: all 0.3s ease;
}

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

body {
    background-color: var(--bg-deep-space);
    background-image: 
        radial-gradient(at 0% 0%, hsla(253, 16%, 7%, 1) 0, transparent 50%), 
        radial-gradient(at 50% 0%, hsla(225, 39%, 30%, 0.15) 0, transparent 50%),
        radial-gradient(at 100% 0%, hsla(339, 49%, 30%, 0.08) 0, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    overflow-x: hidden;
}

/* App Shell Layout */
.app-container {
    width: 100%;
    max-width: 1200px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 20px;
}

/* Persistent Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 25px;
    border-radius: 16px;
    background: var(--bg-glass-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
    margin-bottom: 25px;
    z-index: 10;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--accent-cyan);
    filter: drop-shadow(0 0 8px var(--accent-cyan-glow));
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.6rem;
    background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.header-stats {
    display: flex;
    align-items: center;
    gap: 20px;
}

.stat-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 10px;
    background: hsla(0, 0%, 100%, 0.05);
    border: 1px solid var(--border-glass);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

.stat-badge.streak {
    border-color: rgba(255, 87, 34, 0.3);
    color: hsl(14, 100%, 65%);
}

.stat-badge.streak i {
    filter: drop-shadow(0 0 6px rgba(255, 87, 34, 0.5));
}

.stat-badge.coins {
    border-color: rgba(255, 193, 7, 0.3);
    color: hsl(45, 100%, 60%);
}

.stat-badge.coins i {
    filter: drop-shadow(0 0 6px rgba(255, 193, 7, 0.5));
}

/* Level Progress Bar */
.level-progress-container {
    display: flex;
    align-items: center;
    gap: 12px;
    background: hsla(0, 0%, 100%, 0.03);
    border: 1px solid var(--border-glass);
    padding: 6px 12px 6px 6px;
    border-radius: 20px;
}

.level-badge {
    background: linear-gradient(135deg, var(--accent-purple), hsl(265, 80%, 55%));
    padding: 4px 10px;
    border-radius: 12px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.85rem;
    color: white;
    box-shadow: 0 0 10px var(--accent-purple-glow);
}

.progress-bar-track {
    width: 100px;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    border-radius: 4px;
    transition: width 0.5s ease-out;
}

.xp-text {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    min-width: 65px;
}

/* Glassmorphism Cards */
.glass-card {
    background: var(--bg-glass-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.35);
    padding: 25px;
    transition: var(--transition-smooth);
}

/* Buttons */
.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, hsl(190, 95%, 35%) 100%);
    border: none;
    color: var(--bg-deep-space);
    font-family: var(--font-heading);
    font-weight: 700;
    padding: 12px 24px;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition-spring);
    font-size: 1rem;
}

.btn-primary:hover:not(:disabled) {
    transform: scale(1.04);
    box-shadow: 0 0 15px var(--accent-cyan-glow);
}

.btn-primary:active:not(:disabled) {
    transform: scale(0.98);
}

.btn-primary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    background: var(--text-muted);
}

.btn-primary.btn-glow {
    box-shadow: 0 0 10px var(--accent-cyan-glow);
}

.btn-secondary {
    background: hsla(0, 0%, 100%, 0.05);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-weight: 600;
    padding: 10px 18px;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition-smooth);
    font-size: 0.9rem;
}

.btn-secondary:hover {
    background: hsla(0, 0%, 100%, 0.1);
    border-color: var(--text-muted);
    transform: translateY(-1px);
}

.btn-large {
    padding: 15px 32px;
    font-size: 1.1rem;
}

.icon-button {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition-smooth);
}

.icon-button:hover {
    color: var(--text-primary);
    background: hsla(0, 0%, 100%, 0.08);
}

/* Screen Shell & Views */
.screen-viewport {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.screen-view {
    display: none;
    flex-direction: column;
    flex-grow: 1;
    animation: fadeIn 0.4s ease-out forwards;
}

.screen-view.active {
    display: flex;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Screen 1: Landing Grid */
.landing-hero {
    text-align: center;
    margin-bottom: 30px;
}

.landing-hero h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.7px;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--text-primary) 40%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.landing-hero p {
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.1rem;
}

.landing-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 25px;
    margin-bottom: 30px;
}

.header-icon-blue {
    color: var(--accent-cyan);
    margin-right: 10px;
}

.header-icon-purple {
    color: var(--accent-purple);
    margin-right: 10px;
}

.glass-card h2 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.4rem;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 12px;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

/* Genre Selector Grid */
.genre-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 12px;
}

.genre-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 18px 10px;
    background: hsla(0, 0%, 100%, 0.03);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition-spring);
    position: relative;
    user-select: none;
}

.genre-card:hover:not(.locked) {
    background: hsla(0, 0%, 100%, 0.08);
    border-color: var(--accent-purple);
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 4px 15px var(--accent-purple-glow);
}

.genre-card.active {
    background: var(--accent-purple-glow);
    border-color: var(--accent-purple);
    box-shadow: 0 0 15px var(--accent-purple-glow);
}

.genre-icon {
    font-size: 1.8rem;
    color: var(--text-muted);
    transition: var(--transition-smooth);
}

.genre-card.active .genre-icon {
    color: var(--accent-purple);
    filter: drop-shadow(0 0 6px var(--accent-purple-glow));
}

.genre-name {
    font-size: 0.85rem;
    font-weight: 600;
}

/* Locked Card overlay details */
.genre-card.locked {
    opacity: 0.55;
    cursor: not-allowed;
    background: hsla(0, 0%, 0%, 0.2);
}

.unlock-label {
    position: absolute;
    top: 6px;
    right: 8px;
    font-size: 0.7rem;
    background: hsla(0, 0%, 100%, 0.15);
    padding: 2px 6px;
    border-radius: 6px;
    font-weight: 600;
}

/* Segmented Control Difficulty */
.difficulty-control {
    display: flex;
    background: hsla(0, 0%, 0%, 0.25);
    border: 1px solid var(--border-glass);
    padding: 4px;
    border-radius: 10px;
    gap: 4px;
}

.diff-btn {
    flex-grow: 1;
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-heading);
    font-weight: 600;
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-smooth);
    font-size: 0.9rem;
}

.diff-btn:hover:not(.active) {
    color: var(--text-primary);
    background: hsla(0, 0%, 100%, 0.05);
}

.diff-btn.active {
    background: var(--accent-cyan);
    color: var(--bg-deep-space);
    box-shadow: 0 0 10px var(--accent-cyan-glow);
}

/* Drag-and-Drop Zone */
.upload-dropzone {
    border: 2.5px dashed var(--border-glass);
    border-radius: 14px;
    padding: 35px 20px;
    text-align: center;
    background: hsla(0, 0%, 100%, 0.02);
    cursor: pointer;
    transition: var(--transition-spring);
    user-select: none;
    margin-bottom: 20px;
}

.upload-dropzone:hover, .upload-dropzone.dragover {
    border-color: var(--accent-purple);
    background: var(--accent-purple-glow);
    transform: scale(1.015);
}

.upload-icon {
    font-size: 2.8rem;
    color: var(--accent-purple);
    margin-bottom: 12px;
    filter: drop-shadow(0 0 6px var(--accent-purple-glow));
    transition: var(--transition-spring);
}

.upload-dropzone:hover .upload-icon {
    transform: translateY(-4px) scale(1.1);
}

.upload-primary-text {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.upload-secondary-text {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.deck-loaded-status {
    margin-top: 15px;
    padding: 10px 14px;
    background: hsla(145, 80%, 40%, 0.1);
    border: 1px solid rgba(145, 80%, 40%, 0.3);
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: white;
}

.text-success {
    color: var(--state-success);
}

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.divider::before, .divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-glass);
}

.divider span {
    padding: 0 10px;
}

.demo-buttons-container {
    display: flex;
    gap: 12px;
}

.demo-buttons-container .btn-secondary {
    flex: 1;
}

.btn-badge-icon {
    font-size: 0.95rem;
    opacity: 0.8;
}

.landing-cta-container {
    display: flex;
    justify-content: center;
    margin-top: 5px;
}

/* Screen 2: Loading */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex-grow: 1;
    text-align: center;
    padding: 50px 20px;
    max-width: 600px;
    margin: 0 auto;
}

.loading-spinner-wrapper {
    position: relative;
    margin-bottom: 30px;
}

.pulsing-compass {
    font-size: 4.5rem;
    color: var(--accent-cyan);
    animation: rotateCompass 3s cubic-bezier(0.68, -0.6, 0.32, 1.6) infinite;
    filter: drop-shadow(0 0 15px var(--accent-cyan-glow));
}

@keyframes rotateCompass {
    0% { transform: rotate(0deg) scale(1); }
    30% { transform: rotate(180deg) scale(1.1); }
    50% { transform: rotate(180deg) scale(1.1); }
    80% { transform: rotate(360deg) scale(1); }
    100% { transform: rotate(360deg) scale(1); }
}

.loading-container h2 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.loading-subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 35px;
}

.tips-carousel {
    display: flex;
    gap: 15px;
    align-items: center;
    text-align: left;
    max-width: 500px;
    padding: 20px;
    background: hsla(0, 0%, 100%, 0.02);
}

.tip-icon {
    font-size: 1.8rem;
    color: var(--accent-gold);
    filter: drop-shadow(0 0 6px var(--accent-gold-glow));
    flex-shrink: 0;
}

.tips-carousel p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Screen 3: Story Viewport */
.story-viewport-card {
    max-width: 780px;
    margin: 0 auto;
    width: 100%;
}

.story-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 15px;
    margin-bottom: 22px;
}

.story-path-info {
    display: flex;
    gap: 8px;
}

.badge {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-purple {
    background: var(--accent-purple-glow);
    color: var(--accent-purple);
    border: 1px solid rgba(210, 150, 255, 0.2);
}

.badge-cyan {
    background: var(--accent-cyan-glow);
    color: var(--accent-cyan);
    border: 1px solid rgba(130, 240, 255, 0.2);
}

.badge-gold {
    background: var(--accent-gold-glow);
    color: var(--accent-gold);
    border: 1px solid rgba(255, 230, 130, 0.2);
}

.story-instruction {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.story-instruction i {
    margin-right: 4px;
}

.story-body-container {
    font-size: 1.15rem;
    line-height: 1.85;
    color: hsl(210, 20%, 90%);
    margin-bottom: 25px;
    max-height: 480px;
    overflow-y: auto;
    padding-right: 15px;
}

/* Scrollbar tweaks */
.story-body-container::-webkit-scrollbar {
    width: 6px;
}

.story-body-container::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.02);
    border-radius: 4px;
}

.story-body-container::-webkit-scrollbar-thumb {
    background: var(--border-glass);
    border-radius: 4px;
}

.story-body-container::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.story-body-container p {
    margin-bottom: 1.5rem;
    text-align: justify;
}

/* Interactive keywords */
.vocab-word {
    border-bottom: 2px dashed var(--accent-cyan);
    background-color: var(--accent-cyan-glow);
    cursor: pointer;
    padding: 1px 6px;
    border-radius: 4px;
    font-weight: 600;
    transition: var(--transition-smooth);
    display: inline-block;
    animation: pulseBorder 2s infinite alternate;
}

.vocab-word:hover {
    background-color: rgba(190, 95, 45, 0.5);
    border-bottom-style: solid;
    color: white;
    transform: scale(1.02);
}

@keyframes pulseBorder {
    0% { border-color: var(--accent-cyan); }
    100% { border-color: var(--accent-purple); }
}

/* Floating definition popover detail card */
.vocab-popover-card {
    position: absolute;
    width: 250px;
    padding: 18px;
    z-index: 100;
    background: hsla(224, 71%, 10%, 0.95);
    border: 1px solid var(--accent-cyan);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transform: scale(0.85) translateY(5px);
    transition: opacity 0.25s ease, transform 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275), visibility 0.25s ease;
}

.vocab-popover-card.visible {
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
    transform: scale(1) translateY(0);
}

.popover-close-btn {
    position: absolute;
    top: 10px;
    right: 12px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

.popover-close-btn:hover {
    color: var(--text-primary);
}

.popover-front {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-cyan);
    margin-bottom: 10px;
    padding-right: 15px;
}

.popover-back-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 2px;
}

.popover-back {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.popover-actions {
    display: flex;
    gap: 8px;
}

.popover-flag-btn {
    flex: 1;
    border: 1px solid var(--border-glass);
    background: hsla(0, 0%, 100%, 0.03);
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 6px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: var(--transition-smooth);
}

.popover-flag-btn.struggling:hover, .popover-flag-btn.struggling.active {
    color: var(--state-failure);
    border-color: var(--state-failure);
    background: var(--state-failure-glow);
}

.popover-flag-btn.mastered:hover, .popover-flag-btn.mastered.active {
    color: var(--state-success);
    border-color: var(--state-success);
    background: var(--state-success-glow);
}

/* Scroll completion and actions */
.story-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    border-top: 1px solid var(--border-glass);
    padding-top: 20px;
}

.scroll-prompt {
    font-size: 0.85rem;
    color: var(--accent-cyan);
    animation: verticalBounce 1.5s infinite;
    display: flex;
    align-items: center;
    gap: 6px;
}

@keyframes verticalBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

/* Screen 4: Cloze Rift drag-and-drop mechanics */
.drop-zone {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 130px;
    height: 28px;
    border: 2px dashed var(--accent-cyan-glow);
    background: hsla(190, 95%, 45%, 0.05);
    border-radius: 6px;
    vertical-align: middle;
    margin: 0 4px;
    transition: var(--transition-spring);
}

.drop-zone.dragover {
    border-color: var(--accent-cyan);
    background: var(--accent-cyan-glow);
    transform: scale(1.05);
}

.drop-zone.correct {
    border: 1px solid var(--state-success);
    background: var(--state-success-glow);
    width: auto;
    padding: 0 8px;
    height: auto;
    animation: correctPop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes correctPop {
    0% { transform: scale(0.9); }
    50% { transform: scale(1.1); box-shadow: 0 0 12px var(--state-success); }
    100% { transform: scale(1); }
}

.drag-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 12px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    background: linear-gradient(135deg, var(--bg-glass-card-hover), var(--bg-space-dark));
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    cursor: grab;
    transition: var(--transition-smooth);
    user-select: none;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.3);
}

.drag-pill:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 10px var(--accent-cyan-glow);
    transform: translateY(-2px);
}

.drag-pill:active {
    cursor: grabbing;
}

.drag-pill.dragging {
    opacity: 0.4;
}

.drop-zone.correct .drag-pill {
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
    cursor: default;
    color: white;
}

.cloze-tray-container {
    margin-top: 25px;
    border-top: 1px solid var(--border-glass);
    padding-top: 18px;
}

.cloze-tray-label {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.cloze-pills-tray {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 15px;
    background: hsla(0, 0%, 0%, 0.2);
    border-radius: 12px;
    min-height: 60px;
}

/* Shake elements keyframes */
.shake-error {
    animation: shake 0.4s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-6px); }
    40%, 80% { transform: translateX(6px); }
}

/* Screen 5: Comprehension Quest questions renderer */
.challenge-narrow-card {
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
}

.comp-steps-indicator {
    display: flex;
    gap: 8px;
}

.step-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    transition: var(--transition-smooth);
}

.step-dot.active {
    background: var(--accent-cyan);
    box-shadow: 0 0 8px var(--accent-cyan-glow);
}

.step-dot.completed {
    background: var(--accent-purple);
}

.comp-question-box h3 {
    font-family: var(--font-heading);
    font-size: 1.45rem;
    font-weight: 700;
    margin-bottom: 22px;
    line-height: 1.4;
}

.comp-options-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 22px;
}

.comp-option-card {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    border-radius: 12px;
    background: hsla(0, 0%, 100%, 0.03);
    border: 1px solid var(--border-glass);
    cursor: pointer;
    transition: var(--transition-spring);
    user-select: none;
    opacity: 0;
    transform: translateY(15px);
    animation: cascadeIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes cascadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.comp-option-card:nth-child(1) { animation-delay: 0.05s; }
.comp-option-card:nth-child(2) { animation-delay: 0.1s; }
.comp-option-card:nth-child(3) { animation-delay: 0.15s; }
.comp-option-card:nth-child(4) { animation-delay: 0.2s; }

.comp-option-card:hover:not(.locked) {
    background: hsla(0, 0%, 100%, 0.08);
    border-color: var(--accent-cyan);
    transform: scale(1.015);
}

.comp-option-card.locked {
    cursor: default;
}

.option-badge {
    background: hsla(0, 0%, 100%, 0.06);
    border: 1px solid var(--border-glass);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    margin-right: 15px;
    flex-shrink: 0;
}

.option-text {
    font-size: 0.95rem;
    font-weight: 500;
}

/* Choice card state colors */
.comp-option-card.correct {
    border-color: var(--state-success);
    background: var(--state-success-glow);
}

.comp-option-card.correct .option-badge {
    background: var(--state-success);
    border-color: var(--state-success);
    color: white;
}

.comp-option-card.incorrect {
    border-color: var(--state-failure);
    background: var(--state-failure-glow);
}

.comp-option-card.incorrect .option-badge {
    background: var(--state-failure);
    border-color: var(--state-failure);
    color: white;
}

.comp-explanation-card {
    padding: 18px;
    background: hsla(0, 0%, 100%, 0.015);
    margin-bottom: 20px;
    border-color: var(--border-glass);
    animation: slideDown 0.3s ease-out forwards;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.comp-explanation-card h4 {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--accent-cyan);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.comp-explanation-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.comp-actions {
    display: flex;
    justify-content: flex-end;
}

/* Screen 6: Speed Match card matching and timer */
.speed-match-timer-container {
    margin-bottom: 20px;
}

.timer-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 6px;
}

.timer-bar-track {
    width: 100%;
    height: 10px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 5px;
    overflow: hidden;
}

.timer-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    border-radius: 5px;
    transition: width 0.1s linear;
}

.speed-match-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    position: relative;
}

.speed-card {
    height: 80px;
    border-radius: 12px;
    border: 1px solid var(--border-glass);
    background: hsla(0, 0%, 100%, 0.03);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 10px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    user-select: none;
    transition: var(--transition-spring);
}

.speed-card:hover {
    border-color: var(--accent-purple);
    background: hsla(0, 0%, 100%, 0.08);
    transform: scale(1.03);
}

.speed-card.selected {
    border-color: var(--accent-purple);
    background: var(--accent-purple-glow);
    box-shadow: 0 0 10px var(--accent-purple-glow);
}

.speed-card.correct {
    border-color: var(--state-success);
    background: var(--state-success-glow);
    box-shadow: 0 0 10px var(--state-success-glow);
    opacity: 0;
    pointer-events: none;
    transform: scale(0.9);
}

.speed-card.incorrect {
    border-color: var(--state-failure);
    background: var(--state-failure-glow);
    box-shadow: 0 0 10px var(--state-failure-glow);
}

/* Speed Match Overlays */
.speed-match-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(5, 5, 10, 0.85);
    backdrop-filter: blur(8px);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.speed-match-overlay.visible {
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
}

.overlay-content {
    text-align: center;
    max-width: 400px;
    padding: 35px 25px;
    border-color: var(--border-glass);
    background: hsla(224, 71%, 10%, 0.95);
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.speed-match-overlay.visible .overlay-content {
    transform: scale(1);
}

.fail-icon {
    font-size: 3.5rem;
    color: var(--state-failure);
    margin-bottom: 15px;
    filter: drop-shadow(0 0 10px var(--state-failure-glow));
}

.overlay-content h3 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    margin-bottom: 10px;
}

.overlay-content p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 22px;
}

.overlay-content button {
    margin: 0 auto;
}

/* Screen 7: Victory Page layout */
.victory-card {
    text-align: center;
    max-width: 650px;
    margin: 0 auto;
    width: 100%;
    padding: 40px;
}

.victory-crown {
    margin-bottom: 20px;
}

.trophy-glow {
    font-size: 4rem;
    color: var(--accent-gold);
    animation: floatGlow 2.5s infinite ease-in-out;
}

@keyframes floatGlow {
    0%, 100% { transform: translateY(0); filter: drop-shadow(0 0 10px var(--accent-gold-glow)); }
    50% { transform: translateY(-8px); filter: drop-shadow(0 0 25px var(--accent-gold)); }
}

.victory-card h1 {
    font-family: var(--font-heading);
    font-size: 2.4rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.victory-subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 30px;
}

.score-summary-table {
    background: hsla(0, 0%, 0%, 0.2);
    border-radius: 12px;
    padding: 15px 25px;
    margin-bottom: 30px;
    border: 1px solid var(--border-glass);
}

.score-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.95rem;
}

.score-row:last-child {
    border-bottom: none;
}

.score-label {
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 8px;
}

.score-label i {
    width: 16px;
}

.score-value {
    font-weight: 600;
    color: var(--accent-cyan);
}

.score-row.total-row {
    border-top: 1px solid var(--border-glass);
    margin-top: 5px;
    padding-top: 15px;
    font-weight: 700;
    font-size: 1.1rem;
}

.score-row.total-row .score-label {
    color: var(--text-primary);
}

.score-row.total-row .score-value {
    color: var(--accent-gold);
}

.score-row.coins-row {
    font-weight: 600;
    color: hsl(45, 100%, 60%);
}

.score-row.coins-row .score-value {
    color: hsl(45, 100%, 60%);
}

/* SVGs Circular Progress bar */
.victory-progress-section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    margin-bottom: 35px;
}

.circular-progress-wrapper {
    position: relative;
    width: 120px;
    height: 120px;
}

.circular-progress-svg {
    transform: rotate(-90deg);
    width: 120px;
    height: 120px;
}

.circle-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.06);
    stroke-width: 10px;
}

.circle-fill {
    fill: none;
    stroke: url(#cyan-purple-grad); /* Assigned dynamically in JS or styled */
    stroke: var(--accent-purple);
    stroke-width: 10px;
    stroke-linecap: round;
    stroke-dasharray: 314; /* 2 * PI * 50 */
    transition: stroke-dashoffset 1s ease-out;
}

.circular-progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    display: flex;
    flex-direction: column;
}

.victory-level-label {
    font-size: 0.65rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 600;
}

.victory-level-val {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.1;
}

.progress-details-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--text-primary);
    text-align: left;
}

.victory-actions {
    display: flex;
    justify-content: center;
}

/* Level Up overlay celebration */
.level-up-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(5, 5, 10, 0.9);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(12px);
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.level-up-overlay.visible {
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
}

.level-up-card {
    text-align: center;
    max-width: 450px;
    width: 90%;
    padding: 40px 30px;
    border-color: var(--accent-purple);
    box-shadow: 0 0 40px var(--accent-purple-glow);
    background: hsla(224, 71%, 8%, 0.95);
    transform: scale(0.85) translateY(10px);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.level-up-overlay.visible .level-up-card {
    transform: scale(1) translateY(0);
}

.level-up-magic-icon {
    font-size: 3.5rem;
    color: var(--accent-purple);
    margin-bottom: 15px;
    filter: drop-shadow(0 0 10px var(--accent-purple-glow));
}

.level-up-card h2 {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    color: white;
    margin-bottom: 15px;
}

.level-up-badge {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 2rem;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    box-shadow: 0 0 20px var(--accent-purple-glow);
    border: 2px solid white;
}

.level-up-subtitle {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 20px;
}

.unlocked-features {
    background: hsla(0, 0%, 0%, 0.3);
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 25px;
    text-align: left;
    border: 1px solid var(--border-glass);
}

.unlock-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.unlock-item i {
    color: var(--state-success);
}

/* Settings Modal Backdrop & Layout */
.settings-modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(5, 5, 10, 0.7);
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(6px);
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.settings-modal-backdrop.visible {
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
}

.settings-modal {
    max-width: 500px;
    width: 90%;
    padding: 30px;
    transform: scale(0.9) translateY(-20px);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.settings-modal-backdrop.visible .settings-modal {
    transform: scale(1) translateY(0);
}

.settings-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 12px;
    margin-bottom: 20px;
}

.settings-modal-header h3 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
}

.settings-modal-header h3 i {
    color: var(--accent-cyan);
    margin-right: 6px;
}

.settings-modal-body {
    margin-bottom: 25px;
}

.text-input {
    width: 100%;
    background: hsla(0, 0%, 0%, 0.3);
    border: 1px solid var(--border-glass);
    color: white;
    padding: 12px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: var(--font-body);
    transition: var(--transition-smooth);
    margin-bottom: 8px;
}

.text-input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 8px var(--accent-cyan-glow);
}

.help-text {
    display: block;
    font-size: 0.78rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.form-group-row {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.form-group-row .btn-secondary {
    flex: 1;
}

.settings-modal-footer {
    display: flex;
    justify-content: flex-end;
}

/* Footer Section */
.app-footer {
    border-top: 1px solid var(--border-glass);
    padding-top: 15px;
    margin-top: 30px;
    text-align: center;
    z-index: 5;
}

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

/* Responsive Breakpoints */
@media (max-width: 900px) {
    .landing-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    body {
        font-size: 15px;
    }
    
    .app-header {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }
    
    .header-logo {
        justify-content: center;
    }
    
    .header-stats {
        justify-content: space-around;
        flex-wrap: wrap;
    }
    
    .landing-hero h1 {
        font-size: 2rem;
    }
    
    .story-body-container {
        font-size: 1.05rem;
    }
    
    .speed-match-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .victory-progress-section {
        flex-direction: column;
        gap: 20px;
    }
    
    .progress-details-text {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .genre-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .demo-buttons-container {
        flex-direction: column;
    }
}

/* Speed Match Timer pulse warning under 5s */
.speed-match-timer-container.warning-pulse .timer-bar-fill {
    background: linear-gradient(90deg, var(--state-failure), var(--accent-gold)) !important;
    animation: barWarningPulse 0.5s infinite alternate;
}

.speed-match-timer-container.warning-pulse .timer-label {
    color: var(--state-failure);
    animation: textWarningPulse 0.5s infinite alternate;
}

@keyframes barWarningPulse {
    0% { filter: drop-shadow(0 0 2px var(--state-failure-glow)); }
    100% { filter: drop-shadow(0 0 8px var(--state-failure)); }
}

@keyframes textWarningPulse {
    0% { transform: scale(1); }
    100% { transform: scale(1.05); }
}

/* Floating Gain Indicators */
.floating-gain-indicator {
    position: absolute;
    pointer-events: none;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.25rem;
    z-index: 2000;
    animation: floatUpFade 1.2s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

.floating-gain-indicator.xp-gain {
    color: var(--accent-cyan);
    text-shadow: 0 0 8px var(--accent-cyan-glow);
}

.floating-gain-indicator.coins-gain {
    color: var(--accent-gold);
    text-shadow: 0 0 8px var(--accent-gold-glow);
}

.floating-gain-indicator.penalty-gain {
    color: var(--state-failure);
    text-shadow: 0 0 8px var(--state-failure-glow);
}

@keyframes floatUpFade {
    0% {
        opacity: 0;
        transform: translateY(0) scale(0.8);
    }
    15% {
        opacity: 1;
        transform: translateY(-12px) scale(1.1);
    }
    100% {
        opacity: 0;
        transform: translateY(-60px) scale(0.9);
    }
}