/* --- CSS VARIABLES & SYSTEM DESIGN --- */
:root {
    --bg-main: #0a0a0f;
    --bg-card: rgba(20, 20, 30, 0.6);
    --bg-card-hover: rgba(28, 28, 45, 0.8);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(124, 58, 237, 0.3);
    
    --color-primary: #7c3aed; /* Purple Neon */
    --color-primary-glow: rgba(124, 58, 237, 0.5);
    --color-secondary: #06b6d4; /* Cyan Neon */
    --color-secondary-glow: rgba(6, 182, 212, 0.4);
    
    --color-success: #10b981;
    --color-danger: #ef4444;
    --color-text-main: #f3f4f6;
    --color-text-muted: #9ca3af;
    
    --font-heading: 'Outfit', 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius-lg: 16px;
    --border-radius-md: 8px;
    --border-radius-sm: 4px;
}

/* --- RESET & GLOBAL STYLES --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--bg-main);
    color: var(--color-text-main);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-smooth);
}

code {
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 6px;
    border-radius: var(--border-radius-sm);
    font-family: monospace;
    font-size: 0.9em;
    color: var(--color-secondary);
}

/* --- GLOWING BACKGROUND --- */
.glow-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.glow-sphere {
    position: absolute;
    border-radius: 50%;
    filter: blur(140px);
    opacity: 0.15;
}

.sphere-1 {
    width: 600px;
    height: 600px;
    background: var(--color-primary);
    top: -100px;
    right: -100px;
    animation: pulse 12s infinite alternate;
}

.sphere-2 {
    width: 500px;
    height: 500px;
    background: var(--color-secondary);
    top: 800px;
    left: -150px;
    animation: pulse 10s infinite alternate-reverse;
}

@keyframes pulse {
    0% { transform: scale(1) translate(0, 0); opacity: 0.12; }
    100% { transform: scale(1.2) translate(50px, 30px); opacity: 0.2; }
}

/* --- BUTTONS --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 600;
    padding: 10px 20px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    font-size: 0.95rem;
    gap: 8px;
}

.btn-large {
    padding: 14px 28px;
    font-size: 1.05rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), #6366f1);
    color: #fff;
    box-shadow: 0 4px 20px var(--color-primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(124, 58, 237, 0.7);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--color-secondary), #0891b2);
    color: #fff;
    box-shadow: 0 4px 20px var(--color-secondary-glow);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(6, 182, 212, 0.6);
}

.btn-outline {
    background: transparent;
    color: var(--color-text-main);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-text-muted);
}

.btn-full {
    width: 100%;
}

.btn-success {
    background-color: var(--color-success);
    color: white;
}

.btn-success:hover {
    background-color: #059669;
}

.btn-danger {
    background-color: var(--color-danger);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-icon {
    flex-shrink: 0;
}

/* --- NAVIGATION BAR --- */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    transition: var(--transition-smooth);
}

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

.logo {
    display: flex;
    align-items: center;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    gap: 8px;
}

.logo-icon {
    font-size: 1.8rem;
    background: linear-gradient(135deg, #facc15, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.highlight {
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.nav-links a:hover {
    color: var(--color-text-main);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle .bar {
    width: 100%;
    height: 2px;
    background-color: var(--color-text-main);
    transition: var(--transition-smooth);
}

/* --- HERO SECTION --- */
.hero-section {
    padding: 80px 0 100px 0;
    position: relative;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 64px;
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(124, 58, 237, 0.15);
    border: 1px solid rgba(124, 58, 237, 0.3);
    border-radius: 50px;
    font-size: 0.85rem;
    color: #a78bfa;
    font-weight: 600;
    margin-bottom: 24px;
    font-family: var(--font-heading);
}

.hero-content h1 {
    font-family: var(--font-heading);
    font-size: 3.8rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -1.5px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    margin-bottom: 40px;
    max-width: 580px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.hero-meta-info {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    display: flex;
    gap: 12px;
}

/* App Mockup UI */
.hero-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.app-mockup {
    width: 100%;
    max-width: 440px;
    background: rgba(15, 15, 23, 0.85);
    border: 1px solid var(--border-glow);
    border-radius: 12px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 40px rgba(124, 58, 237, 0.15);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    overflow: hidden;
    transition: opacity 0.5s ease;
    opacity: 0.85; /* Visual cue of overlay opacity */
}

.app-mockup:hover {
    opacity: 1;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6), 0 0 50px rgba(124, 58, 237, 0.25);
}

.mockup-header {
    background: #11111a;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mockup-icon {
    font-size: 1rem;
    margin-right: 8px;
}

.mockup-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-muted);
    flex-grow: 1;
}

.mockup-close {
    font-size: 0.8rem;
    cursor: pointer;
    color: var(--color-text-muted);
}

.mockup-body {
    padding: 16px;
}

.mockup-deck-select {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.mockup-deck-select .label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.mockup-deck-select .select-box {
    flex-grow: 1;
    background: #161622;
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--color-text-main);
}

.mockup-info-bar {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 8px;
    margin-bottom: 16px;
}

.mockup-info-bar .stats {
    color: var(--color-secondary);
}

.mockup-card-container {
    background: #161622;
    border-radius: 8px;
    padding: 24px 16px;
    text-align: center;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px dashed rgba(255, 255, 255, 0.1);
    margin-bottom: 16px;
}

.card-front-content .word {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.card-front-content .ipa {
    font-size: 0.9rem;
    color: var(--color-secondary);
    margin-bottom: 8px;
}

.card-front-content .tag {
    font-size: 0.7rem;
    background: rgba(255,255,255,0.05);
    padding: 2px 8px;
    border-radius: 4px;
    color: var(--color-text-muted);
}

.mockup-input-area {
    margin-bottom: 16px;
}

.mockup-input-area .input-label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: 6px;
}

.mock-input {
    background: #1c1c2b;
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.mockup-footer-buttons {
    display: flex;
    justify-content: space-between;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 12px;
    margin-bottom: 16px;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.mockup-footer-buttons span {
    cursor: pointer;
}

.mockup-footer-buttons span:hover {
    color: #fff;
}

.mockup-footer-buttons .active-badge {
    background: var(--color-primary);
    color: #fff;
    padding: 1px 6px;
    border-radius: 4px;
}

.mockup-rating-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.btn-mock-rating {
    border: none;
    padding: 8px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    color: #fff;
}

.btn-mock-rating.rated-good {
    background: var(--color-success);
}

.btn-mock-rating.rated-again {
    background: var(--color-danger);
}

.fading-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    max-width: 400px;
    text-align: center;
}

.indicator-dot {
    width: 8px;
    height: 8px;
    background-color: var(--color-secondary);
    border-radius: 50%;
    flex-shrink: 0;
}

/* animate-ping custom */
@keyframes ping {
    0% { transform: scale(1); opacity: 1; }
    75%, 100% { transform: scale(2.5); opacity: 0; }
}
.animate-ping {
    animation: ping 1.5s cubic-bezier(0, 0, 0.2, 1) infinite;
}

/* --- SECTION TITLE GENERAL --- */
.section-title-wrapper {
    text-align: center;
    margin-bottom: 56px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
}

/* --- FEATURES SECTION --- */
.features-section {
    padding: 100px 0;
    background-color: rgba(13, 13, 21, 0.5);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 32px;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-glow);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.1);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 20px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.feature-card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    flex-grow: 1;
}

/* --- SIMULATOR SECTION --- */
.simulator-section {
    padding: 100px 0;
}

.simulator-layout {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 64px;
    align-items: center;
}

.simulator-info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.info-box {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 28px;
}

.info-box h4 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    color: var(--color-secondary);
    margin-bottom: 16px;
}

.info-box ol {
    padding-left: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.info-box li {
    font-size: 0.95rem;
    color: var(--color-text-muted);
}

.info-box li strong {
    color: var(--color-text-main);
}

.simulator-stats-display {
    display: flex;
    gap: 16px;
}

.stat-pill {
    flex: 1;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

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

.stat-val {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
}

.highlight-green { color: var(--color-success); }
.highlight-purple { color: #c084fc; }

/* Interactive simulator App */
.simulator-app-container {
    display: flex;
    justify-content: center;
}

.sim-app-window {
    width: 100%;
    max-width: 460px;
    background: #0f0f18;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6);
    overflow: hidden;
}

.sim-header {
    background: #151522;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.sim-logo {
    color: #facc15;
}

.sim-badge {
    margin-left: auto;
    font-size: 0.75rem;
    background: rgba(6, 182, 212, 0.15);
    border: 1px solid rgba(6, 182, 212, 0.3);
    color: var(--color-secondary);
    padding: 2px 8px;
    border-radius: 50px;
}

.sim-body {
    padding: 24px;
}

/* 3D card flip wrapper */
.sim-card-wrapper {
    perspective: 1000px;
    width: 100%;
    height: 180px;
    margin-bottom: 24px;
}

.sim-card {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.sim-card.flipped {
    transform: rotateY(180deg);
}

.sim-card-side {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.sim-card-side.front {
    background: linear-gradient(135deg, #181829, #1c1c38);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.sim-card-side.back {
    background: linear-gradient(135deg, #1e1b29, #251e3d);
    transform: rotateY(180deg);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.sim-deck-name {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.sim-card-content {
    text-align: center;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.sim-card-content h3 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.sim-card-side.back h3 {
    color: #fff;
    font-size: 1.6rem;
}

.sim-card-content .phonetic {
    font-size: 1rem;
    color: var(--color-secondary);
    margin-bottom: 8px;
}

.sim-card-content .tag {
    font-size: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    padding: 2px 8px;
    border-radius: 4px;
    color: var(--color-text-muted);
}

.sim-answer-status {
    text-align: center;
    padding: 6px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-top: 10px;
}

.sim-answer-status.correct {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--color-success);
}

.sim-answer-status.wrong {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--color-danger);
}

.example-en {
    margin-top: 8px;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.example-vi {
    font-size: 0.8rem;
    color: #9ca3af;
}

/* Input / Interaction controls */
.sim-input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sim-input-wrapper label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.sim-input-wrapper .input-group {
    display: flex;
    gap: 8px;
}

.sim-input-wrapper input {
    flex-grow: 1;
    background: #161622;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #fff;
    padding: 10px 14px;
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

.sim-input-wrapper input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 10px rgba(124, 58, 237, 0.25);
}

.sim-eval-wrapper {
    text-align: center;
}

.eval-prompt {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.eval-buttons {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 12px;
}

/* --- VIDEO TUTORIALS SECTION --- */
.tutorials-section {
    padding: 100px 0;
    background-color: rgba(13, 13, 21, 0.5);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 32px;
}

.video-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: var(--transition-smooth);
}

.video-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-glow);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    height: 0;
    background-color: #000;
}

.video-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-info {
    padding: 24px;
}

.video-info h4 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.video-info p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* --- PRICING SECTION --- */
.pricing-section {
    padding: 100px 0;
}

.pricing-grid {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

.pricing-card {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    position: relative;
    display: flex;
    flex-direction: column;
    transition: var(--transition-smooth);
}

.pricing-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
}

.pricing-card.featured {
    border: 2px solid var(--color-primary);
    box-shadow: 0 10px 40px rgba(124, 58, 237, 0.15);
    background: linear-gradient(180deg, rgba(20, 20, 35, 0.8) 0%, rgba(10, 10, 15, 0.9) 100%);
}

.featured-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: #fff;
    padding: 4px 16px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    font-family: var(--font-heading);
    text-transform: uppercase;
}

.pricing-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 24px;
    margin-bottom: 24px;
}

.pricing-header h3 {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.pricing-header .price {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    color: #fff;
    margin: 16px 0;
}

.pricing-header .price .period {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--color-text-muted);
}

.pricing-header p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.pricing-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 40px;
    flex-grow: 1;
}

.pricing-features li {
    font-size: 0.95rem;
}

.pricing-features li.disabled {
    color: rgba(255, 255, 255, 0.25);
    text-decoration: line-through;
}

/* --- DOWNLOAD SECTION --- */
.download-section {
    padding: 100px 0;
}

.download-card {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.08) 0%, rgba(6, 182, 212, 0.08) 100%);
    border: 1px solid rgba(124, 58, 237, 0.2);
    border-radius: 24px;
    padding: 48px;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
}

.download-content h2 {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
}

.download-content p {
    color: var(--color-text-muted);
    margin-bottom: 32px;
}

.download-buttons-group {
    margin-bottom: 20px;
}

.download-btn {
    text-decoration: none;
}

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

.download-note a {
    color: var(--color-secondary);
    text-decoration: underline;
}

.setup-guide {
    background: rgba(10, 10, 15, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
    padding: 32px;
}

.setup-guide h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    margin-bottom: 16px;
}

.setup-guide ol {
    padding-left: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.setup-guide li {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* --- FOOTER --- */
footer {
    background-color: #050508;
    border-top: 1px solid var(--border-color);
    padding: 80px 0 40px 0;
}

.footer-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 64px;
}

.footer-left p {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin: 16px 0 32px 0;
    max-width: 480px;
}

.footer-left .copyright {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.2);
}

.footer-right h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.author-info {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-size: 0.95rem;
    color: var(--color-text-muted);
}

.author-info a {
    color: var(--color-secondary);
}

.author-info a:hover {
    text-decoration: underline;
}

.author-info code {
    color: var(--color-primary);
}

/* --- RESPONSIVE DESIGN (MEDIA QUERIES) --- */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }
    .hero-content h1 {
        font-size: 3rem;
    }
    .hero-desc {
        margin-left: auto;
        margin-right: auto;
    }
    .hero-actions {
        justify-content: center;
    }
    .hero-meta-info {
        justify-content: center;
    }
    
    .simulator-layout {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    .download-card {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    /* Mobile Navigation */
    .mobile-menu-toggle {
        display: flex;
    }
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: #0c0c14;
        border-bottom: 1px solid var(--border-color);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    }
    .nav-links.active {
        display: flex;
    }
    
    .hero-content h1 {
        font-size: 2.4rem;
    }
    .pricing-grid {
        flex-direction: column;
        align-items: center;
    }
    .pricing-card {
        width: 100%;
        max-width: 440px;
    }
    .footer-container {
        grid-template-columns: 1fr;
        gap: 48px;
    }
}