:root {
    --bg-color: #0a0a0f;
    --text-color: #e2e8f0;
    --text-muted: #94a3b8;
    --primary-color: #7c3aed;
    --primary-light: #a78bfa;
    --secondary-color: #06b6d4;
    --accent-glow: rgba(124, 58, 237, 0.5);

    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;

    --container-width: 1200px;
    --header-height: 80px;
}

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

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: #fff;
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

/* Utils */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-secondary {
    background: transparent;
    color: white;
}

.btn-secondary:hover {
    color: var(--primary-light);
}

.btn-outline {
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.05);
    color: white;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.1rem;
}

/* Header */
.header {
    width: 100%;
    height: var(--header-height);
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.logo .dot {
    color: var(--primary-color);
}

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

.nav-link {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.nav-link:hover {
    color: white;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background-color: white;
    display: block;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: var(--header-height);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100vw;
    height: 100vh;
    background: radial-gradient(circle at 50% 50%, rgba(124, 58, 237, 0.15) 0%, rgba(10, 10, 15, 0) 60%);
    z-index: -1;
    pointer-events: none;
}

.hero-content {
    text-align: center;
    z-index: 1;
    max-width: 800px;
}

.hero-title {
    font-size: 4rem;
    margin-bottom: 24px;
}

.hero-title em {
    font-style: italic;
    background: linear-gradient(to right, var(--primary-light), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* Sections */
.section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 60px;
    background: linear-gradient(to right, #fff, var(--text-muted));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 32px;
    border-radius: 16px;
    transition: transform 0.3s ease, background 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--primary-light);
}

.feature-card p {
    color: var(--text-muted);
}

/* Demo Section / Journal UI */
.demo-wrapper {
    max-width: 1000px;
    margin: 0 auto;
    background: #1a1a20;
    /* Darker card background */
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    font-family: var(--font-body);
}

.demo-controls {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.demo-btn {
    flex: 1;
    background: transparent;
    border: none;
    padding: 16px;
    color: var(--text-muted);
    font-family: var(--font-heading);
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
}

.demo-btn:hover {
    color: white;
    background: rgba(255, 255, 255, 0.05);
}

.demo-btn.active {
    color: var(--primary-light);
    border-bottom-color: var(--primary-color);
    background: rgba(124, 58, 237, 0.05);
}

.journal-interface {
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.journal-header {
    display: flex;
    gap: 16px;
    font-size: 0.9rem;
    color: var(--text-muted);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 16px;
    font-family: monospace;
}

.turn-indicator {
    font-weight: 700;
    color: #fff;
}

.journal-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 32px;
}

.story-text {
    font-size: 1rem;
    line-height: 1.8;
    color: #cbd5e1;
}

.story-text p {
    margin-bottom: 16px;
}

.story-text em {
    color: var(--text-muted);
    font-style: italic;
    display: block;
    margin-bottom: 24px;
    border-left: 2px solid var(--primary-color);
    padding-left: 12px;
}

.journal-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease;
}

.journal-image:hover {
    transform: scale(1.02);
}

.choices-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 24px;
}

.choice-btn {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #e2e8f0;
    padding: 16px 20px;
    border-radius: 6px;
    text-align: left;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.choice-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
    color: #fff;
}

.input-choice {
    font-style: italic;
    color: var(--text-muted);
}

/* Footer */
.footer {
    padding: 40px 0;
    margin-top: 80px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .journal-content {
        grid-template-columns: 1fr;
        /* Stack text and image */
    }

    .journal-image {
        order: -1;
        aspect-ratio: 16/9;
        /* Better for mobile */
    }
}