:root {
    --primary-color: #1a1a2e;
    --accent-color: #c5a059; /* Muted Gold */
    --text-light: #f5f5f7;
    --text-dark: #1d1d1f;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --transition-speed: 0.4s;
    --font-heading: 'Zen Old Mincho', serif;
    --font-body: 'Inter', sans-serif;
}

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

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

/* Typography */
h1, h2, h3 {
    font-family: var(--font-heading);
    font-weight: 700;
}

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

/* Header */
header {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 2rem;
    z-index: 1000;
    transition: background-color 0.3s ease, backdrop-filter 0.3s ease;
}

header.scrolled {
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 32px;
    width: 32px;
    border-radius: 8px;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

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

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

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('images/hero_bg.png');
    background-size: cover;
    background-position: center;
    z-index: -2;
}

/* Dark overlay gradient */
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(26, 26, 46, 0.3), rgba(26, 26, 46, 0.6));
    z-index: -1;
}

.hero-content {
    text-align: center;
    color: var(--text-light);
    max-width: 800px;
    padding: 0 20px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards 0.5s;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    line-height: 1.2;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

.hero-btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: var(--accent-color);
    color: #fff;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    border: none;
    box-shadow: 0 4px 15px rgba(197, 160, 89, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(197, 160, 89, 0.6);
}

/* Features Section */
.features {
    padding: 8rem 2rem;
    background-color: #fcfcfc;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    margin-bottom: 5rem;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.section-title p {
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.feature-card {
    background: #fff;
    padding: 3rem 2rem;
    border-radius: 24px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.05);
    text-align: center;
    transition: transform 0.3s ease;
    opacity: 0; /* Hidden for scroll animation */
    transform: translateY(30px);
}

.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    color: var(--accent-color);
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
    color: var(--primary-color);
}

.feature-card p {
    color: #666;
    line-height: 1.7;
}

/* App Showcase / Call to Action */
.app-cta {
    background-color: var(--primary-color);
    color: var(--text-light);
    padding: 6rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.app-cta-content {
    position: relative;
    z-index: 10;
    max-width: 800px;
    margin: 0 auto;
}

.app-icon-large {
    width: 120px;
    height: 120px;
    border-radius: 28px;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.app-cta h2 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.app-cta p {
    margin-bottom: 3rem;
    opacity: 0.8;
    font-size: 1.1rem;
}

/* Footer */
footer {
    background-color: #111;
    color: #888;
    padding: 3rem 2rem;
    text-align: center;
}

.footer-links {
    margin-bottom: 1.5rem;
}

.footer-links a {
    margin: 0 10px;
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: #fff;
}

.copyright {
    font-size: 0.8rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .nav-links {
        display: none; /* Simplify for MVP */
    }
}