:root {
    --bg-color: #faf9f6; /* Premium off-white / pearl */
    --text-primary: #1a1a1a; /* Very dark grey, almost black */
    --text-secondary: #5a5a5a;
    --accent-color: #1c352d; /* Deep forest green */
    --accent-gradient: linear-gradient(135deg, #2a4c41, #13241f); /* Forest green gradient for accents */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.08); /* Dark subtle border for glass effects in light theme */
}

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

body {
    font-family: 'Source Serif 4', 'source-serif-pro', Georgia, Cambria, "Times New Roman", Times, serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1 {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 600;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--text-primary);
}

p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    background: rgba(250, 249, 246, 0.85); /* off-white tint */
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--glass-border);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    font-family: system-ui, -apple-system, sans-serif; /* Keep logos/UI clean and sans */
}

.logo-icon {
    color: #2a4c41;
    font-size: 1.2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-right: 2.5rem;
    font-weight: 600;
    transition: color 0.3s ease;
    font-family: system-ui, -apple-system, sans-serif; /* UI Elements look faster in modern sans */
    font-size: 0.95rem;
}

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

.btn-primary {
    background: var(--text-primary); /* Bold black button in a white theme looks exceedingly premium */
    color: white;
    padding: 0.8rem 1.75rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    border: none;
    cursor: pointer;
    font-family: system-ui, -apple-system, sans-serif;
    font-size: 0.95rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5%;
    position: relative;
    padding-top: 100px;
}

.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    left: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(42, 76, 65, 0.05) 0%, rgba(250, 249, 246, 0) 60%);
    z-index: -1;
    filter: blur(60px);
}

.hero-content {
    flex: 1;
    max-width: 650px;
    z-index: 1;
}

.waitlist-form {
    display: flex;
    gap: 1rem;
    margin-top: 2.5rem;
}

.waitlist-form input {
    flex: 1;
    padding: 1.1rem 1.5rem;
    border-radius: 8px;
    border: 1px solid rgba(0,0,0,0.15);
    background: #ffffff;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-family: system-ui, -apple-system, sans-serif;
    outline: none;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.waitlist-form input::placeholder {
    color: #999;
}

.waitlist-form input:focus {
    border-color: var(--text-primary);
    box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.05); /* very soft grey ring */
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.glass-card {
    width: 380px;
    height: 480px;
    background: linear-gradient(145deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.6) 100%);
    border: 1px solid rgba(255,255,255,0.8);
    border-radius: 24px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 30px 60px rgba(0,0,0,0.08), inset 0 0 0 1px rgba(0,0,0,0.05);
    position: relative;
    overflow: hidden;
    transform: perspective(1000px) rotateY(-15deg) rotateX(5deg);
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.6s ease;
}

.glass-card:hover {
    transform: perspective(1000px) rotateY(-5deg) rotateX(2deg) translateY(-10px);
    box-shadow: 0 40px 80px rgba(0,0,0,0.12), inset 0 0 0 1px rgba(0,0,0,0.05);
}

.glass-card .glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 250px;
    height: 250px;
    background: var(--accent-gradient);
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15; /* Subtler in light mode */
    animation: pulseGlow 5s infinite alternate;
}

.card-content {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.card-line {
    height: 8px;
    background: rgba(0,0,0,0.1);
    border-radius: 4px;
    margin-bottom: 1rem;
    width: 100%;
}

.card-line.short {
    width: 60%;
}

.circle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--accent-gradient);
    position: absolute;
    top: 2rem;
    right: 2rem;
    opacity: 0.9;
}

@keyframes pulseGlow {
    0% { opacity: 0.1; transform: translate(-50%, -50%) scale(0.9); }
    100% { opacity: 0.2; transform: translate(-50%, -50%) scale(1.1); }
}

/* Features */
.features {
    padding: 8rem 5%;
    position: relative;
    background: radial-gradient(circle at bottom right, rgba(42, 76, 65, 0.03) 0%, transparent 50%);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: #ffffff;
    border: 1px solid rgba(0,0,0,0.06);
    padding: 3rem 2.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.02);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.06);
}

.feature-card h3 {
    font-size: 1.6rem;
    margin-bottom: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.feature-card p {
    font-size: 1.1rem;
    margin-bottom: 0;
    line-height: 1.7;
}

/* Footer */
.footer {
    padding: 4rem 5%;
    border-top: 1px solid rgba(0,0,0,0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    background: #ffffff;
    font-family: system-ui, -apple-system, sans-serif;
    font-size: 0.95rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 2rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--text-primary);
}

/* Responsive */
@media (max-width: 992px) {
    .glass-card {
        width: 320px;
        height: 420px;
    }
}

@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 150px;
        padding-bottom: 50px;
    }
    
    .hero-content {
        margin-bottom: 5rem;
    }
    
    .waitlist-form {
        flex-direction: column;
        align-items: center;
    }
    
    .waitlist-form input {
        width: 100%;
        max-width: 450px;
    }
    
    .btn-primary {
        width: 100%;
        max-width: 450px;
    }
    
    .nav-links {
        display: none;
    }
    
    .footer {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
    
    .footer-links a {
        margin: 0 1rem;
    }
}