:root {
    --bg-color: #f7f5f0;
    --text-primary: #4a4843;
    --text-secondary: #76736a;
    --accent-color: #a4b39b;
    --accent-hover: #8f9e86;
    --card-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(255, 255, 255, 0.4);
    --glass-shadow: 0 8px 32px 0 rgba(164, 179, 155, 0.15);
    --nav-bg: rgba(247, 245, 240, 0.8);
    --blob-1: #e3ebd8;
    --blob-2: #f0e6d5;
    --icon-bg: rgba(164, 179, 155, 0.2);
    --icon-color: #728269;
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-primary: #f0f0f0;
    --text-secondary: #a8a8a8;
    --accent-color: #7d8c74;
    --accent-hover: #93a38a;
    --card-bg: rgba(30, 30, 30, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --nav-bg: rgba(26, 26, 26, 0.8);
    --blob-1: #2a3325;
    --blob-2: #332d25;
    --icon-bg: rgba(125, 140, 116, 0.2);
    --icon-color: #93a38a;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Abstract Background Blobs */
.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: float 20s infinite ease-in-out;
}

.blob-1 {
    top: -10%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: var(--blob-1);
}

.blob-2 {
    bottom: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: var(--blob-2);
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -50px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    transition: all 0.3s ease;
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.5px;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.2s ease;
}

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

/* Buttons */
.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--accent-color);
    color: white !important;
    border: 1px solid transparent;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(5px);
}

.btn-secondary:hover {
    background-color: var(--icon-bg);
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.large {
    padding: 0.8rem 1.8rem;
    font-size: 1.1rem;
}

/* Main Layout */
main {
    padding-top: 100px; /* Space for navbar */
}

/* Hero Section */
.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 4rem 5% 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 600;
    letter-spacing: -1px;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 2.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 4rem;
}

.hero-image-container {
    width: 100%;
    max-width: 900px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--glass-shadow);
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 1rem;
}

.hero-image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    display: block;
}

/* Features Section */
.features {
    max-width: 1200px;
    margin: 5rem auto;
    padding: 0 5%;
    text-align: center;
}

.features h2 {
    font-size: 2.2rem;
    margin-bottom: 3rem;
    font-weight: 600;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    text-align: left;
    box-shadow: var(--glass-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
    display: flex;
    flex-direction: column;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px var(--glass-shadow);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background-color: var(--icon-bg);
    color: var(--icon-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.2rem;
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.05);
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
    font-weight: 600;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid var(--glass-border);
}

/* Animations */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.8s ease forwards;
}

.slide-up {
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.8s ease forwards;
}

.slide-up-delayed {
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.8s ease forwards 0.3s;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

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

/* Intersection Observer utility class */
.fade-in-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
    }
    .hero-buttons {
        flex-direction: column;
    }
    .btn-primary, .btn-secondary {
        width: 100%;
        text-align: center;
    }
}

/* Theme Toggle Button */
.theme-btn {
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.theme-btn:hover {
    background-color: var(--icon-bg);
    color: var(--accent-color);
}