:root {
    /* Light mode colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --border: #e5e7eb;
    --shadow: rgba(0, 0, 0, 0.1);
    --gradient-start: #3b82f6;
    --gradient-end: #8b5cf6;
}

[data-theme="dark"] {
    /* Dark mode colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent: #60a5fa;
    --accent-hover: #3b82f6;
    --border: #334155;
    --shadow: rgba(0, 0, 0, 0.3);
    --gradient-start: #60a5fa;
    --gradient-end: #a78bfa;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 4rem;
}

.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px var(--shadow);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    color: var(--text-primary);
    transition: opacity 0.3s ease, transform 0.3s ease;
    position: absolute;
}

.moon-icon {
    opacity: 0;
    transform: rotate(90deg);
}

[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: rotate(90deg);
}

[data-theme="dark"] .moon-icon {
    opacity: 1;
    transform: rotate(0deg);
}

main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 0;
}

.content {
    text-align: center;
    max-width: 800px;
    animation: fadeInUp 0.8s ease-out;
}

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

.logo {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    animation: fadeInUp 0.8s ease-out 0.1s both;
}

.tagline {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--text-primary);
    line-height: 1.2;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.description {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 3rem;
    line-height: 1.8;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

.coming-soon {
    margin-top: 3rem;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.coming-soon-badge {
    display: inline-block;
    padding: 0.75rem 2rem;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    box-shadow: 0 4px 15px var(--shadow);
    position: relative;
    overflow: hidden;
}

.coming-soon-badge::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: auto;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 1.5rem;
    }

    header {
        margin-bottom: 2rem;
    }

    .content {
        padding: 1rem 0;
    }

    .description {
        margin-bottom: 2rem;
    }
}

/* Smooth scroll */
html {
    scroll-behavior: smooth;
}