/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1a1a2e;
    --secondary-color: #16213e;
    --accent-color: #4A90E2;
    --text-color: #e4e4e4;
    --text-secondary: #a0a0a0;
    --background: #0a0a0f;
    --card-background: #1a1a2e;
    --border-color: #2a2a3e;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background);
}

/* Header */
header {
    padding: 2rem 0;
    border-bottom: 1px solid var(--border-color);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--text-color);
}

/* Main Content */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 4rem 0;
    border-bottom: 1px solid var(--border-color);
}

section:last-of-type {
    border-bottom: none;
}

/* Hero Section */
.hero {
    padding: 6rem 0 5rem;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 300;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    font-weight: 300;
}

/* Section Headers */
h2 {
    font-size: 2rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    max-width: 800px;
}

/* Problem Section */
.problem {
    max-width: 800px;
    margin: 0 auto;
}

/* Solution Grid */
.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.solution-item {
    background: var(--card-background);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.solution-item h3 {
    color: var(--text-color);
}

.solution-item p {
    margin-bottom: 0;
}

/* Approach Section */
.approach {
    max-width: 800px;
    margin: 0 auto;
}

/* About Section */
.about {
    max-width: 800px;
    margin: 0 auto;
}

/* Status Section */
.status {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.status h2 {
    margin-bottom: 1rem;
}

.status p {
    margin: 0 auto;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: all 0.2s;
}

a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    text-align: center;
    padding: 3rem 2rem;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}

footer p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0 auto;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    section {
        padding: 3rem 0;
    }

    .hero {
        padding: 4rem 0 3rem;
    }

    .solution-grid {
        grid-template-columns: 1fr;
    }
}