/* MAI Public Site — Light, welcoming theme */
:root {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent: #3b82f6;
    --accent-light: #dbeafe;
    --accent-purple: #8b5cf6;
    --accent-purple-light: #ede9fe;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.08);
}

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

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

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Nav */
nav {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
}
.nav-inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}
.nav-logo { width: 32px; height: 32px; border-radius: 6px; }
.nav-links { display: flex; align-items: center; gap: 1.5rem; }
.nav-links a { color: var(--text-secondary); font-size: 0.9rem; }
.nav-links a:hover { color: var(--text-primary); text-decoration: none; }
.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-purple));
    color: #fff !important;
    padding: 0.4rem 1rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.85rem;
    transition: opacity 0.2s;
}
.btn-primary:hover { opacity: 0.9; text-decoration: none !important; }

/* Hero */
.hero {
    padding: 5rem 1.5rem 4rem;
    text-align: center;
    background: linear-gradient(180deg, var(--accent-light) 0%, var(--bg-primary) 60%);
}
.hero-inner { max-width: 720px; margin: 0 auto; }
.hero-logo {
    width: 160px;
    height: 160px;
    margin-bottom: 1.5rem;
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
}
.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    background: linear-gradient(135deg, var(--accent), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-sub {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}
.status-bar {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 0.4rem 1.2rem;
    border-radius: 20px;
    margin-bottom: 3rem;
}
.status-dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}
.hero-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    text-align: left;
}
.feature {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: box-shadow 0.2s, transform 0.2s;
}
.feature:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}
.feature-icon { width: 36px; height: 36px; margin-bottom: 0.5rem; }
.feature h3 {
    font-size: 1rem;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
}
.feature p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Capabilities */
.capabilities {
    padding: 4rem 1.5rem;
    border-top: 1px solid var(--border);
}
.capabilities-inner {
    max-width: 960px;
    margin: 0 auto;
    text-align: center;
}
.capabilities-inner h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}
.capabilities-sub {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
}
.capability-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
    text-align: left;
}
.capability {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
    box-shadow: var(--shadow);
    transition: box-shadow 0.2s, transform 0.2s;
}
.capability:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}
.capability-icon { width: 36px; height: 36px; margin-bottom: 0.5rem; }
.capability h3 {
    font-size: 0.95rem;
    margin-bottom: 0.3rem;
    color: var(--text-primary);
}
.capability p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Construct */
.construct {
    padding: 4rem 1.5rem;
    border-top: 1px solid var(--border);
    background: linear-gradient(180deg, var(--accent-purple-light) 0%, var(--bg-primary) 100%);
}
.construct-inner {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
}
.construct-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
}
.construct-inner h2 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}
.construct-inner p {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    line-height: 1.7;
}

/* About & Contact */
.about, .contact {
    padding: 3rem 1.5rem;
}
.about { border-top: 1px solid var(--border); }
.contact { border-top: 1px solid var(--border); }
.about-inner, .contact-inner {
    max-width: 640px;
    margin: 0 auto;
}
.about h2, .contact h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}
.about p, .contact p {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

/* Footer */
footer {
    margin-top: auto;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 1.5rem;
}
.footer-inner {
    max-width: 960px;
    margin: 0 auto;
    text-align: center;
}
.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 0.75rem;
}
.footer-links a { color: var(--text-secondary); font-size: 0.85rem; }
.footer-links a:hover { color: var(--text-primary); }
.footer-copy { color: var(--text-secondary); font-size: 0.8rem; }

/* Legal pages */
.legal {
    padding: 3rem 1.5rem;
    max-width: 720px;
    margin: 0 auto;
}
.legal h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}
.legal .updated {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 2rem;
}
.legal h2 {
    font-size: 1.2rem;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--accent);
}
.legal p, .legal li {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}
.legal ul {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}
.legal li { margin-bottom: 0.4rem; }

/* Responsive */
@media (max-width: 900px) {
    .capability-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .hero h1 { font-size: 2rem; }
    .hero-sub { font-size: 1rem; }
    .hero-features { grid-template-columns: 1fr; }
    .capability-grid { grid-template-columns: 1fr; }
    .nav-links { gap: 1rem; }
    .footer-links { flex-direction: column; gap: 0.5rem; }
}