/* global.css - AGSI Institutional Stylesheet */
:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #111827;
    --bg-tertiary: #1f2937;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --accent: #2563eb;
    --accent-hover: #3b82f6;
    --border: rgba(255, 255, 255, 0.08);
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent: #1e40af;
    --accent-hover: #1d4ed8;
    --border: rgba(15, 23, 42, 0.08);
    --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.2s ease, color 0.2s ease;
}

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

/* Global Header & Navigation */
header {
    border-bottom: 1px solid var(--border);
    background-color: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 100;
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}
.logo {
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-primary);
    text-decoration: none;
}
.logo span { color: var(--accent); font-family: monospace; }

nav { display: flex; align-items: center; gap: 2.5rem; }
nav ul { display: flex; list-style: none; gap: 2rem; }
nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}
nav a:hover { color: var(--text-primary); }

.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all 0.2s ease;
}
.theme-toggle:hover { background-color: var(--bg-tertiary); }

/* Main Section Elements */
.section { padding: 6rem 0; border-bottom: 1px solid var(--border); }
.section-header { max-width: 700px; margin-bottom: 4rem; }
.section-header h2 { font-size: 2.25rem; font-weight: 700; margin-bottom: 1rem; letter-spacing: -0.01em; }
.section-header p { color: var(--text-secondary); font-size: 1.1rem; }

.grid-2 { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 4rem; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2.5rem; }

/* Global Footer */
footer { background-color: var(--bg-secondary); padding: 4rem 0; font-size: 0.85rem; color: var(--text-secondary); }
.footer-grid { display: flex; justify-content: space-between; align-items: center; }

@media (max-width: 968px) {
    .grid-2, .grid-3 { grid-template-columns: 1fr; gap: 3rem; }
    .nav-container { height: auto; padding: 1.5rem 0; flex-direction: column; gap: 1rem; }
}