:root {
    --bg: #f8f9fb;
    --text: #1f2937;
    --muted: #6b7280;
    --brand-900: #0a2342;
    --brand-700: #1a4b8c;
    --card: #ffffff;
    --border: #e5e7eb;
    --shadow: 0 10px 20px rgba(0,0,0,0.08);
}

/* Dark theme variables */
:root.dark {
    --bg: #0b1220;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --brand-900: #0e1a32;
    --brand-700: #2b5aa4;
    --card: #121a2a;
    --border: #1f2a44;
    --shadow: 0 10px 20px rgba(0,0,0,0.4);
}

/* Respect system preference on first load */
@media (prefers-color-scheme: dark) {
    :root:not(.light) {
        color-scheme: dark;
    }
}

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

body {
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* Header */
header {
    background: var(--brand-900);
    color: #fff;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
header h1 a { color: #fff; text-decoration: none; }
nav a { color: #cfd8e3; margin-left: 1rem; text-decoration: none; font-weight: 600; }
nav a.active, nav a:hover { color: #fff; }

/* Buttons */
.btn { background: #fff; color: var(--brand-900); padding: .7rem 1rem; border-radius: 8px; text-decoration: none; font-weight: 700; border: none; cursor: pointer; box-shadow: var(--shadow); }
.btn:hover { filter: brightness(0.95); }
.btn.small { padding: .4rem .6rem; border-radius: 6px; }

/* Inputs */
.input { padding: .6rem .8rem; border: 1px solid var(--border); background: var(--card); color: var(--text); border-radius: 8px; }

/* Hero */
.hero { text-align: center; padding: 6rem 2rem; background: linear-gradient(135deg, var(--brand-900), var(--brand-700)); color: #fff; }
.hero h2 { font-size: 2rem; margin-bottom: .5rem; }

/* Content */
.content { padding: 3rem 2rem; max-width: 1000px; margin: 0 auto; }
.content.narrow { max-width: 1100px; }
.content h2 { color: var(--brand-900); margin-bottom: 1rem; }
:root.dark .content h2 { color: #cfe3ff; }

/* Grid & Cards */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.25rem; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 1.25rem; box-shadow: var(--shadow); position: relative; overflow: hidden; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.card:hover { transform: translateY(-4px); box-shadow: 0 14px 32px rgba(0,0,0,0.15); border-color: transparent; }
.card h3 { margin-bottom: .4rem; }
.card p { color: var(--muted); }

/* Fancy hover gradient sweep */
.card::after { content: ""; position: absolute; inset: 0; background: radial-gradient(120px 120px at calc(var(--mx, 0) * 1px) calc(var(--my, 0) * 1px), rgba(59,130,246,0.2), transparent 60%); opacity: 0; transition: opacity .2s ease; pointer-events: none; }
.card:hover::after { opacity: 1; }

/* Chips & Tags */
.chip { display: inline-block; margin-top: .75rem; padding: .35rem .7rem; border-radius: 999px; background: rgba(59,130,246,.1); color: var(--brand-700); text-decoration: none; font-weight: 700; border: 1px solid var(--border); }
.tags { list-style: none; display: flex; gap: .5rem; margin-top: .75rem; }
.tags li { padding: .25rem .6rem; border-radius: 999px; border: 1px solid var(--border); background: rgba(0,0,0,0.03); }
:root.dark .tags li { background: rgba(255,255,255,0.03); }

/* Controls */
.controls { display: flex; gap: .75rem; margin-bottom: 1rem; flex-wrap: wrap; }

/* Contact */
.contact-list { list-style: none; padding-left: 0; }
.contact-list li { margin: .5rem 0; }

/* Footer */
footer { text-align: center; padding: 1rem; background: var(--brand-900); color: white; margin-top: 3rem; }

/* Utility */
.actions { margin-top: 1rem; }

/* Hero layout overrides to prevent overlap */
.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem; /* consistent spacing */
}
.hero h2 { margin: 0; }
.hero p { margin: 0; max-width: 750px; }
.hero .btn { margin-top: 0; }

@media (max-width: 480px) {
    .hero { padding: 4.5rem 1.25rem; }
}

/* Add spacing for footer to prevent overlap */
body { position: relative; min-height: 100vh; padding-bottom: 100px; box-sizing: border-box; }
footer {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    height: 60px;
    background-color: var(--brand-900);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

footer.footer-reveal {
    transform: translateY(105%);
    opacity: 0;
    transition: transform .25s ease, opacity .25s ease;
    will-change: transform;
}
footer.footer-reveal.show {
    transform: translateY(0);
    opacity: 1;
}

/* This padding ensures the footer does not cover the page content */
main, section.content, .content {
    margin-bottom: 100px; /* extra breathing room for bottom bar */
}

/* helper */
.muted { color: var(--muted); }