:root {
    color-scheme: light;
    --bg: #f5f7fb;
    --surface: #ffffff;
    --surface-2: #f8fafc;
    --text: #101828;
    --muted: #667085;
    --line: #e4e7ec;
    --primary: #2563eb;
    --primary-2: #1d4ed8;
    --accent: #7c3aed;
    --success: #067647;
    --danger: #b42318;
    --shadow: 0 20px 60px rgba(16, 24, 40, .09);
    --radius: 24px;
}

body.dark {
    color-scheme: dark;
    --bg: #080d18;
    --surface: #101827;
    --surface-2: #151f31;
    --text: #f2f4f7;
    --muted: #98a2b3;
    --line: #273449;
    --primary: #60a5fa;
    --primary-2: #93c5fd;
    --accent: #a78bfa;
    --success: #6ce9a6;
    --danger: #fda29b;
    --shadow: 0 25px 70px rgba(0,0,0,.3);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
    margin: 0;
    background:
        radial-gradient(circle at 10% 0%, rgba(37, 99, 235, .08), transparent 28rem),
        radial-gradient(circle at 90% 20%, rgba(124, 58, 237, .07), transparent 26rem),
        var(--bg);
    color: var(--text);
    font-family: Tahoma, "Segoe UI", system-ui, sans-serif;
    line-height: 1.9;
    transition: background .25s ease, color .25s ease;
}

a { color: inherit; }

.skip-link {
    position: fixed; top: -100px; right: 16px; z-index: 9999;
    padding: 10px 16px; border-radius: 12px;
    background: var(--text); color: var(--surface);
}
.skip-link:focus { top: 16px; }

.nav-wrap {
    position: sticky; top: 0; z-index: 100;
    border-bottom: 1px solid var(--line);
    background: color-mix(in srgb, var(--surface) 88%, transparent);
    backdrop-filter: blur(16px);
}
.nav {
    max-width: 1180px; margin: auto; padding: 12px 20px;
    display: flex; align-items: center; justify-content: space-between; gap: 18px;
}
.brand { text-decoration: none; font-weight: 900; letter-spacing: -.3px; }
.brand span { color: var(--primary); }
.nav-links { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.nav-links a {
    text-decoration: none; color: var(--muted); padding: 7px 11px;
    border-radius: 10px; font-size: .9rem;
}
.nav-links a:hover, .nav-links a:focus-visible, .nav-links a.active {
    color: var(--text); background: var(--surface-2);
}
.nav-links a.lang-switch {
    border: 1px solid var(--line); font-weight: 700;
}
.theme-btn {
    width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 12px;
    background: var(--surface); color: var(--text); cursor: pointer; font-size: 1.1rem;
}

.container { width: min(1180px, calc(100% - 32px)); margin: auto; }

.breadcrumb { padding: 18px 0 0; }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; padding: 0; margin: 0; color: var(--muted); font-size: .88rem; }
.breadcrumb a { text-decoration: none; color: var(--muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb li { display: flex; align-items: center; gap: 6px; }

.hero {
    min-height: 460px; display: grid; grid-template-columns: 1.25fr .75fr;
    gap: 50px; align-items: center; padding: 56px 0 40px;
}
.eyebrow {
    display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px;
    border: 1px solid var(--line); border-radius: 999px; background: var(--surface);
    color: var(--muted); font-size: .85rem;
}
h1 { margin: 18px 0 14px; font-size: clamp(2rem, 5vw, 3.6rem); line-height: 1.2; letter-spacing: -1px; }
h1 span { color: var(--primary); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin: 0 0 8px; }
.lead { max-width: 760px; color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.2rem); }

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 11px 18px; border-radius: 13px; text-decoration: none;
    border: 1px solid var(--line); background: var(--surface); font-weight: 700;
}
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }

section { padding: 46px 0; }
.section-head { max-width: 720px; margin-bottom: 26px; }
.section-head p { color: var(--muted); margin: 6px 0 0; }

.card {
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
    padding: 22px; box-shadow: var(--shadow);
}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.project { text-decoration: none; display: block; }
.project-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.project-name { font-weight: 800; }
.tag { font-size: .78rem; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 2px 10px; }

.social-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.social {
    display: flex; align-items: center; gap: 10px; text-decoration: none;
    background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 14px 16px;
}
.social-icon { font-weight: 800; color: var(--primary); }

.timeline { display: flex; flex-direction: column; gap: 16px; }
.timeline .card { display: grid; grid-template-columns: 200px 1fr; gap: 18px; }
.timeline .period { color: var(--primary); font-weight: 800; }
.timeline .place { color: var(--muted); font-size: .92rem; margin: 2px 0 8px; }

.contact { display: grid; grid-template-columns: .8fr 1.2fr; gap: 20px; }
.email { color: var(--primary); font-weight: 800; text-decoration: none; }
.form-group { margin-bottom: 14px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 700; font-size: .9rem; }
.form-group input, .form-group textarea {
    width: 100%; padding: 11px 13px; border-radius: 12px; border: 1px solid var(--line);
    background: var(--surface-2); color: var(--text); font-family: inherit; font-size: .95rem;
}
.form-group textarea { min-height: 130px; resize: vertical; }
.submit {
    background: var(--primary); color: #fff; border: none; border-radius: 13px;
    padding: 12px 22px; font-weight: 800; cursor: pointer; font-size: .95rem;
}
.hp { position: absolute; left: -9999px; }
.message { padding: 12px 14px; border-radius: 12px; margin-bottom: 14px; font-size: .92rem; }
.message.success { background: rgba(6,118,71,.1); color: var(--success); }
.message.error { background: rgba(180,35,24,.1); color: var(--danger); }

.placeholder-note {
    border: 1px dashed var(--line); border-radius: 16px; padding: 16px 18px;
    color: var(--muted); font-size: .9rem; background: var(--surface-2);
}

footer { border-top: 1px solid var(--line); padding: 26px 0 40px; color: var(--muted); font-size: .9rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 10px; }
.footer-links a { text-decoration: none; color: var(--muted); }
.footer-links a:hover { color: var(--text); }
.footer-lang { margin-top: 10px; }
.footer-lang a { color: var(--primary); text-decoration: none; }

@media (max-width: 880px) {
    .hero { grid-template-columns: 1fr; min-height: auto; }
    .grid-4, .grid-3, .grid-2, .project-grid, .social-grid { grid-template-columns: 1fr 1fr; }
    .contact, .timeline .card { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    .grid-4, .grid-3, .grid-2, .project-grid, .social-grid { grid-template-columns: 1fr; }
}