:root {
    --radius: 14px;
}

/* Dark theme (default) */
:root,
[data-theme="dark"] {
    --bg: #0f1115;
    --panel: #171a21;
    --text: #e7e9ee;
    --muted: #9aa3b2;
    --accent: #4f8cff;
    --border: #242936;
    --header-bg: rgba(15, 17, 21, 0.85);
}

/* Light theme */
[data-theme="light"] {
    --bg: #f7f8fa;
    --panel: #ffffff;
    --text: #1b1f27;
    --muted: #5b6472;
    --accent: #2f6fed;
    --border: #e3e6ec;
    --header-bg: rgba(247, 248, 250, 0.85);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main { flex: 1; }

.container { max-width: 1080px; margin: 0 auto; padding: 0 1.25rem; }

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

.site-header {
    border-bottom: 1px solid var(--border);
    background: var(--header-bg);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 10;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.brand { font-weight: 800; letter-spacing: 2px; color: var(--text); }
.nav a { color: var(--muted); margin-left: 1.5rem; }
.nav a.active, .nav a:hover { color: var(--text); text-decoration: none; }

.nav-auth { margin-left: 1.5rem; padding-left: 1.5rem; border-left: 1px solid var(--border); }
.nav-auth a { margin-left: 0; }
.nav-auth a + a { margin-left: 1rem; }

.theme-toggle {
    margin-left: 1rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.3rem 0.5rem;
    cursor: pointer;
    line-height: 1;
    font-size: 1rem;
}
.theme-toggle:hover { border-color: var(--accent); }
[data-theme="dark"] .theme-icon-dark { display: none; }
[data-theme="light"] .theme-icon-light { display: none; }

.lang-switch { margin-left: 1.5rem; padding-left: 1.5rem; border-left: 1px solid var(--border); }
.lang-switch a { margin-left: 0.6rem; font-size: 0.85rem; font-weight: 600; }
.lang-switch a:first-child { margin-left: 0; }
.lang-switch a.active { color: var(--accent); }

.hero {
    padding: 5rem 0 4rem;
    text-align: center;
    background: radial-gradient(1200px 400px at 50% -10%, rgba(79,140,255,0.18), transparent);
}
.hero h1 { font-size: 3rem; margin: 0 0 0.5rem; }
.lead { font-size: 1.25rem; color: var(--muted); margin: 0 0 1.5rem; }

.section { padding: 3rem 0; }
.section h2 { margin-top: 0; }

.btn {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    padding: 0.7rem 1.4rem;
    border-radius: var(--radius);
    border: none;
    font-size: 1rem;
    cursor: pointer;
}
.btn:hover { text-decoration: none; opacity: 0.92; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.25rem; }
.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
}
.card { overflow: hidden; padding: 0; }
.card > h3, .card > p, .card > .link { padding-left: 1.5rem; padding-right: 1.5rem; }
.card > .link { display: inline-block; padding-bottom: 1.5rem; }
.card-media {
    display: block;
    aspect-ratio: 4 / 3;
    background: var(--bg);
    overflow: hidden;
}
.card-media img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.3s ease; }
.card-media:hover img { transform: scale(1.04); }
.card h3 { margin-top: 1.25rem; }

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0 2rem;
}
.gallery-item { margin: 0; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--panel); }
.gallery-item img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; display: block; }
.muted { color: var(--muted); }
.link { font-weight: 600; }

.prose { max-width: 680px; }

.contacts-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 2.5rem; }
.contact-list { list-style: none; padding: 0; }
.contact-list li { padding: 0.35rem 0; }

form { display: block; }
form label { display: block; margin: 1rem 0 0.35rem; color: var(--muted); }
form input, form textarea {
    width: 100%;
    padding: 0.7rem 0.9rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-size: 1rem;
}
form button { margin-top: 1.25rem; }
.form-error, ul li { color: #ff6b6b; }
form ul { padding-left: 1rem; }

.flash {
    padding: 0.9rem 1.1rem;
    border-radius: 10px;
    margin: 1.5rem 0;
}
.flash-success { background: rgba(46, 160, 67, 0.15); border: 1px solid rgba(46,160,67,0.5); color: #7ee787; }

.site-footer {
    border-top: 1px solid var(--border);
    color: var(--muted);
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.9rem;
}

@media (max-width: 720px) {
    .contacts-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 2.2rem; }
}