:root {
  --md-sys-color-background: #121417;
  --md-sys-color-surface: #161a1e;
  --md-sys-color-surface-variant: #1a2026;
  --md-sys-color-on-surface: #e6edf3;
  --md-sys-color-on-surface-variant: #b6c2cd;
  --md-sys-color-outline: #2b3440;
  --md-sys-color-primary: #00b3ad;
  --md-sys-color-on-primary: #00201f;
  --md-sys-color-link: #7aa8ff;
  --container-max: 1120px;
  --radius: 16px;
  --shadow-1: 0 1px 2px rgba(0,0,0,.35), 0 1px 1px rgba(0,0,0,.25);
  --shadow-2: 0 18px 48px rgba(0,0,0,.45);
  --h1: 28px;
  --h2: 22px;
  --h3: 18px;
  --lead: 16px;
  --body: 15px;
  --space-2: 12px;
  --space-3: 16px;
  --space-4: 20px;
  --space-5: 28px;
  --space-6: 40px;
  --icon-size: 22px;
  --dialog-field-container: #20262d;
}

@media (max-width: 768px) {
  :root {
    --h1: 24px;
    --h2: 20px;
    --h3: 16px;
    --lead: 15px;
    --body: 14px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 28px;
  }
}

:root[data-theme="light"] {
  --md-sys-color-background: #ffffff;
  --md-sys-color-surface: #ffffff;
  --md-sys-color-surface-variant: #f5f7fb;
  --md-sys-color-on-surface: #111827;
  --md-sys-color-on-surface-variant: #374151;
  --md-sys-color-outline: #d1d9e6;
  --md-sys-color-primary: #0b6b6b;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-link: #0b57d0;
  --dialog-field-container: #eef1f7;
}

/* Base */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--md-sys-color-background);
  color: var(--md-sys-color-on-surface);
  font: 400 var(--body)/1.5 ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial;
  min-height: 100vh;
  padding-bottom: 80px; /* space for cookie banner */
}

a { color: var(--md-sys-color-link); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 20px; }

@media (max-width: 768px) {
  .container { padding: 0 16px; }
  body { padding-bottom: 120px; }
}

/* Icons */
md-icon {
  font-family: "Material Symbols Outlined";
  font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  font-size: var(--icon-size);
  line-height: 1;
  vertical-align: -2px;
}

/* App bar */
.site-appbar {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in oklab, var(--md-sys-color-surface) 95%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--md-sys-color-outline);
}

.appbar-inner { display: flex; align-items: center; height: 64px; gap: var(--space-3); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--md-sys-color-on-surface); font-weight: 700; font-size: 16px; }
.brand .brand-icon { color: var(--md-sys-color-primary); }
.nav-links { margin-left: auto; display: flex; gap: var(--space-3); }
.nav-links a { color: var(--md-sys-color-on-surface); font-weight: 600; font-size: 14px; }
.nav-links a[aria-current="page"] { text-decoration: underline; text-underline-offset: 4px; }

@media (max-width: 768px) {
  .appbar-inner { height: 56px; gap: var(--space-2); }
  .brand { font-size: 14px; }
  .nav-links { gap: var(--space-2); }
  .nav-links a { font-size: 13px; }
}

.actions { display: flex; align-items: center; gap: 8px; }
.icon-button, .text-button { background: none; border: 0; color: var(--md-sys-color-on-surface); display: inline-flex; align-items: center; gap: 8px; cursor: pointer; padding: 6px 10px; }

/* Language menu */
.lang-switch { position: relative; }
#langMenu {
  position: absolute; right: 0; top: 40px; background: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline); border-radius: 12px; box-shadow: var(--shadow-2);
  display: none; min-width: 200px;
}

#langMenu[open] { display: block; }
#langMenu button { display: block; width: 100%; padding: 10px 14px; text-align: left; background: none; border: 0; color: var(--md-sys-color-on-surface); }
#langMenu button:hover { background: var(--md-sys-color-surface-variant); }

/* Hero & sections */
.hero {
  background: linear-gradient(180deg, var(--md-sys-color-surface) 0%, var(--md-sys-color-surface-variant) 100%);
  padding: var(--space-6) 0 var(--space-5);
}

.hero h1 { font-size: var(--h1); line-height: 1.2; letter-spacing: -.01em; margin: 0 0 var(--space-2); }
.h1-icon { margin-right: 6px; }
.lead { font-size: var(--lead); color: var(--md-sys-color-on-surface-variant); max-width: 800px; line-height: 1.4; }
.cta { display: flex; gap: 12px; margin-top: var(--space-2); flex-wrap: wrap; }

@media (max-width: 768px) {
  .hero { padding: var(--space-5) 0 var(--space-4); }
  .cta { gap: 8px; }
  .cta md-filled-button, .cta md-outlined-button { font-size: 14px; }
}

/* Sections */
.section { padding: var(--space-5) 0; }
.surface-alt { background: var(--md-sys-color-surface-variant); }
h2 { font-size: var(--h2); line-height: 1.25; margin: 0 0 var(--space-3); }
h3 { font-size: var(--h3); line-height: 1.3; margin: 0 0 8px; }

/* Responsive media blocks */
.media {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-1);
  margin: 0 0 12px;
}

.media img {
  width: 100%; height: auto; display: block;
  object-fit: contain; object-position: center;
  aspect-ratio: 16 / 9; background: var(--md-sys-color-surface-variant);
}

.hero .media img { aspect-ratio: 21 / 9; }
.section-hero-media {
  max-width: 1200px; margin: 0 auto 16px auto;
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-1);
}

.section-hero-media img {
  width: 100%; height: auto; display: block; object-fit: contain; object-position: center;
  aspect-ratio: 20 / 9; background: var(--md-sys-color-surface-variant);
}

.open-source-media img { aspect-ratio: 4 / 3; object-fit: contain; }
.card-tall .media img { aspect-ratio: 3 / 4; }
.card-square .media img { aspect-ratio: 1 / 1; }

@media (min-width: 960px) {
  .media img { object-fit: cover; }
  .open-source-media img { object-fit: contain; }
}

/* Grids & cards */
.grid-2 { display: grid; grid-template-columns: 1fr; gap: var(--space-3); }
@media (min-width: 960px) { .grid-2 { grid-template-columns: 1fr 1fr; } }
.cards { display: grid; grid-template-columns: 1fr; gap: var(--space-3); }
@media (min-width: 720px) { .cards { grid-template-columns: repeat(3, 1fr); } }

.card {
  background: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  padding: var(--space-3);
}

.card h3 { display: flex; align-items: center; gap: 8px; margin: 0 0 6px; }
.card p { margin: 0 0 10px; color: var(--md-sys-color-on-surface-variant); }

@media (max-width: 768px) {
  .card { padding: var(--space-2); }
  .cards { grid-template-columns: 1fr; }
}

/* Lists & FAQ */
.ul { margin: 0; padding-left: 1.1rem; color: var(--md-sys-color-on-surface-variant); }
.ul li { margin: 6px 0; line-height: 1.4; }
.faq { border-top: 1px solid var(--md-sys-color-outline); }
.faq-item { padding: 14px 0; border-bottom: 1px solid var(--md-sys-color-outline); }
.faq-item h3 { margin: 0 0 6px; }
.faq-item p { line-height: 1.4; }

/* Forms & dialog */
.form { display: grid; gap: 14px; max-width: 720px; }
.status { color: var(--md-sys-color-on-surface-variant); }

md-dialog {
  --md-dialog-container-color: var(--md-sys-color-surface);
  --md-dialog-container-shape: 18px;
  --md-dialog-headline-color: var(--md-sys-color-on-surface);
  --md-dialog-supporting-text-color: var(--md-sys-color-on-surface-variant);
}

md-dialog::part(content) {
  min-width: min(680px, 92vw);
  max-width: 92vw;
  max-height: 75vh;
  padding-top: 8px;
}

md-dialog::part(actions) { border-top: 1px solid var(--md-sys-color-outline); }
md-filled-text-field { --md-sys-color-surface-container-highest: var(--dialog-field-container); width: 100%; }

/* Footer */
.site-footer { border-top: 1px solid var(--md-sys-color-outline); background: var(--md-sys-color-surface); margin-top: 40px; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-3); padding: 24px 0; }
.footer-links a { color: var(--md-sys-color-on-surface); margin-left: 16px; }
.copy { padding: 10px 0 24px; }
.muted { color: var(--md-sys-color-on-surface-variant); }
.center { text-align: center; }

@media (max-width: 768px) {
  .footer-inner { flex-direction: column; gap: var(--space-2); }
  .footer-links a { margin-left: 0; margin-right: 16px; }
}

/* Cookie banner (Material bottom sheet) */
.cookie-banner {
  position: fixed; left: 0; right: 0; bottom: 0;
  display: none; align-items: center; justify-content: space-between; gap: 16px;
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  border-top: 2px solid var(--md-sys-color-primary);
  box-shadow: var(--shadow-2);
  padding: 16px 20px; z-index: 2147483647;
  backdrop-filter: saturate(140%) blur(8px);
}

.cookie-banner p {
  margin: 0; font-size: 14px; line-height: 1.4; flex: 1; color: var(--md-sys-color-on-surface);
}

.cookie-actions { display: flex; gap: 12px; flex-shrink: 0; }
.cookie-btn {
  background: none; border: 2px solid var(--md-sys-color-primary);
  color: var(--md-sys-color-primary);
  padding: 8px 16px; border-radius: var(--radius);
  font-size: 14px; font-weight: 600; cursor: pointer; transition: all .2s ease;
}

.cookie-btn:hover { background: var(--md-sys-color-primary); color: var(--md-sys-color-on-primary); }
.cookie-btn.primary { background: var(--md-sys-color-primary); color: var(--md-sys-color-on-primary); }
.cookie-btn.primary:hover { background: color-mix(in oklab, var(--md-sys-color-primary) 90%, #000); }

.cookie-manage {
  position: fixed; right: 20px; bottom: 100px; display: none;
  width: 48px; height: 48px; border-radius: 50%; border: 0;
  background: var(--md-sys-color-primary); color: var(--md-sys-color-on-primary);
  cursor: pointer; box-shadow: var(--shadow-1); z-index: 2147483647;
}

.cookie-manage:hover { background: color-mix(in oklab, var(--md-sys-color-primary) 90%, #000); }

@media (max-width: 768px) {
  .cookie-banner { flex-direction: column; align-items: stretch; gap: 12px; padding: 16px; }
  .cookie-actions { gap: 8px; }
  .cookie-btn { flex: 1; padding: 12px 16px; }
  .cookie-manage { right: 16px; bottom: 80px; width: 44px; height: 44px; }
}

/* Focus */
:where(a, button):focus-visible {
  outline: 3px solid color-mix(in oklab, var(--md-sys-color-primary) 60%, #0000);
  outline-offset: 2px; border-radius: 8px;
}