:root {
  --bg: #0b1220;
  --surface: rgba(255, 255, 255, 0.06);
  --surface-2: rgba(255, 255, 255, 0.09);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.68);
  --border: rgba(255, 255, 255, 0.14);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);

  --accent: #79f2c0;
  --accent-2: #70a5ff;
  --danger: #ff6b6b;

  --radius: 18px;
  --radius-sm: 12px;
  --container: 1100px;

  --header-h: 76px;
  --font: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

html:not(.dark) {
  --bg: #f6f7fb;
  --surface: rgba(20, 26, 40, 0.06);
  --surface-2: rgba(20, 26, 40, 0.09);
  --text: rgba(15, 18, 25, 0.92);
  --muted: rgba(15, 18, 25, 0.68);
  --border: rgba(20, 26, 40, 0.14);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.12);

  --accent: #0ea371;
  --accent-2: #2b6cff;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: radial-gradient(1000px 500px at 15% -10%, rgba(121, 242, 192, 0.15), transparent 55%),
    radial-gradient(900px 600px at 90% 10%, rgba(112, 165, 255, 0.14), transparent 55%),
    var(--bg);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  transform: translateY(-150%);
  transition: transform 180ms ease;
  z-index: 2000;
}
.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid color-mix(in srgb, var(--accent-2), white 20%);
  outline-offset: 2px;
}

.container {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: color-mix(in srgb, var(--bg), transparent 22%);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 18px;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent-2), transparent 75%);
}
.brand-text {
  font-size: 14px;
  opacity: 0.95;
}

.nav {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 12px;
  cursor: pointer;
}
.nav-toggle-bars {
  display: block;
  width: 18px;
  height: 12px;
  background: linear-gradient(var(--text) 0 0) top/100% 2px,
    linear-gradient(var(--text) 0 0) center/100% 2px,
    linear-gradient(var(--text) 0 0) bottom/100% 2px;
  background-repeat: no-repeat;
  opacity: 0.8;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.nav-links a {
  text-decoration: none;
  color: var(--muted);
  font-size: 13px;
  padding: 9px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: background 140ms ease, border-color 140ms ease, color 140ms ease;
}
.nav-links a:hover {
  color: var(--text);
  background: var(--surface);
  border-color: var(--border);
}
.nav-links a[aria-current="true"] {
  color: var(--text);
  background: color-mix(in srgb, var(--surface-2), transparent 10%);
  border-color: color-mix(in srgb, var(--accent-2), var(--border) 65%);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  box-shadow: 0 0 0 rgba(0, 0, 0, 0);
  transition: transform 120ms ease, box-shadow 140ms ease, background 140ms ease;
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}
.btn:active {
  transform: translateY(0);
}
.btn:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent-2), white 20%);
  outline-offset: 3px;
}

.btn-primary {
  border-color: color-mix(in srgb, var(--accent-2), var(--border) 50%);
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--accent), transparent 20%),
    color-mix(in srgb, var(--accent-2), transparent 12%)
  );
}
.btn-secondary {
  border-color: color-mix(in srgb, var(--accent), var(--border) 62%);
  background: color-mix(in srgb, var(--surface-2), transparent 0%);
}
.btn-ghost {
  background: transparent;
}

.theme-icon {
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 30%, var(--accent) 0 30%, transparent 31%),
    radial-gradient(circle at 70% 70%, var(--accent-2) 0 30%, transparent 31%),
    color-mix(in srgb, var(--text), transparent 75%);
  opacity: 0.95;
}

.hero {
  padding: 44px 0 10px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 26px;
  align-items: start;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 8px 10px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface), transparent 20%);
  width: fit-content;
}

.hero-title {
  font-size: clamp(36px, 4vw, 54px);
  line-height: 1.05;
  margin: 14px 0 10px;
  letter-spacing: -0.04em;
}
.hero-subtitle {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.hero-badges {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}
.badge {
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface), transparent 10%);
}
.badge-label {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
}
.badge-value {
  font-weight: 700;
  font-size: 13px;
}

.hero-media {
  display: grid;
  gap: 16px;
}

.avatar-wrap {
  position: relative;
  border-radius: 28px;
  padding: 14px;
  background: color-mix(in srgb, var(--surface), transparent 10%);
  border: 1px solid var(--border);
  overflow: hidden;
}
.avatar {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 20px;
  display: block;
}
.avatar-glow {
  position: absolute;
  inset: -40%;
  background: radial-gradient(circle at 40% 30%, rgba(121, 242, 192, 0.25), transparent 55%),
    radial-gradient(circle at 60% 60%, rgba(112, 165, 255, 0.22), transparent 50%);
  filter: blur(22px);
  pointer-events: none;
}

.video-card {
  border-radius: 28px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface), transparent 10%);
  overflow: hidden;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.12);
}
.video-card-head {
  padding: 14px 16px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--border);
}
.video-card-title {
  font-weight: 800;
  letter-spacing: -0.02em;
}
.video-card-subtitle {
  color: var(--muted);
  font-size: 12px;
}

.video-shell {
  position: relative;
}
.video-shell video {
  width: 100%;
  display: block;
  background: rgba(0, 0, 0, 0.5);
  aspect-ratio: 16/9;
}
.video-fallback {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 18px;
  text-align: center;
  color: var(--muted);
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--surface-2), transparent 10%),
    color-mix(in srgb, var(--surface), transparent 10%)
  );
}
.video-fallback code {
  color: var(--text);
  background: color-mix(in srgb, var(--surface-2), transparent 10%);
  padding: 2px 6px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.playlist {
  display: grid;
  gap: 10px;
  padding: 14px 16px 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.playlist button {
  width: 100%;
  height: 38px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-weight: 650;
  font-size: 12px;
  cursor: pointer;
  transition: background 140ms ease, transform 120ms ease, border-color 140ms ease;
}
.playlist button:hover {
  background: var(--surface);
  transform: translateY(-1px);
}
.playlist button[aria-pressed="true"] {
  background: color-mix(in srgb, var(--accent-2), transparent 86%);
  border-color: color-mix(in srgb, var(--accent-2), var(--border) 50%);
}

.content {
  padding: 18px 0 60px;
}

.section {
  padding: 18px;
  border-radius: 28px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface), transparent 10%);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.08);
  margin: 18px 0;
}
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.section-title {
  margin: 0;
  font-size: 18px;
  letter-spacing: -0.02em;
}
.section-note {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 14px;
  margin-top: 14px;
}
.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface), transparent 0%);
  padding: 14px;
}
.card-title {
  font-weight: 800;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}
.card-meta {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
}
.card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.list {
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
}
.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}
.pill {
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface-2), transparent 10%);
  color: var(--text);
  opacity: 0.9;
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}
.link-row a {
  color: var(--text);
  text-decoration: none;
  border: 1px solid var(--border);
  background: transparent;
  padding: 8px 10px;
  border-radius: 999px;
  font-size: 12px;
}
.link-row a:hover {
  background: var(--surface);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 14px;
  margin-top: 14px;
}
.form {
  display: grid;
  gap: 10px;
}
.field {
  display: grid;
  gap: 6px;
}
.field label {
  font-size: 12px;
  color: var(--muted);
}
.field input,
.field textarea {
  width: 100%;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface), transparent 0%);
  color: var(--text);
  font-family: var(--font);
  font-size: 13px;
  outline: none;
}
.field textarea {
  min-height: 120px;
  resize: vertical;
}
.field input:focus,
.field textarea:focus {
  border-color: color-mix(in srgb, var(--accent-2), var(--border) 40%);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent-2), transparent 84%);
}
.form-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.form-success {
  margin-top: 10px;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid color-mix(in srgb, var(--accent), var(--border) 45%);
  background: color-mix(in srgb, var(--accent), transparent 88%);
  color: var(--text);
  font-size: 13px;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 26px 0;
  background: color-mix(in srgb, var(--bg), transparent 10%);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.footer-left {
  color: var(--muted);
  font-size: 13px;
}
.footer-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.footer-links a {
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--border);
  padding: 8px 10px;
  border-radius: 999px;
}
.footer-links a:hover {
  color: var(--text);
  background: var(--surface);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  background: color-mix(in srgb, var(--surface-2), transparent 0%);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 14px;
  box-shadow: var(--shadow);
  z-index: 3000;
  font-size: 13px;
}

.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 520ms ease, transform 520ms ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    transition: none;
    transform: none;
    opacity: 1;
  }
}

@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }
  .hero-badges {
    grid-template-columns: 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-flex;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: calc(var(--header-h) - 8px);
    right: 20px;
    left: 20px;
    padding: 12px;
    border-radius: 18px;
    background: color-mix(in srgb, var(--bg), transparent 12%);
    border: 1px solid var(--border);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    box-shadow: var(--shadow);
  }
  .nav-links.is-open {
    display: flex;
  }
  .nav-links a {
    flex: 1 1 auto;
    text-align: center;
  }
  .header-actions .theme-label {
    display: none;
  }
}