:root {
  --bg-left: #d9e1eb;
  --bg-right: #ebe5db;
  --surface: #f3f3f3;
  --surface-strong: #ffffff;
  --text: #1d2a46;
  --muted: #46536d;
  --line: #c5cbd6;
  --accent: #0666de;
  --accent-strong: #0052bd;
  --card-fill: #f6f6f6;
  --warn: #b35a00;
  --link: #0054c8;
  --code-bg: #e7edf8;
  --shadow: 0 10px 24px rgba(17, 24, 39, 0.12);
  --radius-xl: 22px;
  --radius-lg: 18px;
  --radius-md: 14px;
}

:root[data-theme="dark"] {
  --bg-left: #151e2c;
  --bg-right: #211c17;
  --surface: #1f242f;
  --surface-strong: #2a3040;
  --text: #edf2ff;
  --muted: #b6bfd1;
  --line: #3c4558;
  --accent: #5ea8ff;
  --accent-strong: #3f8fe9;
  --card-fill: #252b37;
  --warn: #f2bb78;
  --link: #8bbdff;
  --code-bg: #172132;
  --shadow: 0 14px 30px rgba(0, 0, 0, 0.38);
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: "Source Sans 3", "Helvetica Neue", Helvetica, sans-serif;
  color: var(--text);
  background: linear-gradient(110deg, var(--bg-left), var(--bg-right));
  transition: color 0.2s ease, background 0.2s ease;
}

.page-backdrop {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}

.page-backdrop::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 18%, rgba(255, 255, 255, 0.18), transparent 40%),
    radial-gradient(circle at 80% 10%, rgba(255, 255, 255, 0.14), transparent 34%);
}

.theme-toggle {
  position: fixed;
  top: 14px;
  right: 14px;
  z-index: 20;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface-strong);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.theme-toggle:hover {
  transform: translateY(-1px);
}

.theme-icon {
  font-size: 1rem;
  line-height: 1;
}

.page {
  max-width: 1060px;
  margin: 0 auto;
  padding: 28px 20px 32px;
}

.hero {
  text-align: center;
  padding: 8px 8px 20px;
}

.hero-logo {
  width: clamp(110px, 18vw, 170px);
  height: auto;
  border-radius: 30px;
  box-shadow: 0 16px 34px rgba(15, 24, 48, 0.24);
}

.eyebrow {
  margin: 18px 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  font-size: 0.84rem;
  color: var(--muted);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Sora", "Avenir Next", sans-serif;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
}

.subtitle {
  max-width: 740px;
  margin: 14px auto 0;
  font-size: clamp(1.22rem, 2vw, 1.3rem);
  line-height: 1.45;
  color: var(--muted);
}

.release-pill {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 999px;
  padding: 10px 16px;
}

.release-label {
  font-size: 1.05rem;
  color: var(--muted);
  font-weight: 600;
}

.release-label.pre-release {
  color: var(--warn);
}

.release-link {
  color: var(--link);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.05rem;
}

.release-link:hover {
  text-decoration: underline;
}

.hero-actions {
  margin-top: 22px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-block;
  padding: 12px 20px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid var(--line);
  transition: transform 0.15s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  border-color: transparent;
  box-shadow: 0 12px 22px rgba(6, 102, 222, 0.32);
}

.btn-secondary {
  color: var(--text);
  background: var(--surface);
}

.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 22px;
}

.hero + .panel {
  margin-top: 14px;
}

.panel-head {
  margin-bottom: 16px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.feature-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--card-fill);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform 0.16s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 10px 18px rgba(16, 24, 40, 0.12);
}

.feature-media {
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: var(--surface-strong);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-image {
  width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
}

.feature-card h3 {
  margin-top: 12px;
  font-size: 1.42rem;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
  font-size: 1.08rem;
}

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

.panel h2 {
  font-size: 1.7rem;
}

.steps,
.privacy {
  margin: 12px 0 0;
  padding-left: 1.14rem;
  line-height: 1.6;
  font-size: 1.08rem;
}

.note {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.5;
  font-size: 1.04rem;
}

code {
  padding: 0.08rem 0.35rem;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--code-bg);
  font-size: 0.92em;
}

.footer {
  max-width: 1060px;
  margin: 8px auto 34px;
  padding: 0 20px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

.footer a {
  color: var(--link);
  text-decoration: none;
  font-weight: 600;
}

.footer a:hover {
  text-decoration: underline;
}

@media (max-width: 980px) {
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .info-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 740px) {
  .page {
    padding-top: 64px;
  }

  .release-pill {
    border-radius: 16px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .panel,
  .feature-card {
    padding: 16px;
  }

  .feature-card h3,
  .panel h2 {
    font-size: 1.4rem;
  }

  .feature-card p,
  .steps,
  .privacy,
  .note {
    font-size: 1rem;
  }

  .theme-toggle {
    top: 10px;
    right: 10px;
  }
}