:root {
  --bg: #f7f7f5;
  --text: #1c1c1e;
  --muted: #5f6368;
  --accent: #3b5bdb;
  --accent-hover: #2f4ac0;
  --accent-soft: rgba(59, 91, 219, 0.1);
  --border: #d6d6d3;
  --surface: #ffffff;
  --error: #c92a2a;
  --success: #2b8a3e;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121214;
    --text: #ececef;
    --muted: #a0a0a8;
    --accent: #748ffc;
    --accent-hover: #91a7ff;
    --accent-soft: rgba(116, 143, 252, 0.14);
    --border: #2e2e33;
    --surface: #1c1c20;
    --error: #ff8787;
    --success: #69db7c;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #121214;
  --text: #ececef;
  --muted: #a0a0a8;
  --accent: #748ffc;
  --accent-hover: #91a7ff;
  --accent-soft: rgba(116, 143, 252, 0.14);
  --border: #2e2e33;
  --surface: #1c1c20;
  --error: #ff8787;
  --success: #69db7c;
  color-scheme: dark;
}

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

html,
body {
  margin: 0;
  height: 100%;
}

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

/* Accessibility */

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  padding: 8px 12px;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  text-decoration: none;
  z-index: 10;
}

.skip-link:focus {
  top: 12px;
}

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

/* Header */

.site-header {
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 880px;
  margin: 0 auto;
  padding: 14px 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 7px;
  background: var(--accent);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  padding: 0;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.theme-toggle:hover {
  color: var(--text);
  border-color: var(--muted);
}

.theme-toggle:focus-visible,
.brand:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.theme-toggle .icon-sun,
[data-active-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

[data-active-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

/* Main */

.container {
  flex: 1;
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding: 72px 16px 48px;
}

.hero {
  max-width: 640px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 0 var(--success);
  animation: pulse 2s ease-out infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--success) 50%, transparent); }
  100% { box-shadow: 0 0 0 8px transparent; }
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 6vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.accent {
  color: var(--accent);
}

.lead {
  margin: 0 0 32px;
  font-size: 1.1rem;
  color: var(--muted);
}

.notify {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.notify input {
  flex: 1 1 220px;
  min-width: 0;
  padding: 12px 14px;
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.notify input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: transparent;
}

.notify button {
  padding: 12px 20px;
  font: inherit;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s ease;
}

.notify button:hover {
  background: var(--accent-hover);
}

.notify button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.form-message {
  min-height: 1.6em;
  margin: 12px 0 0;
  font-size: 0.95rem;
}

.form-message.error {
  color: var(--error);
}

.form-message.success {
  color: var(--success);
}

/* Preview cards */

.preview {
  margin-top: 72px;
}

.section-label {
  margin: 0 0 16px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.card {
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card-icon {
  display: block;
  box-sizing: content-box;
  padding: 8px;
  margin-bottom: 12px;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 8px;
}

.card h3 {
  margin: 0 0 4px;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

/* Footer */

.footer {
  padding: 28px 16px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}

.footer p {
  margin: 0;
}

.footer-name {
  margin-bottom: 4px !important;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

/* Entrance animation */

.js .reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

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

  .status-dot {
    animation: none;
  }

  .card:hover {
    transform: none;
  }
}