:root {
  color-scheme: light;
  --color-bg: #fafaf8;
  --color-surface: #fff;
  --color-surface-raised: #f7f4ec;
  --color-surface-muted: #f1eee5;
  --color-border: #e5e0d3;
  --color-border-strong: #d5cfc0;
  --color-text: #1b1a17;
  --color-text-secondary: #34312d;
  --color-text-muted: #57524b;
  --color-text-subtle: #777168;
  --color-accent: #c39a49;
  --color-accent-hover: #ae8335;
  --color-accent-soft: #fbf4e4;
  --color-on-accent: #171611;
  --color-success: #426b49;
  --color-danger: #9a4d3a;
  --color-shadow: rgba(23, 22, 17, 0.16);
  --font-sans: "Archivo", "Helvetica Neue", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
  --content-width: 1080px;
  --content-wide: 1240px;
  --header-height: 62px;
  --radius-control: 5px;
  --radius-panel: 8px;
  --transition-fast: 180ms ease;

  /* Compatibility aliases while product surfaces migrate to semantic tokens. */
  --bg: var(--color-bg);
  --surface: var(--color-surface);
  --surface-2: var(--color-surface-raised);
  --muted: var(--color-surface-muted);
  --line: var(--color-border);
  --line-strong: var(--color-border-strong);
  --text: var(--color-text);
  --text-2: var(--color-text-secondary);
  --text-3: var(--color-text-muted);
  --text-4: var(--color-text-subtle);
  --gold: var(--color-accent);
  --gold-hover: var(--color-accent-hover);
  --gold-soft: var(--color-accent-soft);
  --gold-on: var(--color-on-accent);
  --green: var(--color-success);
  --red: var(--color-danger);
  --shadow: var(--color-shadow);
  --logo-filter: invert(1) brightness(0.35);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --color-bg: #151514;
  --color-surface: #1d1d1b;
  --color-surface-raised: #232321;
  --color-surface-muted: #282724;
  --color-border: #34332f;
  --color-border-strong: #46443e;
  --color-text: #f1eee8;
  --color-text-secondary: #ddd9d1;
  --color-text-muted: #bbb5ac;
  --color-text-subtle: #918b82;
  --color-accent: #c49842;
  --color-accent-hover: #d3a750;
  --color-accent-soft: #332a18;
  --color-on-accent: #171611;
  --color-success: #8abd92;
  --color-danger: #dc927e;
  --color-shadow: rgba(0, 0, 0, 0.45);
  --logo-filter: brightness(1.35) contrast(1.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text-muted);
  font: 400 15px/1.62 var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

[hidden] {
  display: none !important;
}

.shell {
  width: min(var(--content-width), calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  padding: 11px max(20px, calc((100vw - var(--content-width)) / 2));
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text-secondary);
  font-size: 13.5px;
  font-weight: 600;
}

.brand img {
  display: block;
  width: auto;
  height: 18px;
}

.brand i {
  width: 1px;
  height: 16px;
  background: var(--color-border-strong);
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.site-header nav a {
  color: var(--color-text-subtle);
  font-size: 12.5px;
  font-weight: 600;
}

.site-header nav a:hover {
  color: var(--color-accent);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px max(20px, calc((100vw - var(--content-width)) / 2));
  border-top: 1px solid var(--color-border);
  color: var(--color-text-subtle);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-footer a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.site-footer a:hover,
.site-footer .footer-link {
  color: var(--color-accent);
}

.section-label {
  margin: 0 0 14px;
  color: var(--color-accent);
  font: 600 10px/1.2 var(--font-mono);
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 21px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-control);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-size: 14px;
  font-weight: 600;
  transition: border-color var(--transition-fast), background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.button:hover {
  border-color: var(--color-accent);
  color: var(--color-text);
  transform: translateY(-1px);
}

.button.primary {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-on-accent);
}

.button.primary:hover {
  border-color: var(--color-accent-hover);
  background: var(--color-accent-hover);
}

.button:disabled {
  opacity: 0.42;
  cursor: not-allowed;
  transform: none;
}

input,
textarea,
select {
  width: 100%;
  padding: 10px 11px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-control);
  outline: none;
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 14px;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 14%, transparent);
}

textarea {
  resize: vertical;
}

.form-status,
.error-message {
  min-height: 20px;
  margin: 14px 0 0;
  color: var(--color-danger);
  font-size: 13px;
  font-weight: 600;
}

.error-message {
  text-align: center;
}

.rise {
  animation: rise 480ms ease both;
}

.delay-one {
  animation-delay: 100ms;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(9px); }
  to { opacity: 1; transform: none; }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 600px) {
  .shell {
    width: min(calc(100% - 28px), var(--content-width));
  }

  .site-header {
    padding-inline: 14px;
  }

  .brand img {
    height: 15px;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (max-width: 460px) {
  .brand span,
  .brand i {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}