/* dcr.aero base styles. All values come from tokens.css custom
 * properties; never hardcode colors or spacing here. */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  /* Keep anchored/focused content clear of the sticky header (WCAG 2.4.11) */
  scroll-padding-top: 5rem;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--type-size-base);
  font-weight: var(--font-weight-regular);
  line-height: var(--type-leading-base);
  color: var(--color-text);
  background: var(--color-bg);
}

/* Typography */
h1,
h2,
h3,
h4 {
  font-weight: var(--font-weight-medium);
  line-height: var(--type-leading-tight);
  margin: 0 0 var(--space-4);
  color: var(--color-text);
}

h1 {
  font-size: var(--type-size-2xl);
}

h2 {
  font-size: var(--type-size-xl);
  color: var(--color-heading);
}

h3 {
  font-size: var(--type-size-lg);
}

h4 {
  font-size: var(--type-size-md);
}

p {
  margin: 0 0 var(--space-4);
}

a {
  color: var(--color-link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--color-link-hover);
}

code,
pre,
.mono {
  font-family: var(--font-mono);
  font-size: 0.9375em;
}

small,
.text-small {
  font-size: var(--type-size-sm);
}

.text-muted {
  color: var(--color-text-muted);
}

/* Markdown tables in content pages (e.g. cookies) */
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 var(--space-4);
  font-size: var(--type-size-sm);
}

.prose th,
.prose td {
  text-align: left;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  vertical-align: top;
}

.prose thead th {
  background: var(--color-surface);
  font-weight: var(--font-weight-medium);
}

ul,
ol {
  margin: 0 0 var(--space-4);
  padding-left: var(--space-5);
}

address {
  font-style: normal;
  margin: 0 0 var(--space-4); /* match paragraph spacing between sections */
}

/* 404 page */
.error-page {
  text-align: center;
}

.error-code {
  font-family: var(--font-mono);
  font-weight: var(--font-weight-medium);
  font-size: var(--type-size-3xl);
  line-height: 1;
  color: var(--color-link);
  margin-bottom: var(--space-2);
}

.error-page .prose {
  margin-inline: auto;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
  margin-top: var(--space-6);
}

/* Back-to-home link at the top of legal/policy pages */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  min-height: 1.75rem; /* >= 24px tap target */
  margin-bottom: var(--space-5);
  font-size: var(--type-size-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}

.back-link:hover {
  color: var(--color-link);
}

/* Click-to-copy button injected after mailto links (see site.js) */
.copy-email {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  margin-left: var(--space-2);
  padding: 0;
  vertical-align: -0.4em;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
}

.copy-email:hover {
  border-color: var(--color-link);
  color: var(--color-link);
}

.copy-email.is-copied {
  border-color: var(--color-success);
  color: var(--color-success);
}

img,
svg {
  max-width: 100%;
  height: auto;
}

/* Focus: high-visibility ring on every interactive element */
:focus-visible {
  outline: 3px solid var(--color-focus-ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Skip link */
.skip-link {
  position: absolute;
  left: var(--space-2);
  top: var(--space-2);
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface-raised);
  color: var(--color-link);
  border-radius: var(--radius-md);
  transform: translateY(-300%);
  transition: transform 0.15s;
}

.skip-link:focus {
  transform: none;
}

/* Layout */
.container {
  max-width: var(--layout-max-width);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.prose {
  max-width: var(--layout-prose-width);
}

main {
  display: block;
}

.section {
  padding-block: var(--space-16);
  scroll-margin-top: var(--space-16);
}

.section + .section {
  padding-top: 0;
}

/* Amber rule: the accent used as a section underline */
.rule {
  width: var(--space-12);
  height: 3px;
  background: var(--color-accent);
  border: 0;
  border-radius: var(--radius-full);
  margin: 0 0 var(--space-6);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 3.75rem;
}

/* Brand lockup, rendered as live text against tokens */
.lockup {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

/* Single terminal-style mark: ›dcr.aero (matches brand mark 5a). */
.lockup-mark {
  font-family: var(--font-mono);
  font-weight: var(--font-weight-medium);
  font-size: var(--type-size-md);
  color: var(--color-link);
  letter-spacing: 0.01em;
}

.lockup-mark .prompt {
  color: var(--color-amber);
  margin-right: 0.12em;
}

.lockup-mark .lockup-tld {
  color: var(--color-text-muted);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  flex-wrap: wrap;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem; /* >= 24px tap target (WCAG 2.5.8) */
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--type-size-sm);
}

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

/* Language switch: segmented toggle (real links, current = active) */
.lang-switch {
  display: inline-flex;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-full);
}

.lang-seg {
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--type-size-sm);
  line-height: 1.5;
  text-decoration: none;
  color: var(--color-text-muted);
  background: transparent;
}

.lang-seg:first-child {
  border-radius: var(--radius-full) 0 0 var(--radius-full);
}

.lang-seg:last-child {
  border-radius: 0 var(--radius-full) var(--radius-full) 0;
}

.lang-seg:hover {
  color: var(--color-link);
}

.lang-seg.active {
  background: var(--color-link);
  color: var(--color-bg);
  font-weight: var(--font-weight-medium);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font: inherit;
  font-size: var(--type-size-base);
  font-weight: var(--font-weight-medium);
  line-height: 1.2;
  cursor: pointer;
  text-decoration: none;
  background: var(--color-link);
  color: var(--color-bg);
}

.btn:hover {
  background: var(--color-link-hover);
  color: var(--color-bg);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  background: transparent;
  color: var(--color-link);
  border-color: var(--color-link);
}

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

.btn-small {
  padding: var(--space-2) var(--space-4);
  font-size: var(--type-size-sm);
}

/* Theme toggle and icon buttons */
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
}

.icon-btn:hover {
  border-color: var(--color-link);
  color: var(--color-link);
}

/* Theme toggle shows the mode you'd switch TO: moon in light, sun in dark.
   Pure CSS, mirroring the theme resolution in tokens.css. */
#theme-toggle .icon-sun {
  display: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) #theme-toggle .icon-moon {
    display: none;
  }
  :root:not([data-theme="light"]) #theme-toggle .icon-sun {
    display: inline-block;
  }
}

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

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

[data-theme="light"] #theme-toggle .icon-moon {
  display: inline-block;
}

[data-theme="light"] #theme-toggle .icon-sun {
  display: none;
}

/* Flightradar24 banner (temporary; will be replaced by self-hosted data) */
.fr24 {
  margin: var(--space-6) 0 0;
  max-width: 26rem;
}

.fr24-frame {
  display: block;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
  line-height: 0;
}

.fr24-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.fr24 figcaption {
  margin-top: var(--space-2);
  line-height: 1.4;
}

/* Cards and chips */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: 0;
  margin: 0;
  list-style: none;
}

.chip {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface-raised);
  font-size: var(--type-size-sm);
}

/* "next up" badge inside a chip (e.g. SwiftUI under Apple platforms) */
.chip-badge {
  display: inline-block;
  margin-right: 0.35em;
  padding: 0.05em 0.5em;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: var(--color-navy);
  font-size: 0.8em;
  font-weight: var(--font-weight-medium);
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 48rem) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Hero */
.hero {
  padding-block: var(--space-20) var(--space-16);
}

.hero-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  align-items: flex-start;
}

@media (min-width: 48rem) {
  .hero-inner {
    flex-direction: row;
    align-items: center;
    gap: var(--space-12);
  }
}

.hero h1 {
  font-size: var(--type-size-3xl);
  margin-bottom: var(--space-3);
  color: var(--color-heading);
}

.hero .tagline {
  font-size: var(--type-size-lg);
  line-height: var(--type-leading-snug);
  margin-bottom: var(--space-3);
}

.hero .support {
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.hero-photo {
  width: 11rem;
  height: 11rem;
  flex: none;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

/* Forms */
.field {
  margin-bottom: var(--space-5);
}

.field label {
  display: block;
  font-weight: var(--font-weight-medium);
  font-size: var(--type-size-sm);
  margin-bottom: var(--space-2);
}

.field input,
.field textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font: inherit;
  color: var(--color-text);
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
}

.field input:focus-visible,
.field textarea:focus-visible {
  outline: 3px solid var(--color-focus-ring);
  outline-offset: 0;
  border-color: var(--color-focus-ring);
}

.field .error,
.form-errors {
  color: var(--color-danger);
  font-size: var(--type-size-sm);
  margin-top: var(--space-2);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0 var(--space-5);
}

@media (min-width: 48rem) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

.form-status {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  font-size: var(--type-size-sm);
}

.form-status.success {
  color: var(--color-success);
  border-color: currentColor;
}

.form-status.error {
  color: var(--color-danger);
  border-color: currentColor;
}

/* Honeypot: visually removed, still in the DOM for bots */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Consent banner */
.consent-banner {
  position: fixed;
  inset-inline: 0;
  bottom: 0;
  z-index: 90;
  background: var(--color-surface-raised);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-4);
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.12);
}

.consent-banner[hidden] {
  display: none;
}

.consent-banner .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  justify-content: space-between;
}

.consent-banner p {
  margin: 0;
  font-size: var(--type-size-sm);
  max-width: 46rem;
}

.consent-actions {
  display: flex;
  gap: var(--space-3);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-10);
  margin-top: var(--space-16);
  font-size: var(--type-size-sm);
  color: var(--color-text-muted);
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-8);
  justify-content: space-between;
  align-items: center;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a,
.btn-link-plain {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem; /* >= 24px tap target (WCAG 2.5.8) */
  color: var(--color-text-muted);
}

.footer-links a:hover {
  color: var(--color-link);
}

/* Link-styled button (footer "Manage cookies") */
.btn-link-plain {
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
  cursor: pointer;
}

.btn-link-plain:hover {
  color: var(--color-link);
}

/* Social links */
.social-links {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* Style guide swatches */
.swatch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
  gap: var(--space-4);
}

.swatch {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.swatch-color {
  height: 4rem;
}

.swatch-meta {
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--type-size-xs);
}

.token-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--type-size-sm);
}

.token-table th,
.token-table td {
  text-align: left;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.token-table td:first-child {
  font-family: var(--font-mono);
  font-size: var(--type-size-xs);
}

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

[hidden] {
  display: none !important;
}