/* Birthday Highlander – midnight precision instrument (Linear-style) */
:root {
  --color-void: #08090a;
  --color-carbon: #0f1011;
  --color-obsidian: #161718;
  --color-graphite: #23252a;
  --color-smoke: #383b3f;
  --color-ash: #62666d;
  --color-fog: #8a8f98;
  --color-mist: #d0d6e0;
  --color-bone: #e5e5e6;
  --color-paper: #ffffff;
  --color-acid-lime: #e4f222;
  --color-coral-red: #eb5757;

  --font-sans: 'Inter Variable', Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --radius-card: 12px;
  --radius-control: 6px;
  --radius-pill: 9999px;
  --shadow-inset: rgb(35, 37, 42) 0 0 0 1px inset;
  color-scheme: dark;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-void);
  color: var(--color-mist);
  font: 400 16px/1.5 var(--font-sans);
  font-feature-settings: "cv01" on, "ss03" on, "zero" on;
}

[hidden] { display: none !important; }

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

.skip-link {
  position: absolute; left: 8px; top: -60px; z-index: 20;
  background: var(--color-acid-lime); color: var(--color-void); padding: 8px 14px; border-radius: var(--radius-control); font-weight: 510;
}
.skip-link:focus { top: 8px; }

:focus-visible { outline: 2px solid var(--color-mist); outline-offset: 2px; }

/* Header */
.site-header { padding: 16px 16px 0; max-width: 1200px; margin: 0 auto; }
.brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 510; font-size: 1rem; color: var(--color-paper); }
.brand-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--color-acid-lime); }

/* Layout: single column on mobile, two columns with sticky globe on desktop */
.layout {
  display: grid;
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
  grid-template-areas: "intro" "globe" "details";
}
.intro { grid-area: intro; }
.globe-section { grid-area: globe; min-width: 0; }
.details { grid-area: details; min-width: 0; }

@media (min-width: 960px) {
  .layout {
    grid-template-columns: minmax(380px, 5fr) 6fr;
    grid-template-areas: "intro globe" "details globe";
    grid-template-rows: auto 1fr;
    column-gap: 40px;
    padding: 48px 24px 96px;
  }
  .globe-section { position: sticky; top: 16px; align-self: start; }
}

/* Intro */
h1 {
  margin: 14px 0 12px; font-size: clamp(2.5rem, 7vw, 4rem); font-weight: 510;
  line-height: 1; letter-spacing: -0.022em; color: var(--color-paper);
}
.accent { color: var(--color-fog); }
h2 { font-size: 1.25rem; font-weight: 510; margin: 0 0 12px; letter-spacing: -0.012em; color: var(--color-paper); }
.lede { color: var(--color-fog); margin: 0 0 24px; max-width: 52ch; }

/* Form */
.dob-form label { display: block; font-weight: 510; font-size: .8125rem; margin-bottom: 8px; color: var(--color-mist); }
.dob-row { display: flex; gap: 8px; flex-wrap: wrap; }
input[type="date"] {
  flex: 1 1 180px; min-width: 0; min-height: 44px; padding: 12px 14px;
  background: rgba(255, 255, 255, .02); color: var(--color-mist); border: 1px solid rgba(255, 255, 255, .08);
  border-radius: var(--radius-control); font: inherit; font-size: .875rem; color-scheme: dark;
}
input[type="date"]:hover { border-color: rgba(255, 255, 255, .16); }
input[type="date"]:focus { border-color: var(--color-mist); outline: none; }
input[aria-invalid="true"] { border-color: var(--color-coral-red); }
.hint { margin: 8px 0 0; color: var(--color-ash); font-size: .8125rem; }
.form-error { margin: 6px 0 0; min-height: 1.3em; color: var(--color-coral-red); font-size: .8125rem; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 10px 16px; border-radius: var(--radius-control); cursor: pointer;
  border: 1px solid var(--color-graphite); background: transparent; color: var(--color-mist);
  font: inherit; font-size: .875rem; font-weight: 510; letter-spacing: -0.011em; text-decoration: none;
  transition: border-color .12s ease, background .12s ease;
}
.btn:hover { border-color: var(--color-smoke); background: rgba(255, 255, 255, .05); }
.btn:active { background: rgba(255, 255, 255, .08); }
.btn-primary { background: var(--color-acid-lime); border-color: var(--color-acid-lime); color: var(--color-void); }
.btn-primary:hover { background: #ecf84a; border-color: #ecf84a; }
.btn-primary:active { background: var(--color-acid-lime); }

.btn-link { display: inline-block; margin-top: 8px; padding: 6px 0; border: 0; background: none; color: var(--color-fog); font: inherit; font-size: .875rem; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
.btn-link:hover { color: var(--color-paper); }

/* About dialog */
.about { width: min(640px, calc(100vw - 32px)); max-height: calc(100vh - 32px); padding: 0; border: 0; border-radius: var(--radius-card); background: var(--color-carbon); color: var(--color-mist); box-shadow: var(--shadow-inset), 0 24px 64px rgba(0, 0, 0, .6); overflow: hidden; }
.about[open] { display: flex; flex-direction: column; }
.about::backdrop { background: rgba(8, 9, 10, .75); }
.about-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 20px; border-bottom: 1px solid var(--color-graphite); }
.about-head h2 { margin: 0; font-size: 1.125rem; font-weight: 510; color: var(--color-paper); }
.about-close { width: 44px; height: 44px; margin: -8px -10px -8px 0; border: 0; border-radius: var(--radius-control); background: none; color: var(--color-fog); font-size: 1.5rem; line-height: 1; cursor: pointer; }
.about-close:hover { color: var(--color-paper); background: rgba(255, 255, 255, .05); }
.about-body { padding: 16px 20px 24px; overflow-y: auto; font-size: .9375rem; }
.about-body h3 { margin: 20px 0 8px; font-size: .8125rem; font-weight: 510; letter-spacing: .04em; text-transform: uppercase; color: var(--color-fog); }
.about-body p, .about-body ul, .about-body ol { margin: 0 0 8px; }
.about-body ul, .about-body ol { padding-left: 1.25rem; }
.about-body li { margin-bottom: 6px; }
.about-body strong { color: var(--color-paper); font-weight: 510; }
.about-note { padding: 12px 14px; border-radius: var(--radius-control); background: var(--color-obsidian); }
.about-body code { font-size: .875em; color: var(--color-paper); }

/* Results */
.results { scroll-margin-top: 12px; margin-top: 24px; padding: 24px; border-radius: var(--radius-card); background: var(--color-carbon); box-shadow: var(--shadow-inset); }
.born { margin: 0 0 12px; color: var(--color-fog); font-size: .9375rem; }
.alive { margin: 0; font-size: 1rem; }
.ticker {
  display: grid; font-size: clamp(2.6rem, 9vw, 4.5rem); line-height: 1; font-weight: 510;
  font-variant-numeric: tabular-nums; letter-spacing: -0.022em; color: var(--color-paper);
  margin: 8px 0; word-break: break-all;
}
.ticker > *, .ticker::after { grid-area: 1 / 1; }
.ticker::after { content: attr(data-final); visibility: hidden; }
.rank { margin: 12px 0 0; font-weight: 510; color: var(--color-paper); }
.progress { margin-top: 20px; padding-top: 16px; border-top: .5px solid var(--color-smoke); }
.progress-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; color: var(--color-fog); font-size: .8125rem; }
.progress-head strong { color: var(--color-paper); font-size: 1.25rem; font-weight: 510; font-variant-numeric: tabular-nums; }
.progress-bar { margin-top: 8px; height: 6px; border-radius: var(--radius-pill); background: var(--color-graphite); overflow: hidden; }
.progress-bar i { display: block; height: 100%; width: 0; min-width: 4px; border-radius: var(--radius-pill); background: var(--color-acid-lime); transition: width 1.6s cubic-bezier(0.16, 1, 0.3, 1); }
.progress-text { margin: 8px 0 0; color: var(--color-fog); font-size: .8125rem; }
@media (prefers-reduced-motion: reduce) { .progress-bar i { transition: none; } }

.error-state { margin-top: 24px; padding: 16px; border: 1px solid var(--color-coral-red); border-radius: var(--radius-card); background: var(--color-carbon); }
.error-state p { margin: 0 0 12px; }

/* Globe */
.globe-stage {
  position: relative; width: 100%; aspect-ratio: 1 / 1; max-height: 78vh;
  border-radius: var(--radius-card); overflow: hidden;
  background: var(--color-carbon); box-shadow: var(--shadow-inset);
  touch-action: pan-y; cursor: grab;
}
.globe-stage:active { cursor: grabbing; }
.globe-stage canvas { display: block; width: 100%; height: 100%; }
.globe-stage canvas.flat-map { height: auto; position: absolute; top: 50%; transform: translateY(-50%); }
.globe-status { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; gap: 12px; text-align: center; padding: 20px; color: var(--color-fog); font-size: .875rem; pointer-events: none; z-index: 2; }
.globe-status.is-error { color: var(--color-coral-red); }
.spinner { width: 18px; height: 18px; border: 2px solid var(--color-graphite); border-top-color: var(--color-mist); border-radius: 50%; animation: spin .9s linear infinite; }
.globe-status.is-error .spinner, .globe-status.is-done .spinner { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }
.stage-hint { position: absolute; left: 0; right: 0; bottom: 10px; margin: 0; text-align: center; font-size: .75rem; color: var(--color-fog); pointer-events: none; }

.popup {
  position: absolute; z-index: 3; pointer-events: none; min-width: 190px; max-width: 260px;
  padding: 8px 12px; background: var(--color-obsidian); border-radius: var(--radius-control);
  box-shadow: var(--shadow-inset), rgba(8, 9, 10, .6) 0 4px 32px; font-size: .8125rem; line-height: 1.4;
}
.popup strong { display: block; font-size: .9375rem; font-weight: 510; color: var(--color-paper); margin-bottom: 2px; }
.popup .pop-num { color: var(--color-paper); font-weight: 510; font-variant-numeric: tabular-nums; }
.popup .pop-muted { color: var(--color-fog); }

.heat-mode { display: inline-flex; gap: 4px; margin-top: 12px; padding: 3px; border-radius: var(--radius-pill); background: rgba(208,214,224,.08); }
.heat-mode[hidden] { display: none; }
.heat-mode button { font: inherit; font-size: .75rem; padding: 4px 12px; border: 0; border-radius: var(--radius-pill); background: transparent; color: var(--color-fog); cursor: pointer; }
.heat-mode button[aria-pressed="true"] { background: rgba(208,214,224,.18); color: #fff; }
.heat-mode button:focus-visible { outline: 2px solid var(--color-fog); outline-offset: 1px; }
.legend { display: flex; align-items: center; gap: 8px; margin-top: 12px; font-size: .75rem; color: var(--color-fog); }
.legend-bar { flex: 1; height: 6px; border-radius: var(--radius-pill); background: linear-gradient(90deg, #22d3ee 0%, #fde047 45%, #f97316 75%, #ef4444 100%); }
.legend-note { margin: 4px 0 0; font-size: .75rem; color: var(--color-ash); }

/* Top countries */
.top-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.top-list li { display: grid; grid-template-columns: 1.6em 1fr auto; align-items: center; gap: 4px 8px; font-size: .9375rem; }
.top-list .rk { color: var(--color-ash); font-variant-numeric: tabular-nums; }
.top-list .nm { font-weight: 510; color: var(--color-paper); }
.top-list .val { color: var(--color-mist); font-variant-numeric: tabular-nums; text-align: right; }
.top-list .bar { grid-column: 2 / 4; height: 4px; border-radius: var(--radius-pill); background: var(--color-graphite); overflow: hidden; }
.top-list .bar > i { display: block; height: 100%; border-radius: var(--radius-pill); background: var(--color-mist); }

/* Share */
.share-title { margin-top: 40px; }
.card { width: 100%; height: auto; border-radius: var(--radius-card); background: var(--color-carbon); box-shadow: var(--shadow-inset); }
.share-buttons { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.share-status { min-height: 1.4em; margin: 8px 0 0; color: var(--color-fog); font-size: .8125rem; }

/* Footer */
.site-footer { max-width: 1200px; margin: 0 auto; padding: 8px 16px 40px; color: var(--color-ash); font-size: .75rem; }
.site-footer p { margin: 0; max-width: 80ch; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}