:root {
  --paper: #f5f7fa;
  --surface: #ffffff;
  --ink: #18223a;
  --muted: #5a6478;
  --line: #d9dee7;
  --link: #2b59c3;
  --focus: #2b59c3;
  --ad-bg: #eaedf2;
  --night: #1f2747;

  --font-ui: "Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-clock: "Big Shoulders Display", "Arial Narrow", sans-serif;

  --step--1: 0.875rem;
  --step-0: 1rem;
  --step-1: 1.25rem;
  --step-2: 1.5rem;
  --step-3: 2rem;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #141a2c;
    --surface: #1b2238;
    --ink: #e8ecf4;
    --muted: #a3acc0;
    --line: #2e3753;
    --link: #8fb0ff;
    --focus: #8fb0ff;
    --ad-bg: #20283f;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #141a2c;
  --surface: #1b2238;
  --ink: #e8ecf4;
  --muted: #a3acc0;
  --line: #2e3753;
  --link: #8fb0ff;
  --focus: #8fb0ff;
  --ad-bg: #20283f;
  color-scheme: dark;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: var(--step-0);
  line-height: 1.5;
}

a { color: var(--link); }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.skip {
  position: absolute;
  left: 16px;
  top: -100px;
  background: var(--ink);
  color: var(--paper);
  padding: 8px 12px;
  z-index: 100;
}
.skip:focus { top: 8px; }

h1, h2 { line-height: 1.2; margin: 0; }

button {
  font: inherit;
  cursor: pointer;
}

/* ---------- Header and footer ---------- */

.site-header,
.site-footer {
  max-width: 1440px;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
}

.brand {
  font-family: var(--font-clock);
  font-weight: 800;
  font-size: var(--step-3);
  line-height: 1;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.site-header nav,
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
}

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 48px;
  padding-top: 24px;
  padding-bottom: 32px;
  color: var(--muted);
  font-size: var(--step--1);
}
.site-footer p { margin: 0; }

/* ---------- Page grid and rails ---------- */

.page {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 16px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

main { min-width: 0; }

.rail { display: none; }

@media (min-width: 1100px) {
  .page { grid-template-columns: minmax(0, 1fr) 300px; }
  .rail-right { display: block; }
}

@media (min-width: 1440px) {
  .page { grid-template-columns: 160px minmax(0, 1fr) 300px; }
  .rail-left { display: block; }
}

/* Empty ad spaces are hidden (see hideEmptySpaces in ad-config.js); the grid closes up around them. */
.rail[hidden],
.ad-band[hidden],
.list-ad[hidden],
.tiles[hidden],
.ad[hidden] { display: none; }

@media (min-width: 1100px) {
  .no-rail-right .page { grid-template-columns: minmax(0, 1fr); }
  .no-rail-right .page,
  .no-rail-right .site-header,
  .no-rail-right .site-footer { max-width: 1040px; }
}
@media (min-width: 1440px) {
  .no-rail-left .page { grid-template-columns: minmax(0, 1fr) 300px; }
  .no-rail-right .page { grid-template-columns: 160px minmax(0, 1fr); }
  .no-rail-left.no-rail-right .page { grid-template-columns: minmax(0, 1fr); }
  .no-rail-left .page,
  .no-rail-left .site-header,
  .no-rail-left .site-footer,
  .no-rail-right .page,
  .no-rail-right .site-header,
  .no-rail-right .site-footer { max-width: 1240px; }
  .no-rail-left.no-rail-right .page,
  .no-rail-left.no-rail-right .site-header,
  .no-rail-left.no-rail-right .site-footer { max-width: 1040px; }
}

.rail .ad {
  position: sticky;
  top: 16px;
}

/* ---------- City search ---------- */

.search {
  padding: 24px 0 8px;
  max-width: 720px;
}

.search-label {
  display: block;
  font-size: var(--step-2);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 10px;
}

.search-box {
  position: relative;
}

.search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  pointer-events: none;
}

.search-box input {
  width: 100%;
  min-height: 56px;
  padding: 12px 16px 12px 50px;
  font: inherit;
  font-size: var(--step-1);
  color: var(--ink);
  background: var(--surface);
  border: 2px solid var(--ink);
  border-radius: 12px;
}
.search-box input::placeholder { color: var(--muted); }
.search-box input:focus-visible { outline-offset: 3px; }
.search-box input::-webkit-search-cancel-button { cursor: pointer; }

.search-results {
  position: absolute;
  z-index: 30;
  left: 0;
  right: 0;
  top: calc(100% + 6px);
  margin: 0;
  padding: 6px;
  list-style: none;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 12px 32px rgba(16, 24, 48, 0.16);
  max-height: min(60vh, 440px);
  overflow-y: auto;
}

.search-option {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas: "name time" "place time";
  align-items: center;
  column-gap: 16px;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  min-height: 48px;
}
.search-option:hover,
.search-option[aria-selected="true"] { background: var(--ad-bg); }
.option-name { grid-area: name; font-weight: 600; }
.option-place { grid-area: place; font-size: var(--step--1); color: var(--muted); }
.option-time {
  grid-area: time;
  font-family: var(--font-clock);
  font-weight: 800;
  font-size: var(--step-2);
  font-variant-numeric: tabular-nums;
}

.search-msg {
  min-height: 1.5em;
  margin: 6px 0 0;
  color: var(--muted);
  font-size: var(--step--1);
}

/* The result card takes the sky colour of the city's hour, like the clock rows. */
.search-card {
  --sky: #cfe4f5;
  --fg: #10182c;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas: "info clock" "actions actions";
  gap: 16px 24px;
  align-items: center;
  margin-top: 8px;
  padding: 20px 24px;
  border-radius: 14px;
  background: var(--sky);
  color: var(--fg);
}
.search-card[hidden] { display: none; }
.search-card.is-dark { --fg: #ffffff; }
.search-card :focus-visible { outline-color: currentColor; }

.card-info { grid-area: info; min-width: 0; }
.card-name { font-size: var(--step-3); font-weight: 600; }
.card-place,
.card-date,
.card-rel { margin: 2px 0 0; }
.card-place { font-weight: 500; }
.card-rel { font-weight: 600; margin-top: 8px; }

.card-clock {
  grid-area: clock;
  display: flex;
  align-items: center;
  gap: 16px;
}
.card-clock .dial { width: 96px; }
.card-time {
  margin: 0;
  font-family: var(--font-clock);
  font-weight: 800;
  font-size: clamp(3rem, 9vw, 4.5rem);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.card-time small { font-size: 0.42em; font-weight: 600; margin-left: 0.15em; }

.card-actions {
  grid-area: actions;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.card-actions button {
  min-height: 44px;
  padding: 8px 18px;
  border-radius: 999px;
  font-weight: 600;
}
.card-close {
  border: 2px solid currentColor;
  background: transparent;
  color: var(--fg);
}

@media (max-width: 599px) {
  .search-card {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas: "info" "clock" "actions";
    padding: 18px;
  }
  .card-clock .dial { width: 80px; }
}

/* ---------- Analog clock ---------- */

.dial {
  --dial-face: #cfe4f5;
  --hand: #10182c;
  display: block;
  width: 100%;
  height: auto;
}
.dial.is-dark { --hand: #ffffff; }
.dial-face { fill: var(--dial-face); stroke: var(--line); stroke-width: 1.5; }
.dial-tick { stroke: var(--hand); stroke-width: 2; stroke-linecap: round; opacity: 0.7; }
.dial-tick-major { stroke-width: 3.5; opacity: 1; }
.dial-hand { stroke: var(--hand); stroke-linecap: round; }
.dial-hour { stroke-width: 6; }
.dial-minute { stroke-width: 4; }
.dial-second { stroke: var(--hand); stroke-width: 1.5; stroke-linecap: round; opacity: 0.85; }
.dial-pin { fill: var(--hand); }

/* ---------- Hero ---------- */

.hero {
  padding: 24px 0 32px;
}

.hero-time {
  display: flex;
  align-items: center;
  gap: clamp(16px, 4vw, 48px);
}
.hero-dial {
  flex: none;
  width: clamp(84px, 18vw, 176px);
}

.hero-label {
  margin: 0;
  font-size: var(--step-1);
  color: var(--muted);
}

.hero-clock {
  margin: 0;
  font-family: var(--font-clock);
  font-weight: 800;
  font-size: clamp(5rem, 22vw, 12rem);
  line-height: 0.9;
  letter-spacing: -0.01em;
}
.hero-clock .d {
  display: inline-block;
  width: 0.5em;
  text-align: center;
}
.hero-clock .sep { display: inline-block; width: 0.22em; text-align: center; }
.hero-clock .sec {
  font-size: 0.38em;
  font-weight: 600;
  color: var(--muted);
  margin-left: 0.15em;
}
.hero-clock .sec .d { width: 0.44em; }
.hero-clock .ampm {
  font-size: 0.3em;
  font-weight: 600;
  margin-left: 0.25em;
}

.hero-date {
  margin: 8px 0 0;
  font-size: var(--step-1);
}

.shift {
  margin-top: 28px;
  max-width: 560px;
}
.shift label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
}
/* The slider track is your day: 12 hours back to 12 hours ahead, in sky colours. */
.shift input[type="range"] {
  --day-band: linear-gradient(90deg, #1f2747, #cfe4f5, #1f2747);
  -webkit-appearance: none;
  appearance: none;
  display: block;
  width: 100%;
  height: 44px;
  margin: 0;
  background: transparent;
  cursor: pointer;
}
.shift input[type="range"]::-webkit-slider-runnable-track {
  height: 28px;
  border-radius: 6px;
  background: var(--day-band);
}
.shift input[type="range"]::-moz-range-track {
  height: 28px;
  border-radius: 6px;
  background: var(--day-band);
}
.shift input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 8px;
  height: 44px;
  margin-top: -8px;
  border-radius: 4px;
  background: var(--ink);
  border: 2px solid var(--paper);
}
.shift input[type="range"]::-moz-range-thumb {
  width: 4px;
  height: 40px;
  border-radius: 4px;
  background: var(--ink);
  border: 2px solid var(--paper);
}
.shift input[type="range"]:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}
.shift-scale {
  display: flex;
  justify-content: space-between;
  margin: 2px 0 10px;
  font-size: var(--step--1);
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.shift-scale span:nth-child(3) { color: var(--ink); font-weight: 600; }
.shift-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  align-items: baseline;
  color: var(--muted);
}

.link-btn {
  background: none;
  border: 0;
  padding: 4px 0;
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- Clock list ---------- */

.clocks-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px 24px;
}
.clocks-head h1 {
  font-size: var(--step-3);
  font-weight: 600;
}

.tools {
  display: flex;
  gap: 16px;
  align-items: center;
}

.toggle {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  border-radius: 999px;
  padding: 6px 16px;
  min-height: 44px;
}
.toggle[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.city-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-radius: 14px;
  overflow: hidden;
}

.city {
  --sky: #cfe4f5;
  --fg: #10182c;
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 4px 16px;
  padding: 14px 20px;
  background: var(--sky);
  color: var(--fg);
}
.city.is-dark {
  --fg: #ffffff;
}
.city :focus-visible { outline-color: currentColor; }
.city.is-home .city-name::after {
  content: " (you)";
  font-weight: 400;
}

.city-name {
  margin: 0;
  font-size: var(--step-1);
  font-weight: 600;
  line-height: 1.25;
}
.city-meta {
  margin: 2px 0 0;
  font-size: var(--step--1);
  font-weight: 500;
}
.city-meta span + span::before {
  content: ", ";
}

.city-time {
  margin: 0;
  font-family: var(--font-clock);
  font-weight: 800;
  font-size: clamp(2.25rem, 7vw, 3.25rem);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.city-time small {
  font-size: 0.45em;
  font-weight: 600;
  margin-left: 0.15em;
}


.list-ad {
  background: var(--ad-bg);
  padding: 12px 8px;
}

.legend {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: var(--step--1);
}

/* ---------- Ads ---------- */

.ad-band {
  max-width: 1440px;
  margin: 0 auto;
  padding: 12px 16px;
}
.ad-band-bottom { padding: 32px 0 0; }

.ad {
  margin: 0 auto;
  max-width: 100%;
}

/* Reserve each space's height (ad + label) before it loads, so the page does not jump. */
.ad[data-size="728x90"] { min-height: 109px; }
.ad[data-size="300x250"] { min-height: 269px; }
.ad[data-size="336x280"] { min-height: 299px; }
.ad[data-size="160x600"],
.ad[data-size="300x600"] { min-height: 619px; }
@media (max-width: 767px) {
  .ad[data-size-sm="320x100"] { min-height: 119px; }
  .ad[data-size-sm="300x250"] { min-height: 269px; }
}

.ad-label {
  display: block;
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--muted);
  text-align: center;
}

.ad-slot {
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin: 0 auto;
  max-width: 100%;
}

.ad-placeholder {
  flex-direction: column;
  gap: 2px;
  background: var(--ad-bg);
  border: 1px dashed var(--line);
  color: var(--muted);
  font-size: var(--step--1);
  text-align: center;
  padding: 8px;
}
.ad-placeholder strong {
  color: var(--ink);
  font-weight: 600;
}

.ad-house img,
.ad-house video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.tiles {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px 16px;
  margin: 40px 0;
}
.tiles .ad { margin: 0; }

.ad-inline { margin: 24px auto; }

/* ---------- Guide ---------- */

.guide {
  max-width: 68ch;
}
.guide h2 {
  font-size: var(--step-2);
  font-weight: 600;
  margin: 32px 0 8px;
}
.guide p { margin: 0 0 12px; }
.guide details {
  border-top: 1px solid var(--line);
  padding: 12px 0;
}
.guide details:last-of-type { border-bottom: 1px solid var(--line); }
.guide summary {
  cursor: pointer;
  font-weight: 600;
}
.guide details p { margin: 8px 0 0; }

/* ---------- Floating video ad ---------- */

.video-dock {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 40;
  max-width: calc(100vw - 32px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 8px 28px rgba(16, 24, 48, 0.22);
  padding: 4px 8px 8px;
}
.video-dock[hidden] { display: none; }
.video-dock-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.video-dock .ad-label { text-align: left; }

.icon-close {
  border: 0;
  background: transparent;
  color: var(--ink);
  font-size: 1.25rem;
  line-height: 1;
  width: 32px;
  height: 32px;
  border-radius: 50%;
}
.icon-close:hover { background: var(--ad-bg); }

@media (max-width: 599px) {
  .video-dock { right: 8px; bottom: 8px; }
}

/* ---------- Full-screen ad ---------- */

.interstitial {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  flex-direction: column;
  background: rgba(16, 22, 40, 0.94);
  color: #f4f6fb;
  padding: 16px;
}
.interstitial[hidden] { display: none; }
.interstitial-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.interstitial-bar .ad-label { color: #c5cbe0; text-align: left; }
.interstitial-close {
  border: 1px solid rgba(255, 255, 255, 0.6);
  background: transparent;
  color: #fff;
  border-radius: 999px;
  padding: 8px 18px;
  font-weight: 600;
}
.interstitial-close:hover { background: rgba(255, 255, 255, 0.12); }
.interstitial-body {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
}
.interstitial .ad-placeholder {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.3);
  color: #c5cbe0;
}
.interstitial .ad-placeholder strong { color: #fff; }

body.no-scroll { overflow: hidden; }

/* ---------- Simple content pages ---------- */

/* Text pages (About, Privacy, 404) have no ad columns: one centred column. */
.text-page .page { grid-template-columns: minmax(0, 1fr); }
.text-page .page,
.text-page .site-header,
.text-page .site-footer { max-width: 1040px; }

.prose {
  max-width: 68ch;
  padding: 24px 0 0;
}
.prose h1 { font-size: var(--step-3); font-weight: 600; margin-bottom: 16px; }
.prose h2 { font-size: var(--step-2); font-weight: 600; margin: 32px 0 8px; }
.prose p, .prose li { margin: 0 0 12px; }
.prose table {
  border-collapse: collapse;
  width: 100%;
  margin: 8px 0 16px;
}
.prose th, .prose td {
  text-align: left;
  padding: 8px 12px 8px 0;
  border-bottom: 1px solid var(--line);
}

@media print {
  .ad, .ad-band, .rail, .video-dock, .interstitial, .tiles { display: none !important; }
}