:root {
  color-scheme: dark;
  --bg: #07121f;
  --surface: rgba(13, 30, 47, .72);
  --surface-hover: rgba(18, 40, 61, .9);
  --line: rgba(185, 218, 239, .14);
  --line-strong: rgba(185, 218, 239, .24);
  --text: #f4f8fb;
  --muted: #8fa6b9;
  --soft: #c2d2de;
  --accent: #73efcf;
  --accent-2: #72a7ff;
  --accent-glow: rgba(76, 224, 193, .22);
  --shadow: 0 30px 90px rgba(0, 0, 0, .36);
  --radius-lg: 34px;
  --radius-md: 22px;
  --page: min(1180px, calc(100vw - 40px));
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #edf4f6;
  --surface: rgba(255, 255, 255, .76);
  --surface-hover: rgba(255, 255, 255, .96);
  --line: rgba(28, 65, 80, .12);
  --line-strong: rgba(28, 65, 80, .22);
  --text: #102a36;
  --muted: #4f6873;
  --soft: #3f5c68;
  --accent: #08755d;
  --accent-2: #3978dc;
  --accent-glow: rgba(13, 169, 135, .17);
  --shadow: 0 30px 80px rgba(38, 77, 91, .15);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background: var(--bg);
  transition: color .35s ease, background-color .35s ease;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--bg);
  border-radius: 10px;
  background: var(--accent);
  font-size: .82rem;
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-150%);
  transition: transform .2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.sky {
  position: fixed;
  z-index: -1;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.sky__glow {
  position: absolute;
  width: 44rem;
  height: 44rem;
  border-radius: 50%;
  filter: blur(4px);
  opacity: .85;
}

.sky__glow--one {
  top: -24rem;
  right: -15rem;
  background: radial-gradient(circle, rgba(62, 149, 255, .25), transparent 67%);
}

.sky__glow--two {
  top: 22rem;
  left: -26rem;
  background: radial-gradient(circle, var(--accent-glow), transparent 68%);
}

.sky__grid {
  position: absolute;
  inset: 0;
  opacity: .17;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, #000 0%, transparent 70%);
}

.sky__noise {
  position: absolute;
  inset: 0;
  opacity: .28;
  background-image: radial-gradient(rgba(255, 255, 255, .12) .55px, transparent .7px);
  background-size: 5px 5px;
  mask-image: linear-gradient(to bottom, #000, transparent 80%);
}

.site-header,
main,
footer {
  width: var(--page);
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 96px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand__mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  color: var(--accent);
}

.brand__mark svg {
  width: 100%;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 1.7;
}

.brand__mark .brand__orbit {
  stroke: var(--accent-2);
  stroke-dasharray: 54 10;
  opacity: .72;
}

.brand__name {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: .08em;
}

.brand__name span {
  color: var(--muted);
  font-weight: 540;
  letter-spacing: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 650;
}

.live-badge > span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 5px var(--accent-glow);
}

.theme-toggle {
  position: relative;
  display: grid;
  width: 44px;
  height: 44px;
  padding: 0;
  place-items: center;
  color: var(--soft);
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  cursor: pointer;
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}

.theme-toggle:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  background: var(--surface-hover);
}

.theme-toggle:focus-visible {
  outline: 3px solid var(--accent-glow);
  outline-offset: 3px;
}

.theme-toggle svg {
  position: absolute;
  width: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 1.7;
  transition: opacity .25s ease, transform .35s ease;
}

.theme-toggle__moon {
  opacity: 0;
  transform: rotate(-35deg) scale(.6);
}

[data-theme="light"] .theme-toggle__sun {
  opacity: 0;
  transform: rotate(45deg) scale(.6);
}

[data-theme="light"] .theme-toggle__moon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

main {
  padding-block: clamp(72px, 9vw, 132px) 80px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(420px, 1.1fr);
  gap: clamp(48px, 7vw, 100px);
  align-items: center;
  min-height: 530px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 24px;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 760;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.eyebrow > span {
  width: 24px;
  height: 1px;
  background: var(--accent);
  box-shadow: 12px 0 16px var(--accent);
}

h1 {
  max-width: 660px;
  margin: 0;
  font-size: clamp(3.15rem, 6.2vw, 6.25rem);
  font-weight: 630;
  line-height: .96;
  letter-spacing: -.065em;
}

h1 em {
  color: var(--accent);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
}

.hero__lead {
  max-width: 480px;
  margin: 32px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  line-height: 1.75;
}

.sync-state {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-top: 34px;
  color: var(--soft);
  font-size: .78rem;
}

.sync-state svg {
  width: 17px;
  fill: none;
  stroke: var(--accent);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.sync-state.is-offline svg {
  stroke: #f8a86b;
}

.clock-card {
  position: relative;
  isolation: isolate;
  min-height: 430px;
  padding: clamp(28px, 4vw, 50px);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, var(--surface-hover), var(--surface));
  box-shadow: var(--shadow);
  backdrop-filter: blur(24px);
}

.clock-card::before {
  content: "";
  position: absolute;
  z-index: -1;
  width: 22rem;
  height: 22rem;
  right: -9rem;
  bottom: -12rem;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow), transparent 66%);
}

.clock-card__orbit {
  position: absolute;
  z-index: -1;
  width: 270px;
  height: 270px;
  top: -142px;
  right: -82px;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.clock-card__orbit span,
.clock-card__orbit i {
  position: absolute;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.clock-card__orbit span {
  inset: 30px;
}

.clock-card__orbit i {
  width: 9px;
  height: 9px;
  left: 30px;
  bottom: 44px;
  border: 0;
  background: var(--accent);
  box-shadow: 0 0 20px var(--accent);
}

.clock-card__top,
.clock-card__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: .78rem;
}

.clock-card__top {
  position: relative;
  z-index: 1;
  font-weight: 680;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.utc-offset {
  padding: 7px 10px;
  color: var(--soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  letter-spacing: .03em;
}

.main-time {
  display: flex;
  align-items: baseline;
  margin: 78px 0 12px;
  font-size: clamp(4rem, 8.4vw, 7.2rem);
  font-weight: 260;
  font-variant-numeric: tabular-nums;
  line-height: .86;
  letter-spacing: -.075em;
  white-space: nowrap;
}

.main-time b {
  position: relative;
  top: -.06em;
  margin-inline: .025em;
  color: var(--accent);
  font-size: .58em;
  font-weight: 400;
  opacity: .74;
  animation: pulse 2s ease-in-out infinite;
}

.main-date {
  display: block;
  color: var(--soft);
  font-size: clamp(.95rem, 1.6vw, 1.12rem);
  text-transform: capitalize;
}

.dayline {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  margin: 56px 0 20px;
}

.dayline__label {
  color: var(--muted);
  font-size: .68rem;
  font-variant-numeric: tabular-nums;
}

.dayline__track {
  height: 3px;
  overflow: hidden;
  border-radius: 99px;
  background: var(--line);
}

.dayline__track i {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  box-shadow: 0 0 12px var(--accent);
  transition: width 1s linear;
}

.world {
  padding-top: clamp(120px, 15vw, 210px);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 44px;
}

.section-heading .eyebrow {
  margin-bottom: 16px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(2.3rem, 4vw, 4rem);
  line-height: 1;
  letter-spacing: -.05em;
}

.section-heading > p {
  max-width: 430px;
  margin: 0 0 4px;
  color: var(--muted);
  line-height: 1.65;
}

.city-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.city-card {
  position: relative;
  min-width: 0;
  padding: 26px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  backdrop-filter: blur(16px);
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
}

.city-card:hover {
  transform: translateY(-5px);
  border-color: var(--line-strong);
  background: var(--surface-hover);
}

.city-card::after {
  content: "";
  position: absolute;
  width: 100px;
  height: 100px;
  right: -60px;
  bottom: -60px;
  border-radius: 50%;
  background: var(--phase-color, var(--accent));
  filter: blur(35px);
  opacity: .17;
}

.city-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 34px;
}

.city-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--phase-color, var(--accent));
  box-shadow: 0 0 12px var(--phase-color, var(--accent));
}

.city-offset {
  color: var(--muted);
  font-size: .7rem;
  font-weight: 680;
  letter-spacing: .05em;
}

.city-card h3 {
  margin: 0;
  font-size: 1.12rem;
}

.city-country {
  margin: 5px 0 27px;
  color: var(--muted);
  font-size: .78rem;
}

.city-time {
  display: block;
  font-size: clamp(2.35rem, 4vw, 3.45rem);
  font-weight: 320;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.055em;
}

.city-date {
  margin: 8px 0 0;
  color: var(--soft);
  font-size: .76rem;
  text-transform: capitalize;
}

.city-card[data-phase="dawn"] {
  --phase-color: #ffb37c;
}

.city-card[data-phase="day"] {
  --phase-color: #77d9ff;
}

.city-card[data-phase="dusk"] {
  --phase-color: #c693ff;
}

.city-card[data-phase="night"] {
  --phase-color: #6688e9;
}

.facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: clamp(110px, 14vw, 180px);
  padding: 46px 0;
  border-block: 1px solid var(--line);
}

.facts article {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 17px;
}

.facts svg {
  width: 32px;
  height: 32px;
  padding: 6px;
  color: var(--accent);
  border: 1px solid var(--line);
  border-radius: 10px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.6;
}

.facts h2 {
  margin: 1px 0 7px;
  font-size: .93rem;
}

.facts p {
  margin: 0;
  color: var(--muted);
  font-size: .78rem;
  line-height: 1.65;
}

footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 110px;
  color: var(--muted);
  font-size: .72rem;
}

footer p {
  margin: 0;
}

footer p:first-child {
  color: var(--soft);
  font-weight: 750;
  letter-spacing: .08em;
}

footer p:last-child {
  justify-self: end;
}

.footer-mark {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.noscript {
  position: fixed;
  z-index: 5;
  inset: auto 16px 16px;
  padding: 12px 16px;
  color: #fff;
  border-radius: 12px;
  background: #a74736;
  text-align: center;
}

.error-page {
  display: grid;
  min-height: 100vh;
  padding: 20px;
  place-items: center;
}

.error-page .error-card {
  width: min(640px, 100%);
  margin: 0;
  padding: clamp(34px, 7vw, 72px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(24px);
}

.error-code {
  margin: 70px 0 12px;
  color: var(--accent);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .22em;
}

.error-card h1 {
  font-size: clamp(2.8rem, 8vw, 5rem);
}

.error-card > p:not(.error-code) {
  max-width: 430px;
  margin: 24px 0 32px;
  color: var(--muted);
  line-height: 1.7;
}

.home-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-size: .85rem;
  font-weight: 700;
  text-decoration: none;
}

.home-link span {
  color: var(--accent);
  font-size: 1.2rem;
  transition: transform .2s ease;
}

.home-link:hover span {
  transform: translateX(4px);
}

@keyframes pulse {
  0%,
  100% { opacity: .35; }
  50% { opacity: .92; }
}

@media (max-width: 920px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero__copy {
    max-width: 680px;
  }

  .clock-card {
    width: 100%;
  }

  .city-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .facts {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

@media (max-width: 640px) {
  :root {
    --page: min(100% - 28px, 1180px);
    --radius-lg: 26px;
  }

  .site-header {
    min-height: 78px;
  }

  .live-badge {
    display: none;
  }

  main {
    padding-top: 56px;
  }

  .hero {
    gap: 46px;
  }

  h1 {
    font-size: clamp(2.8rem, 15vw, 4.5rem);
  }

  .hero__lead {
    margin-top: 24px;
  }

  .clock-card {
    min-height: 360px;
    padding: 25px 21px;
  }

  .main-time {
    margin-top: 68px;
    font-size: clamp(3.35rem, 17vw, 5.5rem);
  }

  .dayline {
    margin-top: 46px;
  }

  .clock-card__bottom {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
  }

  .city-grid {
    grid-template-columns: 1fr;
  }

  .city-card {
    padding: 24px;
  }

  .city-card__head {
    margin-bottom: 26px;
  }

  .facts {
    padding-block: 36px;
  }

  footer {
    grid-template-columns: 1fr auto;
    min-height: 92px;
  }

  footer p:nth-child(2) {
    display: none;
  }
}

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