:root {
  color-scheme: dark;
  --bg: #07111f;
  --bg-glow: radial-gradient(circle at top left, rgba(245, 158, 11, 0.18), transparent 32%),
    radial-gradient(circle at top right, rgba(14, 165, 233, 0.2), transparent 26%),
    linear-gradient(180deg, #08101c 0%, #0b1324 52%, #060b14 100%);
  --panel: rgba(12, 20, 34, 0.88);
  --panel-border: rgba(148, 163, 184, 0.18);
  --panel-shadow: 0 24px 80px rgba(2, 6, 23, 0.42);
  --text: #edf2ff;
  --muted: #8fa3bf;
  --accent: #f59e0b;
  --accent-strong: #fbbf24;
  --source: #4f46e5;
  --target: #06b6d4;
  --danger: #fb7185;
  --chip: rgba(15, 23, 42, 0.94);
  --input: rgba(6, 11, 23, 0.8);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", sans-serif;
  color: var(--text);
  background: var(--bg-glow);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.05) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.35), rgba(0, 0, 0, 0.9));
}

.page-shell {
  position: relative;
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

.page-header,
.layout-grid,
.clock-grid,
.field-grid,
.date-time-grid,
.result-flow,
.result-meta,
.compare-header,
.compare-controls,
.action-row {
  display: grid;
  gap: 16px;
}

.page-header {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 24px;
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-strong);
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2,
h3 {
  font-family: "DM Sans", sans-serif;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 4.7rem);
  line-height: 0.92;
  max-width: 10ch;
}

.hero-copy {
  margin-top: 16px;
  max-width: 62ch;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.7;
}

.language-switcher {
  display: flex;
  flex-wrap: wrap;
  justify-content: end;
  gap: 10px;
}

.language-switcher button,
.chip-button,
.ghost-button,
.primary-button,
.remove-button {
  border: 1px solid transparent;
  border-radius: 999px;
  font: inherit;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.language-switcher button {
  min-height: 44px;
  padding: 0 14px;
  background: rgba(8, 15, 28, 0.9);
  color: var(--muted);
  border-color: rgba(148, 163, 184, 0.18);
}

.language-switcher button.is-active {
  color: var(--text);
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.34), rgba(79, 70, 229, 0.34));
  border-color: rgba(251, 191, 36, 0.4);
  box-shadow: 0 14px 30px rgba(245, 158, 11, 0.18);
}

.layout-grid {
  gap: 22px;
}

.clock-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.panel,
.clock-card {
  position: relative;
  overflow: hidden;
  padding: 24px;
  border-radius: var(--radius);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  box-shadow: var(--panel-shadow);
  backdrop-filter: blur(18px);
}

.clock-card::after,
.panel::after {
  content: "";
  position: absolute;
  inset: 1px;
  border-radius: calc(var(--radius) - 1px);
  pointer-events: none;
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.clock-card {
  min-height: 220px;
}

.source-clock {
  background:
    linear-gradient(135deg, rgba(79, 70, 229, 0.2), rgba(10, 14, 23, 0) 55%),
    var(--panel);
}

.target-clock {
  background:
    linear-gradient(135deg, rgba(6, 182, 212, 0.2), rgba(10, 14, 23, 0) 55%),
    var(--panel);
}

.clock-label,
.panel-note,
.result-label,
.meta-label {
  color: var(--muted);
}

.clock-zone-name {
  margin-top: 12px;
  font-size: 1.5rem;
}

.clock-time {
  margin-top: 20px;
  font-family: "JetBrains Mono", monospace;
  font-size: clamp(2rem, 4vw, 3.8rem);
  letter-spacing: -0.04em;
  text-shadow: 0 0 22px rgba(255, 255, 255, 0.12);
  animation: breathe 4s ease-in-out infinite;
}

.clock-date {
  margin-top: 16px;
  color: var(--muted);
}

.panel-heading,
.featured-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
}

.panel-heading h2,
.compare-header h2 {
  font-size: 1.35rem;
  line-height: 1.3;
}

.panel-note {
  max-width: 28ch;
  text-align: right;
}

.field-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 22px;
}

.field {
  display: grid;
  gap: 10px;
}

.field span {
  font-size: 0.92rem;
}

input,
select {
  width: 100%;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 14px;
  background: var(--input);
  color: var(--text);
  font: inherit;
}

input {
  min-height: 48px;
  padding: 0 14px;
}

select {
  padding: 12px;
}

select option {
  padding: 10px;
}

.search-field select {
  min-height: 220px;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.chip-button {
  min-height: 44px;
  padding: 0 14px;
  background: var(--chip);
  color: var(--text);
  border-color: rgba(148, 163, 184, 0.18);
}

.chip-button:hover,
.ghost-button:hover,
.primary-button:hover,
.remove-button:hover,
.language-switcher button:hover {
  transform: translateY(-1px);
}

.date-time-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 20px;
}

.action-row {
  grid-template-columns: repeat(2, minmax(0, max-content));
  justify-content: start;
  margin-top: 22px;
}

.ghost-button,
.primary-button,
.remove-button {
  min-height: 46px;
  padding: 0 18px;
}

.ghost-button {
  background: rgba(15, 23, 42, 0.9);
  color: var(--text);
  border-color: rgba(79, 70, 229, 0.34);
}

.primary-button {
  color: #0b1120;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  box-shadow: 0 14px 28px rgba(245, 158, 11, 0.24);
}

.primary-button.small {
  min-height: 44px;
}

.remove-button {
  background: rgba(136, 19, 55, 0.22);
  color: #ffd7df;
  border-color: rgba(251, 113, 133, 0.3);
}

.form-error {
  min-height: 20px;
  margin-top: 14px;
  color: var(--danger);
}

.result-panel {
  background:
    linear-gradient(135deg, rgba(245, 158, 11, 0.22), rgba(10, 14, 23, 0) 36%),
    linear-gradient(225deg, rgba(251, 191, 36, 0.12), rgba(10, 14, 23, 0) 30%),
    var(--panel);
}

.result-empty {
  color: var(--muted);
}

.result-warning {
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.26);
  color: #c7f7ff;
  line-height: 1.5;
}

.result-card {
  animation: rise-in 0.3s ease;
}

.result-card.is-hidden {
  display: none;
}

.result-flow {
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  margin-top: 18px;
}

.result-flow h3 {
  font-size: 1.35rem;
}

.result-flow p:last-child {
  margin-top: 10px;
  color: var(--muted);
}

.result-arrow {
  font-size: 2rem;
  color: var(--accent-strong);
}

.result-meta {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(148, 163, 184, 0.16);
}

.result-meta strong {
  display: block;
  margin-top: 6px;
  font-family: "JetBrains Mono", monospace;
}

.compare-header {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
}

.compare-controls {
  grid-template-columns: minmax(220px, 280px) auto;
  align-items: center;
}

.compare-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.compare-card {
  padding: 18px;
  border-radius: 16px;
  background: rgba(8, 15, 28, 0.92);
  border: 1px solid rgba(148, 163, 184, 0.14);
}

.compare-card header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
}

.compare-card h3 {
  font-size: 1.08rem;
}

.compare-time {
  margin-top: 14px;
  font-family: "JetBrains Mono", monospace;
  font-size: 1.3rem;
}

.compare-date,
.compare-offset {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.94rem;
}

.is-hidden {
  display: none;
}

@keyframes breathe {
  0%,
  100% {
    opacity: 0.88;
    transform: scale(0.995);
  }

  50% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1023px) {
  .clock-grid,
  .field-grid,
  .compare-header,
  .compare-controls,
  .result-meta {
    grid-template-columns: 1fr;
  }

  .panel-note {
    text-align: left;
  }
}

@media (max-width: 767px) {
  .page-shell {
    width: min(100% - 20px, 1240px);
    padding-top: 20px;
  }

  .page-header,
  .clock-grid,
  .field-grid,
  .date-time-grid,
  .result-flow,
  .action-row {
    grid-template-columns: 1fr;
  }

  .language-switcher {
    justify-content: start;
  }

  .search-field select {
    min-height: 180px;
  }

  .result-arrow {
    display: none;
  }

  .ghost-button,
  .primary-button,
  .remove-button,
  .language-switcher button,
  .chip-button,
  input,
  select {
    min-height: 44px;
  }
}