/* SPDX-License-Identifier: GPL-3.0-only | Copyright (C) 2026 Tim Martinez */
:root {
  color-scheme: light;
  --bg: #f7f8fb;
  --surface: #ffffff;
  --surface-soft: #f1f4f8;
  --text: #15202b;
  --muted: #667484;
  --line: #dfe5ec;
  --accent: #0b7fd3;
  --accent-dark: #0867ae;
  --accent-teal: #12bec5;
  --accent-soft: #eaf7fd;
  --warning: #8b5d00;
  --warning-bg: #fff8e8;
  --warning-line: #f1d693;
  --success: #17643a;
  --success-bg: #eaf7ef;
  --shadow: 0 18px 50px rgba(18, 34, 51, 0.08);
  --radius: 22px;
  --radius-sm: 14px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}
button, input, textarea, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  background: var(--text);
  color: white;
  padding: .75rem 1rem;
  border-radius: .5rem;
}
.skip-link:focus { top: 1rem; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.hidden { display: none !important; }

.shell {
  width: min(1080px, calc(100% - 32px));
  margin-inline: auto;
}
.site-header {
  border-bottom: 1px solid rgba(223, 229, 236, .85);
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(14px);
  position: sticky;
  top: 0;
  z-index: 20;
}
.header-inner, .footer-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  min-width: 0;
}
.brand-logo {
  display: block;
  width: clamp(190px, 24vw, 248px);
  height: auto;
}
.privacy-note { color: var(--muted); font-size: .9rem; }

.main-shell { padding-block: 64px 80px; }
.hero { max-width: 780px; margin-bottom: 32px; }
.eyebrow {
  margin: 0 0 .5rem;
  color: var(--accent);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}
h1, h2, h3 { line-height: 1.12; letter-spacing: -.035em; }
h1 { margin: 0; font-size: clamp(2.55rem, 8vw, 5.2rem); max-width: 850px; }
h2 { font-size: clamp(1.5rem, 4vw, 2.25rem); margin: 0 0 .65rem; }
h3 { font-size: 1.08rem; margin: 0 0 .45rem; }
.hero-copy {
  margin: 1.25rem 0 0;
  max-width: 700px;
  color: var(--muted);
  font-size: clamp(1rem, 2.3vw, 1.2rem);
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.input-card { padding: clamp(20px, 4vw, 34px); }
.field-label {
  display: block;
  margin-bottom: .45rem;
  font-size: .9rem;
  font-weight: 750;
}
.input-stack {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: stretch;
}
textarea, input, select {
  width: 100%;
  color: var(--text);
  background: white;
  border: 1px solid #cfd7e0;
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}
textarea { min-height: 108px; resize: vertical; padding: 16px; font-size: 1.08rem; }
input, select { min-height: 48px; padding: 10px 12px; }
textarea:focus, input:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(11, 127, 211, .14);
}
.primary-button, .secondary-button, .button-link {
  min-height: 48px;
  border-radius: 13px;
  padding: 11px 16px;
  font-weight: 800;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  text-align: center;
  transition: transform .12s ease, background .12s ease, border-color .12s ease;
}
.primary-button { background: linear-gradient(135deg, var(--accent), #139bdc); color: white; }
.primary-button:hover { background: var(--accent-dark); }
.secondary-button, .button-link { background: white; color: var(--text); border-color: var(--line); }
.secondary-button:hover, .button-link:hover { background: var(--surface-soft); border-color: #cbd4de; }
.primary-button:active, .secondary-button:active, .button-link:active { transform: translateY(1px); }
.input-stack .primary-button { min-width: 155px; }

.example-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 14px;
  color: var(--muted);
  font-size: .86rem;
}
.example-chip {
  border: 1px solid var(--line);
  background: var(--surface-soft);
  color: var(--text);
  border-radius: 999px;
  padding: 6px 10px;
}
.example-chip:hover { border-color: #c7d0dc; background: #e9edf3; }
.parse-message { min-height: 1.3rem; margin-top: 13px; color: var(--muted); font-size: .92rem; }
.parse-message.error { color: #a33232; }
.parse-message.success { color: var(--success); }

.details-panel { border-top: 1px solid var(--line); margin-top: 18px; padding-top: 16px; }
.details-panel summary { cursor: pointer; font-weight: 800; color: var(--text); }
.details-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}
.wide-field { grid-column: 1 / -1; }
.field-help { margin: .4rem 0 0; font-size: .78rem; color: var(--muted); }
.detail-action { display: flex; align-items: end; }
.detail-action button { width: 100%; }

.ambiguity-card, .warning-card {
  margin-top: 22px;
  padding: 22px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
}
.ambiguity-card, .warning-card { background: var(--warning-bg); border-color: var(--warning-line); box-shadow: none; }
.warning-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: #ffe9ad;
  color: var(--warning);
  display: grid;
  place-items: center;
  font-weight: 900;
}
.warning-eyebrow { color: var(--warning); }
.ambiguity-card p, .warning-card p { margin-top: 0; }
.ambiguity-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.ambiguity-actions button { background: white; border: 1px solid var(--warning-line); border-radius: 12px; padding: 10px 13px; font-weight: 800; }

.result-section { margin-top: 22px; }
.result-card {
  padding: clamp(22px, 5vw, 42px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: clamp(16px, 4vw, 42px);
}
.result-column { min-width: 0; }
.result-column-you {
  padding: 22px;
  border-radius: 18px;
  background: linear-gradient(145deg, var(--accent-soft), #effcfb);
  border: 1px solid #cbe7f3;
}
.result-label { margin: 0 0 .55rem; color: var(--muted); font-size: .78rem; font-weight: 800; text-transform: uppercase; letter-spacing: .1em; }
.result-weekday { margin: 0; font-weight: 850; font-size: clamp(1.15rem, 2.5vw, 1.5rem); }
.result-time { margin: .1rem 0; font-size: clamp(2.25rem, 7vw, 4.7rem); line-height: 1; font-weight: 900; letter-spacing: -.06em; }
.result-date, .zone-label { margin: .35rem 0 0; color: var(--muted); }
.zone-label { font-size: .9rem; }
.conversion-arrow { text-align: center; color: var(--muted); }
.conversion-arrow span { display: block; font-size: 2rem; line-height: 1; color: var(--accent); }
.conversion-arrow small { display: block; margin-top: .4rem; max-width: 110px; }
.badge-row { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 14px; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  border-radius: 999px;
  padding: 6px 10px;
  font-size: .78rem;
  font-weight: 800;
  background: white;
  border: 1px solid #d5dff7;
}
.badge.warn { color: #854f00; background: #fff6da; border-color: #efd388; }
.warning-comparison { display: grid; gap: 8px; margin-top: 12px; }
.comparison-row {
  display: grid;
  grid-template-columns: minmax(120px, 1fr) auto;
  gap: 12px;
  background: rgba(255,255,255,.72);
  border: 1px solid rgba(229, 194, 108, .55);
  padding: 10px 12px;
  border-radius: 12px;
}
.comparison-row strong { font-variant-numeric: tabular-nums; }

.action-card { margin-top: 22px; padding: clamp(22px, 4vw, 32px); }
.confirmation-preview { color: var(--muted); max-width: 720px; margin-bottom: 0; }
.action-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; margin-top: 20px; }
.action-status { min-height: 1.4rem; margin: 10px 0 0; color: var(--success); font-size: .86rem; }

.why-section { padding: 72px 0 0; }
.why-section > h2 { max-width: 650px; }
.why-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 24px; }
.why-grid article { padding: 20px; border-top: 1px solid var(--line); }
.why-grid p { color: var(--muted); margin-bottom: 0; }

.site-footer { border-top: 1px solid var(--line); background: white; color: var(--muted); font-size: .86rem; }
.footer-brand { display: inline-flex; align-items: center; gap: .55rem; color: var(--text); text-decoration: none; }
.footer-brand img { display: block; border-radius: 9px; }
.footer-inner { min-height: 96px; padding-block: 18px; }
.footer-brand-block, .footer-meta { display: flex; flex-direction: column; gap: .35rem; }
.footer-meta { text-align: right; align-items: flex-end; }
.footer-meta a { color: var(--accent); font-weight: 700; text-underline-offset: 3px; }
.footer-meta a:hover { text-decoration-thickness: 2px; }
.copy-helper { position: fixed; left: -9999px; top: 0; opacity: 0; pointer-events: none; }

@media (max-width: 760px) {
  .shell { width: min(100% - 22px, 1080px); }
  .site-header { position: static; }
  .header-inner { min-height: 68px; }
  .brand-logo { width: 190px; }
  .privacy-note { display: none; }
  .main-shell { padding-top: 42px; padding-bottom: 58px; }
  .input-stack { grid-template-columns: 1fr; }
  .input-stack .primary-button { width: 100%; }
  .details-grid { grid-template-columns: 1fr; }
  .wide-field { grid-column: auto; }
  .result-card { grid-template-columns: 1fr; }
  .conversion-arrow { display: flex; align-items: center; gap: 10px; justify-content: center; }
  .conversion-arrow span { transform: rotate(90deg); }
  .result-column-you { padding: 18px; }
  .action-grid { grid-template-columns: 1fr 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .why-grid article { padding-inline: 0; }
  .footer-inner { align-items: flex-start; justify-content: center; flex-direction: column; padding-block: 22px; }
  .footer-meta { text-align: left; align-items: flex-start; }
}

@media (max-width: 460px) {
  .action-grid { grid-template-columns: 1fr; }
  .ambiguity-card, .warning-card { grid-template-columns: 1fr; }
  h1 { font-size: 2.7rem; }
  .result-time { font-size: 3.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}