/* ROBERIN airport-timezone-calculator (공항 시차 & 비행시간 계산기) - The New workspace (20260715a)
 * Scope: .tn-atc-* only. New IA: input-left (route presets + departure/arrival + date/time/duration)
 * result-right (arrival main + summary + metric cards + basis + DST note). Config-driven, 5 locales.
 * Gates: input-left (#3), no Calculate button / realtime (#17), container gap owns spacing (#22/#37),
 * uniform 1px borders / no decorative rail (#11/#30), field label separation 5px (#34/#4),
 * flipped dark tokens with text-fill on every surface (#8/#14), 2-col result skeleton no void (#10),
 * native select custom chevron+appearance (#33), element reset limited to li/ul/ol/dd (#37). */

.tn-atc-page {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  color: #1a1208;
  -webkit-text-fill-color: currentColor;
}
.tn-atc-page,
.tn-atc-page * { box-sizing: border-box; }

.tn-atc-tool {
  --atc-ink: #1a1208;
  --atc-muted: #5a4a30;
  --atc-line: #b8a888;
  --atc-soft: #cbb692;
  --atc-paper: #fffdf8;
  --atc-wash: #f6eddc;
  --atc-surface: #fffdf8;
  --atc-card: #fbf4e6;
  --atc-band-bg: #f9f1e2;
  --atc-track: #e7dcc4;
  --atc-accent: #b4600f;
  --atc-accent-soft: #f0e0c8;
  --atc-accent-ink: #fffdf8;
  --atc-btn-sec-bg: #f2e7d3;
  --atc-btn-sec-hover: #e7d8bd;
  --atc-btn-sec-text: #3a2c18;
  --atc-dep: #2f6d92;
  --atc-dep-bg: #e2ecf2;
  --atc-arr: #b4600f;
  --atc-arr-bg: #f4e6d2;
  color: var(--atc-ink);
  -webkit-text-fill-color: var(--atc-ink);
  font-family: inherit;
  display: grid;
  gap: 16px;
}

.tn-atc-tool ul,
.tn-atc-tool ol,
.tn-atc-tool li,
.tn-atc-tool dd { margin: 0; padding: 0; list-style: none; }

/* ---- workspace split ---- */
.tn-atc-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 0;
  border: 1px solid var(--atc-line);
  background: var(--atc-surface);
}
.tn-atc-input,
.tn-atc-result {
  display: grid;
  align-content: start;
  gap: 14px;
  padding: 16px;
  min-width: 0;
}
.tn-atc-input {
  border-right: 1px solid var(--atc-line);
  background: var(--atc-wash);
}
.tn-atc-pane-label {
  margin: 0;
  font: 700 12px/1 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--atc-muted);
  -webkit-text-fill-color: var(--atc-muted);
}
.tn-atc-band-label {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 8px;
  font: 700 11px/1.3 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--atc-muted);
  -webkit-text-fill-color: var(--atc-muted);
}
.tn-atc-band-label small {
  font: 500 11px/1.3 inherit;
  letter-spacing: 0;
  text-transform: none;
  color: var(--atc-muted);
  -webkit-text-fill-color: var(--atc-muted);
}

/* ---- route presets ---- */
.tn-atc-presets { display: grid; gap: 8px; }
.tn-atc-preset-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.tn-atc-preset {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px;
  border: 1px solid var(--atc-soft);
  background: var(--atc-card);
  font: 600 12px/1.1 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color: var(--atc-ink);
  -webkit-text-fill-color: var(--atc-ink);
  cursor: pointer;
}
.tn-atc-preset:hover { border-color: var(--atc-accent); background: var(--atc-accent-soft); }
.tn-atc-preset:focus-visible { outline: 2px solid var(--atc-accent); outline-offset: 2px; }

/* ---- input fields ---- */
.tn-atc-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.tn-atc-field {
  display: grid;
  gap: 5px;
  align-content: start;
  min-width: 0;
}
.tn-atc-field--full { grid-column: 1 / -1; }
.tn-atc-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--atc-muted);
  -webkit-text-fill-color: var(--atc-muted);
}
.tn-atc-hint {
  font-size: 11px;
  line-height: 1.4;
  min-height: 15.4px;
  color: var(--atc-muted);
  -webkit-text-fill-color: var(--atc-muted);
}
.tn-atc-hint b { font-weight: 700; font-style: normal; -webkit-text-fill-color: initial; }
.tn-atc-hint.is-dep b { color: var(--atc-dep); -webkit-text-fill-color: var(--atc-dep); }
.tn-atc-hint.is-arr b { color: var(--atc-arr); -webkit-text-fill-color: var(--atc-arr); }
.tn-atc-control {
  display: flex;
  align-items: stretch;
  min-width: 0;
  height: 36px;
  border: 1px solid var(--atc-line);
  background: var(--atc-paper);
}
.tn-atc-control input {
  flex: 1 1 auto;
  width: 100%;
  min-width: 0;
  padding: 0 10px;
  border: 0;
  background: transparent;
  color: var(--atc-ink);
  -webkit-text-fill-color: var(--atc-ink);
  font: 600 14px/1 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}
.tn-atc-control input::placeholder { color: var(--atc-muted); -webkit-text-fill-color: var(--atc-muted); opacity: 0.55; }
.tn-atc-control input:focus-visible {
  outline: 2px solid var(--atc-accent);
  outline-offset: -2px;
}
.tn-atc-control input::-webkit-calendar-picker-indicator { cursor: pointer; opacity: 0.6; }
.tn-atc-control--select select {
  flex: 1 1 auto;
  width: 100%;
  min-width: 0;
  height: 100%;
  padding: 0 32px 0 10px;
  border: 0;
  background: transparent;
  color: var(--atc-ink);
  -webkit-text-fill-color: var(--atc-ink);
  font: 600 13px/1 inherit;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%235a4a30' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}
.tn-atc-control--select select:focus-visible {
  outline: 2px solid var(--atc-accent);
  outline-offset: -2px;
}

/* ---- route dep/arr blocks + swap ---- */
.tn-atc-route { display: grid; gap: 10px; }
.tn-atc-leg { display: grid; gap: 5px; }
.tn-atc-leg-head {
  display: flex;
  align-items: center;
  gap: 6px;
  font: 700 11px/1 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.tn-atc-leg-head.is-dep { color: var(--atc-dep); -webkit-text-fill-color: var(--atc-dep); }
.tn-atc-leg-head.is-arr { color: var(--atc-arr); -webkit-text-fill-color: var(--atc-arr); }
.tn-atc-leg-fields {
  display: grid;
  grid-template-columns: minmax(0, 0.42fr) minmax(0, 0.58fr);
  gap: 8px;
}
.tn-atc-swap-row { display: flex; justify-content: center; }
.tn-atc-swap {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 14px;
  border: 1px solid var(--atc-line);
  background: var(--atc-btn-sec-bg);
  color: var(--atc-btn-sec-text);
  -webkit-text-fill-color: var(--atc-btn-sec-text);
  font: 700 12px/1 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  cursor: pointer;
}
.tn-atc-swap:hover { background: var(--atc-btn-sec-hover); }
.tn-atc-swap:focus-visible { outline: 2px solid var(--atc-accent); outline-offset: 2px; }

/* ---- command / actions ---- */
.tn-atc-command { display: grid; gap: 8px; }
.tn-atc-actions--single { grid-template-columns: minmax(0, 1fr); }
.tn-atc-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
.tn-atc-secondary {
  height: 38px;
  border: 1px solid var(--atc-line);
  background: var(--atc-btn-sec-bg);
  color: var(--atc-btn-sec-text);
  -webkit-text-fill-color: var(--atc-btn-sec-text);
  font: 700 13px/1 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.tn-atc-secondary:hover { background: var(--atc-btn-sec-hover); }
.tn-atc-secondary:focus-visible { outline: 2px solid var(--atc-accent); outline-offset: 2px; }
.tn-atc-primary {
  border-color: var(--atc-accent);
  background: var(--atc-accent);
  color: var(--atc-accent-ink);
  -webkit-text-fill-color: var(--atc-accent-ink);
}
.tn-atc-primary:hover { background: #9c5209; }

.tn-atc-status {
  margin: 0;
  padding: 10px 12px;
  border: 1px solid var(--atc-soft);
  background: var(--atc-band-bg);
  font-size: 12px;
  line-height: 1.5;
  color: var(--atc-muted);
  -webkit-text-fill-color: var(--atc-muted);
}

/* ---- result main (arrival) ---- */
.tn-atc-main {
  display: grid;
  gap: 4px;
  padding: 14px;
  border: 1px solid var(--atc-line);
  background: var(--atc-card);
}
.tn-atc-main > span {
  font-size: 12px;
  font-weight: 600;
  color: var(--atc-muted);
  -webkit-text-fill-color: var(--atc-muted);
}
.tn-atc-main strong {
  font: 800 clamp(26px, 5vw, 34px)/1.12 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color: var(--atc-ink);
  -webkit-text-fill-color: var(--atc-ink);
  letter-spacing: 0;
  word-break: keep-all;
}
.tn-atc-main-sub {
  font-size: 12px;
  font-style: normal;
  line-height: 1.45;
  color: var(--atc-muted);
  -webkit-text-fill-color: var(--atc-muted);
}
.tn-atc-main-sub b { font-weight: 700; -webkit-text-fill-color: initial; color: var(--atc-arr); }
body .tn-atc-main-sub b { color: var(--atc-arr); -webkit-text-fill-color: var(--atc-arr); }

/* ---- departure summary ---- */
.tn-atc-summary {
  display: grid;
  gap: 3px;
  padding: 11px 12px;
  border: 1px solid var(--atc-soft);
  background: var(--atc-dep-bg);
}
.tn-atc-summary span {
  font-size: 11px;
  font-weight: 600;
  color: var(--atc-dep);
  -webkit-text-fill-color: var(--atc-dep);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.tn-atc-summary strong {
  font: 700 15px/1.2 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color: var(--atc-ink);
  -webkit-text-fill-color: var(--atc-ink);
}
.tn-atc-summary em {
  font-size: 12px;
  font-style: normal;
  line-height: 1.4;
  color: var(--atc-muted);
  -webkit-text-fill-color: var(--atc-muted);
}

/* ---- result metric cards ---- */
.tn-atc-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
.tn-atc-metric {
  display: grid;
  gap: 4px;
  align-content: start;
  padding: 10px 12px;
  border: 1px solid var(--atc-soft);
  background: var(--atc-card);
}
.tn-atc-metric > span {
  font: 600 11px/1 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--atc-muted);
  -webkit-text-fill-color: var(--atc-muted);
}
.tn-atc-metric strong {
  font: 700 15px/1.25 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color: var(--atc-ink);
  -webkit-text-fill-color: var(--atc-ink);
  word-break: keep-all;
}
.tn-atc-metric.is-highlight { border-color: var(--atc-accent); background: var(--atc-accent-soft); }

/* ---- basis rows ---- */
.tn-atc-basis {
  display: grid;
  gap: 6px;
  padding: 11px 12px;
  border: 1px solid var(--atc-soft);
  background: var(--atc-band-bg);
}
.tn-atc-basis-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  align-items: baseline;
  justify-content: space-between;
  font-size: 12px;
  line-height: 1.45;
}
.tn-atc-basis-row span {
  font-weight: 600;
  color: var(--atc-muted);
  -webkit-text-fill-color: var(--atc-muted);
}
.tn-atc-basis-row strong {
  font-weight: 700;
  color: var(--atc-ink);
  -webkit-text-fill-color: var(--atc-ink);
  text-align: right;
}

/* ---- DST note ---- */
.tn-atc-note {
  display: grid;
  gap: 3px;
  padding: 10px 12px;
  border: 1px solid var(--atc-soft);
  background: var(--atc-accent-soft);
}
.tn-atc-note strong {
  font-size: 12px;
  font-weight: 700;
  color: var(--atc-arr);
  -webkit-text-fill-color: var(--atc-arr);
}
.tn-atc-note span {
  font-size: 11px;
  line-height: 1.5;
  color: var(--atc-muted);
  -webkit-text-fill-color: var(--atc-muted);
}

.tn-atc-disclaimer {
  margin: 2px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--atc-track);
  font-size: 11px;
  line-height: 1.5;
  color: var(--atc-muted);
  -webkit-text-fill-color: var(--atc-muted);
}

/* ---- mobile ---- */
@media (max-width: 720px) {
  .tn-atc-workspace { grid-template-columns: minmax(0, 1fr); }
  .tn-atc-input { border-right: 0; border-bottom: 1px solid var(--atc-line); }
}
@media (max-width: 440px) {
  /* Date+time and hour+minute stay 2-up (short inputs fit); route/select fields full-width. */
  .tn-atc-leg-fields { grid-template-columns: minmax(0, 1fr); }
  .tn-atc-metrics { grid-template-columns: minmax(0, 1fr); }
}

/* ---- Dark / inverse / auto-dark (#8/#14) ---- */
body:is([data-scheme="dark"], [data-scheme="inverse"], [data-scheme="auto"][data-d="dark"], [data-scheme="auto"][data-l="dark"]):not([data-scheme="light"]) .tn-atc-tool,
html[data-scheme="dark"] body:not([data-scheme="light"]) .tn-atc-tool,
html[data-scheme="inverse"] body:not([data-scheme="light"]) .tn-atc-tool {
  --atc-ink: #efe6d2;
  --atc-muted: #c3b492;
  --atc-line: #6f6047;
  --atc-soft: #574a37;
  --atc-paper: #241d12;
  --atc-wash: #221b11;
  --atc-surface: #1f1810;
  --atc-card: rgba(58, 48, 32, 0.5);
  --atc-band-bg: rgba(58, 48, 32, 0.36);
  --atc-track: rgba(120, 104, 74, 0.3);
  --atc-accent: #e0a24d;
  --atc-accent-soft: rgba(224, 162, 77, 0.2);
  --atc-accent-ink: #1f1810;
  --atc-btn-sec-bg: #33291a;
  --atc-btn-sec-hover: #453720;
  --atc-btn-sec-text: #efe6d2;
  --atc-dep: #79b2da;
  --atc-dep-bg: rgba(80, 130, 175, 0.24);
  --atc-arr: #e0a24d;
  --atc-arr-bg: rgba(180, 125, 45, 0.26);
  color: var(--atc-ink);
  -webkit-text-fill-color: var(--atc-ink);
}
body:is([data-scheme="dark"], [data-scheme="inverse"], [data-scheme="auto"][data-d="dark"], [data-scheme="auto"][data-l="dark"]):not([data-scheme="light"]) .tn-atc-primary,
html[data-scheme="dark"] body:not([data-scheme="light"]) .tn-atc-primary,
html[data-scheme="inverse"] body:not([data-scheme="light"]) .tn-atc-primary {
  color: #1f1810;
  -webkit-text-fill-color: #1f1810;
}
body:is([data-scheme="dark"], [data-scheme="inverse"], [data-scheme="auto"][data-d="dark"], [data-scheme="auto"][data-l="dark"]):not([data-scheme="light"]) .tn-atc-primary:hover,
html[data-scheme="dark"] body:not([data-scheme="light"]) .tn-atc-primary:hover,
html[data-scheme="inverse"] body:not([data-scheme="light"]) .tn-atc-primary:hover { background: #eab866; }
body:is([data-scheme="dark"], [data-scheme="inverse"], [data-scheme="auto"][data-d="dark"], [data-scheme="auto"][data-l="dark"]):not([data-scheme="light"]) .tn-atc-control--select select,
html[data-scheme="dark"] body:not([data-scheme="light"]) .tn-atc-control--select select,
html[data-scheme="inverse"] body:not([data-scheme="light"]) .tn-atc-control--select select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%23c3b492' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

@media (prefers-color-scheme: dark) {
  body[data-scheme="auto"]:not([data-scheme="light"]) .tn-atc-tool {
    --atc-ink: #efe6d2;
    --atc-muted: #c3b492;
    --atc-line: #6f6047;
    --atc-soft: #574a37;
    --atc-paper: #241d12;
    --atc-wash: #221b11;
    --atc-surface: #1f1810;
    --atc-card: rgba(58, 48, 32, 0.5);
    --atc-band-bg: rgba(58, 48, 32, 0.36);
    --atc-track: rgba(120, 104, 74, 0.3);
    --atc-accent: #e0a24d;
    --atc-accent-soft: rgba(224, 162, 77, 0.2);
    --atc-accent-ink: #1f1810;
    --atc-btn-sec-bg: #33291a;
    --atc-btn-sec-hover: #453720;
    --atc-btn-sec-text: #efe6d2;
    --atc-dep: #79b2da;
    --atc-dep-bg: rgba(80, 130, 175, 0.24);
    --atc-arr: #e0a24d;
    --atc-arr-bg: rgba(180, 125, 45, 0.26);
    color: var(--atc-ink);
    -webkit-text-fill-color: var(--atc-ink);
  }
  body[data-scheme="auto"]:not([data-scheme="light"]) .tn-atc-primary { color: #1f1810; -webkit-text-fill-color: #1f1810; }
  body[data-scheme="auto"]:not([data-scheme="light"]) .tn-atc-primary:hover { background: #eab866; }
  body[data-scheme="auto"]:not([data-scheme="light"]) .tn-atc-control--select select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%23c3b492' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  }
}