/* 같이타 모바일 화면.
   색: 민준님 웹 시제품의 보라를 강조색 하나로 쓰고, 무채색은 같은 보랏빛 회색으로 맞춘다.
   모서리: 카드 20px, 단추·입력·칩 14px, 상태 표시만 알약 모양.
   대비는 frontend/contrast.test.mjs가 검사한다. */
:root {
  --bg: #f6f5f9;
  --surface: #ffffff;
  --ink: #1f1d2b;
  --ink-2: #5a5669;
  --line: #e4e1eb;
  --accent: #5b47b0;
  --accent-soft: #efebfa;
  --on-accent: #ffffff;
  --rec: #b3261e;
  --ok: #1b7350;
  --r-card: 20px;
  --r-ctl: 14px;
  --pad: 20px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17161f;
    --surface: #22202d;
    --ink: #ece9f3;
    --ink-2: #aaa5ba;
    --line: #383549;
    --accent: #b6a6ee;
    --accent-soft: #2f2a47;
    --on-accent: #17161f;
    --rec: #ff9288;
    --ok: #74d3a8;
  }
}

* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.5 "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  word-break: keep-all;
  -webkit-text-size-adjust: 100%;
}
main {
  max-width: 480px;
  min-height: 100dvh;
  margin: 0 auto;
  padding: 16px var(--pad) calc(112px + env(safe-area-inset-bottom));
  display: grid;
  align-content: start;
  gap: 16px;
}
h1 {
  margin: 12px 0 0;
  font-size: 28px;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.02em;
}
h2 {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
p {
  margin: 0;
}
.sub {
  color: var(--ink-2);
}
small,
.meta {
  font-size: 15px;
  color: var(--ink-2);
}
.brand {
  font-weight: 700;
  color: var(--accent);
}

/* 배치 */
.row,
.top,
.between {
  display: flex;
  align-items: center;
  gap: 8px;
}
.top,
.between {
  justify-content: space-between;
}
.top {
  min-height: 48px;
}
.grow {
  flex: 1;
}
.stack {
  display: grid;
  gap: 12px;
}
.card {
  background: var(--surface);
  border-radius: var(--r-card);
  padding: 20px;
  display: grid;
  gap: 16px;
}
ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
li {
  display: grid;
  gap: 10px;
}
li + li {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
li.closed .what {
  color: var(--ink-2);
  text-decoration: line-through;
}
.what {
  font-size: 18px;
  font-weight: 600;
}

/* 단추와 입력 */
button,
input,
select {
  font: inherit;
  color: inherit;
}
button {
  min-height: 48px;
  padding: 0 16px;
  border: 0;
  border-radius: var(--r-ctl);
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.12s ease;
}
button:active {
  transform: scale(0.98);
}
button.primary {
  min-height: 56px;
  background: var(--accent);
  color: var(--on-accent);
  font-size: 18px;
}
button.plain {
  background: none;
  color: var(--ink-2);
  padding: 0 4px;
}
button:disabled {
  background: var(--line);
  color: var(--ink-2);
  cursor: not-allowed;
}
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
.field {
  display: grid;
  gap: 8px;
}
.field > span,
legend {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-2);
}
input:not([type="radio"]) {
  width: 100%;
  min-height: 56px;
  padding: 0 16px;
  border: 1.5px solid var(--line);
  border-radius: var(--r-ctl);
  background: var(--surface);
  font-size: 19px;
}
input:not([type="radio"]):focus {
  outline: 0;
  border-color: var(--accent);
}
input::placeholder {
  color: var(--ink-2);
}
input.code {
  text-align: center;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}
fieldset {
  border: 0;
  margin: 0;
  padding: 0;
  min-width: 0;
  display: grid;
  gap: 8px;
}
legend {
  padding: 0;
}

/* 하나를 고르는 칩. 실제로는 라디오 단추라 키보드로도 고를 수 있다. */
.chips {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.chips.two {
  grid-template-columns: repeat(2, 1fr);
}
.chips.free {
  display: flex;
  flex-wrap: wrap;
}
.chip {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 48px;
  padding: 6px 12px;
  border-radius: var(--r-ctl);
  border: 1.5px solid var(--line);
  background: var(--surface);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
}
.chip input {
  position: absolute;
  inset: 0;
  opacity: 0;
  margin: 0;
  cursor: inherit;
}
.chip:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}
.chip:has(input:focus-visible) {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
.chip:has(input:disabled) {
  background: var(--bg);
  color: var(--ink-2);
  cursor: not-allowed;
}
.chip small {
  font-weight: 500;
}

/* 좌석 배치: 위가 차 앞쪽 */
.car {
  display: grid;
  gap: 10px;
  padding: 16px;
  border-radius: 28px 28px var(--r-card) var(--r-card);
  background: var(--surface);
}
.car > .meta {
  text-align: center;
}
.car .front {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 56px;
}
.car .rear {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.car .chip {
  min-height: 76px;
  align-content: center;
  gap: 2px;
}
.car.readonly .chip {
  cursor: default;
}
.car.readonly .chip.me {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}
.car.readonly .chip.empty {
  border-style: dashed;
  color: var(--ink-2);
  font-weight: 500;
}

/* 온도 */
.temp {
  display: grid;
  grid-template-columns: 56px 1fr 56px;
  align-items: center;
  text-align: center;
}
.temp output {
  font-size: 44px;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.temp button {
  min-height: 56px;
  font-size: 26px;
  padding: 0;
}

/* 여행 상태 */
.state {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--bg);
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}
.pill.accent {
  background: var(--accent-soft);
  color: var(--accent);
}
.pill.ok {
  color: var(--ok);
}
.pill.rec {
  color: var(--rec);
}
.pill.rec::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}
@media (prefers-reduced-motion: no-preference) {
  .pill.rec::before {
    animation: blink 1.6s ease-in-out infinite;
  }
  .skeleton {
    animation: blink 1.4s ease-in-out infinite;
  }
  dialog[open] {
    animation: rise 0.22s cubic-bezier(0.2, 0.8, 0.2, 1);
  }
}
@keyframes blink {
  50% {
    opacity: 0.35;
  }
}
@keyframes rise {
  from {
    transform: translateY(24px);
    opacity: 0;
  }
}
.skeleton {
  height: 120px;
  border-radius: var(--r-card);
  background: var(--line);
}
.empty {
  padding: 8px 0;
  color: var(--ink-2);
}

/* 아래 고정 단추 */
.bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 12px var(--pad) calc(12px + env(safe-area-inset-bottom));
  background: linear-gradient(to top, var(--bg) 78%, transparent);
}
.bar > div {
  max-width: calc(480px - var(--pad) * 2);
  margin: 0 auto;
  display: grid;
  gap: 8px;
}

/* 부탁 남기기 시트 */
dialog {
  width: 100%;
  max-width: 480px;
  margin: auto auto 0;
  padding: 24px var(--pad) calc(20px + env(safe-area-inset-bottom));
  border: 0;
  border-radius: var(--r-card) var(--r-card) 0 0;
  background: var(--surface);
  color: var(--ink);
}
dialog::backdrop {
  background: rgb(23 22 31 / 0.5);
}
dialog form {
  display: grid;
  gap: 18px;
}
dialog input:not([type="radio"]) {
  background: var(--bg);
}

#toast {
  position: fixed;
  left: var(--pad);
  right: var(--pad);
  bottom: calc(96px + env(safe-area-inset-bottom));
  max-width: 440px;
  margin: 0 auto;
  padding: 14px 16px;
  border-radius: var(--r-ctl);
  background: var(--ink);
  color: var(--bg);
  font-weight: 600;
  text-align: center;
}

li .between {
  align-items: flex-start;
  gap: 12px;
}