/* ===== 設計變數（對應 .pen 檔的 token） ===== */
:root {
  --font-sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;

  --color-toyota-92: #FFD400;
  --color-toyota-95: #1FA851;
  --color-toyota-98: #1E6FE8;
  --color-toyota-01: #FF6900;

  --color-bg: #FFFFFF;
  --color-bg-card: #FAFAFA;
  --color-bg-soft: #F7F7F7;
  --color-input-bg: #FFFFFF;

  --color-border: #E5E5E5;
  --color-border-strong: #CCCCCC;

  --color-red: #BA222E;
  --color-red-dark: #8E1A24;
  --color-red-soft: #FFD9DD;

  --color-success: #1FA851;
  --color-black: #000000;

  --color-text-primary: #1A1A1A;
  --color-text-secondary: #58595B;
  --color-text-tertiary: #8C8C8C;
}

/* ===== Reset ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input {
  font-family: inherit;
}

ul,
li {
  list-style: none;
  margin: 0;
  padding: 0;
}

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

/* ===== 頁面框架 ===== */
.page {
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg);
  max-width: 1440px;
  margin: 0 auto;
}

/* ----- Section Header ----- */
.page__header {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 56px 40px 40px;
  background-color: var(--color-bg);
}

.page__title {
  font-size: 44px;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.2;
}

.page__accent {
  display: block;
  width: 64px;
  height: 4px;
  background-color: var(--color-red);
}

.page__desc {
  width: 100%;
  max-width: 840px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

/* ===== 卡片基底 ===== */
.cal__card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
}

/* ===== Calculator Section ===== */
.calculator {
  display: grid;
  grid-template-columns: minmax(0, 1fr) clamp(340px, 32vw, 380px);
  gap: 24px;
  padding: 8px 40px 40px;
  align-items: start;
}

/* ----- Form Card ----- */
.form {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 32px;
}

.form__head {
  display: flex;
  align-items: center;
  gap: 12px;
}

.form__bar {
  width: 4px;
  height: 24px;
  background-color: var(--color-red);
}

.form__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text-primary);
}

.form__body {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form__actions {
  display: flex;
  gap: 12px;
  padding-top: 8px;
}

/* ----- Field ----- */
.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field--gap-large {
  gap: 12px;
}

.field__label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.field__label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.field__hint {
  font-size: 11px;
  color: var(--color-text-tertiary);
}

.field__input {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 48px;
  padding: 0 16px;
  background-color: var(--color-input-bg);
  border: 1px solid var(--color-border-strong);
}

.field__input:focus-within {
  border-color: var(--color-red);
}

.field__input-text {
  flex: 1;
  min-width: 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
  background: transparent;
  border: none;
  outline: none;
  padding: 0;
  appearance: textfield;
  -moz-appearance: textfield;
}

.field__input-text::-webkit-outer-spin-button,
.field__input-text::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.field__unit {
  font-size: 13px;
  color: var(--color-text-tertiary);
}

/* ----- Fuel Tabs ----- */
.fuel-tabs {
  display: flex;
  border: 1px solid var(--color-border-strong);
}

.fuel-tabs__tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  height: 78px;
  padding: 12px;
  background-color: var(--color-bg);
  color: var(--color-text-secondary);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.fuel-tabs__tab + .fuel-tabs__tab {
  border-left: 1px solid var(--color-border-strong);
}

.fuel-tabs__tab:not(.fuel-tabs__tab--active):hover {
  background-color: var(--color-bg-soft);
}

.fuel-tabs__label {
  font-size: 14px;
  font-weight: 700;
}

.fuel-tabs__price {
  font-size: 12px;
  color: var(--color-text-tertiary);
}

.fuel-tabs__tab--active {
  background-color: var(--color-red);
  color: #FFFFFF;
}

.fuel-tabs__tab--active .fuel-tabs__price {
  color: #FFFFFF;
  font-weight: 600;
}

/* ----- Buttons ----- */
.fuel-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.fuel-btn--ghost {
  flex: 0 0 auto;
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  border: 1px solid var(--color-text-primary);
  white-space: nowrap;
}

.fuel-btn--ghost:hover {
  background-color: var(--color-bg-soft);
}

.fuel-btn--primary {
  flex: 1;
  background-color: var(--color-red);
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 1px;
}

.fuel-btn--primary:hover {
  background-color: var(--color-red-dark);
}

.fuel-btn__icon {
  flex: none;
}

/* ===== Price Card ===== */
.price-card {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 24px;
  width: 100%;
}

.price-card__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.price-card__heading {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.price-card__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text-primary);
}

.price-card__source {
  font-size: 11px;
  color: var(--color-text-tertiary);
}

.price-card__live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.price-card__live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-red);
  animation: pulse 1.6s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.price-card__live-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--color-text-primary);
}

.price-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.price-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
  padding: 0 16px;
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
}

.price-row__label {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.price-row__bar {
  width: 6px;
  height: 24px;
  background-color: var(--color-text-tertiary);
}

.price-row__bar--92 { background-color: var(--color-toyota-92); }
.price-row__bar--95 { background-color: var(--color-toyota-95); }
.price-row__bar--98 { background-color: var(--color-toyota-98); }
.price-row__bar--01 { background-color: var(--color-toyota-01); }

.price-row__name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.price-row__tag {
  margin-left: 4px;
  font-weight: 600;
}

.price-row__value {
  display: inline-flex;
  align-items: flex-end;
  gap: 4px;
}

.price-row__price {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1;
}

.price-row__unit {
  font-size: 11px;
  color: var(--color-text-tertiary);
}

.price-row--active {
  background-color: var(--color-red);
  border-color: var(--color-red);
}

.price-row--active .price-row__name,
.price-row--active .price-row__price {
  color: #FFFFFF;
}

.price-row--active .price-row__price {
  font-size: 24px;
}

.price-row--active .price-row__bar {
  background-color: #FFFFFF;
}

.price-row--active .price-row__unit {
  color: var(--color-red-soft);
}

.price-card__foot {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 12px;
}

.price-card__note {
  font-size: 11px;
  color: var(--color-text-tertiary);
}

/* ===== Result Section ===== */
.result {
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding: 40px 40px 80px;
  background-color: var(--color-bg-soft);
}

.result[hidden] {
  display: none;
}

.result__head {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.result__tag-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.result__tag {
  display: inline-block;
  padding: 6px 12px;
  background-color: var(--color-red);
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
}

.result__hint {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.result__title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text-primary);
}

/* ----- KPI ----- */
.kpi {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.kpi__card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  background-color: var(--color-bg);
}

.kpi__head {
  display: flex;
  align-items: center;
  gap: 8px;
}

.kpi__head--space-between {
  justify-content: space-between;
}

.kpi__head-left {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.kpi__icon {
  flex: none;
  color: var(--color-text-tertiary);
}

.kpi__icon--success { color: var(--color-success); }
.kpi__icon--white { color: #FFFFFF; }

.kpi__label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.kpi__label--white {
  color: #FFFFFF;
  font-weight: 700;
}

.kpi__value {
  display: inline-flex;
  align-items: flex-end;
  gap: 6px;
}

.kpi__currency {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-tertiary);
}

.kpi__currency--soft { color: var(--color-red-soft); }

.kpi__amount {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1;
}

.kpi__amount--white { color: #FFFFFF; }

.kpi__suffix {
  font-size: 13px;
  color: var(--color-text-tertiary);
}

.kpi__suffix--soft { color: var(--color-red-soft); }

.kpi__formula {
  font-size: 11px;
  color: var(--color-text-tertiary);
}

.kpi__formula--soft { color: var(--color-red-soft); }

.kpi__card--save {
  background-color: var(--color-red);
  border-color: var(--color-red);
}

.kpi__badge {
  display: inline-block;
  padding: 4px 8px;
  background-color: #FFFFFF;
  color: var(--color-red);
  font-size: 11px;
  font-weight: 700;
}

/* ----- Note ----- */
.cal__note {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
}

.note__icon {
  flex: none;
  color: var(--color-text-tertiary);
}

.note__body {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.note__title {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text-primary);
}

.note__desc {
  font-size: 12px;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

/* ===== 響應式：平板（769 ~ 1024） ===== */
@media (min-width: 769px) and (max-width: 1024px) {
  .page__header {
    padding: 40px 24px 24px;
  }

  /* 維持左右雙欄；側欄寬度收緊讓表單不被過度擠壓 */
  .calculator {
    grid-template-columns: minmax(0, 1fr) clamp(240px, 30vw, 300px);
    padding: 8px 24px 32px;
    gap: 16px;
  }

  /* 表單卡內距收斂 */
  .form {
    padding: 24px;
    gap: 20px;
  }

  .field__input {
    padding: 0 12px;
  }

  /* 油品 Tab 在窄欄縮高、字級略小 */
  .fuel-tabs__tab {
    height: 70px;
    padding: 10px 4px;
  }

  .fuel-tabs__label {
    font-size: 13px;
  }

  .fuel-tabs__price {
    font-size: 11px;
  }

  /* 按鈕區避免溢出 */
  .fuel-btn {
    padding: 0 18px;
  }

  .fuel-btn--ghost {
    padding: 0 14px;
  }

  /* 油價看板維持垂直排列，但縮小內距與字級 */
  .price-card {
    padding: 20px 16px;
    gap: 16px;
  }

  .price-card__title {
    font-size: 15px;
  }

  .price-row {
    padding: 0 12px;
    height: 56px;
  }

  .price-row__label {
    gap: 10px;
    min-width: 0;
  }

  .price-row__name {
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* 窄欄時隱藏「(使用中)」標籤，避免擠壓價格 */
  .price-row__tag {
    display: none;
  }

  .price-row__price {
    font-size: 20px;
  }

  .price-row--active .price-row__price {
    font-size: 22px;
  }

  .result {
    padding: 32px 24px 64px;
  }
}

/* ===== 響應式：手機版（對應 Mobile - 油耗計算機） ===== */
@media (max-width: 768px) {
  .page__header {
    padding: 24px 16px 8px;
    gap: 8px;
  }

  .page__title {
    font-size: 28px;
  }

  .page__accent {
    width: 48px;
    height: 3px;
  }

  .page__desc {
    font-size: 13px;
  }

  .calculator {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 8px 16px 16px;
  }

  .form {
    gap: 20px;
    padding: 20px;
  }

  .form__bar {
    width: 3px;
    height: 18px;
  }

  .form__title {
    font-size: 16px;
  }

  .form__body {
    gap: 20px;
  }

  .field {
    gap: 6px;
  }

  .field__label {
    font-size: 13px;
  }

  .field__hint {
    font-size: 10px;
  }

  .field__input {
    height: 54px;
    padding: 0 14px;
  }

  .field__input-text {
    font-size: 18px;
    font-weight: 700;
  }

  .field__unit {
    font-size: 12px;
  }

  .fuel-tabs__tab {
    height: 64px;
    gap: 2px;
  }

  .price-card {
    display: none;
  }

  .result {
    padding: 24px 16px 40px;
    gap: 20px;
  }

  .result__title {
    font-size: 22px;
  }

  .kpi {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .kpi__card {
    padding: 16px;
    gap: 8px;
  }

  .kpi__card--save {
    grid-column: 1 / -1;
    grid-row: 1;
    padding: 20px;
    gap: 10px;
  }

  .kpi__amount {
    font-size: 28px;
  }

  .kpi__card--save .kpi__amount {
    font-size: 36px;
  }

  .note {
    align-items: flex-start;
    padding: 16px;
    gap: 12px;
  }
}

@media (max-width: 420px) {
  .fuel-btn {
    padding: 0 18px;
  }

  .fuel-btn--ghost {
    padding: 0 16px;
  }
}