/* ===========================================================
   Eunice Yoga booking page (eunice.yoga/book)
   採用主站 Material Design tokens(在 app.js TAILWIND_CONFIG)
   =========================================================== */

/* HTML hidden 屬性必須勝過 .bk-* display: flex */
[hidden] { display: none !important; }

:root {
  --bk-bg: #fcf8f7;
  --bk-surface: #ffffff;
  --bk-surface-container: #f1edec;
  --bk-surface-low: #f7f3f2;
  --bk-on-surface: #1c1b1b;
  --bk-on-surface-variant: #454742;
  --bk-outline: #767872;
  --bk-outline-variant: #c6c7c0;
  --bk-primary: #5e5e5c;
  --bk-on-primary: #ffffff;
  --bk-tertiary: #536257;
  --bk-error: #ba1a1a;
  --bk-amber: #8c5b0f;
  --bk-amber-bg: #fcf1dc;
  --bk-tertiary-bg: #e5f4ee;
  --bk-error-bg: #fce0e0;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--bk-bg);
  color: var(--bk-on-surface);
  font-family: 'Manrope', 'Noto Sans TC', -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.bk-display { font-family: 'Noto Serif TC', serif; }

/* ── header ─────────────────────────────────────────────── */
.bk-header {
  position: sticky; top: 0; z-index: 10;
  background: var(--bk-bg);
  border-bottom: 1px solid var(--bk-outline-variant);
  padding: 14px 16px;
}
.bk-back {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--bk-on-surface-variant); text-decoration: none;
  font-size: 13px; letter-spacing: 0.06em;
}
.bk-back:hover { color: var(--bk-on-surface); }

.bk-main {
  max-width: 720px; margin: 0 auto; padding: 28px 20px 80px;
}
.bk-intro h1 {
  font-family: 'Noto Serif TC', serif;
  font-size: clamp(28px, 5vw, 36px);
  font-weight: 400; letter-spacing: 0.02em;
  margin: 16px 0 8px;
  color: var(--bk-on-surface);
}
.bk-intro p {
  color: var(--bk-on-surface-variant);
  font-size: 14px; line-height: 1.7;
  margin: 0 0 32px;
}

.bk-footer {
  text-align: center; color: var(--bk-outline);
  font-size: 12px; padding: 32px 20px;
  border-top: 1px solid var(--bk-outline-variant);
}
.bk-footer a { color: var(--bk-tertiary); text-decoration: none; }

/* ── steps ──────────────────────────────────────────────── */
.bk-step {
  background: var(--bk-surface);
  border: 1px solid var(--bk-outline-variant);
  border-radius: 6px;
  padding: 28px 24px;
  margin: 0 0 20px;
  animation: bk-fade-in 320ms ease-out;
}
@keyframes bk-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}

.bk-step-head {
  display: flex; align-items: center; gap: 14px;
  margin: 0 0 20px;
}
.bk-step-num {
  font-family: 'Manrope', sans-serif;
  font-size: 12px; letter-spacing: 0.2em; font-weight: 600;
  color: var(--bk-tertiary);
  background: var(--bk-surface-container);
  padding: 4px 10px; border-radius: 999px;
}
.bk-step-head h2 {
  font-family: 'Noto Serif TC', serif;
  font-size: 18px; font-weight: 500; letter-spacing: 0.04em;
  margin: 0; flex: 1; color: var(--bk-on-surface);
}
.bk-edit {
  background: transparent; border: none;
  color: var(--bk-outline); font-size: 12px; letter-spacing: 0.04em;
  cursor: pointer; padding: 4px 8px;
}
.bk-edit:hover { color: var(--bk-on-surface); }

.bk-help {
  font-size: 12px; color: var(--bk-outline);
  margin: 16px 0 0; text-align: center;
}

/* ── Step 1: 課程類型卡 ─────────────────────────────────── */
.bk-classes-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
@media (max-width: 480px) { .bk-classes-grid { grid-template-columns: 1fr; } }

.bk-class-card {
  background: var(--bk-bg);
  border: 1px solid var(--bk-outline-variant);
  border-radius: 4px;
  padding: 12px 14px; cursor: pointer;
  transition: all 160ms ease-out;
  text-align: left;
  display: flex; align-items: center; gap: 10px;
}
.bk-class-card:hover {
  border-color: var(--bk-on-surface);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,.04);
}
.bk-class-card.is-selected {
  border-color: var(--bk-on-surface);
  background: var(--bk-surface-container);
}
.bk-class-info { flex: 1; min-width: 0; }
.bk-class-aside {
  text-align: right; flex-shrink: 0;
  display: flex; flex-direction: column; gap: 2px;
}
.bk-class-tag {
  font-family: 'Manrope', sans-serif;
  font-size: 10.5px; letter-spacing: 0.14em;
  color: var(--bk-outline); text-transform: uppercase;
}
.bk-class-name {
  font-family: 'Noto Serif TC', serif;
  font-size: 16px; font-weight: 500; letter-spacing: 0.04em;
  color: var(--bk-on-surface); margin: 2px 0 0;
  line-height: 1.3;
}
.bk-class-meta { font-size: 11px; color: var(--bk-on-surface-variant); }
.bk-class-price {
  font-size: 13px; color: var(--bk-on-surface);
  font-weight: 600;
  font-family: 'Manrope', sans-serif;
}

/* ── Step 2: 日期 ──────────────────────────────────────── */
.bk-dates-list { display: flex; flex-direction: column; gap: 8px; }
.bk-date-row {
  display: flex; align-items: center; gap: 16px;
  background: var(--bk-bg);
  border: 1px solid var(--bk-outline-variant);
  border-radius: 4px;
  padding: 12px 16px; cursor: pointer;
  transition: all 160ms ease-out;
  text-align: left;
}
.bk-date-row:hover {
  border-color: var(--bk-on-surface);
  background: var(--bk-surface);
}
.bk-date-row.is-selected {
  border-color: var(--bk-on-surface);
  background: var(--bk-surface-container);
}
.bk-date-day {
  font-family: 'Manrope', sans-serif;
  font-size: 18px; font-weight: 500;
  color: var(--bk-on-surface); min-width: 64px;
}
.bk-date-day .bk-date-week {
  display: block; font-size: 11px;
  color: var(--bk-outline); margin-top: 2px;
}
.bk-date-times { flex: 1; font-size: 13px; color: var(--bk-on-surface-variant); }
.bk-date-times .bk-time-pill {
  display: inline-block; padding: 1px 7px; margin: 2px;
  background: var(--bk-surface);
  border: 1px solid var(--bk-outline-variant);
  border-radius: 4px; font-size: 11px;
}
.bk-date-times .is-full {
  text-decoration: line-through;
  color: var(--bk-outline-variant);
}

/* ── Step 3: 時段 ──────────────────────────────────────── */
.bk-slots-list { display: flex; flex-direction: column; gap: 8px; }
.bk-slot-row {
  display: grid; grid-template-columns: auto 1fr auto auto;
  gap: 12px; align-items: center;
  background: var(--bk-bg);
  border: 1px solid var(--bk-outline-variant);
  border-radius: 4px;
  padding: 14px 16px; cursor: pointer;
  transition: all 160ms ease-out;
  text-align: left;
}
.bk-slot-row:hover:not(.is-disabled) {
  border-color: var(--bk-on-surface);
  background: var(--bk-surface);
}
.bk-slot-row.is-selected {
  border-color: var(--bk-on-surface);
  background: var(--bk-surface-container);
}
.bk-slot-row.is-disabled { cursor: not-allowed; opacity: 0.55; }
.bk-slot-time {
  font-family: 'Manrope', sans-serif;
  font-size: 16px; color: var(--bk-on-surface);
}
.bk-slot-name { font-size: 13px; color: var(--bk-on-surface-variant); }
.bk-slot-teacher { font-size: 12px; color: var(--bk-outline); }
.bk-slot-avail {
  font-size: 11px; padding: 2px 8px;
  border-radius: 999px; white-space: nowrap;
  font-weight: 600;
}
.bk-slot-avail.green { background: var(--bk-tertiary-bg); color: var(--bk-tertiary); }
.bk-slot-avail.amber { background: var(--bk-amber-bg); color: var(--bk-amber); }
.bk-slot-avail.red   { background: var(--bk-error-bg);   color: var(--bk-error); }

/* ── form fields ─────────────────────────────────────── */
.bk-form { display: flex; flex-direction: column; gap: 0; }
.bk-grid-2 {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 14px 12px;
}
@media (max-width: 540px) { .bk-grid-2 { grid-template-columns: 1fr; } }

.bk-form label {
  display: block; font-size: 13px; color: var(--bk-on-surface-variant);
  letter-spacing: 0.02em;
}
.bk-required { color: var(--bk-error); }
.bk-multi-notice {
  margin: 0 0 16px; padding: 9px 13px;
  font-size: 13px; font-weight: 600;
  color: var(--bk-error);
  background: var(--bk-error-bg);
  border-radius: 6px;
}

.bk-form input[type=text],
.bk-form input[type=tel],
.bk-form input[type=email],
.bk-form select,
.bk-form textarea {
  width: 100%; box-sizing: border-box;
  margin-top: 6px;
  padding: 11px 12px; font-size: 14px; font-family: inherit;
  background: var(--bk-bg);
  border: 1px solid var(--bk-outline-variant);
  border-radius: 4px;
  color: var(--bk-on-surface);
  transition: border-color 120ms;
}
.bk-form input:focus, .bk-form select:focus, .bk-form textarea:focus {
  outline: none;
  border-color: var(--bk-on-surface);
  background: var(--bk-surface);
}
.bk-form textarea { resize: vertical; min-height: 80px; }

.bk-fieldset { border: none; padding: 0; margin: 16px 0 0; }
.bk-fieldset legend {
  font-size: 13px; color: var(--bk-on-surface-variant); margin-bottom: 8px;
}
.bk-checkrow, .bk-radiorow {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.bk-check, .bk-radio {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 12px;
  background: var(--bk-bg);
  border: 1px solid var(--bk-outline-variant);
  border-radius: 999px;
  font-size: 13px; color: var(--bk-on-surface);
  cursor: pointer; transition: all 120ms;
}
.bk-check:has(input:checked), .bk-radio:has(input:checked) {
  background: var(--bk-surface-container);
  border-color: var(--bk-on-surface);
}
.bk-check input, .bk-radio input { accent-color: var(--bk-on-surface); }

.bk-other-input { margin-top: 8px; }
.bk-transfer-block {
  margin-top: 8px; padding: 12px;
  background: var(--bk-surface-low);
  border-radius: 4px;
}
.bk-transfer-note {
  font-size: 12px; color: var(--bk-on-surface-variant); margin: 0 0 8px;
  font-family: 'Manrope', sans-serif;
}

.bk-line-qr {
  margin-top: 12px; text-align: center;
  padding: 16px; background: var(--bk-surface-low);
  border-radius: 6px;
}
.bk-line-qr img {
  width: 180px; height: 180px;
  border-radius: 4px;
  background: #fff; padding: 8px;
}
.bk-line-qr p { font-size: 12px; color: var(--bk-on-surface-variant); margin: 12px 0; }

/* ── summary + submit ─────────────────────────────────── */
.bk-summary {
  background: var(--bk-surface-container);
  border-radius: 6px;
  padding: 16px;
  margin: 20px 0;
  font-size: 13px; color: var(--bk-on-surface);
}
.bk-summary h3 {
  font-size: 12px; color: var(--bk-outline); letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0 0 8px;
}
.bk-summary dl { margin: 0; }
.bk-summary dt {
  display: inline-block; min-width: 5em; color: var(--bk-outline);
  font-size: 12px;
}
.bk-summary dd { display: inline; margin: 0; }
.bk-summary dd::after { content: '\A'; white-space: pre; }

.bk-inline-error {
  background: var(--bk-error-bg);
  color: var(--bk-error);
  border: 1px solid #f2bfbf;
  border-radius: 6px;
  padding: 12px 16px;
  margin: 12px 0 0;
  font-size: 14px; line-height: 1.6;
  animation: bk-fade-in 240ms ease-out;
}
.bk-inline-error button {
  color: var(--bk-tertiary);
  background: transparent; border: none; padding: 0;
  font: inherit; text-decoration: underline; cursor: pointer;
  margin-left: 4px;
}

/* 送出前的「需要加 LINE 才完成」警示 — 比舊 .bk-submit-help 醒目 */
.bk-submit-notice {
  text-align: center;
  background: #FCF5E2;
  border: 1px solid #F8E6B8;
  border-radius: 6px;
  padding: 16px 20px;
  margin: 20px 0 16px;
  animation: bk-fade-in 240ms ease-out;
}
.bk-submit-notice-icon {
  font-size: 22px; line-height: 1;
  display: inline-block; margin-right: 4px; vertical-align: -2px;
}
.bk-submit-notice p {
  margin: 0; font-size: 15px; line-height: 1.7;
  color: var(--bk-on-surface);
}
.bk-submit-notice strong {
  color: #C93668;
  font-weight: 600;
}

.bk-submit-row { text-align: center; margin: 8px 0 0; }
.bk-submit {
  background: var(--bk-on-surface);
  color: var(--bk-on-primary);
  border: none;
  padding: 14px 48px;
  font-size: 15px; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase;
  border-radius: 4px;
  cursor: pointer; transition: opacity 120ms;
  font-family: 'Manrope', sans-serif;
}
.bk-submit:hover { opacity: 0.9; }
.bk-submit-help {
  font-size: 12px; color: var(--bk-outline); margin: 12px 0 0;
}

/* ── overlay ─────────────────────────────────────────── */
.bk-overlay {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(252,248,247,0.85);
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(4px);
}
.bk-overlay-card {
  background: var(--bk-surface);
  border: 1px solid var(--bk-outline-variant);
  border-radius: 6px;
  padding: 28px 36px; min-width: 240px; text-align: center;
  box-shadow: 0 12px 32px rgba(0,0,0,.08);
}
.bk-spinner {
  width: 28px; height: 28px; margin: 0 auto 12px;
  border: 3px solid var(--bk-outline-variant);
  border-top-color: var(--bk-on-surface);
  border-radius: 50%;
  animation: bk-spin 800ms linear infinite;
}
@keyframes bk-spin { to { transform: rotate(360deg); } }
.bk-overlay-card p { font-size: 13px; color: var(--bk-on-surface-variant); margin: 0; }

/* ── success / fallback screen ───────────────────────── */
.bk-success-card {
  background: var(--bk-surface);
  border: 1px solid var(--bk-outline-variant);
  border-radius: 6px;
  padding: 40px 28px; text-align: center;
  animation: bk-fade-in 320ms ease-out;
}
.bk-success-icon {
  width: 56px; height: 56px;
  margin: 0 auto 16px;
  background: var(--bk-on-surface);
  color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
}
.bk-success-card h2 {
  font-family: 'Noto Serif TC', serif;
  font-size: 22px; font-weight: 500;
  margin: 0 0 8px; color: var(--bk-on-surface);
}
.bk-success-card > p { color: var(--bk-on-surface-variant); font-size: 14px; line-height: 1.6; }
.bk-success-action {
  margin: 28px auto 0; max-width: 320px;
  padding: 24px; background: var(--bk-surface-low);
  border-radius: 6px;
}
.bk-success-action h3 {
  font-size: 14px; color: var(--bk-on-surface); margin: 0 0 12px;
}
.bk-success-action img {
  width: 200px; height: 200px;
  background: #fff; padding: 8px;
  border-radius: 4px;
  margin-bottom: 12px;
}
.bk-success-action p { font-size: 12.5px; color: var(--bk-on-surface-variant); line-height: 1.6; margin: 0 0 14px; }
.bk-success-action a.btn {
  display: inline-block;
  background: var(--bk-on-surface);
  color: var(--bk-on-primary);
  padding: 12px 28px;
  text-decoration: none;
  border-radius: 4px;
  font-size: 14px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
}
.bk-success-tip {
  margin: 24px auto 0; max-width: 480px;
  padding: 12px 16px;
  background: var(--bk-surface-container);
  border-radius: 6px;
  font-size: 13px; color: var(--bk-on-surface-variant);
}