/* ============================================================
   留白咖啡 KUHAKU COFFEE — 纸感留白禅意设计系统
   参考 18 Kenya Hara「空的设计」：
   - 80%+ 留白，白不是背景而是材料本身
   - 纸张颗粒质感（极轻噪点），暖白 / 冷白 / 米白分层
   - 墨色文字，单一低饱和焙褐点缀
   - 无阴影、无渐变、无霓虹；以留白与字重层级组织信息
   ============================================================ */

:root {
  /* 纸的层次 */
  --paper:        #f7f4ee;  /* 主纸面：暖米白 */
  --paper-soft:   #f2eee6;  /* 次级纸面：更深半度 */
  --paper-card:   #fbf9f4;  /* 卡片纸面：更亮半度 */
  --paper-edge:   #e5dfd3;  /* 纸的折痕 / 分隔线 */

  /* 墨 */
  --ink:          #2b2723;  /* 正文墨色 */
  --ink-soft:     #6f675c;  /* 次级文字 */
  --ink-faint:    #a89f92;  /* 极浅注释 */

  /* 唯一强调色：焙褐（低饱和，像浅烘豆壳） */
  --accent:       #8a6f56;
  --accent-ink:   #6d5741;

  --maxw: 1080px;
  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.9;
  font-size: 16px;
  min-height: 100vh;
  position: relative;
}

/* 纸张颗粒：极轻噪点，几乎不可察觉但让白不再是“死白” */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='linear' slope='0.045'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  z-index: 0;
}

main, header.site, footer.site { position: relative; z-index: 1; }

/* ---------- 排版 ---------- */
h1, h2, h3 { font-family: var(--font-serif); font-weight: 600; }

.overline {
  font-size: 12px;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 1.4em;
}

.lead {
  color: var(--ink-soft);
  max-width: 34em;
}

a { color: inherit; text-decoration: none; }

hr.rule {
  border: none;
  border-top: 1px solid var(--paper-edge);
  margin: 0;
}

/* ---------- 布局 ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

main.wrap { padding-top: 96px; padding-bottom: 140px; }

.section { padding-top: 96px; }
.section:first-child { padding-top: 0; }

/* ---------- 页头 ---------- */
header.site {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(247, 244, 238, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--paper-edge);
}

header.site .wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-top: 22px;
  padding-bottom: 22px;
}

.brand { display: flex; align-items: baseline; gap: 14px; }
.brand .name { font-family: var(--font-serif); font-size: 20px; font-weight: 600; letter-spacing: 0.14em; }
.brand .en { font-size: 11px; letter-spacing: 0.3em; color: var(--ink-faint); }

nav.main { display: flex; gap: 34px; }
nav.main a {
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.25s ease, border-color 0.25s ease;
}
nav.main a:hover { color: var(--ink); }
nav.main a[aria-current="page"] { color: var(--accent-ink); border-bottom-color: var(--accent-ink); }

/* ---------- 页脚 ---------- */
footer.site {
  border-top: 1px solid var(--paper-edge);
  padding: 56px 0 72px;
  color: var(--ink-faint);
  font-size: 13px;
  letter-spacing: 0.08em;
}
footer.site .wrap { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 13px 44px;
  border: 1px solid var(--ink);
  color: var(--ink);
  font-size: 14px;
  letter-spacing: 0.3em;
  text-indent: 0.3em; /* 让字距不导致文字偏左 */
  background: transparent;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: background 0.25s ease, color 0.25s ease;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn.primary { background: var(--ink); color: var(--paper); }
.btn.primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); }
.btn.small { padding: 9px 26px; font-size: 13px; }

/* ---------- 首页 ---------- */
.hero {
  min-height: 72vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero .cup {
  width: 132px;
  margin-bottom: 48px;
}

.hero h1 {
  font-size: clamp(38px, 6.5vw, 64px);
  letter-spacing: 0.1em;
  line-height: 1.4;
  margin-bottom: 0.4em;
}

.hero .sub {
  font-size: clamp(15px, 2vw, 18px);
  color: var(--ink-soft);
  letter-spacing: 0.32em;
  margin-bottom: 64px;
}

.hero .actions { display: flex; gap: 20px; flex-wrap: wrap; }

.home-teaser {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--paper-edge);
  border: 1px solid var(--paper-edge);
  margin-top: 120px;
}
.home-teaser a {
  background: var(--paper);
  padding: 44px 36px 48px;
  display: block;
  transition: background 0.3s ease;
}
.home-teaser a:hover { background: var(--paper-card); }
.home-teaser .k { font-size: 12px; letter-spacing: 0.4em; color: var(--ink-faint); margin-bottom: 18px; }
.home-teaser .t { font-family: var(--font-serif); font-size: 21px; margin-bottom: 10px; }
.home-teaser .d { font-size: 14px; color: var(--ink-soft); line-height: 1.8; }

/* ---------- 菜单 ---------- */
.menu-category { margin-bottom: 88px; }

.menu-category .cat-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: 40px;
}
.menu-category .cat-head h2 { font-size: 24px; letter-spacing: 0.12em; }
.menu-category .cat-head .note { font-size: 13px; color: var(--ink-faint); letter-spacing: 0.06em; }

.menu-item {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 17px 0;
}
.menu-item .name { font-size: 16.5px; letter-spacing: 0.06em; white-space: nowrap; }
.menu-item .dots {
  flex: 1;
  border-bottom: 1px dotted var(--paper-edge);
  transform: translateY(-4px);
}
.menu-item .desc { font-size: 13.5px; color: var(--ink-faint); letter-spacing: 0.04em; white-space: nowrap; }
.menu-item .price { font-variant-numeric: tabular-nums; font-size: 15px; color: var(--accent-ink); letter-spacing: 0.06em; white-space: nowrap; }

.menu-footnote {
  margin-top: 72px;
  padding-top: 32px;
  border-top: 1px solid var(--paper-edge);
  color: var(--ink-faint);
  font-size: 13.5px;
  letter-spacing: 0.05em;
  max-width: 40em;
}

/* ---------- 到店 ---------- */
.info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 72px 64px;
  margin-top: 72px;
}

.info-block .k {
  font-size: 12px;
  letter-spacing: 0.42em;
  color: var(--ink-faint);
  margin-bottom: 20px;
}
.info-block .v { font-family: var(--font-serif); font-size: 19px; line-height: 2; }
.info-block .v small { display: block; font-family: var(--font-sans); font-size: 14px; color: var(--ink-soft); margin-top: 8px; }

.map-box {
  margin-top: 88px;
  border: 1px solid var(--paper-edge);
  background: var(--paper-soft);
  padding: 56px 48px;
}
.map-box .hint { color: var(--ink-soft); max-width: 42em; }
.map-box .wayfinding { margin: 28px 0 0; padding: 0; list-style: none; }
.map-box .wayfinding li {
  padding: 14px 0 14px 34px;
  position: relative;
  color: var(--ink-soft);
  border-bottom: 1px dashed var(--paper-edge);
  font-size: 14.5px;
}
.map-box .wayfinding li:last-child { border-bottom: none; }
.map-box .wayfinding li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 24px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: 1px solid var(--accent);
}
.map-box .wayfinding li strong { color: var(--ink); font-weight: 500; }

/* ---------- 预约 ---------- */
.reserve-layout {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  gap: 88px;
  margin-top: 64px;
}

.res-form .field { margin-bottom: 36px; }

.res-form label {
  display: block;
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--ink-soft);
  margin-bottom: 12px;
}
.res-form label em { font-style: normal; color: var(--accent-ink); }

.res-form input,
.res-form select,
.res-form textarea {
  width: 100%;
  border: none;
  border-bottom: 1px solid var(--paper-edge);
  background: transparent;
  padding: 10px 2px 12px;
  font-size: 16px;
  font-family: var(--font-sans);
  color: var(--ink);
  border-radius: 0;
  transition: border-color 0.25s ease;
}
.res-form textarea { resize: vertical; min-height: 44px; line-height: 1.7; }
.res-form input:focus,
.res-form select:focus,
.res-form textarea:focus { outline: none; border-bottom-color: var(--accent-ink); }

.res-form input.invalid,
.res-form select.invalid { border-bottom-color: #b4543f; }

.field-error {
  display: none;
  font-size: 13px;
  color: #b4543f;
  margin-top: 8px;
  letter-spacing: 0.04em;
}
.field-error.show { display: block; }

.form-error {
  display: none;
  border: 1px solid #d8b7ae;
  background: #f8efec;
  color: #8c4634;
  font-size: 14px;
  padding: 14px 18px;
  margin-bottom: 32px;
  letter-spacing: 0.03em;
}
.form-error.show { display: block; }

.res-side { border-left: 1px solid var(--paper-edge); padding-left: 56px; }
.res-side .block { margin-bottom: 48px; }
.res-side .block h3 { font-size: 15px; letter-spacing: 0.24em; margin-bottom: 14px; }
.res-side .block p { font-size: 14px; color: var(--ink-soft); line-height: 2; }

/* 成功态 */
.success-panel { text-align: center; padding: 40px 0 20px; }
.success-panel .ring {
  width: 74px; height: 74px;
  margin: 0 auto 40px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.success-panel .ring svg { display: block; }
.success-panel h2 { font-size: 26px; letter-spacing: 0.14em; margin-bottom: 18px; }
.success-panel p { color: var(--ink-soft); font-size: 15px; }
.success-panel .ticket {
  margin: 44px auto 0;
  max-width: 420px;
  border: 1px solid var(--paper-edge);
  background: var(--paper-card);
  padding: 28px 32px;
  text-align: left;
}
.success-panel .ticket .row {
  display: flex; justify-content: space-between; gap: 20px;
  padding: 7px 0; font-size: 14.5px;
}
.success-panel .ticket .row .k { color: var(--ink-faint); letter-spacing: 0.1em; }
.success-panel .ticket .row .v { font-variant-numeric: tabular-nums; }
.success-panel .ticket .row .v.id { color: var(--accent-ink); letter-spacing: 0.08em; }
.success-panel .actions { margin-top: 44px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- 台账 ---------- */
.filters {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  margin: 56px 0 8px;
}
.filters label { font-size: 13px; letter-spacing: 0.2em; color: var(--ink-soft); }
.filters input, .filters select {
  border: 1px solid var(--paper-edge);
  background: var(--paper-card);
  padding: 9px 14px;
  font-size: 14px;
  font-family: var(--font-sans);
  color: var(--ink);
  border-radius: 0;
}
.filters input:focus, .filters select:focus { outline: none; border-color: var(--accent-ink); }
.filters .count { margin-left: auto; font-size: 13px; color: var(--ink-faint); letter-spacing: 0.08em; }

.ledger { margin-top: 28px; border-top: 1px solid var(--paper-edge); }

.ledger-row {
  display: grid;
  grid-template-columns: 132px 108px 118px 1fr 84px 112px;
  gap: 18px;
  align-items: baseline;
  padding: 17px 4px;
  border-bottom: 1px solid var(--paper-edge);
  font-size: 14.5px;
}
.ledger-row.head {
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--ink-faint);
  padding: 14px 4px;
}
.ledger-row .id { color: var(--accent-ink); letter-spacing: 0.05em; font-variant-numeric: tabular-nums; }
.ledger-row .date, .ledger-row .time { font-variant-numeric: tabular-nums; color: var(--ink); }
.ledger-row .name-col strong { font-weight: 500; }
.ledger-row .name-col .phone { display: block; font-size: 12.5px; color: var(--ink-faint); margin-top: 2px; font-variant-numeric: tabular-nums; }
.ledger-row .party { font-variant-numeric: tabular-nums; }
.ledger-row .status { font-size: 12.5px; letter-spacing: 0.14em; color: var(--accent-ink); }

.ledger-empty {
  padding: 96px 0;
  text-align: center;
  color: var(--ink-faint);
  letter-spacing: 0.14em;
  font-size: 15px;
}
.ledger-empty .en { display: block; font-size: 12px; letter-spacing: 0.4em; margin-top: 14px; color: #c4bbae; }

.ledger-note {
  margin-top: 36px;
  font-size: 13px;
  color: var(--ink-faint);
  letter-spacing: 0.05em;
  line-height: 2;
}

/* ---------- 响应式 ---------- */
@media (max-width: 880px) {
  .res-side { border-left: none; padding-left: 0; border-top: 1px solid var(--paper-edge); padding-top: 48px; }
  .reserve-layout { grid-template-columns: 1fr; gap: 56px; }
  .info-grid { grid-template-columns: 1fr; gap: 48px; }
  .ledger-row { grid-template-columns: 96px 92px 1fr 72px; }
  .ledger-row .time, .ledger-row .status { display: none; }
}

@media (max-width: 640px) {
  body { font-size: 15px; }
  header.site .wrap { flex-direction: column; align-items: flex-start; gap: 14px; padding-top: 18px; padding-bottom: 18px; }
  nav.main { gap: 22px; flex-wrap: wrap; }
  main.wrap { padding-top: 56px; padding-bottom: 96px; }
  .section { padding-top: 64px; }
  .hero { min-height: 58vh; }
  .hero .cup { width: 96px; margin-bottom: 32px; }
  .hero .sub { letter-spacing: 0.2em; margin-bottom: 44px; }
  .home-teaser { grid-template-columns: 1fr; margin-top: 72px; }
  .menu-item { flex-wrap: wrap; row-gap: 2px; }
  .menu-item .dots { display: none; }
  .menu-item .name { flex-basis: 70%; }
  .menu-item .price { flex-basis: 30%; text-align: right; }
  .menu-item .desc { flex-basis: 100%; white-space: normal; }
  .map-box { padding: 36px 24px; }
  .filters { align-items: stretch; flex-direction: column; }
  .filters .count { margin-left: 0; }
  .ledger-row { grid-template-columns: 1fr 72px; row-gap: 6px; }
  .ledger-row.head { display: none; }
  .ledger-row .date::after { content: "　" attr(data-time); color: var(--ink-faint); font-size: 12px; }
  .ledger-row .time { display: none; }
}