/* ============================================================
   James Coffee — 職人帳本 (Roaster's Ledger)
   牛皮紙 × 泛黃紙卡 × 手寫筆觸 × 郵戳標籤
   像翻舊的烘豆手記帳本:有摺痕、有膠帶、有繩線
   ============================================================ */

:root {
  --ink:        #38291a;   /* 墨水深褐(主文字) */
  --ink-soft:   #6f5a44;   /* 淡墨(次要) */
  --kraft:      #c9a36b;   /* 牛皮紙 */
  --kraft-dk:   #a07d4d;   /* 深牛皮 */
  --manila:     #e8d6b3;   /* 馬尼拉卡紙(標籤) */
  --paper:      #f3e7cf;   /* 泛黃紙(卡片) */
  --paper-lt:   #faf2df;   /* 亮紙(輸入框) */
  --bg:         #d8c19a;   /* 桌面牛皮底 */
  --thread:     #7a5a36;   /* 繩線 / 縫線 */
  --stamp:      #9c3b2e;   /* 郵戳磚紅 */
  --stamp-blue: #355a6e;   /* 藍墨印章 */
  --green:      #5b7a3a;   /* 生豆綠 */
  --line:       #cbb588;   /* 分隔/邊框 */

  --shadow-card: 0 1px 0 rgba(255,255,255,.4) inset,
                 0 2px 4px rgba(56,41,26,.12),
                 0 14px 30px rgba(56,41,26,.16);
  --radius: 4px;

  /* 字體規則(統一,勿混用):
     --font-hand  → 所有大標題、品牌名、空狀態(行楷,有筆觸又好認)
     --font-disp  → 小標題、標籤、表頭(襯線)
     --font-body  → 內文、輸入、數字(黑體) */
  --font-hand:  "Ma Shan Zheng", "Noto Serif TC", cursive;
  --font-disp:  "Noto Serif TC", serif;
  --font-body:  "Noto Sans TC", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  line-height: 1.65;
  min-height: 100vh;
  /* 桌面:牛皮紙底 + 細纖維紋理 + 邊角暗角 */
  background-color: var(--bg);
  background-image:
    radial-gradient(140% 120% at 50% 0%, rgba(255,248,230,.35), transparent 55%),
    radial-gradient(100% 100% at 50% 120%, rgba(56,41,26,.22), transparent 60%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='f'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23f)' opacity='0.06'/%3E%3C/svg%3E");
  background-attachment: fixed;
}

/* ---- 標題:手寫毛筆 ---- */
h1, h2 {
  font-family: var(--font-hand);
  font-weight: 400;
  color: var(--ink);
  line-height: 1.1;
  margin: 0 0 1.25rem;
}
h1 {
  font-size: clamp(2.5rem, 7vw, 3.6rem);
  position: relative;
  display: inline-block;
  padding: 0 .12em .18em;
  letter-spacing: .04em;
}
/* 標題下手繪墨線 */
h1::after {
  content: "";
  position: absolute; left: 0; right: -.05em; bottom: .02em;
  height: 5px;
  background: var(--ink);
  border-radius: 50% 50% 50% 50% / 100% 100% 80% 80%;
  opacity: .78;
}
.form-heading {
  font-family: var(--font-disp);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--kraft-dk);
  margin: 0;
  letter-spacing: .04em;
}

/* ============================================================
   導覽列 — 像貼在帳本上緣的牛皮紙條 + 標籤
   ============================================================ */
.topnav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
  padding: .9rem 1.4rem;
  background:
    linear-gradient(180deg, var(--kraft), var(--kraft-dk));
  border-bottom: 3px solid var(--thread);
  box-shadow: 0 4px 14px rgba(56,41,26,.25);
  position: sticky; top: 0; z-index: 50;
}
.topnav::before {
  /* 牛皮紙條的縫線 */
  content: "";
  position: absolute; left: 0; right: 0; bottom: 3px; height: 0;
  border-bottom: 2px dashed rgba(56,41,26,.25);
  margin-bottom: 2px;
}
.topnav .brand {
  font-family: var(--font-hand);
  font-size: 1.9rem;
  color: #fff;
  text-shadow: 0 1px 0 rgba(56,41,26,.5);
  margin-right: auto;
  display: flex; align-items: center; gap: .55rem;
  letter-spacing: .03em;
}
.topnav .brand::before {
  content: "";
  width: 20px; height: 25px;
  background: var(--paper);
  border-radius: 50% 50% 48% 48% / 62% 62% 38% 38%;
  box-shadow: inset 0 -2px 0 rgba(56,41,26,.25);
  position: relative;
  transform: rotate(-10deg);
}
/* 導覽連結 = 牛皮紙標籤 */
.topnav a {
  color: var(--ink);
  text-decoration: none;
  padding: .35rem .85rem;
  font-size: .92rem;
  font-weight: 600;
  background: var(--manila);
  border: 1px solid rgba(56,41,26,.25);
  border-radius: 3px;
  box-shadow: 0 1px 2px rgba(56,41,26,.2);
  transition: transform .15s, background .15s;
}
.topnav a:hover { transform: translateY(-2px) rotate(-1deg); background: var(--paper-lt); }
.topnav a.active {
  background: var(--stamp);
  color: #fff;
  border-color: rgba(56,41,26,.4);
  transform: rotate(-1.5deg);
}

/* ============================================================
   主容器
   ============================================================ */
main {
  max-width: 920px;
  margin: 2rem auto;
  padding: 0 1.25rem 4rem;
  animation: rise .5s ease both;
}
@keyframes rise { from { opacity:0; transform: translateY(12px);} to {opacity:1; transform:none;} }

/* ============================================================
   卡片 / 表單 = 釘在帳本上的泛黃紙卡(含膠帶)
   ============================================================ */
.field-form, .auth-form, .card {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 2rem 1.75rem;
}
/* 紙卡上緣的「膠帶」 */
.field-form::before, .auth-form::before {
  content: "";
  position: absolute; top: -12px; left: 50%;
  width: 120px; height: 26px;
  transform: translateX(-50%) rotate(-2deg);
  background: rgba(201,163,107,.55);
  border: 1px dashed rgba(56,41,26,.25);
  box-shadow: 0 2px 4px rgba(56,41,26,.15);
}

.field-form, .auth-form {
  display: flex; flex-direction: column; gap: 1.15rem;
}
.field-form label, .auth-form label {
  display: flex; flex-direction: column; gap: .35rem;
  font-size: .82rem; font-weight: 700;
  color: var(--ink-soft);
  letter-spacing: .04em;
}

input, select {
  font-family: var(--font-body);
  font-size: 1rem; color: var(--ink);
  padding: .7rem .85rem;
  border: 1px solid var(--line);
  border-bottom: 2px solid var(--kraft-dk);
  border-radius: 3px;
  background: var(--paper-lt);
  width: 100%;
  transition: border-color .2s, box-shadow .2s, background .2s;
}
input:focus, select:focus {
  outline: none;
  border-color: var(--stamp);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(156,59,46,.12);
}
input::placeholder { color: #b39d78; }

/* 按鈕 = 蓋下去的橡皮印章 */
button {
  font-family: var(--font-disp);
  font-size: 1.05rem; font-weight: 700;
  letter-spacing: .12em;
  padding: .8rem 1.2rem;
  border: 2px solid var(--ink);
  border-radius: 4px;
  background: var(--stamp);
  color: #fff;
  cursor: pointer;
  box-shadow: 0 2px 0 rgba(56,41,26,.5), 0 4px 10px rgba(56,41,26,.2);
  transition: transform .1s, box-shadow .1s, filter .2s;
  text-shadow: 0 1px 0 rgba(56,41,26,.35);
}
button:hover { filter: brightness(1.05); }
button:active { transform: translateY(2px); box-shadow: 0 0 0 rgba(0,0,0,0); }

/* 訊息 */
.error { color: var(--stamp); font-weight: 700; margin: 0; }
.success {
  color: var(--green); font-weight: 700; margin: 0 0 1rem;
  padding: .7rem 1rem 0.7rem 2.4rem;
  background: rgba(91,122,58,.12);
  border: 1px dashed rgba(91,122,58,.5);
  border-radius: 3px;
  position: relative;
}
.success::before {
  content: "✓"; position: absolute; left: .8rem; top: 50%;
  transform: translateY(-50%);
  width: 1.1rem; height: 1.1rem; line-height: 1.1rem; text-align: center;
  border: 2px solid var(--green); border-radius: 50%; font-size: .7rem;
}

/* ============================================================
   AI 入口 = 兩張藍墨印章卡
   ============================================================ */
.ai-buttons { display: flex; gap: 1rem; margin-bottom: 1.6rem; }
.ai-buttons button {
  flex: 1; padding: 1.1rem .5rem; font-size: 1.05rem;
  background: var(--stamp-blue);
  border-color: var(--ink);
  display: flex; align-items: center; justify-content: center; gap: .5rem;
}
.ai-buttons.ai-single { justify-content: flex-start; }
.ai-buttons.ai-single button { flex: 0 0 auto; padding: .7rem 1.4rem; }

/* 分隔線 = 縫線 + 手寫字 */
.divider {
  display: flex; align-items: center; gap: 1rem;
  margin: 0 0 1.6rem;
  font-family: var(--font-hand);
  font-size: 1.6rem; color: var(--kraft-dk);
}
.divider::before, .divider::after {
  content: ""; flex: 1; height: 0;
  border-top: 2px dashed var(--line);
}

/* ============================================================
   淨額庫存 = 帳本明細表(泛黃、表頭蓋印、橫線帳格)
   ============================================================ */
.table-scroll { position: relative; }
.stock-table {
  width: 100%;
  border-collapse: separate; border-spacing: 0;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.stock-table th {
  text-align: left;
  font-family: var(--font-disp);
  font-size: .8rem; font-weight: 700; letter-spacing: .08em;
  color: #fff;
  background: var(--kraft-dk);
  padding: .9rem 1rem;
  border-bottom: 2px solid var(--thread);
}
.stock-table td {
  padding: .85rem 1rem;
  border-bottom: 1px dashed var(--line);
  font-size: .95rem;
}
.stock-table tbody tr:last-child td { border-bottom: none; }
.stock-table tbody tr:nth-child(even) td { background: rgba(201,163,107,.10); }
.stock-table tbody tr:hover td { background: rgba(156,59,46,.08); }
.stock-table td:nth-child(3),
.stock-table td:nth-child(4),
.stock-table td:nth-child(5) {
  font-variant-numeric: tabular-nums; font-weight: 700;
}
/* 產品編號 = 標籤樣式 */
.stock-table td:first-child {
  font-family: var(--font-disp); color: var(--kraft-dk); font-weight: 700;
}
.warn { color: var(--stamp); font-weight: 800; }
.warn::before { content: "⚠ "; }

/* 空狀態 */
.empty-state {
  background: var(--paper);
  border: 2px dashed var(--line);
  border-radius: var(--radius);
  padding: 3rem 1.5rem; text-align: center;
  color: var(--ink-soft);
  font-family: var(--font-hand); font-size: 1.4rem;
}

/* ============================================================
   登入頁 = 桌上一張蓋章的入場卡
   ============================================================ */
.auth-wrap {
  min-height: 80vh;
  display: flex; align-items: center; justify-content: center;
  padding: 2rem 0;
}
.auth-form {
  width: 100%; max-width: 380px;
  padding: 2.5rem 2rem;
  transform: rotate(-.4deg);
}
.auth-form h1 { display: block; text-align: center; width: 100%; }
.auth-form h1::after { left: 12%; right: 12%; }
.auth-tagline {
  text-align: center;
  font-family: var(--font-disp);
  color: var(--ink-soft); font-size: .92rem;
  letter-spacing: .15em;
  margin: .25rem 0 1rem;
}
/* 登入卡右上角的郵戳 */
.auth-form::after {
  content: "ROASTERY";
  position: absolute; top: 14px; right: -6px;
  font-family: var(--font-disp); font-size: .62rem; font-weight: 700;
  letter-spacing: .15em; color: var(--stamp);
  border: 2px solid var(--stamp); border-radius: 4px;
  padding: .25rem .5rem;
  transform: rotate(8deg); opacity: .7;
}

/* 信心度低 = 鉛筆圈起的待確認 */
.confidence-low {
  background: rgba(255, 235, 160, .5) !important;
  border-color: var(--stamp) !important;
  box-shadow: 0 0 0 2px rgba(156,59,46,.15) !important;
}

/* ============================================================
   響應式
   ============================================================ */
@media (min-width: 720px) {
  .field-form { display: grid; grid-template-columns: 1fr 1fr; gap: 1.15rem 1.4rem; }
  .field-form > button[type="submit"],
  .field-form label.full,
  .field-form .form-heading { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  .topnav { padding: .75rem .9rem; }
  .topnav .brand { width: 100%; margin-bottom: .5rem; font-size: 1.5rem; }
  .topnav a { padding: .3rem .65rem; font-size: .85rem; }
  main { margin: 1.25rem auto; padding: 0 .9rem 3rem; }
  .field-form, .auth-form { padding: 1.75rem 1.25rem; }
  .ai-buttons button { padding: 1.2rem .4rem; }
  h1 { font-size: 2.3rem; }
  .table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .stock-table { min-width: 480px; }
}