/* =========================================================
   styles.css
   - 這份 CSS 主要負責整個網站的版面、顏色、排版
   - 讓所有頁面共用同一份樣式（這也是「建立網站」常見做法）
   ========================================================= */

/* ---------- 基本 Reset：減少瀏覽器預設樣式差異 ---------- */
* {
  box-sizing: border-box; /* 讓寬高包含 padding/border，版面比較好算 */
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans TC", Arial, sans-serif;
  line-height: 1.6;
  color: #1f2937;
  background: #eef2f7;
}

/* ---------- 容器：限制內容最大寬度 ---------- */
.container {
  width: min(1000px, calc(100% - 32px));
  margin: 0 auto;
}

/* ---------- 導航列（固定出現在每頁） ---------- */
.nav {
  background: #111827;
  color: #fff;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
}

.brand {
  font-weight: 800;
  letter-spacing: 0.3px;
}

/* nav links */
.nav a {
  color: #e5e7eb;
  text-decoration: none; /* 移除底線 */
}

.nav a:hover {
  text-decoration: underline;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* 目前頁面高亮（用 aria-current="page"） */
.nav a[aria-current="page"] {
  background: #2563eb;
  color: white;
  padding: 6px 10px;
  border-radius: 8px;
  text-decoration: none;
}

/* ---------- 主內容卡片 ---------- */
.card {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  padding: 18px;
  margin: 18px 0;
  box-shadow: 0 8px 24px rgba(17, 24, 39, 0.06);
}

/* ---------- 通用按鈕 ---------- */
.btn {
  appearance: none;
  border: 1px solid #1f2937;
  background: #111827;
  color: #fff;
  border-radius: 10px;
  padding: 10px 12px;
  cursor: pointer;
  font-weight: 700;
}

.btn:hover {
  filter: brightness(1.08);
}

.btn.secondary {
  background: #fff;
  color: #111827;
}

/* ---------- 產品列表 ---------- */
.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 720px) {
  .grid {
    grid-template-columns: 1fr 1fr;
  }
}

.product {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 12px;
  align-items: center;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 12px;
  background: #fafafa;
}

.thumb {
  width: 84px;
  height: 84px;
  border: 2px dashed #9ca3af; /* slides 提示：用邊框標示圖片位置 */
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: #6b7280;
  font-size: 12px;
  text-align: center;
  padding: 6px;
}

.product h3 {
  margin: 0 0 4px 0;
  font-size: 18px;
}

.product .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: #4b5563;
  font-size: 14px;
}

/* 讓整個產品卡片可以點（用 button/ a 都可以） */
.product-action {
  display: flex;
  gap: 10px;
  margin-top: 10px;
  flex-wrap: wrap;
}

/* ---------- 表單 ---------- */
.field {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
}

label {
  font-weight: 700;
}

input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  font-size: 16px;
}

.helper {
  color: #6b7280;
  font-size: 14px;
}

/* ---------- 訊息提示 ---------- */
.notice {
  padding: 12px;
  border-radius: 12px;
  border: 1px solid #fde68a;
  background: #fffbeb;
  color: #92400e;
}

.error {
  padding: 12px;
  border-radius: 12px;
  border: 1px solid #fecaca;
  background: #fef2f2;
  color: #991b1b;
}

/* ---------- 商品細節頁 ---------- */
.detail {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 820px) {
  .detail {
    grid-template-columns: 220px 1fr;
    align-items: start;
  }
}

.price {
  font-size: 22px;
  font-weight: 900;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  background: #0b1020;
  color: #c7d2fe;
  padding: 10px;
  border-radius: 12px;
  overflow: auto;
}