/* ================================
   Global Base (Common for all pages)
   ================================ */

/* Design Tokens */
:root { 
  --brand: #111827;   /* Headings */
  --accent: #000000;  /* Emphasis / Active */
  --text: #555555;    /* Body text */
  --muted: #888888;   /* Secondary text */
}

/* Typography */
body { 
  margin: 0;
  color: var(--text);
  font-size: 1rem;       /* 16px */
  line-height: 1.6;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}

h1, h2, h3 {
  color: var(--brand);
  margin: 0 0 0.8rem;
}
h1 { font-size: 2rem;   font-weight: 700; }   /* 32px */
h2 { font-size: 1.5rem; font-weight: 700; }   /* 24px */
h3 { font-size: 1.25rem; font-weight: 600; }  /* 20px */

/* Container: unify width + align with Bootstrap gutter */
.container {
  width: 100%;
  max-width: 1120px;  /* 全站統一內容寬度 */
  margin-left: auto;
  margin-right: auto;
  /* 與 Bootstrap 的 row/gutter 對齊，避免小螢幕貼邊 */
  padding-left: calc(var(--bs-gutter-x, 1.5rem) * .5);
  padding-right: calc(var(--bs-gutter-x, 1.5rem) * .5);
}

/* Links (default) */
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }

/* ================================
   Navbar (Common)
   ================================ */

.navbar {
  background: #ffffffcc;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-bottom: none;
}

.nav-link {
  color: var(--text) !important;
  text-decoration: none !important;
}
.nav-link:hover {
  color: var(--accent) !important;
  text-decoration: none !important;
}
.nav-link.active {
  color: var(--accent) !important;
  font-weight: 600;
  text-decoration: none !important;
}

/* ================================
   Footer (Common)
   ================================ */

.footer { 
  padding: 24px 0; 
  color: var(--muted); 
  text-align: center; 
  font-size: 0.875rem;  /* 14px */
  background: #fff;
  border-top: none;
}

/* ================================
   Utilities (small, safe set)
   ================================ */

.text-center { text-align: center; }
.mb-0 { margin-bottom: 0 !important; }
.mb-2 { margin-bottom: .5rem !important; }
.mb-3 { margin-bottom: 1rem !important; }
.mb-4 { margin-bottom: 1.5rem !important; }
.py-5 { padding-top: 3rem !important; padding-bottom: 3rem !important; }

/* （各分頁專用樣式請放到各自 HTML 的 <style> 內） */