/* ============================================================
   再戰江湖 — 共用樣式 (水墨古籍風)
   ============================================================ */

:root {
  /* 宣紙色系 */
  --paper-0: #f6efdd;        /* 最淺宣紙 */
  --paper-1: #f0e6d0;        /* 主底色 */
  --paper-2: #e8dcc0;        /* 次層 */
  --paper-3: #d9c9a6;        /* 分隔/邊 */
  --paper-shadow: #b8a57e;   /* 紙紋陰影 */

  /* 墨色 */
  --ink-0: #120e0a;          /* 濃墨 */
  --ink-1: #2a211a;          /* 主墨 */
  --ink-2: #4a3f33;          /* 淡墨 */
  --ink-3: #6b5d4d;          /* 灰墨 */
  --ink-4: #8a7a66;          /* 最淡墨 */

  /* 朱紅（印章與點綴） */
  --vermilion: #a83232;
  --vermilion-deep: #8a2424;
  --vermilion-soft: #c24a3a;

  /* 輔助 */
  --gold: #8a6a2c;           /* 暗金（少用） */
  --moss: #4a5a3a;           /* 墨綠（少用） */

  --serif: "Noto Serif TC", "Songti TC", "Songti SC", "STSong", "PMingLiU", serif;
  --calli: "Ma Shan Zheng", "Noto Serif TC", serif;
  --mono:  "Noto Sans Mono CJK TC", "Menlo", "Consolas", monospace;
}

/* ----- 紙紋背景 ----- */
html, body {
  margin: 0;
  padding: 0;
  background: var(--paper-1);
  color: var(--ink-1);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--paper-1);
  background-image:
    /* 斑駁老舊感 */
    radial-gradient(ellipse at 20% 30%, rgba(138, 106, 44, 0.08) 0%, transparent 40%),
    radial-gradient(ellipse at 80% 70%, rgba(168, 50, 50, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 90%, rgba(42, 33, 26, 0.06) 0%, transparent 45%),
    /* 紙纖維紋理 */
    repeating-linear-gradient(
      90deg,
      transparent 0px,
      transparent 2px,
      rgba(138, 106, 44, 0.015) 2px,
      rgba(138, 106, 44, 0.015) 3px
    ),
    repeating-linear-gradient(
      0deg,
      transparent 0px,
      transparent 3px,
      rgba(42, 33, 26, 0.012) 3px,
      rgba(42, 33, 26, 0.012) 4px
    );
  min-height: 100vh;
}

* { box-sizing: border-box; }

a {
  color: var(--ink-1);
  text-decoration: none;
  border-bottom: 1px solid var(--ink-3);
  transition: color 0.2s, border-color 0.2s;
}
a:hover {
  color: var(--vermilion);
  border-color: var(--vermilion);
}

/* ----- 排版 ----- */
h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  color: var(--ink-0);
  margin: 0;
  letter-spacing: 0.05em;
}

.calli { font-family: var(--calli); font-weight: 400; }

/* ----- 頁首 / 導航 ----- */
.site-header {
  border-bottom: 3px double var(--ink-2);
  padding: 24px 0 18px;
  position: relative;
}
.site-header::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -8px;
  height: 1px;
  background: var(--ink-3);
  opacity: 0.4;
}

.site-header .inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  border: none;
}
.brand:hover { color: inherit; }
.brand .seal {
  width: 52px; height: 52px;
  background: var(--vermilion);
  color: var(--paper-0);
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0;
  line-height: 1;
  border: 2px solid var(--vermilion-deep);
  box-shadow: 0 0 0 1px var(--paper-1), 0 0 0 2px var(--vermilion);
  transform: rotate(-3deg);
  position: relative;
}
.brand .seal::before {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px solid rgba(246, 239, 221, 0.4);
}
.brand .title {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--ink-0);
  letter-spacing: 0.15em;
  line-height: 1;
}
.brand .sub {
  font-family: var(--serif);
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.4em;
  margin-top: 6px;
  font-style: italic;
}

.site-nav {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.site-nav a {
  font-size: 15px;
  letter-spacing: 0.25em;
  padding: 6px 14px;
  border: none;
  color: var(--ink-2);
  position: relative;
}
.site-nav a + a::before {
  content: "｜";
  position: absolute;
  left: -4px;
  color: var(--ink-4);
}
.site-nav a.active {
  color: var(--vermilion);
  font-weight: 700;
}
.site-nav a:hover { color: var(--vermilion); }

/* ----- 容器 ----- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

.page-title {
  padding: 60px 0 32px;
  border-bottom: 1px solid var(--ink-3);
  margin-bottom: 40px;
  position: relative;
}
.page-title .cn {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--ink-0);
}
.page-title .en {
  font-size: 13px;
  color: var(--ink-4);
  letter-spacing: 0.5em;
  margin-top: 12px;
  text-transform: uppercase;
  font-style: italic;
}
.page-title .seal-mark {
  position: absolute;
  right: 0; top: 60px;
  width: 80px; height: 80px;
  background: var(--vermilion);
  color: var(--paper-0);
  display: grid;
  place-items: center;
  font-size: 24px;
  letter-spacing: 0;
  line-height: 1.1;
  text-align: center;
  transform: rotate(4deg);
  box-shadow: 0 0 0 2px var(--paper-1), 0 0 0 3px var(--vermilion-deep);
  padding: 8px;
}

/* ----- 卡片 / 內容區塊 ----- */
.scroll-card {
  background: var(--paper-0);
  border: 1px solid var(--paper-3);
  padding: 28px 32px;
  position: relative;
  box-shadow:
    0 1px 0 var(--paper-shadow),
    1px 2px 0 rgba(42, 33, 26, 0.04);
}
.scroll-card::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid var(--paper-3);
  pointer-events: none;
  opacity: 0.5;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  letter-spacing: 0.5em;
  color: var(--ink-3);
  margin-bottom: 18px;
  text-transform: uppercase;
}
.section-label::before,
.section-label::after {
  content: "";
  width: 32px;
  height: 1px;
  background: var(--ink-3);
}

.section-title {
  font-size: 32px;
  letter-spacing: 0.2em;
  margin-bottom: 8px;
  color: var(--ink-0);
}
.section-subtitle {
  font-size: 14px;
  color: var(--ink-3);
  letter-spacing: 0.3em;
  margin-bottom: 32px;
}

/* ----- 印章 ----- */
.seal-stamp {
  display: inline-grid;
  place-items: center;
  background: var(--vermilion);
  color: var(--paper-0);
  font-family: var(--serif);
  font-weight: 700;
  padding: 10px 12px;
  line-height: 1.1;
  letter-spacing: 0.1em;
  border: 2px solid var(--vermilion-deep);
  box-shadow: 0 0 0 1px var(--paper-0), 0 0 0 2px var(--vermilion);
  transform: rotate(-2deg);
}

.seal-stamp.square {
  width: 64px; height: 64px;
  font-size: 18px;
  writing-mode: vertical-rl;
  text-orientation: upright;
  padding: 6px;
}

/* ----- 按鈕 ----- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 28px;
  border: 1px solid var(--ink-1);
  background: transparent;
  color: var(--ink-0);
  font-family: var(--serif);
  font-size: 15px;
  letter-spacing: 0.3em;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}
.btn:hover {
  background: var(--ink-0);
  color: var(--paper-0);
  border-color: var(--ink-0);
}
.btn.primary {
  background: var(--vermilion);
  color: var(--paper-0);
  border-color: var(--vermilion-deep);
}
.btn.primary:hover {
  background: var(--vermilion-deep);
}

/* ----- 裝飾分隔 ----- */
.divider-ornament {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin: 48px 0;
  color: var(--ink-4);
}
.divider-ornament::before,
.divider-ornament::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--ink-3), transparent);
}
.divider-ornament .mark {
  font-size: 18px;
  color: var(--vermilion);
  letter-spacing: 0.3em;
}

/* ----- 表格 (兵器譜用) ----- */
.booklet {
  background: var(--paper-0);
  border: 2px solid var(--ink-1);
  padding: 0;
  position: relative;
}
.booklet-head {
  background: var(--ink-1);
  color: var(--paper-0);
  padding: 14px 24px;
  font-size: 15px;
  letter-spacing: 0.4em;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ----- 頁尾 ----- */
.site-footer {
  margin-top: 80px;
  border-top: 3px double var(--ink-2);
  padding: 32px 0 48px;
  color: var(--ink-3);
  font-size: 13px;
  letter-spacing: 0.2em;
}
.site-footer .inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.site-footer .lines {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.site-footer .quote {
  font-style: italic;
  color: var(--ink-2);
  letter-spacing: 0.15em;
}

/* ----- 響應式 ----- */
@media (max-width: 820px) {
  .site-header .inner { flex-direction: column; align-items: flex-start; }
  .container { padding: 0 24px; }
  .page-title .cn { font-size: 36px; }
  .page-title .seal-mark { width: 64px; height: 64px; font-size: 18px; }
}

/* ----- 工具類 ----- */
.muted { color: var(--ink-3); }
.vermilion { color: var(--vermilion); }
.small-caps { font-size: 12px; letter-spacing: 0.4em; color: var(--ink-4); text-transform: uppercase; }
.vertical { writing-mode: vertical-rl; text-orientation: mixed; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 820px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}