/* ========================================
   A Farewell to iFlow
   纸质风格全局样式
   ======================================== */

/* ---------- 基础重置与变量 ---------- */
:root {
  --paper-bg: #f8f5f0;
  --paper-bg-alt: #f5f0e8;
  --paper-dark: #e8e2d8;
  --ink-primary: #2c2418;
  --ink-secondary: #5a4d3a;
  --ink-muted: #8a7d6a;
  --accent-warm: #b87333;
  --accent-subtle: #c9a96e;
  --shadow-soft: rgba(44, 36, 24, 0.08);
  --shadow-hover: rgba(44, 36, 24, 0.15);
  --border-color: rgba(44, 36, 24, 0.12);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background-color: var(--paper-bg);
  color: var(--ink-primary);
  line-height: 1.7;
  min-height: 100vh;
  
  /* 纸质纹理效果 */
  background-image: 
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 28px,
      rgba(139, 119, 101, 0.03) 28px,
      rgba(139, 119, 101, 0.03) 29px
    ),
    linear-gradient(
      135deg,
      transparent 25%,
      rgba(255, 255, 255, 0.05) 25%,
      rgba(255, 255, 255, 0.05) 50%,
      transparent 50%,
      transparent 75%,
      rgba(0, 0, 0, 0.02) 75%
    );
  background-size: 100% 29px, 4px 4px;
}

/* ---------- 容器布局 ---------- */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

.container--wide {
  max-width: 1100px;
}

/* ---------- 页头 ---------- */
.header {
  text-align: center;
  margin-bottom: 3.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.header__title {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2.2rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--ink-primary);
  margin-bottom: 0.8rem;
}

.header__subtitle {
  font-size: 0.95rem;
  color: var(--ink-muted);
  font-style: italic;
  max-width: 500px;
  margin: 0 auto;
}

.header__meta {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--ink-muted);
}

/* ---------- 卡片网格 ---------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* ---------- 卡片组件 ---------- */
.card {
  background: linear-gradient(
    145deg,
    var(--paper-bg) 0%,
    var(--paper-bg-alt) 100%
  );
  border: 1px solid var(--border-color);
  border-radius: 3px;
  padding: 1.5rem;
  cursor: pointer;
  transition: 
    transform 0.25s ease,
    box-shadow 0.25s ease;
  box-shadow: 
    0 2px 8px var(--shadow-soft),
    0 1px 2px var(--shadow-soft);
  text-decoration: none;
  display: block;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 
    0 8px 24px var(--shadow-hover),
    0 3px 8px var(--shadow-soft);
}

.card:focus {
  outline: 2px solid var(--accent-warm);
  outline-offset: 2px;
}

.card__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 0.8rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px dashed var(--border-color);
}

.card__name {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--ink-primary);
}

.card__role {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-warm);
}

.card__preview {
  font-size: 0.9rem;
  color: var(--ink-secondary);
  line-height: 1.6;
}

.card__date {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--ink-muted);
}

/* ---------- 详情页样式 ---------- */
.detail-page {
  min-height: 100vh;
}

.detail-content {
  background: linear-gradient(
    180deg,
    var(--paper-bg) 0%,
    var(--paper-bg-alt) 100%
  );
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 2.5rem;
  margin-top: 1rem;
  box-shadow: 0 4px 20px var(--shadow-soft);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  color: var(--ink-muted);
  text-decoration: none;
  padding: 0.5rem 0;
  transition: color 0.2s ease;
}

.back-link:hover {
  color: var(--accent-warm);
}

.back-link::before {
  content: "←";
  font-size: 1.1em;
}

.detail-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.detail-header__name {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2rem;
  font-weight: 400;
  color: var(--ink-primary);
  margin-bottom: 0.3rem;
}

.detail-header__meta {
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.detail-body {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink-secondary);
}

.detail-body p {
  margin-bottom: 1.2rem;
}

.detail-body p:last-child {
  margin-bottom: 0;
}

/* ---------- 告别信/签名风格 ---------- */
.farewell-letter {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.05rem;
  line-height: 1.9;
}

.farewell-letter p {
  text-indent: 2em;
  margin-bottom: 1.5rem;
}

.farewell-letter .signature {
  text-indent: 0;
  text-align: right;
  margin-top: 2.5rem;
  font-style: italic;
  color: var(--ink-primary);
}

.farewell-letter .signature .name {
  font-size: 1.15rem;
  margin-bottom: 0.3rem;
}

.farewell-letter .signature .date {
  font-size: 0.9rem;
  color: var(--ink-muted);
}

/* ---------- 引用/强调块 ---------- */
.quote-block {
  border-left: 3px solid var(--accent-subtle);
  padding-left: 1.2rem;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--ink-secondary);
}

/* ---------- 页脚 ---------- */
.footer {
  text-align: center;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--ink-muted);
}

/* ---------- 响应式 ---------- */
@media (max-width: 600px) {
  .container {
    padding: 2rem 1rem 3rem;
  }
  
  .header__title {
    font-size: 1.8rem;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .detail-content {
    padding: 1.5rem;
  }
  
  .detail-header__name {
    font-size: 1.6rem;
  }
}