/* ============================================================
   读数小站 · 通用样式 (shared/style.css)
   风格：简洁清爽 / 大量留白 / 浅色底 / 细边框 / 克制配色
   ============================================================ */

:root {
  /* 主题色 */
  --color-primary: #2f6df6;
  --color-primary-soft: #eaf1ff;
  --color-primary-dark: #1f4fd0;

  /* 背景与表面 */
  --color-bg: #f7f8fb;
  --color-bg-grad-a: #f7f8fb;
  --color-bg-grad-b: #eef2f9;
  --color-surface: #ffffff;

  /* 文字 */
  --color-text: #1d1f24;
  --color-text-soft: #5b6270;
  --color-text-faint: #8b93a3;

  /* 线条 */
  --color-border: #e6e9f0;
  --color-border-strong: #d5dae5;

  /* 其他 */
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(29, 31, 36, .04), 0 8px 24px rgba(29, 31, 36, .06);
  --shadow-hover: 0 2px 6px rgba(29, 31, 36, .06), 0 16px 36px rgba(29, 31, 36, .10);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--color-text);
  background: linear-gradient(160deg, var(--color-bg-grad-a) 0%, var(--color-bg-grad-b) 100%);
  background-attachment: fixed;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: saturate(180%) blur(12px);
  background: rgba(255, 255, 255, .78);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  max-width: 960px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  font-size: 17px;
  letter-spacing: .2px;
  color: var(--color-text);
  text-decoration: none;
  margin-right: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.brand .dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #7aa2ff);
  display: inline-block;
}

.nav a.nav-link {
  color: var(--color-text-soft);
  text-decoration: none;
  font-size: 15px;
  padding: 7px 14px;
  border-radius: 999px;
  transition: background .2s var(--ease), color .2s var(--ease);
}

.nav a.nav-link:hover { background: var(--color-primary-soft); color: var(--color-primary-dark); }
.nav a.nav-link.active { background: var(--color-primary-soft); color: var(--color-primary-dark); font-weight: 600; }

/* ---------- 主内容 ---------- */
main {
  flex: 1 0 auto;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 24px 64px;
}

.hero { text-align: center; margin-bottom: 40px; }

h1 {
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.2;
  margin: 0 0 12px;
  letter-spacing: -.5px;
  background: linear-gradient(120deg, #1d1f24 10%, var(--color-primary) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--color-primary);
}

h2 { font-size: 22px; margin: 0 0 14px; letter-spacing: -.2px; }

.lead { color: var(--color-text-soft); font-size: 17px; margin: 0 auto; max-width: 620px; }

/* ---------- 卡片 ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.entry-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}

.entry-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-border-strong);
}

.entry-card .icon { font-size: 30px; display: block; margin-bottom: 12px; }
.entry-card h3 { margin: 0 0 6px; font-size: 19px; }
.entry-card p { margin: 0; color: var(--color-text-soft); font-size: 15px; }

/* ---------- 表单 ---------- */
.field-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-soft);
  margin-bottom: 8px;
}

.input-row { display: flex; gap: 12px; flex-wrap: wrap; }

input[type="text"], input[type="number"] {
  flex: 1 1 260px;
  min-width: 0;
  font-family: var(--font);
  font-size: 22px;
  letter-spacing: 1px;
  padding: 14px 18px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: #fbfcfe;
  color: var(--color-text);
  outline: none;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
}

input[type="text"]:focus, input[type="number"]:focus {
  border-color: var(--color-primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(47, 109, 246, .12);
}

/* ---------- 按钮 ---------- */
.btn {
  font-family: var(--font);
  font-size: 16px;
  font-weight: 600;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: var(--color-primary);
  color: #fff;
  cursor: pointer;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), background .18s var(--ease);
  box-shadow: 0 4px 14px rgba(47, 109, 246, .25);
}

.btn:hover { transform: translateY(-2px); background: var(--color-primary-dark); box-shadow: 0 8px 20px rgba(47, 109, 246, .32); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-ghost {
  background: #fff;
  color: var(--color-text-soft);
  border: 1px solid var(--color-border-strong);
  box-shadow: none;
}

.btn-ghost:hover { background: var(--color-primary-soft); color: var(--color-primary-dark); border-color: var(--color-primary); box-shadow: none; }

.btn-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }

/* ---------- 结果区 ---------- */
.result-box {
  margin-top: 28px;
  padding: 28px;
  border-radius: var(--radius);
  border: 1px dashed var(--color-border-strong);
  background: #fbfcfe;
  min-height: 96px;
}

.sectioned {
  font-size: 15px;
  color: var(--color-text-faint);
  letter-spacing: 2px;
  margin-bottom: 10px;
  word-break: break-all;
}

.reading {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 700;
  letter-spacing: 2px;
  line-height: 1.5;
  word-break: break-all;
  color: var(--color-text);
}

.reading .char {
  display: inline-block;
  opacity: 0;
  transform: translateY(14px) scale(.8);
  animation: pop .42s var(--ease) forwards;
}

@keyframes pop {
  0%   { opacity: 0; transform: translateY(14px) scale(.8); }
  60%  { opacity: 1; transform: translateY(-3px) scale(1.06); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

.hint { color: var(--color-text-faint); font-size: 15px; margin: 0; }
.error { color: #d64545; font-size: 15px; margin: 10px 0 0; min-height: 22px; }

/* ---------- 历史列表 ---------- */
.history-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }

.history-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
}

.history-item:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--color-border-strong); }

.history-item .num {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--color-primary-dark);
  background: var(--color-primary-soft);
  border-radius: 8px;
  padding: 4px 12px;
  font-size: 15px;
  white-space: nowrap;
}

.history-item .txt { flex: 1; min-width: 0; word-break: break-all; }
.history-item .time { color: var(--color-text-faint); font-size: 13px; white-space: nowrap; }

.empty-state { text-align: center; color: var(--color-text-faint); padding: 40px 0; }

/* ---------- 页脚 ---------- */
.site-footer {
  flex-shrink: 0;
  border-top: 1px solid var(--color-border);
  background: rgba(255, 255, 255, .7);
}

.site-footer .inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 26px 24px;
  text-align: center;
  color: var(--color-text-faint);
  font-size: 14px;
}

.site-footer .slogan { color: var(--color-text-soft); margin-bottom: 4px; }

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  main { padding: 32px 18px 48px; }
  .nav { padding: 12px 18px; }
  .card, .result-box { padding: 20px; }
  .history-item { flex-wrap: wrap; gap: 8px; }
  .history-item .time { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}