/*
 * 日期推算 的样式。只服务这个 app，不要引用文件夹外的文件。
 *
 * 设计 token 与主页同源（见根目录 README「设计语言」一节）：shadcn zinc 色阶、
 * 0.625rem 基准圆角、system-ui 字体栈、indigo→purple 品牌渐变。照抄这一段即可，
 * 保持全站视觉一致。
 */

:root {
  --background: #ffffff;
  --foreground: #09090b;
  --primary: #18181b;
  --primary-foreground: #fafafa;
  --secondary: #f4f4f5;
  --secondary-foreground: #18181b;
  --muted-foreground: #71717a;
  --accent: #f4f4f5;
  --accent-foreground: #18181b;
  --border: #e4e4e7;
  --ring: #a1a1aa;
  --radius: 0.625rem;
  --brand-from: #6366f1;
  --brand-to: #a855f7;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif;
}

:root[data-theme='dark'] {
  --background: #09090b;
  --foreground: #fafafa;
  --primary: #fafafa;
  --primary-foreground: #18181b;
  --secondary: #27272a;
  --secondary-foreground: #fafafa;
  --muted-foreground: #a1a1aa;
  --accent: #27272a;
  --accent-foreground: #fafafa;
  --border: #27272a;
  --ring: #d4d4d8;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: var(--font-sans);
  background: var(--background);
  color: var(--foreground);
  min-height: 100vh;
  display: grid;
  place-items: center;
  -webkit-font-smoothing: antialiased;
  transition: background-color 200ms ease, color 200ms ease;
}

::selection { background: var(--primary); color: var(--primary-foreground); }

/*
 * 脚手架模板的 body 是 grid + place-items:center（适合单张卡片居中的小 app）。
 * 这个 app 要整页布局，所以改回 block —— 注意必须一并把 place-items 复位：
 * 新版 Chromium 的 justify-items 对块级容器也生效，只改 display 的话子元素
 * 仍会被收缩包裹并居中，页面会莫名其妙只占中间一条。
 */
body { display: block; place-items: normal; }

.app { max-width: 560px; margin: 0 auto; padding: 64px 16px 48px; }

h1 {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}
.sub { font-size: 13px; color: var(--muted-foreground); margin-bottom: 24px; }

.tabs {
  display: flex;
  gap: 2px;
  padding: 3px;
  border-radius: 999px;
  background: var(--secondary);
  border: 1px solid var(--border);
  margin-bottom: 20px;
}
.tabs button {
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  flex: 1;
  padding: 8px 12px;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--muted-foreground);
  cursor: pointer;
  transition: background-color 200ms ease, color 200ms ease;
}
.tabs button:hover { color: var(--foreground); }
.tabs button.is-active { background: var(--background); color: var(--foreground); box-shadow: var(--shadow-sm); }

.panel { display: flex; flex-direction: column; gap: 12px; margin-bottom: 20px; }
.panel[hidden] { display: none; }

.field {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.field:focus-within { border-color: var(--ring); }
.field label { font-size: 13px; color: var(--muted-foreground); white-space: nowrap; }
.field input {
  font: inherit;
  font-size: 15px;
  font-weight: 500;
  border: none;
  background: transparent;
  color: var(--foreground);
  text-align: right;
  font-variant-numeric: tabular-nums;
  min-width: 0;
}
.field input[type='number'] { width: 110px; }
.field input:focus { outline: none; }
.field input::-webkit-calendar-picker-indicator { cursor: pointer; opacity: 0.6; }

.quick { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  font: inherit;
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--secondary);
  color: var(--muted-foreground);
  cursor: pointer;
  transition: background-color 200ms ease, color 200ms ease, border-color 200ms ease;
}
.chip:hover { border-color: var(--ring); color: var(--foreground); }
.chip.is-on { background: var(--primary); color: var(--primary-foreground); border-color: var(--primary); }

/* ---------- 结果 ---------- */

.result {
  padding: 24px 20px;
  border-radius: 1rem;
  background: var(--secondary);
  text-align: center;
  margin-bottom: 14px;
}
.result__label { font-size: 12px; color: var(--muted-foreground); margin-bottom: 8px; }
.result__value {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  background-image: linear-gradient(to right, var(--brand-from), var(--brand-to));
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}
.result__note { font-size: 13px; color: var(--muted-foreground); margin-top: 8px; }

.card { border: 1px solid var(--border); border-radius: 1rem; overflow: hidden; }
.row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}
.row:last-child { border-bottom: none; }
.row__name { color: var(--muted-foreground); }
.row__value { font-variant-numeric: tabular-nums; }

/* Back to home: same spot (top-left) and same look in every app — see README */
.back-home {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 900;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 7px 13px 7px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--background) 80%, transparent);
  backdrop-filter: blur(4px);
  box-shadow: var(--shadow-sm);
  color: var(--muted-foreground);
  font-size: 13px;
  line-height: 1;
  text-decoration: none;
  transition: background-color 200ms ease, color 200ms ease, border-color 200ms ease;
}
.back-home:hover { background: var(--accent); color: var(--accent-foreground); }