/* App — professional, minimal design system (blue palette). */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@400;500;600;700&display=swap');

:root {
  --color-bg: #f5f8fc;
  --color-surface: #ffffff;
  --color-surface-muted: #eaf1fb;
  --color-text: #1c2b3a;
  --color-divider: rgba(28, 43, 58, 0.10);
  --color-divider-strong: rgba(28, 43, 58, 0.18);

  --color-accent: #3457d5;
  --color-accent-600: #2b46b3;
  --color-accent-700: #21358a;
  --color-accent-light: #e2e9fc;

  --color-accent-2: #6f94e8;
  --color-accent-2-light: #e8eefc;

  --color-neutral-light: #eaeff5;
  --color-neutral-text: #5c6b7a;

  --font-heading: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", -apple-system, sans-serif;
  --font-body: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", -apple-system, sans-serif;
  --font-heading-weight: 700;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(28, 43, 58, 0.06);
  --shadow-md: 0 6px 20px rgba(28, 43, 58, 0.08);
  --shadow-lg: 0 24px 56px rgba(28, 43, 58, 0.16);
}

*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; background: var(--color-bg); color: var(--color-text); font-family: var(--font-body); font-size: 15px; line-height: 1.6; font-weight: 400; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  line-height: 1.25; letter-spacing: -0.01em; margin: 0 0 var(--space-2);
}
h1 { font-size: 30px; }
h2 { font-size: 24px; }
h3 { font-size: 19px; }
h4 { font-size: 16px; }
h5 { font-size: 14px; }
h6 { font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; }
p { margin: 0 0 var(--space-3); }
a { color: var(--color-accent); text-decoration: none; text-underline-offset: 3px; }
a:hover { color: var(--color-accent-600); }

.text-muted { color: color-mix(in srgb, var(--color-text) 58%, transparent); }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
::selection { background: color-mix(in srgb, var(--color-accent) 25%, transparent); }

/* — cards — */
.card, .blueprint {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.card-table { background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); overflow: hidden; }

/* — buttons — */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  cursor: pointer; text-decoration: none;
  font-family: var(--font-heading); font-weight: 600;
  font-size: 14px; line-height: 1.2; color: var(--color-text);
  background: transparent; border: 1px solid transparent;
  padding: 9px 16px; border-radius: var(--radius-md);
  transition: background-color .12s ease, border-color .12s ease, color .12s ease;
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.btn-primary:hover { background: var(--color-accent-600); border-color: var(--color-accent-600); }
.btn-primary:active { background: var(--color-accent-700); border-color: var(--color-accent-700); }
.btn-secondary { border-color: var(--color-divider-strong); background: var(--color-surface); color: var(--color-text); }
.btn-secondary:hover { background: var(--color-surface-muted); }
.btn-secondary:active { background: var(--color-neutral-light); }
.btn-ghost { color: var(--color-accent); padding-inline: var(--space-2); }
.btn-ghost:hover { background: var(--color-accent-light); }
.btn-ghost:active { background: color-mix(in srgb, var(--color-accent) 20%, transparent); }
.btn-block { width: 100%; margin-top: var(--space-2); }

/* — forms — */
.field > label {
  display: block; font-size: 12.5px; margin-bottom: 6px; font-weight: 500;
  color: color-mix(in srgb, var(--color-text) 68%, transparent);
}
.input {
  width: 100%; min-height: 38px; padding: 8px 12px; font: inherit;
  font-size: 14px; color: var(--color-text); caret-color: var(--color-accent);
  background: var(--color-surface);
  border: 1px solid var(--color-divider-strong); border-radius: var(--radius-md);
  transition: border-color .12s ease, box-shadow .12s ease;
}
.input::placeholder { color: color-mix(in srgb, var(--color-text) 38%, transparent); }
.input:hover { border-color: color-mix(in srgb, var(--color-text) 40%, transparent); }
.input:focus-visible { border-color: var(--color-accent); outline: none; box-shadow: 0 0 0 3px var(--color-accent-light); }
textarea.input { min-height: 84px; resize: vertical; }

.radio { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font-size: 14px; }
.radio input { position: absolute; opacity: 0; width: 0; height: 0; pointer-events: none; }
.radio .dot {
  width: 18px; height: 18px; flex: none; border-radius: 50%;
  border: 1.5px solid var(--color-divider-strong); transition: border-color .12s ease, background-color .12s ease;
}
.radio:hover .dot { border-color: var(--color-accent); }
.radio input:checked + .dot {
  border-color: var(--color-accent); background: var(--color-accent);
  box-shadow: inset 0 0 0 4px var(--color-surface);
}
.radio input:focus-visible + .dot { outline: 2px solid var(--color-accent); outline-offset: 2px; }

.seg {
  display: inline-flex; gap: 2px; padding: 3px;
  background: var(--color-surface-muted); border-radius: var(--radius-pill);
}
.seg-opt { position: relative; }
.seg-opt input { position: absolute; opacity: 0; width: 0; height: 0; pointer-events: none; }
.seg-opt {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px; font-size: 13px; font-weight: 500; cursor: pointer;
  border-radius: var(--radius-pill); color: var(--color-neutral-text);
  transition: background-color .12s ease, color .12s ease;
}
.seg-opt:has(input:checked) { background: var(--color-surface); color: var(--color-text); box-shadow: var(--shadow-sm); }
.seg-opt:not(:has(input:checked)):hover { color: var(--color-text); }
.seg-opt:has(input:focus-visible) { outline: 2px solid var(--color-accent); outline-offset: 2px; }

/* — tags — */
.tag {
  display: inline-flex; align-items: center; font-size: 12px; font-weight: 500;
  letter-spacing: 0.01em; padding: 4px 11px;
  border-radius: var(--radius-pill);
}
.tag-accent { background: var(--color-accent-light); color: var(--color-accent-700); }
.tag-accent-2 { background: var(--color-accent-2-light); color: color-mix(in srgb, var(--color-accent-2) 55%, #000); }
.tag-neutral { background: var(--color-neutral-light); color: var(--color-neutral-text); }
.tag-outline { border: 1px solid var(--color-divider-strong); color: var(--color-neutral-text); }
.tag-closed { background: var(--color-text); color: var(--color-surface); }

/* — tables — */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th {
  text-align: left; font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; font-weight: 600;
  color: color-mix(in srgb, var(--color-text) 50%, transparent);
  padding: var(--space-3) var(--space-4); border-bottom: 1px solid var(--color-divider);
  background: var(--color-surface-muted);
}
.table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
}
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover { background: color-mix(in srgb, var(--color-accent) 4%, transparent); }

/* — dialog — */
.dialog-backdrop {
  position: fixed; inset: 0; display: grid; place-items: center;
  padding: var(--space-4);
  background: rgba(28, 43, 58, 0.42); backdrop-filter: blur(1px);
}
.dialog {
  width: min(440px, 100%); display: flex; flex-direction: column; gap: var(--space-4);
  padding: var(--space-6); border-radius: var(--radius-lg);
  background: var(--color-surface); box-shadow: var(--shadow-lg); border: 1px solid var(--color-divider);
}
.dialog-title { font-family: var(--font-heading); font-weight: 700; font-size: 19px; }
.dialog-body { font-size: 14px; opacity: 0.85; }
.dialog-actions { display: flex; justify-content: flex-end; gap: var(--space-2); margin-top: var(--space-2); }