/* Giraffe web shell — welcome / navigation / admin home / language switch (S1) */
*, *::before, *::after { box-sizing: border-box; }

:root {
  --bg: #f5f6fa;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #1a1a1a;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-contrast: #ffffff;
}

html, body { height: 100%; }

body.shell-body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans', 'Noto Sans CJK SC', sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

/* --- Header / nav --- */
.shell-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  padding: 0 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.shell-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
}
.shell-brand__icon { width: 28px; height: 28px; object-fit: contain; }
.shell-header__actions { display: flex; align-items: center; gap: 12px; }

.shell-main {
  max-width: 960px;
  margin: 28px auto;
  padding: 0 16px;
}

/* --- Language switch --- */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
}
.lang-switch__icon { font-size: 16px; line-height: 1; }
.lang-switch__select {
  appearance: auto;
  padding: 5px 8px;
  border-radius: 6px;
  border: 1px solid #d1d5db;
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
}
.lang-switch__go { margin-left: 4px; }

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid #d1d5db;
  background: var(--surface);
  color: #374151;
  font-size: 13px;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { background: #f3f4f6; }
.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--primary-contrast);
}
.btn-primary:hover { background: #1d4ed8; }

/* --- Welcome page (must fit without scroll) --- */
.welcome-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(160deg, #f8fafc 0%, #eef2ff 100%);
}
.welcome-lang {
  position: fixed;
  top: 16px;
  right: 20px;
}
.welcome {
  text-align: center;
  padding: 24px;
  max-width: 640px;
}
.welcome__icon { font-size: 72px; line-height: 1; width: 72px; height: 72px; object-fit: contain; }
.welcome__title { margin: 12px 0 4px; font-size: 28px; }
.welcome__tagline { margin: 0 0 28px; color: var(--muted); font-size: 15px; }
.welcome__branches {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}
.welcome__branch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: 200px;
  padding: 24px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  text-decoration: none;
  color: var(--text);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
  transition: transform 0.12s, box-shadow 0.12s, border-color 0.12s;
}
.welcome__branch:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.12);
}
.welcome__branch-icon { font-size: 34px; line-height: 1; }
.welcome__branch-label { font-size: 17px; font-weight: 600; }
.welcome__branch-hint { font-size: 12px; color: var(--muted); }

/* --- Admin home --- */
.admin-home__title { margin: 0 0 4px; font-size: 24px; }
.admin-home__subtitle { margin: 0 0 24px; color: var(--muted); }
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}
.card {
  display: block;
  padding: 20px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  text-decoration: none;
  color: var(--text);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
  transition: transform 0.12s, box-shadow 0.12s, border-color 0.12s;
}
.card:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.1);
}
.card__icon { font-size: 30px; line-height: 1; margin-bottom: 8px; }
.card__title { margin: 0 0 6px; font-size: 17px; }
.card__desc { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.5; }
.card__count {
  margin-top: 12px;
  font-size: 13px;
  color: var(--text);
}
.card__count-num { font-weight: 700; font-size: 16px; }
.card__count-label { color: var(--muted); }

/* --- Stub / settings --- */
.stub__back, .settings .stub__back {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--primary);
  text-decoration: none;
  font-size: 13px;
}
.stub__back:hover { text-decoration: underline; }
.stub__title, .settings__title { margin: 0 0 8px; font-size: 22px; }
.stub__desc, .settings__desc { color: var(--muted); margin: 0 0 12px; }
.stub__note {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: #eef2ff;
  color: #3730a3;
  font-size: 12px;
}

.lang-form { display: flex; flex-direction: column; gap: 12px; max-width: 280px; }
.lang-form__option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
}
.lang-form__option:hover { border-color: var(--primary); }
.lang-form .btn-primary { align-self: flex-start; margin-top: 4px; }