/*
 * Anthropic-inspired Design System
 * ================================
 * Reusable theme file for internal tools.
 * Include this file first, then add app-specific styles.
 *
 * Fonts: Source Serif 4 (headings) + Inter (body)
 * Palette: warm cream backgrounds, terracotta accents, dark header
 */

@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,500;0,8..60,600;0,8..60,700&family=Inter:wght@300;400;500;600&display=swap');

/* ---------------------------------------------------------------------------
   Design tokens
   --------------------------------------------------------------------------- */
:root {
  /* Brand */
  --primary: #d97757;
  --primary-hover: #c4624a;
  --primary-light: #e8a48e;
  --primary-subtle: rgba(217,119,87,.08);

  /* Backgrounds */
  --bg: #faf8f5;
  --bg-warm: #f5f0ea;
  --card: #ffffff;

  /* Text */
  --text: #131314;
  --text-secondary: #6b6764;
  --text-tertiary: #9b9590;

  /* Borders */
  --border: #e8e2da;
  --border-hover: #d5cdc4;

  /* Semantic */
  --success: #2e7d5b;
  --success-bg: #eef7f2;
  --warning: #b8860b;
  --warning-bg: #fdf6e3;
  --danger: #c0392b;

  /* Radii */
  --radius: 12px;
  --radius-sm: 8px;

  /* Shadows */
  --shadow: 0 1px 2px rgba(19,19,20,.04), 0 1px 4px rgba(19,19,20,.04);
  --shadow-lg: 0 4px 16px rgba(19,19,20,.08);

  /* Typography */
  --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Motion */
  --transition: .2s ease;
}

/* ---------------------------------------------------------------------------
   Reset & base
   --------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  background: var(--bg); color: var(--text); line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------------------------------------------------------------------------
   Header
   --------------------------------------------------------------------------- */
.header {
  background: var(--text); color: var(--bg);
  padding: 0 2rem; display: flex; align-items: center; height: 56px;
  position: sticky; top: 0; z-index: 100;
}
.header h1 {
  font-family: var(--font-serif); font-size: 1.15rem; font-weight: 500;
  letter-spacing: -0.01em; color: #faf8f5;
}
.header nav { margin-left: auto; display: flex; gap: 0.25rem; }
.header nav button {
  background: transparent; color: rgba(250,248,245,.65); border: none;
  padding: 0.45rem 1rem; border-radius: var(--radius-sm); cursor: pointer;
  font-family: var(--font-sans); font-size: 0.8rem; font-weight: 500;
  letter-spacing: 0.01em; transition: all var(--transition);
}
.header nav button:hover { color: #faf8f5; background: rgba(250,248,245,.1); }
.header nav button.active { color: #faf8f5; background: rgba(250,248,245,.15); }

/* ---------------------------------------------------------------------------
   Layout
   --------------------------------------------------------------------------- */
.container { max-width: 940px; margin: 2.5rem auto; padding: 0 1.5rem; }
.panel { display: none; }
.panel.active { display: block; }

/* ---------------------------------------------------------------------------
   Cards
   --------------------------------------------------------------------------- */
.card {
  background: var(--card); border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 1.75rem; margin-bottom: 1.25rem;
  transition: box-shadow var(--transition);
}
.card:hover { box-shadow: var(--shadow); }
.card h2 {
  font-family: var(--font-serif); font-size: 1.15rem; font-weight: 500;
  margin-bottom: 1rem; color: var(--text); letter-spacing: -0.01em;
}
.card h3 {
  font-family: var(--font-serif); font-size: 0.95rem; font-weight: 500;
  margin-bottom: 0.75rem; color: var(--text);
}

/* ---------------------------------------------------------------------------
   Form elements
   --------------------------------------------------------------------------- */
label {
  display: block; font-size: 0.78rem; font-weight: 500;
  color: var(--text-secondary); margin-bottom: 0.35rem;
  letter-spacing: 0.01em;
}
input, select, textarea {
  width: 100%; padding: 0.55rem 0.85rem;
  border: 1px solid var(--border); background: var(--card);
  border-radius: var(--radius-sm); font-size: 0.875rem;
  font-family: var(--font-sans); color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(217,119,87,.12);
}
.form-row { display: grid; gap: 1rem; margin-bottom: 0.85rem; }
.form-row.cols-2 { grid-template-columns: 1fr 1fr; }
.form-row.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
.form-row.cols-4 { grid-template-columns: 1fr 1fr 1fr 1fr; }
.form-group { display: flex; flex-direction: column; }

/* ---------------------------------------------------------------------------
   Buttons
   --------------------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.55rem 1.25rem; border: none; border-radius: var(--radius-sm);
  font-family: var(--font-sans); font-size: 0.84rem; font-weight: 500;
  cursor: pointer; transition: all var(--transition);
  letter-spacing: 0.01em;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #256b4d; transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-outline {
  background: transparent; color: var(--text);
  border: 1px solid var(--border);
}
.btn-outline:hover { border-color: var(--border-hover); background: var(--bg-warm); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #a93226; }
.btn-sm { padding: 0.35rem 0.75rem; font-size: 0.78rem; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }
.btn-group { display: flex; gap: 0.75rem; margin-top: 1.25rem; }

/* ---------------------------------------------------------------------------
   Tables
   --------------------------------------------------------------------------- */
.data-table { width: 100%; border-collapse: collapse; font-size: 0.84rem; }
.data-table th {
  text-align: left; padding: 0.65rem 0.85rem;
  background: var(--bg-warm); color: var(--text-secondary);
  font-weight: 500; border-bottom: 1px solid var(--border);
  font-size: 0.75rem; letter-spacing: 0.03em; text-transform: uppercase;
}
.data-table td { padding: 0.65rem 0.85rem; border-bottom: 1px solid var(--border); }
.data-table tr { transition: background var(--transition); }
.data-table tbody tr:hover { background: var(--bg-warm); }

/* ---------------------------------------------------------------------------
   Badges
   --------------------------------------------------------------------------- */
.badge {
  display: inline-block; padding: 0.2rem 0.6rem; border-radius: 99px;
  font-size: 0.68rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ---------------------------------------------------------------------------
   Member / group cards
   --------------------------------------------------------------------------- */
.member-card {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.25rem; margin-bottom: 0.85rem; background: var(--bg);
  transition: border-color var(--transition);
}
.member-card:hover { border-color: var(--border-hover); }
.member-card-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 0.85rem;
}

/* ---------------------------------------------------------------------------
   Spinner
   --------------------------------------------------------------------------- */
.spinner {
  display: inline-block; width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,.3); border-top-color: #fff;
  border-radius: 50%; animation: spin .6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------------------------------------------------------------------------
   Empty state
   --------------------------------------------------------------------------- */
.empty-state {
  text-align: center; padding: 3.5rem 1rem; color: var(--text-tertiary);
}
.empty-state .icon { font-size: 2.25rem; margin-bottom: 0.75rem; opacity: 0.7; }

/* ---------------------------------------------------------------------------
   Toast notifications
   --------------------------------------------------------------------------- */
.toast {
  position: fixed; bottom: 1.5rem; right: 1.5rem;
  background: var(--text); color: var(--bg); padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm); font-size: 0.84rem; z-index: 200;
  box-shadow: var(--shadow-lg); opacity: 0; transform: translateY(10px);
  transition: all .3s ease;
}
.toast.show { opacity: 1; transform: translateY(0); }

/* ---------------------------------------------------------------------------
   Scrollbar
   --------------------------------------------------------------------------- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }