@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&family=Space+Grotesk:wght@400;500;700&display=swap');

:root {
  --primary: #2563eb;
  --primary-light: #eff6ff;
  --primary-dark: #1d4ed8;
  --success: #16a34a;
  --success-light: #f0fdf4;
  --warning: #d97706;
  --warning-light: #fffbeb;
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --bg: #f8fafc;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --font: 'Noto Sans SC', sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.6;
}

/* Nav */
.nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 18px;
  color: var(--primary);
  text-decoration: none;
}
.nav-links { display: flex; gap: 4px; }
.nav-link {
  padding: 6px 14px;
  border-radius: 6px;
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s;
}
.nav-link:hover, .nav-link.active {
  background: var(--primary-light);
  color: var(--primary);
}
.nav-user { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); }
.nav-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px;
}
.btn-logout {
  font-size: 12px; color: var(--muted);
  background: none; border: 1px solid var(--border);
  padding: 4px 10px; border-radius: 4px; cursor: pointer;
  transition: all 0.15s;
}
.btn-logout:hover { border-color: var(--danger); color: var(--danger); }

/* Page layout */
.page { max-width: 800px; margin: 0 auto; padding: 40px 24px; }
.page-wide { max-width: 1100px; margin: 0 auto; padding: 40px 24px; }

.page-header { margin-bottom: 32px; }
.page-title { font-size: 24px; font-weight: 700; margin-bottom: 6px; }
.page-desc { color: var(--muted); font-size: 14px; }

/* Card */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
}

/* Form */
.form-group { margin-bottom: 20px; }
.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 6px;
}
.form-label span { color: var(--danger); margin-left: 2px; }
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: var(--font);
  font-size: 14px;
  color: var(--text);
  background: var(--surface);
  transition: border 0.15s, box-shadow 0.15s;
  outline: none;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-textarea { resize: vertical; min-height: 100px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-hint { font-size: 12px; color: var(--muted); margin-top: 4px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 20px;
  border-radius: 8px;
  font-family: var(--font);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
  text-decoration: none;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--bg); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-success { background: var(--success); color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-full { width: 100%; justify-content: center; padding: 12px; font-size: 15px; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* Status badge */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px; border-radius: 20px;
  font-size: 12px; font-weight: 500;
}
.badge-pending { background: var(--warning-light); color: var(--warning); }
.badge-done { background: var(--success-light); color: var(--success); }
.badge-open { background: #fef3c7; color: #92400e; }
.badge-closed { background: var(--success-light); color: var(--success); }

/* Alert */
.alert {
  padding: 12px 16px; border-radius: 8px;
  font-size: 13px; margin-bottom: 20px;
  display: none;
}
.alert.show { display: block; }
.alert-success { background: var(--success-light); color: var(--success); border: 1px solid #bbf7d0; }
.alert-error { background: var(--danger-light); color: var(--danger); border: 1px solid #fecaca; }

/* Table */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th {
  text-align: left; padding: 10px 16px;
  background: var(--bg); color: var(--muted);
  font-weight: 500; font-size: 12px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg); }

/* Stats */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 32px; }
.stat-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 20px 24px;
}
.stat-num { font-size: 32px; font-weight: 700; color: var(--primary); line-height: 1; margin-bottom: 4px; }
.stat-label { font-size: 13px; color: var(--muted); }

/* Empty state */
.empty {
  text-align: center; padding: 60px 20px;
  color: var(--muted);
}
.empty-icon { font-size: 40px; margin-bottom: 12px; }
.empty-text { font-size: 14px; }

/* Loading */
.loading { text-align: center; padding: 40px; color: var(--muted); font-size: 13px; }

@media (max-width: 640px) {
  .nav { padding: 0 16px; }
  .nav-links { display: none; }
  .page, .page-wide { padding: 24px 16px; }
  .card { padding: 20px; }
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
}