/* ─── Reset & Variables ─────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --success: #22c55e;
  --warning: #f59e0b;
  --bg: #f8fafc;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-muted: #64748b;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --shadow-lg: 0 10px 25px rgba(0,0,0,.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ─── Auth Layout ──────────────────────────────────────────────────────────── */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.auth-card {
  background: var(--surface);
  border-radius: 16px;
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
}

.auth-logo {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-logo h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary);
}

.auth-logo p {
  color: var(--text-muted);
  font-size: .9rem;
  margin-top: .25rem;
}

/* ─── Form Elements ─────────────────────────────────────────────────────────── */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: .875rem;
  font-weight: 500;
  margin-bottom: .4rem;
  color: var(--text);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: .625rem .875rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: .95rem;
  color: var(--text);
  background: var(--surface);
  transition: border-color .15s, box-shadow .15s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

/* ─── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .625rem 1.25rem;
  border: none;
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background .15s, transform .08s;
  text-decoration: none;
}

.btn:active { transform: scale(.98); }

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled { background: #a5b4fc; cursor: not-allowed; transform: none; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1.5px solid var(--border);
}
.btn-ghost:hover { background: var(--bg); color: var(--text); }

.btn-full { width: 100%; justify-content: center; }

/* ─── Alert ─────────────────────────────────────────────────────────────────── */
.alert {
  padding: .75rem 1rem;
  border-radius: var(--radius);
  font-size: .875rem;
  margin-bottom: 1rem;
  display: none;
}
.alert.show { display: block; }
.alert-error { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.alert-success { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; }

/* ─── Auth Footer Link ──────────────────────────────────────────────────────── */
.auth-footer {
  text-align: center;
  margin-top: 1.5rem;
  font-size: .875rem;
  color: var(--text-muted);
}
.auth-footer a { color: var(--primary); text-decoration: none; font-weight: 500; }
.auth-footer a:hover { text-decoration: underline; }

/* ─── Dashboard Layout ──────────────────────────────────────────────────────── */
.layout { display: flex; flex-direction: column; min-height: 100vh; }

.navbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.navbar-brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

.navbar-user {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: .875rem;
  color: var(--text-muted);
}

.navbar-user strong { color: var(--text); }

.main { flex: 1; padding: 2rem 1.5rem; max-width: 960px; width: 100%; margin: 0 auto; }

/* ─── Page Header ───────────────────────────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
  gap: 1rem;
}
.page-header h2 { font-size: 1.5rem; font-weight: 700; }

/* ─── Project Cards ─────────────────────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.project-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s, transform .1s;
}

.project-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: .5rem;
  margin-bottom: .5rem;
}

.project-card h3 {
  font-size: 1rem;
  font-weight: 600;
  word-break: break-word;
}

.project-card p {
  font-size: .85rem;
  color: var(--text-muted);
  margin-bottom: .875rem;
  min-height: 1.2em;
}

.project-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ─── Status Badge ──────────────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: .2rem .6rem;
  border-radius: 99px;
  font-size: .75rem;
  font-weight: 600;
  white-space: nowrap;
}
.badge-active { background: #dcfce7; color: #166534; }
.badge-completed { background: #dbeafe; color: #1e40af; }
.badge-archived { background: #f1f5f9; color: #64748b; }

/* ─── Empty State ───────────────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-muted);
}
.empty-state svg { margin-bottom: 1rem; opacity: .4; }
.empty-state h3 { font-size: 1.1rem; margin-bottom: .5rem; color: var(--text); }

/* ─── Modal ─────────────────────────────────────────────────────────────────── */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.modal-backdrop.show { display: flex; }

.modal {
  background: var(--surface);
  border-radius: 16px;
  padding: 2rem;
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-lg);
  animation: slideUp .2s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}
.modal-header h3 { font-size: 1.2rem; font-weight: 700; }

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1.4rem;
  line-height: 1;
  padding: .2rem .4rem;
  border-radius: 6px;
}
.modal-close:hover { background: var(--bg); }

.modal-footer {
  display: flex;
  gap: .75rem;
  justify-content: flex-end;
  margin-top: 1.5rem;
}

/* ─── Spinner ───────────────────────────────────────────────────────────────── */
.spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .6s linear infinite;
  display: none;
}
.spinner.show { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Admin ─────────────────────────────────────────────────────────────────── */
.admin-badge {
  background: #fef3c7; color: #92400e;
  font-size: .7rem; font-weight: 700;
  padding: .15rem .5rem; border-radius: 99px;
  vertical-align: middle; margin-left: .4rem;
}

.admin-tabs {
  display: flex;
  gap: .5rem;
  margin-bottom: 1.75rem;
  border-bottom: 2px solid var(--border);
}

.admin-tab {
  padding: .6rem 1.2rem;
  border: none;
  background: none;
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color .15s, border-color .15s;
}
.admin-tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.admin-tab:hover { color: var(--text); }

.admin-table-wrap {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  overflow: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
}

.admin-table th {
  background: var(--bg);
  padding: .75rem 1rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1.5px solid var(--border);
  white-space: nowrap;
}

.admin-table td {
  padding: .75rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover td { background: var(--bg); }

.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.stat-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
}

.stat-card .stat-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}

.stat-card .stat-label {
  font-size: .8rem;
  color: var(--text-muted);
  margin-top: .25rem;
}

/* ─── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .auth-card { padding: 1.75rem 1.25rem; }
  .main { padding: 1.25rem 1rem; }
  .navbar { padding: 0 1rem; }
}