@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Design tokens ────────────────────────────────────────────────────────── */
:root {
  /* Core palette */
  --brand:          #2563eb;
  --brand-hover:    #1d4ed8;
  --brand-light:    rgba(37,99,235,0.1);
  --brand-glow:     rgba(37,99,235,0.25);

  /* Sidebar */
  --sidebar-bg:     #0f1117;
  --sidebar-border: rgba(255,255,255,0.06);
  --sidebar-w:      232px;
  --nav-text:       rgba(255,255,255,0.5);
  --nav-text-hover: rgba(255,255,255,0.9);
  --nav-active-bg:  rgba(255,255,255,0.08);
  --nav-active-text:#ffffff;

  /* Surface */
  --bg:             #f8f9fc;
  --surface:        #ffffff;
  --surface-raised: #ffffff;
  --border:         #e5e7eb;
  --border-subtle:  #f0f1f3;

  /* Text */
  --text-primary:   #0f1117;
  --text-secondary: #6b7280;
  --text-tertiary:  #9ca3af;

  /* Status */
  --success:        #16a34a;
  --success-bg:     #f0fdf4;
  --success-border: #bbf7d0;
  --warning:        #d97706;
  --warning-bg:     #fffbeb;
  --warning-border: #fde68a;
  --danger:         #dc2626;
  --danger-bg:      #fef2f2;
  --danger-border:  #fecaca;
  --info:           #2563eb;
  --info-bg:        #eff6ff;
  --info-border:    #bfdbfe;

  /* Elevation */
  --shadow-xs:  0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:  0 4px 6px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg:  0 10px 15px rgba(0,0,0,0.08), 0 4px 6px rgba(0,0,0,0.04);
  --shadow-xl:  0 20px 25px rgba(0,0,0,0.1),  0 8px 10px rgba(0,0,0,0.04);

  /* Geometry */
  --radius-sm:  5px;
  --radius:     8px;
  --radius-md:  10px;
  --radius-lg:  14px;
  --radius-xl:  18px;
  --topbar-h:   56px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  font-size: 0.875rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

.main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

.content {
  padding: 1.75rem 2rem 3rem;
  flex: 1;
}

/* ── Sidebar ──────────────────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  scrollbar-width: none;
  border-right: 1px solid var(--sidebar-border);
}
.sidebar::-webkit-scrollbar { display: none; }

/* Brand */
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 1.125rem 1rem 0.875rem;
  border-bottom: 1px solid var(--sidebar-border);
  margin-bottom: 0.5rem;
  text-decoration: none;
}

.brand-logo {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(37,99,235,0.4);
}

.brand-name {
  font-size: 0.9375rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
}

.brand-tag {
  font-size: 0.625rem;
  font-weight: 600;
  color: var(--nav-text);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* Nav sections */
.sidebar-nav {
  list-style: none;
  padding: 0 0.625rem;
  flex: 1;
}

.nav-section {
  padding: 1rem 0.5rem 0.25rem;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.22);
  pointer-events: none;
}

.sidebar-nav li a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4375rem 0.625rem;
  color: var(--nav-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 500;
  transition: background 0.12s, color 0.12s;
  position: relative;
}

.sidebar-nav li a:hover {
  background: rgba(255,255,255,0.06);
  color: var(--nav-text-hover);
}

.sidebar-nav li a.active {
  background: var(--nav-active-bg);
  color: var(--nav-active-text);
}

.sidebar-nav li a.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 20%;
  height: 60%;
  width: 2.5px;
  background: var(--brand);
  border-radius: 0 2px 2px 0;
}

.nav-icon {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity 0.12s;
}

.sidebar-nav li a:hover .nav-icon,
.sidebar-nav li a.active .nav-icon { opacity: 1; }

/* Sidebar footer */
.sidebar-footer {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--sidebar-border);
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.user-avatar {
  width: 30px;
  height: 30px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  flex-shrink: 0;
}

.user-info { flex: 1; min-width: 0; }

.user-name {
  color: rgba(255,255,255,0.88);
  font-size: 0.8125rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
}

.user-role {
  color: var(--nav-text);
  font-size: 0.6875rem;
  line-height: 1.3;
}

.logout-btn {
  background: none;
  border: none;
  color: rgba(255,255,255,0.3);
  cursor: pointer;
  padding: 0.3rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.12s, background 0.12s;
  flex-shrink: 0;
}

.logout-btn:hover {
  color: rgba(255,255,255,0.8);
  background: rgba(255,255,255,0.06);
}

/* ── Topbar ───────────────────────────────────────────────────────────────── */
.topbar {
  height: var(--topbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 2rem;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-xs);
}

.page-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  flex: 1;
  letter-spacing: -0.01em;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.topbar-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.3125rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}

.topbar-btn:hover {
  background: var(--bg);
  color: var(--text-primary);
  border-color: #d1d5db;
}

/* ── Flash messages ───────────────────────────────────────────────────────── */
.flash {
  padding: 0.6875rem 2rem;
  font-size: 0.8125rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.flash-success { background: var(--success-bg); color: var(--success); border-bottom: 1px solid var(--success-border); }
.flash-error   { background: var(--danger-bg);  color: var(--danger);  border-bottom: 1px solid var(--danger-border); }
.flash-warning { background: var(--warning-bg); color: var(--warning); border-bottom: 1px solid var(--warning-border); }
.flash-info    { background: var(--info-bg);    color: var(--info);    border-bottom: 1px solid var(--info-border); }

/* ── Cards ────────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.card-header {
  padding: 1.125rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.card-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.card-body { padding: 1.5rem; }

/* ── Page header ──────────────────────────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  gap: 1rem;
}

.page-header h2 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

/* ── Stat grid ────────────────────────────────────────────────────────────── */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.15s, transform 0.15s;
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--border-subtle);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.stat-card.accent::before  { background: linear-gradient(90deg, var(--brand), #7c3aed); }
.stat-card.success::before { background: var(--success); }
.stat-card.danger::before  { background: var(--danger); }
.stat-card.warning::before { background: var(--warning); }

.stat-label {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-tertiary);
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.stat-card.accent  .stat-value { color: var(--brand); }
.stat-card.success .stat-value { color: var(--success); }
.stat-card.danger  .stat-value { color: var(--danger); }
.stat-card.warning .stat-value { color: var(--warning); }

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  padding: 0.4375rem 0.875rem;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.12s;
  white-space: nowrap;
  font-family: inherit;
  letter-spacing: -0.005em;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
  box-shadow: 0 1px 2px rgba(37,99,235,0.3), 0 0 0 0 var(--brand-glow);
}
.btn-primary:hover {
  background: var(--brand-hover);
  border-color: var(--brand-hover);
  box-shadow: 0 2px 6px rgba(37,99,235,0.35);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text-primary);
  border-color: var(--border);
  box-shadow: var(--shadow-xs);
}
.btn-secondary:hover {
  background: var(--bg);
  border-color: #d1d5db;
}

.btn-danger {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
}
.btn-danger:hover { background: #b91c1c; }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}
.btn-ghost:hover {
  background: var(--bg);
  color: var(--text-primary);
}

.btn-sm {
  padding: 0.3rem 0.625rem;
  font-size: 0.75rem;
  border-radius: 5px;
}

.btn-xs {
  padding: 0.1875rem 0.5rem;
  font-size: 0.6875rem;
  border-radius: 4px;
}

/* ── Tables ───────────────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
}

thead th {
  padding: 0.625rem 1rem;
  text-align: left;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  white-space: nowrap;
}

thead th:first-child { border-radius: var(--radius-sm) 0 0 0; }
thead th:last-child  { border-radius: 0 var(--radius-sm) 0 0; }

tbody td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
  vertical-align: middle;
}

tbody tr:last-child td { border-bottom: none; }

tbody tr { transition: background 0.08s; }
tbody tr:hover td { background: #fafbfc; }

table a { color: var(--brand); text-decoration: none; font-weight: 500; }
table a:hover { text-decoration: underline; }

.td-muted { color: var(--text-secondary); }
.td-mono  { font-family: 'JetBrains Mono', monospace; font-size: 0.75rem; color: var(--text-secondary); }

/* ── Badges ───────────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.1875rem 0.5rem;
  border-radius: 99px;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
}

.badge-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.7;
}

.badge-success { background: var(--success-bg); color: var(--success); border-color: var(--success-border); }
.badge-danger  { background: var(--danger-bg);  color: var(--danger);  border-color: var(--danger-border); }
.badge-warning { background: var(--warning-bg); color: var(--warning); border-color: var(--warning-border); }
.badge-info    { background: var(--info-bg);    color: var(--info);    border-color: var(--info-border); }
.badge-muted   { background: var(--bg); color: var(--text-secondary); border-color: var(--border); }
.badge-brand   { background: var(--brand-light); color: var(--brand); border-color: rgba(37,99,235,0.2); }

/* ── Forms ────────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 1.125rem; }

.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.375rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.4375rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
  transition: border-color 0.15s, box-shadow 0.15s;
  line-height: 1.5;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-light), var(--shadow-xs);
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-tertiary); }

.form-group textarea { resize: vertical; min-height: 90px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-hint {
  margin-top: 0.3rem;
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

/* ── Login page ───────────────────────────────────────────────────────────── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0f1117;
  background-image:
    radial-gradient(ellipse 60% 50% at 50% -10%, rgba(37,99,235,0.25) 0%, transparent 70%),
    radial-gradient(ellipse 40% 30% at 80% 80%, rgba(124,58,237,0.12) 0%, transparent 60%);
}

.login-box {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 32px 64px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.05);
  backdrop-filter: blur(12px);
}

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

.logo-mark {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  box-shadow: 0 8px 24px rgba(37,99,235,0.4);
}

.login-logo h1 {
  font-size: 1.375rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.03em;
  margin-bottom: 0.25rem;
}

.login-logo p {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.4);
}

/* Override form styles inside login box for dark bg */
.login-box .form-group label {
  color: rgba(255,255,255,0.7);
}

.login-box .form-group input {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.1);
  color: #fff;
  box-shadow: none;
}

.login-box .form-group input:focus {
  background: rgba(255,255,255,0.08);
  border-color: rgba(37,99,235,0.7);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.2);
}

.login-box .form-group input::placeholder { color: rgba(255,255,255,0.25); }

.login-submit {
  width: 100%;
  padding: 0.625rem;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
  box-shadow: 0 4px 12px rgba(37,99,235,0.4);
  margin-top: 0.375rem;
  letter-spacing: -0.01em;
}

.login-submit:hover { opacity: 0.92; transform: translateY(-1px); }
.login-submit:active { transform: translateY(0); }

.login-error {
  background: rgba(220,38,38,0.12);
  border: 1px solid rgba(220,38,38,0.25);
  color: #fca5a5;
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  margin-bottom: 1.25rem;
}

/* ── Dashboard ────────────────────────────────────────────────────────────── */
.dash-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

@media (max-width: 1024px) {
  .dash-grid { grid-template-columns: 1fr; }
}

/* ── Empty state ──────────────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-tertiary);
}

.empty-state svg {
  display: block;
  margin: 0 auto 0.875rem;
  opacity: 0.2;
}

.empty-state p { font-size: 0.8125rem; color: var(--text-secondary); }

/* ── Error pages ──────────────────────────────────────────────────────────── */
.error-page {
  min-height: 100vh;
  background: #0f1117;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.error-code {
  font-size: 5rem;
  font-weight: 800;
  color: rgba(255,255,255,0.06);
  line-height: 1;
  letter-spacing: -0.05em;
  font-variant-numeric: tabular-nums;
}

.error-page h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.error-page p {
  color: rgba(255,255,255,0.35);
  font-size: 0.875rem;
  margin-bottom: 2rem;
}

/* ── Utilities ────────────────────────────────────────────────────────────── */
.text-muted    { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-small    { font-size: 0.8125rem; }
.text-xs       { font-size: 0.75rem; }
.text-center   { text-align: center; }
.text-right    { text-align: right; }
.font-mono     { font-family: 'JetBrains Mono', monospace; }
.font-semibold { font-weight: 600; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.flex         { display: flex; }
.flex-center  { display: flex; align-items: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-1        { gap: 0.5rem; }
.gap-2        { gap: 1rem; }
.flex-wrap    { flex-wrap: wrap; }

.divider {
  border: none;
  border-top: 1px solid var(--border-subtle);
  margin: 1.5rem 0;
}

/* Subtle inner shadow on content area */
.main::before {
  content: '';
  position: fixed;
  top: 0;
  left: var(--sidebar-w);
  width: 1px;
  height: 100vh;
  background: var(--border);
  pointer-events: none;
  z-index: 100;
}