:root {
  --bg: #0a0a0a;
  --bg-gradient: radial-gradient(ellipse 80% 50% at 20% 40%, rgba(212,168,67,0.03), transparent),
                 radial-gradient(ellipse 60% 40% at 80% 60%, rgba(212,168,67,0.02), transparent);
  --sidebar-bg: #0d0d0d;
  --surface: #111111;
  --surface-hover: #161616;
  --surface-elevated: #141414;
  --border: rgba(255,255,255,0.04);
  --border-hover: rgba(255,255,255,0.08);
  --text: #ffffff;
  --text-secondary: rgba(255,255,255,0.6);
  --text-muted: rgba(255,255,255,0.4);
  --accent: #d4a843;
  --accent-soft: rgba(212,168,67,0.12);
  --accent-hover: rgba(212,168,67,0.2);
  --success: #22c55e;
  --warning: #eab308;
  --danger: #ef4444;
  --radius: 16px;
  --radius-sm: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--bg);
  background-image: var(--bg-gradient);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
}

a { color: inherit; text-decoration: none; }

/* ─── Sidebar ───────────────────────────────────────── */
.sidebar {
  width: 220px;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 20px 24px;
  border-bottom: 1px solid var(--border);
}

.brand-icon {
  width: 28px;
  height: 28px;
  background: var(--accent-soft);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
}

.brand-text {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 12px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.15s ease;
}

.sidebar-link:hover {
  background: var(--surface-hover);
  color: var(--text);
}

.sidebar-link.active {
  background: var(--accent-soft);
  color: var(--accent);
}

.sidebar-footer {
  margin-top: auto;
  padding: 16px 12px;
  border-top: 1px solid var(--border);
}

/* ─── Main Wrapper ──────────────────────────────────── */
.main-wrapper {
  flex: 1;
  margin-left: 220px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: calc(100% - 220px);
}

/* ─── Topbar ────────────────────────────────────────── */
.topbar {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  border-bottom: 1px solid var(--border);
  background: rgba(10,10,10,0.8);
  backdrop-filter: blur(20px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-title {
  font-size: 14px;
  color: var(--text-secondary);
}

.topbar-title span {
  color: var(--text);
  font-weight: 500;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.user-menu {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
}

/* ─── Page Content ──────────────────────────────────── */
.page-content {
  flex: 1;
  padding: 32px;
}

/* ─── Hero ──────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 4rem 2rem;
}

.hero h1 {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.hero p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* ─── Cards ─────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s ease;
}

.card:hover { border-color: var(--border-hover); }

.card h2 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.card p {
  color: var(--text-secondary);
  font-size: 14px;
}

/* ─── Buttons ───────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--surface-elevated);
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #0a0a0a;
}

.btn-primary:hover {
  background: #c99a3a;
  border-color: #c99a3a;
}

.btn-secondary {
  background: var(--surface-elevated);
  border-color: var(--border);
  color: var(--text-secondary);
}

.btn-secondary:hover {
  background: var(--surface-hover);
  color: var(--text);
}

.btn-success {
  background: var(--success);
  border-color: var(--success);
  color: #0a0a0a;
}

.btn-success:hover {
  background: #16a34a;
  border-color: #16a34a;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 12px;
  border-radius: 8px;
}

/* ─── Grid Layouts ──────────────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

/* ─── Page Header ───────────────────────────────────── */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.page-header h1 {
  font-size: 24px;
  font-weight: 600;
}

/* ─── Tables ────────────────────────────────────────── */
.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.data-table thead th {
  text-align: left;
  padding: 14px 20px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.data-table tbody td {
  padding: 16px 20px;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.data-table tbody tr {
  transition: background 0.15s ease;
}

.data-table tbody tr:hover {
  background: var(--surface-hover);
}

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

/* ─── Badges ────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--border);
}

.badge-draft { background: rgba(255,255,255,0.05); color: var(--text-muted); }
.badge-active { background: rgba(34,197,94,0.1); color: var(--success); border-color: rgba(34,197,94,0.2); }
.badge-paused { background: rgba(234,179,8,0.1); color: var(--warning); border-color: rgba(234,179,8,0.2); }
.badge-done { background: rgba(59,130,246,0.1); color: #60a5fa; border-color: rgba(59,130,246,0.2); }
.badge-cancelled { background: rgba(239,68,68,0.1); color: var(--danger); border-color: rgba(239,68,68,0.2); }
.badge-pending { background: rgba(234,179,8,0.1); color: var(--warning); border-color: rgba(234,179,8,0.2); }
.badge-submitted { background: rgba(59,130,246,0.1); color: #60a5fa; border-color: rgba(59,130,246,0.2); }
.badge-approved { background: rgba(34,197,94,0.1); color: var(--success); border-color: rgba(34,197,94,0.2); }
.badge-rejected { background: rgba(239,68,68,0.1); color: var(--danger); border-color: rgba(239,68,68,0.2); }

/* ─── Forms ─────────────────────────────────────────── */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface-elevated);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

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

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 1.5rem;
}

/* ─── Timesheet ─────────────────────────────────────── */
.timesheet-grid {
  display: grid;
  grid-template-columns: 200px repeat(7, 1fr);
  gap: 0.5rem;
  background: var(--surface);
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow-x: auto;
}

.timesheet-header {
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 0.5rem;
  text-align: center;
}

.timesheet-cell {
  padding: 0.5rem;
  text-align: center;
}

.timesheet-cell input {
  width: 100%;
  padding: 0.4rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  text-align: center;
  background: var(--surface-elevated);
  color: var(--text);
}

.timesheet-project {
  font-weight: 500;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  color: var(--text);
}

.timesheet-totals {
  margin-top: 1rem;
  display: flex;
  gap: 1.5rem;
}

.timesheet-totals .total-box {
  background: var(--surface);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-weight: 600;
}

/* ─── Modal ─────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.7);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 100;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 2rem;
  border-radius: var(--radius);
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal h2 {
  margin-bottom: 1.5rem;
  font-size: 1.25rem;
}

/* ─── Alerts ────────────────────────────────────────── */
.alert {
  padding: 0.75rem 1rem;
  border-radius: 10px;
  margin-bottom: 1rem;
  font-size: 14px;
}

.alert-success {
  background: rgba(34,197,94,0.1);
  color: var(--success);
  border: 1px solid rgba(34,197,94,0.2);
}

.alert-error {
  background: rgba(239,68,68,0.1);
  color: var(--danger);
  border: 1px solid rgba(239,68,68,0.2);
}

/* ─── Loading ───────────────────────────────────────── */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
  color: var(--text-muted);
}

/* ─── Scrollbar ─────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.15); }

/* ─── Selection ─────────────────────────────────────── */
::selection {
  background: var(--accent-soft);
  color: var(--text);
}

/* ─── Utils ─────────────────────────────────────────── */
.text-right { text-align: right; }
.text-center { text-align: center; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.hidden { display: none; }

/* ─── Responsive ────────────────────────────────────── */
@media (max-width: 1024px) {
  .sidebar { width: 64px; }
  .sidebar .brand-text,
  .sidebar-link span { display: none; }
  .sidebar-brand { justify-content: center; padding: 20px 12px; }
  .sidebar-nav { padding: 16px 8px; }
  .sidebar-link { justify-content: center; padding: 12px; }
  .main-wrapper { margin-left: 64px; width: calc(100% - 64px); }
}

@media (max-width: 768px) {
  .page-content { padding: 20px; }
  .topbar { padding: 0 20px; }
  .timesheet-grid { grid-template-columns: 120px repeat(7, 1fr); }
}