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

:root {
  --coal: #1a1a1a;
  --graphite: #2d2d2d;
  --steel: #4a4a4a;
  --concrete: #8a8a8a;
  --fog: #c4c4c4;
  --chalk: #f0ede8;
  --white: #fafaf8;
  --signal: #e85d2a;
  --signal-soft: #fef0ea;
  --signal-glow: rgba(232, 93, 42, 0.12);
  --green: #22c55e;
  --green-soft: #f0fdf4;
  --yellow: #eab308;
  --yellow-soft: #fefce8;
  --red: #ef4444;
  --red-soft: #fef2f2;
  --blue: #3b82f6;
  --blue-soft: #eff6ff;
  --sidebar-w: 260px;
}

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--white);
  color: var(--coal);
  line-height: 1.6;
}

/* ============ AUTH ============ */
.auth-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--chalk);
}
.auth-container {
  background: var(--white);
  border-radius: 16px;
  padding: 48px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}
.auth-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 28px;
  letter-spacing: -0.5px;
  text-align: center;
  margin-bottom: 8px;
}
.auth-logo span { color: var(--signal); }
.auth-subtitle {
  text-align: center;
  color: var(--concrete);
  font-size: 15px;
  margin-bottom: 32px;
}
.auth-container h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: -0.3px;
}
.auth-switch {
  text-align: center;
  margin-top: 16px;
  font-size: 14px;
  color: var(--concrete);
}
.auth-switch a {
  color: var(--signal);
  text-decoration: none;
  font-weight: 500;
}

/* ============ FORMS ============ */
.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--steel);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--chalk);
  border-radius: 8px;
  font-size: 15px;
  font-family: 'DM Sans', sans-serif;
  color: var(--coal);
  background: var(--white);
  transition: border-color 0.2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--signal);
  box-shadow: 0 0 0 3px var(--signal-glow);
}
.form-group textarea { min-height: 80px; resize: vertical; }
.form-group select { cursor: pointer; }
.form-error {
  color: var(--red);
  font-size: 13px;
  margin-bottom: 12px;
  min-height: 18px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.form-row-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}

/* ============ BUTTONS ============ */
.btn-primary {
  background: var(--signal);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  font-family: 'DM Sans', sans-serif;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}
.btn-primary:hover { background: #d14e1f; }
.btn-primary:active { transform: scale(0.98); }
.btn-full { width: 100%; }
.btn-secondary {
  background: var(--chalk);
  color: var(--coal);
  border: none;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
  font-family: 'DM Sans', sans-serif;
}
.btn-secondary:hover { background: var(--fog); }
.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
  border-radius: 6px;
}
.btn-danger {
  background: var(--red-soft);
  color: var(--red);
  border: none;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: 'DM Sans', sans-serif;
}
.btn-danger:hover { background: var(--red); color: white; }
.btn-success {
  background: var(--green-soft);
  color: var(--green);
  border: none;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: 'DM Sans', sans-serif;
}
.btn-success:hover { background: var(--green); color: white; }
.btn-ghost {
  background: none;
  border: 1px solid var(--chalk);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  color: var(--steel);
  font-family: 'DM Sans', sans-serif;
}
.btn-ghost:hover { border-color: var(--signal); color: var(--signal); }
.btn-group {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* ============ LAYOUT ============ */
#main-app {
  display: flex;
  min-height: 100vh;
}

/* ============ SIDEBAR ============ */
.sidebar {
  width: var(--sidebar-w);
  background: var(--coal);
  color: white;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}
.sidebar-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.5px;
  padding: 0 12px 24px;
  border-bottom: 1px solid var(--graphite);
  margin-bottom: 16px;
}
.sidebar-logo span { color: var(--signal); }
.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--fog);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.15s;
}
.nav-item:hover { background: var(--graphite); color: white; }
.nav-item.active {
  background: var(--signal);
  color: white;
}
.nav-item svg { flex-shrink: 0; }
.sidebar-footer {
  border-top: 1px solid var(--graphite);
  padding-top: 16px;
}
.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--signal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}
.user-name { font-size: 14px; font-weight: 600; }
.user-email { font-size: 12px; color: var(--concrete); }
.btn-logout {
  width: 100%;
  padding: 8px;
  background: var(--graphite);
  border: none;
  border-radius: 6px;
  color: var(--fog);
  font-size: 13px;
  cursor: pointer;
  font-family: 'DM Sans', sans-serif;
}
.btn-logout:hover { background: var(--steel); color: white; }

/* ============ MAIN ============ */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  padding: 32px 40px;
  min-height: 100vh;
  background: var(--white);
}

/* ============ PAGE HEADER ============ */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}
.page-header h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
}
.page-header p {
  color: var(--concrete);
  font-size: 15px;
  margin-top: 4px;
}

/* ============ STAT CARDS ============ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}
.stat-card {
  background: var(--white);
  border: 1px solid var(--chalk);
  border-radius: 12px;
  padding: 20px 24px;
}
.stat-card .stat-label {
  font-size: 13px;
  color: var(--concrete);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
  margin-bottom: 8px;
}
.stat-card .stat-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -1px;
}
.stat-card .stat-sub {
  font-size: 13px;
  color: var(--concrete);
  margin-top: 4px;
}
.stat-signal .stat-value { color: var(--signal); }
.stat-green .stat-value { color: var(--green); }
.stat-red .stat-value { color: var(--red); }
.stat-yellow .stat-value { color: var(--yellow); }
.stat-blue .stat-value { color: var(--blue); }

/* ============ TABLE ============ */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.data-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--concrete);
  border-bottom: 2px solid var(--chalk);
  background: var(--white);
  position: sticky;
  top: 0;
}
.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--chalk);
  vertical-align: middle;
}
.data-table tr:hover td { background: var(--signal-glow); }
.data-table .actions { white-space: nowrap; }

/* ============ BADGES ============ */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  text-transform: capitalize;
}
.badge-green { background: var(--green-soft); color: var(--green); }
.badge-yellow { background: var(--yellow-soft); color: #a16207; }
.badge-red { background: var(--red-soft); color: var(--red); }
.badge-blue { background: var(--blue-soft); color: var(--blue); }
.badge-gray { background: var(--chalk); color: var(--steel); }
.badge-signal { background: var(--signal-soft); color: var(--signal); }

/* ============ CARDS ============ */
.card {
  background: var(--white);
  border: 1px solid var(--chalk);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
}
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.card-header h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.3px;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

/* ============ MODAL ============ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(2px);
}
.modal {
  background: var(--white);
  border-radius: 16px;
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 24px 0;
}
.modal-header h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 20px;
  font-weight: 600;
}
.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: none;
  background: var(--chalk);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--steel);
}
.modal-close:hover { background: var(--fog); }
.modal-body { padding: 24px; }
.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--chalk);
}

/* ============ TOAST ============ */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  animation: slideIn 0.3s ease;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}
.toast-success { background: var(--green); color: white; }
.toast-error { background: var(--red); color: white; }
.toast-info { background: var(--coal); color: white; }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ============ EMPTY STATE ============ */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--concrete);
}
.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  color: var(--fog);
}
.empty-state h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 18px;
  color: var(--steel);
  margin-bottom: 8px;
}

/* ============ SECTION ============ */
.section { margin-bottom: 32px; }
.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}

/* ============ PROGRESS BAR ============ */
.progress-bar {
  height: 8px;
  background: var(--chalk);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 8px;
}
.progress-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s ease;
}
.progress-green { background: var(--green); }
.progress-yellow { background: var(--yellow); }
.progress-red { background: var(--red); }
.progress-signal { background: var(--signal); }

/* ============ FILTERS ============ */
.filter-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  align-items: center;
}
.filter-chip {
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--chalk);
  background: var(--white);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  color: var(--steel);
  font-family: 'DM Sans', sans-serif;
  transition: all 0.15s;
}
.filter-chip:hover { border-color: var(--signal); color: var(--signal); }
.filter-chip.active {
  background: var(--signal);
  color: white;
  border-color: var(--signal);
}

/* ============ LOADING ============ */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px;
  color: var(--concrete);
}
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--chalk);
  border-top-color: var(--signal);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-right: 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============ TIMESHEET GRID ============ */
.ts-grid {
  display: grid;
  grid-template-columns: 2fr repeat(7, 1fr) 1fr;
  gap: 1px;
  background: var(--chalk);
  border: 1px solid var(--chalk);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 16px;
}
.ts-cell {
  background: var(--white);
  padding: 10px 12px;
  font-size: 13px;
}
.ts-header {
  background: var(--chalk);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--steel);
}
.ts-cell input {
  width: 100%;
  padding: 4px 8px;
  border: 1px solid var(--chalk);
  border-radius: 4px;
  font-size: 13px;
  text-align: center;
  font-family: 'DM Sans', sans-serif;
}
.ts-cell input:focus { outline: none; border-color: var(--signal); }
.ts-total { font-weight: 600; color: var(--signal); text-align: center; }

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    position: relative;
    padding: 16px;
  }
  .sidebar-nav { flex-direction: row; overflow-x: auto; gap: 4px; }
  .nav-item { white-space: nowrap; font-size: 13px; padding: 8px 12px; }
  .main-content {
    margin-left: 0;
    padding: 20px 16px;
  }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
  .page-header { flex-direction: column; align-items: flex-start; gap: 12px; }
  .modal { max-width: 95%; margin: 16px; }
  .card-grid { grid-template-columns: 1fr; }
}