/* === Base layout & global reset === */
:root {
  --sidebar-w: 260px;
  --topbar-h: 60px;
  --navy:       #1A4D2E;
  --navy-dark:  #0A2E10;
  --blue:       #2D6A4F;
  --blue-50:    #F0FAF3;
  --blue-100:   #D8F3DC;
  --bg:         #F1F5F9;
  --surface:    #FFFFFF;
  --border:     #E2E8F0;
  --text:       #1E293B;
  --muted:      #64748B;
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  14px;
  --shadow-xs:  0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.10);
}

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

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

body {
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* App layout */
.app {
  display: flex;
  flex-direction: row;
  min-height: 100dvh;
  width: 100%;
}

.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  height: 100dvh;
  overflow-y: auto;
  z-index: 100;
}

.content {
  margin-left: var(--sidebar-w);
  min-height: 100dvh;
  display: block;
  flex: 1;
  overflow-x: hidden;
}

.content .page {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 3rem;
}

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

.card-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0.875rem 1.25rem;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text);
}

.card-body {
  padding: 1.25rem;
}

/* Tables */
.table {
  border-collapse: collapse;
}

.table thead th {
  background: #F8FAFC;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1rem;
  white-space: nowrap;
}

.table tbody td {
  vertical-align: middle;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  border-bottom: 1px solid #F8FAFC;
}

.table tbody tr:hover td {
  background: #F8FAFC;
}

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

/* Forms */
.form-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.375rem;
}

.form-control, .form-select {
  border-color: var(--border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
  padding: 0.5rem 0.875rem;
}

.form-control:focus, .form-select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
  outline: none;
}

/* Buttons */
.btn {
  font-weight: 500;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  transition: all 0.15s;
}

.btn-primary {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}

.btn-primary:hover {
  background: #1D4ED8;
  border-color: #1D4ED8;
}

.btn-outline-primary {
  border-color: var(--blue);
  color: var(--blue);
}

.btn-outline-primary:hover {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}

.btn-soft {
  background: var(--blue-50);
  color: var(--blue);
  border: 1px solid var(--blue-100);
}

.btn-soft:hover {
  background: var(--blue-100);
  color: var(--blue);
}

/* Badges */
.badge {
  font-weight: 500;
  border-radius: 5px;
  font-size: 0.72rem;
  padding: 0.3em 0.6em;
}

/* Alerts */
.alert {
  border-radius: var(--radius-md);
  font-size: 0.875rem;
}

/* Helpers */
.text-muted { color: var(--muted) !important; }
.form-required::after { content: " *"; color: #DC2626; }

/* Navbar brand */
.navbar-brand { letter-spacing: 0.01em; }