:root {
  --sidebar-width: 250px;
  --sidebar-bg: #0f0f1a;
  --sidebar-hover: #1a1a30;
  --sidebar-active: #1a237e;
  --topbar-height: 64px;
  --primary: #1a237e;
  --primary-light: #e8eaf6;
  --primary-soft: #eef0ff;
  --secondary: #2979ff;
  --accent: #00bcd4;
  --surface: #f5f6fa;
  --card-border: #eef0f4;
  --text-primary: #1a1a2e;
  --text-secondary: #6b7280;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.05), 0 1px 3px rgba(0,0,0,0.04);
  --transition: 0.2s ease;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--surface);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}

.app-wrapper {
  display: flex;
  min-height: 100vh;
}

/* ---- Sidebar ---- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--sidebar-bg);
  color: #fff;
  display: flex;
  flex-direction: column;
  z-index: 1040;
  transition: transform var(--transition);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 20px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.brand-icon {
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.brand-sub {
  font-size: 11px;
  color: rgba(255,255,255,0.5);
  font-weight: 400;
  letter-spacing: 0.2px;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 8px;
  overflow-y: auto;
}

.sidebar-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-nav li a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  margin-bottom: 2px;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition);
}

.sidebar-nav li a i { font-size: 18px; width: 22px; text-align: center; }

.sidebar-nav li a:hover {
  background: var(--sidebar-hover);
  color: #fff;
}

.sidebar-nav li.active a {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.sidebar-version {
  font-size: 11px;
  color: rgba(255,255,255,0.3);
}

/* ---- Main Content ---- */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  height: var(--topbar-height);
  padding: 0 32px;
  background: #fff;
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 1020;
}

.topbar-title h1 {
  font-size: 18px;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.3px;
}

.sidebar-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-primary);
  cursor: pointer;
  padding: 4px;
}

.topbar-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-primary-soft {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
}

.content-container {
  padding: 28px 32px;
  flex: 1;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 1035;
}

/* ---- Cards ---- */
.card {
  border: none;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: #fff;
}

.card-header {
  background: transparent;
  border-bottom: 1px solid var(--card-border);
  padding: 16px 20px;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
}

.card-body { padding: 20px; }

/* ---- Stat Cards ---- */
.stat-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: #fff;
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition);
}

.stat-card:hover { box-shadow: var(--shadow-md); }

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon i { font-size: 22px; color: #fff; }

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.5px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 400;
}

/* ---- Table ---- */
.table {
  font-size: 13px;
}

.table thead th {
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  border-bottom: 2px solid var(--card-border);
  padding: 12px 16px;
  background: #fafbfc;
}

.table td { padding: 12px 16px; vertical-align: middle; }

.table-hover tbody tr:hover { background: #f8f9ff; }

.avatar-initial {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  flex-shrink: 0;
}

/* ---- Buttons ---- */
.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  font-weight: 500;
}

.btn-primary:hover {
  background: #151b6b;
  border-color: #151b6b;
}

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

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

.btn-primary-soft {
  background: var(--primary-soft);
  color: var(--primary);
  border: none;
  font-weight: 500;
}

.btn-primary-soft:hover {
  background: #dde0ff;
  color: var(--primary);
}

.btn-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
}

.btn-ghost {
  background: transparent;
  border: none;
  color: var(--text-secondary);
}

.btn-ghost:hover { background: #f0f0f5; color: var(--text-primary); }

/* ---- Form ---- */
.form-control, .form-select {
  font-size: 14px;
  border-radius: var(--radius-sm);
  border-color: #e0e0e8;
  padding: 8px 14px;
}

.form-control:focus, .form-select:focus {
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(41,121,255,0.1);
}

.form-control-color {
  padding: 4px;
  height: 40px;
  cursor: pointer;
}

textarea.form-control { font-size: 13px; }

.form-label { font-size: 13px; font-weight: 500; margin-bottom: 4px; color: var(--text-primary); }

/* ---- Empty State ---- */
.empty-state { color: var(--text-secondary); }
.empty-state i { opacity: 0.4; }

/* ---- Signature Preview ---- */
.signature-preview-container {
  background: #fff;
  padding: 32px 24px;
  min-height: 200px;
  overflow-x: auto;
}

.signature-preview-container.dark-preview {
  background: #1e1e2f;
}

.preview-iframe-wrapper {
  max-width: 600px;
  margin: 0 auto;
}

/* ---- Logo Preview ---- */
.logo-preview img {
  object-fit: contain;
}

/* ---- Small helpers ---- */
.fw-medium { font-weight: 500; }

/* ---- Responsive ---- */
@media (max-width: 991.98px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar.open ~ .sidebar-overlay {
    display: block;
  }

  .main-content {
    margin-left: 0;
  }

  .sidebar-toggle {
    display: block;
  }

  .topbar { padding: 0 16px; }
  .content-container { padding: 20px 16px; }
}

@media (max-width: 575.98px) {
  .stat-card { padding: 16px; }
  .stat-value { font-size: 20px; }
}

/* ---- Login ---- */
.login-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(41,121,255,0.16), transparent 32rem),
    linear-gradient(135deg, #eef0ff 0%, #f8fafc 45%, #ffffff 100%);
}

.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  width: min(100%, 420px);
  padding: 32px;
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 24px 60px rgba(15, 15, 26, 0.12);
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.login-brand-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  font-size: 24px;
  font-weight: 700;
}

.login-brand h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
}

.login-brand p {
  margin: 2px 0 0;
  color: var(--text-secondary);
  font-size: 13px;
}