/* ============================================================
   APP SHELL — Sidebar + Header + Main Content
   ============================================================ */

.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: var(--header-height) 1fr;
  grid-template-areas:
    "sidebar header"
    "sidebar main";
  min-height: 100vh;
  transition: grid-template-columns var(--transition-slow);
}

.app-shell.sidebar-collapsed {
  grid-template-columns: var(--sidebar-collapsed-width) 1fr;
}

/* ---- SIDEBAR ---- */
.sidebar {
  grid-area: sidebar;
  background: var(--color-primary-dark);
  color: var(--color-text-inverse);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  z-index: var(--z-sidebar);
  transition: width var(--transition-slow);
  overflow: hidden;
}

.sidebar-collapsed .sidebar {
  width: var(--sidebar-collapsed-width);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  height: var(--header-height);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  flex-shrink: 0;
}

.sidebar-brand-logo {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

.sidebar-brand-text {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  white-space: nowrap;
}

.sidebar-brand-name {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  letter-spacing: -0.01em;
}

.sidebar-brand-sub {
  font-size: var(--font-size-xs);
  opacity: 0.6;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-4) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  overflow-y: auto;
}

.sidebar-section-label {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.4;
  padding: var(--space-4) var(--space-3) var(--space-2);
  white-space: nowrap;
  overflow: hidden;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  white-space: nowrap;
  color: rgba(255,255,255,0.7);
}

.sidebar-item:hover {
  background: rgba(255,255,255,0.08);
  color: #fff;
}

.sidebar-item.active {
  background: rgba(255,255,255,0.12);
  color: #fff;
}

.sidebar-item.active::before {
  content: '';
  position: absolute;
  left: -12px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--color-accent);
  border-radius: 0 var(--radius-full) var(--radius-full) 0;
}

.sidebar-item-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: var(--font-size-lg);
}

.sidebar-item-label {
  flex: 1;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  overflow: hidden;
}

.sidebar-item-badge {
  background: var(--color-danger);
  color: #fff;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  padding: 1px 6px;
  border-radius: var(--radius-full);
  min-width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-item-badge.warning { background: var(--color-warning); color: var(--color-text); }

.sidebar-footer {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: var(--space-3);
  flex-shrink: 0;
}

.sidebar-collapse-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: rgba(255,255,255,0.5);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.sidebar-collapse-btn:hover { color: #fff; background: rgba(255,255,255,0.06); }

/* Collapsed sidebar hides labels */
.sidebar-collapsed .sidebar-brand-text,
.sidebar-collapsed .sidebar-item-label,
.sidebar-collapsed .sidebar-item-badge,
.sidebar-collapsed .sidebar-section-label,
.sidebar-collapsed .sidebar-collapse-btn span { display: none; }

.sidebar-collapsed .sidebar-item { justify-content: center; padding: var(--space-3); }
.sidebar-collapsed .sidebar-brand { justify-content: center; padding: var(--space-4) var(--space-2); }
.sidebar-collapsed .sidebar-nav { padding: var(--space-4) var(--space-2); }

/* ---- HEADER ---- */
.header {
  grid-area: header;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  gap: var(--space-4);
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  height: var(--header-height);
}

.header-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  flex-shrink: 0;
}

.header-breadcrumb-separator { opacity: 0.4; }
.header-breadcrumb a:hover { color: var(--color-accent); }
.header-breadcrumb-current { color: var(--color-text); font-weight: var(--font-weight-medium); }

.header-spacer { flex: 1; }

.header-company-selector {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--color-surface);
  position: relative;
}

.header-company-selector:hover { border-color: var(--color-accent); }

.header-company-selector .company-dot {
  width: 8px; height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.header-action-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  position: relative;
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
}

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

.header-action-btn .notification-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  background: var(--color-danger);
  border-radius: var(--radius-full);
  border: 2px solid var(--color-surface);
}

.header-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.header-user:hover { background: var(--color-surface-hover); }

.header-user-info {
  text-align: right;
}

.header-user-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.header-user-role {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ---- MAIN CONTENT ---- */
.main-content {
  grid-area: main;
  padding: var(--space-6);
  overflow-y: auto;
  min-height: calc(100vh - var(--header-height));
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  gap: var(--space-4);
}

.page-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
}

.page-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

.page-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ---- DROPDOWNS ---- */
.dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-dropdown);
  min-width: 200px;
  overflow: hidden;
  animation: dropdown-in var(--transition-fast);
}

.dropdown.right { right: 0; }
.dropdown.left { left: 0; }

@keyframes dropdown-in {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.dropdown-item:hover { background: var(--color-surface-hover); }
.dropdown-item.active { background: var(--color-accent); color: #fff; }
.dropdown-item.danger { color: var(--color-danger); }
.dropdown-divider { height: 1px; background: var(--color-border); margin: var(--space-1) 0; }

/* ---- LOGIN PAGE ---- */
.login-page {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  min-height: 100vh;
}

.login-hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-16);
  position: relative;
  overflow: hidden;
}

.login-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(0,165,224,0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0,165,224,0.1) 0%, transparent 50%);
}

.login-hero-content {
  position: relative;
  text-align: center;
  color: #fff;
}

.login-hero-logo {
  width: 80px;
  height: 80px;
  background: rgba(255,255,255,0.12);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-8);
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.15);
}

.login-hero-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.login-hero-subtitle {
  font-size: var(--font-size-lg);
  opacity: 0.8;
  margin-bottom: var(--space-8);
  max-width: 400px;
}

.login-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.12);
}

.login-form-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-16);
  background: var(--color-surface);
}

.login-form-container {
  width: 100%;
  max-width: 380px;
}

.login-form-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.login-form-brand {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.login-form-brand-dot {
  width: 6px; height: 6px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
}

.login-form-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-2);
}

.login-form-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

.form-input {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
}

.form-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0,165,224,0.1);
}

.form-input.error { border-color: var(--color-danger); }

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-danger);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  line-height: 1;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-light); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-accent {
  background: var(--color-accent);
  color: #fff;
}
.btn-accent:hover { background: var(--color-accent-dark); }

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

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

.btn-danger { background: var(--color-danger); color: #fff; }
.btn-danger:hover { background: #DC2626; }

.btn-sm { padding: var(--space-2) var(--space-3); font-size: var(--font-size-xs); }
.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--font-size-base); }

.btn-full { width: 100%; }

.btn .spinner {
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: var(--radius-full);
  animation: spin 0.6s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.login-form-footer {
  text-align: center;
  margin-top: var(--space-6);
}

.login-form-footer a {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  cursor: default;
}

.login-form-powered {
  text-align: center;
  margin-top: var(--space-12);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}