:root {
  --bg-page: #eff2fb;
  --bg-panel: #ffffff;
  --bg-surface: #f8fafc;
  --text-primary: #0f172a;
  --text-muted: #64748b;
  --border: #d1d5db;
  --primary: #2563eb;
  --primary-strong: #1d4ed8;
  --primary-dark: #1d4ed8;
  --success: #16a34a;
  --success-dark: #15803d;
  --warning: #f59e0b;
  --warning-dark: #d97706;
  --danger: #ef4444;
  --danger-dark: #b91c1c;
  --btn-height: 44px;
  --btn-radius: 12px;
  --btn-shadow: 0 12px 24px rgba(37, 99, 235, 0.18);
  --shadow-soft: 0 24px 60px rgba(15, 23, 42, 0.08);
  --shadow-card: 0 14px 40px rgba(15, 23, 42, 0.06);

  /* Calculator-card tokens moved here from calculator-card.css for centralization */
  --cc-card-bg: var(--bg-panel, #ffffff);
  --cc-card-border: var(--border, #e6eaf0);
  --cc-card-shadow: var(--shadow-card, 0 12px 35px rgba(15,23,42,.08));
  --cc-card-shadow-hover: 0 20px 45px rgba(15,23,42,.15);
  --cc-primary: var(--primary, #2563eb);
  --cc-primary-dark: var(--primary-strong, #1d4ed8);
  --cc-primary-light: #eff6ff;
  --cc-text: var(--text-primary, #475569);
  --cc-heading: var(--text-primary, #0f172a);
  --cc-muted: var(--text-muted, #94a3b8);
  --cc-success: var(--success, #16a34a);
  --cc-danger: var(--danger, #dc2626);
  --cc-radius: 18px;
  --heading: var(--text-primary, #0f172a);
  --text: var(--text-muted, #64748b);
  --radius-lg: 20px;
  --shadow: 0 14px 40px rgba(15, 23, 42, 0.06);
  --shadow-sm: 0 8px 18px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.12);
}

body[data-theme="dark"] {
  --bg-page: #07101f;
  --bg-panel: #111827;
  --bg-surface: #0f172a;
  --text-primary: #f8fafc;
  --text-muted: #94a3b8;
  --border: #334155;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: 'Inter', sans-serif;
  background: var(--bg-page);
  color: var(--text-primary);
}

a {
  color: var(--primary);
}

a:hover,
.breadcrumb-link:hover,
.btn-link:hover {
  color: var(--primary-strong);
  text-decoration: none;
}

button,
.btn,
input,
select,
textarea {
  transition: all 0.18s ease;
}

img,
svg {
  max-width: 100%;
}

.app-shell {
  min-height: 100vh;
}

.topbar {
  background: var(--bg-panel);
  border-bottom: 1px solid rgba(148, 163, 184, 0.16);
  position: sticky;
  top: 0;
  z-index: 1030;
  display: flex; /* enforce flex layout so left and right groups align correctly */
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1rem;
}

.topbar .navbar-brand {
  color: var(--text-primary);
}

.topbar .navbar-brand:hover {
  color: var(--primary-strong);
}

.topbar .btn-icon {
  position: relative; /* anchor any notification badge inside */
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.16);
  background: var(--bg-panel);
  color: #475569;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.topbar .btn-icon:hover,
.topbar .btn-icon:focus {
  background: var(--bg-surface);
  color: var(--primary-strong);
}

.sidebar-toggle {
  display: none;
}

.topbar .search-bar {
  max-width: 640px;
}

.topbar .search-bar .form-control {
  border-radius: 999px;
  padding: 0.95rem 1.2rem;
  border: 1px solid rgba(148, 163, 184, 0.2);
  box-shadow: var(--shadow-soft);
  min-height: 3.5rem;
}

.topbar .search-bar .form-control:focus {
  border-color: rgba(37, 99, 235, 0.45);
  box-shadow: 0 0 0 0.15rem rgba(59, 130, 246, 0.14);
}

.topbar .input-group-text {
  background: var(--bg-panel);
  border: none;
  color: var(--text-muted);
}

.topbar-actions {
  align-items: center;
  gap: 14px; /* consistent spacing between items (12-16px) */
  min-width: 0; /* allow the container to shrink and prevent overflow */
  flex: 0 0 auto; /* prevent actions group from shrinking too aggressively */
}

.topbar-actions > * {
  min-width: 0; /* protect children from overflowing/flexing unexpectedly */
}

.badge-notification {
  position: absolute; /* positioned relative to .btn-icon */
  top: 6px;
  right: 6px;
  width: 18px;
  height: 18px;
  border-radius: 999px;
  font-size: 0.65rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--danger);
  color: #ffffff;
  line-height: 1; /* ensure consistent centering */
}

.profile-avatar {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #ffffff;
  font-weight: 700;
  flex: 0 0 auto; /* prevent shrinking or growing */
}

/* Profile trigger: align avatar and text horizontally with spacing */
.profile-trigger {
  display: inline-flex;
  align-items: center;
  gap: 12px; /* spacing between avatar and user text */
  padding: 6px 8px;
  border-radius: 12px;
  background: transparent;
  border: none;
}

/* Ensure user text won't overlap and will ellipsis on overflow */
.profile-info {
  min-width: 0; /* allow flex child to shrink */
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.profile-info .fw-semibold,
.profile-info small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.profile-info span,
.profile-info small {
  display: block;
}

.breadcrumb-strip {
  background: var(--bg-panel);
  border-bottom: 1px solid rgba(148, 163, 184, 0.16);
  color: #475569;
}

.breadcrumb-strip .breadcrumb-link {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.breadcrumb-strip .breadcrumb-separator {
  margin: 0 0.75rem;
}

.breadcrumb-strip .breadcrumb-current {
  font-weight: 600;
}

.app-body {
  min-height: calc(100vh - 72px);
  background: var(--bg-page);
  display: flex; /* ensure sidebar and main align vertically */
  align-items: stretch;
}

.app-sidebar-col {
  width: 280px;
  transition: width 0.25s ease;
  flex: 0 0 280px; /* fixed-width sidebar that doesn't shrink by default */
}

body.sidebar-collapsed .app-sidebar-col {
  width: 0;
  flex: 0 0 0;
}

/* Main content should flex and prevent overflow so Bootstrap grid works reliably */
.main-content {
  flex: 1 1 auto;
  min-width: 0; /* allow flex children to shrink and prevent overflow issues in nested grids */
}

/* Ensure outer container inside app-body doesn't add unwanted gutters between sidebar and main */
.app-body > .container-fluid {
  padding-left: 0;
  padding-right: 0;
}

/* Ensure the inner container inside main does not add unexpected side gutters */
.main-content > .container-fluid {
  padding-left: 1rem;
  padding-right: 1rem;
}

/* Mobile: collapse sidebar and expose toggle (small screens) */

/* On large screens keep the sidebar and main on the same flex line (prevent unwanted wrapping that stacks main under the sidebar) */
@media (min-width: 992px) {
  .app-body > .container-fluid > .row {
    flex-wrap: nowrap; /* keep aside + main on one row */
  }
}

@media (max-width: 991.98px) {
  .app-sidebar-col {
    width: 0;
    flex: 0 0 0;
  }
  .sidebar {
    transform: translateX(-100%);
    position: fixed;
    left: 0;
    top: 72px;
    height: calc(100vh - 72px);
    z-index: 1050;
    transition: transform 0.25s ease;
  }
  body.sidebar-open .sidebar {
    transform: translateX(0);
  }
  .sidebar-toggle {
    display: inline-flex !important;
  }
}

body.sidebar-collapsed .sidebar {
  transform: translateX(-100%) !important;
  opacity: 0;
  pointer-events: none;
}

.sidebar {
  min-height: calc(100vh - 72px);
  background: linear-gradient(180deg, #0b1730 0%, #15264f 100%);
  color: #e2e8f0;
  padding: 1.75rem 1.2rem;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
}

.sidebar-brand {
  display: flex;
  gap: 0.95rem;
  align-items: flex-start;
  margin-bottom: 2rem;
}

.brand-mark {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: grid;
  place-items: center;
  font-weight: 700;
  color: #ffffff;
}

.brand-name {
  font-weight: 700;
  font-size: 1rem;
  color: #ffffff;
}

.brand-subtitle {
  font-size: 0.9rem;
  color: rgba(226, 232, 240, 0.88);
}

.sidebar-section {
  margin-bottom: 1.8rem;
}

.sidebar-section-title {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  color: #94a3b8;
  margin-bottom: 1rem;
}

.sidebar-nav .nav-link {
  color: rgba(226, 232, 240, 0.88);
  border-radius: 14px;
  padding: 0.9rem 1rem;
  margin-bottom: 0.4rem;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
}

.sidebar-nav .nav-link i {
  font-size: 1.08rem;
}

.sidebar-nav .nav-link:hover,
.sidebar-nav .nav-link.active {
  color: #ffffff;
  background: rgba(37, 99, 235, 0.16);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.sidebar-footer {
  margin-top: 2rem;
}

.btn-logout {
  border-radius: 14px;
  padding: 0.95rem 1rem;
  background: #2563eb;
  border: none;
  font-weight: 600;
}

.btn-logout:hover,
.btn-logout:focus {
  background: #1d4ed8;
}

.auth-card,
.panel,
.filters-card {
  border-radius: 1.5rem;
  border: none;
  background: var(--bg-panel);
  box-shadow: var(--shadow-card);
}

.card {
  overflow: hidden;
}

.card-header {
  background: transparent;
  border-bottom: none;
  padding-bottom: 1rem;
}

.card-body {
  padding: 1.6rem;
}

.form-control,
.form-select,
textarea {
  border-radius: 1rem;
  border: 1px solid var(--border);
}

.form-control:focus,
.form-select:focus,
textarea:focus {
  border-color: rgba(37, 99, 235, 0.45);
  box-shadow: 0 0 0 0.18rem rgba(59, 130, 246, 0.14);
}

button:disabled,
.btn:disabled {
  opacity: 0.72;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.btn {
  min-height: var(--btn-height);
  height: var(--btn-height);
  padding: 0.72rem 1.15rem;
  border-radius: var(--btn-radius);
  font-weight: 700;
  letter-spacing: 0.01em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  box-shadow: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.btn:hover,
.btn:focus {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border: 1px solid transparent;
  color: #ffffff;
  box-shadow: var(--btn-shadow);
}

.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  border-color: transparent;
  color: #ffffff;
}

.btn-secondary,
.btn-outline-primary,
.btn-outline-secondary {
  background: #ffffff;
  border: 1px solid rgba(37, 99, 235, 0.35);
  color: var(--primary);
  box-shadow: none;
}

.btn-secondary:hover,
.btn-outline-primary:hover,
.btn-outline-secondary:hover,
.btn-secondary:focus,
.btn-outline-primary:focus,
.btn-outline-secondary:focus {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-color: transparent;
  color: #ffffff;
}

.btn-success {
  background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
  border: 1px solid transparent;
  color: #ffffff;
  box-shadow: 0 10px 22px rgba(22, 163, 74, 0.2);
}

.btn-success:hover,
.btn-success:focus,
.btn-success:active {
  background: linear-gradient(135deg, var(--success-dark) 0%, var(--success) 100%);
  border-color: transparent;
  color: #ffffff;
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger) 0%, var(--danger-dark) 100%);
  border: 1px solid transparent;
  color: #ffffff;
  box-shadow: 0 10px 22px rgba(220, 38, 38, 0.2);
}

.btn-danger:hover,
.btn-danger:focus,
.btn-danger:active {
  background: linear-gradient(135deg, var(--danger-dark) 0%, var(--danger) 100%);
  border-color: transparent;
  color: #ffffff;
}

.btn-warning {
  background: linear-gradient(135deg, var(--warning) 0%, var(--warning-dark) 100%);
  border: 1px solid transparent;
  color: #ffffff;
  box-shadow: 0 10px 22px rgba(245, 158, 11, 0.22);
}

.btn-warning:hover,
.btn-warning:focus,
.btn-warning:active {
  background: linear-gradient(135deg, var(--warning-dark) 0%, var(--warning) 100%);
  border-color: transparent;
  color: #ffffff;
}

.btn-info {
  background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
  border: 1px solid transparent;
  color: #ffffff;
}

.btn-info:hover,
.btn-info:focus,
.btn-info:active {
  background: linear-gradient(135deg, #0284c7 0%, #0ea5e9 100%);
  border-color: transparent;
  color: #ffffff;
}

.btn-link {
  min-height: auto;
  height: auto;
  padding: 0.35rem 0.55rem;
  border: none;
  background: transparent;
  color: var(--primary);
  box-shadow: none;
}

.btn-link:hover,
.btn-link:focus {
  transform: none;
  color: var(--primary-dark);
  text-decoration: underline;
}

.btn-icon,
.profile-trigger,
.btn-logout {
  width: var(--btn-icon-size);
  min-width: var(--btn-icon-size);
  height: var(--btn-icon-size);
  padding: 0;
  border-radius: var(--btn-radius);
  background: #ffffff;
  border: 1px solid var(--border);
  color: var(--heading);
}

.btn-icon:hover,
.profile-trigger:hover,
.btn-logout:hover,
.btn-icon:focus,
.profile-trigger:focus,
.btn-logout:focus {
  background: rgba(37, 99, 235, 0.08);
  border-color: rgba(37, 99, 235, 0.35);
  color: var(--primary);
  transform: translateY(-1px);
}

.btn-logout {
  width: 100%;
  min-width: 100%;
}

.btn.is-loading {
  position: relative;
  pointer-events: none;
  color: transparent;
}

.btn.is-loading::after {
  content: "";
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(255, 255, 255, 0.6);
  border-top-color: #ffffff;
  border-radius: 50%;
  position: absolute;
  animation: spin 0.75s linear infinite;
}

.btn-secondary.is-loading::after,
.btn-outline-primary.is-loading,
.btn-outline-secondary.is-loading {
  border-color: rgba(37, 99, 235, 0.35);
  border-top-color: var(--primary);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.dashboard-search {
  margin-bottom: 1.5rem;
}

.dashboard-search .form-control {
  border-radius: 1rem;
  padding: 1rem 1.2rem;
  border: 1px solid rgba(15, 23, 42, 0.12);
}

.dashboard-search .form-control:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.15);
}

.dashboard-hero {
  padding: 1.7rem;
  border-radius: 1.5rem;
  background: linear-gradient(135deg, #1d4ed8 0%, #2563eb 100%);
  color: #ffffff;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.16);
}

.dashboard-hero h1,
.dashboard-hero h2,
.dashboard-hero h3 {
  color: #ffffff;
}

.dashboard-hero p {
  color: rgba(255, 255, 255, 0.88);
}

.table {
  background: var(--bg-panel);
  border-radius: 1.25rem;
  overflow: hidden;
}

.table thead th {
  background: var(--bg-surface);
  color: var(--text-primary);
  border-bottom: 1px solid rgba(148, 163, 184, 0.25);
  position: sticky;
  top: 0;
  z-index: 1;
}

.table-hover tbody tr:hover {
  background: rgba(37, 99, 235, 0.06);
}

.table td,
.table th {
  vertical-align: middle;
}

.table-search-empty {
  padding: 2rem;
  text-align: center;
  color: var(--text-muted);
  border-top: 1px solid rgba(148, 163, 184, 0.2);
  font-size: 0.95rem;
}

.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, #eef2ff 0%, #f8fafc 100%);
  padding: 2rem 1rem;
}

.auth-shell {
  width: min(100%, 520px);
}

.auth-card {
  background: var(--bg-panel);
  border-radius: 28px;
  box-shadow: var(--shadow-card);
  padding: 2.2rem;
  border: 1px solid rgba(15, 23, 42, 0.06);
}

.brand-badge {
  width: 72px;
  height: 72px;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: #fff;
  border-radius: 18px;
  font-size: 1.6rem;
}

.auth-title {
  font-size: 1.95rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  text-align: center;
}

.auth-subtitle {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  text-align: center;
}

.auth-btn {
  min-height: 3.75rem;
  font-weight: 600;
}

.auth-link {
  color: var(--primary);
}

.auth-link:hover {
  color: var(--primary-strong);
}

.assistant-shell {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 1.5rem;
  min-height: calc(100vh - 88px);
  padding: 1rem 0;
}

.assistant-sidebar,
.assistant-input-card,
.assistant-header,
.assistant-messages {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 1.5rem;
  box-shadow: var(--shadow-card);
}

.assistant-sidebar {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.assistant-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

.assistant-item {
  border-radius: 1rem;
  padding: 0.95rem 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.assistant-item:hover,
.assistant-item.active {
  background: rgba(37, 99, 235, 0.12);
  box-shadow: 0 14px 30px rgba(15, 23, 42, 0.08);
}

.assistant-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--text-primary);
  border: 1px solid rgba(37, 99, 235, 0.14);
  transition: background 0.2s ease, transform 0.2s ease;
}

.assistant-chip:hover {
  background: rgba(37, 99, 235, 0.16);
  transform: translateY(-1px);
}

.assistant-main {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.assistant-header {
  padding: 1.5rem;
}

.assistant-header h4 {
  margin-bottom: 0.35rem;
}

.assistant-header p {
  color: var(--text-muted);
  margin: 0;
}

.assistant-messages {
  padding: 1.25rem;
  min-height: 420px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  overflow-y: auto;
}

.assistant-empty {
  min-height: 260px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  text-align: center;
  gap: 0.85rem;
}

.assistant-empty i {
  font-size: 3rem;
  color: rgba(37, 99, 235, 0.3);
}

.assistant-input-card {
  padding: 1.5rem;
}

.assistant-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.assistant-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
}

.assistant-form textarea {
  min-height: 120px;
  resize: vertical;
  border-radius: 1rem;
  border: 1px solid var(--border);
  padding: 1rem;
  background: var(--bg-surface);
}

.assistant-file-uploader {
  margin-top: 1rem;
  padding: 1.2rem;
  border: 1px dashed var(--border);
  border-radius: 1.25rem;
  text-align: center;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.assistant-file-uploader:hover {
  background: rgba(37, 99, 235, 0.04);
  border-color: rgba(37, 99, 235, 0.35);
}

.assistant-file-uploader input {
  display: none;
}

.page-header-section {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 0.25rem 0 1rem;
  margin-bottom: 1rem;
}

.page-kicker {
  display: inline-block;
  margin-bottom: 0.5rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  font-weight: 700;
}

.page-header-section h1,
.page-header-section h2,
.page-header-section h3 {
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.page-header-section p {
  margin: 0.35rem 0 0;
  color: var(--text-muted);
}

.page-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.section-card {
  background: var(--bg-panel);
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 1.5rem;
  box-shadow: var(--shadow-card);
}

.settings-shell {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.settings-sidebar {
  background: var(--bg-panel);
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 1.5rem;
  box-shadow: var(--shadow-card);
  padding: 1rem;
}

.settings-nav {
  display: grid;
  gap: 0.5rem;
}

.settings-nav .nav-link {
  border-radius: 0.9rem;
  padding: 0.75rem 0.9rem;
  color: var(--text-primary);
  font-weight: 500;
}

.settings-nav .nav-link.active {
  background: rgba(37, 99, 235, 0.09);
  color: var(--primary);
}

.settings-content {
  display: grid;
  gap: 1.5rem;
}

.settings-panel {
  padding: 1.5rem;
}

.settings-panel .card-title {
  margin-bottom: 1.25rem;
  font-weight: 700;
}

.upload-panel {
  background: var(--bg-panel);
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 1.75rem;
  box-shadow: var(--shadow-card);
  padding: 1.75rem;
}

.upload-dropzone {
  display: grid;
  place-items: center;
  min-height: 260px;
  border: 1.5px dashed rgba(37, 99, 235, 0.4);
  border-radius: 1.5rem;
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.02), rgba(37, 99, 235, 0.06));
  padding: 1.5rem;
  text-align: center;
  color: var(--text-muted);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.upload-dropzone:hover {
  background: rgba(37, 99, 235, 0.04);
  border-color: rgba(37, 99, 235, 0.55);
  transform: translateY(-1px);
}

.upload-dropzone .upload-icon {
  width: 72px;
  height: 72px;
  border-radius: 1.25rem;
  display: grid;
  place-items: center;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  font-size: 2rem;
  margin-bottom: 1rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.project-card {
  background: var(--bg-panel);
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 1.5rem;
  box-shadow: var(--shadow-card);
  padding: 1.25rem;
}

.project-card-header {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1rem;
}

.project-progress {
  height: 0.55rem;
  background: rgba(148, 163, 184, 0.18);
  border-radius: 999px;
  overflow: hidden;
}

.project-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #2563eb 0%, #60a5fa 100%);
  border-radius: 999px;
}

@media (max-width: 991px) {
  .assistant-shell {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .assistant-controls {
    grid-template-columns: 1fr;
  }
  .assistant-form {
    grid-template-columns: 1fr;
  }
  .settings-shell {
    grid-template-columns: 1fr;
  }
  .page-header-section {
    flex-direction: column;
    align-items: flex-start;
  }
}

.required {
  color: #dc2626;
}

.field-error {
  color: #dc2626;
  font-size: 0.88rem;
  margin-top: 0.35rem;
  display: none;
}

input.is-invalid,
.form-control.is-invalid,
.form-select.is-invalid {
  border-color: #dc2626 !important;
  box-shadow: 0 0 0 0.12rem rgba(220, 38, 38, 0.15) !important;
}

button:hover,
.btn:hover {
  opacity: 0.98;
}

button:focus-visible,
.btn:focus-visible,
.form-control:focus-visible,
.form-select:focus-visible,
textarea:focus-visible {
  outline: 2px solid rgba(37, 99, 235, 0.4);
  outline-offset: 2px;
}

@media (max-width: 1199px) {
  .topbar .search-bar {
    display: none !important;
  }
}

@media (max-width: 991px) {
  .sidebar-toggle {
    display: inline-flex;
  }

  .app-sidebar-col {
    width: 0;
  }

  .sidebar {
    position: fixed;
    left: 0;
    top: 72px;
    bottom: 0;
    width: 280px;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    z-index: 1050;
  }

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

  .main-content {
    min-height: auto;
    padding: 1.5rem 1rem 2rem;
  }

  .breadcrumb-strip {
    display: none;
  }
}

@media (max-width: 767px) {
  .sidebar {
    width: 100%;
  }

  .topbar {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .topbar .profile-info {
    display: none !important;
  }

  .topbar-actions {
    gap: 0.5rem;
  }

  .app-body {
    padding-top: 0;
  }
}

/* Mobile friendly interactions and responsive fixes */
.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  z-index: 1040;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  pointer-events: none;
}

body.sidebar-open .sidebar-backdrop {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

body.sidebar-open .sidebar {
  transform: translateX(0) !important;
}

.app-body {
  overflow-x: hidden;
}

.main-content,
.app-body,
.sidebar,
.sidebar-backdrop,
.modal,
.modal-dialog,
.modal-content {
  -webkit-tap-highlight-color: transparent;
}

button,
.btn,
.btn-icon,
.form-control,
.form-select,
textarea,
input[type="text"],
input[type="search"],
input[type="email"],
input[type="url"],
input[type="tel"],
input[type="number"],
input[type="file"],
label {
  touch-action: manipulation;
}

.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table-responsive table {
  min-width: 100%;
}

.modal-dialog {
  max-width: 100%;
  margin: 1rem;
}

.modal-content {
  max-height: calc(100vh - 2rem);
  overflow: hidden;
}

.modal-body {
  max-height: calc(100vh - 14rem);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

@media (max-width: 991.98px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 72px;
    bottom: 0;
    width: min(320px, 100%);
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    z-index: 1050;
    padding: 1.5rem 1rem;
  }

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

  .sidebar-nav .nav-link,
  .sidebar-footer .btn {
    min-height: 52px;
    padding: 0.95rem 1rem;
  }

  .sidebar-footer {
    padding-bottom: 2rem;
  }

  .topbar .btn-icon,
  .sidebar-toggle,
  .btn,
  .form-control,
  .form-select,
  textarea {
    min-height: 48px;
  }

  .topbar .btn-icon {
    width: 48px;
    height: 48px;
  }

  .page-header-section {
    flex-direction: column;
    align-items: stretch;
  }

  .main-content {
    min-width: 0;
  }

  .upload-panel,
  .calculator-panel,
  .calculator-result-card,
  .section-card,
  .settings-sidebar,
  .settings-content,
  .assistant-sidebar,
  .assistant-input-card,
  .assistant-messages,
  .assistant-header {
    width: 100%;
  }

  .upload-dropzone {
    min-height: 220px;
    padding: 1.25rem;
  }

  .upload-dropzone .upload-icon {
    width: 60px;
    height: 60px;
    font-size: 1.8rem;
  }

  .page-header h1 {
    font-size: 1.8rem;
  }

  .page-actions {
    justify-content: flex-start;
  }

  .breadcrumb-strip {
    display: none;
  }
}

@media (max-width: 767.98px) {
  .topbar {
    padding: 0.85rem 0.85rem;
  }

  .topbar .search-bar {
    display: none !important;
  }

  .topbar-actions {
    gap: 0.75rem;
  }

  .breadcrumb-strip {
    display: none;
  }

  .page-header h1 {
    font-size: 1.6rem;
  }

  .btn,
  .btn-primary,
  .btn-secondary,
  .btn-success,
  .btn-warning,
  .btn-danger,
  .btn-info {
    width: 100%;
    justify-content: center;
  }

  .upload-panel {
    padding: 1.25rem;
  }

  .calculator-page {
    padding: 1rem;
  }
}

@media (max-width: 479.98px) {
  .topbar .btn-icon,
  .sidebar-toggle,
  .btn,
  .form-control,
  .form-select,
  textarea {
    min-height: 52px;
  }

  .page-header h1 {
    font-size: 1.4rem;
  }

  .upload-dropzone {
    padding: 1rem;
  }
}

/* Ensure images and cards resize cleanly */
img,
.video,
iframe,
embed,
object,
.picture,
.source {
  max-width: 100%;
  height: auto;
}

body[data-theme="dark"] {
  --page-bg: #071120;
  --surface: #111b2d;
  --surface-alt: #0f172a;
  --surface-soft: #0b1325;
  --border: #233147;
  --text: #e2e8f0;
  --muted: #a3b1c4;
}

body {
  background: var(--page-bg);
  color: var(--text);
}

.main-content {
  padding: 1.5rem 1.25rem 2rem;
}

.main-content > .container-fluid {
  max-width: 1600px;
  margin: 0 auto;
}

.card,
.panel,
.mini-panel,
.dashboard-hero-panel,
.auth-card,
.report-card,
.stat-card,
.kpi-card {
  border: 1px solid var(--border) !important;
  border-radius: 18px !important;
  background: var(--surface) !important;
  box-shadow: var(--shadow-sm) !important;
}

.card-body,
.card-header,
.panel-body,
.panel-header {
  border-radius: 18px;
}

.btn {
  min-height: var(--btn-height);
  height: var(--btn-height);
  padding: 0.72rem 1.15rem;
  border-radius: var(--btn-radius);
  font-weight: 700;
  letter-spacing: 0.01em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border: 1px solid transparent;
  color: #ffffff;
  box-shadow: var(--btn-shadow);
}

.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  border-color: transparent;
  color: #ffffff;
}

.btn-secondary,
.btn-outline-primary,
.btn-outline-secondary,
.btn-outline-light {
  background: #ffffff;
  border: 1px solid rgba(37, 99, 235, 0.35);
  color: var(--primary);
  box-shadow: none;
}

.btn-secondary:hover,
.btn-outline-primary:hover,
.btn-outline-secondary:hover,
.btn-outline-light:hover,
.btn-secondary:focus,
.btn-outline-primary:focus,
.btn-outline-secondary:focus,
.btn-outline-light:focus {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-color: transparent;
  color: #ffffff;
}

.btn-success {
  background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
  border: 1px solid transparent;
  color: #ffffff;
}

.btn-success:hover,
.btn-success:focus,
.btn-success:active {
  background: linear-gradient(135deg, var(--success-dark) 0%, var(--success) 100%);
  border-color: transparent;
  color: #ffffff;
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger) 0%, var(--danger-dark) 100%);
  border: 1px solid transparent;
  color: #ffffff;
}

.btn-danger:hover,
.btn-danger:focus,
.btn-danger:active {
  background: linear-gradient(135deg, var(--danger-dark) 0%, var(--danger) 100%);
  border-color: transparent;
  color: #ffffff;
}

.btn-warning {
  background: linear-gradient(135deg, var(--warning) 0%, var(--warning-dark) 100%);
  border: 1px solid transparent;
  color: #ffffff;
}

.btn-warning:hover,
.btn-warning:focus,
.btn-warning:active {
  background: linear-gradient(135deg, var(--warning-dark) 0%, var(--warning) 100%);
  border-color: transparent;
  color: #ffffff;
}

.btn-group .btn,
.d-flex.gap-2 .btn {
  min-height: var(--btn-height);
  height: var(--btn-height);
}

.form-control,
.form-select,
.input-group-text {
  border-color: var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 12px;
}

.form-control:focus,
.form-select:focus {
  border-color: rgba(37, 99, 235, 0.45);
  box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.12);
}

.table {
  --bs-table-bg: transparent;
  --bs-table-striped-bg: rgba(148, 163, 184, 0.03);
  --bs-table-hover-bg: rgba(37, 99, 235, 0.04);
}

.table thead th {
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.table tbody td {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);
}

.badge {
  border-radius: 999px;
  padding: 0.5em 0.72em;
  font-weight: 600;
}

.topbar {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  min-height: 74px;
}

.search-bar {
  max-width: 780px;
}

.search-bar .input-group {
  background: var(--surface-soft);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 16px;
  overflow: hidden;
}

.search-bar .input-group-text {
  background: transparent;
  border: none;
  color: var(--muted);
}

.search-bar .form-control {
  border: none;
  background: transparent;
  min-height: 44px;
  box-shadow: none;
}

.topbar-actions .btn-icon {
  width: 42px;
  height: 42px;
  padding: 0;
  border-radius: 12px;
  background: var(--surface-soft);
  border: 1px solid rgba(148, 163, 184, 0.14);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.profile-trigger {
  display: inline-flex;
  align-items: center;
  background: var(--surface-soft);
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 14px;
  padding: 0.42rem 0.7rem;
  color: var(--text);
}

.profile-avatar {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), #5389ff);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.badge-notification {
  position: absolute;
  right: 4px;
  top: 4px;
  min-width: 18px;
  height: 18px;
  border-radius: 999px;
  background: var(--danger);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.62rem;
  padding: 0 0.25rem;
}

.sidebar {
  min-height: calc(100vh - 74px);
  padding: 1.25rem 0.9rem 1rem;
  background: linear-gradient(180deg, #0e1d38 0%, #142c52 100%);
  color: #e2e8f0;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.4rem 0.55rem 1.1rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
  margin-bottom: 1rem;
}

.sidebar-brand .brand-mark {
  background: rgba(255,255,255,0.12);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08);
}

.sidebar-nav .nav-link {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  border-radius: 12px;
  padding: 0.82rem 0.9rem;
  color: rgba(226, 232, 240, 0.9);
  font-weight: 500;
}

.sidebar-nav .nav-link i {
  width: 1.1rem;
  text-align: center;
  font-size: 1rem;
}

.sidebar-nav .nav-link:hover,
.sidebar-nav .nav-link.active {
  background: rgba(148, 163, 184, 0.12);
  color: #fff;
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.12);
}

.btn-logout {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  color: #fff;
}

@media (max-width: 1199px) {
  .topbar .search-bar {
    display: none !important;
  }
}

@media (max-width: 991px) {
  .sidebar-toggle {
    display: inline-flex;
  }

  .app-sidebar-col {
    width: 0;
  }

  .main-content {
    min-height: auto;
    padding: 1.5rem 1rem 2rem;
  }
}

@media (max-width: 991px) {
  .sidebar {
    left: -100vw !important;
    right: auto !important;
    transform: none !important;
    transition: left 0.25s ease !important;
    width: min(320px, 100%) !important;
  }

  body.sidebar-open .sidebar {
    left: 0 !important;
  }
}

@media (max-width: 767px) {
  .topbar .profile-info {
    display: none !important;
  }

  .topbar-actions {
    gap: 0.5rem;
  }

  .sidebar {
    width: 100%;
  }
}