/*
 * PetroChain™ - Bootstrap Override CSS
 * Blockchain-Enabled Automated Fuel Management System
 * Industrial-grade, government-ready design system
 * 
 * This file overrides Bootstrap 5+ at the CSS level only.
 * All Bootstrap classes remain unchanged and functional.
 */

/* ==========================================================================
   CSS VARIABLES - PETROCHAIN COLOR PALETTE
   ========================================================================== */

:root {
  /* Primary Colors */
  --petro-midnight-charcoal: #0F172A;
  --petro-graphite-slate: #1E293B;
  --petro-blue: #1D4ED8;
  --petro-fuel-amber: #F59E0B;
  
  /* Neutral System */
  --petro-control-white: #F8FAFC;
  --petro-soft-ash: #E5E7EB;
  --petro-muted-steel: #64748B;
  
  /* Status Colors */
  --petro-success-green: #16A34A;
  --petro-error-red: #DC2626;
  --petro-info-cyan: #0891B2;
  
  /* Typography - system fonts only */
  --petro-font-ui: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --petro-font-mono: ui-monospace, 'Cascadia Mono', 'Segoe UI Mono', 'Consolas', 'Liberation Mono', 'Courier New', monospace;
  
  /* Spacing & Geometry */
  --petro-radius-global: 8px;
  --petro-radius-button: 8px;
  --petro-radius-input: 6px;
  --petro-radius-modal: 12px;
  --petro-radius-card: 10px;
  
  /* Shadows */
  --petro-shadow-subtle: 0 1px 2px rgba(0, 0, 0, 0.05);
  
  /* Transitions */
  --petro-transition-fast: 150ms ease;
  --petro-transition-normal: 200ms ease;
}

/* ==========================================================================
   BOOTSTRAP VARIABLE OVERRIDES
   ========================================================================== */

:root {
  /* Override Bootstrap color variables */
  --bs-primary: var(--petro-blue);
  --bs-secondary: var(--petro-graphite-slate);
  --bs-success: var(--petro-success-green);
  --bs-danger: var(--petro-error-red);
  --bs-warning: var(--petro-fuel-amber);
  --bs-info: var(--petro-info-cyan);
  
  /* Body & Background */
  --bs-body-bg: var(--petro-control-white);
  --bs-body-color: var(--petro-midnight-charcoal);
  --bs-border-color: var(--petro-soft-ash);
  
  /* Text Colors */
  --bs-secondary-color: var(--petro-muted-steel);
  --bs-muted-color: var(--petro-muted-steel);
  
  /* Font Family */
  --bs-font-sans-serif: var(--petro-font-ui);
  --bs-font-monospace: var(--petro-font-mono);
  
  /* Border Radius */
  --bs-border-radius: var(--petro-radius-global);
  --bs-border-radius-sm: 6px;
  --bs-border-radius-lg: 10px;
  --bs-border-radius-xl: 12px;
  
  /* Shadows */
  --bs-box-shadow-sm: var(--petro-shadow-subtle);
  --bs-box-shadow: var(--petro-shadow-subtle);
  --bs-box-shadow-lg: 0 2px 4px rgba(0, 0, 0, 0.08);
}

/* Dark Mode Default (for control rooms) */
[data-theme="dark"],
.theme-dark,
body.dark-mode {
  --bs-body-bg: var(--petro-midnight-charcoal);
  --bs-body-color: var(--petro-control-white);
  --bs-border-color: var(--petro-graphite-slate);
  --bs-secondary-color: var(--petro-muted-steel);
}

/* ==========================================================================
   BASE TYPOGRAPHY
   ========================================================================== */

html {
  position: relative;
  min-height: 100%;
  font-family: var(--petro-font-ui);
  font-size: 16px;
  line-height: 1.6;
  color: var(--petro-midnight-charcoal);
}

@media (min-width: 768px) {
  html {
    font-size: 17px;
  }
}

body {
  margin-bottom: 60px;
  font-family: var(--petro-font-ui);
  font-weight: 400;
  background-color: var(--petro-control-white);
  color: var(--petro-midnight-charcoal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Monospaced font for numeric data, hashes, IDs */
code,
pre,
.mono,
.transaction-hash,
.card-id,
.fuel-volume,
.balance,
.audit-log,
table td.mono {
  font-family: var(--petro-font-mono);
  font-size: 0.9em;
}

/* Typography Weights */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  color: var(--petro-midnight-charcoal);
  line-height: 1.3;
}

p, li, td, label {
  font-weight: 400;
}

small,
.text-muted {
  font-weight: 400;
  color: var(--petro-muted-steel);
}

strong,
b {
  font-weight: 600;
}

/* ==========================================================================
   BUTTON SYSTEM
   ========================================================================== */

.btn {
  font-family: var(--petro-font-ui);
  font-weight: 500;
  border-radius: var(--petro-radius-button);
  padding: 0.5rem 1.25rem;
  height: 40px;
  line-height: 1.5;
  border: none;
  transition: all var(--petro-transition-normal);
  text-transform: none;
  letter-spacing: normal;
  box-shadow: none;
}

.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus {
  box-shadow: 0 0 0 0.2rem rgba(29, 78, 216, 0.25);
  outline: 2px solid var(--petro-blue);
  outline-offset: 2px;
}

.btn:hover {
  transform: none;
  box-shadow: none;
}

/* Primary Button */
.btn-primary {
  background-color: var(--petro-blue);
  color: white;
  border: none;
}

.btn-primary:hover,
.btn-primary:focus {
  background-color: #1e40af;
  color: white;
}

.btn-primary:active {
  background-color: #1e3a8a;
  color: white;
}

/* Secondary Button */
.btn-secondary {
  background-color: var(--petro-control-white);
  color: var(--petro-graphite-slate);
  border: 1px solid #CBD5E1;
}

.btn-secondary:hover,
.btn-secondary:focus {
  background-color: #F1F5F9;
  color: var(--petro-graphite-slate);
  border-color: #94A3B8;
}

/* Success Button */
.btn-success {
  background-color: var(--petro-success-green);
  color: white;
}

.btn-success:hover {
  background-color: #15803d;
}

/* Danger/Destructive Button */
.btn-danger {
  background-color: var(--petro-error-red);
  color: white;
}

.btn-danger:hover {
  background-color: #b91c1c;
}

/* Warning Button */
.btn-warning {
  background-color: var(--petro-fuel-amber);
  color: white;
}

.btn-warning:hover {
  background-color: #d97706;
}

/* Info Button */
.btn-info {
  background-color: var(--petro-info-cyan);
  color: white;
}

.btn-info:hover {
  background-color: #0e7490;
}

/* Button Sizes */
.btn-sm {
  height: 36px;
  padding: 0.375rem 1rem;
  font-size: 0.875rem;
}

.btn-lg {
  height: 44px;
  padding: 0.625rem 1.5rem;
  font-size: 1rem;
}

/* Remove rounded-pill styling */
.btn.rounded-pill {
  border-radius: var(--petro-radius-button) !important;
}

/* ==========================================================================
   CARDS
   ========================================================================== */

.card {
  background-color: #FFFFFF;
  border: 1px solid var(--petro-soft-ash);
  border-radius: var(--petro-radius-card);
  box-shadow: var(--petro-shadow-subtle);
  transition: border-color var(--petro-transition-fast);
  overflow: hidden;
}

.card:hover {
  border-color: #CBD5E1;
  transform: none;
  box-shadow: var(--petro-shadow-subtle);
}

.card-header {
  background-color: var(--petro-control-white);
  border-bottom: 1px solid var(--petro-soft-ash);
  padding: 1rem 1.25rem;
  font-weight: 600;
  font-size: 1rem;
  color: var(--petro-midnight-charcoal);
}

.card-body {
  padding: 1.25rem;
}

.card-footer {
  background-color: var(--petro-control-white);
  border-top: 1px solid var(--petro-soft-ash);
  padding: 1rem 1.25rem;
}

.card-title {
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--petro-midnight-charcoal);
  margin-bottom: 0.75rem;
}

.card-subtitle {
  font-weight: 500;
  color: var(--petro-muted-steel);
  font-size: 0.875rem;
}

.card-text {
  font-weight: 400;
  color: var(--petro-midnight-charcoal);
  line-height: 1.6;
}

/* Dark cards for dashboards */
.card-dark {
  background-color: var(--petro-graphite-slate);
  border-color: #334155;
  color: var(--petro-control-white);
}

.card-dark .card-header,
.card-dark .card-footer {
  background-color: var(--petro-midnight-charcoal);
  border-color: #334155;
  color: var(--petro-control-white);
}

/* ==========================================================================
   FORMS & INPUTS
   ========================================================================== */

.form-control,
.form-select {
  font-family: var(--petro-font-ui);
  font-size: 1rem;
  font-weight: 400;
  color: var(--petro-midnight-charcoal);
  background-color: white;
  border: 1px solid var(--petro-soft-ash);
  border-radius: var(--petro-radius-input);
  padding: 0.5rem 0.75rem;
  transition: border-color var(--petro-transition-fast), box-shadow var(--petro-transition-fast);
  box-shadow: none;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--petro-blue);
  box-shadow: 0 0 0 0.2rem rgba(29, 78, 216, 0.15);
  outline: none;
  background-color: white;
}

.form-control:hover {
  border-color: #CBD5E1;
}

.form-control::placeholder {
  color: var(--petro-muted-steel);
  opacity: 1;
}

/* Labels - Always visible */
.form-label {
  font-family: var(--petro-font-ui);
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--petro-midnight-charcoal);
  margin-bottom: 0.5rem;
  display: block;
}

/* Form Validation */
.form-control.is-invalid,
.form-select.is-invalid {
  border-color: var(--petro-error-red);
}

.form-control.is-invalid:focus {
  border-color: var(--petro-error-red);
  box-shadow: 0 0 0 0.2rem rgba(220, 38, 38, 0.15);
}

.form-control.is-valid,
.form-select.is-valid {
  border-color: var(--petro-success-green);
}

.form-control.is-valid:focus {
  border-color: var(--petro-success-green);
  box-shadow: 0 0 0 0.2rem rgba(22, 163, 74, 0.15);
}

.invalid-feedback,
.valid-feedback {
  font-size: 0.875rem;
  font-weight: 400;
  margin-top: 0.25rem;
}

.invalid-feedback {
  color: var(--petro-error-red);
}

.valid-feedback {
  color: var(--petro-success-green);
}

/* Form Check */
.form-check-input {
  border-color: var(--petro-soft-ash);
  border-radius: 4px;
}

.form-check-input:checked {
  background-color: var(--petro-blue);
  border-color: var(--petro-blue);
}

.form-check-input:focus {
  box-shadow: 0 0 0 0.2rem rgba(29, 78, 216, 0.15);
  border-color: var(--petro-blue);
}

.form-check-label {
  font-weight: 400;
  color: var(--petro-midnight-charcoal);
  margin-left: 0.5rem;
}

/* Remove rounded-pill styling from inputs */
.form-control.rounded-pill,
.form-select.rounded-pill {
  border-radius: var(--petro-radius-input) !important;
}

/* ==========================================================================
   TABLES
   ========================================================================== */

.table {
  font-family: var(--petro-font-ui);
  color: var(--petro-midnight-charcoal);
  border-color: var(--petro-soft-ash);
  font-size: 0.9375rem;
}

.table > :not(caption) > * > * {
  padding: 0.75rem 1rem;
  border-bottom-width: 1px;
  border-bottom-color: var(--petro-soft-ash);
}

.table thead th {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--petro-midnight-charcoal);
  background-color: var(--petro-control-white);
  border-bottom: 2px solid var(--petro-soft-ash);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

.table tbody td {
  font-weight: 400;
  vertical-align: middle;
}

/* Monospaced columns for numeric data */
.table td.mono,
.table td.transaction-hash,
.table td.card-id,
.table td.fuel-volume,
.table td.balance {
  font-family: var(--petro-font-mono);
  font-size: 0.875rem;
}

/* Striped tables */
.table-striped > tbody > tr:nth-of-type(odd) > * {
  background-color: #F8FAFC;
}

/* Bordered tables */
.table-bordered {
  border: 1px solid var(--petro-soft-ash);
}

.table-bordered > :not(caption) > * {
  border-width: 1px;
  border-color: var(--petro-soft-ash);
}

/* ==========================================================================
   NAVBAR
   ========================================================================== */

.navbar {
  border-bottom: 1px solid var(--petro-soft-ash);
  box-shadow: none;
  padding: 0.75rem 0;
}

.navbar-brand {
  font-family: var(--petro-font-ui);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--petro-midnight-charcoal) !important;
}

.navbar-nav .nav-link {
  font-family: var(--petro-font-ui);
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--petro-midnight-charcoal) !important;
  padding: 0.5rem 1rem;
  transition: color var(--petro-transition-fast);
}

.navbar-nav .nav-link:hover {
  color: var(--petro-blue) !important;
}

.navbar-nav .nav-link.active {
  color: var(--petro-blue) !important;
  font-weight: 600;
}

.navbar-light {
  background-color: white !important;
  border-bottom-color: var(--petro-soft-ash);
}

/* Dark navbar variant */
.navbar-dark {
  background-color: var(--petro-midnight-charcoal) !important;
  border-bottom-color: var(--petro-graphite-slate);
}

.navbar-dark .navbar-brand {
  color: white !important;
}

.navbar-dark .nav-link {
  color: var(--petro-control-white) !important;
}

.navbar-dark .nav-link:hover {
  color: var(--petro-blue) !important;
}

.navbar-toggler {
  border: 1px solid var(--petro-soft-ash);
  border-radius: var(--petro-radius-input);
  padding: 0.25rem 0.5rem;
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 0.2rem rgba(29, 78, 216, 0.15);
}

/* ==========================================================================
   ALERTS
   ========================================================================== */

.alert {
  font-family: var(--petro-font-ui);
  border: 1px solid;
  border-radius: var(--petro-radius-global);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  font-weight: 400;
  box-shadow: none;
}

.alert-primary {
  background-color: #EFF6FF;
  border-color: #BFDBFE;
  color: #1e3a8a;
}

.alert-success {
  background-color: #F0FDF4;
  border-color: #BBF7D0;
  color: #166534;
}

.alert-danger {
  background-color: #FEF2F2;
  border-color: #FECACA;
  color: #991b1b;
}

.alert-warning {
  background-color: #FFFBEB;
  border-color: #FDE68A;
  color: #92400e;
}

.alert-info {
  background-color: #ECFEFF;
  border-color: #A5F3FC;
  color: #164e63;
}

.alert-heading {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

/* ==========================================================================
   MODALS
   ========================================================================== */

.modal-content {
  border: none;
  border-radius: var(--petro-radius-modal);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
  background-color: white;
}

.modal-header {
  border-bottom: 1px solid var(--petro-soft-ash);
  padding: 1.25rem 1.5rem;
  background-color: var(--petro-control-white);
  border-radius: var(--petro-radius-modal) var(--petro-radius-modal) 0 0;
}

.modal-title {
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--petro-midnight-charcoal);
}

.modal-body {
  padding: 1.5rem;
  font-weight: 400;
  color: var(--petro-midnight-charcoal);
}

.modal-footer {
  border-top: 1px solid var(--petro-soft-ash);
  padding: 1rem 1.5rem;
  background-color: var(--petro-control-white);
  border-radius: 0 0 var(--petro-radius-modal) var(--petro-radius-modal);
}

.modal-backdrop {
  background-color: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(2px);
}

.modal-backdrop.show {
  opacity: 1;
}

.btn-close {
  opacity: 0.6;
}

.btn-close:hover {
  opacity: 1;
}

/* ==========================================================================
   DROPDOWNS
   ========================================================================== */

.dropdown-menu {
  border: 1px solid var(--petro-soft-ash);
  border-radius: var(--petro-radius-global);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  padding: 0.5rem;
  background-color: white;
  font-family: var(--petro-font-ui);
}

.dropdown-item {
  font-weight: 400;
  font-size: 0.9375rem;
  color: var(--petro-midnight-charcoal);
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  transition: background-color var(--petro-transition-fast);
}

.dropdown-item:hover,
.dropdown-item:focus {
  background-color: #F1F5F9;
  color: var(--petro-midnight-charcoal);
}

.dropdown-item.active,
.dropdown-item:active {
  background-color: var(--petro-blue);
  color: white;
}

.dropdown-divider {
  border-top: 1px solid var(--petro-soft-ash);
  margin: 0.5rem 0;
}

/* ==========================================================================
   BADGES
   ========================================================================== */

.badge {
  font-family: var(--petro-font-ui);
  font-weight: 500;
  font-size: 0.75rem;
  padding: 0.35em 0.65em;
  border-radius: 4px;
  letter-spacing: 0.025em;
}

.badge-primary,
.bg-primary {
  background-color: var(--petro-blue) !important;
}

.badge-success,
.bg-success {
  background-color: var(--petro-success-green) !important;
}

.badge-danger,
.bg-danger {
  background-color: var(--petro-error-red) !important;
}

.badge-warning,
.bg-warning {
  background-color: var(--petro-fuel-amber) !important;
  color: white;
}

.badge-info,
.bg-info {
  background-color: var(--petro-info-cyan) !important;
}

/* Immutable badge for blockchain transactions */
.badge-immutable {
  background-color: var(--petro-graphite-slate);
  color: white;
  font-family: var(--petro-font-mono);
  font-size: 0.7rem;
}

/* ==========================================================================
   UTILITY CLASSES
   ========================================================================== */

.text-primary {
  color: var(--petro-blue) !important;
}

.text-success {
  color: var(--petro-success-green) !important;
}

.text-danger {
  color: var(--petro-error-red) !important;
}

.text-warning {
  color: var(--petro-fuel-amber) !important;
}

.text-info {
  color: var(--petro-info-cyan) !important;
}

.text-muted {
  color: var(--petro-muted-steel) !important;
}

.border-primary {
  border-color: var(--petro-blue) !important;
}

.border-success {
  border-color: var(--petro-success-green) !important;
}

.border-danger {
  border-color: var(--petro-error-red) !important;
}

.border-warning {
  border-color: var(--petro-fuel-amber) !important;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.footer {
  background-color: white;
  border-top: 1px solid var(--petro-soft-ash);
  color: var(--petro-muted-steel);
  font-size: 0.875rem;
  padding: 1.5rem 0;
  margin-top: 3rem;
}

.footer a {
  color: var(--petro-blue);
  text-decoration: none;
}

.footer a:hover {
  color: #1e40af;
  text-decoration: underline;
}

/* ==========================================================================
   BLOCKCHAIN TRANSACTION DISPLAY
   ========================================================================== */

.transaction-hash {
  font-family: var(--petro-font-mono);
  font-size: 0.875rem;
  color: var(--petro-midnight-charcoal);
  background-color: var(--petro-control-white);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  display: inline-block;
}

/* ==========================================================================
   ANIMATIONS & TRANSITIONS
   ========================================================================== */

/* Minimal animation - only for essential interactions */
.drawer-slide {
  transition: transform var(--petro-transition-normal);
}

.status-change {
  transition: background-color var(--petro-transition-normal), 
              color var(--petro-transition-normal);
}

/* No bounce, no spring */
* {
  animation-timing-function: ease;
}

/* ==========================================================================
   APP CHROME (HEADER / MAIN / FOOTER)
   ========================================================================== */

.app-header .navbar {
  background-color: var(--petro-graphite-slate) !important;
  border-bottom: none;
  min-height: 52px;
}

.app-main {
  background-color: #F1F5F9;
  min-height: calc(100vh - 52px - 80px);
}

.app-footer {
  background-color: #fff;
  font-size: 0.8125rem;
}

/* ==========================================================================
   DASHBOARD & LANDING
   ========================================================================== */

.dashboard-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--petro-midnight-charcoal);
}

.dashboard-subtitle {
  font-size: 0.875rem;
}

.dashboard-card {
  border: 1px solid #E2E8F0;
  border-radius: var(--petro-radius-card);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  background: #fff;
}

.dashboard-card .card-title {
  font-size: 1rem;
  font-weight: 600;
}

.dashboard-card-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.landing-title {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--petro-midnight-charcoal);
}

.landing-subtitle {
  font-size: 0.9375rem;
}

.landing-cta-card {
  border: 1px solid #E2E8F0;
  border-radius: var(--petro-radius-card);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.landing-cta-card:hover {
  border-color: #94A3B8;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.dashboard-quicklinks {
  padding: 0.75rem 1rem;
  background: #fff;
  border: 1px solid #E2E8F0;
  border-radius: var(--petro-radius-card);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

/* ==========================================================================
   RESPONSIVE ADJUSTMENTS
   ========================================================================== */

@media (max-width: 767.98px) {
  .card {
    margin-bottom: 1rem;
  }
  
  .btn {
    width: 100%;
    margin-bottom: 0.5rem;
  }
  
  .btn-group .btn {
    width: auto;
  }
}

/* ==========================================================================
   DARK MODE SUPPORT
   ========================================================================== */

[data-theme="dark"] body,
.theme-dark body,
body.dark-mode {
  background-color: var(--petro-midnight-charcoal);
  color: var(--petro-control-white);
}

[data-theme="dark"] .card,
.theme-dark .card,
body.dark-mode .card {
  background-color: var(--petro-graphite-slate);
  border-color: #334155;
  color: var(--petro-control-white);
}

[data-theme="dark"] .form-control,
.theme-dark .form-control,
body.dark-mode .form-control {
  background-color: var(--petro-graphite-slate);
  border-color: #334155;
  color: var(--petro-control-white);
}

[data-theme="dark"] .table,
.theme-dark .table,
body.dark-mode .table {
  color: var(--petro-control-white);
  border-color: #334155;
}

[data-theme="dark"] .table thead th,
.theme-dark .table thead th,
body.dark-mode .table thead th {
  background-color: var(--petro-midnight-charcoal);
  border-bottom-color: #334155;
  color: var(--petro-control-white);
}

[data-theme="dark"] .table tbody tr:hover,
.theme-dark .table tbody tr:hover,
body.dark-mode .table tbody tr:hover {
  background-color: var(--petro-graphite-slate);
}

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */

@media print {
  .navbar,
  .footer,
  .btn,
  .dropdown-menu {
    display: none !important;
  }
  
  .card {
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }
  
  body {
    background: white;
    color: black;
  }
}