/* ==========================================================================
   Fuel Tracker — Design System & Responsive Stylesheet
   Palette: Dark Slate (#0F172A / #1E293B), Rabeeh (#22D3EE), Mubarak (#FBBF24)
   ========================================================================== */

:root {
  --bg: #0F172A;
  --bg-elevated: #131D35;
  --surface: #1E293B;
  --surface-hover: #263449;
  --surface-active: #2D3D56;
  --border: #334155;
  --border-subtle: rgba(148, 163, 184, 0.16);

  --text: #F8FAFC;
  --text-secondary: #CBD5E1;
  --muted: #94A3B8;

  --rabeeh: #22D3EE;
  --rabeeh-soft: rgba(34, 211, 238, 0.14);
  --mubarak: #FBBF24;
  --mubarak-soft: rgba(251, 191, 36, 0.14);

  --accent: #6366F1;
  --accent-hover: #4F46E5;
  --accent-soft: rgba(99, 102, 241, 0.16);

  --success: #10B981;
  --success-soft: rgba(16, 185, 129, 0.16);
  --danger: #EF4444;
  --danger-soft: rgba(239, 68, 68, 0.16);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;

  --control-height: 46px;
  --max-width: 720px;
  --shadow-sm: 0 2px 8px rgba(2, 6, 23, 0.25);
  --shadow-lg: 0 16px 36px rgba(2, 6, 23, 0.55);
  --transition: 160ms cubic-bezier(0.2, 0, 0, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  color-scheme: dark;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Helvetica, Arial, sans-serif;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  min-height: 100dvh;
}

.tabular-nums {
  font-variant-numeric: tabular-nums;
}

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.rabeeh-text {
  color: var(--rabeeh);
}

.mubarak-text {
  color: var(--mubarak);
}

.muted-normal {
  color: var(--muted);
  font-weight: 400;
}

/* ==========================================================================
   Top Sticky Application Bar
   ========================================================================== */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  padding-top: env(safe-area-inset-top);
}

.topbar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  height: 60px;
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.brand-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: block;
  line-height: 1.1;
}

.brand-tag {
  font-size: 0.68rem;
  color: var(--muted);
  font-weight: 500;
}

.header-status-group {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.status-pill {
  height: 30px;
  padding: 0 10px;
  border-radius: var(--radius-full);
  background: var(--surface);
  border: 1px solid var(--border);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--rabeeh);
}

.next-pill-label {
  color: var(--muted);
  font-weight: 500;
}

.icon-btn {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

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

.icon-btn:active {
  transform: scale(0.95);
}

/* ==========================================================================
   Main Container & View Layout
   ========================================================================== */

.main-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-4) var(--space-4) calc(96px + env(safe-area-inset-bottom));
}

.section-header {
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 2px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   Form Controls & Vehicle Brand Grid
   ========================================================================== */

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

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

.field-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.field-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}

.field-hint {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--rabeeh);
}

.input,
select.input {
  width: 100%;
  height: var(--control-height);
  padding: 0 14px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.input:focus,
select.input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.quick-date-pills {
  display: flex;
  gap: 6px;
}

.mini-chip {
  height: 26px;
  padding: 0 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.mini-chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
}

/* Vehicle Grid */
.vehicle-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.vehicle-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 12px;
  background: var(--bg-elevated);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  text-align: left;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.vehicle-card:hover {
  background: var(--surface-hover);
}

.vehicle-card.active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.vehicle-logo-box {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.vehicle-card-info {
  min-width: 0;
  flex: 1;
}

.vehicle-card-name {
  font-size: 0.88rem;
  font-weight: 700;
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.vehicle-card-meta {
  font-size: 0.72rem;
  color: var(--muted);
  display: block;
  margin-top: 2px;
}

/* Amount Chips & Currency Input */
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.amount-chip {
  height: 34px;
  padding: 0 14px;
  border-radius: var(--radius-full);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.amount-chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
}

.currency-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.currency-prefix {
  position: absolute;
  left: 14px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--muted);
  pointer-events: none;
}

.currency-input {
  padding-left: 34px;
  font-size: 1.05rem;
  font-weight: 700;
}

/* Segmented Control */
.segmented-control {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--bg-elevated);
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.segment-btn {
  height: 38px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.segment-btn.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.segment-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* Payer Cards */
.payer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.payer-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 12px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1.5px solid var(--border);
  color: var(--text);
  cursor: pointer;
  text-align: left;
  transition: all var(--transition);
}

.payer-card.active.payer-rabeeh {
  border-color: var(--rabeeh);
  background: var(--rabeeh-soft);
}

.payer-card.active.payer-mubarak {
  border-color: var(--mubarak);
  background: var(--mubarak-soft);
}

.payer-card:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.payer-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.rabeeh-avatar {
  background: var(--rabeeh-soft);
  color: var(--rabeeh);
  border: 1px solid rgba(34, 211, 238, 0.4);
}

.mubarak-avatar {
  background: var(--mubarak-soft);
  color: var(--mubarak);
  border: 1px solid rgba(251, 191, 36, 0.4);
}

.payer-meta {
  min-width: 0;
}

.payer-name {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
}

.payer-sub {
  display: block;
  font-size: 0.7rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Split Allocation Box */
.split-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.split-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.text-btn {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
}

.split-inputs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.split-col {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.split-person-label {
  font-size: 0.75rem;
  font-weight: 700;
}

.split-status-msg {
  font-size: 0.76rem;
  color: var(--muted);
}

.split-status-msg.valid {
  color: var(--success);
}

.split-status-msg.invalid {
  color: var(--danger);
}

/* Payment Method Brand SVG Grid */
.payment-via-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
}

.via-card {
  height: 48px;
  padding: 0 10px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1.5px solid var(--border);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  transition: all var(--transition);
}

.via-card:hover {
  background: var(--surface-hover);
}

.via-card.active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.via-logo {
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.via-label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Buttons & Form Actions */
.form-actions-bar {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.btn {
  height: var(--control-height);
  padding: 0 18px;
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  text-decoration: none;
  border: none;
  transition: background var(--transition), transform var(--transition), opacity var(--transition);
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: #FFFFFF;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-outline-accent {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--text-secondary);
  flex: 1;
}

.btn-submit-main {
  flex: 2;
}

.btn-danger {
  background: var(--danger);
  color: #FFFFFF;
}

.btn-danger-outline {
  background: var(--danger-soft);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: var(--danger);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  height: 38px;
  padding: 0 14px;
  font-size: 0.82rem;
}

.form-error {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--danger-soft);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #FCA5A5;
  font-size: 0.82rem;
  font-weight: 500;
}

/* ==========================================================================
   View & Track — Hero Card, Filters, Stats, Transaction List
   ========================================================================== */

.hero-card {
  background: linear-gradient(145deg, #1E293B 0%, #151F32 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-sm);
}

.hero-top-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
}

.hero-eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--muted);
  display: block;
}

.hero-payer-name {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-top: 4px;
}

.hero-reason-text {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.hero-ev-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  text-align: right;
  flex-shrink: 0;
}

.hero-ev-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--muted);
  display: block;
}

.hero-ev-value {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--rabeeh);
  margin-top: 2px;
}

.hero-ev-sub {
  font-size: 0.68rem;
  color: var(--muted);
  display: block;
}

.ev-progress-wrap {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.ev-progress-segments {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  flex: 1;
}

.ev-seg {
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  transition: background var(--transition);
}

.ev-seg.filled {
  background: var(--rabeeh);
  border-color: var(--rabeeh);
}

.ev-seg.overcap {
  background: var(--mubarak);
  border-color: var(--mubarak);
}

.ev-overflow-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--mubarak-soft);
  color: var(--mubarak);
  white-space: nowrap;
}

/* Filter Card */
.filter-bar {
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.period-chips {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
  padding-bottom: 2px;
}

.period-chips::-webkit-scrollbar {
  display: none;
}

.period-chip {
  height: 32px;
  padding: 0 12px;
  border-radius: var(--radius-full);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
}

.period-chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
}

.custom-range-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: var(--space-2);
  align-items: end;
}

.custom-date-col label {
  display: block;
  font-size: 0.7rem;
  color: var(--muted);
  margin-bottom: 4px;
}

.secondary-filters {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}

.filter-search-wrap {
  grid-column: 1 / -1;
}

.compact-input,
.compact-select {
  height: 38px;
  font-size: 0.84rem;
  padding: 0 10px;
}

/* Stats Grid */
.stats-overview-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-card.rabeeh-border {
  border-left: 3px solid var(--rabeeh);
}

.stat-card.mubarak-border {
  border-left: 3px solid var(--mubarak);
}

.stat-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-value {
  font-size: 1.35rem;
  font-weight: 800;
}

.stat-sub {
  font-size: 0.72rem;
  color: var(--muted);
}

/* Breakdown & History Cards */
.breakdown-card,
.history-card {
  margin-bottom: var(--space-4);
}

.card-header-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
}

.card-subtitle {
  font-size: 0.75rem;
  color: var(--muted);
}

.vehicle-breakdown-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.vehicle-stat-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.vehicle-stat-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.vehicle-stat-name {
  font-size: 0.88rem;
  font-weight: 600;
}

.vehicle-stat-count {
  font-size: 0.74rem;
  color: var(--muted);
}

.vehicle-stat-amt {
  font-size: 0.92rem;
  font-weight: 700;
}

/* Transaction List Items */
.entry-list {
  display: flex;
  flex-direction: column;
}

.entry-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 14px 4px;
  border-bottom: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: background var(--transition);
}

.entry-item:last-child {
  border-bottom: none;
}

.entry-item:hover {
  background: rgba(255, 255, 255, 0.02);
}

.entry-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
  flex: 1;
}

.entry-brand-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.entry-meta {
  min-width: 0;
  flex: 1;
}

.entry-title-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.entry-vehicle-name {
  font-size: 0.92rem;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.entry-sub-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.76rem;
  color: var(--muted);
  margin-top: 2px;
  flex-wrap: wrap;
}

.entry-via-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 1px 6px;
  border-radius: 6px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  font-size: 0.7rem;
  color: var(--text-secondary);
}

.entry-via-badge svg {
  width: 12px;
  height: 12px;
}

.entry-remarks-preview {
  font-size: 0.74rem;
  color: var(--text-secondary);
  margin-top: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.entry-right {
  text-align: right;
  flex-shrink: 0;
}

.entry-amount {
  font-size: 0.98rem;
  font-weight: 800;
  display: block;
}

.payer-pill {
  display: inline-block;
  margin-top: 3px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.68rem;
  font-weight: 700;
}

.payer-pill.rabeeh {
  background: var(--rabeeh-soft);
  color: var(--rabeeh);
}

.payer-pill.mubarak {
  background: var(--mubarak-soft);
  color: var(--mubarak);
}

.payer-pill.split {
  background: var(--accent-soft);
  color: #A5B4FC;
}

/* ==========================================================================
   Bottom Navigation Bar
   ========================================================================== */

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 45;
  background: rgba(30, 41, 59, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--border);
  padding-bottom: env(safe-area-inset-bottom);
  display: flex;
  justify-content: center;
}

.nav-tab {
  flex: 1;
  max-width: 240px;
  height: 58px;
  background: none;
  border: none;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  font-size: 0.74rem;
  font-weight: 600;
  cursor: pointer;
  transition: color var(--transition);
}

.nav-tab.active {
  color: var(--text);
}

.nav-tab.active svg {
  stroke: var(--accent);
}

/* ==========================================================================
   Auth Overlay, Modals, Bottom Sheets & Toast Notifications
   ========================================================================== */

.auth-overlay,
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: rgba(2, 6, 23, 0.78);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.auth-logo-badge {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
}

.auth-title {
  font-size: 1.35rem;
  font-weight: 800;
}

.auth-subtitle {
  font-size: 0.84rem;
  color: var(--muted);
  margin-top: 4px;
  margin-bottom: var(--space-5);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.auth-input {
  text-align: center;
  font-size: 1.1rem;
  letter-spacing: 0.12em;
}

/* Modal Sheet */
.modal-sheet {
  width: 100%;
  max-width: 480px;
  max-height: 90dvh;
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.sheet-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
}

.modal-body-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.modal-icon.warning-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--mubarak-soft);
  color: var(--mubarak);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
}

.modal-actions .btn {
  flex: 1;
}

.detail-summary-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.detail-row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: 0.86rem;
}

.detail-row span:first-child {
  color: var(--muted);
}

.detail-row strong {
  text-align: right;
}

.delete-warning-box {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background: var(--danger-soft);
  border: 1px solid rgba(239, 68, 68, 0.35);
}

.delete-warning-box h4 {
  color: #FCA5A5;
  margin-bottom: 6px;
}

.delete-warning-box p {
  font-size: 0.84rem;
  color: var(--text-secondary);
}

/* Toast Notification */
.toast-container {
  position: fixed;
  top: calc(16px + env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: calc(100% - 32px);
  max-width: 420px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.toast.success {
  border-left: 4px solid var(--success);
}

.toast.error {
  border-left: 4px solid var(--danger);
}

/* Offline Banner & Empty State */
.offline-banner {
  background: rgba(239, 68, 68, 0.18);
  border-bottom: 1px solid rgba(239, 68, 68, 0.35);
  color: #FCA5A5;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 8px var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.empty-state {
  padding: var(--space-8) var(--space-4);
  text-align: center;
  color: var(--muted);
}

.empty-icon {
  margin-bottom: var(--space-2);
  color: var(--border);
}

.empty-state h4 {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.empty-state p {
  font-size: 0.8rem;
}

/* Skeletons */
.skeleton-block {
  background: linear-gradient(90deg, #1E293B 0%, #2D3D56 50%, #1E293B 100%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite linear;
  border-radius: var(--radius-md);
}

.hero-card.skeleton-block {
  height: 148px;
}

.stat-skeleton {
  height: 88px;
}

.history-skeleton-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.row-skeleton {
  height: 60px;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Responsive Breakpoints */
@media (max-width: 380px) {
  .vehicle-grid,
  .payer-grid {
    grid-template-columns: 1fr;
  }
  .payment-via-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .hero-payer-name {
    font-size: 1.65rem;
  }
}

@media (min-width: 640px) {
  .payment-via-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
  .secondary-filters {
    grid-template-columns: 1fr 1fr 1.4fr;
  }
  .filter-search-wrap {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}