/* ==========================================================================
   Australia Fuel Import Dashboard — Dark-first energy sector palette
   ========================================================================== */

/* --- Design Tokens --- */
:root {
  /* Type Scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Fonts */
  --font-body: 'General Sans', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'Menlo', monospace;
}

/* --- Dark Theme (Default) --- */
[data-theme="dark"] {
  --color-bg: #0c1117;
  --color-surface: #131a22;
  --color-surface-2: #1a2332;
  --color-surface-offset: #172030;
  --color-border: #243044;
  --color-divider: #1e2a3a;
  --color-text: #d4dbe4;
  --color-text-muted: #7a8da4;
  --color-text-faint: #4a5d78;
  --color-text-inverse: #0c1117;
  --color-primary: #3b9eff;
  --color-primary-hover: #2b88e0;
  --color-primary-active: #1a70c0;
  --color-primary-highlight: #1a3050;
  --color-success: #22c55e;
  --color-success-muted: #16532d;
  --color-warning: #f59e0b;
  --color-warning-muted: #533a10;
  --color-error: #ef4444;
  --color-error-muted: #5c1a1a;
  --color-blue: #60a5fa;
  --color-orange: #fb923c;
  --color-purple: #a78bfa;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
}

/* --- Light Theme --- */
[data-theme="light"] {
  --color-bg: #f0f4f8;
  --color-surface: #ffffff;
  --color-surface-2: #f8fafc;
  --color-surface-offset: #e8edf3;
  --color-border: #d0d9e4;
  --color-divider: #e2e8f0;
  --color-text: #1a2332;
  --color-text-muted: #5a6b82;
  --color-text-faint: #94a3b8;
  --color-text-inverse: #f0f4f8;
  --color-primary: #1d6fd3;
  --color-primary-hover: #155bb0;
  --color-primary-active: #0e468c;
  --color-primary-highlight: #dbeafe;
  --color-success: #16a34a;
  --color-success-muted: #dcfce7;
  --color-warning: #d97706;
  --color-warning-muted: #fef3c7;
  --color-error: #dc2626;
  --color-error-muted: #fee2e2;
  --color-blue: #2563eb;
  --color-orange: #ea580c;
  --color-purple: #7c3aed;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg: #f0f4f8;
    --color-surface: #ffffff;
    --color-surface-2: #f8fafc;
    --color-surface-offset: #e8edf3;
    --color-border: #d0d9e4;
    --color-divider: #e2e8f0;
    --color-text: #1a2332;
    --color-text-muted: #5a6b82;
    --color-text-faint: #94a3b8;
    --color-text-inverse: #f0f4f8;
    --color-primary: #1d6fd3;
    --color-primary-hover: #155bb0;
    --color-primary-active: #0e468c;
    --color-primary-highlight: #dbeafe;
    --color-success: #16a34a;
    --color-success-muted: #dcfce7;
    --color-warning: #d97706;
    --color-warning-muted: #fef3c7;
    --color-error: #dc2626;
    --color-error-muted: #fee2e2;
    --color-blue: #2563eb;
    --color-orange: #ea580c;
    --color-purple: #7c3aed;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  }
}

/* --- Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
html, body {
  height: 100%;
  overflow: hidden;
}
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}
img, svg { display: block; max-width: 100%; }
ul, ol { list-style: none; }
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
table { border-collapse: collapse; width: 100%; }

/* --- Dashboard Layout --- */
.dashboard {
  display: grid;
  grid-template-columns: 220px 1fr;
  grid-template-rows: auto 1fr;
  height: 100dvh;
}

/* --- Sidebar --- */
.sidebar {
  grid-row: 1 / -1;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overscroll-behavior: contain;
}
.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}
.logo-text {
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}
.sidebar-nav {
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  flex: 1;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: all var(--transition-interactive);
}
.nav-item:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
  text-decoration: none;
}
.nav-item.active {
  color: var(--color-primary);
  background: var(--color-primary-highlight);
}
.sidebar-footer {
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
}
.last-updated {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.update-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* --- Header --- */
.header {
  grid-column: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header h1 {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.header-subtitle {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: 2px;
  display: block;
}
.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.status-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
}
.status-badge.status-caution {
  background: var(--color-warning-muted);
  color: var(--color-warning);
}
.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse 2s ease-in-out infinite;
}
[data-theme-toggle] {
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  transition: all var(--transition-interactive);
}
[data-theme-toggle]:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

/* --- Main --- */
.main {
  grid-column: 2;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: var(--space-5);
}

/* --- Page Routing --- */
.page {
  display: none;
  flex-direction: column;
  gap: var(--space-5);
}
.page.active {
  display: flex;
}

/* --- Alert Banner --- */
.alert-banner {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-warning-muted);
  border: 1px solid color-mix(in srgb, var(--color-warning) 30%, transparent);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-warning);
  line-height: 1.5;
}
.alert-banner svg {
  flex-shrink: 0;
  margin-top: 2px;
}

/* --- KPI Row --- */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-4);
}
.kpi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
}
.kpi-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}
.kpi-value {
  font-size: var(--text-xl);
  font-weight: 700;
  font-variant-numeric: tabular-nums lining-nums;
  letter-spacing: -0.02em;
  color: var(--color-text);
  line-height: 1.1;
}
.kpi-unit {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  margin-left: var(--space-1);
}
.kpi-delta {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 500;
}
.delta-down { color: var(--color-error); }
.delta-stable { color: var(--color-text-muted); }
.delta-caution { color: var(--color-warning); }
.delta-up { color: var(--color-success); }

/* --- Cards --- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}
.card-header h2 {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}
.card-badge {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-faint);
  padding: 2px var(--space-2);
  background: var(--color-surface-2);
  border-radius: var(--radius-sm);
}

.chart-card,
.guarantee-card {
  overflow: hidden;
}

/* --- Charts Row --- */
.charts-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-4);
}
.charts-row-2 {
  grid-template-columns: 1fr 1fr;
}
.kpi-row-4 {
  grid-template-columns: repeat(4, 1fr);
}
.chart-container {
  padding: var(--space-4) var(--space-5);
  position: relative;
}
.donut-container {
  max-width: 280px;
  margin: 0 auto;
}
.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  padding: 0 var(--space-5) var(--space-4);
}
.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* --- Guarantee List --- */
.guarantee-list {
  padding: var(--space-3) var(--space-4);
}
.guarantee-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}
.guarantee-grid .guarantee-item {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-divider);
  border-right: 1px solid var(--color-divider);
}
.guarantee-grid .guarantee-item:nth-child(3n) {
  border-right: none;
}
.guarantee-grid .guarantee-item:nth-last-child(-n+3) {
  border-bottom: none;
}
.guarantee-grid .guarantee-share {
  white-space: normal;
}
.guarantee-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-2);
  border-bottom: 1px solid var(--color-divider);
}
.guarantee-item:last-child { border-bottom: none; }
.guarantee-flag {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--color-surface-2);
  flex-shrink: 0;
}
.flag-emoji { font-size: 18px; }
.guarantee-info { flex: 1; min-width: 0; }
.guarantee-country {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}
.guarantee-share {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.guarantee-status {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  white-space: nowrap;
}
.status-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}
.status-confirmed { color: var(--color-success); background: var(--color-success-muted); }
.status-confirmed .status-indicator { background: var(--color-success); }
.status-partial { color: var(--color-warning); background: var(--color-warning-muted); }
.status-partial .status-indicator { background: var(--color-warning); }
.status-restricted { color: var(--color-error); background: var(--color-error-muted); }
.status-restricted .status-indicator { background: var(--color-error); }
.status-new { color: var(--color-primary); background: var(--color-primary-highlight); }
.status-new .status-indicator { background: var(--color-primary); }

/* --- Table --- */
.table-card { }
.table-filters {
  display: flex;
  gap: var(--space-1);
}
.filter-btn {
  font-size: var(--text-xs);
  font-weight: 500;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  transition: all var(--transition-interactive);
}
.filter-btn:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}
.filter-btn.active {
  color: var(--color-primary);
  background: var(--color-primary-highlight);
}
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
  position: relative;
}
.table-wrapper::-webkit-scrollbar {
  height: 8px;
  -webkit-appearance: none;
}
.table-wrapper::-webkit-scrollbar-track {
  background: var(--color-surface-2);
  border-radius: 4px;
}
.table-wrapper::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}
.table-wrapper::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-faint);
}
table th, table td {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  white-space: nowrap;
}
table th {
  font-weight: 600;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--color-surface-2);
  position: sticky;
  top: 0;
  z-index: 1;
}
table td {
  border-bottom: 1px solid var(--color-divider);
  color: var(--color-text);
}
table tbody tr {
  transition: background var(--transition-interactive);
}
table tbody tr:hover {
  background: var(--color-surface-2);
}
.table-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
}
.table-status.enroute { color: var(--color-primary); background: var(--color-primary-highlight); }
.table-status.arrived { color: var(--color-success); background: var(--color-success-muted); }
.table-status.cancelled { color: var(--color-error); background: var(--color-error-muted); }
.table-status.loading { color: var(--color-warning); background: var(--color-warning-muted); }

/* --- Strategy Grid --- */
.strategy-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  padding: var(--space-5);
}
.strategy-item {
  display: flex;
  gap: var(--space-4);
}
.strategy-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  color: var(--accent);
  flex-shrink: 0;
}
.strategy-content h3 {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}
.strategy-content p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
  max-width: none;
}

/* --- Footer --- */
.dashboard-footer {
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-divider);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.dashboard-footer p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  max-width: none;
  line-height: 1.6;
  flex: 1;
  min-width: 0;
}
.dashboard-footer a {
  color: var(--color-text-muted);
}
.dashboard-footer a:hover {
  color: var(--color-primary);
}
.support-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-warning) !important;
  background: var(--color-warning-muted);
  border: 1px solid color-mix(in srgb, var(--color-warning) 25%, transparent);
  transition: all var(--transition-interactive);
  text-decoration: none !important;
  flex-shrink: 0;
  white-space: nowrap;
}
.support-link:hover {
  background: color-mix(in srgb, var(--color-warning) 20%, transparent);
  transform: translateY(-1px);
}
.support-link svg {
  flex-shrink: 0;
}

/* --- Menu Toggle (mobile/tablet only) --- */
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-right: var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  transition: all var(--transition-interactive);
  flex-shrink: 0;
}
.menu-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
  opacity: 0;
  transition: opacity var(--transition-interactive);
}
.sidebar-backdrop.active {
  opacity: 1;
}

/* --- Responsive --- */
@media (max-width: 1200px) {
  .charts-row {
    grid-template-columns: 1fr 1fr;
  }
  .guarantee-card {
    grid-column: 1 / -1;
  }
  .kpi-row {
    grid-template-columns: repeat(3, 1fr);
  }
  .kpi-row-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .guarantee-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .guarantee-grid .guarantee-item:nth-child(3n) {
    border-right: 1px solid var(--color-divider);
  }
  .guarantee-grid .guarantee-item:nth-child(2n) {
    border-right: none;
  }
}
@media (max-width: 900px) {
  .dashboard {
    grid-template-columns: 1fr;
  }
  .menu-toggle {
    display: inline-flex;
  }
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 260px;
    z-index: 100;
    transform: translateX(-100%);
    transition: transform var(--transition-interactive);
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .sidebar-backdrop.active {
    display: block;
  }
  .header, .main {
    grid-column: 1;
  }
  .kpi-row, .kpi-row-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .charts-row, .charts-row-2 {
    grid-template-columns: 1fr;
  }
  .strategy-grid {
    grid-template-columns: 1fr;
  }
  .guarantee-grid {
    grid-template-columns: 1fr;
  }
  .guarantee-grid .guarantee-item {
    border-right: none;
  }
}
@media (max-width: 600px) {
  .kpi-row {
    grid-template-columns: 1fr;
  }
  .header {
    padding: var(--space-3) var(--space-4);
    gap: var(--space-2);
  }
  .header h1 {
    font-size: var(--text-base);
  }
  .header-subtitle {
    display: none;
  }
  .main {
    padding: var(--space-3);
  }
  .header-right {
    gap: var(--space-2);
  }
  .card-header {
    flex-wrap: wrap;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
  }
  .card-header h2 {
    width: 100%;
  }
  .table-filters {
    flex-wrap: wrap;
    width: 100%;
  }
  .filter-btn {
    padding: var(--space-1) var(--space-2);
    font-size: 11px;
  }
}

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