/* ═════════════════════════════════════════════════════════════
   FUEL DASHBOARD — CUSTOM DESIGN SYSTEM
   ═════════════════════════════════════════════════════════════ */

:root {
  --db-bg: #070c16;
  --db-card: rgba(16, 24, 48, 0.45);
  --db-border: rgba(255, 255, 255, 0.06);
  --db-border-focus: rgba(59, 130, 246, 0.5);
  --db-text: #f3f4f6;
  --db-text-muted: #9ca3af;
  --db-accent: #1a56db;
  --db-accent-glow: rgba(26, 86, 219, 0.25);
  --db-gold: #e8a020;
  --db-gold-glow: rgba(232, 160, 32, 0.25);
  --db-success: #10b981;
  --db-warning: #f59e0b;
  --db-danger: #ef4444;
  --db-sidebar-w: 250px;
}

[data-theme="light"] {
  --db-bg: #f3f4f6;
  --db-card: rgba(255, 255, 255, 0.75);
  --db-border: rgba(0, 0, 0, 0.08);
  --db-border-focus: rgba(26, 86, 219, 0.5);
  --db-text: #111827;
  --db-text-muted: #4b5563;
  --db-accent: #1a56db;
  --db-accent-glow: rgba(26, 86, 219, 0.1);
  --db-gold: #d97706;
  --db-gold-glow: rgba(217, 119, 6, 0.1);
  --db-success: #059669;
  --db-warning: #d97706;
  --db-danger: #dc2626;
}

/* ═══ LOGIN SCREEN ═══════════════════════════════════════════ */
.login-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: radial-gradient(circle at center, rgba(16, 24, 48, 0.95) 0%, rgba(7, 12, 22, 0.98) 100%);
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.4s ease, visibility 0.4s ease;
  backdrop-filter: blur(20px);
}
[data-theme="light"] .login-overlay {
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.95) 0%, rgba(243, 244, 246, 0.98) 100%);
}

.login-card {
  width: 100%; max-width: 440px;
  background: var(--db-card); border: 1px solid var(--db-border);
  border-radius: 16px; padding: 2.5rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), inset 0 0 30px rgba(59, 130, 246, 0.03);
  display: flex; flex-direction: column; gap: 1.5rem;
  position: relative; overflow: hidden;
}
.login-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--db-accent), var(--db-gold));
}

.login-header { text-align: center; margin-bottom: 0.5rem; }
.login-logo { display: inline-flex; align-items: center; justify-content: center; margin-bottom: 1rem; }
.login-title { font-size: 1.5rem; font-weight: 800; color: var(--db-text); }
.login-sub { font-size: 0.85rem; color: var(--db-text-muted); margin-top: 0.25rem; }

.login-field { display: flex; flex-direction: column; gap: 0.5rem; }
.login-label { font-size: 0.75rem; font-weight: 700; color: var(--db-text); text-transform: uppercase; letter-spacing: 0.5px; }
.login-input-wrap { position: relative; }
.login-input {
  width: 100%; padding: 0.75rem 1rem 0.75rem 2.5rem;
  background: rgba(255,255,255,0.03); border: 1px solid var(--db-border);
  border-radius: 8px; color: var(--db-text); font-size: 0.9rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
[data-theme="light"] .login-input { background: rgba(0,0,0,0.02); }
.login-input:focus {
  outline: none; border-color: var(--db-border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}
.login-icon-input { position: absolute; left: 0.85rem; top: 50%; transform: translateY(-50%); color: var(--db-text-muted); pointer-events: none; }

.login-btn {
  background: linear-gradient(90deg, var(--db-accent), #2563eb);
  border: none; border-radius: 8px; color: #fff; padding: 0.85rem;
  font-size: 0.95rem; font-weight: 700; cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}
.login-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4); }
.login-btn:active { transform: translateY(0); }

.demo-shortcuts {
  margin-top: 1rem; border-top: 1px solid var(--db-border); padding-top: 1.25rem;
  display: flex; flex-direction: column; gap: 0.75rem;
}
.demo-title { font-size: 0.7rem; font-weight: 700; color: var(--db-text-muted); text-transform: uppercase; text-align: center; }
.demo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.5rem; }
.demo-chip {
  background: rgba(255,255,255,0.03); border: 1px solid var(--db-border);
  border-radius: 6px; padding: 0.5rem 0.25rem; text-align: center; cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
}
[data-theme="light"] .demo-chip { background: rgba(0,0,0,0.02); }
.demo-chip:hover { background: rgba(59, 130, 246, 0.08); border-color: var(--db-border-focus); }
.demo-chip-name { font-size: 0.7rem; font-weight: 700; color: var(--db-text); }
.demo-chip-role { font-size: 0.55rem; color: var(--db-text-muted); }

/* ═══ DASHBOARD SHELL ════════════════════════════════════════ */
.db-wrapper {
  display: flex; min-height: 100vh; background: var(--db-bg);
  font-family: 'Inter', sans-serif; color: var(--db-text);
  transition: background 0.3s;
}

/* Sidebar */
.db-sidebar {
  width: var(--db-sidebar-w); background: rgba(10, 17, 32, 0.85);
  border-right: 1px solid var(--db-border); display: flex; flex-direction: column;
  z-index: 100; backdrop-filter: blur(16px);
  position: fixed; top: 0; bottom: 0; left: 0;
  transition: background 0.3s, border-color 0.3s;
}
[data-theme="light"] .db-sidebar { background: rgba(255,255,255,0.9); }

.db-brand {
  padding: 1.5rem; border-bottom: 1px solid var(--db-border);
  display: flex; align-items: center; gap: 0.75rem; font-weight: 800; font-size: 1.1rem;
}

.db-menu { padding: 1.5rem 1rem; display: flex; flex-direction: column; gap: 0.5rem; flex: 1; }
.db-menu-item {
  display: flex; align-items: center; gap: 0.85rem; padding: 0.75rem 1rem;
  border-radius: 8px; color: var(--db-text-muted); text-decoration: none;
  font-size: 0.85rem; font-weight: 600; cursor: pointer;
  transition: color 0.2s, background 0.2s;
}
.db-menu-item:hover, .db-menu-item.active {
  color: var(--db-text); background: rgba(255, 255, 255, 0.04);
}
[data-theme="light"] .db-menu-item:hover, [data-theme="light"] .db-menu-item.active {
  background: rgba(0, 0, 0, 0.03);
}
.db-menu-item.active { border-left: 3px solid var(--db-accent); border-radius: 0 8px 8px 0; padding-left: calc(1rem - 3px); }

/* Main Workspace */
.db-main {
  flex: 1; margin-left: var(--db-sidebar-w); display: flex; flex-direction: column;
  min-width: 0; /* Prevents flex items from breaking grid widths */
}

/* Header */
.db-header {
  height: 70px; border-bottom: 1px solid var(--db-border);
  background: rgba(10, 17, 32, 0.3); backdrop-filter: blur(12px);
  padding: 0 2rem; display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 50;
  transition: background 0.3s, border-color 0.3s;
}
[data-theme="light"] .db-header { background: rgba(255,255,255,0.4); }

.db-header-left { display: flex; align-items: center; gap: 1rem; }
.db-header-right { display: flex; align-items: center; gap: 1.25rem; }

.role-badge {
  background: var(--db-accent-glow); border: 1px solid rgba(59,130,246,0.3);
  color: #93c5fd; font-size: 0.65rem; font-weight: 800; padding: 0.25rem 0.6rem;
  border-radius: 20px; text-transform: uppercase; letter-spacing: 0.5px;
  display: inline-flex; align-items: center; gap: 4px;
}
[data-theme="light"] .role-badge { color: var(--db-accent); }
.role-badge.supervisor {
  background: var(--db-gold-glow); border: 1px solid rgba(232,160,32,0.3);
  color: #fcd34d;
}
[data-theme="light"] .role-badge.supervisor { color: #b45309; }

.user-profile { display: flex; align-items: center; gap: 0.75rem; }
.user-avatar { width: 36px; height: 36px; border-radius: 50%; border: 1.5px solid var(--db-accent); }
.user-name { font-size: 0.85rem; font-weight: 700; color: var(--db-text); }
.user-role { font-size: 0.7rem; color: var(--db-text-muted); }

/* Content Area */
.db-content { padding: 2rem; display: flex; flex-direction: column; gap: 2rem; flex: 1; }

/* Filter Bar */
.filter-bar {
  background: var(--db-card); border: 1px solid var(--db-border);
  border-radius: 12px; padding: 1rem 1.5rem; display: flex; justify-content: space-between;
  align-items: center; gap: 1rem; flex-wrap: wrap;
}
.filter-group { display: flex; align-items: center; gap: 0.75rem; }
.filter-label { font-size: 0.75rem; font-weight: 700; color: var(--db-text-muted); text-transform: uppercase; }
.filter-select {
  background: rgba(255,255,255,0.03); border: 1px solid var(--db-border);
  border-radius: 6px; padding: 0.4rem 1.5rem 0.4rem 0.75rem; color: var(--db-text);
  font-size: 0.8rem; font-weight: 600; cursor: pointer; outline: none;
}
[data-theme="light"] .filter-select { background: rgba(0,0,0,0.02); }
.filter-select option {
  background: #0b1329;
  color: #f3f4f6;
}
[data-theme="light"] .filter-select option {
  background: #ffffff;
  color: #111827;
}
.filter-select:disabled { opacity: 0.5; cursor: not-allowed; }

.time-btn-group { display: flex; background: rgba(255,255,255,0.03); border: 1px solid var(--db-border); border-radius: 6px; padding: 2px; }
[data-theme="light"] .time-btn-group { background: rgba(0,0,0,0.02); }
.time-btn {
  background: none; border: none; padding: 0.35rem 0.75rem; border-radius: 4px;
  color: var(--db-text-muted); font-size: 0.75rem; font-weight: 700; cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.time-btn.active { background: var(--db-accent); color: #fff; }

/* ═══ STATS GRID ═════════════════════════════════════════════ */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
@media (max-width: 1024px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 580px) { .stats-grid { grid-template-columns: 1fr; } }

.stat-card {
  background: var(--db-card); border: 1px solid var(--db-border);
  border-radius: 14px; padding: 1.25rem 1.5rem; display: flex; flex-direction: column; gap: 0.5rem;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); position: relative; overflow: hidden;
}
.stat-card-header { display: flex; justify-content: space-between; align-items: center; }
.stat-card-title { font-size: 0.75rem; font-weight: 700; color: var(--db-text-muted); text-transform: uppercase; }
.stat-card-value { font-size: 1.6rem; font-weight: 800; color: var(--db-text); }
.stat-card-trend { font-size: 0.7rem; font-weight: 700; display: inline-flex; align-items: center; gap: 2px; }
.trend-up { color: var(--db-success); }
.trend-down { color: var(--db-danger); }
.stat-icon { width: 32px; height: 32px; border-radius: 8px; background: rgba(59,130,246,0.08); display: flex; align-items: center; justify-content: center; color: var(--db-accent); }

/* ═══ CHARTS GRID ════════════════════════════════════════════ */
.charts-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 1.25rem; }
@media (max-width: 960px) { .charts-grid { grid-template-columns: 1fr; } }

.chart-card {
  background: var(--db-card); border: 1px solid var(--db-border);
  border-radius: 14px; padding: 1.5rem; display: flex; flex-direction: column; gap: 1rem;
}
.chart-header { display: flex; justify-content: space-between; align-items: center; }
.chart-title { font-size: 0.9rem; font-weight: 700; color: var(--db-text); }
.chart-body { flex: 1; min-height: 220px; display: flex; align-items: center; justify-content: center; position: relative; }

/* ═══ TABLES GRID ════════════════════════════════════════════ */
.inventory-card {
  background: var(--db-card); border: 1px solid var(--db-border);
  border-radius: 14px; padding: 1.5rem; display: flex; flex-direction: column; gap: 1rem;
}
.table-scroll { overflow-x: auto; }
.db-table { width: 100%; border-collapse: collapse; text-align: left; }
.db-table th {
  padding: 0.75rem 1rem; border-bottom: 1px solid var(--db-border);
  font-size: 0.75rem; font-weight: 700; color: var(--db-text-muted); text-transform: uppercase;
}
.db-table td { padding: 0.9rem 1rem; border-bottom: 1px solid var(--db-border); font-size: 0.85rem; color: var(--db-text); vertical-align: middle; }

/* Progress bar inside table */
.tbl-bar-container { display: flex; align-items: center; gap: 0.75rem; width: 180px; }
.tbl-bar-wrap { flex: 1; height: 8px; background: rgba(255,255,255,0.06); border-radius: 4px; overflow: hidden; }
[data-theme="light"] .tbl-bar-wrap { background: rgba(0,0,0,0.08); }
.tbl-bar { height: 100%; border-radius: 4px; transition: width 0.4s ease; }

.tbl-badge {
  font-size: 0.65rem; font-weight: 800; padding: 0.15rem 0.5rem; border-radius: 20px;
  text-transform: uppercase; display: inline-flex; align-items: center; gap: 3px;
}
.tbl-badge.normal { background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.3); color: var(--db-success); }
.tbl-badge.warning { background: rgba(245,158,11,0.1); border: 1px solid rgba(245,158,11,0.3); color: var(--db-warning); }
.tbl-badge.danger { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); color: var(--db-danger); }

/* Refill Action Button */
.btn-refill {
  background: var(--db-accent-glow); border: 1px solid rgba(59,130,246,0.3);
  color: #93c5fd; padding: 0.35rem 0.75rem; border-radius: 6px; font-size: 0.75rem;
  font-weight: 700; cursor: pointer; transition: background 0.2s, border-color 0.2s;
  display: inline-flex; align-items: center; gap: 4px;
}
[data-theme="light"] .btn-refill { color: var(--db-accent); }
.btn-refill:hover { background: var(--db-accent); color: #fff; border-color: var(--db-accent); }
.btn-refill:disabled { opacity: 0.4; cursor: not-allowed; }

/* ═══ MODAL SCREEN ═══════════════════════════════════════════ */
.modal-overlay {
  position: fixed; inset: 0; z-index: 1001;
  background: rgba(0, 0, 0, 0.7); backdrop-filter: blur(8px);
  display: none; align-items: center; justify-content: center;
  transition: opacity 0.3s;
}
.modal-overlay.active { display: flex; }
.modal-card {
  width: 100%; max-width: 460px; background: var(--db-bg);
  border: 1px solid var(--db-border); border-radius: 16px; padding: 2rem;
  box-shadow: 0 20px 25px -5px rgba(0,0,0,0.3);
  display: flex; flex-direction: column; gap: 1.25rem;
}
.modal-title { font-size: 1.1rem; font-weight: 800; color: var(--db-text); }
.modal-body { display: flex; flex-direction: column; gap: 1rem; }
.modal-actions { display: flex; justify-content: flex-end; gap: 0.75rem; border-top: 1px solid var(--db-border); padding-top: 1rem; }

.btn-secondary {
  background: rgba(255,255,255,0.03); border: 1px solid var(--db-border);
  color: var(--db-text); padding: 0.5rem 1rem; border-radius: 6px;
  font-size: 0.8rem; font-weight: 700; cursor: pointer; transition: background 0.2s;
}
[data-theme="light"] .btn-secondary { background: rgba(0,0,0,0.02); }
.btn-secondary:hover { background: rgba(255,255,255,0.08); }

.tank-detail-info {
  background: rgba(255,255,255,0.015); border: 1px solid var(--db-border);
  border-radius: 8px; padding: 0.75rem 1rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem;
}
.tank-detail-lbl { font-size: 0.7rem; color: var(--db-text-muted); }
.tank-detail-val { font-size: 0.8rem; font-weight: 700; color: var(--db-text); text-align: right; font-family: 'JetBrains Mono', monospace; }

/* Responsive adjustments for sidebar collapse */
@media (max-width: 768px) {
  .db-sidebar { width: 70px; }
  .db-sidebar .db-menu-item span, .db-sidebar .db-brand span { display: none; }
  .db-sidebar .db-brand { justify-content: center; padding: 1.5rem 0.5rem; }
  .db-main { margin-left: 70px; }
  .db-header { padding: 0 1.25rem; }
}

/* ═══ ROLE INFO CARD ═════════════════════════════════════════ */
.role-info-card {
  background: linear-gradient(135deg, rgba(26, 86, 219, 0.06) 0%, rgba(16, 24, 48, 0.4) 100%);
  border: 1px solid var(--db-border);
  border-radius: 14px;
  padding: 1.5rem;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  margin-bottom: 1.5rem;
}
[data-theme="light"] .role-info-card {
  background: linear-gradient(135deg, rgba(26, 86, 219, 0.04) 0%, rgba(255, 255, 255, 0.8) 100%);
  border: 1px solid rgba(26, 86, 219, 0.15);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
}
.role-info-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.3);
}
.role-info-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid var(--db-border);
  padding-bottom: 0.75rem;
}
.role-info-title {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--db-text);
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.role-info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
@media (max-width: 768px) {
  .role-info-grid {
    grid-template-columns: 1fr;
  }
}
.role-info-section {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.role-info-section-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--db-gold);
  text-transform: uppercase;
  letter-spacing: 0.75px;
  margin-bottom: 0.4rem;
}
.role-info-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--db-text);
  padding: 0.35rem 0;
  border-bottom: 1px dashed var(--db-border);
}
.role-info-label {
  color: var(--db-text-muted);
}
.role-info-val {
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
}