:root {
  --primary-color: #0056D2;
  --primary-dark: #0041a3;
  --accent-color: #FF8C00;
  --accent-hover: #e67e00;
  --bg-color: #F8F9FA;
  --card-bg: #FFFFFF;
  --text-color: #2D3748;
  --border-color: #E2E8F0;
  --danger-color: #E53E3E;
  --success-color: #38A169;
}

* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.5;
}

h1, h2, h3 {
  margin-top: 0;
  color: var(--primary-color);
}

/* Utilities */
.hidden { display: none !important; }
.mt-2 { margin-top: 0.5rem; }

/* Login Screen */
#login-screen {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: white;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.login-container {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  text-align: center;
  max-width: 400px;
  width: 90%;
  border: 1px solid var(--border-color);
}

.login-logo {
  height: 80px;
  margin-bottom: 1rem;
}

.input-group {
  display: flex;
  gap: 10px;
  margin: 1rem 0;
}

.input-group-vertical {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin: 1.5rem 0 0.5rem 0;
}

.btn-full {
  width: 100%;
  text-decoration: none;
  display: block;
  text-align: center;
}

.tiny-text {
  font-size: 0.8rem;
  color: #718096;
  margin: 0;
}

/* Layout */
header {
  background: white;
  padding: 1rem 2rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.app-logo {
  height: 40px;
}

header h1 {
  margin: 0;
  font-size: 1.5rem;
}

main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1rem 2rem;
}

/* Controls */
.dashboard-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

#vehicleSelect {
  padding: 0.5rem 1rem;
  font-size: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  min-width: 200px;
}

.action-buttons {
  display: flex;
  gap: 8px;
}

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: 10px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.03);
  border: 1px solid var(--border-color);
}

.forms-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 768px) {
  .forms-grid { grid-template-columns: 1fr 1fr; }
}

/* Forms */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

input {
  padding: 0.6rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.95rem;
}

/* Buttons */
button {
  cursor: pointer;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  border: none;
  font-weight: 600;
  transition: background 0.2s;
}

.btn-primary { background: var(--primary-color); color: white; }
.btn-primary:hover { background: var(--primary-dark); }

.btn-secondary { background: #EDF2F7; color: var(--text-color); }
.btn-secondary:hover { background: #E2E8F0; }

.btn-success { background: var(--accent-color); color: white; }
.btn-success:hover { background: var(--accent-hover); }

/* Table */
.table-responsive { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 0.8rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th { color: var(--text-color); font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.5px; }

/* Timeline */
#timeline {
  list-style: none;
  padding: 0;
  margin: 0;
}

#timeline li {
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
}
#timeline li:last-child { border-bottom: none; }

/* Status Rows for Reminders */
tr.status-danger td {
  background-color: #ffeaea;
}
tr.status-danger td:first-child {
  border-left: 5px solid var(--danger-color);
}

tr.status-warning td {
  background-color: #fffaf0;
}
tr.status-warning td:first-child {
  border-left: 5px solid var(--accent-color);
}

tr.status-ok td {
   /* No background for clean look, or very light green */
}
tr.status-ok td:first-child {
  border-left: 5px solid var(--success-color);
}

/* Tab Navigation */
.tab-menu {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 10px;
  flex-wrap: wrap; /* responsive */
}

.tab-btn {
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-color);
  padding: 10px 20px;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.2s;
}

.tab-btn:hover {
  background-color: rgba(255, 140, 0, 0.1);
  color: var(--accent-color);
}

.tab-btn.active {
  background-color: transparent;
  color: var(--accent-color);
  border-bottom: 2px solid var(--accent-color);
}

/* Tab Content */
.tab-content {
  display: none;
  animation: fadeIn 0.3s ease-in-out;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

/* SVG Icons Styles */
.icon {
  width: 20px;
  height: 20px;
  vertical-align: text-bottom;
  margin-right: 8px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}