@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --bg-color: #0f172a;
  --card-bg: #1e293b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent: #f97316;
  --accent-hover: #ea580c;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --success: #22c55e;
  --warning: #f59e0b;
  --border-color: #334155;
  --input-bg: #0f172a;
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 70px; /* Space for bottom nav */
}

a {
  color: var(--accent);
  text-decoration: none;
}

/* Layout */
.container {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  padding: 1rem;
}

.card {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--border-color);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-lg { font-size: 1.125rem; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }

/* Margins */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  min-height: 48px; /* Touch target */
  width: 100%;
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--accent);
  color: white;
}
.btn-primary:hover, .btn-primary:active {
  background-color: var(--accent-hover);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover, .btn-secondary:active {
  background-color: var(--card-bg);
}

.btn-danger {
  background-color: var(--danger);
  color: white;
}
.btn-danger:hover, .btn-danger:active {
  background-color: var(--danger-hover);
}

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

input, select, textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-main);
  font-family: inherit;
  font-size: 1rem;
  min-height: 48px; /* Touch target */
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(249, 115, 22, 0.2);
}

.input-km {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: 2px;
  height: 80px;
  color: var(--accent);
  background-color: var(--bg-color);
}

/* Navigation Bar */
.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand span {
  color: var(--accent);
}

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--card-bg);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-around;
  padding: 0.5rem 0;
  z-index: 50;
  padding-bottom: calc(0.5rem + env(safe-area-inset-bottom));
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 0.5rem;
  min-width: 64px;
}

.nav-item.active {
  color: var(--accent);
}

.nav-item svg {
  width: 24px;
  height: 24px;
  margin-bottom: 4px;
}

/* Badges / Urgency */
.badge {
  display: inline-flex;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.badge-ok, .urgency-ok { background-color: rgba(34, 197, 94, 0.1); color: var(--success); border: 1px solid var(--success); }
.badge-upcoming, .urgency-upcoming { background-color: rgba(245, 158, 11, 0.1); color: var(--warning); border: 1px solid var(--warning); }
.badge-due, .urgency-due { background-color: rgba(249, 115, 22, 0.1); color: var(--accent); border: 1px solid var(--accent); }
.badge-overdue, .urgency-overdue { background-color: rgba(239, 68, 68, 0.1); color: var(--danger); border: 1px solid var(--danger); }

/* Timeline */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--border-color);
}

.timeline-item {
  position: relative;
  margin-bottom: 1.5rem;
}

.timeline-dot {
  position: absolute;
  left: -2rem;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--accent);
  border: 2px solid var(--card-bg);
  box-shadow: 0 0 0 2px var(--accent);
}

/* Animations */
.fade-in {
  animation: fadeIn 0.3s ease-in;
}

.slide-up {
  animation: slideUp 0.4s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
}

.modal {
  background-color: var(--card-bg);
  border-radius: 12px;
  width: 100%;
  max-width: 400px;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
}

/* Tables (Admin) */
table {
  width: 100%;
  border-collapse: collapse;
}

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

th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.875rem;
}

/* Desktop Overrides */
@media (min-width: 768px) {
  body {
    padding-bottom: 0;
  }
  .bottom-nav {
    display: none;
  }
  .container {
    max-width: 1000px;
    padding: 2rem;
  }
}

/* Responsive Admin Tables */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    width: 100%;
    margin-bottom: 1rem;
    border-radius: 8px;
    background: var(--card-bg);
}
@media (max-width: 768px) {
    .admin-metrics {
        flex-direction: column;
    }
}