:root {
  --color-primary: #0f6e5c;
  --color-primary-dark: #0b5445;
  --color-primary-light: #e2f3ef;
  --color-dark: #111827;
  --color-text: #374151;
  --color-muted: #6b7280;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f6f8;
  --color-border: #e5e7eb;
  --color-success: #157347;
  --color-error: #c8102e;
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 10px;
  --container-width: 1080px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg-alt);
  line-height: 1.55;
}

h1, h2, h3 { color: var(--color-dark); margin: 0 0 0.5em; }
h1 { font-size: 1.7rem; }
h2 { font-size: 1.25rem; }
p { margin: 0 0 1em; }
a { color: var(--color-primary); text-decoration: none; }
a:hover, a:focus { text-decoration: underline; }

.container { max-width: var(--container-width); margin: 0 auto; padding: 0 20px; }

.btn {
  display: inline-block;
  padding: 0.6em 1.2em;
  border-radius: var(--radius);
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  font-size: 0.95rem;
}
.btn:hover, .btn:focus { text-decoration: none; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover, .btn-primary:focus { background: var(--color-primary-dark); color: #fff; }
.btn-secondary { background: transparent; color: var(--color-dark); border-color: var(--color-border); }
.btn-secondary:hover, .btn-secondary:focus { border-color: var(--color-primary); color: var(--color-primary); }
.btn-sm { padding: 0.4em 0.9em; font-size: 0.85rem; }

.app-header { background: var(--color-dark); color: #fff; }
.app-header-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; flex-wrap: wrap; gap: 8px; }
.app-header .logo { color: #fff; font-weight: 700; }
.app-nav { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.app-nav a, .app-nav span { color: #cbd2dc; font-weight: 500; font-size: 0.92rem; }
.app-nav a:hover, .app-nav a:focus { color: #fff; }
.app-main { padding: 32px 0 64px; }

.nav-dropdown { position: relative; }
.nav-dropdown > summary { list-style: none; cursor: pointer; }
.nav-dropdown > summary::-webkit-details-marker { display: none; }
.nav-dropdown > summary::after { content: " ▾"; font-size: 0.75em; }
.nav-dropdown[open] > summary { color: #fff; }
.nav-dropdown-menu { position: absolute; top: calc(100% + 10px); left: 0; background: #1f2531; border: 1px solid #3a4250; border-radius: var(--radius); padding: 6px; display: flex; flex-direction: column; min-width: 160px; z-index: 10; }
.nav-dropdown-menu a { padding: 6px 10px; border-radius: 6px; white-space: nowrap; }
.nav-dropdown-menu a:hover, .nav-dropdown-menu a:focus { background: #2a3140; text-decoration: none; }

.selector-empresa { display: flex; align-items: center; gap: 6px; color: #cbd2dc; font-size: 0.92rem; }
.selector-empresa select { padding: 0.2em 0.5em; border-radius: 6px; border: 1px solid #3a4250; background: #1f2531; color: #fff; font: inherit; }

.link-button { background: none; border: none; padding: 0; color: inherit; font: inherit; cursor: pointer; text-decoration: underline; }
.link-button.danger { color: var(--color-error); }
.logout-form { display: inline; }

.auth-panel { max-width: 440px; margin: 60px auto; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 32px; }
.auth-form .form-group { margin-bottom: 16px; }
.auth-secondary { margin-top: 16px; font-size: 0.9rem; color: var(--color-muted); }

.page-heading { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; margin-bottom: 20px; }

.table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); margin-bottom: 24px; }
.data-table { width: 100%; border-collapse: collapse; min-width: 560px; }
.data-table th, .data-table td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--color-border); font-size: 0.9rem; }
.data-table th { background: var(--color-bg-alt); font-weight: 600; color: var(--color-dark); }
.table-actions { display: flex; gap: 10px; white-space: nowrap; }

.badge { display: inline-block; padding: 0.2em 0.7em; border-radius: 999px; font-size: 0.78rem; font-weight: 600; }
.badge-vehiculo { background: var(--color-primary-light); color: var(--color-primary-dark); }
.badge-embarcacion { background: #e4ecf7; color: #1d4ed8; }
.badge-otro_activo { background: #fdf1d6; color: #92600a; }
.badge-aprobada { background: var(--color-primary-light); color: var(--color-success); }
.badge-pendiente { background: #fdf1d6; color: #92600a; }
.badge-rechazada { background: #fbe1e4; color: var(--color-error); }

.badge-operativo { background: var(--color-primary-light); color: var(--color-success); }
.badge-mantenimiento { background: #fdf1d6; color: #92600a; }
.badge-fuera_servicio { background: #fbe1e4; color: var(--color-error); }
.badge-baja { background: #e5e7eb; color: var(--color-muted); }

.admin-form { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 20px; margin-bottom: 24px; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; }
.form-group-wide { grid-column: 1 / -1; }
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 5px; color: var(--color-dark); font-size: 0.9rem; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 0.55em 0.75em; border: 1px solid var(--color-border); border-radius: 8px; font: inherit; background: #fff;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: 2px solid var(--color-primary); outline-offset: 1px; }
.field-hint { display: block; font-size: 0.82rem; color: var(--color-muted); margin-top: 4px; }

.form-status { margin-top: 12px; font-weight: 600; }
.form-status.error { color: var(--color-error); }
.form-status.success { color: var(--color-success); }

.ficha-vehiculo { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 20px; margin-bottom: 24px; }
.ficha-vehiculo dl { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin: 0; }
.ficha-vehiculo dt { font-size: 0.78rem; color: var(--color-muted); text-transform: uppercase; letter-spacing: 0.02em; }
.ficha-vehiculo dd { margin: 2px 0 0; font-weight: 600; color: var(--color-dark); }

.empty-state { padding: 24px; text-align: center; color: var(--color-muted); }

.dashboard-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; margin: 20px 0; }
.dashboard-card { display: block; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 18px; text-align: center; }
.dashboard-card h3 { font-size: 1.9rem; color: var(--color-primary); margin-bottom: 0.2em; }
.dashboard-card p { color: var(--color-muted); margin: 0; font-size: 0.88rem; }

.aviso-pendientes { border-color: #92600a; background: #fdf8ee; }

.proximamente { background: #f5f6f8; border: 1px dashed var(--color-border); border-radius: var(--radius); padding: 20px; margin-bottom: 24px; }
.proximamente h3 { margin: 0 0 8px; font-size: 1rem; }
.proximamente ul { margin: 0; padding-left: 20px; color: var(--color-muted); font-size: 0.9rem; }

.hero { padding: 56px 0; }
.hero-inner { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero-text h1 { font-size: 2.2rem; line-height: 1.15; margin-bottom: 0.4em; }
.hero-subtitle { color: var(--color-muted); font-size: 1.05rem; max-width: 46ch; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 20px; }
.hero-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(17, 24, 39, 0.12);
}

.features { padding: 8px 0 64px; }
.features h2 { text-align: center; margin-bottom: 28px; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }
.feature-card { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 22px; }
.feature-card h3 { font-size: 1.05rem; margin-bottom: 0.4em; color: var(--color-primary-dark); }
.feature-card p { margin: 0; color: var(--color-muted); font-size: 0.92rem; }

@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-image { order: -1; }
}

@media (max-width: 720px) {
  .app-nav { width: 100%; flex-direction: column; align-items: flex-start; gap: 8px; padding-bottom: 10px; }
}