/* ================================
   CHECK APP — ESTILOS GLOBALES
   ================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --color-bg:         #0a0a0a;
  --color-bg-card:    #1a1a1a;
  --color-bg-input:   #222222;
  --color-primary:    #00c853;
  --color-primary-dark: #009624;
  --color-white:      #ffffff;
  --color-text:       #e0e0e0;
  --color-text-muted: #888888;
  --color-border:     #333333;
  --color-verde:      #00c853;
  --color-amarillo:   #ffab00;
  --color-rojo:       #ff1744;
  --font-main:        'Segoe UI', system-ui, -apple-system, sans-serif;
  --radius:           12px;
  --radius-sm:        8px;
  --shadow:           0 4px 20px rgba(0,0,0,0.4);
}

html, body {
  height: 100%;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.5;
  overflow-x: hidden;
}

/* ================================
   CONTENEDOR PRINCIPAL
   ================================ */
.app-container {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: 80px;
}

/* ================================
   HEADER
   ================================ */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.app-header h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 2px;
}

/* ================================
   CARDS
   ================================ */
.card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius);
  padding: 20px;
  margin: 12px 16px;
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
}

/* ================================
   BOTONES
   ================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  border: none;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  width: 100%;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #000000;
}

.btn-primary:active {
  background-color: var(--color-primary-dark);
  transform: scale(0.98);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-danger {
  background-color: var(--color-rojo);
  color: var(--color-white);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
  width: auto;
}

/* ================================
   FORMULARIOS
   ================================ */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background-color: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 15px;
  font-family: var(--font-main);
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
}

.form-group textarea {
  resize: none;
  height: 100px;
}

.form-group select option {
  background-color: var(--color-bg-card);
}

.input-valid {
  border-color: var(--color-verde) !important;
}

.input-error {
  border-color: var(--color-rojo) !important;
}

.input-hint {
  font-size: 12px;
  margin-top: 4px;
  color: var(--color-text-muted);
}

.input-hint.error { color: var(--color-rojo); }
.input-hint.success { color: var(--color-verde); }

/* ================================
   INDICADOR DE ESTADO
   ================================ */
.estado-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.estado-verde {
  background-color: rgba(0, 200, 83, 0.15);
  color: var(--color-verde);
  border: 1px solid var(--color-verde);
}

.estado-amarillo {
  background-color: rgba(255, 171, 0, 0.15);
  color: var(--color-amarillo);
  border: 1px solid var(--color-amarillo);
}

.estado-rojo {
  background-color: rgba(255, 23, 68, 0.15);
  color: var(--color-rojo);
  border: 1px solid var(--color-rojo);
}

/* ================================
   LISTA DE INTERVENCIONES
   ================================ */
.intervencion-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background-color: var(--color-bg-card);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: border-color 0.2s;
}

.intervencion-item:active {
  border-color: var(--color-primary);
}

.intervencion-tipo {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-white);
}

.intervencion-fecha {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* ================================
   BOTTOM NAVIGATION
   ================================ */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  background-color: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-around;
  padding: 10px 0 20px;
  z-index: 100;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 11px;
  cursor: pointer;
  transition: color 0.2s;
  background: none;
  border: none;
  padding: 4px 16px;
}

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

.nav-icon {
  font-size: 22px;
}

/* ================================
   PANTALLA DE BIENVENIDA / LOGIN
   ================================ */
.splash-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 40px 24px;
  text-align: center;
}

.splash-logo {
  font-size: 64px;
  margin-bottom: 8px;
}

.splash-title {
  font-size: 42px;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: 4px;
  margin-bottom: 8px;
}

.splash-subtitle {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 48px;
}

/* ================================
   MENSAJES Y ALERTAS
   ================================ */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-bottom: 16px;
}

.alert-error {
  background-color: rgba(255, 23, 68, 0.1);
  border: 1px solid var(--color-rojo);
  color: var(--color-rojo);
}

.alert-success {
  background-color: rgba(0, 200, 83, 0.1);
  border: 1px solid var(--color-verde);
  color: var(--color-verde);
}

/* ================================
   UTILIDADES
   ================================ */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.text-primary { color: var(--color-primary); }
.text-danger { color: var(--color-rojo); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.divider {
  height: 1px;
  background-color: var(--color-border);
  margin: 16px 0;
}

/* ================================
   LOADING SPINNER
   ================================ */
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 40px auto;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}