/* ==========================================================================
   Buscador del tiempo histórico: ¿Qué tiempo hizo el día que naciste?
   Estándar de diseño canónico fijate.com (Dark Mode nativo, acentos celeste y ámbar)
   ========================================================================== */

:root {
  --bg-page: #0b0f17;
  --bg-card: #131b28;
  --bg-card-hover: #182335;
  --bg-surface: #1e293b;
  --border-color: #24344d;
  --border-focus: #38bdf8;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #38bdf8;
  --accent-hover: #0284c7;
  --accent-light: rgba(56, 189, 248, 0.15);
  --accent-glow: rgba(56, 189, 248, 0.3);
  --sun-gold: #f59e0b;
  --sun-gold-light: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --success: #10b981;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.5);
  --shadow-hover: 0 10px 30px -4px rgba(0, 0, 0, 0.7);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-title: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

[data-theme="light"] {
  --bg-page: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-surface: #e2e8f0;
  --border-color: #cbd5e1;
  --border-focus: #0284c7;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --accent: #0284c7;
  --accent-hover: #0369a1;
  --accent-light: rgba(2, 132, 199, 0.12);
  --accent-glow: rgba(2, 132, 199, 0.25);
  --sun-gold: #d97706;
  --sun-gold-light: rgba(217, 119, 6, 0.12);
  --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 10px 30px -4px rgba(0, 0, 0, 0.15);
}

/* Reset y contención */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  overflow-x: clip;
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-page);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Layout institucional */
.tool-layout {
  max-width: 1240px;
  width: 100%;
  margin: 1.5rem auto 3.5rem;
  padding: 0 1rem;
  flex: 1 0 auto;
}

.tool-with-sidebar {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

.tool-main-content {
  flex: 1 1 0%;
  min-width: 0;
  width: 100%;
}

.tool-ad-sidebar {
  display: none;
  width: 300px;
  flex-shrink: 0;
}

@media (min-width: 1536px) {
  .tool-ad-sidebar {
    display: block;
  }
}

.ad-sticky-box {
  position: sticky;
  top: 90px;
}

/* Formulario principal de búsqueda */
.weather-search-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  margin-bottom: 2rem;
}

.search-intro-title {
  font-family: var(--font-title);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 0.5rem 0;
}

.search-intro-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin: 0 0 1.5rem 0;
}

.search-form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

@media (min-width: 768px) {
  .search-form-grid {
    grid-template-columns: 1fr 1.2fr auto;
    align-items: flex-end;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  position: relative;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.form-label svg {
  color: var(--accent);
  stroke: var(--accent);
  flex-shrink: 0;
}

.form-input,
.form-select {
  width: 100%;
  height: 48px;
  min-height: 40px;
  padding: 0 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

/* Corrección de contraste para inputs de fecha y selector de calendario nativo */
input[type="date"].form-input {
  color-scheme: dark;
  cursor: pointer;
}

[data-theme="light"] input[type="date"].form-input {
  color-scheme: light;
}

input[type="date"]::-webkit-calendar-picker-indicator {
  cursor: pointer;
  filter: invert(0.9) brightness(1.2);
  opacity: 0.85;
  padding: 4px;
  border-radius: 4px;
  transition: all 0.2s ease;
}

input[type="date"]::-webkit-calendar-picker-indicator:hover {
  opacity: 1;
  filter: invert(1) brightness(1.4);
  background-color: rgba(56, 189, 248, 0.15);
  transform: scale(1.1);
}

[data-theme="light"] input[type="date"]::-webkit-calendar-picker-indicator {
  filter: none;
  opacity: 0.75;
}

[data-theme="light"] input[type="date"]::-webkit-calendar-picker-indicator:hover {
  opacity: 1;
  background-color: rgba(2, 132, 199, 0.1);
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.form-select {
  max-width: 100%;
  min-width: 0;
  appearance: none;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  padding-right: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2338bdf8' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 16px;
  cursor: pointer;
}

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

.btn-submit-search {
  height: 48px;
  min-height: 40px;
  padding: 0 1.75rem;
  background: linear-gradient(135deg, #0284c7 0%, #38bdf8 100%);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  transition: all 0.2s ease;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.4);
}

.btn-submit-search:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(2, 132, 199, 0.6);
  filter: brightness(1.08);
}

/* Menú flotante de autocompletado geográfico */
.autocomplete-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-hover);
  max-height: 240px;
  overflow-y: auto;
  z-index: 100;
  display: none;
}

.autocomplete-item {
  padding: 10px 14px;
  font-size: 0.9rem;
  color: var(--text-primary);
  cursor: pointer;
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.15s;
}

.autocomplete-item:last-child {
  border-bottom: none;
}

.autocomplete-item:hover {
  background-color: var(--bg-surface);
  color: var(--accent);
}

/* Píldoras de eventos históricos célebres */
.historic-dates-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
}

.historic-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-right: 0.25rem;
}

.btn-quick-date {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  height: 34px;
  padding: 0 0.85rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-quick-date:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--accent);
  color: var(--text-primary);
}

/* Certificado de Recuerdo Climático (Estilo Diploma / Tarjeta Prémium) */
.certificate-container {
  background: linear-gradient(145deg, rgba(30, 41, 59, 0.85) 0%, rgba(19, 27, 40, 0.95) 100%);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: 0 10px 40px -5px rgba(0, 0, 0, 0.6);
  position: relative;
  overflow: hidden;
  margin-bottom: 2rem;
}

.certificate-watermark {
  position: absolute;
  right: -40px;
  bottom: -40px;
  font-size: 14rem;
  opacity: 0.04;
  user-select: none;
  pointer-events: none;
}

.certificate-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.25rem;
}

.cert-stamp-box {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.cert-weather-icon {
  font-size: 3.25rem;
  line-height: 1;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.4));
}

.cert-title-group h2 {
  font-family: var(--font-title);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.2;
}

.cert-title-group p {
  font-size: 0.95rem;
  color: var(--accent);
  margin: 4px 0 0 0;
  font-weight: 600;
}

.cert-badge-date {
  background: var(--accent-light);
  border: 1px solid var(--accent);
  color: var(--text-primary);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
}

.certificate-narrative-box {
  background: rgba(11, 15, 23, 0.6);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
}

.certificate-narrative-text {
  font-size: 1.15rem;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.6;
  font-style: italic;
}

/* Grilla métrica del certificado */
.cert-metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.cert-metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.cert-metric-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.cert-metric-value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0;
}

.cert-metric-sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Gráfico de evolución 24 horas en Canvas 2D */
.hourly-chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-card);
}

.hourly-chart-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.hourly-chart-title {
  font-family: var(--font-title);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.hourly-chart-legend {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.legend-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 4px;
}

.canvas-wrapper {
  position: relative;
  width: 100%;
  height: 240px;
}

#chart-24h-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Acciones y exportación */
.cert-actions-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.btn-action-cert {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  height: 44px;
  min-height: 40px;
  padding: 0 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-primary);
}

.btn-action-cert:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
}

.btn-action-primary {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}

.btn-action-primary:hover {
  background: var(--accent-hover);
}

/* Estado de carga */
.status-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3.5rem 1.5rem;
  text-align: center;
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.spinner-weather {
  width: 44px;
  height: 44px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Toast de avisos */
.toast-msg {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 10000;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent);
  color: var(--text-primary);
  padding: 0.9rem 1.3rem;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
  font-size: 0.9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}