/* ============================================================
   MCCAIN · RASTREO DE EMBARQUES REFRIGERADOS
   Sistema de diseño: cadena de frío / logística
   ============================================================ */

:root{
  /* Paleta - modo claro */
  --bg: #F4F7F9;
  --surface: #FFFFFF;
  --surface-2: #EEF3F6;
  --border: #DCE4EA;
  --text: #10202E;
  --text-muted: #5B7186;
  --text-faint: #8CA0B8;

  --accent: #0B6E99;        /* azul frío - primario */
  --accent-strong: #08526F;
  --accent-tint: #E4F1F6;

  --success: #1F9D6C;
  --success-tint: #E4F6ED;

  --alert: #D6472B;
  --alert-tint: #FBE7E2;

  --font-display: 'Archivo', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;

  --shadow-card: 0 1px 2px rgba(16,32,46,.04), 0 8px 24px -14px rgba(16,32,46,.18);
  --container: 1080px;
}

[data-theme="dark"]{
  --bg: #0B141E;
  --surface: #121D29;
  --surface-2: #16232F;
  --border: #223140;
  --text: #E8EFF4;
  --text-muted: #94A9BB;
  --text-faint: #64798C;

  --accent: #4FC0E0;
  --accent-strong: #7FD4EA;
  --accent-tint: #12303B;

  --success: #3ED18E;
  --success-tint: #103322;

  --alert: #FF6B52;
  --alert-tint: #3A1A16;

  --shadow-card: 0 1px 2px rgba(0,0,0,.3), 0 12px 28px -16px rgba(0,0,0,.55);
}

*{ box-sizing: border-box; }
html{ -webkit-text-size-adjust: 100%; }

body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-feature-settings: "tnum" 1;
  font-variant-numeric: tabular-nums;
  line-height: 1.5;
  transition: background .25s ease, color .25s ease;
}

h1,h2{
  font-family: var(--font-display);
  color: var(--text);
  margin: 0;
}

svg{ display: block; flex-shrink: 0; }

button{ font-family: inherit; }

/* ---------------- Topbar ---------------- */
.topbar{
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}
.topbar-inner{
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.brand{ display: flex; align-items: center; gap: 10px; }
.brand-mark{
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--accent-tint);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
}
.brand-text{ display: flex; flex-direction: column; line-height: 1.2; }
.brand-name{ font-family: var(--font-display); font-weight: 700; font-size: 15px; }
.brand-sub{ font-size: 12px; color: var(--text-muted); }

.theme-toggle{
  width: 38px; height: 38px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-muted);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.theme-toggle:hover{ color: var(--accent); border-color: var(--accent); }
.icon-moon{ display: none; }
[data-theme="dark"] .icon-sun{ display: none; }
[data-theme="dark"] .icon-moon{ display: block; }

/* ---------------- Layout ---------------- */
main{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px 64px;
}

/* ---------------- Buscador (hero) ---------------- */
.search-hero{
  padding: 48px 0 28px;
  text-align: left;
  max-width: 640px;
}
.search-hero h1{
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.search-hint{
  margin: 10px 0 22px;
  color: var(--text-muted);
  font-size: 15px;
  max-width: 52ch;
}
.search-box{
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 6px 6px 6px 16px;
  box-shadow: var(--shadow-card);
}
.search-box:focus-within{
  border-color: var(--accent);
}
.search-icon{ color: var(--text-faint); }
.search-box input{
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text);
  font-size: 16px;
  padding: 12px 0;
  min-width: 0;
}
.search-box input::placeholder{ color: var(--text-faint); }
.btn-search{
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: calc(var(--radius-md) - 4px);
  padding: 12px 20px;
  font-weight: 600;
  font-size: 14.5px;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s ease;
}
.btn-search:hover{ background: var(--accent-strong); }

.search-examples{
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-faint);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.chip-example{
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--accent);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 12.5px;
  cursor: pointer;
}
.chip-example:hover{ border-color: var(--accent); }

/* ---------------- Estados ---------------- */
.state-panel{
  max-width: 420px;
  margin: 40px auto;
  text-align: center;
  color: var(--text-muted);
  padding: 32px 20px;
}
.state-panel h2{ font-size: 18px; margin: 14px 0 6px; color: var(--text); }
.state-panel svg{ margin: 0 auto; color: var(--text-faint); }
.spinner{
  width: 30px; height: 30px;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  margin: 0 auto 14px;
  animation: spin .8s linear infinite;
}
@keyframes spin{ to{ transform: rotate(360deg); } }

/* ---------------- Journey track ---------------- */
.journey{
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-card);
}
.journey-step{
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.journey-dot{
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--border);
  border: 2px solid var(--border);
}
.journey-step.is-done .journey-dot{ background: var(--success); border-color: var(--success); }
.journey-step.is-current .journey-dot{ background: var(--accent); border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-tint); }
.journey-label{ font-size: 12.5px; color: var(--text-muted); font-weight: 600; }
.journey-value{ font-size: 13.5px; color: var(--text); }
.journey-line{
  flex: 1;
  height: 2px;
  background: var(--border);
  margin: 0 14px;
  min-width: 24px;
}

/* ---------------- Secciones / tarjetas ---------------- */
.section-block{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 24px 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-card);
}
.section-head{
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.section-head h2{ font-size: 15px; font-weight: 700; letter-spacing: .01em; }

.two-col{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.two-col .section-block{ margin-bottom: 0; }

/* KPI cards */
.kpi-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}
.kpi-card{
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.kpi-label{ font-size: 12px; color: var(--text-muted); font-weight: 600; }
.kpi-value{ font-size: 17px; font-weight: 700; color: var(--text); word-break: break-word; }

/* Data list rows */
.data-list{ list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.data-list li{
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 4px;
  border-bottom: 1px solid var(--border);
}
.data-list li:last-child{ border-bottom: none; }
.data-list svg{ color: var(--accent); }
.data-label{ color: var(--text-muted); font-size: 13.5px; flex: 1; }
.data-value{ font-weight: 600; font-size: 14px; text-align: right; }

/* Evidencia chips */
.chip-row{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}
.stat-chip{
  background: var(--success-tint);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.stat-chip .data-label{ flex: none; }
.stat-chip .data-value{ text-align: left; font-size: 16px; }
.stat-chip.is-alert{ background: var(--alert-tint); }
.stat-chip.is-pending{ background: var(--surface-2); }
.stat-chip.is-pending .data-value{ color: var(--text-faint); font-weight: 500; }

/* ---------------- Gráfica ---------------- */
.chart-head{ flex-wrap: wrap; gap: 10px; }
.chart-controls{ display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.range-pills{ display: flex; gap: 6px; background: var(--surface-2); padding: 4px; border-radius: 999px; border: 1px solid var(--border); }
.pill{
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 12.5px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
}
.pill.is-active{ background: var(--accent); color: #fff; }
.btn-ghost{
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 12.5px;
  font-weight: 600;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.btn-ghost:hover{ border-color: var(--accent); color: var(--accent); }

.chart-alert{
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--alert-tint);
  color: var(--alert);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 14px;
}

.chart-wrap{ position: relative; height: 320px; }
.chart-caption{ margin: 10px 2px 0; font-size: 12px; color: var(--text-faint); }

/* ---------------- Footer ---------------- */
.page-footer{
  text-align: center;
  font-size: 12px;
  color: var(--text-faint);
  padding: 24px 20px 40px;
}

/* ---------------- Responsive ---------------- */
@media (max-width: 860px){
  .two-col{ grid-template-columns: 1fr; }
}

@media (max-width: 620px){
  .search-hero{ padding: 32px 0 22px; }
  .journey{ flex-direction: column; align-items: stretch; gap: 14px; padding: 18px; }
  .journey-line{ display: none; }
  .section-block{ padding: 18px 16px 20px; }
  .chart-wrap{ height: 260px; }
  .search-box{ flex-wrap: wrap; padding: 10px; }
  .search-box input{ width: 100%; order: 1; padding: 8px 4px; }
  .btn-search{ order: 2; flex: 1; }
  .search-icon{ order: 0; }
}

/* Accesibilidad: foco visible */
a:focus-visible, button:focus-visible, input:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Respeta preferencia de movimiento reducido */
@media (prefers-reduced-motion: reduce){
  *{ animation-duration: .001ms !important; transition-duration: .001ms !important; }
}