/* ========================================================================= */
/* 01 — Design tokens (CSS custom properties)                                 */
/* ========================================================================= */

:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --surface-hover: #f0f0f5;
  --border: #e2e2e8;
  --text: #1a1a2e;
  --text-muted: #6b7280;
  --accent: #4f46e5;
  --accent-light: #6366f1;
  --green: #059669;
  --blue: #4f46e5;
  --chip-bg: #eef2ff;
  --chip-active-bg: #4f46e5;
  --chip-active-text: #ffffff;
}

/* ========================================================================= */
/* 02 — Reset + base typography                                               */
/* ========================================================================= */

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ========================================================================= */
/* 03 — Layout primitives (header, op-tabs, filters, search-bar,              */
/*       more-filters, results-bar)                                           */
/* ========================================================================= */

header {
  padding: 1.5rem 2rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

header h1 {
  font-size: 1.4rem;
  font-weight: 600;
}

header h1 span { color: var(--accent); }

.meta {
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: right;
}

/* Operation tabs */
.op-tabs {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem 2rem 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.op-tab {
  background: transparent;
  color: var(--text-muted);
  border: none;
  border-bottom: 2px solid transparent;
  padding: 0.6rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color 0.15s, border-color 0.15s;
}

.op-tab:hover { color: var(--text); }

.op-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.search-bar {
  padding: 0.75rem 2rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.search-bar input[type="search"] {
  flex: 1;
  min-width: 240px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.55rem 0.75rem;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

.search-bar input[type="search"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.15);
}

.filters {
  padding: 1rem 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: flex-end;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.filter-group label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
}

/* Secondary filter row ("Más filtros") */
.more-filters {
  padding: 0.75rem 2rem 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.25rem;
  align-items: flex-end;
}

.more-filters .mf-heading {
  width: 100%;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: -0.25rem;
}

.results-bar {
  padding: 0.75rem 2rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

footer {
  padding: 1rem 2rem 2rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-align: center;
}

/* ========================================================================= */
/* 04 — Chips + source chip groups                                            */
/* ========================================================================= */

.source-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.chip {
  background: var(--chip-bg);
  color: var(--accent);
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  transition: all 0.15s;
}

.chip:hover { border-color: var(--accent); }

.chip.active {
  background: var(--chip-active-bg);
  color: var(--chip-active-text);
}

/* ========================================================================= */
/* 05 — Controls (select, input, price-range, btn-clear, view-switch)         */
/* ========================================================================= */

select, input[type="number"] {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.45rem 0.6rem;
  font-size: 0.85rem;
  min-width: 120px;
  outline: none;
  transition: border-color 0.2s;
}

select:focus, input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.15);
}

input[type="number"] { width: 110px; }

.price-range {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.price-range span { color: var(--text-muted); font-size: 0.85rem; }

.btn-clear {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 0.45rem 0.8rem;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
  align-self: flex-end;
}

.btn-clear:hover { background: var(--accent); color: white; }

.view-switch {
  display: inline-flex;
  gap: 0.3rem;
}

.view-switch .chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.6rem;
  font-size: 0.78rem;
}

.view-switch .chip svg { display: block; }

/* .view-switch .vs-label — text label hidden on narrow screens (see responsive rule below). */

/* ========================================================================= */
/* 06 — Grid container + view-mode modifiers                                  */
/*       (view-list / view-grid-small / view-grid-medium / view-grid-large)   */
/* ========================================================================= */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
  padding: 0 2rem 2rem;
}

/* View modes — CSS-only layout swap, no re-render. */
.grid.view-grid-medium {
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

.grid.view-grid-small {
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.75rem;
}
.grid.view-grid-small .card-img,
.grid.view-grid-small .card-img-placeholder { height: 140px; }
.grid.view-grid-small .card-body { padding: 0.7rem 0.85rem 0.9rem; gap: 0.35rem; }
.grid.view-grid-small .card-price { font-size: 1.05rem; }
.grid.view-grid-small .card-address { font-size: 0.85rem; }
.grid.view-grid-small .card-cta { font-size: 0.72rem; }

.grid.view-grid-large {
  grid-template-columns: repeat(auto-fill, minmax(460px, 1fr));
  gap: 1.5rem;
}
.grid.view-grid-large .card-img,
.grid.view-grid-large .card-img-placeholder { height: 260px; }
.grid.view-grid-large .card-body { padding: 1.25rem 1.4rem 1.5rem; gap: 0.7rem; }
.grid.view-grid-large .card-price { font-size: 1.5rem; }

/* List view — horizontal cards, 1 per row (desktop) */
.grid.view-list {
  grid-template-columns: 1fr;
  gap: 0.6rem;
}
.grid.view-list .card {
  flex-direction: row;
  align-items: stretch;
}
.grid.view-list .card-img,
.grid.view-list .card-img-placeholder {
  width: 180px;
  height: 140px;
  flex-shrink: 0;
}
.grid.view-list .card-body {
  padding: 0.75rem 1rem;
  gap: 0.3rem;
}
.grid.view-list .card-price { font-size: 1.1rem; }
.grid.view-list .card-features { padding-top: 0.3rem; }
.grid.view-list .card-source-badge { top: 0.4rem; left: 0.4rem; }
.grid.view-list .card-op-badge { top: 0.4rem; right: auto; left: 9rem; }

/* ========================================================================= */
/* 07 — Card component                                                        */
/*       (.card, .card-img, .card-body, .card-price, .card-address,           */
/*        .card-features, .card-cta, badges)                                  */
/* ========================================================================= */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  position: relative;
}

.card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: var(--bg);
}

.card-img-placeholder {
  width: 100%;
  height: 180px;
  background: linear-gradient(135deg, #e0e7ff 0%, #f0f0f5 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 2rem;
}

.card-source-badge {
  position: absolute;
  top: 0.6rem;
  left: 0.6rem;
  max-width: calc(100% - 1.2rem); /* leaves 0.6rem margin on both sides of the card */
  background: rgba(26, 26, 46, 0.85);
  color: #fff;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  backdrop-filter: blur(4px);
  /* Long source labels (e.g. "Inmobiliaria Lamelas y Chaumont") must not
     overflow the card or the image in list-view. Truncate with ellipsis. */
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  box-sizing: border-box;
}

/* In list-view the image is 180px wide; badge must not extend past it. */
.grid.view-list .card-source-badge {
  max-width: calc(180px - 0.8rem);
}

/* Freshness badge — sits just below the source badge in the image overlay.
   `.is-new` is the green "🆕 NUEVO" pill; `.is-recent` is the neutral
   "Hace N días" pill. Uses the same blur treatment as the source badge so
   both layers read consistently over any cover photo. */
.card-fresh-badge {
  position: absolute;
  top: 2rem;               /* stacks under .card-source-badge (top: 0.6rem + badge height) */
  left: 0.6rem;
  padding: 0.18rem 0.5rem;
  border-radius: 4px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  backdrop-filter: blur(4px);
  max-width: calc(100% - 1.2rem);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  z-index: 1;
}

.card-fresh-badge.is-new {
  background: var(--green);
  color: #fff;
}

.card-fresh-badge.is-recent {
  background: rgba(26, 26, 46, 0.6);
  color: #fff;
  font-weight: 500;
}

/* List-view: image is only 180px wide — keep the freshness badge under the
   source badge and never wider than the image strip. */
.grid.view-list .card-fresh-badge {
  top: 1.7rem;
  left: 0.4rem;
  max-width: calc(180px - 0.8rem);
}

/* Favorite star button — floats top-right of the image, same blur treatment as
   the source badge. Gold fill when active. Smooth color transition on toggle. */
.card-fav-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(26, 26, 46, 0.55);
  color: #fff;
  border: none;
  border-radius: 999px;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  backdrop-filter: blur(4px);
  transition: color 0.2s, background 0.15s, transform 0.15s;
  z-index: 2;
  padding: 0;
}

.card-fav-btn:hover { transform: translateY(-1px); background: rgba(26, 26, 46, 0.75); }
.card-fav-btn.active { color: #fbbf24; }

/* When the op-badge is visible (currentOp === 'all'), shift the star left so
   they don't overlap. Op-badge is ~4.5rem wide with padding. */
.card .card-op-badge ~ .card-fav-btn {
  right: calc(0.6rem + 4.5rem);
}

/* List-view: image is only 180px wide — keep the star compact. */
.grid.view-list .card-fav-btn {
  width: 26px;
  height: 26px;
  font-size: 0.9rem;
  top: 0.35rem;
  right: 0.35rem;
}

.card-op-badge {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  background: var(--accent);
  color: #fff;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card-body {
  padding: 1rem 1.2rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
}

.card-price {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--green);
  white-space: nowrap;
}

.card-price.usd { color: var(--blue); }

/* Price-change badge — sits inline next to .card-price.
   Sourced from historial.json; the JS short-circuits when there's no
   second observation, so the badge only appears on listings whose price
   actually moved. Two flavours: drop (green-ish) and rise (red-ish). */
.card-price-change {
  display: inline-block;
  margin-left: 0.45rem;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  vertical-align: middle;
  white-space: nowrap;
}

.card-price-change.is-drop {
  color: #15803d;
  background: #dcfce7;
}

.card-price-change.is-rise {
  color: #b91c1c;
  background: #fee2e2;
}

.card-expenses {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.card-address {
  font-size: 0.95rem;
  font-weight: 500;
}

.card-city {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.card-features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
  padding-top: 0.5rem;
}

.badge {
  background: #eef2ff;
  color: var(--accent);
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.card-cta {
  padding-top: 0.5rem;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 500;
}

.no-results {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* ========================================================================= */
/* 08 — Responsive overrides (media queries grouped at bottom)                */
/* ========================================================================= */

@media (max-width: 640px) {
  header, .op-tabs, .filters, .results-bar, .grid, footer {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  .grid { grid-template-columns: 1fr; }
  .grid.view-grid-small { grid-template-columns: repeat(2, 1fr); gap: 0.5rem; }
  .op-tabs { padding-top: 0.5rem; }

  .search-bar { flex-direction: column; align-items: stretch; padding-left: 1rem; padding-right: 1rem; }
  .search-bar input[type="search"] { width: 100%; }

  .more-filters { padding-left: 1rem; padding-right: 1rem; }

  .view-switch .vs-label { display: none; }

  .grid.view-list .card { flex-direction: column; }
  .grid.view-list .card-img,
  .grid.view-list .card-img-placeholder { width: 100%; height: 160px; }
  .grid.view-list .card-op-badge { left: auto; right: 0.6rem; }
}