/* === Casas Geminadas — sistema de diseño (mobile-first, sin build) === */
:root {
  --bg: #f1f5f9;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --primary: #0f766e;
  --primary-700: #115e59;
  --primary-50: #ccfbf1;
  --accent: #b45309;
  --danger: #b91c1c;
  --ok: #15803d;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 8px 24px rgba(15, 23, 42, .06);
  --maxw: 760px;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { line-height: 1.2; margin: 0 0 .4em; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.2rem; }
p { margin: 0 0 .8em; }
a { color: var(--primary-700); }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.center { text-align: center; }

/* Layout */
.site-header {
  display: flex; align-items: center; gap: .6rem;
  padding: .85rem 1.1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 20;
}
.brand { font-weight: 700; text-decoration: none; color: var(--text); }
.brand-tag {
  font-size: .72rem; text-transform: uppercase; letter-spacing: .06em;
  color: var(--primary-700); background: var(--primary-50);
  padding: .12rem .5rem; border-radius: 999px;
}
.site-header .spacer { margin-left: auto; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 1.1rem; }
.site-footer {
  max-width: var(--maxw); margin: 1rem auto 3rem; padding: 0 1.1rem;
  color: var(--muted); font-size: .8rem; text-align: center;
}

/* Hero */
.hero { padding: 1.4rem 0 .6rem; }
.hero h1 { font-size: 1.8rem; }
.hero p { color: var(--muted); font-size: 1.02rem; }

/* Cards */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 1.1rem; margin-bottom: 1rem;
}
.card h2 { margin-top: 0; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font: inherit; font-weight: 600; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  padding: .7rem 1.1rem; border-radius: var(--radius-sm);
  text-decoration: none; transition: filter .12s, background .12s;
}
.btn:hover { background: var(--surface-2); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { filter: brightness(1.06); background: var(--primary); }
.btn-ghost { background: transparent; }
.btn-block { width: 100%; }
.btn-wa { background: #25D366; border-color: #25D366; color: #06351b; }
.btn-wa:hover { filter: brightness(1.04); background: #25D366; }
.btn-lg { padding: .9rem 1.3rem; font-size: 1.05rem; }

/* Forms */
.field { margin-bottom: 1rem; }
.field > label { display: block; font-weight: 600; margin-bottom: .4rem; }
.field .hint { color: var(--muted); font-size: .82rem; margin: .15rem 0 0; }
select, textarea, input[type="text"], input[type="tel"], input[type="email"],
input[type="password"], input[type="number"] {
  width: 100%; font: inherit; color: var(--text);
  padding: .6rem .7rem; border: 1px solid var(--border);
  border-radius: var(--radius-sm); background: var(--surface);
}
textarea { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: .82rem; min-height: 130px; }
select:focus, input:focus, textarea:focus { outline: 2px solid var(--primary-50); border-color: var(--primary); }
.form-row { display: flex; gap: .5rem; flex-wrap: wrap; align-items: flex-end; }
.form-row > * { flex: 1; min-width: 130px; }

/* Option chips (selección por botones) */
.options { display: grid; gap: .55rem; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }
.opt {
  border: 1.5px solid var(--border); background: var(--surface);
  border-radius: var(--radius-sm); padding: .65rem .6rem; cursor: pointer;
  text-align: center; font-weight: 600; transition: border-color .12s, background .12s;
}
.opt:hover { border-color: var(--primary); }
.opt.selected { border-color: var(--primary); background: var(--primary-50); color: var(--primary-700); }
.opt .sub { display: block; font-weight: 400; font-size: .78rem; color: var(--muted); }

/* Checkboxes */
.check-grid { display: grid; gap: .55rem; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.check {
  display: flex; align-items: center; gap: .55rem; cursor: pointer;
  border: 1.5px solid var(--border); border-radius: var(--radius-sm); padding: .6rem .7rem;
}
.check.selected { border-color: var(--primary); background: var(--primary-50); }
.check input { width: 1.1rem; height: 1.1rem; accent-color: var(--primary); }

/* Wizard */
.progress { display: flex; gap: .35rem; margin: .2rem 0 1rem; }
.progress .seg { height: 6px; flex: 1; border-radius: 999px; background: var(--border); }
.progress .seg.done { background: var(--primary); }
.step-meta { display: flex; justify-content: space-between; color: var(--muted); font-size: .82rem; margin-bottom: .3rem; }
.step { display: none; }
.step.active { display: block; animation: fade .18s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.wizard-nav { display: flex; gap: .6rem; margin-top: .4rem; }
.wizard-nav .btn { flex: 1; }

/* Summary list */
.summary { list-style: none; padding: 0; margin: 0; }
.summary li { display: flex; justify-content: space-between; gap: 1rem; padding: .45rem 0; border-bottom: 1px solid var(--border); }
.summary li:last-child { border-bottom: 0; }
.summary .k { color: var(--muted); }
.summary .v { font-weight: 600; text-align: right; }

/* Area metrics */
.metrics-row { display: grid; gap: .6rem; grid-template-columns: repeat(3, 1fr); }
.metric { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: .7rem; text-align: center; }
.metric .n { font-size: 1.35rem; font-weight: 700; }
.metric .l { font-size: .72rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.bar { height: 8px; background: var(--border); border-radius: 999px; overflow: hidden; margin-top: .4rem; }
.bar > span { display: block; height: 100%; background: var(--primary); }

/* Result images */
.gallery { display: grid; gap: 1rem; grid-template-columns: 1fr; }
.shot { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.shot img { display: block; width: 100%; height: auto; background: var(--surface-2); }
.shot .cap { padding: .6rem .8rem; font-weight: 600; }
.shot .cap small { display: block; font-weight: 400; color: var(--muted); }

/* Loading */
.loading { text-align: center; padding: 3rem 1rem; }
.spinner {
  width: 46px; height: 46px; border-radius: 50%; margin: 0 auto 1rem;
  border: 4px solid var(--primary-50); border-top-color: var(--primary);
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Badges / alerts */
.badge { display: inline-block; padding: .14rem .55rem; border-radius: 999px; font-size: .74rem; font-weight: 600; }
.badge.gen { background: var(--primary-50); color: var(--primary-700); }
.badge.err { background: #fee2e2; color: var(--danger); }
.badge.wa { background: #dcfce7; color: var(--ok); }
.alert { padding: .8rem 1rem; border-radius: var(--radius-sm); margin-bottom: 1rem; }
.alert.err { background: #fee2e2; color: var(--danger); border: 1px solid #fecaca; }
.alert.info { background: var(--primary-50); color: var(--primary-700); }

/* Privacy box */
.privacy { background: var(--surface-2); border: 1px dashed var(--border); border-radius: var(--radius-sm); padding: .7rem .85rem; font-size: .85rem; color: var(--muted); }
.consent { display: flex; gap: .55rem; align-items: flex-start; margin-top: .6rem; }
.consent input { margin-top: .25rem; accent-color: var(--primary); }

/* Admin */
.admin-shell { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.admin-nav { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1rem; }
.admin-nav a { padding: .45rem .8rem; border-radius: 999px; text-decoration: none; border: 1px solid var(--border); background: var(--surface); color: var(--text); font-size: .9rem; }
.admin-nav a.active { background: var(--primary); border-color: var(--primary); color: #fff; }
.table-wrap { overflow-x: auto; }
table.data { width: 100%; border-collapse: collapse; font-size: .88rem; }
table.data th, table.data td { text-align: left; padding: .55rem .6rem; border-bottom: 1px solid var(--border); white-space: nowrap; }
table.data th { color: var(--muted); font-weight: 600; }
.kpi-row { display: grid; gap: .7rem; grid-template-columns: repeat(2, 1fr); margin-bottom: 1rem; }
.kpi { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; box-shadow: var(--shadow); }
.kpi .n { font-size: 1.7rem; font-weight: 700; }
.kpi .l { color: var(--muted); font-size: .82rem; }

/* Utilities */
.mt { margin-top: 1rem; }
.mt-half { margin-top: .6rem; }
.subhead { font-size: .95rem; margin: 1rem 0 .4rem; }
[hidden] { display: none !important; }

@media (min-width: 640px) {
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .gallery .shot.span2 { grid-column: 1 / -1; }
  .kpi-row { grid-template-columns: repeat(4, 1fr); }
}