@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800;900&display=swap');

:root {
  --font-body: 'Poppins', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-heading: 'Outfit', 'Poppins', -apple-system, sans-serif;
  --brand: #1a1a1a;
  --brand-light: #3a3a3a;
  --accent: #f61a1a;
  --accent-dark: #c91414;
  --bg: #efeeeb;
  --card: #ffffff;
  --text: #2b2b2b;
  --muted: #7a7a7a;
  --border: #d9d8d4;
  --good: #1e7a3c;
  --good-bg: #e8f4ec;
  --shadow: 0 1px 3px rgba(0,0,0,.05), 0 4px 14px rgba(0,0,0,.04);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 300;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}
h1, h2, h3, .brand-text, .hero h1, thead th, .stat .stat-value {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: .3px;
}
.label-tag, .stat-label, header .brand-text small {
  font-family: var(--font-heading);
}
input, select, button, .btn {
  font-family: var(--font-body);
}
button, .btn { font-weight: 600; letter-spacing: .3px; }
label { font-weight: 400; }

/* HEADER */
header {
  background: var(--card);
  border-bottom: 3px solid var(--accent);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
header .brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: var(--brand);
}
header .brand img {
  height: 60px;
  width: auto;
}
header .brand-text {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .5px;
  line-height: 1.2;
}
header .brand-text small {
  display: block;
  font-size: .7rem;
  font-weight: 400;
  color: var(--muted);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-top: 2px;
}
header nav a {
  color: var(--brand);
  text-decoration: none;
  margin-left: 1.5rem;
  font-size: .9rem;
  font-weight: 500;
  padding-bottom: 3px;
  border-bottom: 2px solid transparent;
}
header nav a:hover, header nav a.active {
  border-bottom-color: var(--accent);
}

/* LAYOUT */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}
h1 {
  margin: 0 0 .25rem;
  font-size: 1.75rem;
  color: var(--brand);
}
.subtitle {
  color: var(--muted);
  margin-bottom: 1.5rem;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}
.card h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
  color: var(--brand);
  border-bottom: 2px solid var(--accent);
  padding-bottom: .5rem;
}

/* FORMS */
.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
label {
  display: block;
  font-size: .85rem;
  color: var(--muted);
  margin-bottom: .25rem;
  font-weight: 500;
}
input[type="text"], input[type="number"], input[type="email"], input[type="date"], select {
  width: 100%;
  padding: .55rem .7rem;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: .95rem;
  font-family: inherit;
  background: white;
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(246,26,26,.15);
}

/* SCENARIOS (seller sheet) */
.scenarios-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}
.scenario-input {
  background: var(--bg);
  padding: 1rem;
  border-radius: 6px;
  border: 1px solid var(--border);
}
.scenario-input h3 {
  margin: 0 0 .75rem;
  font-size: .9rem;
  color: var(--brand);
}

/* RESULTS */
.results-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  margin-bottom: 1.5rem;
}
.result-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-top: 4px solid var(--brand-light);
  border-radius: 8px;
  padding: 1.25rem;
  text-align: center;
  box-shadow: var(--shadow);
}
.result-card.best {
  border-top-color: var(--good);
  background: var(--good-bg);
}
.result-card .label-tag {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
  margin-bottom: .25rem;
}
.result-card .name {
  font-weight: 600;
  margin-bottom: .5rem;
  color: var(--brand);
}
.result-card .price {
  font-size: 1.1rem;
  color: var(--muted);
}
.result-card .net {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--brand);
  margin-top: .5rem;
}
.result-card.best .net { color: var(--good); }
.best-badge {
  display: inline-block;
  background: var(--good);
  color: white;
  font-size: .7rem;
  padding: .15rem .5rem;
  border-radius: 10px;
  margin-bottom: .5rem;
  letter-spacing: .5px;
}

/* TABLES */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}
th, td {
  padding: .55rem .6rem;
  text-align: right;
  border-bottom: 1px solid var(--border);
}
th:first-child, td:first-child { text-align: left; }
thead th {
  background: var(--brand);
  color: white;
  font-weight: 600;
  font-size: .85rem;
}
tbody tr.subtotal td { background: var(--bg); font-weight: 600; }
tbody tr.total td {
  background: var(--brand);
  color: white;
  font-size: 1rem;
  font-weight: 700;
}
.table-wrap { overflow-x: auto; }

/* BUTTONS */
.actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1rem; }
button, .btn {
  padding: .65rem 1.25rem;
  border: none;
  border-radius: 5px;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background .15s, transform .05s;
  text-decoration: none;
  display: inline-block;
}
button:active, .btn:active { transform: translateY(1px); }
.btn-primary { background: var(--brand); color: white; }
.btn-primary:hover { background: var(--brand-light); }
.btn-secondary { background: var(--accent); color: white; }
.btn-secondary:hover { background: var(--accent-dark); }
.btn-ghost {
  background: white;
  color: var(--brand);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--bg); }

/* OFFER ROWS */
.offer-row {
  display: grid;
  gap: .75rem;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr auto;
  align-items: end;
  padding: .75rem;
  background: var(--bg);
  border-radius: 6px;
  margin-bottom: .75rem;
}
.offer-row .remove-btn {
  background: transparent;
  color: var(--accent-dark);
  border: 1px solid var(--accent-dark);
  padding: .4rem .75rem;
  font-size: .8rem;
}
.offer-row .remove-btn:hover { background: var(--accent-dark); color: white; }
.offer-net {
  font-weight: 700;
  color: var(--brand);
  padding-top: .5rem;
}

/* LANDING TILES */
.hero {
  text-align: center;
  padding: 2rem 1rem 1rem;
}
.hero h1 { font-size: 2.25rem; margin-bottom: .5rem; }
.hero p { color: var(--muted); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }
.tiles {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-top: 2rem;
}
.tile {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.75rem;
  text-decoration: none;
  color: var(--text);
  box-shadow: var(--shadow);
  transition: transform .15s, border-color .15s, box-shadow .15s;
  display: block;
}
.tile:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 4px 8px rgba(0,0,0,.08), 0 10px 24px rgba(0,0,0,.06);
}
.tile h3 {
  margin: 0 0 .5rem;
  color: var(--brand);
  font-size: 1.2rem;
  border-bottom: 2px solid var(--accent);
  padding-bottom: .5rem;
  display: inline-block;
}
.tile p { margin: .5rem 0 0; color: var(--muted); font-size: .95rem; }

/* FOOTER */
footer {
  text-align: center;
  color: var(--muted);
  font-size: .8rem;
  padding: 2rem 1rem;
  border-top: 1px solid var(--border);
  margin-top: 2rem;
}
footer a { color: var(--accent-dark); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* DISCLAIMER */
.disclaimer {
  font-size: .8rem;
  color: var(--muted);
  font-style: italic;
  margin-top: 1rem;
  padding: .75rem 1rem;
  background: #fffbea;
  border-left: 3px solid var(--accent);
  border-radius: 4px;
}

/* AMORTIZATION TABLE */
.amort-summary {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  margin-bottom: 1rem;
}
.stat {
  text-align: center;
  padding: 1rem;
  background: var(--bg);
  border-radius: 6px;
  border: 1px solid var(--border);
}
.stat .stat-label {
  font-size: .75rem;
  text-transform: uppercase;
  color: var(--muted);
  letter-spacing: 1px;
}
.stat .stat-value {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--brand);
  margin-top: .25rem;
}
.stat.highlight .stat-value { color: var(--accent); }

/* RESPONSIVE */
@media (max-width: 700px) {
  .offer-row { grid-template-columns: 1fr 1fr; }
  header { padding: 1rem; }
  header nav a { margin-left: .75rem; }
  main { padding: 1.25rem .75rem; }
  .hero h1 { font-size: 1.75rem; }
  header .brand img { height: 48px; }
}

/* PRINT */
@media print {
  header nav, .actions, .no-print { display: none !important; }
  body { background: white; }
  .card { box-shadow: none; border-color: #ccc; page-break-inside: avoid; }
  header { background: white; border-bottom: 2px solid var(--brand); }
}