/* ————————————————————————————————————————————————
   NEXT STEP · a home-buying ledger
   Aesthetic: banker's ledger — warm paper, green ink,
   terracotta stamps, hairline rules, tabular figures.
   ———————————————————————————————————————————————— */

:root {
  --paper: #f2ecdd;
  --paper-raised: #faf6ea;
  --paper-dim: #e9e1cd;
  --ink: #1f2a1f;
  --ink-soft: #4a5546;
  --ink-faint: #8a907e;
  --rule: #cfc4a6;
  --rule-strong: #a99e7e;
  --terracotta: #b5471f;
  --terracotta-dim: #d8b09e;
  --green: #2e5339;
  --gold: #97772c;
  --azure: #3a5a8c;
  --plum: #71334d;
  --slate: #54707d;
  --shadow: rgba(31, 42, 31, 0.16);
  --font-display: "Fraunces", Georgia, serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.5;
  min-height: 100vh;
  /* faint red margin line, like a ruled ledger page */
  background-image: linear-gradient(
    to right,
    transparent 56px,
    rgba(181, 71, 31, 0.18) 56px,
    rgba(181, 71, 31, 0.18) 57px,
    transparent 57px
  );
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

code { font-family: var(--font-mono); font-size: 0.85em; }

/* ——— Masthead ——— */

.masthead { padding: 2.2rem 4.5rem 0; }

.masthead-rule {
  border-top: 1px solid var(--ink);
  margin-bottom: 2px;
}
.masthead-rule.double {
  border-top: 3px double var(--ink);
  margin-top: 2px;
}

.masthead-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding: 1.1rem 0 0.9rem;
  gap: 2rem;
  flex-wrap: wrap;
}

.masthead-kicker {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--terracotta);
  display: block;
  margin-bottom: 0.2rem;
}

.masthead-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-style: italic;
  font-size: clamp(2.8rem, 6vw, 4.6rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
  font-variation-settings: "opsz" 144;
}

.masthead-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.35rem;
  padding-bottom: 0.4rem;
}

.masthead-meta {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
}

/* ——— Nav ——— */

.topnav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.1rem 4.5rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.topnav-tabs { display: flex; gap: 1.6rem; }

.tab {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 0.4rem 0.1rem;
  border-bottom: 3px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.tab:hover { color: var(--ink); }
.tab.active { color: var(--ink); border-bottom-color: var(--terracotta); }

/* ——— Buttons ——— */

.btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: transform 0.12s, box-shadow 0.12s, background 0.12s, color 0.12s;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn:active { transform: translate(1px, 1px); }

.btn-primary {
  background: var(--ink);
  color: var(--paper);
  box-shadow: 3px 3px 0 var(--shadow);
}
.btn-primary:hover { background: var(--terracotta); border-color: var(--terracotta); }

.btn-danger:hover { background: var(--terracotta); border-color: var(--terracotta); }

.btn-small { padding: 0.35rem 0.7rem; font-size: 0.62rem; }

/* ——— Auth ——— */

.topnav-right { display: flex; align-items: center; gap: 0.9rem; flex-wrap: wrap; }
#auth-slot { display: flex; align-items: center; gap: 0.6rem; }
.account-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  border: 1px solid var(--rule-strong);
  background: var(--paper-raised);
  padding: 0.3rem 0.7rem;
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.account-chip img { width: 18px; height: 18px; border-radius: 50%; }

/* ——— Layout ——— */

#app {
  padding: 1rem 4.5rem 4rem;
  max-width: 1500px;
}

.colophon a { color: var(--ink-soft); }
.colophon a:hover { color: var(--terracotta); }

.colophon {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.2rem 4.5rem 2.5rem;
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
}

/* ——— Animations ——— */

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

.rise { animation: rise 0.5s cubic-bezier(0.2, 0.7, 0.3, 1) both; }
.rise:nth-child(2) { animation-delay: 0.06s; }
.rise:nth-child(3) { animation-delay: 0.12s; }
.rise:nth-child(4) { animation-delay: 0.18s; }
.rise:nth-child(5) { animation-delay: 0.24s; }
.rise:nth-child(6) { animation-delay: 0.3s; }

/* ——— Scenario cards ——— */

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 380px), 1fr)); gap: 1.4rem; }

.card {
  position: relative;
  background: var(--paper-raised);
  border: 1px solid var(--ink);
  box-shadow: 5px 5px 0 var(--shadow);
  padding: 1.4rem 1.5rem 1.2rem;
  transition: transform 0.15s, box-shadow 0.15s;
}
.card:hover { transform: translate(-2px, -2px); box-shadow: 8px 8px 0 var(--shadow); }

.card-no {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--ink-faint);
}

.card-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.55rem;
  line-height: 1.1;
  margin: 0.25rem 0 0.9rem;
  cursor: pointer;
}
.card-name:hover { color: var(--terracotta); }

.stamp {
  position: absolute;
  top: 1.1rem;
  right: 1.2rem;
  transform: rotate(4deg);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  padding: 0.3rem 0.55rem;
  border: 2px solid currentColor;
  border-radius: 3px;
  opacity: 0.85;
}
.stamp-fixed { color: var(--green); }
.stamp-arm { color: var(--terracotta); }

.card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.7rem 1rem;
  border-top: 1px solid var(--rule);
  padding-top: 0.85rem;
  margin-bottom: 1rem;
}

.fig-label {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  display: block;
  margin-bottom: 0.1rem;
}

.fig-value {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.fig-value.big { font-size: 1.15rem; font-weight: 600; }
.fig-value.accent { color: var(--terracotta); }

.card-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* ——— Empty state ——— */

.empty {
  text-align: center;
  padding: 5rem 1rem;
  border: 1px dashed var(--rule-strong);
}
.empty-stamp {
  display: inline-block;
  transform: rotate(-3deg);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--terracotta);
  border: 2px solid var(--terracotta);
  border-radius: 4px;
  padding: 0.5rem 1rem;
  margin-bottom: 1.2rem;
  opacity: 0.75;
}
.empty p { font-style: italic; color: var(--ink-soft); margin-bottom: 1.5rem; }

/* ——— Section headers ——— */

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin: 1.2rem 0 1.4rem;
}
.section-title {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 600;
  font-size: 2rem;
}
.section-sub {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ——— Editor form ——— */

.editor { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(300px, 1fr); gap: 2.5rem; align-items: start; }

.form-block { margin-bottom: 1.8rem; }

.form-block-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--terracotta);
  border-bottom: 1px solid var(--rule-strong);
  padding-bottom: 0.4rem;
  margin-bottom: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.form-block-title .hint {
  color: var(--ink-faint);
  letter-spacing: 0.05em;
  text-transform: none;
  font-size: 0.65rem;
}

.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1rem 1.4rem; margin-bottom: 1rem; }

.field label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  display: block;
  margin-bottom: 0.25rem;
}

.field input[type="text"],
.field input[type="number"],
.field select {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-variant-numeric: tabular-nums;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--rule-strong);
  padding: 0.35rem 0.1rem;
  color: var(--ink);
  border-radius: 0;
  transition: border-color 0.15s;
}
.field input:focus, .field select:focus {
  outline: none;
  border-bottom: 2px solid var(--terracotta);
}
.field select { cursor: pointer; appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%), linear-gradient(135deg, var(--ink) 50%, transparent 50%); background-position: calc(100% - 12px) 55%, calc(100% - 7px) 55%; background-size: 5px 5px; background-repeat: no-repeat; }

.field .note {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--ink-faint);
  margin-top: 0.3rem;
  display: block;
}

.check-field {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  cursor: pointer;
  padding-top: 1.1rem;
}
.check-field input { width: 16px; height: 16px; accent-color: var(--terracotta); cursor: pointer; }

.arm-fields {
  border-left: 3px solid var(--terracotta-dim);
  padding-left: 1.1rem;
  margin: 0.4rem 0 1rem;
}

.editor-actions { display: flex; gap: 0.8rem; margin-top: 1.5rem; }

/* ——— Live preview slip ——— */

.slip {
  position: sticky;
  top: 1.2rem;
  background: var(--paper-raised);
  border: 1px solid var(--ink);
  box-shadow: 6px 6px 0 var(--shadow);
  padding: 1.5rem 1.6rem;
}
.slip::before {
  content: "PREVIEW · COMPUTED LIVE";
  display: block;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.26em;
  color: var(--terracotta);
  margin-bottom: 1rem;
}

.slip-hero { border-bottom: 3px double var(--ink); padding-bottom: 1rem; margin-bottom: 1rem; }
.slip-hero .fig-label { font-size: 0.62rem; }
.slip-hero .slip-amount {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.6rem;
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
}
.slip-hero .slip-amount small { font-size: 1.1rem; font-weight: 500; color: var(--ink-soft); }

.slip-rows { display: flex; flex-direction: column; gap: 0.45rem; }
.slip-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}
.slip-row .k { color: var(--ink-soft); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; }
.slip-row .v { font-variant-numeric: tabular-nums; font-weight: 500; }
.slip-row.divide { border-top: 1px solid var(--rule); padding-top: 0.55rem; margin-top: 0.25rem; }
.slip-row .v.accent { color: var(--terracotta); }
.slip-row .v.good { color: var(--green); }

/* ——— Detail view ——— */

.statband {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 1px;
  background: var(--ink);
  border: 1px solid var(--ink);
  box-shadow: 6px 6px 0 var(--shadow);
  margin-bottom: 2rem;
}
.statband > div { background: var(--paper-raised); padding: 1.1rem 1.2rem; }
.statband .fig-value { font-size: 1.45rem; font-weight: 600; }
.statband .fig-value small { font-size: 0.8rem; font-weight: 400; color: var(--ink-soft); }

.callout {
  border-left: 4px solid var(--green);
  background: rgba(46, 83, 57, 0.07);
  padding: 0.9rem 1.2rem;
  margin-bottom: 2rem;
  font-style: italic;
}
.callout strong { font-style: normal; font-family: var(--font-mono); font-size: 0.9em; }
.callout.warn { border-left-color: var(--terracotta); background: rgba(181, 71, 31, 0.07); }

.detail-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; margin-bottom: 2.5rem; }
@media (max-width: 1000px) { .detail-cols { grid-template-columns: 1fr; } }

.kv-table { width: 100%; border-collapse: collapse; }
.kv-table td {
  padding: 0.5rem 0.2rem;
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}
.kv-table td:first-child { color: var(--ink-soft); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; }
.kv-table td:last-child { text-align: right; font-variant-numeric: tabular-nums; font-weight: 500; }

/* ——— Charts ——— */

.chart-wrap {
  background: var(--paper-raised);
  border: 1px solid var(--rule-strong);
  padding: 1.2rem 1.2rem 0.8rem;
  margin-bottom: 2.5rem;
}
.chart-title {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.8rem;
}
.chart-wrap svg { width: 100%; height: auto; display: block; }
.chart-legend { display: flex; gap: 1.4rem; flex-wrap: wrap; padding: 0.7rem 0 0.3rem; }
.chart-legend span {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}
.chart-legend i { width: 18px; height: 3px; display: inline-block; }

/* ——— Amortization tables ——— */

.toggle-group { display: inline-flex; border: 1px solid var(--ink); }
.toggle-group button {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0.45rem 1rem;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--ink-soft);
}
.toggle-group button.active { background: var(--ink); color: var(--paper); }

.amort-wrap { overflow-x: auto; }

.amort {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}
.amort th {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-align: right;
  padding: 0.5rem 0.7rem;
  border-bottom: 2px solid var(--ink);
}
.amort th:first-child { text-align: left; }
.amort td {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
  padding: 0.42rem 0.7rem;
  border-bottom: 1px solid var(--rule);
}
.amort td:first-child { text-align: left; color: var(--ink-soft); }
.amort tr:hover td { background: rgba(151, 119, 44, 0.08); }
.amort .year-sep td {
  border-bottom: 2px solid var(--rule-strong);
  font-weight: 600;
  background: var(--paper-dim);
  color: var(--ink);
}
.amort .extra-col { color: var(--green); }
.amort .rate-col { color: var(--azure); }

/* ——— Compare view ——— */

.compare-picker { display: flex; gap: 0.7rem; flex-wrap: wrap; margin-bottom: 1.6rem; }
.pick {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--rule-strong);
  background: transparent;
  cursor: pointer;
  color: var(--ink-soft);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.pick i { width: 10px; height: 10px; border-radius: 50%; border: 1px solid currentColor; display: inline-block; }
.pick.on { border-color: var(--ink); color: var(--ink); background: var(--paper-raised); box-shadow: 3px 3px 0 var(--shadow); }
.pick.on i { background: var(--pick-color, var(--ink)); border-color: var(--pick-color, var(--ink)); }

.compare-table-wrap { overflow-x: auto; margin-bottom: 2.5rem; }
.compare-table { border-collapse: collapse; min-width: 100%; }
.compare-table th, .compare-table td {
  font-family: var(--font-mono);
  padding: 0.55rem 1rem;
  border-bottom: 1px solid var(--rule);
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.compare-table thead th {
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 2px solid var(--ink);
  vertical-align: bottom;
}
.compare-table thead th .swatch { width: 22px; height: 4px; display: block; margin: 0 0 6px auto; }
.compare-table td:first-child, .compare-table th:first-child {
  text-align: left;
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  position: sticky;
  left: 0;
  background: var(--paper);
}
.compare-table td { font-size: 0.8rem; }
.compare-table td.best {
  color: var(--green);
  font-weight: 600;
  position: relative;
}
.compare-table td.best::after {
  content: "●";
  font-size: 0.5rem;
  margin-left: 0.45rem;
  vertical-align: 2px;
}
.compare-table tr.group-row td {
  border-bottom: none;
  padding-top: 1.3rem;
  color: var(--terracotta);
  font-size: 0.62rem;
  letter-spacing: 0.24em;
}

.verdict {
  border: 3px double var(--ink);
  background: var(--paper-raised);
  padding: 1.3rem 1.6rem;
  margin-bottom: 2.5rem;
  box-shadow: 6px 6px 0 var(--shadow);
}
.verdict h3 {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--terracotta);
  margin-bottom: 0.7rem;
}
.verdict p { font-style: italic; font-size: 1.05rem; }
.verdict p strong { font-style: normal; }

/* ——— Toast ——— */

.toast {
  position: fixed;
  bottom: 1.6rem;
  right: 1.6rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  padding: 0.8rem 1.3rem;
  box-shadow: 5px 5px 0 var(--shadow);
  z-index: 1000;
  animation: rise 0.3s ease both;
}

/* ——— Responsive ——— */

@media (max-width: 900px) {
  body { background-image: none; }
  .masthead, .topnav, #app, .colophon { padding-left: 1.2rem; padding-right: 1.2rem; }
  .editor { grid-template-columns: 1fr; }
  .slip { position: static; }
}

@media (max-width: 600px) {
  /* 16px+ inputs stop iOS Safari from zooming the page on focus */
  .field input[type="text"],
  .field input[type="number"],
  .field select { font-size: 16px; }

  .masthead { padding-top: 1.4rem; }
  .masthead-inner { padding: 0.8rem 0 0.7rem; gap: 0.8rem; }
  /* cap flex items at the viewport — wrapping flex containers grow instead
     of shrinking, so long text lines (meta, hints, footer) stretch the page
     wider than the phone unless explicitly capped */
  .masthead-inner > *, .topnav > *, .section-head > *, .colophon > *,
  .masthead-left, .masthead-right { max-width: 100%; min-width: 0; }
  .masthead-right { align-items: flex-start; }
  .masthead-meta { font-size: 0.58rem; letter-spacing: 0.12em; }
  .topnav { padding-top: 0.8rem; padding-bottom: 0.8rem; }
  .topnav-tabs { gap: 1.1rem; }
  #app { padding-bottom: 2.5rem; }

  .statband { grid-template-columns: 1fr 1fr; }
  .statband .fig-value { font-size: 1.2rem; }
  .card-grid { gap: 0.6rem 0.7rem; }
  .slip-hero .slip-amount { font-size: 2.1rem; }
  .section-title { font-size: 1.6rem; }

  .btn { padding: 0.6rem 0.9rem; }
  .editor-actions { flex-wrap: wrap; }
  .toast { left: 1rem; right: 1rem; text-align: center; }
}