/* ── Design tokens — "Industry" system: steel-blue on a light technical
   ground, wireframe cards with corner registration marks. ── */
:root {
  --color-bg: #f2f2f3;
  --color-surface: #e9e9ea;
  --color-text: #1d1f20;
  --color-accent: #5980a6;
  --color-divider: color-mix(in srgb, #1d1f20 16%, transparent);

  --color-neutral-500: #98989b;

  --color-accent-100: #eef6ff;
  --color-accent-300: #b5d9fd;
  --color-accent-400: #94bce3;
  --color-accent-600: #597ea3;
  --color-accent-700: #416180;
  --color-accent-800: #2c455d;
  --color-accent-900: #1d2d3d;

  /* Warning — the only non-blue accent, reserved for a corpus running dry.
     The 300 tint is the readable one on the dark hero card. */
  --color-warning: #a8551b;
  --color-warning-300: #f4b57a;

  --font-heading: "Barlow Condensed", system-ui, sans-serif;
  --font-heading-weight: 600;
  --font-body: "Barlow", system-ui, sans-serif;

  --space-1: 3.4px;
  --space-2: 6.8px;
  --space-3: 10.2px;
  --space-4: 13.6px;
  --space-6: 20.4px;
  --space-8: 27.2px;

  --radius-md: 4px;

  --shadow-sm: 0 1px 2px color-mix(in srgb, #2b2b2d 14%, transparent);
  --shadow-md: 0 3px 10px color-mix(in srgb, #2b2b2d 16%, transparent);
}

* , *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-heading-weight);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0 0 var(--space-2);
}

p { margin: 0 0 var(--space-3); }
a { color: var(--color-accent); text-underline-offset: 3px; }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
::selection { background: color-mix(in srgb, var(--color-accent) 30%, transparent); }

.text-muted { color: color-mix(in srgb, var(--color-text) 55%, transparent); }

/* ── blueprint frame ── */
.blueprint {
  position: relative;
  border: 1px solid var(--color-divider);
}
.blueprint > .corner {
  position: absolute; width: 11px; height: 11px;
  color: color-mix(in srgb, var(--color-text) 55%, transparent);
}
.blueprint > .corner::before, .blueprint > .corner::after {
  content: ""; position: absolute; background: currentColor;
}
.blueprint > .corner::before { left: 5px; top: 0; width: 1px; height: 100%; }
.blueprint > .corner::after  { top: 5px; left: 0; width: 100%; height: 1px; }
.blueprint > .corner.tl { top: -6px; left: -6px; }
.blueprint > .corner.tr { top: -6px; right: -6px; }
.blueprint > .corner.bl { bottom: -6px; left: -6px; }
.blueprint > .corner.br { bottom: -6px; right: -6px; }

/* ── buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  cursor: pointer; text-decoration: none;
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 14px; line-height: 1.2; color: var(--color-text);
  background: transparent; border: 1px solid var(--color-divider);
  padding: var(--space-2) calc(var(--space-3) * 1.2);
  border-radius: 0;
}
.btn svg { display: block; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--color-accent); color: var(--color-bg); border-color: var(--color-accent); }
.btn-primary:hover { background: var(--color-accent-600); }
.btn-primary:active { background: var(--color-accent-700); }
.btn-secondary:hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); }
.btn-secondary:active { background: color-mix(in srgb, var(--color-text) 14%, transparent); }
.btn-ghost { color: var(--color-accent); border-color: transparent; padding-inline: var(--space-1); }
.btn-ghost:hover { background: color-mix(in srgb, var(--color-accent) 10%, transparent); }
.btn-icon { width: 36px; height: 36px; padding: 0; }

.seg { display: inline-flex; overflow: hidden; border: 1px solid var(--color-divider); }
.seg-btn {
  flex: 1; min-width: 0; padding-inline: 6px; min-height: 36px;
  background: transparent; border: 1px solid var(--color-divider); border-left: none;
  font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 13px;
  cursor: pointer; color: var(--color-text);
}
.seg-btn:first-child { border-left: 1px solid var(--color-divider); }
.seg-btn.active { background: var(--color-accent); color: var(--color-bg); border-color: var(--color-accent); }
.seg-btn:not(.active):hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); }
.seg-full { display: flex; width: 100%; }

/* ── forms ── */
.field { display: flex; flex-direction: column; gap: 4px; }
.field > label, .group-label {
  font-size: 12px; color: color-mix(in srgb, var(--color-text) 70%, transparent);
}
.input {
  width: 100%; min-height: 36px; padding: 6px 10px; font: inherit;
  font-size: 14px; color: var(--color-text); caret-color: var(--color-accent);
  background: var(--color-surface);
  border: 1px solid var(--color-divider); border-radius: 0;
}
.input:hover { border-color: color-mix(in srgb, var(--color-text) 45%, transparent); }
.input:focus-visible { border-color: var(--color-accent); outline-offset: 0; }
.input-prefixed {
  display: flex; align-items: stretch; border: 1px solid var(--color-divider); background: var(--color-surface);
}
.input-prefixed span {
  display: flex; align-items: center; padding: 0 11px; font-size: 14px;
  border-right: 1px solid var(--color-divider);
  color: color-mix(in srgb, var(--color-text) 60%, transparent);
}
.input-prefixed .input { border: 0; background: transparent; }
select.input {
  appearance: none; cursor: pointer; padding-right: 24px;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6' fill='none' stroke='%231d1f20' stroke-width='1.5'><path d='M1 1l4 4 4-4'/></svg>");
  background-repeat: no-repeat; background-position: right 8px center;
}

/* toggle switch */
.toggle-btn { display: inline-flex; align-items: center; gap: 8px; border: 0; background: transparent; padding: 0; cursor: pointer; margin-left: auto; }
.toggle-btn .toggle-label { font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: color-mix(in srgb, var(--color-text) 55%, transparent); }
.toggle-track { display: block; width: 34px; height: 18px; flex: none; border: 1px solid var(--color-divider); background: var(--color-surface); position: relative; }
.toggle-track.on { border-color: var(--color-accent); background: var(--color-accent); }
.toggle-knob { position: absolute; top: 2px; left: 2px; width: 12px; height: 12px; background: var(--color-neutral-500); transition: left .12s ease; }
.toggle-track.on .toggle-knob { left: 18px; background: var(--color-bg); }
.fade-body { transition: opacity .12s ease; }
.fade-body.off { opacity: .4; pointer-events: none; }

/* ── tags ── */
.tag { display: inline-flex; align-items: center; font-size: 11px; letter-spacing: 0.02em; padding: 3px 10px; }
.tag-accent { background: var(--color-accent-100); color: var(--color-accent-800); }
.tag-outline { border: 1px solid var(--color-accent); color: var(--color-accent); }
.tag-neutral { background: color-mix(in srgb, var(--color-text) 8%, transparent); color: color-mix(in srgb, var(--color-text) 60%, transparent); }
.tag-warn { background: color-mix(in srgb, var(--color-warning) 14%, transparent); color: var(--color-warning); }

/* ── tables ── */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th {
  text-align: left; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: color-mix(in srgb, var(--color-text) 60%, transparent);
  padding: var(--space-2); border-bottom: 1px solid var(--color-divider);
  position: sticky; top: 0; background: var(--color-bg);
}
.table td { padding: var(--space-2); border-bottom: 1px solid color-mix(in srgb, var(--color-text) 8%, transparent); }
.table tbody tr:hover { background: color-mix(in srgb, var(--color-text) 4%, transparent); }

/* ══════════════════════════════ page layout ══════════════════════════════ */

.nav {
  display: flex; align-items: center; gap: var(--space-4);
  max-width: 1240px; margin: 0 auto; padding: 16px 24px;
  border-bottom: 1px solid var(--color-divider);
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 18px; letter-spacing: .02em; margin-right: auto;
}
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav a { color: inherit; text-decoration: none; font-size: 14px; }
.nav a:hover, .nav a[aria-current='page'] { color: var(--color-accent); }

.calc-tabs {
  border-bottom: 1px solid var(--color-divider);
  background: color-mix(in srgb, var(--color-accent) 4%, transparent);
}
.calc-tabs-inner {
  max-width: 1240px; margin: 0 auto; padding: 0 24px;
  display: flex; overflow-x: auto;
}
.calc-tab {
  padding: 14px 20px; font: 600 13px/1 var(--font-heading); letter-spacing: .08em;
  text-transform: uppercase; white-space: nowrap;
  color: color-mix(in srgb, var(--color-text) 65%, transparent);
  border: none; border-right: 1px solid var(--color-divider);
  background: transparent; cursor: pointer;
  text-decoration: none; display: inline-block;
}
.calc-tab:hover:not([aria-current='page']) { color: var(--color-accent); background: color-mix(in srgb, var(--color-accent) 8%, transparent); }
.calc-tab[aria-current='page'] { color: var(--color-bg); background: var(--color-accent-900); }

.page-container { max-width: 1240px; margin: 0 auto; padding: 40px 24px 64px; }

.calc-intro { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 34px; }
.calc-intro-text { max-width: 620px; }
.calc-kicker {
  font: 400 10px/1 var(--font-body); letter-spacing: .16em; text-transform: uppercase;
  color: var(--color-bg); background: var(--color-accent-900); padding: 5px 8px; display: inline-block; margin-bottom: 12px;
}
.calc-intro h1 { margin: 0 0 8px; font-size: 38px; }
.calc-intro p { margin: 0; font-size: 14.5px; color: color-mix(in srgb, var(--color-text) 62%, transparent); }
.calc-tags { display: flex; gap: 8px; flex-wrap: wrap; }

.calc-layout { display: flex; flex-wrap: wrap; gap: 34px; align-items: flex-start; }
.calc-col-left { flex: 1 1 360px; min-width: 0; display: flex; flex-direction: column; gap: 26px; }
.calc-col-right { flex: 1 1 540px; min-width: 0; display: flex; flex-direction: column; gap: 26px; }
/* Without this a wide child — the monthly amortisation table — sizes the
   column to its own min-content and drags the whole page sideways instead of
   scrolling inside .table-scroll. */
.calc-col-left, .calc-col-right { max-width: 100%; }

.bp-card { padding: 20px 18px 18px; display: flex; flex-direction: column; gap: 16px; }
.bp-card-head { display: flex; align-items: baseline; gap: 8px; }
.bp-card-num {
  font: 600 10px/1 var(--font-heading); letter-spacing: .1em;
  background: var(--color-accent-900); color: var(--color-bg); padding: 4px 6px;
}
.bp-card-head h2 { margin: 0; letter-spacing: .06em; text-transform: uppercase; font-size: 13px; }

.field-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 14px; }
.note { margin: 0; font-size: 11.5px; line-height: 1.45; color: color-mix(in srgb, var(--color-text) 55%, transparent); }

.lump-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: flex-end; border-top: 1px solid var(--color-divider); padding-top: 10px; }
.lump-row .field { flex: 1 1 150px; min-width: 132px; gap: 4px; }
.lump-row .field label { font-size: 10px; letter-spacing: .09em; text-transform: uppercase; color: color-mix(in srgb, var(--color-text) 50%, transparent); }
.lump-row .seg { flex: 0 0 104px; }
.lump-row .year-field { flex: 0 0 74px; }

/* ── goal planner ── */
.goal-row { display: flex; flex-direction: column; gap: 9px; border-top: 1px solid var(--color-divider); padding-top: 11px; }
.goal-row-head { display: flex; align-items: center; gap: 8px; }
.goal-row-num { font: 600 10px/1 var(--font-heading); letter-spacing: .1em; background: var(--color-accent-900); color: var(--color-bg); padding: 4px 5px; flex: none; }
.goal-row-title { display: flex; flex: 1 1 auto; min-width: 0; gap: 6px; }
.goal-row-title .goal-preset { flex: 0 0 116px; }
.goal-row-title input { flex: 1 1 110px; min-width: 0; }
.goal-row-head .toggle-btn { margin-left: 0; flex: none; }
.goal-row-fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(118px, 1fr)); gap: 8px; align-items: end; }
.goal-row-fields .field label { font-size: 10px; letter-spacing: .09em; text-transform: uppercase; white-space: nowrap; color: color-mix(in srgb, var(--color-text) 50%, transparent); }
/* An excluded goal dims its inputs but keeps its own toggle live, so it can
   be switched back on. */
.goal-row.off .goal-row-title, .goal-row.off .goal-row-fields { opacity: .4; pointer-events: none; }

.goal-result { display: flex; flex-direction: column; gap: 7px; padding: 13px 0; border-top: 1px solid var(--color-divider); }
.goal-result:first-child { border-top: 0; padding-top: 2px; }
.goal-result-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.goal-swatch { width: 10px; height: 10px; flex: none; }
.goal-result-name { font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 16px; }
.goal-result-sip { margin-left: auto; font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 19px; white-space: nowrap; }
.goal-result-sip small { font-family: var(--font-body); font-size: 11px; margin-left: 3px; color: color-mix(in srgb, var(--color-text) 55%, transparent); }
.goal-progress { position: relative; height: 6px; background: var(--color-surface); border: 1px solid var(--color-divider); }
.goal-progress > span { position: absolute; top: 0; bottom: 0; left: 0; background: var(--color-accent); }
.goal-progress.full > span { background: var(--color-accent-700); }
.goal-result-meta { font-size: 11.5px; line-height: 1.45; color: color-mix(in srgb, var(--color-text) 55%, transparent); }

.chart-legend .legend-swatch.block { width: 10px; height: 10px; }

/* ── prepay vs SIP ── */
/* Hairline gaps rather than borders, so the two columns read as one table
   split down the middle. */
.compare-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1px;
  background: var(--color-divider); border: 1px solid var(--color-divider);
}
.compare-col { background: var(--color-bg); padding: 13px 14px; display: flex; flex-direction: column; gap: 9px; }
.compare-col-head {
  display: flex; align-items: center; gap: 7px; flex-wrap: wrap;
  font: 600 12px/1.2 var(--font-heading); letter-spacing: .07em; text-transform: uppercase;
}
.compare-swatch { width: 10px; height: 10px; flex: none; }
.compare-col-head .tag { margin-left: auto; }
.compare-stat { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.compare-stat span { font-size: 11.5px; color: color-mix(in srgb, var(--color-text) 55%, transparent); }
.compare-stat b { font-family: var(--font-heading); font-weight: 600; font-size: 17px; white-space: nowrap; }

.compare-sensitivity { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.compare-sensitivity-label { font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: color-mix(in srgb, var(--color-text) 55%, transparent); }
.compare-tags { display: flex; flex-wrap: wrap; gap: 6px; }

.tenure-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tenure-row .input { flex: 1 1 52px; min-width: 0; }
.tenure-row .seg { flex: 1 0 124px; }

.actions-row { display: flex; gap: 10px; align-items: center; }
.btn-calculate { flex: 1; min-height: 56px; font-size: 16px; letter-spacing: .1em; text-transform: uppercase; background: var(--color-accent-900); border-color: var(--color-accent-900); color: var(--color-bg); box-shadow: var(--shadow-md); }
.btn-calculate:hover { background: var(--color-accent-800); }
.btn-reset { min-height: 48px; padding-inline: 16px; }
.dirty-note { min-height: 16px; margin-top: -14px; font-size: 11.5px; color: var(--color-accent-700); }

.hero-card {
  padding: 24px 22px; display: flex; flex-direction: column; gap: 20px;
  background: var(--color-accent-900); color: var(--color-bg); border-color: var(--color-accent-700);
}
.hero-top { display: flex; flex-wrap: wrap; gap: 20px; align-items: flex-end; justify-content: space-between; }
.hero-label { font-size: 10px; letter-spacing: .12em; text-transform: uppercase; color: var(--color-accent-300); margin-bottom: 6px; }
.hero-value { font-family: var(--font-heading); font-weight: 600; font-size: 52px; line-height: 1; letter-spacing: -.02em; }
.hero-full { font-size: 12.5px; margin-top: 6px; color: rgba(242,242,243,.68); }
.donut-wrap { position: relative; width: 132px; height: 132px; flex: none; }
.donut-center { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; pointer-events: none; }
.donut-multiple { font: 600 21px/1 var(--font-heading); color: #f2f2f3; }
.donut-sub { font: 400 9px/1 var(--font-body); letter-spacing: .1em; color: rgba(242,242,243,.65); }

.hero-toggle-row { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; padding-top: 14px; margin-top: -2px; border-top: 1px solid rgba(242,242,243,.15); }
.hero-card .toggle-label { color: rgba(242,242,243,.75); }
.hero-card .toggle-track { border-color: rgba(242,242,243,.35); background: rgba(242,242,243,.1); }
.hero-card .toggle-track.on { border-color: var(--color-accent-300); background: var(--color-accent-300); }
.hero-card .toggle-knob { background: rgba(242,242,243,.65); }
.hero-card .toggle-track.on .toggle-knob { background: var(--color-accent-900); }
.hero-inflation-rate { display: flex; align-items: center; gap: 8px; font-size: 12px; color: rgba(242,242,243,.75); }
.hero-inflation-rate input {
  width: 60px; padding: 4px 6px; font: inherit; font-size: 13px;
  background: transparent; border: 1px solid rgba(242,242,243,.35); color: #f2f2f3; border-radius: 0;
}
.hero-inflation-rate input:focus-visible { outline: 2px solid var(--color-accent-300); outline-offset: 0; }

.hero-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(128px, 1fr)); gap: 1px; background: rgba(242,242,243,.3); border: 1px solid rgba(242,242,243,.3); }
.hero-stat { background: var(--color-accent-900); padding: 12px 13px; }
.hero-stat-label { display: flex; align-items: center; gap: 6px; font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: rgba(242,242,243,.7); }
.hero-stat-dot { width: 9px; height: 9px; flex: none; }
.hero-stat-value { font-family: var(--font-heading); font-weight: 600; font-size: 21px; margin-top: 5px; }
.hero-card .hero-value.warn, .hero-card .hero-stat-value.warn { color: var(--color-warning-300); }

.chart-card { padding: 20px 18px 16px; display: flex; flex-direction: column; gap: 14px; }
.chart-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.chart-legend { display: flex; gap: 14px; font-size: 10.5px; letter-spacing: .06em; text-transform: uppercase; color: color-mix(in srgb, var(--color-text) 55%, transparent); }
.chart-legend span { display: flex; align-items: center; gap: 5px; }
.legend-swatch { width: 14px; height: 2px; display: block; }
.chart-ticks { display: flex; justify-content: space-between; font-size: 10.5px; color: color-mix(in srgb, var(--color-text) 50%, transparent); }

.table-card { padding: 20px 18px 8px; }
.table-card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.table-scroll { max-height: 290px; overflow: auto; }

.site-footer { border-top: 1px solid var(--color-divider); padding: 24px; text-align: center; }
.site-footer p { margin: 0; font-size: 11px; color: color-mix(in srgb, var(--color-text) 48%, transparent); }

@media (max-width: 720px) {
  .calc-layout { flex-direction: column; }
  .nav { flex-wrap: wrap; }
  .nav-links { gap: 16px; }
}

@media (max-width: 560px) {
  /* Side by side stops being readable once each column is narrower than its
     own numbers, so the two strategies stack instead. */
  .compare-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-stats { grid-template-columns: 1fr; }
  /* Narrow enough that the preset and the goal name cannot share a line with
     the toggle — they take one of their own below it instead of being
     squeezed to a few characters. */
  .goal-row-head { flex-wrap: wrap; }
  .goal-row-head .toggle-btn { margin-left: auto; }
  .goal-row-title { flex: 1 1 100%; order: 1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important; animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important; scroll-behavior: auto !important;
  }
}

/* ── landing page ── */
.home-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 26px;
}
.home-card {
  color: inherit; text-decoration: none; gap: 12px;
  transition: border-color .15s, background .15s;
}
.home-card:hover { background: color-mix(in srgb, var(--color-accent) 5%, transparent); }
.home-card:hover .bp-card-head h2 { color: var(--color-accent); }