/* =========================================================
   Tally & Square — home improvement calculators
   Design tokens
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@500;700;800&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  /* Base palette */
  --paper: #F6F3EC;
  --surface: #FFFFFF;
  --surface-tick: #FBF9F4;
  --ink: #3D3A32;
  --ink-soft: #837C68;
  --line: #E4DECC;
  --rule: #D6CEB4;

  /* Primary accent — tape-measure amber, used sparingly for actions/emphasis */
  --amber: #EDAE4F;
  --amber-ink: #3D3A32;

  /* Per-tool material accents */
  --paint: #8E9C5F;      /* paint-swatch olive */
  --paint-soft: #F1F3E7;
  --flooring: #AC8258;   /* wood-stain brown */
  --flooring-soft: #F6EEE4;
  --drywall: #869199;    /* joint-compound grey-blue */
  --drywall-soft: #ECF0F2;
  --roofing: #6B7B8C;    /* slate / shingle blue-grey */
  --roofing-soft: #E8ECF0;
  --tile: #5B8A9A;       /* glazed tile blue */
  --tile-soft: #E6F0F3;
  --grass: #5F8F4E;      /* lawn green */
  --grass-soft: #E8F0E4;
  --metal: #6A7A8A;      /* galvanized / metal grey-blue */
  --metal-soft: #E8ECF0;

  --tool-accent: var(--amber);
  --tool-soft: var(--surface-tick);

  /* Subtle blueprint grid lines for page background */
  --grid-fine: rgba(61, 58, 50, 0.06);
  --grid-coarse: rgba(61, 58, 50, 0.09);

  --radius: 3px;
  --max-width: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  /* Colorful tools pattern background */
  background-color: var(--paper);
  background-image:
    linear-gradient(rgba(246, 243, 236, 0.72), rgba(246, 243, 236, 0.72)),
    url("tools-bg.jpg");
  background-size: auto, 420px auto;
  background-position: 0 0, 0 0;
  background-repeat: repeat;
}

h1, h2, h3, .display {
  font-family: 'Archivo', system-ui, sans-serif;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.08;
  margin: 0 0 0.5em;
  color: var(--ink);
}

h1 { font-size: clamp(2.1rem, 4.2vw, 3.4rem); }
h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); }
h3 { font-size: 1.15rem; font-weight: 700; }

p { margin: 0 0 1em; color: var(--ink-soft); max-width: 62ch; }

a { color: var(--ink); }
a.link { color: var(--tool-accent); text-decoration: none; border-bottom: 1px solid currentColor; }
a.link:hover { opacity: 0.75; }

.mono, input, output, .result-value, .num {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
}

img, svg { max-width: 100%; display: block; }

/* ---------- Layout shells ---------- */

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.rule {
  border: none;
  border-top: 1px solid var(--line);
  margin: 0;
}

/* ---------- Header ---------- */

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--ink);
  flex-shrink: 0;
}

.brand-logo {
  height: 44px;
  width: auto;
  display: block;
}

.brand-mark {
  font-family: 'Archivo', sans-serif;
  font-weight: 800;
  font-size: 1.15rem;
}

.brand-sub {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  color: var(--ink-soft);
}

@media (max-width: 480px) {
  .brand-logo {
    height: 36px;
  }
}

.site-nav {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  text-decoration: none;
  font-size: 0.93rem;
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
  padding-bottom: 4px;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--tool-accent);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* ---------- Ruler motif (used once, sparingly) ---------- */

.ruler {
  height: 18px;
  width: 100%;
  border-bottom: 1px solid var(--line);
  background-image: repeating-linear-gradient(
    to right,
    var(--rule) 0,
    var(--rule) 1px,
    transparent 1px,
    transparent 20px
  );
  background-position: bottom left;
  background-size: 100% 10px;
  background-repeat: repeat-x;
}

/* ---------- Hero ---------- */

.hero {
  padding: 72px 0 48px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-tools {
  display: flex;
  gap: 14px;
  margin-bottom: 18px;
  color: var(--ink-soft);
}

.hero-tools svg {
  width: 22px;
  height: 22px;
  opacity: 0.7;
}

.hero-eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin-bottom: 14px;
}

.hero p.lede {
  font-size: 1.1rem;
  max-width: 46ch;
}

.hero-figure {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 20px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'IBM Plex Sans', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--ink);
  text-decoration: none;
  cursor: pointer;
  background: var(--ink);
  color: var(--paper);
}

.btn:hover { background: #3a352c; }

.btn-outline {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn-outline:hover { border-color: var(--ink); }

/* ---------- Tool index (homepage list of calculators) ---------- */

.tool-index {
  padding: 8px 0 64px;
}

.tool-row {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  text-decoration: none;
  color: var(--ink);
}

.tool-index .tool-row:last-child { border-bottom: 1px solid var(--line); }

.tool-swatch {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tool-swatch svg {
  width: 22px;
  height: 22px;
  display: block;
}

.tool-row h3 { margin: 0 0 4px; }
.tool-row p { margin: 0; font-size: 0.92rem; }

.tool-go {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.82rem;
  color: var(--ink-soft);
  white-space: nowrap;
}

.tool-row:hover .tool-go { color: var(--ink); }

/* ---------- Section headings ---------- */

.section {
  padding: 56px 0;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
}

.section-head .count {
  font-family: 'IBM Plex Mono', monospace;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

/* ---------- Calculator page ---------- */

.tool-hero {
  padding: 40px 0 8px;
}

.tool-tag {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.78rem;
  color: var(--tool-accent);
  border: 1px solid var(--tool-accent);
  padding: 3px 9px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.calc-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
  padding: 24px 0 48px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 28px;
}

.panel h2 { font-size: 1.1rem; margin-bottom: 20px; }

.field {
  margin-bottom: 18px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

input[type="number"], select {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font-size: 0.98rem;
}

input[type="number"]:focus, select:focus {
  outline: 2px solid var(--tool-accent);
  outline-offset: 1px;
  border-color: var(--tool-accent);
}

.field-hint {
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-top: 5px;
}

.result-panel {
  position: sticky;
  top: 92px;
  background: var(--tool-soft);
  border: 1px solid var(--line);
  padding: 28px;
}

.result-label {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.result-value {
  font-size: clamp(2.2rem, 5vw, 3rem);
  font-weight: 600;
  color: var(--ink);
  line-height: 1;
  margin-bottom: 4px;
}

.result-unit {
  font-size: 1rem;
  color: var(--ink-soft);
}

.result-breakdown {
  margin-top: 22px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.breakdown-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.88rem;
  padding: 6px 0;
  color: var(--ink-soft);
}

.breakdown-row span:last-child {
  color: var(--ink);
  font-family: 'IBM Plex Mono', monospace;
}

.result-note {
  margin-top: 18px;
  font-size: 0.85rem;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--tool-accent);
}

/* ---------- Explainer / FAQ ---------- */

.explainer {
  padding: 8px 0 48px;
  max-width: 68ch;
}

.faq-item {
  border-top: 1px solid var(--line);
  padding: 20px 0;
}

.faq-item:last-child { border-bottom: 1px solid var(--line); }

.faq-item h3 { margin-bottom: 8px; }

/* ---------- Affiliate / product callout ---------- */

.product-strip {
  padding: 48px 0;
  background: var(--surface-tick);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.product-card {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 18px;
}

.product-card .cat {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  color: var(--tool-accent);
  margin-bottom: 8px;
}

.product-card h3 { font-size: 1rem; margin-bottom: 6px; }
.product-card p { font-size: 0.85rem; margin-bottom: 12px; }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 40px 0;
  margin-top: 32px;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links a {
  color: var(--ink-soft);
  text-decoration: none;
}

.footer-links a:hover { color: var(--ink); }

/* ---------- Simple content pages (privacy/terms) ---------- */

.doc {
  padding: 56px 0 80px;
  max-width: 68ch;
}

.doc h2 { margin-top: 2em; }

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-figure { order: -1; }
  .calc-layout { grid-template-columns: 1fr; }
  .result-panel { position: static; }
  .product-grid { grid-template-columns: 1fr; }
  .site-nav { display: none; }
  .nav-toggle { display: flex; }
  .site-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 16px 24px 24px;
    gap: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

:focus-visible {
  outline: 2px solid var(--tool-accent);
  outline-offset: 2px;
}

/* =========================================================
   Dark mode
   ========================================================= */

[data-theme="dark"] {
  --paper: #1A1916;
  --surface: #24221E;
  --surface-tick: #2C2A25;
  --ink: #F0EDE6;
  --ink-soft: #A8A295;
  --line: #3A3730;
  --rule: #4A463C;

  --amber: #EDAE4F;
  --amber-ink: #1A1916;

  --paint: #A3B574;
  --paint-soft: #2A2E22;
  --flooring: #C49A6C;
  --flooring-soft: #2E261F;
  --drywall: #9AA7B0;
  --drywall-soft: #23272A;
  --concrete: #A89F90;
  --concrete-soft: #2A2824;
  --mulch: #B08A68;
  --mulch-soft: #2A231C;
  --wallpaper: #B88A9A;
  --wallpaper-soft: #2A2226;
  --insulation: #C4A84A;
  --insulation-soft: #2A2618;
  --fence: #8FA08F;
  --fence-soft: #222622;
  --roofing: #8A9AAB;
  --roofing-soft: #22262A;
  --tile: #7AADBC;
  --tile-soft: #1E282C;
  --grass: #7AAD68;
  --grass-soft: #1E2A1A;
  --metal: #8A9AAA;
  --metal-soft: #1E242A;

  --tool-accent: var(--amber);
  --tool-soft: var(--surface-tick);

  --grid-fine: rgba(240, 237, 230, 0.05);
  --grid-coarse: rgba(240, 237, 230, 0.08);

  color-scheme: dark;
}

[data-theme="dark"] body {
  background-color: var(--paper);
  color: var(--ink);
  background-image:
    linear-gradient(rgba(26, 25, 22, 0.88), rgba(26, 25, 22, 0.88)),
    url("tools-bg.jpg");
  background-size: auto, 420px auto;
  background-position: 0 0, 0 0;
  background-repeat: repeat;
}

[data-theme="dark"] .btn {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

[data-theme="dark"] .btn:hover {
  background: #E8E4DC;
}

[data-theme="dark"] input[type="number"],
[data-theme="dark"] select {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--line);
}

[data-theme="dark"] .hero-figure {
  background: var(--surface);
  border-color: var(--line);
}

[data-theme="dark"] .hero-figure text {
  fill: var(--ink);
}

[data-theme="dark"] .hero-figure rect {
  stroke: var(--line);
}

/* Theme toggle button */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--ink);
  flex-shrink: 0;
  margin-left: 8px;
}

.theme-toggle:hover {
  border-color: var(--ink-soft);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* Header layout adjustment so toggle sits nicely */
.site-header .wrap {
  gap: 12px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}


/* ---------- Calculator dropdown picker ---------- */

.calc-picker {
  margin-top: 8px;
  margin-bottom: 32px;
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 24px;
  max-width: 520px;
}

.calc-picker label {
  display: block;
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.calc-picker-row {
  display: flex;
  gap: 12px;
  align-items: stretch;
}

.calc-picker select {
  flex: 1;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font-size: 1rem;
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  min-height: 48px;
}

.calc-picker select:focus {
  outline: 2px solid var(--amber);
  outline-offset: 1px;
  border-color: var(--amber);
}

.calc-go-btn {
  flex-shrink: 0;
  min-width: 88px;
  justify-content: center;
  border: none;
  cursor: pointer;
}

.calc-picker-hint {
  margin: 12px 0 0;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

@media (max-width: 480px) {
  .calc-picker-row {
    flex-direction: column;
  }
  .calc-go-btn {
    width: 100%;
  }
}


/* ---------- Back to Homepage ---------- */

.back-home {
  padding-top: 16px;
  padding-bottom: 0;
}

.back-home-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

.back-home-link:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}