/* kafinance.xyz — car loan calculator
   Identity: gunmetal slate + traffic orange + dove grey + off-white
   Typography: system Helvetica/Inter, black headlines, mixed case
   Layout: owner's-manual spec-sheet, numbered sections, bordered tiles */

:root {
  --slate: #37474f;
  --slate-dark: #1f2a30;
  --slate-soft: #607d8b;
  --orange: #ff6f00;
  --orange-dark: #c43e00;
  --orange-soft: #ffd180;
  --dove: #eceff1;
  --dove-deep: #cfd8dc;
  --cream: #f8f8f6;
  --line: #d0d4d6;
  --text: #1a1a1a;
  --grey: #6a7378;
  --shadow: rgba(55, 71, 79, 0.12);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Inter", "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--cream);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.4rem;
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.4rem;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .8rem;
  text-decoration: none;
  color: var(--slate);
}

.brand-mark {
  width: 46px;
  height: 46px;
  display: inline-grid;
  place-items: center;
  background: var(--slate);
  border-radius: 10px;
  position: relative;
}

.brand-mark .wheel {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--dove);
  position: relative;
}
.brand-mark .wheel::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 8px; height: 8px;
  background: var(--orange);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}
.brand-mark .wheel::after {
  content: '';
  position: absolute;
  inset: 6px;
  background:
    linear-gradient(0deg, transparent 45%, var(--dove) 45%, var(--dove) 55%, transparent 55%),
    linear-gradient(60deg, transparent 45%, var(--dove) 45%, var(--dove) 55%, transparent 55%),
    linear-gradient(120deg, transparent 45%, var(--dove) 45%, var(--dove) 55%, transparent 55%);
  border-radius: 50%;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.brand-name {
  font-weight: 900;
  font-size: 1.22rem;
  color: var(--slate);
  letter-spacing: -0.02em;
}

.brand-tagline {
  font-size: .72rem;
  color: var(--orange-dark);
  margin-top: 3px;
  letter-spacing: .3px;
  font-weight: 600;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.3rem;
  align-items: center;
}

.nav a {
  text-decoration: none;
  color: var(--slate);
  font-size: .9rem;
  font-weight: 600;
  transition: color .15s ease;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
}

.nav a:hover { color: var(--orange-dark); border-bottom-color: var(--orange); }

.nav-toggle { display: none; }

@media (max-width: 920px) {
  .nav { display: none; }
  .nav.open {
    display: flex;
    position: absolute;
    top: 78px; left: 0; right: 0;
    background: var(--cream);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    padding: 1rem 1.4rem;
    gap: .8rem;
    box-shadow: 0 4px 16px var(--shadow);
  }
  .nav-toggle {
    display: flex; flex-direction: column; gap: 4px;
    background: var(--slate); border: none;
    border-radius: 8px;
    padding: 9px 11px; cursor: pointer;
  }
  .nav-toggle span { display: block; width: 22px; height: 2px; background: var(--cream); border-radius: 2px; }
}

/* ---------- hero ---------- */
.hero {
  background: var(--slate);
  padding: 3.5rem 0 3rem;
  color: var(--cream);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--orange) 0%, var(--orange) 35%, var(--cream) 35%, var(--cream) 100%);
}

.hero-inner { position: relative; z-index: 1; }

.eyebrow {
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  color: var(--slate);
  background: var(--orange);
  padding: .35rem 1rem;
  border-radius: 4px;
  letter-spacing: .5px;
  margin-bottom: 1.2rem;
  text-transform: uppercase;
}

.hero h1 {
  font-weight: 900;
  font-size: clamp(2rem, 4.4vw, 3.4rem);
  line-height: 1.08;
  margin: 0 0 1rem;
  color: var(--cream);
  letter-spacing: -0.02em;
  max-width: 800px;
}

.hero .lead {
  max-width: 720px;
  font-size: 1.05rem;
  color: var(--dove);
}

/* ---------- main content ---------- */
main { padding: 2.6rem 0 4rem; }

.content > section { margin-bottom: 2.4rem; }

h2 {
  font-weight: 900;
  font-size: 1.55rem;
  color: var(--slate);
  margin: 0 0 .9rem;
  letter-spacing: -0.01em;
  display: flex;
  align-items: baseline;
  gap: .8rem;
}

h2 .sec {
  font-family: "SF Mono", "JetBrains Mono", Consolas, monospace;
  font-size: .95rem;
  font-weight: 700;
  color: var(--orange-dark);
  letter-spacing: 0;
  flex-shrink: 0;
}

h3 {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--slate);
  margin: 1.4rem 0 .5rem;
  letter-spacing: -0.005em;
}

p { margin: 0 0 1rem; }

a { color: var(--orange-dark); text-decoration: none; border-bottom: 1.5px solid var(--orange-soft); transition: border-color .15s ease; font-weight: 600; }
a:hover { border-bottom-color: var(--orange-dark); }

ul, ol { padding-left: 1.4rem; margin: 0 0 1rem; }
li { margin-bottom: .35rem; }

/* ---------- calculator card ---------- */
.tool-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 2.2rem 2.2rem;
  margin: 2rem 0;
  box-shadow: 0 4px 20px var(--shadow), 0 1px 3px rgba(0,0,0,0.04);
}

.tool-card h2 {
  margin-bottom: .3rem;
}

.tool-subtitle {
  color: var(--grey);
  margin-bottom: 1.6rem;
  font-size: .96rem;
}

.mode-tabs {
  display: flex;
  background: var(--dove);
  padding: .3rem;
  border-radius: 8px;
  margin: 0 0 1.4rem;
  width: fit-content;
}

.mode-tab {
  padding: .55rem 1.4rem;
  font-family: inherit;
  font-size: .9rem;
  font-weight: 700;
  color: var(--slate-soft);
  background: transparent;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: all .15s ease;
}

.mode-tab.active {
  background: var(--slate);
  color: var(--cream);
}

.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem 1.4rem;
}

@media (max-width: 700px) { .tool-grid { grid-template-columns: 1fr; } }

.tool-grid label {
  display: flex;
  flex-direction: column;
  font-size: .8rem;
  font-weight: 700;
  color: var(--slate);
  letter-spacing: .2px;
  text-transform: uppercase;
}

.tool-grid input, .tool-grid select {
  margin-top: .4rem;
  padding: .75rem .9rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  background: var(--cream);
  border: 1.5px solid var(--line);
  border-radius: 6px;
  outline: none;
  text-transform: none;
  letter-spacing: 0;
}

.tool-grid input:focus, .tool-grid select:focus {
  border-color: var(--orange);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(255, 111, 0, 0.12);
}

.btn {
  display: inline-block;
  padding: .85rem 2rem;
  font-family: inherit;
  font-size: .95rem;
  font-weight: 700;
  color: var(--cream);
  background: var(--orange);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  letter-spacing: .3px;
  transition: background .15s ease;
}

.btn:hover { background: var(--orange-dark); }

.tool-actions {
  display: flex;
  justify-content: center;
  gap: .8rem;
  margin-top: 1.6rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
}

.tool-actions .btn-secondary {
  background: var(--cream);
  color: var(--slate);
  border: 1.5px solid var(--slate);
}

.tool-actions .btn-secondary:hover { background: var(--dove); color: var(--slate); }

/* ---------- result panel ---------- */
.result {
  margin-top: 1.8rem;
  padding: 1.6rem 1.4rem;
  background: var(--slate);
  color: var(--cream);
  border-radius: 10px;
  box-shadow: 0 4px 16px var(--shadow);
}

.result h3 {
  margin: 0 0 1.1rem;
  text-align: center;
  color: var(--orange-soft);
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.result-tile {
  text-align: left;
  padding: 1rem 1.1rem;
  background: var(--slate-dark);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 6px;
  border-left: 3px solid var(--orange);
}

.result-tile-label {
  display: block;
  font-size: .7rem;
  color: var(--dove-deep);
  margin-bottom: .35rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  font-weight: 600;
}

.result-tile-value {
  display: block;
  font-size: 1.55rem;
  font-weight: 900;
  color: var(--cream);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.result-tile-value.accent { color: var(--orange-soft); }

.breakdown {
  margin-top: 1.2rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.breakdown-row {
  display: flex;
  justify-content: space-between;
  padding: .35rem 0;
  font-size: .92rem;
  border-bottom: 1px dashed rgba(255,255,255,0.08);
}
.breakdown-row:last-child { border-bottom: 0; font-weight: 700; padding-top: .6rem; margin-top: .3rem; border-top: 2px solid var(--orange); }

.breakdown-label { color: var(--dove); }
.breakdown-value { color: var(--cream); font-variant-numeric: tabular-nums; font-weight: 600; }

/* ---------- E-E-A-T author card ---------- */
.author-card {
  background: var(--dove);
  border: 1px solid var(--line);
  border-left: 4px solid var(--orange);
  border-radius: 0 8px 8px 0;
  padding: 1.2rem 1.5rem;
  margin: 2rem 0;
  color: var(--slate);
  font-size: .95rem;
}

.author-card strong { color: var(--slate-dark); font-weight: 700; }

/* ---------- about/contact form card ---------- */
.form-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.8rem 2rem;
  margin: 1rem 0 2.5rem;
  box-shadow: 0 2px 12px var(--shadow);
}

.form-card label {
  display: block;
  margin-bottom: 1rem;
  font-size: .82rem;
  font-weight: 700;
  color: var(--slate);
  text-transform: uppercase;
  letter-spacing: .3px;
}

.form-card input, .form-card select, .form-card textarea {
  width: 100%;
  padding: .75rem .9rem;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text);
  background: var(--cream);
  border: 1.5px solid var(--line);
  border-radius: 6px;
  margin-top: .35rem;
  text-transform: none;
  letter-spacing: 0;
  font-weight: 400;
}

.form-card input:focus, .form-card select:focus, .form-card textarea:focus {
  border-color: var(--orange);
  outline: none;
  background: #fff;
}

/* ---------- tables ---------- */
.cookie-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: .92rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.cookie-table th, .cookie-table td {
  text-align: left;
  padding: .6rem .8rem;
  border-bottom: 1px solid var(--line);
}

.cookie-table th {
  background: var(--slate);
  color: var(--cream);
  font-weight: 700;
  font-size: .82rem;
  letter-spacing: .3px;
  text-transform: uppercase;
}

.cookie-table tr:nth-child(even) td { background: var(--dove); }

.cookie-table code {
  font-family: "SF Mono", "JetBrains Mono", Consolas, monospace;
  background: var(--cream);
  padding: 1px 6px;
  border: 1px solid var(--line);
  border-radius: 3px;
  font-size: .88rem;
}

/* ---------- footer ---------- */
.site-footer {
  background: var(--slate-dark);
  color: var(--dove);
  padding: 2.6rem 0 1.4rem;
  margin-top: 3rem;
  border-top: 4px solid var(--orange);
}

.site-footer .brand-name { color: var(--cream); }
.site-footer .brand-tagline { color: var(--orange-soft); }

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 1.6rem;
}

@media (max-width: 700px) { .footer-grid { grid-template-columns: 1fr; } }

.site-footer h4 {
  font-weight: 700;
  color: var(--orange-soft);
  margin: 0 0 .7rem;
  font-size: .9rem;
  letter-spacing: .5px;
  text-transform: uppercase;
}

.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: .45rem; }
.site-footer a { color: var(--dove); text-decoration: none; font-size: .92rem; border-bottom: none; font-weight: 400; }
.site-footer a:hover { color: var(--orange-soft); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.2rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: .85rem;
  color: var(--slate-soft);
}

.footer-bottom small a { color: var(--orange-soft); border-bottom: none; }