/* ═══════════════════════════════════════
   Utleiekalkulator — main.css
   ═══════════════════════════════════════ */

/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --white:  #ffffff;
  --off:    #fafafa;
  --line:   #e8e8e8;
  --line2:  #f0f0f0;
  --muted:  #999;
  --body:   #444;
  --ink:    #111;
  --blue:   #0066ff;
  --green:  #00a86b;
  --red:    #e03131;
  --gold:   #c87800;
  --radius: 4px;
  --max-w:  1160px;
  --topbar: 52px;
}

html { font-size: 15px; scroll-behavior: smooth; }

body {
  font-family: 'Geist', sans-serif;
  background: var(--white);
  color: var(--body);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

main { flex: 1; }

a { color: inherit; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

/* ── Skip link ── */
.skip-link {
  position: absolute; top: -999px; left: 1rem;
  background: var(--blue); color: var(--white);
  padding: 0.5rem 1rem; font-size: 0.8rem;
  z-index: 999;
}
.skip-link:focus { top: 0.5rem; }

/* ════════════════════════════
   TOPBAR
════════════════════════════ */
.topbar {
  position: sticky; top: 0; z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 0 var(--line);
}

.topbar-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  height: var(--topbar);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  font-family: 'Instrument Serif', serif;
  font-size: 1.15rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.brand em { font-style: italic; color: var(--blue); }

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius);
  transition: color 0.12s, background 0.12s;
  white-space: nowrap;
}
.nav-link:hover { color: var(--ink); background: var(--off); }
.nav-link.is-active { color: var(--blue); background: var(--off); }

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 36px; height: 36px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 6px;
}
.nav-toggle span {
  display: block; height: 1.5px;
  background: var(--ink); border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
  transform-origin: center;
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.nav-mobile {
  border-top: 1px solid var(--line);
  padding: 0.75rem 0;
  background: var(--white);
}
.nav-mobile-link {
  display: block;
  font-size: 0.9rem; font-weight: 500;
  color: var(--body);
  text-decoration: none;
  padding: 0.65rem 2rem;
  transition: background 0.1s;
}
.nav-mobile-link:hover,
.nav-mobile-link.is-active { background: var(--off); color: var(--blue); }

@media (max-width: 680px) {
  .nav-desktop { display: none; }
  .nav-toggle  { display: flex; }
}

/* ════════════════════════════
   PAGE TITLE
════════════════════════════ */
.page-title {
  padding: 3.5rem 2rem 3rem;
  max-width: var(--max-w);
  margin: 0 auto;
  border-bottom: 1px solid var(--line);
}
.page-title h1 {
  font-family: 'Instrument Serif', serif;
  font-size: clamp(2rem, 4vw, 3.2rem);
  color: var(--ink); font-weight: 400;
  letter-spacing: -0.025em; line-height: 1.05;
}
.page-title .lead {
  margin-top: 0.75rem;
  font-size: 0.9rem; color: var(--muted);
  max-width: 520px; line-height: 1.7;
}

/* ════════════════════════════
   HERO (home)
════════════════════════════ */
.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 5rem 2rem 4rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  border-bottom: 1px solid var(--line);
}
@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; padding: 3rem 2rem; gap: 2rem; }
}

.hero-eyebrow {
  font-size: 0.68rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.15em;
  color: var(--blue); margin-bottom: 1rem;
}
.hero h1 {
  font-family: 'Instrument Serif', serif;
  font-size: clamp(2.5rem, 5vw, 4rem);
  color: var(--ink); font-weight: 400;
  letter-spacing: -0.03em; line-height: 1.02;
}
.hero h1 em { font-style: italic; color: var(--blue); }
.hero-desc {
  margin-top: 1.25rem;
  font-size: 0.95rem; color: var(--muted);
  line-height: 1.75; max-width: 420px;
}
.hero-actions { margin-top: 2rem; display: flex; gap: 0.75rem; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.65rem 1.4rem;
  font-family: 'Geist', sans-serif;
  font-size: 0.85rem; font-weight: 500;
  text-decoration: none; border-radius: var(--radius);
  transition: all 0.15s; white-space: nowrap;
  border: 1px solid transparent;
}
.btn-primary { background: var(--ink); color: var(--white); border-color: var(--ink); }
.btn-primary:hover { background: #333; border-color: #333; }
.btn-ghost { background: transparent; color: var(--body); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); color: var(--ink); }

/* Hero stats */
.hero-stats {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1px;
  border: 1px solid var(--line); background: var(--line);
  border-radius: var(--radius); overflow: hidden;
}
.hero-stat {
  background: var(--white);
  padding: 1.5rem;
}
.hero-stat-val {
  font-family: 'Instrument Serif', serif;
  font-size: 2rem; color: var(--ink);
  letter-spacing: -0.02em; line-height: 1;
}
.hero-stat-val.blue { color: var(--blue); }
.hero-stat-label {
  font-size: 0.72rem; color: var(--muted);
  margin-top: 0.35rem; line-height: 1.4;
  text-transform: uppercase; letter-spacing: 0.04em;
}

/* ════════════════════════════
   FEATURES SECTION (home)
════════════════════════════ */
.features {
  max-width: var(--max-w); margin: 0 auto;
  padding: 4rem 2rem;
  border-bottom: 1px solid var(--line);
}
.section-label {
  font-size: 0.68rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.15em;
  color: var(--muted); margin-bottom: 2.5rem;
}
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem 3rem;
}
@media (max-width: 760px) { .features-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .features-grid { grid-template-columns: 1fr; } }

.feature-icon { font-size: 1.4rem; margin-bottom: 0.75rem; }
.feature-title { font-size: 0.9rem; font-weight: 600; color: var(--ink); margin-bottom: 0.4rem; }
.feature-desc { font-size: 0.82rem; color: var(--muted); line-height: 1.65; }

/* ════════════════════════════
   CALCULATOR LAYOUT
════════════════════════════ */
.calc-layout {
  max-width: var(--max-w); margin: 0 auto;
  display: grid; grid-template-columns: 1fr 320px;
  align-items: start;
}
@media (max-width: 860px) {
  .calc-layout { grid-template-columns: 1fr; }
  .sidebar { position: static !important; max-height: none !important; border-left: none !important; border-top: 1px solid var(--line); }
}

.inputs-col { border-right: 1px solid var(--line); }

/* Section */
.section { border-bottom: 1px solid var(--line); padding: 2rem; }
.section-title {
  font-size: 0.65rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--muted); margin-bottom: 1.75rem;
}

/* Fields grid */
.fields { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem 2.5rem; }
.fields.cols3 { grid-template-columns: 1fr 1fr 1fr; }
@media (max-width: 540px) {
  .fields, .fields.cols3 { grid-template-columns: 1fr 1fr; }
}
.field-span { grid-column: 1 / -1; }
.field { display: flex; flex-direction: column; gap: 0.5rem; }

.field-label {
  font-size: 0.7rem; font-weight: 500; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.07em;
  display: flex; align-items: center; gap: 0.3rem;
}
.req { color: var(--blue); }

/* Number input */
.num-input {
  display: flex; align-items: baseline;
  border-bottom: 1.5px solid var(--line);
  padding-bottom: 0.3rem; transition: border-color 0.15s;
}
.num-input:focus-within { border-color: var(--blue); }
.num-input input {
  border: none; outline: none; background: transparent;
  font-family: 'Geist Mono', monospace;
  font-size: 1.05rem; font-weight: 400; color: var(--ink);
  width: 100%; -moz-appearance: textfield; padding: 0;
}
.num-input input::placeholder { color: var(--line2); }
.num-input input::-webkit-inner-spin-button { -webkit-appearance: none; }
.num-unit { font-size: 0.7rem; color: var(--muted); white-space: nowrap; padding-left: 0.4rem; flex-shrink: 0; }

/* Text input */
.txt-input {
  border: none; outline: none; background: transparent;
  font-family: 'Geist', sans-serif; font-size: 0.95rem; color: var(--ink);
  width: 100%; border-bottom: 1.5px solid var(--line); padding-bottom: 0.3rem;
  transition: border-color 0.15s;
}
.txt-input:focus { border-color: var(--blue); }

/* Pills */
.pills { display: flex; gap: 0.35rem; flex-wrap: wrap; }
.pill {
  padding: 0.3rem 0.7rem; border: 1px solid var(--line); border-radius: 2px;
  font-size: 0.73rem; font-weight: 500; cursor: pointer;
  color: var(--muted); background: transparent;
  transition: all 0.12s; user-select: none;
}
.pill:hover { color: var(--ink); border-color: var(--body); }
.pill.on { background: var(--ink); color: var(--white); border-color: var(--ink); }

/* Slider */
.slider-wrap { display: flex; flex-direction: column; gap: 0.4rem; }
.slider-top { display: flex; justify-content: space-between; align-items: baseline; }
.slider-val { font-family: 'Geist Mono', monospace; font-size: 1rem; color: var(--blue); font-weight: 500; }

input[type="range"] {
  -webkit-appearance: none; width: 100%; height: 1px;
  background: linear-gradient(to right, var(--ink) var(--pct,0%), var(--line) var(--pct,0%));
  outline: none; cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 13px; height: 13px;
  border-radius: 50%; background: var(--ink); cursor: pointer;
  border: 2px solid var(--white); box-shadow: 0 0 0 1px var(--ink);
  transition: transform 0.1s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.3); }

.hint { font-size: 0.67rem; color: var(--muted); margin-top: 0.2rem; line-height: 1.4; }

/* Sidebar */
.sidebar {
  position: sticky; top: var(--topbar);
  max-height: calc(100vh - var(--topbar));
  overflow-y: auto; background: var(--white);
}
.sidebar::-webkit-scrollbar { width: 3px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--line); }

.kpi-hero { padding: 2rem; border-bottom: 1px solid var(--line); }
.kpi-hero-label {
  font-size: 0.62rem; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--muted); margin-bottom: 0.5rem;
}
.kpi-hero-val {
  font-family: 'Instrument Serif', serif; font-size: 2.8rem;
  line-height: 1; letter-spacing: -0.02em; transition: color 0.2s;
  color: var(--ink);
}
.kpi-hero-val.pos { color: var(--green); }
.kpi-hero-val.neg { color: var(--red); }
.kpi-hero-sub { font-size: 0.7rem; color: var(--muted); margin-top: 0.4rem; line-height: 1.55; }

.kpi-row {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 0.8rem 1.5rem; border-bottom: 1px solid var(--line2); gap: 0.75rem;
}
.kpi-row-label { font-size: 0.73rem; color: var(--muted); line-height: 1.3; flex: 1; }
.kpi-row-val {
  font-family: 'Geist Mono', monospace; font-size: 0.85rem;
  font-weight: 500; color: var(--ink); text-align: right; white-space: nowrap;
}
.kpi-row-val.pos { color: var(--green); }
.kpi-row-val.neg { color: var(--red); }
.kpi-row-val.accent { color: var(--gold); }

/* Tabs */
.tab-bar {
  display: flex; border-bottom: 1px solid var(--line); padding: 0 2rem; background: var(--off);
}
.tab {
  font-size: 0.72rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.07em;
  color: var(--muted); padding: 0.85rem 0; margin-right: 1.75rem;
  border-bottom: 2px solid transparent; cursor: pointer;
  transition: color 0.12s, border-color 0.12s; user-select: none;
}
.tab:hover { color: var(--ink); }
.tab.on { color: var(--ink); border-bottom-color: var(--ink); }
.tab-panel { display: none; }
.tab-panel.on { display: block; }

/* Tables */
.tbl { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
.tbl th {
  text-align: left; font-size: 0.63rem; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--muted); font-weight: 600;
  padding: 0.75rem 2rem; border-bottom: 1px solid var(--line);
  background: var(--off);
}
.tbl th.r { text-align: right; }
.tbl td { padding: 0.6rem 2rem; border-bottom: 1px solid var(--line2); color: var(--body); }
.tbl td.r { text-align: right; font-family: 'Geist Mono', monospace; font-size: 0.77rem; }
.tbl tr:last-child td { border-bottom: none; }
.tbl .bold { font-weight: 600; color: var(--ink); }
.tbl .pos { color: var(--green); font-weight: 600; }
.tbl .neg { color: var(--red); }
.tbl tr.total td { background: var(--off); border-top: 1px solid var(--line); }

/* ════════════════════════════
   PROSE (content pages)
════════════════════════════ */
.prose-wrap {
  max-width: var(--max-w); margin: 0 auto;
  padding: 3rem 2rem 5rem;
  display: grid; grid-template-columns: 1fr 280px; gap: 5rem; align-items: start;
}
@media (max-width: 860px) {
  .prose-wrap { grid-template-columns: 1fr; gap: 3rem; }
  .prose-toc { order: -1; }
}

.prose { max-width: 680px; }
.prose h2 {
  font-family: 'Instrument Serif', serif;
  font-size: 1.5rem; font-weight: 400; color: var(--ink);
  letter-spacing: -0.01em; margin: 2.5rem 0 0.75rem;
  padding-top: 2.5rem; border-top: 1px solid var(--line);
}
.prose h2:first-child { margin-top: 0; padding-top: 0; border-top: none; }
.prose h3 { font-size: 1rem; font-weight: 600; color: var(--ink); margin: 1.75rem 0 0.5rem; }
.prose p  { font-size: 0.9rem; line-height: 1.8; color: var(--body); margin-bottom: 1rem; }
.prose a  { color: var(--blue); text-decoration: underline; text-decoration-thickness: 1px; }
.prose ul, .prose ol { padding-left: 1.25rem; margin-bottom: 1rem; }
.prose li { font-size: 0.9rem; line-height: 1.8; color: var(--body); margin-bottom: 0.25rem; }
.prose strong { font-weight: 600; color: var(--ink); }
.prose blockquote {
  border-left: 2px solid var(--blue); margin: 1.5rem 0;
  padding: 0.75rem 1.25rem; background: var(--off);
}
.prose blockquote p { margin: 0; }

/* TOC */
.prose-toc {
  position: sticky; top: calc(var(--topbar) + 2rem);
}
.prose-toc-title {
  font-size: 0.65rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--muted); margin-bottom: 0.75rem;
}
.prose-toc a {
  display: block; font-size: 0.78rem; color: var(--muted);
  text-decoration: none; padding: 0.3rem 0;
  border-left: 2px solid var(--line); padding-left: 0.75rem;
  transition: color 0.12s, border-color 0.12s;
}
.prose-toc a:hover { color: var(--ink); border-color: var(--ink); }

/* ════════════════════════════
   FAQ
════════════════════════════ */
.faq-list { max-width: 680px; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-question {
  width: 100%; background: none; border: none; text-align: left;
  padding: 1.1rem 0; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  font-family: 'Geist', sans-serif; font-size: 0.9rem; font-weight: 600; color: var(--ink);
}
.faq-question:hover { color: var(--blue); }
.faq-icon { font-size: 1.2rem; color: var(--muted); flex-shrink: 0; transition: transform 0.2s; }
.faq-item.open .faq-icon { transform: rotate(45deg); color: var(--blue); }
.faq-answer {
  max-height: 0; overflow: hidden;
  transition: max-height 0.3s ease, padding 0.2s;
}
.faq-answer p {
  font-size: 0.87rem; line-height: 1.8; color: var(--body);
  padding-bottom: 1.25rem;
}
.faq-item.open .faq-answer { max-height: 600px; }

/* ════════════════════════════
   BLOG
════════════════════════════ */
.blog-grid {
  max-width: var(--max-w); margin: 0 auto;
  padding: 3rem 2rem 5rem;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px;
  background: var(--line);
  border: 1px solid var(--line);
}
@media (max-width: 860px) { .blog-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px) { .blog-grid { grid-template-columns: 1fr; } }

.blog-card {
  background: var(--white); padding: 1.75rem;
  text-decoration: none; display: block;
  transition: background 0.12s;
}
.blog-card:hover { background: var(--off); }

.blog-card-meta {
  font-size: 0.65rem; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.08em;
  margin-bottom: 0.6rem;
}
.blog-card-title {
  font-family: 'Instrument Serif', serif;
  font-size: 1.15rem; font-weight: 400; color: var(--ink);
  letter-spacing: -0.01em; line-height: 1.3; margin-bottom: 0.6rem;
}
.blog-card-desc { font-size: 0.8rem; color: var(--muted); line-height: 1.65; }
.blog-card-tags { margin-top: 1rem; display: flex; gap: 0.35rem; flex-wrap: wrap; }
.blog-tag {
  font-size: 0.65rem; color: var(--muted);
  border: 1px solid var(--line); padding: 0.2rem 0.5rem; border-radius: 2px;
}

/* ════════════════════════════
   404
════════════════════════════ */
.not-found {
  max-width: var(--max-w); margin: 0 auto;
  padding: 6rem 2rem; text-align: center;
}
.not-found-code {
  font-family: 'Instrument Serif', serif;
  font-size: 6rem; color: var(--line); letter-spacing: -0.04em; line-height: 1;
}
.not-found h1 {
  font-family: 'Instrument Serif', serif;
  font-size: 1.75rem; color: var(--ink); font-weight: 400; margin-top: 0.5rem;
}
.not-found p { font-size: 0.9rem; color: var(--muted); margin-top: 0.75rem; }
.not-found .btn { margin-top: 2rem; }

/* ════════════════════════════
   FOOTER
════════════════════════════ */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--off);
  margin-top: auto;
}
.footer-inner {
  max-width: var(--max-w); margin: 0 auto;
  padding: 3rem 2rem 2rem;
  display: grid; grid-template-columns: 1fr auto; gap: 3rem;
}
@media (max-width: 680px) { .footer-inner { grid-template-columns: 1fr; } }

.footer-brand .brand { display: inline-block; margin-bottom: 0.5rem; }
.footer-brand p { font-size: 0.78rem; color: var(--muted); max-width: 280px; line-height: 1.6; }

.footer-nav { display: flex; gap: 3rem; }
@media (max-width: 540px) { .footer-nav { flex-wrap: wrap; gap: 2rem; } }

.footer-col { display: flex; flex-direction: column; gap: 0.4rem; }
.footer-col-title {
  font-size: 0.65rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--muted); margin-bottom: 0.35rem;
}
.footer-link {
  font-size: 0.8rem; color: var(--body); text-decoration: none;
  transition: color 0.12s;
}
.footer-link:hover { color: var(--blue); }

.footer-bottom {
  max-width: var(--max-w); margin: 0 auto;
  padding: 1rem 2rem 1.5rem;
  border-top: 1px solid var(--line);
  font-size: 0.72rem; color: var(--muted);
  display: flex; gap: 0.75rem; align-items: center; flex-wrap: wrap;
}
.footer-sep { color: var(--line); }
.footer-link-sm { font-size: 0.72rem; color: var(--muted); text-decoration: none; }
.footer-link-sm:hover { color: var(--blue); }

/* ════════════════════════════
   UTILITY
════════════════════════════ */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}