/* VikingHeat — Nordic technical minimalism */

@import url('/assets/fonts/fonts.css');

:root {
  --ink: #0E1B2C;
  --ink-2: #15243A;
  --ink-3: #1E2F47;
  --paper: #F7F5F1;
  --paper-2: #FFFFFF;
  --copper: #E87B45;
  --copper-deep: #C4622E;
  --line: #E5E2DB;
  --line-dark: #243349;
  --muted: #5A6573;
  --muted-dark: #8A99B0;
  --text: #0E1B2C;
  --good: #2F8F6F;
  --warn: #C99033;
  --radius: 6px;

  --font-sans: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--font-sans);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }

button { font-family: inherit; cursor: pointer; }

.mono {
  font-family: var(--font-mono);
  font-feature-settings: "zero", "ss02";
  letter-spacing: -0.01em;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ---- Top bar ---- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 245, 241, 0.85);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s, background .2s;
}
.topbar.scrolled {
  border-bottom-color: var(--line);
  background: rgba(247, 245, 241, 0.95);
}
.topbar-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 60px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-size: 17px;
}
.logo-mark {
  width: 22px; height: 22px;
  background: var(--ink);
  position: relative;
  border-radius: 2px;
}
.logo-mark::before, .logo-mark::after {
  content: "";
  position: absolute;
  background: var(--copper);
}
.logo-mark::before {
  inset: 4px 10px 4px 4px;
  background: var(--paper);
}
.logo-mark::after {
  inset: 7px 7px auto auto;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--copper);
}
.nav {
  display: flex;
  gap: 22px;
  font-size: 14px;
  color: var(--muted);
}
.nav a:hover { color: var(--text); }
.spacer { flex: 1; }

.pill-toggle {
  display: inline-flex;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
  font-size: 13px;
}
.pill-toggle button {
  border: 0;
  background: transparent;
  padding: 6px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 500;
  transition: all .15s;
}
.pill-toggle button.active {
  background: var(--ink);
  color: var(--paper);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: all .15s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-primary:hover { background: var(--ink-2); }
.btn-copper {
  background: var(--copper);
  color: white;
}
.btn-copper:hover { background: var(--copper-deep); }
.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}
.btn-ghost:hover { background: rgba(0,0,0,0.03); }
.btn-link {
  background: transparent;
  padding: 0;
  color: var(--text);
  border: 0;
  font-weight: 500;
  font-size: 14px;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  padding-bottom: 2px;
}
.btn-link:hover { border-bottom-color: var(--ink); }

/* ---- Sections ---- */
section { padding: 96px 0; }
.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.section-eyebrow::before {
  content: "";
  width: 16px; height: 1px;
  background: currentColor;
  display: inline-block;
}
.section-title {
  font-size: 44px;
  letter-spacing: -0.025em;
  font-weight: 500;
  margin: 0 0 12px;
  line-height: 1.1;
}
.section-sub {
  color: var(--muted);
  font-size: 17px;
  max-width: 540px;
  line-height: 1.5;
  margin: 0 0 48px;
}

/* dark sections */
.dark {
  background: var(--ink);
  color: var(--paper);
}
.dark .section-eyebrow,
.dark .section-sub { color: var(--muted-dark); }
.dark .btn-ghost { border-color: var(--line-dark); color: var(--paper); }
.dark .btn-ghost:hover { background: rgba(255,255,255,0.04); }
.dark .btn-primary { background: var(--paper); color: var(--ink); }
.dark .btn-link { color: var(--paper); border-bottom-color: var(--line-dark); }

/* hero */
.hero {
  padding: 56px 0 80px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: center;
}
.hero h1 {
  font-size: 68px;
  line-height: 0.98;
  letter-spacing: -0.035em;
  font-weight: 500;
  margin: 18px 0 24px;
  text-wrap: balance;
}
.hero h1 .accent { color: var(--copper); }
.hero-sub {
  font-size: 19px;
  line-height: 1.5;
  color: var(--muted);
  max-width: 520px;
  margin: 0 0 32px;
  text-wrap: pretty;
}
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-foot {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
  font-family: var(--font-mono);
}

/* placeholder image */
.ph {
  position: relative;
  background: repeating-linear-gradient(
    135deg,
    var(--line) 0 8px,
    transparent 8px 16px
  ), var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  overflow: hidden;
}
.ph-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  background: var(--ink);
  color: var(--paper);
  padding: 5px 10px;
  margin: 12px;
  border-radius: 3px;
  text-transform: uppercase;
}
.ph.dark { background: repeating-linear-gradient(135deg, #1f2e44 0 8px, transparent 8px 16px), var(--ink-2); border-color: var(--line-dark); }
.ph.dark .ph-label { background: var(--copper); }

.hero-image {
  aspect-ratio: 4 / 5;
  width: 100%;
}

/* trust bar */
.trustbar {
  padding: 36px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.trustbar-row {
  display: flex;
  align-items: center;
  gap: 36px;
  flex-wrap: wrap;
}
.trustbar-label {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.brand-logos {
  display: flex;
  gap: 36px;
  flex-wrap: wrap;
  align-items: center;
  flex: 1;
}
.brand-logo {
  font-weight: 600;
  font-size: 17px;
  color: #8a8a8a;
  letter-spacing: -0.01em;
  font-family: var(--font-sans);
  filter: grayscale(1);
  opacity: 0.85;
}
.brand-logo:hover { opacity: 1; }
.brand-more {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* value pillars */
.pillar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}
.pillar {
  padding: 36px 32px 32px 0;
  border-right: 1px solid var(--line);
}
.pillar:last-child { border-right: 0; padding-right: 0; }
.pillar:not(:first-child) { padding-left: 32px; }
.pillar-num {
  font-size: 64px;
  letter-spacing: -0.04em;
  font-weight: 500;
  line-height: 1;
  margin-bottom: 18px;
}
.pillar-num .unit {
  font-size: 28px;
  color: var(--muted);
  font-weight: 400;
  margin-left: 4px;
}
.pillar-num .copper { color: var(--copper); }
.pillar-desc {
  font-size: 16px;
  line-height: 1.5;
  color: var(--muted);
  margin: 0 0 20px;
  max-width: 280px;
}
.pillar-link {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text);
  border-bottom: 1px solid var(--ink);
  padding-bottom: 2px;
}

/* how it works */
.howto {
  background: var(--ink);
  color: var(--paper);
}
.howto-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 64px;
}
.howto-head .pill-toggle {
  background: var(--ink-2);
  border-color: var(--line-dark);
}
.howto-head .pill-toggle button { color: var(--muted-dark); }
.howto-head .pill-toggle button.active { background: var(--copper); color: white; }

.chapter {
  display: grid;
  grid-template-columns: 180px 1fr 1fr;
  gap: 48px;
  padding: 56px 0;
  border-top: 1px solid var(--line-dark);
  align-items: start;
}
.chapter:last-child { border-bottom: 1px solid var(--line-dark); }
.chapter-num {
  font-family: var(--font-mono);
  font-size: 60px;
  font-weight: 400;
  color: var(--copper);
  letter-spacing: -0.04em;
  line-height: 1;
}
.chapter-num .dot { opacity: 0.4; }
.chapter h3 {
  font-size: 28px;
  letter-spacing: -0.02em;
  font-weight: 500;
  margin: 0 0 16px;
  line-height: 1.15;
}
.chapter-body p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--muted-dark);
  margin: 0 0 16px;
  max-width: 440px;
}
.chapter-viz {
  background: var(--ink-2);
  border: 1px solid var(--line-dark);
  border-radius: 8px;
  padding: 24px;
  min-height: 220px;
  position: relative;
  overflow: hidden;
}

/* deep-dive code block */
.code-block {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--paper);
  background: #0a1422;
  border: 1px solid var(--line-dark);
  border-radius: 6px;
  padding: 18px 20px;
  overflow-x: auto;
  white-space: pre;
}
.code-block .c-key { color: var(--copper); }
.code-block .c-comment { color: #6b7d96; }
.code-block .c-str { color: #9bcca4; }

/* product trio */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.product-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color .15s, transform .2s;
}
.product-card:hover { border-color: var(--ink); }
.product-card .ph {
  border: 0;
  border-radius: 0;
  border-bottom: 1px solid var(--line);
  aspect-ratio: 4 / 3;
}
.product-card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.product-card h4 {
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.015em;
  margin: 0 0 8px;
}
.product-card p {
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--muted);
  margin: 0 0 24px;
  flex: 1;
}
.product-card-link {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text);
}
.product-card-link::after {
  content: " →";
  transition: margin-left .2s;
  display: inline-block;
}
.product-card:hover .product-card-link::after { margin-left: 4px; }

.tag-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 3px 8px;
  border-radius: 3px;
  color: var(--muted);
}

/* compatibility table */
.compat-search {
  display: flex;
  gap: 12px;
  margin-bottom: 28px;
  align-items: center;
}
.compat-search input {
  flex: 1;
  max-width: 360px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-family: var(--font-sans);
  font-size: 14px;
  background: var(--paper-2);
  outline: none;
  transition: border-color .15s;
}
.compat-search input:focus { border-color: var(--ink); }
.compat-count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.compat-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.compat-table th, .compat-table td {
  text-align: left;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
}
.compat-table th {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  background: var(--paper);
  font-weight: 500;
}
.compat-table tr:last-child td { border-bottom: 0; }
.compat-table tr:hover td { background: rgba(0,0,0,0.015); }

.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
}
.status-dot { width: 8px; height: 8px; border-radius: 50%; }
.status.full .status-dot { background: var(--good); }
.status.partial .status-dot { background: var(--warn); }
.status.beta .status-dot { background: var(--muted); }

/* case cards */
.case-row { margin-bottom: 24px; }
.case-row-label {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 12px;
}
.case-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  display: grid;
  grid-template-columns: 280px 1fr;
  overflow: hidden;
}
.case-card .ph { border: 0; border-radius: 0; border-right: 1px solid var(--line); }
.case-body {
  padding: 32px 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
}
.case-quote {
  font-size: 22px;
  line-height: 1.3;
  letter-spacing: -0.015em;
  font-weight: 400;
  margin: 0;
  text-wrap: pretty;
}
.case-meta {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  flex-wrap: wrap;
}
.case-stats {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.6;
}
.case-stats strong {
  color: var(--copper);
  font-weight: 500;
}
.case-author {
  font-size: 14px;
  color: var(--text);
}
.case-author small { display: block; color: var(--muted); margin-top: 2px; }

/* calculator */
.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 64px;
  align-items: start;
}
.calc-form { display: flex; flex-direction: column; gap: 28px; }
.calc-field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 10px;
}
.calc-field select,
.calc-field input[type="number"] {
  width: 100%;
  padding: 14px 16px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-family: var(--font-sans);
  font-size: 16px;
  outline: none;
  color: var(--text);
}
.calc-field select:focus, .calc-field input:focus { border-color: var(--ink); }

.calc-slider-row {
  display: flex; align-items: center; gap: 16px;
}
.calc-slider-row input[type="range"] { flex: 1; accent-color: var(--copper); }
.calc-slider-val {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 500;
  min-width: 70px;
  text-align: right;
}

.calc-result {
  background: var(--ink);
  color: var(--paper);
  border-radius: 10px;
  padding: 40px 36px;
  position: relative;
}
.calc-result-label {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted-dark);
  margin-bottom: 18px;
}
.calc-result-value {
  font-size: 56px;
  letter-spacing: -0.03em;
  font-weight: 500;
  line-height: 1;
  color: var(--copper);
  margin-bottom: 28px;
}
.calc-result-value .unit { color: var(--paper); font-size: 22px; margin-left: 4px; }
.calc-result-row {
  display: flex; justify-content: space-between;
  padding: 14px 0;
  border-top: 1px solid var(--line-dark);
  font-size: 14px;
}
.calc-result-row span:first-child { color: var(--muted-dark); }
.calc-result-row span:last-child { font-family: var(--font-mono); }
.calc-result-cta {
  display: flex; gap: 12px; margin-top: 28px;
}

/* installer teaser */
.installer-teaser {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 64px;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: center;
}
.installer-teaser h3 {
  font-size: 36px;
  letter-spacing: -0.02em;
  font-weight: 500;
  line-height: 1.1;
  margin: 0 0 16px;
}
.installer-teaser p {
  font-size: 16px;
  line-height: 1.55;
  color: var(--muted);
  margin: 0 0 28px;
  max-width: 460px;
}
.installer-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.installer-stat {
  border-left: 2px solid var(--copper);
  padding-left: 16px;
}
.installer-stat .num {
  font-size: 32px;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 6px;
}
.installer-stat .lbl {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.4;
}

/* faq */
.faq-list {
  border-top: 1px solid var(--line);
}
.faq-item {
  border-bottom: 1px solid var(--line);
}
.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  background: transparent;
  border: 0;
  padding: 22px 0;
  text-align: left;
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text);
}
.faq-q-icon {
  width: 18px; height: 18px;
  position: relative;
  flex-shrink: 0;
}
.faq-q-icon::before, .faq-q-icon::after {
  content: ""; position: absolute;
  background: var(--text); top: 50%; left: 0; right: 0; height: 1.5px;
  transition: transform .2s;
}
.faq-q-icon::after { transform: rotate(90deg); }
.faq-item.open .faq-q-icon::after { transform: rotate(0); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .25s ease, padding .2s;
  font-size: 15px;
  line-height: 1.6;
  color: var(--muted);
}
.faq-item.open .faq-a {
  max-height: 320px;
  padding: 0 0 22px;
}
.faq-a code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--paper);
  padding: 2px 6px;
  border-radius: 3px;
  border: 1px solid var(--line);
}

/* footer */
.footer {
  background: var(--ink);
  color: var(--paper);
  padding: 80px 0 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: 40px;
  margin-bottom: 56px;
}
.footer-brand { font-size: 17px; font-weight: 600; margin-bottom: 12px; }
.footer-brand-sub {
  color: var(--muted-dark);
  font-size: 13.5px;
  line-height: 1.55;
  max-width: 240px;
  font-family: var(--font-mono);
}
.footer h5 {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted-dark);
  margin: 0 0 18px;
  font-weight: 500;
}
.footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; font-size: 14px; }
.footer ul a { color: var(--paper); opacity: 0.85; }
.footer ul a:hover { opacity: 1; color: var(--copper); }
.footer-base {
  border-top: 1px solid var(--line-dark);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted-dark);
}
.status-pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 12px;
  color: var(--muted-dark);
}
.status-pill .status-dot { background: var(--good); box-shadow: 0 0 0 4px rgba(47,143,111,0.18); }

/* responsive */
@media (max-width: 980px) {
  .hero-grid, .calc-grid, .installer-teaser { grid-template-columns: 1fr; gap: 36px; }
  .hero h1 { font-size: 48px; }
  .pillar-grid, .product-grid { grid-template-columns: 1fr; }
  .pillar { border-right: 0; border-bottom: 1px solid var(--line); padding: 24px 0 !important; }
  .chapter { grid-template-columns: 1fr; gap: 20px; }
  .case-card { grid-template-columns: 1fr; }
  .case-card .ph { border-right: 0; border-bottom: 1px solid var(--line); aspect-ratio: 16/9; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  section { padding: 64px 0; }
  .nav { display: none; }
  .installer-teaser { padding: 36px; }
}