:root {
  --bg: #080808;
  --bg-soft: #121212;
  --panel: #141414;
  --panel-2: #1a1a1a;
  --border: #262626;
  --text: #f5f5f5;
  --muted: #a1a1aa;
  --accent: #ff3b30;
  --accent-soft: rgba(255, 59, 48, 0.12);
  --max: 1120px;
  --radius: 22px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(255, 59, 48, 0.14), transparent 28%),
    linear-gradient(180deg, #0a0a0a 0%, #060606 100%);
  line-height: 1.6;
}

a {
  color: inherit;
}

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

.container {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(8, 8, 8, 0.78);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.site-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.brand {
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: -0.045em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.brand::after {
  content: ".";
}

.nav-links {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 700;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.95rem 1.35rem;
  border-radius: 999px;
  background: var(--accent);
  color: white;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.02em;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 35px rgba(255, 59, 48, 0.18);
}

.cta.secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.hero {
  padding: 5rem 0 3rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.8rem;
  background: var(--accent-soft);
  color: #ffd6d2;
  border: 1px solid rgba(255, 59, 48, 0.24);
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  font-weight: 800;
}

.hero-grid,
.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.85fr);
  gap: 2rem;
}

.hero h1,
.page-title {
  margin: 1rem 0;
  font-size: clamp(2.4rem, 4.4vw, 4.4rem);
  line-height: 0.96;
  letter-spacing: -0.05em;
}

.hero p,
.lead {
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 62ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.8rem;
}

.card,
.sidebar-card,
.feature-card,
.metric-card,
.article-card,
.quote-card,
.faq-card {
  background: linear-gradient(180deg, rgba(22, 22, 22, 0.98), rgba(14, 14, 14, 0.98));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-panel,
.sidebar-card,
.article-card,
.feature-card,
.metric-card {
  padding: 1.35rem;
}

.panel-list,
.check-list,
.link-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.panel-list li,
.check-list li,
.link-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.panel-list li:last-child,
.check-list li:last-child,
.link-list li:last-child {
  border-bottom: 0;
}

.section {
  padding: 1.5rem 0 3rem;
}

.section-intro {
  max-width: 58rem;
  margin-bottom: 1.4rem;
}

.section-intro p {
  color: var(--muted);
  font-size: 1.02rem;
}

.section h2 {
  font-size: clamp(1.65rem, 2vw, 2.5rem);
  letter-spacing: -0.04em;
  margin-bottom: 0.7rem;
}

.section h3 {
  font-size: 1.18rem;
  margin: 1.4rem 0 0.55rem;
}

.section p,
.section li {
  color: #d4d4d8;
}

.toc {
  position: sticky;
  top: 6rem;
}

.toc a,
.link-list a,
.article-card a,
.text-link {
  color: #f4f4f5;
  text-decoration: none;
}

.toc a:hover,
.link-list a:hover,
.article-card a:hover,
.text-link:hover {
  color: #fff;
  text-decoration: underline;
}

.grid-3,
.grid-2,
.metrics,
.article-grid {
  display: grid;
  gap: 1rem;
}

.grid-3,
.article-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-2,
.metrics {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feature-card h3,
.article-card h3,
.metric-card strong {
  margin-top: 0;
}

.article-card p,
.feature-card p,
.metric-card p {
  color: var(--muted);
}

.stat {
  display: block;
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.stat-sub {
  display: block;
  margin-top: 0.35rem;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.band {
  margin: 1rem 0 2rem;
  padding: 1.2rem 1.3rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(255, 59, 48, 0.1), rgba(255, 255, 255, 0.02));
}

.band strong {
  display: block;
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
}

.quote-card {
  padding: 1.35rem;
}

.quote-card p {
  margin: 0;
  color: #e4e4e7;
  font-size: 1.02rem;
  line-height: 1.72;
}

.quote-card strong {
  display: block;
  margin-top: 1rem;
  font-size: 0.95rem;
}

.faq-list {
  display: grid;
  gap: 1rem;
}

.faq-card {
  padding: 1.25rem 1.25rem 1.3rem;
}

.faq-card h3 {
  margin: 0 0 0.45rem;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1rem;
}

.pill {
  padding: 0.62rem 0.82rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
  color: #f5f5f5;
  font-size: 0.86rem;
  font-weight: 800;
}

.cta-strip {
  margin-top: 1.4rem;
  padding: 1.2rem 1.25rem;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, rgba(255, 59, 48, 0.12), rgba(255, 255, 255, 0.02));
}

.cta-strip p {
  margin: 0 0 0.9rem;
  color: #f4f4f5;
}

.site-footer {
  margin-top: 4rem;
  padding: 3rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(0, 0, 0, 0.38);
}

.footer-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1.4fr 1fr 1fr;
}

.footer-grid p,
.footer-grid a {
  color: var(--muted);
  text-decoration: none;
}

.footer-grid a:hover {
  color: var(--text);
}

.footer-note {
  margin-top: 2rem;
  color: #71717a;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.calculator {
  display: grid;
  gap: 1rem;
}

.field {
  display: grid;
  gap: 0.45rem;
}

.field label {
  font-size: 0.95rem;
  font-weight: 700;
}

.field input {
  width: 100%;
  padding: 0.95rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: #101010;
  color: var(--text);
  font: inherit;
}

.field textarea,
.field select {
  width: 100%;
  padding: 0.95rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: #101010;
  color: var(--text);
  font: inherit;
}

.field textarea {
  min-height: 140px;
  resize: vertical;
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: 0;
  border-color: rgba(255, 59, 48, 0.7);
  box-shadow: 0 0 0 4px rgba(255, 59, 48, 0.12);
}

.form-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.form-card {
  padding: 1.35rem;
}

.mini-note {
  color: var(--muted);
  font-size: 0.92rem;
}

.hidden-field {
  position: absolute;
  left: -9999px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  align-items: center;
}

.calc-result {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.2rem;
}

.gallery {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.frame {
  background: linear-gradient(180deg, rgba(22, 22, 22, 0.98), rgba(12, 12, 12, 0.98));
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.frame img {
  width: 100%;
  height: auto;
}

.frame figcaption {
  padding: 0.95rem 1rem 1.05rem;
  color: var(--muted);
  font-size: 0.92rem;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  color: #ffd2cf;
}

@media (max-width: 960px) {
  .container {
    width: min(var(--max), calc(100% - 1.4rem));
  }

  .hero-grid,
  .content-grid,
  .footer-grid,
  .grid-3,
  .grid-2,
  .metrics,
  .article-grid,
  .gallery {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }

  .hero {
    padding: 3.75rem 0 2.25rem;
  }

  .hero p,
  .lead {
    font-size: 1rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-panel,
  .sidebar-card,
  .article-card,
  .feature-card,
  .metric-card,
  .quote-card,
  .faq-card {
    padding: 1.15rem;
  }

  .section {
    padding: 1rem 0 2.4rem;
  }

  .section h2 {
    margin-bottom: 0.55rem;
  }
}

@media (max-width: 640px) {
  .site-nav-inner {
    align-items: flex-start;
    padding: 0.85rem 0;
  }

  .nav-links {
    width: 100%;
    gap: 0.8rem;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 0.2rem;
    scrollbar-width: none;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .hero {
    padding-top: 2.8rem;
  }

  .hero h1,
  .page-title {
    font-size: 2.25rem;
    line-height: 1;
  }

  .cta {
    width: 100%;
    min-height: 52px;
  }

  .site-nav .cta {
    width: auto;
    min-height: 46px;
    padding: 0.8rem 1rem;
  }

  .section-intro p,
  .quote-card p {
    font-size: 0.98rem;
  }

  .brand {
    font-size: 1.05rem;
  }

  .article-card h3,
  .feature-card h3 {
    font-size: 1.05rem;
  }

  .stat {
    font-size: 1.7rem;
  }
}