*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #080808;
  --bg-card: #0f0f0f;
  --bg-card-hover: #141414;
  --border: #1e1e1e;
  --border-accent: #2a2a2a;
  --text: #e8e8e8;
  --text-muted: #888;
  --text-dim: #555;
  --accent: #c0392b;
  --accent-dim: rgba(192, 57, 43, 0.15);
  --accent-glow: rgba(192, 57, 43, 0.06);
  --white: #ffffff;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ── TYPOGRAPHY ── */
h1, h2, h3 {
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

/* ── NAV ── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(8, 8, 8, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.nav-logo span {
  color: var(--accent);
}

.nav-cta {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
  border: 1px solid var(--accent);
  padding: 0.4rem 1rem;
  border-radius: 2px;
  transition: background 0.2s, color 0.2s;
}

.nav-cta:hover {
  background: var(--accent);
  color: var(--white);
}

/* ── HERO ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem 2rem 10rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(192, 57, 43, 0.07) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 20% 80%, rgba(192, 57, 43, 0.04) 0%, transparent 60%);
  pointer-events: none;
}

.hero-title-wrap {
  position: relative;
  padding: 1.5rem 2rem;
  margin-bottom: -0.5rem;
}

.hero-title-wrap::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border-accent) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-accent) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.6;
  mask-image: radial-gradient(ellipse 90% 90% at 50% 50%, black 0%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 90% at 50% 50%, black 0%, transparent 100%);
  pointer-events: none;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2rem;
  padding: 0.4rem 1rem;
  border: 1px solid rgba(192, 57, 43, 0.3);
  border-radius: 100px;
  background: var(--accent-dim);
}

.hero-eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 5.5rem);
  font-weight: 800;
  color: var(--white);
  max-width: 900px;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-muted);
  max-width: 680px;
  line-height: 1.7;
  margin-bottom: 3rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: var(--white);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.9rem 2rem;
  border-radius: 2px;
  transition: opacity 0.2s, transform 0.2s;
}

.btn-primary:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-decoration: none;
  padding: 0.9rem 2rem;
  border: 1px solid var(--border-accent);
  border-radius: 2px;
  transition: border-color 0.2s, color 0.2s;
}

.btn-secondary:hover {
  border-color: var(--text-dim);
  color: var(--text);
}

.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-dim);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrolldown 2s ease-in-out infinite;
}

@keyframes scrolldown {
  0% { transform: scaleY(0); transform-origin: top; opacity: 0; }
  40% { transform: scaleY(1); transform-origin: top; opacity: 1; }
  60% { transform: scaleY(1); transform-origin: bottom; opacity: 1; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* ── DIVIDER ── */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* ── SECTION ── */
.section {
  padding: 6rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.section-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  color: var(--white);
  max-width: 700px;
  margin-bottom: 1rem;
}

.section-intro {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 620px;
  line-height: 1.75;
  margin-bottom: 4rem;
}

/* ── ARGUMENTS GRID ── */
.arguments-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5px;
  background: var(--border);
  border: 1px solid var(--border);
}

.arg-card {
  background: var(--bg-card);
  padding: 2.5rem;
  position: relative;
  transition: background 0.25s;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeup 0.6s ease forwards;
}

.arg-card:hover {
  background: var(--bg-card-hover);
}

.arg-card:nth-child(1) { animation-delay: 0.1s; }
.arg-card:nth-child(2) { animation-delay: 0.2s; }
.arg-card:nth-child(3) { animation-delay: 0.3s; }
.arg-card:nth-child(4) { animation-delay: 0.4s; }
.arg-card:nth-child(5) { animation-delay: 0.5s; }
.arg-card:nth-child(6) { animation-delay: 0.6s; }

@keyframes fadeup {
  to { opacity: 1; transform: translateY(0); }
}

.arg-number {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1;
  color: var(--border-accent);
  margin-bottom: 1.5rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.04em;
  transition: color 0.25s;
}

.arg-card:hover .arg-number {
  color: var(--accent-dim);
}

.arg-card:hover .arg-number {
  color: rgba(192, 57, 43, 0.25);
}

.arg-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.arg-body {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.75;
}

.arg-accent-bar {
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.4s ease;
}

.arg-card:hover .arg-accent-bar {
  width: 100%;
}

/* ── CLAIM BANNER ── */
.claim-banner {
  background: var(--accent);
  padding: 5rem 2rem;
  text-align: center;
}

.claim-banner-inner {
  max-width: 800px;
  margin: 0 auto;
}

.claim-banner h2 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  color: var(--white);
  margin-bottom: 1.25rem;
  letter-spacing: -0.025em;
}

.claim-banner p {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.75;
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

.btn-white {
  display: inline-block;
  background: var(--white);
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.9rem 2.2rem;
  border-radius: 2px;
  transition: opacity 0.2s;
}

.btn-white:hover {
  opacity: 0.9;
}

/* ── FOOTER ── */
footer {
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  max-width: 1100px;
  margin: 0 auto;
}

.footer-logo {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.footer-logo span {
  color: var(--accent);
}

.footer-note {
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  nav {
    padding: 1rem 1.25rem;
  }

  .hero {
    padding: 7rem 1.25rem 5rem;
  }

  .section {
    padding: 4rem 1.25rem;
  }

  .arguments-grid {
    grid-template-columns: 1fr;
  }

  .arg-card {
    padding: 2rem 1.5rem;
  }

  footer {
    padding: 2rem 1.25rem;
    flex-direction: column;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .arg-card {
    opacity: 1;
    transform: none;
    animation: none;
  }
  .scroll-line {
    animation: none;
  }
}