@import url('https://fonts.googleapis.com/css2?family=Syne:wght@700;800&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  --black: #0a0a0a;
  --off-black: #111111;
  --dark-surface: #161616;
  --border: #2a2a2a;
  --border-bright: #3a3a3a;
  --yellow: #f5c842;
  --yellow-dim: rgba(245, 200, 66, 0.12);
  --yellow-glow: rgba(245, 200, 66, 0.06);
  --white: #f4f4f0;
  --white-dim: #a0a09a;
  --white-dimmer: #5a5a54;
  --red: #e85555;
  --green: #4caf82;
  --blue: #5b8af5;
  --orange: #f07a3a;
  --purple: #9d78f5;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--white);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 17px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Grain texture overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.4;
}

/* === HERO === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 100px 24px 80px;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 60% -10%, rgba(245, 200, 66, 0.07) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at -10% 100%, rgba(245, 200, 66, 0.04) 0%, transparent 55%);
  pointer-events: none;
}

.hero-grid-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--border) 20%, var(--border) 80%, transparent);
  opacity: 0.5;
  pointer-events: none;
}
.hero-grid-line:nth-child(1) { left: 20%; }
.hero-grid-line:nth-child(2) { left: 40%; }
.hero-grid-line:nth-child(3) { left: 60%; }
.hero-grid-line:nth-child(4) { left: 80%; }

.hero-inner {
  max-width: 880px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--yellow);
  margin-bottom: 32px;
  padding: 6px 14px;
  border: 1px solid rgba(245, 200, 66, 0.3);
  border-radius: 2px;
  background: var(--yellow-glow);
}

.hero-kicker::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--yellow);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(3.5rem, 9vw, 7rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--white);
  margin-bottom: 32px;
}

.hero h1 .accent {
  color: var(--yellow);
  display: block;
}

.hero-sub {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--white-dim);
  max-width: 600px;
  line-height: 1.65;
  margin-bottom: 48px;
}

.hero-sub strong {
  color: var(--white);
  font-weight: 500;
}

.email-form {
  display: flex;
  gap: 0;
  max-width: 480px;
  border: 1px solid var(--border-bright);
  border-radius: 3px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.email-form:focus-within {
  border-color: var(--yellow);
}

.email-form input[type="email"] {
  flex: 1;
  background: var(--dark-surface);
  border: none;
  outline: none;
  padding: 15px 20px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px;
  color: var(--white);
  min-width: 0;
}

.email-form input[type="email"]::placeholder {
  color: var(--white-dimmer);
}

.email-form button {
  background: var(--yellow);
  color: var(--black);
  border: none;
  padding: 15px 24px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.5px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s ease, transform 0.1s ease;
}

.email-form button:hover {
  background: #ffd730;
}

.email-form button:active {
  transform: scale(0.98);
}

.form-note {
  margin-top: 12px;
  font-size: 13px;
  color: var(--white-dimmer);
}

/* === PROBLEM === */
.problem {
  padding: 100px 24px;
  max-width: 960px;
  margin: 0 auto;
}

.problem-heading {
  font-family: 'Syne', sans-serif;
  font-size: clamp(0.7rem, 1.5vw, 0.85rem);
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--white-dimmer);
  margin-bottom: 48px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.problem-heading::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.problem-body {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--white-dim);
}

.problem-body strong {
  color: var(--white);
}

.problem-body .highlight {
  color: var(--yellow);
}

/* === TOPICS === */
.topics {
  padding: 80px 24px 100px;
  border-top: 1px solid var(--border);
}

.topics-inner {
  max-width: 960px;
  margin: 0 auto;
}

.topics-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 48px;
  gap: 24px;
  flex-wrap: wrap;
}

.topics-heading {
  font-family: 'Syne', sans-serif;
  font-size: clamp(0.7rem, 1.5vw, 0.85rem);
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--white-dimmer);
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.topic-card {
  background: var(--off-black);
  padding: 36px 28px;
  position: relative;
  transition: background 0.2s ease;
  cursor: default;
}

.topic-card:hover {
  background: var(--dark-surface);
}

.topic-card:hover .topic-icon {
  transform: scale(1.1);
}

.topic-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  display: block;
  transition: transform 0.2s ease;
  line-height: 1;
}

.topic-card h3 {
  font-family: 'Syne', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.topic-card p {
  font-size: 0.88rem;
  color: var(--white-dimmer);
  line-height: 1.55;
}

.topic-card .topic-tag {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 2px;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.topic-card:hover .topic-tag {
  opacity: 1;
}

.topic-card:nth-child(1) .topic-tag { background: rgba(232, 85, 85, 0.15); color: var(--red); }
.topic-card:nth-child(2) .topic-tag { background: rgba(76, 175, 130, 0.15); color: var(--green); }
.topic-card:nth-child(3) .topic-tag { background: rgba(91, 138, 245, 0.15); color: var(--blue); }
.topic-card:nth-child(4) .topic-tag { background: rgba(240, 122, 58, 0.15); color: var(--orange); }
.topic-card:nth-child(5) .topic-tag { background: rgba(157, 120, 245, 0.15); color: var(--purple); }
.topic-card:nth-child(6) .topic-tag { background: rgba(245, 200, 66, 0.15); color: var(--yellow); }

/* === HOW IT WORKS === */
.how {
  padding: 100px 24px;
  border-top: 1px solid var(--border);
  background: var(--off-black);
}

.how-inner {
  max-width: 960px;
  margin: 0 auto;
}

.how-heading {
  font-family: 'Syne', sans-serif;
  font-size: clamp(0.7rem, 1.5vw, 0.85rem);
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--white-dimmer);
  margin-bottom: 64px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.how-heading::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.how-steps {
  display: grid;
  grid-template-columns: 1fr 48px 1fr 48px 1fr;
  align-items: start;
  gap: 0;
}

.how-step {
  padding: 0 8px;
}

.step-num {
  font-family: 'Syne', sans-serif;
  font-size: 3rem;
  font-weight: 800;
  color: var(--yellow);
  line-height: 1;
  margin-bottom: 20px;
  opacity: 0.9;
}

.step-title {
  font-family: 'Syne', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
  line-height: 1.2;
}

.step-body {
  font-size: 0.95rem;
  color: var(--white-dimmer);
  line-height: 1.65;
}

.how-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 16px;
  color: var(--border-bright);
  font-size: 1.5rem;
}

/* === BOTTOM CTA === */
.cta-section {
  padding: 120px 24px;
  border-top: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.cta-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 80% at 50% 100%, rgba(245, 200, 66, 0.05) 0%, transparent 60%);
  pointer-events: none;
}

.cta-inner {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

.cta-inner h2 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.cta-inner h2 span {
  color: var(--yellow);
}

.cta-inner p {
  font-size: 1.1rem;
  color: var(--white-dim);
  margin-bottom: 40px;
  line-height: 1.65;
}

.cta-form {
  display: flex;
  gap: 0;
  max-width: 440px;
  margin: 0 auto;
  border: 1px solid var(--border-bright);
  border-radius: 3px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.cta-form:focus-within {
  border-color: var(--yellow);
}

.cta-form input[type="email"] {
  flex: 1;
  background: var(--dark-surface);
  border: none;
  outline: none;
  padding: 16px 20px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px;
  color: var(--white);
  min-width: 0;
}

.cta-form input[type="email"]::placeholder {
  color: var(--white-dimmer);
}

.cta-form button {
  background: var(--yellow);
  color: var(--black);
  border: none;
  padding: 16px 24px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.5px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s ease;
}

.cta-form button:hover {
  background: #ffd730;
}

.cta-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--white-dimmer);
}

/* === SUCCESS MESSAGE === */
.signup-success {
  display: none;
  background: rgba(76, 175, 130, 0.1);
  border: 1px solid rgba(76, 175, 130, 0.3);
  border-radius: 3px;
  padding: 16px 24px;
  color: var(--green);
  font-weight: 500;
  font-size: 15px;
  text-align: center;
}

/* === FOOTER === */
.site-footer {
  padding: 40px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand {
  font-family: 'Syne', sans-serif;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
}

.footer-brand span {
  color: var(--yellow);
}

.footer-copy {
  font-size: 13px;
  color: var(--white-dimmer);
}

/* === INLINE SCRIPTS === */
.js-form-wrap.submitted .email-form,
.js-form-wrap.submitted .cta-form { display: none; }
.js-form-wrap.submitted .signup-success { display: block; }

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .hero {
    padding: 80px 20px 60px;
    min-height: auto;
    padding-top: 80px;
  }

  .hero h1 {
    font-size: clamp(3rem, 11vw, 4.5rem);
  }

  .email-form {
    flex-direction: column;
    border-radius: 3px;
  }

  .email-form input[type="email"],
  .email-form button {
    width: 100%;
    padding: 14px 20px;
  }

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

  .how-steps {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .how-arrow {
    display: none;
  }

  .cta-form {
    flex-direction: column;
  }

  .cta-form input[type="email"],
  .cta-form button {
    width: 100%;
    padding: 14px 20px;
  }

  .problem-body {
    font-size: clamp(1.3rem, 5vw, 1.8rem);
  }

  .hero-grid-line { display: none; }

  .site-footer {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }
}