:root {
  --bg: #0a0a0f;
  --bg-elevated: #12121a;
  --bg-card: #181822;
  --fg: #e8e8ed;
  --fg-muted: #8a8a99;
  --fg-dim: #5a5a6e;
  --accent: #3df5a7;
  --accent-dim: rgba(61, 245, 167, 0.12);
  --alert: #ff6b6b;
  --border: rgba(255,255,255,0.06);
  --radius: 12px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  padding: 6rem 5vw 6rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 70vw;
  height: 70vw;
  background: radial-gradient(circle, rgba(61,245,167,0.06) 0%, transparent 65%);
  pointer-events: none;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.4rem 1rem;
  border-radius: 100px;
  margin-bottom: 2rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 4.5vw, 4rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

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

.hero-sub {
  font-size: 1.1rem;
  color: var(--fg-muted);
  max-width: 520px;
  line-height: 1.7;
}

/* ── Hero Visual ── */
.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.8rem;
  position: relative;
}

.metric-card.card-alt {
  border-color: rgba(255,107,107,0.2);
  background: linear-gradient(135deg, var(--bg-card), rgba(255,107,107,0.04));
}

.metric-card.card-small {
  max-width: 220px;
  align-self: flex-end;
}

.metric-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 0.5rem;
}

.metric-value {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
}

.metric-value.alert {
  color: var(--alert);
  font-size: 1.3rem;
}

.metric-detail {
  font-size: 0.85rem;
  color: var(--fg-dim);
  margin-top: 0.3rem;
}

.metric-spark {
  margin-top: 0.8rem;
}

.spark-svg {
  width: 100%;
  height: 40px;
}

/* ── Problem ── */
.problem {
  padding: 8rem 5vw;
  border-top: 1px solid var(--border);
}

.problem-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.problem h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 4rem;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
}

.problem-num {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.problem-item p {
  color: var(--fg-muted);
  font-size: 1rem;
  line-height: 1.7;
}

/* ── Features ── */
.features {
  padding: 8rem 5vw;
  background: var(--bg-elevated);
}

.features-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 3rem;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.feature-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.2rem;
}

.feature-block.feature-large {
  grid-column: span 2;
  background: linear-gradient(135deg, var(--bg-card), rgba(61,245,167,0.03));
  border-color: rgba(61,245,167,0.15);
}

.feature-icon {
  font-size: 1.6rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.feature-block h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
}

.feature-block p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ── How ── */
.how {
  padding: 8rem 5vw;
  border-top: 1px solid var(--border);
}

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

.how-steps {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.how-step {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

.step-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  min-width: 50px;
  opacity: 0.5;
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.step-content p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ── Closing ── */
.closing {
  padding: 10rem 5vw;
  text-align: center;
  position: relative;
}

.closing::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(61,245,167,0.05) 0%, transparent 60%);
  pointer-events: none;
}

.closing-inner {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.closing-sub {
  font-size: 1.1rem;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* ── Footer ── */
.site-footer {
  padding: 3rem 5vw;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}

.footer-tagline {
  font-size: 0.85rem;
  color: var(--fg-dim);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 4rem 6vw 3rem;
    gap: 3rem;
  }

  .hero-visual {
    order: -1;
  }

  .metric-card.card-small {
    max-width: 100%;
    align-self: stretch;
  }

  .problem-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

  .feature-block.feature-large {
    grid-column: span 1;
  }

  .how-step {
    flex-direction: column;
    gap: 0.8rem;
  }

  .step-number {
    font-size: 1.8rem;
  }

  .problem,
  .features,
  .how {
    padding: 5rem 6vw;
  }

  .closing {
    padding: 6rem 6vw;
  }
}

/* ── Waitlist Form ── */
.waitlist-form-wrapper {
  margin-top: 2.5rem;
}

.waitlist-label {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--fg-muted);
  margin-bottom: 0.8rem;
}

.waitlist-form {
  display: flex;
  gap: 0.6rem;
  max-width: 460px;
}

.waitlist-form input[type="email"] {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.7rem 1rem;
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
  min-width: 0;
}

.waitlist-form input[type="email"]::placeholder {
  color: var(--fg-dim);
}

.waitlist-form input[type="email"]:focus {
  border-color: rgba(61, 245, 167, 0.5);
}

.waitlist-btn {
  background: var(--accent);
  color: #0a0a0f;
  border: none;
  border-radius: var(--radius);
  padding: 0.7rem 1.2rem;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.2s;
}

.waitlist-btn:hover:not(:disabled) {
  opacity: 0.88;
}

.waitlist-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.waitlist-success {
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 500;
  margin-top: 0.5rem;
}

.waitlist-error {
  font-size: 0.85rem;
  color: var(--alert);
  margin-top: 0.4rem;
}

@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .metric-value {
    font-size: 1.4rem;
  }

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

  .waitlist-btn {
    width: 100%;
  }
}