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

:root {
  --slate-950: #0a0f1a;
  --slate-900: #0f172a;
  --slate-800: #1e293b;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-400: #94a3b8;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50:  #f8fafc;
  --white:     #ffffff;

  --teal-400: #2dd4bf;
  --teal-500: #14b8a6;
  --teal-600: #0d9488;
  --teal-900: #042f2e;

  --font-sans: 'DM Sans', sans-serif;
  --font-serif: 'Instrument Serif', serif;
  --font-mono: 'DM Mono', monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --max-width: 1040px;
  --section-gap: 5rem;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--slate-50);
  color: var(--slate-900);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}


/* NAV */

.nav {
  background: var(--slate-900);
  border-bottom: 1px solid var(--slate-800);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 58px;
}

.logo {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--white);
}


/* BUTTONS */

.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: opacity 0.15s, background 0.15s;
  line-height: 1;
}

.btn-primary {
  background: var(--teal-400);
  color: var(--slate-900);
}

.btn-primary:hover { background: var(--teal-500); }

.btn-ghost {
  background: transparent;
  color: var(--slate-400);
  border: 1px solid var(--slate-700);
}

.btn-ghost:hover {
  color: var(--white);
  border-color: var(--slate-500);
}

.btn-outline {
  background: transparent;
  color: var(--slate-900);
  border: 1px solid var(--slate-200);
}

.btn-outline:hover { background: var(--slate-100); }


/* HERO */

.hero {
  background: var(--slate-900);
  padding: 0;
  margin-bottom: var(--section-gap);
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 5rem 2rem 5rem;
}

.eyebrow {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal-400);
  font-family: var(--font-mono);
  margin-bottom: 1.5rem;
}

.headline {
  font-family: var(--font-serif);
  font-size: clamp(36px, 5vw, 58px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 400;
  color: var(--white);
  margin-bottom: 1.5rem;
  max-width: 760px;
}

.headline em {
  font-style: italic;
  color: var(--teal-400);
}

.sub {
  font-size: 18px;
  line-height: 1.65;
  color: var(--slate-400);
  max-width: 560px;
  margin-bottom: 2.5rem;
}

.demo-link {
  margin-top: 1rem;
  font-size: 14px;
  color: var(--slate-400);
}

.demo-link a {
  color: var(--teal-400);
  text-decoration: none;
}

.demo-link a:hover {
  text-decoration: underline;
}

.demo-note {
  color: var(--slate-600);
  font-size: 13px;
}


/* SECTION LABEL */

.section-label {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal-600);
  font-family: var(--font-mono);
  margin-bottom: 1.25rem;
  font-weight: 500;
}


/* PROBLEM */

.problem {
  padding: 0 2rem var(--section-gap);
}

.problem-text {
  font-size: 20px;
  line-height: 1.65;
  color: var(--slate-700);
  max-width: 720px;
  border-left: 3px solid var(--teal-400);
  padding-left: 1.75rem;
  font-weight: 400;
}


/* HOW IT WORKS */

.how {
  padding: 0 2rem var(--section-gap);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--slate-200);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.step {
  background: var(--white);
  padding: 2rem;
}

.step-num {
  font-size: 11px;
  color: var(--teal-600);
  font-family: var(--font-mono);
  margin-bottom: 1rem;
  letter-spacing: 0.04em;
  font-weight: 500;
}

.step-title {
  font-size: 20px;
  font-weight: 500;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
  color: var(--slate-900);
}

.step-body {
  font-size: 16px;
  line-height: 1.65;
  color: var(--slate-600);
}


/* FEATURES */

.features {
  padding: 0 2rem var(--section-gap);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--slate-200);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.feature {
  background: var(--white);
  padding: 1.75rem;
}

.feature-title {
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 0.6rem;
  color: var(--slate-900);
}

.feature-body {
  font-size: 15px;
  line-height: 1.65;
  color: var(--slate-600);
}


/* REGULATION */

.regulation {
  padding: 0 2rem var(--section-gap);
}

.reg-card {
  background: var(--slate-900);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2.5rem;
  border-left: 4px solid var(--teal-400);
}

.reg-date {
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-mono);
  margin-bottom: 0.75rem;
  color: var(--teal-400);
  letter-spacing: 0.04em;
}

.reg-body {
  font-size: 16px;
  line-height: 1.7;
  color: var(--slate-400);
  max-width: 700px;
}


/* PRICING */

.pricing {
  padding: 0 2rem var(--section-gap);
}

.plans {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--slate-200);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.plan {
  background: var(--white);
  padding: 2rem;
  display: flex;
  flex-direction: column;
}

.plan-featured {
  background: var(--slate-900);
}

.plan-badge {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-family: var(--font-mono);
  background: var(--teal-400);
  color: var(--slate-900);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
  align-self: flex-start;
  font-weight: 500;
}

.plan:not(.plan-featured) .plan-name::before {
  content: '';
  display: block;
  height: 28px;
  margin-bottom: 0.75rem;
}

.plan-name {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-family: var(--font-mono);
  color: var(--slate-400);
  margin-bottom: 1rem;
}

.plan-featured .plan-name {
  color: var(--slate-400);
}

.plan-price {
  font-size: 40px;
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 0.3rem;
  color: var(--slate-900);
}

.plan-featured .plan-price {
  color: var(--white);
}

.plan-period {
  font-size: 12px;
  color: var(--slate-400);
  margin-bottom: 2rem;
  font-family: var(--font-mono);
}

.plan-features {
  list-style: none;
  flex: 1;
  margin-bottom: 2rem;
}

.plan-features li {
  font-size: 14px;
  color: var(--slate-600);
  padding: 9px 0;
  border-top: 1px solid var(--slate-100);
  line-height: 1.5;
}

.plan-featured .plan-features li {
  color: var(--slate-400);
  border-top-color: var(--slate-800);
}

.plan-features li:first-child {
  border-top: none;
  padding-top: 0;
}

.plan-btn {
  width: 100%;
  text-align: center;
  padding: 12px 20px;
  font-size: 14px;
}

.plan-featured .plan-btn {
  background: var(--teal-400);
  color: var(--slate-900);
  border: none;
}

.plan-featured .plan-btn:hover {
  background: var(--teal-500);
}


/* FORM */

.access {
  padding: 0 2rem var(--section-gap);
}

.form-wrap {
  max-width: 540px;
}

.form-title {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  color: var(--slate-900);
}

.form-sub {
  font-size: 16px;
  line-height: 1.65;
  color: var(--slate-600);
  margin-bottom: 2rem;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field label {
  font-size: 13px;
  font-weight: 500;
  color: var(--slate-700);
}

.optional {
  font-weight: 400;
  color: var(--slate-400);
}

.field input,
.field textarea {
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--slate-900);
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  padding: 11px 14px;
  outline: none;
  transition: border-color 0.15s;
  resize: vertical;
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--slate-400);
}

.field input:focus,
.field textarea:focus {
  border-color: var(--teal-400);
  box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.12);
}

.form-submit {
  align-self: flex-start;
  padding: 13px 32px;
  font-size: 15px;
}

.form-success {
  display: none;
  font-size: 16px;
  color: var(--teal-600);
  padding: 1rem 0;
  font-weight: 500;
}


/* FOOTER */

.footer {
  background: var(--slate-900);
  border-top: 1px solid var(--slate-800);
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--slate-400);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-size: 13px;
  color: var(--slate-500);
  text-decoration: none;
}

.footer-links a:hover { color: var(--slate-300); }


/* RESPONSIVE */

@media (max-width: 720px) {
  .steps,
  .feature-grid,
  .plans {
    grid-template-columns: 1fr;
  }

  .headline { font-size: 32px; }
  .sub { font-size: 16px; }
  .hero-inner { padding: 3.5rem 1.5rem; }
  :root { --section-gap: 3.5rem; }
}