/* === PatentLens — Dan Koe Minimalist Style === */
/* Black/white, bold typography, massive whitespace */

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

:root {
  --black: #0a0a0a;
  --white: #ffffff;
  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #e5e5e5;
  --gray-300: #d4d4d4;
  --gray-400: #a3a3a3;
  --gray-500: #737373;
  --gray-600: #525252;
  --gray-700: #404040;
  --gray-800: #262626;
  --gray-900: #171717;
  --accent: #0a0a0a;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  background: var(--white);
  color: var(--black);
  line-height: 1.6;
  font-size: 16px;
}

/* Container */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* === Nav === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--gray-200);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--black);
  text-decoration: none;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-icon {
  font-size: 1.5rem;
}

.nav-cta {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--white);
  background: var(--black);
  padding: 8px 20px;
  border-radius: 8px;
  text-decoration: none;
  transition: opacity 0.2s;
}

.nav-cta:hover {
  opacity: 0.85;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font);
  font-weight: 600;
  font-size: 1rem;
  padding: 14px 32px;
  border-radius: 10px;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--black);
  color: var(--white);
}

.btn-primary:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--black);
  border: 2px solid var(--gray-300);
}

.btn-ghost:hover {
  border-color: var(--black);
}

.btn-sm {
  padding: 10px 24px;
  font-size: 0.875rem;
}

/* === Hero === */
.hero {
  padding: 160px 0 120px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-500);
  border: 1px solid var(--gray-200);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 32px;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 28px;
  color: var(--black);
}

.hero-accent {
  color: var(--gray-400);
}

.hero-sub {
  font-size: 1.2rem;
  color: var(--gray-500);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.hero-trust {
  font-size: 0.85rem;
  color: var(--gray-400);
  margin-top: 16px;
}

/* === Sections === */
.section {
  padding: 120px 0;
}

.section-dark {
  background: var(--gray-50);
}

.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 16px;
}

.section h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.section-sub {
  font-size: 1.15rem;
  color: var(--gray-500);
  max-width: 600px;
  line-height: 1.7;
}

/* === Value / Problem Cards === */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 60px;
}

.value-card {
  text-align: center;
}

.value-number {
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--black);
  margin-bottom: 8px;
}

.value-card p {
  color: var(--gray-500);
  font-size: 1rem;
  line-height: 1.5;
}

/* === Features Grid === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-top: 60px;
}

.feature-card {
  padding: 0;
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.feature-card p {
  color: var(--gray-500);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* === Steps === */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin-top: 60px;
}

.step-num {
  font-size: 4rem;
  font-weight: 900;
  color: var(--gray-200);
  letter-spacing: -0.04em;
  margin-bottom: 12px;
  line-height: 1;
}

.step h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.step p {
  color: var(--gray-500);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* === Comparison === */
.compare-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-top: 60px;
}

.compare-card {
  padding: 40px;
  border-radius: 16px;
  position: relative;
}

.compare-old {
  background: var(--white);
  border: 1px solid var(--gray-200);
}

.compare-new {
  background: var(--black);
  color: var(--white);
}

.compare-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--white);
  color: var(--black);
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.compare-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.compare-card ul {
  list-style: none;
  padding: 0;
}

.compare-card li {
  padding: 10px 0;
  font-size: 0.95rem;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.5;
}

.compare-old li {
  color: var(--gray-600);
  border-bottom: 1px solid var(--gray-100);
}

.compare-new li {
  color: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.x {
  color: var(--gray-400);
  font-weight: 600;
  flex-shrink: 0;
}

.check {
  color: #4ade80;
  font-weight: 600;
  flex-shrink: 0;
}

.compare-new .btn {
  margin-top: 24px;
  background: var(--white);
  color: var(--black);
  width: 100%;
}

.compare-new .btn:hover {
  opacity: 0.9;
}

/* === Audience === */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-top: 60px;
}

.audience-card {
  padding: 40px;
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  transition: border-color 0.2s;
}

.audience-card:hover {
  border-color: var(--gray-400);
}

.audience-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.audience-card p {
  color: var(--gray-500);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* === FAQ === */
.faq-list {
  max-width: 700px;
  margin-top: 60px;
}

.faq-item {
  border-bottom: 1px solid var(--gray-200);
  padding: 28px 0;
}

.faq-q {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  cursor: pointer;
  letter-spacing: -0.01em;
}

.faq-a {
  color: var(--gray-500);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* === Waitlist CTA === */
.section-cta {
  text-align: center;
  padding: 140px 0;
  background: var(--black);
  color: var(--white);
}

.section-cta h2 {
  color: var(--white);
}

.section-cta .section-sub {
  color: rgba(255, 255, 255, 0.6);
  margin: 0 auto 48px;
}

.waitlist-form {
  max-width: 480px;
  margin: 0 auto;
}

.form-row {
  display: flex;
  gap: 10px;
}

.form-row input {
  flex: 1;
  font-family: var(--font);
  font-size: 1rem;
  padding: 14px 20px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  outline: none;
  transition: border-color 0.2s;
}

.form-row input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.form-row input:focus {
  border-color: rgba(255, 255, 255, 0.5);
}

.form-row .btn-primary {
  background: var(--white);
  color: var(--black);
  white-space: nowrap;
  flex-shrink: 0;
}

.form-row .btn-primary:hover {
  opacity: 0.9;
}

.form-row .btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.section-cta .hero-trust {
  color: rgba(255, 255, 255, 0.35);
}

#formMessage {
  margin-top: 16px;
  font-size: 0.9rem;
}

#formMessage .success {
  color: #4ade80;
}

#formMessage .error {
  color: #f87171;
}

/* === Footer === */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--gray-200);
}

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

.footer-brand {
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-copy {
  color: var(--gray-400);
  font-size: 0.85rem;
}

/* === Responsive === */
@media (max-width: 768px) {
  .hero {
    padding: 130px 0 80px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-sub {
    font-size: 1.05rem;
  }

  .section {
    padding: 80px 0;
  }

  .section h2 {
    font-size: 1.8rem;
  }

  .value-grid,
  .features-grid,
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .compare-grid,
  .audience-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .hero-cta .btn {
    width: 100%;
    max-width: 300px;
  }

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

  .nav-inner {
    height: 56px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .value-number {
    font-size: 2.5rem;
  }

  .compare-card {
    padding: 28px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .container {
    padding: 0 16px;
  }
}