/* ============ HEADER ============ */
header.topbar {
  border-bottom: 1px solid var(--border);
  background: rgba(12, 12, 14, 0.92);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.topbar-inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 14px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
}

.brand .logo {
  font-family: var(--display);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--text-1);
  font-variation-settings: 'opsz' 144;
}

.brand .logo::first-letter {
  color: var(--accent);
}

.brand .tagline {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-3);
  border-left: 1px solid var(--border-bright);
  padding-left: 10px;
}

nav.primary {
  display: flex;
  gap: 22px;
}

nav.primary a {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-2);
  text-decoration: none;
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: color 150ms, border-color 150ms;
}

nav.primary a:hover {
  color: var(--text-1);
  border-bottom-color: var(--accent);
}

/* Theme toggle button */
.theme-toggle {
  background: transparent;
  border: 1px solid var(--border-bright);
  color: var(--text-2);
  padding: 6px 12px;
  cursor: pointer;
  font-size: 16px;
  transition: all 150ms;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 32px;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.theme-icon {
  display: block;
  line-height: 1;
}

/* ============ MAIN LAYOUT ============ */
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
}

section {
  margin-bottom: 100px;
}

.section-eyebrow {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-3);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(32px, 4vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-1);
  font-variation-settings: 'opsz' 144;
  margin-bottom: 32px;
}

.section-title em {
  font-style: italic;
  color: var(--accent);
}

.section-content {
  max-width: 720px;
}

.section-content p {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-2);
  margin-bottom: 16px;
}

/* ============ HERO ============ */
.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 80px 0 100px;
}

.hero-title {
  font-family: var(--display);
  font-weight: 300;
  font-size: clamp(40px, 5.5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text-1);
  margin-bottom: 24px;
  font-variation-settings: 'opsz' 144;
  max-width: 1000px;
}

.hero-sub {
  font-size: clamp(16px, 1.8vw, 18px);
  line-height: 1.6;
  color: var(--text-2);
  max-width: 700px;
  margin-bottom: 48px;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  text-decoration: none;
  padding: 14px 28px;
  border-radius: 2px;
  transition: all 150ms;
  display: inline-block;
  font-weight: 500;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border: 1px solid var(--accent);
}

.btn-primary:hover {
  background: var(--accent-bright);
  border-color: var(--accent-bright);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--text-1);
  border: 1px solid var(--border-bright);
}

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

.btn-large {
  padding: 16px 36px;
  font-size: 12px;
}

.trust-markers {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-4);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

/* ============ PROBLEM SECTION ============ */
.problem {
  padding-top: 80px;
  border-top: 1px solid var(--border);
}

/* ============ FEATURES GRID ============ */
.features {
  padding-top: 80px;
  border-top: 1px solid var(--border);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.feature-card {
  background: var(--surface-1);
  padding: 28px 24px;
  transition: background 150ms;
  min-height: 200px;
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  background: var(--surface-2);
}

.feature-num {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-3);
  letter-spacing: 0.14em;
  margin-bottom: 16px;
}

.feature-title {
  font-family: var(--display);
  font-size: 19px;
  line-height: 1.25;
  color: var(--text-1);
  margin-bottom: 12px;
  font-variation-settings: 'opsz' 96;
}

.feature-desc {
  font-family: var(--body);
  font-size: 13px;
  color: var(--text-3);
  line-height: 1.55;
  margin-top: auto;
}

/* ============ DEMO CTA ============ */
.demo-cta {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 56px;
  margin-top: 80px;
  margin-bottom: 80px;
}

.demo-cta-content {
  max-width: 720px;
}

.demo-cta-title {
  font-family: var(--display);
  font-weight: 400;
  font-size: 36px;
  letter-spacing: -0.02em;
  color: var(--text-1);
  margin-bottom: 16px;
  font-variation-settings: 'opsz' 144;
}

.demo-cta-desc {
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-2);
  margin-bottom: 32px;
}

/* ============ AUDIENCE ============ */
.audience {
  padding-top: 80px;
  border-top: 1px solid var(--border);
}

.audience-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
}

.audience-item {
  padding: 32px 28px;
  border-bottom: 1px solid var(--border);
  transition: background 150ms;
}

.audience-item:last-child {
  border-bottom: none;
}

.audience-item:hover {
  background: var(--surface-1);
}

.audience-title {
  font-family: var(--display);
  font-size: 20px;
  color: var(--text-1);
  margin-bottom: 8px;
  font-variation-settings: 'opsz' 96;
}

.audience-desc {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
}

/* ============ PRICING ============ */
.pricing {
  padding-top: 80px;
  border-top: 1px solid var(--border);
}

.pricing-note {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
  font-style: italic;
  margin-bottom: 40px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-top: 40px;
}

.tier-card {
  background: var(--surface-1);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  min-height: 480px;
  transition: background 150ms;
}

.tier-card:hover {
  background: var(--surface-2);
}

.tier-head {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.tier-name {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-3);
  margin-bottom: 14px;
}

.tier-price {
  font-family: var(--display);
  font-weight: 400;
  font-size: 36px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--accent);
  font-variation-settings: 'opsz' 144;
  margin-bottom: 10px;
}

.tier-price .per {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-3);
  letter-spacing: 0.04em;
  margin-left: 2px;
}

.tier-tagline {
  font-family: var(--body);
  font-size: 12px;
  color: var(--text-2);
  line-height: 1.45;
  font-style: italic;
}

.tier-features {
  list-style: none;
  padding: 0;
  margin: 0;
  flex-grow: 1;
}

.tier-features li {
  font-family: var(--body);
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.5;
  padding: 9px 0 9px 18px;
  position: relative;
  border-bottom: 1px solid var(--border);
}

.tier-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 9px;
  color: var(--accent);
  font-size: 11px;
}

.tier-features li:last-child {
  border-bottom: none;
}

.pricing-fineprint {
  margin-top: 28px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-4);
  font-style: italic;
  text-align: center;
  letter-spacing: 0.04em;
}

/* ============ FORM SECTION ============ */
.form-section {
  padding-top: 80px;
  border-top: 1px solid var(--border);
}

.signup-form {
  max-width: 640px;
  margin: 40px auto 0;
  padding: 36px;
  background: var(--surface-1);
  border: 1px solid var(--border);
}

.form-row {
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.form-row label:not(.cb) {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-3);
}

.req {
  color: var(--accent);
  font-weight: 500;
}

.hint {
  color: var(--text-3);
  text-transform: none;
  letter-spacing: normal;
  font-style: italic;
  font-size: 10px;
  margin-left: 4px;
}

.signup-form input[type="email"],
.signup-form input[type="text"],
.signup-form select,
.signup-form textarea {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-1);
  padding: 12px 14px;
  font-family: var(--body);
  font-size: 14px;
  border-radius: 0;
  width: 100%;
}

.signup-form input[type="email"]:focus,
.signup-form input[type="text"]:focus,
.signup-form select:focus,
.signup-form textarea:focus {
  border-color: var(--accent);
  outline: none;
  background: var(--surface-1);
}

.signup-form textarea {
  resize: vertical;
  min-height: 80px;
  font-family: var(--body);
}

.signup-form select {
  appearance: none;
  cursor: pointer;
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

/* Dark theme select arrow */
:root .signup-form select {
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%23999' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

/* Light theme select arrow */
[data-theme="light"] .signup-form select {
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%23333' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

/* Remove default option styling and patterns */
.signup-form select option {
  background: var(--surface-1);
  color: var(--text-1);
  padding: 8px 12px;
}

.signup-form select option:checked,
.signup-form select option:hover {
  background: var(--accent);
  color: var(--surface-1);
}

.checkbox-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 16px;
}

.cb {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-family: var(--body);
  font-size: 13px;
  color: var(--text-2);
  text-transform: none;
  letter-spacing: normal;
  cursor: pointer;
}

.cb input[type="checkbox"] {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
  margin: 0;
  flex-shrink: 0;
  cursor: pointer;
}

.cb:hover span {
  color: var(--text-1);
}

.hp {
  position: absolute;
  left: -9999px;
  height: 0;
  width: 0;
  overflow: hidden;
}

.form-footer {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--accent);
  color: var(--surface-1);
  border: none;
  padding: 14px 28px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: background 150ms;
}

.btn-primary:hover {
  background: var(--accent-bright);
}

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

.form-status {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-2);
}

.form-status.error {
  color: var(--critical);
}

.form-fineprint {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-3);
  font-style: italic;
  margin-top: 24px;
  line-height: 1.5;
}

.form-success {
  padding: 32px 0;
}

.form-success h3 {
  font-family: var(--display);
  font-weight: 400;
  font-size: 28px;
  color: var(--text-1);
  margin-bottom: 16px;
  font-variation-settings: 'opsz' 144;
}

.form-success p {
  font-family: var(--body);
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.6;
}

/* ============ FAQ ============ */
.faq {
  padding-top: 80px;
  border-top: 1px solid var(--border);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.faq-item {
  max-width: 720px;
}

.faq-question {
  font-family: var(--display);
  font-size: 20px;
  color: var(--text-1);
  margin-bottom: 12px;
  font-variation-settings: 'opsz' 96;
}

.faq-answer {
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-2);
}

/* ============ FOOTER ============ */
footer {
  border-top: 1px solid var(--border);
  margin-top: 100px;
  padding: 40px 32px;
  text-align: center;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-4);
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

footer .disclaim {
  margin-top: 12px;
  font-size: 10px;
  text-transform: none;
  letter-spacing: 0.04em;
  color: var(--text-4);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1100px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .tier-card {
    min-height: auto;
  }
}

@media (max-width: 900px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  main {
    padding: 0 24px;
  }

  section {
    margin-bottom: 80px;
  }

  .demo-cta {
    padding: 40px 32px;
  }
}

@media (max-width: 640px) {
  .topbar-inner {
    padding: 12px 18px;
    flex-wrap: wrap;
  }

  nav.primary {
    gap: 16px;
  }

  main {
    padding: 0 18px;
  }

  .hero {
    min-height: auto;
    padding: 60px 0 80px;
  }

  .hero-ctas {
    flex-direction: column;
    align-items: flex-start;
  }

  .btn {
    width: 100%;
    text-align: center;
  }

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

  .demo-cta {
    padding: 32px 24px;
  }

  section {
    margin-bottom: 60px;
  }

  .trust-markers {
    font-size: 9px;
  }

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

  .signup-form {
    padding: 24px;
  }

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