/* ================================================================
   USE CUSTOM AI — Minimal White Design System
   ================================================================ */

/* ── Variables ────────────────────────────────────────────────── */
:root {
  --black:      #0A0A0A;
  --gray-900:   #1A1A1A;
  --gray-700:   #404040;
  --gray-500:   #737373;
  --gray-400:   #9E9E9E;
  --gray-200:   #E5E5E5;
  --gray-100:   #F5F5F5;
  --gray-50:    #FAFAFA;
  --white:      #FFFFFF;
  --border:     #E8E8E8;
  --nav-h:      60px;
  --max-w:      1080px;
  --radius:     10px;
  --t:          0.2s ease;
}

/* ── Reset ────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: var(--white); color: var(--gray-900); line-height: 1.65; }
img, svg { display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { font-family: inherit; }

/* ── Layout ───────────────────────────────────────────────────── */
.wrap {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
}

.section {
  padding: 96px 0;
}

/* ── Typography helpers ───────────────────────────────────────── */
.section-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 20px;
}

.section-h2 {
  font-size: clamp(1.875rem, 3.5vw, 2.625rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.18;
  color: var(--black);
  margin-bottom: 20px;
}

.section-intro {
  font-size: 1.0625rem;
  color: var(--gray-500);
  line-height: 1.75;
  max-width: 520px;
  margin-bottom: 48px;
}

/* ── Buttons ──────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 8px;
  padding: 11px 22px;
  cursor: pointer;
  transition: opacity var(--t), background var(--t), color var(--t), border-color var(--t), transform var(--t);
  border: 1.5px solid transparent;
  white-space: nowrap;
  line-height: 1;
}

.btn-dark {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}
.btn-dark:hover { opacity: 0.82; }

.btn-outline {
  background: transparent;
  color: var(--gray-700);
  border-color: var(--border);
}
.btn-outline:hover { border-color: var(--gray-400); color: var(--black); }

.btn-full { width: 100%; justify-content: center; }

/* ── NAV ──────────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-wrap {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo img,
.footer-logo img {
  height: 55px;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--gray-500);
  padding: 6px 10px;
  border-radius: 6px;
  transition: color var(--t), background var(--t);
}
.nav-links a:hover { color: var(--black); background: var(--gray-100); }

.nav-cta { flex-shrink: 0; }

.burger {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.burger span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--black);
  border-radius: 2px;
  transition: var(--t);
}

/* ── HERO ─────────────────────────────────────────────────────── */
.hero {
  padding: calc(var(--nav-h) + 80px) 0 96px;
  border-bottom: 1px solid var(--border);
}

.hero-wrap {
  max-width: 680px;
}

.hero-kicker {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 28px;
}

.hero-h1 {
  font-size: clamp(2.5rem, 5.5vw, 4rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--black);
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 1.125rem;
  color: var(--gray-500);
  line-height: 1.75;
  max-width: 520px;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* ── TRUST ────────────────────────────────────────────────────── */
.trust {
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
}

.trust-line {
  font-size: 0.875rem;
  color: var(--gray-400);
  text-align: center;
  margin-bottom: 28px;
  letter-spacing: 0.01em;
}

.trust-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.trust-logos span {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--gray-300, #D1D1D1);
  text-transform: uppercase;
}

/* ── PROBLEM ──────────────────────────────────────────────────── */
.problem { border-bottom: 1px solid var(--border); }

.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.problem-item {
  padding: 40px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  transition: background var(--t);
}
.problem-item:hover { background: var(--gray-50); }
.problem-item:nth-child(2n) { border-right: none; }
.problem-item:nth-child(3),
.problem-item:nth-child(4) { border-bottom: none; }

.problem-num {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--gray-400);
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.problem-item h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--black);
  margin-bottom: 10px;
}

.problem-item p {
  font-size: 0.9375rem;
  color: var(--gray-500);
  line-height: 1.7;
}

/* ── SOLUTION ─────────────────────────────────────────────────── */
.solution { border-bottom: 1px solid var(--border); background: var(--gray-50); }

.solution-wrap {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 80px;
  align-items: start;
}

.solution-left .section-intro { margin-bottom: 32px; }
.solution-left .section-h2 { margin-bottom: 16px; }

.solution-right {
  display: flex;
  flex-direction: column;
  padding-top: 8px;
}

.sol-item {
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}
.sol-item:first-child { padding-top: 0; }
.sol-item:last-child { border-bottom: none; padding-bottom: 0; }

.sol-item h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--black);
  margin-bottom: 8px;
}

.sol-item p {
  font-size: 0.9rem;
  color: var(--gray-500);
  line-height: 1.7;
}

/* ── HOW IT WORKS ─────────────────────────────────────────────── */
.how { border-bottom: 1px solid var(--border); }

.how .section-h2 { margin-bottom: 56px; }

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  top: 20px;
  left: 20px;
  right: 20px;
  height: 1px;
  background: var(--border);
  z-index: 0;
}

.step { padding-right: 32px; position: relative; }

.step-n {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--black);
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
  transition: background var(--t), border-color var(--t);
}
.step:hover .step-n {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

.step h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--black);
  margin-bottom: 10px;
  line-height: 1.35;
}

.step p {
  font-size: 0.875rem;
  color: var(--gray-500);
  line-height: 1.7;
}

/* ── SERVICES ─────────────────────────────────────────────────── */
.services { border-bottom: 1px solid var(--border); background: var(--gray-50); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.service-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--t), border-color var(--t), transform var(--t);
}
.service-card:hover {
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  border-color: var(--gray-300, #d4d4d4);
  transform: translateY(-2px);
}

.service-card-featured {
  border-color: var(--black);
}
.service-card-featured:hover { border-color: var(--black); }

.service-tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 20px;
}
.service-card-featured .service-tag { color: var(--black); }

.service-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--black);
  margin-bottom: 14px;
  line-height: 1.3;
}

.service-card > p {
  font-size: 0.9rem;
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: 24px;
}

.service-card ul {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin-bottom: 28px;
  flex: 1;
}

.service-card li {
  font-size: 0.875rem;
  color: var(--gray-700);
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.service-card li::before {
  content: '';
  width: 4px;
  height: 4px;
  background: var(--gray-400);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 8px;
}

.service-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-500);
  transition: color var(--t);
  margin-top: auto;
  align-self: flex-start;
}
.service-link:hover { color: var(--black); }

/* ── RESULTS ──────────────────────────────────────────────────── */
.results { border-bottom: 1px solid var(--border); }

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 56px;
}

.metric {
  padding: 36px 28px;
  border-right: 1px solid var(--border);
}
.metric:last-child { border-right: none; }

.metric-val {
  font-size: 2.25rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--black);
  line-height: 1;
  margin-bottom: 8px;
}

.metric-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 10px;
}

.metric p {
  font-size: 0.8375rem;
  color: var(--gray-400);
  line-height: 1.65;
}

.testimonial {
  max-width: 680px;
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

.testimonial blockquote {
  font-size: 1.125rem;
  font-style: italic;
  font-weight: 300;
  color: var(--gray-700);
  line-height: 1.75;
  margin-bottom: 20px;
}

.testimonial figcaption {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--black);
}

.testimonial-role {
  font-size: 0.875rem;
  color: var(--gray-400);
}
.testimonial-role::before { content: '— '; }

/* ── CONTACT SECTION ──────────────────────────────────────────── */
.contact-section { background: var(--gray-50); border-bottom: 1px solid var(--border); }

.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-left .section-h2 { margin-bottom: 16px; }
.contact-left .section-intro { margin-bottom: 28px; }

.contact-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.contact-option {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--gray-500);
  transition: color var(--t);
}
.contact-option svg { color: var(--gray-400); flex-shrink: 0; }
.contact-option:hover { color: var(--black); }

/* ── FORM ─────────────────────────────────────────────────────── */
.contact-form {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--gray-700);
  letter-spacing: 0.01em;
}

.field input,
.field textarea {
  font-family: inherit;
  font-size: 0.9375rem;
  color: var(--black);
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: 7px;
  padding: 10px 14px;
  outline: none;
  transition: border-color var(--t), box-shadow var(--t);
  resize: none;
  width: 100%;
  line-height: 1.5;
}
.field input::placeholder,
.field textarea::placeholder { color: var(--gray-400); }
.field input:focus,
.field textarea:focus {
  border-color: var(--black);
  box-shadow: 0 0 0 3px rgba(0,0,0,0.06);
}
.field input.error,
.field textarea.error { border-color: #DC2626; }

.form-success {
  display: none;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: #16A34A;
  background: #F0FDF4;
  border: 1px solid #BBF7D0;
  border-radius: 7px;
  padding: 12px 16px;
}
.form-success.visible { display: flex; }

/* ── FOOTER ───────────────────────────────────────────────────── */
.footer {
  background: var(--white);
  border-top: 1px solid var(--border);
  padding-top: 56px;
}

.footer-wrap {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  padding-bottom: 48px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}


.footer-name {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--gray-400);
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--gray-400);
  line-height: 1.65;
  margin-top: 10px;
  max-width: 280px;
}

.footer-cols {
  display: flex;
  gap: 60px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-col-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 0.875rem;
  color: var(--gray-500);
  transition: color var(--t);
}
.footer-col a:hover { color: var(--black); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 18px 0;
}
.footer-bottom .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--gray-400);
}

/* ── REVEAL ANIMATION ─────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s cubic-bezier(0.4,0,0.2,1), transform 0.55s cubic-bezier(0.4,0,0.2,1);
}
.reveal.in {
  opacity: 1;
  transform: none;
}

/* ── RESPONSIVE ───────────────────────────────────────────────── */
@media (max-width: 960px) {
  .solution-wrap { grid-template-columns: 1fr; gap: 48px; }
  .steps { grid-template-columns: repeat(2, 1fr); gap: 40px; }
  .steps::before { display: none; }
  .services-grid { grid-template-columns: 1fr; max-width: 480px; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .metric:nth-child(2) { border-right: none; }
  .metric:nth-child(3) { border-right: 1px solid var(--border); }
  .contact-wrap { grid-template-columns: 1fr; gap: 48px; }
  .footer-wrap { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .burger { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    border-bottom: 1px solid var(--border);
    padding: 16px 28px 20px;
    gap: 2px;
    backdrop-filter: blur(12px);
  }
  .nav-links.open a { font-size: 1rem; padding: 10px 4px; }

  .section { padding: 64px 0; }
  .hero { padding: calc(var(--nav-h) + 52px) 0 64px; }
  .problem-grid { grid-template-columns: 1fr; }
  .problem-item { border-right: none; }
  .problem-item:nth-child(3),
  .problem-item:nth-child(4) { border-bottom: 1px solid var(--border); }
  .problem-item:last-child { border-bottom: none; }
  .steps { grid-template-columns: 1fr; gap: 32px; }
  .step { padding-right: 0; }
  .metrics { grid-template-columns: 1fr; }
  .metric { border-right: none; border-bottom: 1px solid var(--border); }
  .metric:last-child { border-bottom: none; }
  .footer-cols { flex-direction: column; gap: 28px; }
  .footer-bottom .wrap { flex-direction: column; gap: 6px; text-align: center; }
}

@media (max-width: 480px) {
  .hero-h1 { font-size: 2.125rem; }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .contact-form { padding: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { transition-duration: 0.01ms !important; }
}