/* ========================================
   Arcline — Style System
   ======================================== */

:root {
  --ink: #0f172a;
  --ink-light: #475569;
  --ink-lighter: #94a3b8;
  --surface: #ffffff;
  --surface-alt: #f1f5f9;
  --surface-dark: #0b0f1a;
  --surface-dark-alt: #131a2b;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-subtle: #eef2ff;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --success: #059669;
  --radius: 8px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.04);
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-lg: 0 4px 12px rgba(0,0,0,.06);
  --transition: 180ms ease;
  --max-w: 1120px;
}

/* reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--ink);
  background: var(--surface);
  line-height: 1.6;
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font: inherit; border: none; background: none; }
ul { list-style: none; }
input, textarea { font: inherit; }

/* ---- typography ---- */
h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -.02em;
}
h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.15rem; }
p { color: var(--ink-light); }

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-weight: 500;
  font-size: .938rem;
  transition: all var(--transition);
  letter-spacing: -.01em;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(79,70,229,.25);
}
.btn-outline {
  border: 1.5px solid var(--border);
  color: var(--ink);
  background: var(--surface);
}
.btn-outline:hover {
  border-color: var(--ink-lighter);
  background: var(--surface-alt);
}
.btn-dark {
  background: var(--ink);
  color: #fff;
}
.btn-dark:hover {
  background: #1e293b;
}

/* ---- navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 24px;
  transition: all var(--transition);
}
.nav.scrolled {
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -.03em;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav.at-top .nav-logo { color: #fff; }
.nav-logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  background: var(--accent);
  border-radius: 10px;
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: .02em;
  font-style: normal;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a {
  font-size: .875rem;
  font-weight: 450;
  color: var(--ink-light);
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--ink); }
.nav.at-top .nav-links a { color: rgba(255,255,255,.65); }
.nav.at-top .nav-links a:hover { color: #fff; }
.nav-cta .btn {
  padding: 9px 20px;
  font-size: .84rem;
}
.nav.at-top .nav-cta .btn-outline {
  border-color: rgba(255,255,255,.2);
  color: #fff;
  background: transparent;
}
.nav.at-top .nav-cta .btn-outline:hover {
  border-color: rgba(255,255,255,.4);
  background: rgba(255,255,255,.06);
}

/* mobile nav */
.nav-toggle {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--ink);
  transition: all var(--transition);
}
.nav.at-top .nav-toggle span { background: #fff; }

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links, .nav-cta {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--surface);
    padding: 24px;
    flex-direction: column;
    gap: 20px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
  }
  .nav-links.open, .nav-cta.open { display: flex; }
  .nav.at-top .nav-links a { color: var(--ink-light); }
  .nav.at-top .nav-links.open { background: var(--surface); }
  .nav.at-top .nav-cta .btn-outline {
    border-color: var(--border);
    color: var(--ink);
  }
}

/* ---- hero ---- */
.hero {
  background: var(--surface-dark);
  padding: 160px 24px 120px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(79,70,229,.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(99,102,241,.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 8px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 100px;
  font-size: .8rem;
  color: rgba(255,255,255,.6);
  margin-bottom: 32px;
}
.hero-badge i {
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
  display: inline-block;
}
.hero h1 {
  color: #fff;
  max-width: 680px;
  margin-bottom: 20px;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent);
  background: linear-gradient(135deg, #818cf8, #6366f1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  color: rgba(255,255,255,.5);
  font-size: 1.12rem;
  max-width: 520px;
  line-height: 1.7;
  margin-bottom: 40px;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.hero-actions .btn-outline {
  border-color: rgba(255,255,255,.15);
  color: rgba(255,255,255,.75);
  background: transparent;
}
.hero-actions .btn-outline:hover {
  border-color: rgba(255,255,255,.3);
  color: #fff;
  background: rgba(255,255,255,.04);
}
.hero-visual {
  margin-top: 80px;
  background: var(--surface-dark-alt);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: var(--radius-lg);
  padding: 2px;
  position: relative;
}
.hero-visual-inner {
  background: linear-gradient(180deg, #151c2f 0%, #0f1525 100%);
  border-radius: 12px;
  padding: 40px;
  min-height: 280px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
}
.hv-card {
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: var(--radius);
  padding: 24px;
}
.hv-card-label {
  font-size: .75rem;
  color: rgba(255,255,255,.35);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 12px;
}
.hv-card-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}
.hv-card-change {
  font-size: .8rem;
  color: #34d399;
}
.hv-card-change.down { color: #f87171; }
.hv-bar {
  height: 4px;
  background: rgba(255,255,255,.06);
  border-radius: 2px;
  margin-top: 16px;
  overflow: hidden;
}
.hv-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
}

@media (max-width: 768px) {
  .hero { padding: 130px 24px 80px; }
  .hero-visual-inner {
    grid-template-columns: 1fr;
    padding: 24px;
  }
}

/* ---- trust bar ---- */
.trust {
  padding: 56px 24px;
  border-bottom: 1px solid var(--border-light);
}
.trust-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  text-align: center;
}
.trust p {
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--ink-lighter);
  margin-bottom: 28px;
}
.trust-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}
.trust-logo {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink-lighter);
  opacity: .5;
  letter-spacing: -.02em;
}

/* ---- features ---- */
.features {
  padding: 100px 24px;
}
.features-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.section-label {
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 12px;
}
.section-title {
  margin-bottom: 16px;
}
.section-desc {
  max-width: 540px;
  margin-bottom: 56px;
  font-size: 1.05rem;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  padding: 32px 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}
.feature-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}
.feature-card:first-child {
  grid-row: span 2;
  background: var(--surface-alt);
  border-color: transparent;
}
.feature-card:first-child:hover {
  border-color: var(--accent);
}
.feature-icon {
  width: 40px;
  height: 40px;
  background: var(--accent-subtle);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--accent);
  font-size: 1.1rem;
}
.feature-card h3 {
  margin-bottom: 10px;
  color: var(--ink);
}
.feature-card p {
  font-size: .9rem;
  line-height: 1.65;
}

@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
  .feature-card:first-child { grid-row: span 1; }
}

/* ---- platform / how it works ---- */
.platform {
  padding: 100px 24px;
  background: var(--surface-alt);
}
.platform-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.platform-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-top: 56px;
}
.step {
  position: relative;
}
.step-num {
  font-size: .78rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}
.step h3 {
  margin-bottom: 10px;
}
.step p {
  font-size: .9rem;
  line-height: 1.65;
}
.step + .step::before {
  content: '';
  position: absolute;
  left: -20px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

@media (max-width: 768px) {
  .platform-steps {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .step + .step::before {
    left: 0;
    top: -16px;
    bottom: auto;
    width: 40px;
    height: 1px;
  }
}

/* ---- stats ---- */
.stats {
  padding: 80px 24px;
  background: var(--surface-dark);
}
.stats-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.stat {
  text-align: center;
}
.stat-value {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  color: #fff;
  letter-spacing: -.03em;
  margin-bottom: 6px;
}
.stat-label {
  font-size: .84rem;
  color: rgba(255,255,255,.4);
}

@media (max-width: 768px) {
  .stats-inner {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px 24px;
  }
}

/* ---- testimonial ---- */
.testimonial {
  padding: 100px 24px;
}
.testimonial-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.testimonial blockquote {
  font-size: clamp(1.15rem, 2.5vw, 1.4rem);
  line-height: 1.7;
  color: var(--ink);
  font-weight: 400;
  margin-bottom: 28px;
}
.testimonial-author {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
}
.testimonial-avatar {
  width: 44px;
  height: 44px;
  background: var(--accent-subtle);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: var(--accent);
  font-size: .85rem;
}
.testimonial-info strong {
  display: block;
  font-size: .9rem;
  font-weight: 600;
}
.testimonial-info span {
  font-size: .82rem;
  color: var(--ink-lighter);
}

/* ---- contact / subscribe ---- */
.contact {
  padding: 100px 24px;
  background: var(--surface-alt);
}
.contact-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.contact-text h2 { margin-bottom: 16px; }
.contact-text > p { margin-bottom: 32px; font-size: 1.05rem; }
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.contact-info-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.contact-info-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-subtle);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
  font-size: .85rem;
}
.contact-info-item strong {
  display: block;
  font-size: .88rem;
  margin-bottom: 2px;
}
.contact-info-item p {
  font-size: .84rem;
  margin: 0;
}

.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-group {
  margin-bottom: 18px;
}
.form-group label {
  display: block;
  font-size: .82rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 6px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .9rem;
  color: var(--ink);
  background: var(--surface);
  transition: border-color var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79,70,229,.08);
}
.form-group textarea {
  resize: vertical;
  min-height: 90px;
}
.form-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 22px;
}
.form-check input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin-top: 2px;
  accent-color: var(--accent);
  flex-shrink: 0;
}
.form-check label {
  font-size: .82rem;
  color: var(--ink-light);
  line-height: 1.5;
}
.form-submit {
  width: 100%;
}
.form-success {
  display: none;
  text-align: center;
  padding: 32px 16px;
}
.form-success.show { display: block; }
.form-success-icon {
  width: 52px;
  height: 52px;
  background: #ecfdf5;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--success);
  font-size: 1.3rem;
}
.form-success h3 { margin-bottom: 8px; }
.form-success p { font-size: .9rem; }

@media (max-width: 768px) {
  .contact-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .form-row { grid-template-columns: 1fr; }
}

/* ---- footer ---- */
.footer {
  padding: 64px 24px 32px;
  background: var(--surface-dark);
  color: rgba(255,255,255,.5);
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.footer-brand p {
  color: rgba(255,255,255,.35);
  font-size: .88rem;
  line-height: 1.7;
  margin-top: 14px;
  max-width: 280px;
}
.footer-col h4 {
  color: rgba(255,255,255,.7);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 18px;
  font-weight: 600;
}
.footer-col a {
  display: block;
  font-size: .88rem;
  color: rgba(255,255,255,.4);
  padding: 5px 0;
  transition: color var(--transition);
}
.footer-col a:hover { color: rgba(255,255,255,.8); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 28px;
  font-size: .8rem;
}
.footer-bottom-links {
  display: flex;
  gap: 24px;
}
.footer-bottom-links a:hover { color: rgba(255,255,255,.7); }

@media (max-width: 768px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-brand { grid-column: span 2; }
  .footer-bottom { flex-direction: column; gap: 12px; }
}

/* ---- legal pages ---- */
.legal-page {
  padding: 140px 24px 80px;
}
.legal-inner {
  max-width: 720px;
  margin: 0 auto;
}
.legal-inner h1 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  margin-bottom: 8px;
}
.legal-updated {
  font-size: .85rem;
  color: var(--ink-lighter);
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}
.legal-inner h2 {
  font-size: 1.2rem;
  margin-top: 40px;
  margin-bottom: 14px;
}
.legal-inner p {
  margin-bottom: 16px;
  font-size: .94rem;
  line-height: 1.75;
}
.legal-inner ul {
  margin-bottom: 16px;
  padding-left: 20px;
}
.legal-inner li {
  list-style: disc;
  font-size: .94rem;
  line-height: 1.75;
  color: var(--ink-light);
  margin-bottom: 6px;
}
.legal-inner a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.legal-inner a:hover { color: var(--accent-hover); }

/* ---- cookie banner ---- */
.cookie-banner {
  position: fixed;
  bottom: 24px;
  left: 24px;
  right: 24px;
  max-width: 480px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: 0 8px 30px rgba(0,0,0,.1);
  z-index: 200;
  display: none;
}
.cookie-banner.show { display: block; }
.cookie-banner p {
  font-size: .84rem;
  line-height: 1.6;
  margin-bottom: 14px;
}
.cookie-banner p a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.cookie-actions {
  display: flex;
  gap: 10px;
}
.cookie-actions .btn {
  padding: 8px 18px;
  font-size: .82rem;
}

/* ---- animations ---- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .5s ease, transform .5s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- utilities ---- */
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }