/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --ocean-50: #f0f9ff;
  --ocean-100: #e0f2fe;
  --ocean-200: #bae6fd;
  --ocean-300: #7dd3fc;
  --ocean-400: #38bdf8;
  --ocean-500: #0ea5e9;
  --ocean-600: #0284c7;
  --ocean-700: #0369a1;
  --ocean-800: #075985;
  --ocean-900: #0c4a6e;
  --ocean-950: #082f49;

  --ink-50: #f8fafc;
  --ink-100: #f1f5f9;
  --ink-200: #e2e8f0;
  --ink-300: #cbd5e1;
  --ink-400: #94a3b8;
  --ink-500: #64748b;
  --ink-600: #475569;
  --ink-700: #334155;
  --ink-800: #1e293b;
  --ink-900: #0f172a;

  --max-w: 1140px;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--ink-800);
  background: #f8fbfd;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

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

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
  font-family: inherit;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--ocean-500), var(--ocean-700));
  color: #fff;
  box-shadow: 0 4px 14px rgba(14, 165, 233, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(14, 165, 233, 0.45);
}

.btn-outline {
  background: transparent;
  color: var(--ocean-700);
  border: 2px solid var(--ocean-300);
}
.btn-outline:hover {
  background: var(--ocean-50);
  border-color: var(--ocean-500);
}

.btn-ghost {
  background: rgba(255,255,255,0.12);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.25);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.2);
}

.btn-block { width: 100%; display: block; }

/* ===== Nav ===== */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--ink-100);
  transition: box-shadow 0.3s ease;
}
#nav.scrolled { box-shadow: var(--shadow-sm); }

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--ink-900);
}
.logo-accent { color: var(--ocean-500); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  font-weight: 500;
  color: var(--ink-600);
  font-size: 0.92rem;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--ocean-600); }

.nav-cta {
  background: var(--ocean-500);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: background 0.2s, transform 0.2s;
}
.nav-cta:hover { background: var(--ocean-600); transform: translateY(-1px); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 24px; height: 2px;
  background: var(--ink-700);
  border-radius: 2px;
  transition: 0.3s;
}

/* ===== Hero ===== */
#hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 100px 24px 80px;
  overflow: hidden;
  background:
    linear-gradient(135deg, var(--ocean-950) 0%, var(--ocean-800) 35%, var(--ocean-600) 70%, var(--ocean-400) 100%);
}

#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(14,165,233,0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 80%, rgba(56,189,248,0.12) 0%, transparent 50%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100' viewBox='0 0 100 100'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M50 10c-5 10-15 20-15 30s10 15 15 15 15-5 15-15-10-20-15-30z'/%3E%3C/g%3E%3C/svg%3E");
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom, rgba(8,47,73,0.3) 0%, rgba(8,47,73,0.5) 70%, rgba(8,47,73,0.4) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ocean-100);
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

#hero h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.12;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--ocean-100);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-wave {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  z-index: 1;
  line-height: 0;
}
.hero-wave svg {
  width: 100%;
  height: 80px;
}

/* ===== Section Heads ===== */
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ocean-600);
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--ink-900);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-head p {
  font-size: 1.1rem;
  color: var(--ink-500);
  line-height: 1.65;
}

/* ===== Features ===== */
#features {
  padding: 96px 0;
  background: #f8fbfd;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--ink-100);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--ocean-400), var(--ocean-600));
  opacity: 0;
  transition: opacity 0.25s;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--ocean-200);
}
.feature-card:hover::before { opacity: 1; }

.feature-icon {
  font-size: 2.25rem;
  margin-bottom: 16px;
  display: block;
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 10px;
}

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

/* ===== How It Works ===== */
#how {
  padding: 96px 0;
  background:
    linear-gradient(180deg, #f8fbfd 0%, var(--ocean-50) 100%);
}

.how-intro {
  font-size: 1.15rem;
  color: var(--ink-600);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
  text-align: center;
  font-style: italic;
  border-left: 3px solid var(--ocean-400);
  padding-left: 20px;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
  text-align: left;
}

.arch-flow {
  max-width: 720px;
  margin: 56px auto 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.arch-step {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: #fff;
  border: 1px solid var(--ink-100);
  border-radius: var(--radius);
  padding: 28px 32px;
  width: 100%;
  max-width: 580px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.25s, transform 0.25s;
}

.arch-step:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}

.arch-highlight {
  border-color: var(--ocean-300);
  background: linear-gradient(135deg, #fff 0%, var(--ocean-50) 100%);
}

.arch-num {
  flex-shrink: 0;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--ocean-500), var(--ocean-700));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.arch-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 6px;
}

.arch-body p {
  font-size: 0.95rem;
  color: var(--ink-500);
  line-height: 1.6;
}

.arch-connector {
  padding: 12px 0;
}

.arch-note {
  max-width: 580px;
  margin: 32px auto 0;
  padding: 20px 24px;
  background: var(--ocean-50);
  border: 1px solid var(--ocean-200);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.arch-note-label {
  flex-shrink: 0;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ocean-700);
  padding: 3px 10px;
  background: var(--ocean-100);
  border-radius: 6px;
}

.arch-note p {
  font-size: 0.9rem;
  color: var(--ink-600);
  line-height: 1.55;
}

/* ===== Pricing ===== */
#pricing {
  padding: 96px 0;
  background: #fff;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  max-width: 960px;
  margin: 0 auto;
}

.price-card {
  background: #fff;
  border: 1px solid var(--ink-200);
  border-radius: var(--radius);
  padding: 36px 32px;
  text-align: center;
  position: relative;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}

.price-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.price-featured {
  border-color: var(--ocean-400);
  border-width: 2px;
  box-shadow: 0 8px 30px rgba(14, 165, 233, 0.12);
  transform: scale(1.03);
}
.price-featured:hover {
  transform: scale(1.03) translateY(-4px);
}

.price-badge {
  position: absolute;
  top: -14px; left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--ocean-500), var(--ocean-700));
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 100px;
  letter-spacing: 0.04em;
}

.price-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink-700);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.price-amount {
  font-size: 3rem;
  font-weight: 800;
  color: var(--ink-900);
  margin-bottom: 4px;
}
.price-period {
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink-400);
}

.price-desc {
  font-size: 0.92rem;
  color: var(--ink-500);
  margin-bottom: 24px;
  min-height: 40px;
}

.price-features {
  text-align: left;
  margin-bottom: 28px;
}
.price-features li {
  font-size: 0.92rem;
  color: var(--ink-600);
  padding: 6px 0;
  border-bottom: 1px solid var(--ink-100);
}
.price-features li:last-child { border-bottom: none; }

/* ===== Beta ===== */
#beta {
  padding: 96px 0;
  background: linear-gradient(180deg, #fff 0%, var(--ocean-50) 100%);
}

.beta-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  max-width: 960px;
  margin: 0 auto;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.beta-left {
  padding: 48px 40px;
  background: linear-gradient(135deg, var(--ocean-800) 0%, var(--ocean-950) 100%);
  color: #fff;
}

.beta-left .section-label {
  color: var(--ocean-300);
}

.beta-left h2 {
  font-size: 1.85rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.25;
}

.beta-left p {
  color: var(--ocean-100);
  margin-bottom: 24px;
  font-size: 1rem;
}

.beta-bullets {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.beta-bullets li {
  font-size: 0.95rem;
  color: var(--ocean-100);
}

.beta-right {
  padding: 48px 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-700);
  margin-bottom: 6px;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--ink-200);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  background: #fff;
  color: var(--ink-800);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--ocean-400);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.12);
}

.form-note {
  font-size: 0.82rem;
  color: var(--ink-400);
  margin-top: 12px;
  text-align: center;
}

.form-success {
  margin-top: 16px;
  padding: 14px;
  background: #ecfdf5;
  border: 1px solid #6ee7b7;
  border-radius: var(--radius-sm);
  color: #065f46;
  font-weight: 600;
  font-size: 0.92rem;
  text-align: center;
}

.form-error {
  margin-top: 16px;
  padding: 14px;
  background: #fef2f2;
  border: 1px solid #fca5a5;
  border-radius: var(--radius-sm);
  color: #991b1b;
  font-weight: 600;
  font-size: 0.92rem;
  text-align: center;
}

/* ===== Footer ===== */
footer {
  background: var(--ink-900);
  color: var(--ink-300);
  padding: 64px 0 32px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 12px;
}

.footer-tag {
  font-size: 0.88rem;
  color: var(--ink-400);
  font-style: italic;
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.footer-links h4 {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-200);
  margin-bottom: 14px;
}

.footer-links a {
  display: block;
  font-size: 0.9rem;
  color: var(--ink-400);
  padding: 4px 0;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--ocean-400); }

.footer-bottom {
  grid-column: 1 / -1;
  border-top: 1px solid var(--ink-800);
  padding-top: 24px;
  margin-top: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--ink-500);
}

.footer-built {
  font-size: 0.82rem !important;
  color: var(--ink-600);
}

/* ===== Responsive ===== */
@media (max-width: 960px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
  }

  .price-featured {
    transform: none;
  }
  .price-featured:hover {
    transform: translateY(-4px);
  }

  .beta-card {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    padding: 16px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--ink-200);
    box-shadow: var(--shadow-md);
  }

  #nav.open .nav-links {
    display: flex;
  }

  #nav.open .nav-toggle span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  #nav.open .nav-toggle span:nth-child(2) { opacity: 0; }
  #nav.open .nav-toggle span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

  .nav-toggle { display: flex; }
}

@media (max-width: 600px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }

  #hero {
    min-height: 540px;
    padding: 100px 20px 60px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .beta-left, .beta-right {
    padding: 36px 24px;
  }

  .footer-links {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .section-head {
    margin-bottom: 40px;
  }

  #features, #how, #pricing, #beta {
    padding: 64px 0;
  }
}

@media (max-width: 400px) {
  .container { padding: 0 16px; }

  .nav-inner { padding: 12px 16px; }

  .price-amount { font-size: 2.5rem; }
}

/* ===== Animations ===== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-badge { animation: fadeUp 0.6s ease 0.1s both; }
.hero-content h1 { animation: fadeUp 0.6s ease 0.2s both; }
.hero-sub { animation: fadeUp 0.6s ease 0.3s both; }
.hero-actions { animation: fadeUp 0.6s ease 0.4s both; }

.feature-card { opacity: 0; }
.feature-card.in-view { animation: fadeUp 0.5s ease both; }
.feature-card:nth-child(1).in-view { animation-delay: 0s; }
.feature-card:nth-child(2).in-view { animation-delay: 0.1s; }
.feature-card:nth-child(3).in-view { animation-delay: 0.2s; }
.feature-card:nth-child(4).in-view { animation-delay: 0.3s; }

.price-card { opacity: 0; }
.price-card.in-view { animation: fadeUp 0.5s ease both; }
.price-card:nth-child(1).in-view { animation-delay: 0s; }
.price-card:nth-child(2).in-view { animation-delay: 0.1s; }
.price-card:nth-child(3).in-view { animation-delay: 0.2s; }

.arch-step { opacity: 0; }
.arch-step.in-view { animation: fadeUp 0.5s ease both; }
.arch-step:nth-of-type(1).in-view { animation-delay: 0s; }
.arch-step:nth-of-type(2).in-view { animation-delay: 0.15s; }
.arch-step:nth-of-type(3).in-view { animation-delay: 0.3s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}