/* StockStream — Professional product landing page
   Style: minimalistic, to-the-point, interactive, product-type
   Inspired by datapages, open-research-data-template, DataPlanet
*/

:root {
  --bg: #0a0a0b;
  --bg-elevated: #141416;
  --bg-muted: #1a1a1d;
  --text: #e4e4e7;
  --text-muted: #a1a1aa;
  --accent: #22c55e;
  --accent-dim: #16a34a;
  --accent-muted: #1e9e4a;
  --border: #27272a;
  --radius: 8px;
  --font-sans: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 11, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.logo {
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  color: var(--accent);
  stroke: var(--accent);
  flex-shrink: 0;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-cta {
  color: var(--accent) !important;
  font-weight: 500;
}

/* Hero */
.hero {
  max-width: 800px;
  margin: 0 auto;
  padding: 6rem 1.5rem 5rem;
  text-align: center;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

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

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 500;
  font-family: inherit;
  border-radius: var(--radius);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border: none;
}

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

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

.btn-secondary:hover {
  border-color: var(--text-muted);
  background: var(--bg-muted);
}

/* Stats */
.hero-stats {
  display: flex;
  gap: 3rem;
  justify-content: center;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--accent);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.25rem;
}

/* Sections */
.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 1.5rem;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 600;
  margin-bottom: 2.5rem;
  text-align: center;
}

/* Features grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.feature {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s;
}

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

.feature-icon {
  margin-bottom: 1rem;
  color: var(--accent-muted);
}
.feature-icon svg {
  display: block;
  stroke: var(--accent-muted);
}

.feature h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Architecture & Dashboard */
.arch-diagram,
.dashboard-wrap {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-muted);
  margin-bottom: 1rem;
}

.arch-diagram img,
.dashboard-wrap img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}
.arch-diagram img {
  max-height: 140px;
  object-fit: contain;
}

.arch-caption {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
}

/* Quick Start */
.quickstart-steps {
  display: grid;
  gap: 1.5rem;
}

.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.step-num {
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 50%;
}

.step pre {
  grid-column: 2;
  margin: 0;
}

.step code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: var(--bg-muted);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  display: block;
}

.step p {
  grid-column: 2;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.step a {
  color: var(--accent);
}

/* CTA */
.cta {
  text-align: center;
  padding: 5rem 1.5rem;
}

.cta p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
}

.footer p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-top: 0.75rem;
}

.footer-links a {
  color: var(--accent);
  text-decoration: none;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.feature, .step {
  animation: fadeIn 0.5s ease-out both;
}

.feature:nth-child(1) { animation-delay: 0.05s; }
.feature:nth-child(2) { animation-delay: 0.1s; }
.feature:nth-child(3) { animation-delay: 0.15s; }
.feature:nth-child(4) { animation-delay: 0.2s; }

/* Responsive */
@media (max-width: 640px) {
  .nav-links {
    gap: 1rem;
  }

  .hero-stats {
    gap: 2rem;
  }

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

  .step-num {
    justify-self: start;
  }
}