/* Stash — landing page */
/* Dark, glassy, terminal-accented. Sky/violet/emerald accents per brand. */

:root {
  --bg: #09090b;
  --bg-soft: #0e0e12;
  --text: #fafafa;
  --text-body: #d4d4d8;
  --text-meta: #a1a1aa;
  --text-faint: #52525b;
  --line: rgba(255, 255, 255, 0.1);
  --glass: rgba(255, 255, 255, 0.04);
  --sky: #38bdf8;
  --violet: #a78bfa;
  --emerald: #34d399;
  --mono: "SFMono-Regular", ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Ambient glows */
.glow {
  position: fixed;
  z-index: 0;
  width: 60vmax;
  height: 60vmax;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
  pointer-events: none;
}
.glow-a {
  background: radial-gradient(circle, rgba(56, 189, 248, 0.22), transparent 60%);
  top: -20vmax;
  left: -15vmax;
}
.glow-b {
  background: radial-gradient(circle, rgba(167, 139, 250, 0.2), transparent 60%);
  bottom: -25vmax;
  right: -15vmax;
}

.container {
  width: min(1080px, 90vw);
  margin: 0 auto;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem max(1.25rem, calc((100vw - 1080px) / 2));
  background: rgba(9, 9, 11, 0.72);
  backdrop-filter: blur(20px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: -0.125em;
  color: var(--sky);
}
.brand-mark svg {
  display: block;
}
.nav-links {
  display: flex;
  gap: 1.4rem;
}
.nav-links a {
  color: var(--text-body);
  text-decoration: none;
  font-size: 0.92rem;
  transition: color 0.15s ease;
}
.nav-links a:hover {
  color: var(--text);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition:
    transform 0.15s ease,
    background 0.15s ease,
    border-color 0.15s ease;
}
.btn:active {
  transform: translateY(1px);
}
.btn-primary {
  background: linear-gradient(135deg, var(--sky), var(--violet));
  color: #06121a;
}
.btn-primary:hover {
  filter: brightness(1.08);
}
.btn-ghost {
  border: 1px solid var(--line);
  background: var(--glass);
  color: var(--text);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  z-index: 1;
  padding: clamp(3.5rem, 9vw, 7rem) 1.25rem 2rem;
  text-align: center;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--text-meta);
  margin: 0 0 1.2rem;
}
.hero h1 {
  font-size: clamp(2.4rem, 6.5vw, 4.3rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
  margin: 0 0 1.4rem;
  font-weight: 800;
}
.accent {
  background: linear-gradient(120deg, var(--sky), var(--violet), var(--emerald));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lede {
  max-width: 640px;
  margin: 0 auto 2rem;
  color: var(--text-body);
  font-size: 1.08rem;
}
.hero-cta {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

/* ---------- Terminal ---------- */
.terminal {
  text-align: left;
  max-width: 720px;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(12, 12, 16, 0.85);
  box-shadow:
    0 24px 60px -24px rgba(0, 0, 0, 0.7),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
  overflow: hidden;
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.6rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--line);
}
.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-faint);
  opacity: 0.7;
}
.dot:nth-child(1) {
  background: #f87171;
}
.dot:nth-child(2) {
  background: #fbbf24;
}
.dot:nth-child(3) {
  background: #34d399;
}
.terminal-title {
  margin-left: 0.6rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-meta);
}
.terminal pre {
  margin: 0;
  padding: 1.2rem 1.4rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text-body);
}
.c {
  color: var(--text-faint);
}
.ok {
  color: var(--emerald);
}
.dim {
  color: var(--text-meta);
}

/* ---------- Sections ---------- */
section {
  position: relative;
  z-index: 1;
  padding: clamp(3rem, 8vw, 6rem) 1.25rem;
}
section h2 {
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  letter-spacing: -0.03em;
  margin: 0 0 1rem;
}
.problem .container,
.stack .container {
  max-width: 720px;
}
.problem p,
.stack p {
  color: var(--text-body);
  font-size: 1.06rem;
}

/* ---------- Features / Why grids ---------- */
.features .grid,
.why .grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.1rem;
  margin-top: 2rem;
}
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(20px) saturate(140%);
  padding: 1.4rem 1.4rem 1.5rem;
  transition:
    transform 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease;
}
.card:hover {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.2);
}
.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.12rem;
  letter-spacing: -0.02em;
}
.card p {
  margin: 0;
  color: var(--text-body);
  font-size: 0.96rem;
}
.card code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 4px;
  padding: 0.1em 0.35em;
  color: var(--sky);
}

/* ---------- Interest graph visual ---------- */
.graph-visual {
  text-align: center;
}
.graph-visual h2 {
  text-align: left;
}
.graph-figure {
  margin: 2rem 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(180deg, rgba(56, 189, 248, 0.04), rgba(9, 9, 11, 0.4));
  box-shadow: 0 30px 70px -30px rgba(0, 0, 0, 0.8);
}
.sample-graph {
  display: block;
  width: 100%;
  height: auto;
}
.sample-graph .edges line {
  stroke: #8b8b9a;
  stroke-opacity: 0.35;
  stroke-width: 1.5;
}
.sample-graph .node {
  stroke: rgba(255, 255, 255, 0.25);
  stroke-width: 1.5;
}
.sample-graph .hub {
  stroke: rgba(255, 255, 255, 0.3);
  stroke-width: 1.5;
}
.sample-graph .hub-glow {
  transform-origin: 380px 200px;
  animation: hubpulse 4s ease-in-out infinite;
}
@keyframes hubpulse {
  0%,
  100% {
    opacity: 0.5;
  }
  50% {
    opacity: 1;
  }
}
.graph-figure figcaption {
  padding: 0.8rem 1.2rem;
  font-size: 0.85rem;
  color: var(--text-meta);
  border-top: 1px solid var(--line);
}

/* ---------- Chips ---------- */
.chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 0;
  margin: 1.6rem 0 0;
}
.chips li {
  font-family: var(--mono);
  font-size: 0.82rem;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--glass);
  color: var(--text-body);
}

/* ---------- Install ---------- */
.install {
  text-align: center;
}
.install .terminal {
  margin: 2rem auto;
  text-align: left;
}
.install-cta {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Footer ---------- */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line);
  padding: 2.5rem 1.25rem;
  text-align: center;
}
.footer p {
  margin: 0.3rem 0;
}
.foot-note {
  color: var(--text-meta);
  font-size: 0.88rem;
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 0.55s ease,
    transform 0.55s ease;
}
.reveal.in {
  opacity: 1;
  transform: none;
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .card,
  .btn,
  .sample-graph .hub-glow {
    transition: none;
    animation: none;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .nav-links {
    display: none;
  }
  .hero-cta,
  .install-cta {
    flex-direction: column;
    align-items: stretch;
  }
  .btn {
    text-align: center;
  }
  .terminal pre {
    font-size: 0.78rem;
    padding: 1rem;
  }
}