/* AgentStream — landing page
   Design goals: <100KB total page, no web fonts, mobile-responsive, dark+light.
   Visual identity: terminal-esque, magenta/cyan accents, system fonts.
*/

/* ── Reset + base ──────────────────────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; height: auto; }
code, pre, kbd { font-family: "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, monospace; font-size: 0.92em; }
code { background: var(--code-bg); padding: 1px 6px; border-radius: 4px; }
kbd {
  background: var(--code-bg); padding: 1px 6px; border-radius: 4px;
  border: 1px solid var(--border); font-size: 0.85em;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.2; letter-spacing: -0.01em; margin: 0 0 0.6em; }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 600; }
h3 { font-size: 1.2rem; font-weight: 600; }
p { margin: 0 0 1em; }
ul, ol { padding-left: 1.5em; margin: 0 0 1em; }
em { font-style: italic; color: var(--fg-mid); }
strong { font-weight: 600; }

/* ── Theme tokens ──────────────────────────────────────────────────────── */

:root {
  --bg: #0a0a0c;
  --bg-2: #131318;
  --bg-3: #1c1c24;
  --fg: #e9e9ed;
  --fg-mid: #a0a0a8;
  --fg-dim: #6e6e78;
  --border: #2a2a32;
  --code-bg: rgba(255, 255, 255, 0.06);
  --accent: #c084fc;          /* magenta / cyber accent */
  --accent-2: #67e8f9;        /* cyan secondary */
  --accent-text: #0a0a0c;     /* text on accent button */
  --success: #4ade80;
  --warn: #fbbf24;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #fafafa;
    --bg-2: #ffffff;
    --bg-3: #f3f4f6;
    --fg: #18181b;
    --fg-mid: #52525b;
    --fg-dim: #a1a1aa;
    --border: #e4e4e7;
    --code-bg: rgba(0, 0, 0, 0.05);
    --accent: #9333ea;
    --accent-2: #0891b2;
    --accent-text: #ffffff;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    color-scheme: light;
  }
}

:root[data-theme="light"] {
  --bg: #fafafa;
  --bg-2: #ffffff;
  --bg-3: #f3f4f6;
  --fg: #18181b;
  --fg-mid: #52525b;
  --fg-dim: #a1a1aa;
  --border: #e4e4e7;
  --code-bg: rgba(0, 0, 0, 0.05);
  --accent: #9333ea;
  --accent-2: #0891b2;
  --accent-text: #ffffff;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
  color-scheme: light;
}

/* ── Live ticker ──────────────────────────────────────────────────────── */

.ticker {
  background: linear-gradient(90deg, var(--bg-3), var(--bg-2));
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--fg-mid);
  overflow: hidden;
}
.ticker-inner {
  max-width: 1200px; margin: 0 auto; padding: 0.5rem 1.5rem;
  display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap;
}
.ticker .dot {
  display: inline-block; width: 8px; height: 8px;
  background: var(--success); border-radius: 50%;
  animation: pulse 2.5s ease-in-out infinite;
  box-shadow: 0 0 8px var(--success);
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.9); }
}
.sep { color: var(--fg-dim); }

/* ── Nav ──────────────────────────────────────────────────────────────── */

.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 10, 12, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
:root[data-theme="light"] .nav,
:root:not([data-theme="dark"]) .nav { background: rgba(250, 250, 250, 0.85); }
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .nav { background: rgba(250, 250, 250, 0.85); }
}

.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0.75rem 1.5rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.brand {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-weight: 700; font-size: 1.05rem; color: var(--fg);
  text-decoration: none;
}
.brand-mark {
  display: inline-grid; place-items: center;
  width: 28px; height: 28px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--accent-text);
  border-radius: 6px; font-weight: 900;
}
.nav-links { display: flex; gap: 1.5rem; align-items: center; }
.nav-links a { color: var(--fg-mid); font-size: 0.95rem; }
.nav-links a:hover { color: var(--fg); text-decoration: none; }
.nav-cross { color: var(--accent) !important; }
.theme-toggle {
  background: transparent; border: 1px solid var(--border); color: var(--fg-mid);
  width: 36px; height: 36px; border-radius: 50%; cursor: pointer;
  display: grid; place-items: center; font-size: 1.05rem;
}
.theme-toggle:hover { color: var(--fg); border-color: var(--accent); }

@media (max-width: 640px) {
  .nav-links { display: none; }
}

/* ── Hero ─────────────────────────────────────────────────────────────── */

.hero {
  max-width: 1200px; margin: 0 auto;
  padding: 4rem 1.5rem 3rem;
}
.hero-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 3rem; align-items: center;
}
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2rem; }
  .hero { padding: 2rem 1.5rem; }
}

.hero-content h1 {
  background: linear-gradient(135deg, var(--fg) 60%, var(--accent));
  background-clip: text; -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.lede { font-size: 1.15rem; color: var(--fg-mid); margin-bottom: 2rem; }

.install-block { margin: 1.5rem 0 1.5rem; }
.install-btn {
  display: inline-flex; flex-direction: column; align-items: stretch;
  padding: 1rem 1.5rem;
  background: var(--bg-3);
  border: 1px solid var(--accent);
  border-radius: 12px;
  cursor: pointer; transition: all 0.15s ease;
  width: 100%; max-width: 460px;
  box-shadow: 0 0 0 3px transparent;
  font-family: inherit; color: var(--fg);
  text-align: left;
}
.install-btn:hover {
  border-color: var(--accent-2);
  box-shadow: 0 0 0 4px rgba(192, 132, 252, 0.15);
}
.install-cmd {
  font-size: 1.15rem; font-weight: 600;
  color: var(--accent-2);
  background: transparent;
  padding: 0;
  display: block;
}
.install-hint {
  display: block; font-size: 0.85rem; color: var(--fg-dim);
  margin-top: 0.4rem;
}
.install-btn.copied .install-hint { color: var(--success); }
.install-sub { font-size: 0.9rem; color: var(--fg-mid); margin-top: 0.75rem; margin-bottom: 0; }

.mobile-only { display: none; }
@media (max-width: 640px) {
  .mobile-only { display: block; color: var(--warn); margin-top: 0.5rem; }
}

.hero-meta {
  font-size: 0.9rem; color: var(--fg-dim);
  display: flex; gap: 0.75rem; align-items: center; flex-wrap: wrap;
  margin-top: 1.5rem;
}
.hero-meta a { color: var(--fg-mid); }

/* ── Hero demo (terminal mockup) ──────────────────────────────────────── */

.hero-demo {
  background: var(--bg-2);
  border-radius: 14px;
  box-shadow: var(--shadow);
  overflow: hidden;
  border: 1px solid var(--border);
}
.terminal-bar {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.7rem 1rem;
  background: var(--bg-3);
  border-bottom: 1px solid var(--border);
}
.term-dot {
  width: 12px; height: 12px; border-radius: 50%;
  display: inline-block;
}
.term-dot.red    { background: #ff5f57; }
.term-dot.yellow { background: #febc2e; }
.term-dot.green  { background: #28c840; }
.term-title { margin-left: 0.5rem; color: var(--fg-dim); font-size: 0.85rem; font-family: monospace; }

.terminal-body {
  padding: 1.25rem 1rem 0;
  font-family: monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  min-height: 240px;
  position: relative;
}
.terminal-line { margin-bottom: 0.4rem; color: var(--fg); }
.terminal-line.dim { color: var(--fg-dim); }
.prompt { color: var(--accent-2); margin-right: 0.5rem; }
.cmd-input { color: var(--fg); }
.terminal-spacer { height: 1rem; }
.terminal-statusline {
  position: relative;
  background: var(--bg-3);
  border-top: 1px solid var(--border);
  margin: 0 -1rem;
  padding: 0.75rem 1rem;
  font-size: 0.8rem;
  display: flex; align-items: center; gap: 0.6rem;
  white-space: nowrap; overflow: hidden;
}
.sl-model { color: var(--accent-2); }
.sl-ctx, .sl-cost { color: var(--fg-mid); }
.sl-num { color: var(--warn); }
.sl-sep { color: var(--fg-dim); }
.sl-marquee {
  flex: 1; overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, black 5%, black 95%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, black 5%, black 95%, transparent);
}
.marquee-track {
  display: inline-block; white-space: nowrap;
  animation: marquee-scroll 40s linear infinite;
  color: var(--fg);
}
@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none; }
}
.marquee-icon { color: var(--fg-mid); margin-right: 0.4rem; }
.marquee-dot { color: var(--fg-dim); margin: 0 0.6rem; }
.marquee-item { color: var(--fg); }

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

.demo-caption { font-size: 0.85rem; color: var(--fg-dim); margin-top: 0.75rem; text-align: center; }

/* ── Sections ─────────────────────────────────────────────────────────── */

.section {
  max-width: 1200px; margin: 0 auto;
  padding: 4rem 1.5rem;
  border-top: 1px solid var(--border);
}
.section h2 { margin-bottom: 1rem; }
.section-sub { color: var(--fg-mid); margin-bottom: 2rem; }

/* ── How it works ─────────────────────────────────────────────────────── */

.how-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr); gap: 1.5rem;
}
@media (max-width: 800px) { .how-grid { grid-template-columns: 1fr; } }
.how-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}
.how-num {
  display: inline-grid; place-items: center;
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--accent-text);
  border-radius: 8px;
  font-weight: 700; margin-bottom: 1rem;
}
.how-code {
  display: block; background: var(--code-bg);
  padding: 0.5rem 0.75rem; border-radius: 6px;
  font-size: 0.9rem; color: var(--accent-2);
  margin-top: 0.75rem;
}
.how-chat { list-style: none; padding-left: 0; margin-top: 0.5rem; }
.how-chat li { color: var(--fg-mid); margin-bottom: 0.2rem; }

/* ── Features ─────────────────────────────────────────────────────────── */

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr); gap: 1.5rem;
}
@media (max-width: 900px) { .features-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .features-grid { grid-template-columns: 1fr; } }

.feature {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}
.feature-icon { font-size: 1.7rem; margin-bottom: 0.75rem; }
.feature h3 { margin-bottom: 0.5rem; }
.feature p { color: var(--fg-mid); font-size: 0.95rem; margin-bottom: 0; }

/* ── Pricing ──────────────────────────────────────────────────────────── */

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr; gap: 1.5rem;
  max-width: 900px; margin: 0 auto;
}
@media (max-width: 700px) { .pricing-grid { grid-template-columns: 1fr; } }

.pricing-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
}
.pricing-card--featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(192, 132, 252, 0.12);
  position: relative;
}
.pricing-card--featured::before {
  content: "Recommended";
  position: absolute; top: -12px; right: 20px;
  background: var(--accent); color: var(--accent-text);
  padding: 3px 10px; border-radius: 999px; font-size: 0.72rem;
  font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase;
}
.pricing-tier { color: var(--fg-mid); font-size: 0.95rem; }
.pricing-price { font-size: 3rem; font-weight: 800; line-height: 1; margin: 0.3rem 0; }
.pricing-period { color: var(--fg-dim); font-size: 0.9rem; margin-bottom: 1.5rem; }
.pricing-list { list-style: none; padding: 0; margin: 0 0 1.5rem; }
.pricing-list li { padding: 0.35rem 0; color: var(--fg); font-size: 0.95rem; }
.pricing-divider { color: var(--fg-mid) !important; font-size: 0.85rem !important; margin-top: 0.75rem; padding-top: 0.75rem !important; border-top: 1px solid var(--border); }
.pricing-btn {
  display: inline-block; width: 100%; text-align: center;
  background: var(--accent); color: var(--accent-text);
  padding: 0.75rem 1.5rem; border-radius: 10px;
  font-weight: 600; text-decoration: none;
}
.pricing-btn:hover { opacity: 0.92; text-decoration: none; }
.pricing-fine { color: var(--fg-mid); font-size: 0.85rem; margin-top: 1rem; margin-bottom: 0; }

/* ── Screenshot / mockup section ──────────────────────────────────────── */

.screenshot-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  font-family: monospace;
}
.screenshot-line {
  background: var(--bg-3);
  padding: 0.85rem 1rem;
  border-radius: 8px;
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  overflow-x: auto;
  white-space: pre;
  color: var(--fg);
  border: 1px solid var(--border);
}
.ss-model { color: var(--accent-2); }
.ss-num { color: var(--warn); }
.ss-icon { color: var(--fg-mid); }
.ss-music { color: var(--accent); }
.ss-tag { color: var(--fg-dim); }
.screenshot-caption { color: var(--fg-dim); font-size: 0.85rem; margin: 0 0 1.25rem; font-family: -apple-system, sans-serif; }

/* ── Privacy ──────────────────────────────────────────────────────────── */

.privacy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr; gap: 1.5rem;
}
@media (max-width: 700px) { .privacy-grid { grid-template-columns: 1fr; } }
.privacy-item {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}
.privacy-item h3 { margin-bottom: 0.5rem; }
.privacy-item p { color: var(--fg-mid); font-size: 0.95rem; margin-bottom: 0; }

/* ── FAQ ──────────────────────────────────────────────────────────────── */

.faq-grid {
  display: grid; gap: 0.75rem;
  max-width: 800px; margin: 0 auto;
}
.faq-item {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
}
.faq-item summary {
  cursor: pointer; font-weight: 600;
  list-style: none;
  display: flex; justify-content: space-between; align-items: center;
  color: var(--fg);
}
.faq-item summary::after {
  content: "+"; color: var(--accent);
  font-size: 1.3rem; font-weight: 400;
  transition: transform 0.15s ease;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item[open] { background: var(--bg-3); }
.faq-item p, .faq-item ul { color: var(--fg-mid); font-size: 0.95rem; margin-top: 0.75rem; }
.faq-item ul li { margin-bottom: 0.2rem; }

/* ── Footer ───────────────────────────────────────────────────────────── */

.footer {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  margin-top: 4rem;
}
.footer-inner {
  max-width: 1200px; margin: 0 auto;
  padding: 3rem 1.5rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr); gap: 2rem;
}
@media (max-width: 800px) { .footer-inner { grid-template-columns: 1fr 1fr; } }
@media (max-width: 500px) { .footer-inner { grid-template-columns: 1fr; } }
.footer-col h4 { margin-bottom: 0.75rem; font-size: 0.85rem; color: var(--fg-dim); text-transform: uppercase; letter-spacing: 0.05em; }
.footer-col a {
  display: block;
  color: var(--fg-mid); font-size: 0.95rem;
  margin-bottom: 0.4rem; text-decoration: none;
}
.footer-col a:hover { color: var(--fg); }
.footer-base {
  max-width: 1200px; margin: 0 auto;
  padding: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--fg-dim); font-size: 0.85rem;
  display: flex; gap: 0.5rem; flex-wrap: wrap;
}
.footer-base a { color: var(--fg-mid); }