/* ============================================================
   AI-Linker — design tokens
   Dark terminal aesthetic. System fonts only, no webfonts.
   ============================================================ */

:root {
  /* color */
  --bg:            #08090a;
  --bg-raised:     #101316;
  --bg-inset:      #0c0e10;
  --border:        #20262b;
  --border-strong: #2e363d;
  --text:          #e6e9ea;
  --text-dim:      #8a9299;
  --text-faint:    #565e64;
  --accent:        #7fe0c9;
  --accent-bright: #b3ffe9;
  --accent-dim:    #3d6b60;
  --amber:         #e8b458;
  --danger:        #e8735a;

  /* type */
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Cascadia Mono", "Fira Code", Consolas, "Liberation Mono", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, Roboto, "Helvetica Neue", Arial, sans-serif;

  /* layout */
  --maxw: 1080px;
  --radius: 6px;
}

* { box-sizing: border-box; }

html { color-scheme: dark; scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 900px 500px at 50% -10%, rgba(127,224,201,0.07), transparent 60%);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-bright); }
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

code, .mono { font-family: var(--font-mono); }

h1, h2, h3 { font-family: var(--font-mono); font-weight: 600; letter-spacing: -0.01em; margin: 0 0 0.5em; }
h1 { font-size: clamp(2rem, 4.5vw, 3.1rem); line-height: 1.15; }
h2 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; color: var(--text-dim); }

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

/* --- nav --- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(8,9,10,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { font-family: var(--font-mono); font-weight: 600; font-size: 1rem; color: var(--text); display: flex; align-items: center; gap: 8px; }
.brand::before { content: "›_"; color: var(--accent); }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--text-dim); font-family: var(--font-mono); font-size: 0.88rem; }
.nav-links a:hover { color: var(--text); }
.nav-links a.cta {
  color: var(--bg); background: var(--accent); padding: 7px 14px; border-radius: var(--radius);
}
.nav-links a.cta:hover { background: var(--accent-bright); }

/* --- buttons --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.92rem; font-weight: 500;
  padding: 11px 20px; border-radius: var(--radius); border: 1px solid var(--border-strong);
  background: var(--bg-raised); color: var(--text); cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.1s ease;
}
.btn:hover { border-color: var(--accent-dim); background: var(--bg-inset); color: var(--text); }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #06110d; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-bright); border-color: var(--accent-bright); color: #06110d; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* --- section --- */
.section { padding: 88px 0; border-bottom: 1px solid var(--border); }
.section:last-of-type { border-bottom: none; }
.eyebrow {
  font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 12px; display: block;
}
.section-head { max-width: 620px; margin-bottom: 48px; }

/* --- terminal window --- */
.term {
  background: var(--bg-inset); border: 1px solid var(--border); border-radius: 8px;
  overflow: hidden; box-shadow: 0 30px 80px -30px rgba(0,0,0,0.7);
}
.term-bar { display: flex; align-items: center; gap: 6px; padding: 10px 14px; border-bottom: 1px solid var(--border); }
.term-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--border-strong); }
.term-title { margin-left: 10px; font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-faint); }
.term-body { padding: 22px 20px; font-family: var(--font-mono); font-size: 0.9rem; line-height: 1.75; min-height: 220px; }
.term-line { white-space: pre-wrap; }
.term-prompt { color: var(--accent); }
.term-ok { color: var(--accent); }
.term-dim { color: var(--text-faint); }
.term-cursor { display: inline-block; width: 7px; height: 1.1em; background: var(--accent); vertical-align: text-bottom; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* --- provider badges --- */
.badges { display: flex; flex-wrap: wrap; gap: 10px; }
.badge {
  font-family: var(--font-mono); font-size: 0.82rem; color: var(--text-dim);
  border: 1px solid var(--border); background: var(--bg-raised);
  padding: 7px 12px; border-radius: 999px;
}
.badge::before { content: "●"; color: var(--accent); margin-right: 7px; font-size: 0.6em; vertical-align: middle; }

/* --- grid features --- */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--bg-raised); border: 1px solid var(--border); border-radius: 8px; padding: 24px;
}
.card h3 { color: var(--text); margin-bottom: 8px; }
.card p { margin: 0; font-size: 0.92rem; }
.card .num { font-family: var(--font-mono); color: var(--text-faint); font-size: 0.8rem; display: block; margin-bottom: 10px; }

/* --- pricing --- */
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
.plan {
  background: var(--bg-raised); border: 1px solid var(--border); border-radius: 10px;
  padding: 28px 24px; display: flex; flex-direction: column;
  position: relative;
}
.plan.featured { border-color: var(--accent-dim); box-shadow: 0 0 0 1px var(--accent-dim), 0 24px 60px -30px rgba(127,224,201,0.25); }
.plan-tag {
  position: absolute; top: -12px; right: 20px;
  background: var(--amber); color: #241a05; font-family: var(--font-mono); font-size: 0.72rem;
  padding: 3px 10px; border-radius: 999px; font-weight: 600;
}
.plan-name { font-family: var(--font-mono); color: var(--text-dim); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; }
.plan-price { font-family: var(--font-mono); font-size: 2.3rem; color: var(--text); margin: 10px 0 2px; }
.plan-price span { font-size: 0.95rem; color: var(--text-faint); font-weight: 400; }
.plan-sub { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-faint); margin-bottom: 20px; }
.plan-features { list-style: none; margin: 0 0 24px; padding: 0; font-size: 0.88rem; color: var(--text-dim); flex: 1; }
.plan-features li { padding: 6px 0; border-top: 1px solid var(--border); }
.plan-features li:first-child { border-top: none; }
.plan-features li::before { content: "+"; color: var(--accent); margin-right: 8px; font-family: var(--font-mono); }
.pay-methods { display: flex; flex-direction: column; gap: 8px; }

/* --- footer --- */
.footer { padding: 40px 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.footer-links { display: flex; gap: 20px; }
.footer-links a, .footer p { font-size: 0.85rem; color: var(--text-faint); }
.footer p { margin: 0; }

/* --- misc --- */
.hero { padding: 96px 0 80px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.tag-line { color: var(--text-dim); font-size: 1.08rem; max-width: 480px; }
.hero-ctas { display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap; }
.stat-row { display: flex; gap: 32px; margin-top: 40px; }
.stat b { display: block; font-family: var(--font-mono); font-size: 1.4rem; color: var(--text); }
.stat span { font-size: 0.8rem; color: var(--text-faint); }

.platform-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.platform-card {
  background: var(--bg-raised); border: 1px solid var(--border); border-radius: 8px;
  padding: 22px 16px; text-align: center; transition: border-color 0.15s ease;
}
.platform-card:hover { border-color: var(--accent-dim); }
.platform-card .icon { font-family: var(--font-mono); font-size: 1.6rem; color: var(--accent); margin-bottom: 10px; }
.platform-card h3 { font-size: 0.95rem; margin-bottom: 4px; }
.platform-card .ver { font-family: var(--font-mono); font-size: 0.74rem; color: var(--text-faint); display: block; margin-top: 10px; }

.shot { border: 1px solid var(--border); border-radius: 8px; overflow: hidden; background: var(--bg-inset); }
.shot img { display: block; width: 100%; height: auto; }
.shot-caption { padding: 10px 14px; font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-faint); border-top: 1px solid var(--border); }

.callout {
  border: 1px solid var(--border); background: var(--bg-inset); border-radius: 8px;
  padding: 16px 18px; font-family: var(--font-mono); font-size: 0.85rem; color: var(--text-dim);
}
.callout strong { color: var(--accent); }

.legal h2 { margin-top: 2em; }
.legal { color: var(--text-dim); }
.legal p, .legal li { color: var(--text-dim); }

.pill-toggle { display: inline-flex; border: 1px solid var(--border); border-radius: 999px; padding: 3px; gap: 3px; }
.pill-toggle button {
  font-family: var(--font-mono); font-size: 0.82rem; padding: 7px 16px; border-radius: 999px; border: none;
  background: transparent; color: var(--text-faint); cursor: pointer;
}
.pill-toggle button.active { background: var(--accent); color: #06110d; }

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .grid-3, .grid-2, .plans { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .nav-links { gap: 16px; }
  .nav-links span.only-desktop { display: none; }
}