/* ===================================================================
   Electrum-LTC Agent Setup — Modern Dark Theme
   Mobile-first, fully responsive, zero dependencies
   =================================================================== */

:root {
  --bg: #0a0a0f;
  --bg-elevated: #111118;
  --bg-card: #16161f;
  --bg-code: #0d0d12;
  --border: rgba(255,255,255,0.06);
  --text: #e4e4ef;
  --text-muted: #8b8b9e;
  --text-dim: #5a5a6e;
  --accent: #00d4a0;
  --accent-soft: rgba(0,212,160,0.12);
  --accent-glow: rgba(0,212,160,0.4);
  --danger: #ff5f56;
  --warn: #ffbd2e;
  --success: #27c93f;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-sm: 8px;
  --max-width: 1120px;
  --section-pad: clamp(3rem, 8vw, 6rem);
  --container-pad: clamp(1rem, 4vw, 2rem);
}

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

html { scroll-behavior:smooth; font-size:16px; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

/* ── Typography ── */
h1,h2,h3 { font-weight:700; line-height:1.15; letter-spacing:-0.025em; }
h1 { font-size:clamp(2rem,5vw,3.4rem); }
h2 { font-size:clamp(1.5rem,3.5vw,2.2rem); }
h3 { font-size:clamp(1.1rem,2.5vw,1.35rem); font-weight:600; }
p  { font-size:clamp(0.95rem,1.5vw,1.05rem); color:var(--text-muted); }
a  { color:var(--accent); text-decoration:none; transition:opacity .2s; }
a:hover { opacity:.8; }

.accent      { color:var(--accent); }
.gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, #00f0ff 100%);
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  background-clip:text;
}

/* ── Layout ── */
.container {
  max-width:var(--max-width);
  margin:0 auto;
  padding:0 var(--container-pad);
}

/* ── Navigation ── */
.nav {
  display:flex; align-items:center; justify-content:space-between;
  padding:1rem var(--container-pad);
  max-width:var(--max-width); margin:0 auto;
  position:relative; z-index:100;
}
.logo {
  display:flex; align-items:center; gap:.6rem;
  font-weight:700; font-size:1.05rem; color:var(--text);
}
.logo svg { flex-shrink:0; }

.nav-links {
  display:flex; align-items:center; gap:2rem;
}
.nav-links a {
  color:var(--text-muted); font-size:.9rem; font-weight:500; }
.nav-links a:hover { color:var(--text); }
.btn-ghost {
  border:1px solid var(--border); padding:.4rem .9rem; border-radius:var(--radius-sm);
  font-size:.85rem; color:var(--text);
}

.menu-toggle {
  display:none; background:none; border:none;
  color:var(--text); font-size:1.5rem; cursor:pointer;
}

@media (max-width:768px){
  .nav-links {
    position:fixed; inset:0; top:60px; flex-direction:column;
    gap:0; background:rgba(10,10,15,.98); backdrop-filter:blur(20px);
    padding:2rem; transform:translateY(-150%); transition:transform .35s ease;
    align-items:flex-start;
  }
  .nav-links.open { transform:translateY(0); }
  .nav-links a { font-size:1.1rem; padding:1rem 0; border-bottom:1px solid var(--border); width:100%; }
  .menu-toggle { display:block; }
}

/* ── Hero ── */
.hero {
  position:relative; overflow:hidden;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0,212,160,.08), transparent),
    var(--bg);
  min-height:100vh; display:flex; flex-direction:column;
}
.hero::before {
  content:''; position:absolute; inset:0;
  background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2300d4a0' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity:.5; pointer-events:none;
}

.hero-content {
  flex:1; display:flex; flex-direction:column; align-items:center;
  justify-content:center; text-align:center;
  padding:var(--section-pad) var(--container-pad);
  position:relative; z-index:2;
}

.badge {
  display:inline-flex; align-items:center; gap:.4rem;
  background:var(--accent-soft); color:var(--accent);
  border:1px solid rgba(0,212,160,.2); border-radius:999px;
  padding:.4rem 1rem; font-size:.8rem; font-weight:600; margin-bottom:1.5rem;
}

.subtitle {
  font-size:clamp(1rem,2.2vw,1.25rem);
  color:var(--text-muted); margin-top:1rem; max-width:520px;
}

.hero-cta {
  display:flex; gap:1rem; margin-top:2rem; flex-wrap:wrap; justify-content:center;
}

/* ── Buttons ── */
.btn-primary, .btn-secondary, .btn-ghost {
  display:inline-flex; align-items:center; gap:.4rem;
  padding:.75rem 1.5rem; border-radius:var(--radius);
  font-weight:600; font-size:.95rem; transition:all .2s; cursor:pointer; border:none;
}
.btn-primary {
  background:var(--accent); color:#000;
  box-shadow:0 4px 20px var(--accent-glow);
}
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 6px 28px var(--accent-glow); opacity:1; }
.btn-secondary {
  background:var(--bg-card); color:var(--text); border:1px solid var(--border);
}
.btn-secondary:hover { background:var(--bg-elevated); }
.btn-lg { padding:1rem 2rem; font-size:1.05rem; }

/* ── Code Preview ── */
.code-preview {
  margin-top:3rem; width:100%; max-width:600px; text-align:left;
  background:var(--bg-code); border:1px solid var(--border);
  border-radius:var(--radius-lg); overflow:hidden;
  box-shadow:0 8px 40px rgba(0,0,0,.4);
}
.code-header, .term-header {
  display:flex; align-items:center; justify-content:space-between;
  padding:.6rem 1rem; background:rgba(255,255,255,.02); border-bottom:1px solid var(--border);
}
.code-header span, .term-header span { font-size:.75rem; color:var(--text-dim); font-family:var(--font-mono); }
.dots { display:flex; gap:.4rem; }
.dots span { width:10px; height:10px; border-radius:50%; background:var(--danger); }
.dots span:nth-child(2){ background:var(--warn); }
.dots span:nth-child(3){ background:var(--success); }

.code-preview pre {
  padding:1.2rem 1.5rem; overflow-x:auto; -webkit-overflow-scrolling:touch;
  font-family:var(--font-mono); font-size:.8rem; line-height:1.7; color:var(--text);
}
.code-preview .prompt { color:var(--accent); margin-right:.4rem; }
.code-preview .output { color:var(--text-muted); display:block; margin-left:1.2rem; }

/* ── Sections ── */
section { padding:var(--section-pad) 0; }
section h2 { text-align:center; margin-bottom:3rem; }

.features { background:var(--bg-elevated); }
.grid {
  display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:1.5rem;
}
.card {
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:2rem;
  transition:transform .25s, border-color .25s;
}
.card:hover { transform:translateY(-4px); border-color:rgba(0,212,160,.2); }
.card .icon { font-size:2rem; margin-bottom:1rem; }
.card h3 { margin-bottom:.5rem; color:var(--text); }
.card p { line-height:1.7; }

/* ── Setup Steps ── */
.setup { background:var(--bg); }
.steps { display:flex; flex-direction:column; gap:1.5rem; max-width:700px; margin:0 auto; }
.step {
  display:flex; gap:1.5rem; align-items:flex-start;
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:1.5rem;
}
.step-num {
  flex-shrink:0; width:48px; height:48px; border-radius:50%;
  background:var(--accent-soft); color:var(--accent);
  display:grid; place-items:center; font-weight:700; font-size:1.1rem;
}
.step-body h3 { margin-bottom:.3rem; color:var(--text); }
.code-block {
  background:var(--bg-code); border-radius:var(--radius-sm);
  padding:.8rem 1rem; margin:.8rem 0;
  font-family:var(--font-mono); font-size:.85rem;
  border:1px solid var(--border); overflow-x:auto;
}
.code-block code { color:var(--text); white-space:nowrap; }
.hint { font-size:.85rem; color:var(--text-dim); margin-top:.5rem; }

@media (max-width:480px){
  .step { flex-direction:column; gap:1rem; }
}

/* ── Wallet Split ── */
.split {
  display:grid; grid-template-columns:1fr 1fr; gap:4rem; align-items:center;
}
@media (max-width:900px){
  .split { grid-template-columns:1fr; gap:2rem; }
  .split-visual { order:-1; }
}

.checklist { list-style:none; margin:1.5rem 0; }
.checklist li {
  padding:.7rem 0; border-bottom:1px solid var(--border);
  color:var(--text-muted); font-size:.95rem;
}
.checklist li:last-child { border:none; }
.checklist strong { color:var(--text); font-weight:600; }

/* ── Terminal Animation ── */
.terminal {
  background:var(--bg-code); border:1px solid var(--border);
  border-radius:var(--radius-lg); overflow:hidden;
  box-shadow:0 8px 40px rgba(0,0,0,.4);
}
.term-body {
  padding:1.2rem 1.5rem; font-family:var(--font-mono); font-size:.82rem;
  color:var(--text-muted); line-height:1.8; min-height:200px;
}
.term-body .cmd { color:var(--accent); }
.term-body .out { color:var(--text-muted); }
.term-body .blink {
  display:inline-block; width:8px; height:16px; background:var(--accent);
  animation:blink 1s step-end infinite; vertical-align:middle; margin-left:.2rem;
}
@keyframes blink { 50% { opacity:0; } }

/* ── API Section ── */
.api { background:var(--bg-elevated); }
.section-desc { text-align:center; margin-top:-2rem; margin-bottom:2rem; }

.code-window {
  max-width:700px; margin:0 auto 2rem;
  background:var(--bg-code); border:1px solid var(--border);
  border-radius:var(--radius-lg); overflow:hidden;
  box-shadow:0 8px 40px rgba(0,0,0,.4);
}
.code-window pre {
  padding:1.2rem 1.5rem; overflow-x:auto; -webkit-overflow-scrolling:touch;
  font-family:var(--font-mono); font-size:.82rem; line-height:1.8;
}
.language-python .k { color:#ff79c6; }   /* keyword */
.language-python .n { color:#8be9fd; }   /* name */
.language-python .o { color:#ff79c6; }   /* operator */
.language-python .s { color:#f1fa8c; }   /* string */
.language-python .c { color:#6272a4; font-style:italic; } /* comment */
.language-python .mf{ color:#bd93f9; }   /* number */
.language-python .nb{ color:#50fa7b; }   /* builtin */

.sdk-grid {
  display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:1rem; max-width:700px; margin:0 auto;
}
.sdk-item {
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius); padding:1.2rem;
}
.sdk-item code {
  display:block; font-family:var(--font-mono); font-size:.8rem;
  color:var(--accent); margin-bottom:.4rem; word-break:break-all;
}
.sdk-item span { font-size:.82rem; color:var(--text-dim); }

/* ── CTA ── */
.cta-section {
  text-align:center; padding:var(--section-pad) var(--container-pad);
  background:
    radial-gradient(ellipse 60% 40% at 50% 100%, rgba(0,212,160,.06), transparent),
    var(--bg);
}
.cta-section h2 { margin-bottom:1rem; }
.cta-section p { margin-bottom:2rem; }

/* ── Footer ── */
footer { background:var(--bg-elevated); border-top:1px solid var(--border); padding:3rem 0 1.5rem; }
.footer-grid {
  display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  gap:2rem; margin-bottom:2rem;
}
.footer-grid strong { display:block; margin-bottom:1rem; color:var(--text); font-weight:600; }
.footer-grid a { display:block; color:var(--text-muted); padding:.2rem 0; font-size:.9rem; }
.footer-grid p { font-size:.85rem; color:var(--text-dim); line-height:1.6; }
.footer-bottom {
  display:flex; justify-content:space-between; align-items:center;
  padding-top:1.5rem; border-top:1px solid var(--border);
  font-size:.82rem; color:var(--text-dim); flex-wrap:wrap; gap:.5rem;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width:8px; height:8px; }
::-webkit-scrollbar-track { background:transparent; }
::-webkit-scrollbar-thumb { background:var(--text-dim); border-radius:4px; }
::-webkit-scrollbar-thumb:hover { background:var(--text-muted); }

/* ── Selection ── */
::selection { background:rgba(0,212,160,.25); color:var(--text); }

/* ── Prefers-reduced-motion ── */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after { animation:none !important; transition:none !important; }
  html { scroll-behavior:auto; }
}