:root {
  --bg: #07090e;
  --bg-2: #0b0e15;
  --panel: rgba(20, 24, 33, 0.55);
  --panel-solid: #14181f;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #eaeef6;
  --muted: #8a92a6;
  --muted-2: #b1b8c8;
  --accent: #7c5cff;
  --accent-2: #00d4ff;
  --pink: #ff4d8a;
  --good: #10b981;
  --canvas-red: #d6122a;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
code, kbd {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: var(--panel-solid);
  border: 1px solid var(--line);
  padding: 1px 6px;
  border-radius: 5px;
}

.bg-grid {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 30%, transparent 80%);
}

.bg-glow {
  position: fixed; top: -400px; left: 50%; z-index: 0;
  transform: translateX(-50%);
  width: 1400px; height: 900px;
  pointer-events: none;
  background:
    radial-gradient(circle at 30% 30%, rgba(124,92,255,0.22), transparent 50%),
    radial-gradient(circle at 75% 50%, rgba(0,212,255,0.16), transparent 55%),
    radial-gradient(circle at 50% 80%, rgba(255,77,138,0.10), transparent 60%);
  filter: blur(30px);
}

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(7, 9, 14, 0.7);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  padding: 14px 24px;
  display: flex; justify-content: space-between; align-items: center;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 16px;
}
.logo {
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, rgba(124,92,255,0.2), rgba(0,212,255,0.2));
  border: 1px solid var(--line-strong);
  display: grid; place-items: center;
  overflow: hidden;
}
.logo img { width: 100%; height: 100%; object-fit: cover; }
.nav-links {
  display: flex; align-items: center; gap: 28px;
  font-size: 14px;
}
.nav-links a { color: var(--muted-2); transition: color .15s ease; }
.nav-links a:hover { color: var(--text); }

.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white !important;
  padding: 8px 16px;
  border-radius: 9px;
  font-weight: 600;
  font-size: 13px;
  transition: transform .12s ease, filter .12s ease;
}
.nav-cta:hover { transform: translateY(-1px); filter: brightness(1.1); }

/* Hero */
.hero {
  position: relative; z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px 60px;
  text-align: center;
}
.hero-inner { max-width: 880px; margin: 0 auto; }

.badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--panel);
  backdrop-filter: blur(12px);
  border: 1px solid var(--line-strong);
  padding: 6px 14px;
  border-radius: 99px;
  font-size: 12px;
  color: var(--muted-2);
  margin-bottom: 24px;
  font-family: ui-monospace, monospace;
}
.badge .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--good);
  box-shadow: 0 0 8px var(--good);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.05;
  letter-spacing: -1.5px;
  margin: 0 0 22px;
  font-weight: 700;
}
.grad {
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--pink));
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shift 6s ease-in-out infinite;
}
@keyframes shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.lede {
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--muted-2);
  max-width: 680px;
  margin: 0 auto 36px;
}

.cta-row {
  display: flex; gap: 14px; justify-content: center; align-items: center;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.btn-primary {
  display: inline-flex; align-items: center; gap: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  padding: 14px 24px;
  border-radius: 12px;
  font-weight: 600;
  text-align: left;
  position: relative;
  overflow: hidden;
  transition: transform .15s ease, box-shadow .15s ease;
  box-shadow: 0 10px 40px -10px rgba(124,92,255,0.5);
}
.btn-primary::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255,255,255,0.2), transparent);
  transform: translateX(-100%);
  transition: transform .6s ease;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 50px -10px rgba(124,92,255,0.7); }
.btn-primary:hover::before { transform: translateX(100%); }

.btn-main { display: block; font-size: 15px; line-height: 1.2; }
.btn-sub { display: block; font-size: 11px; opacity: 0.85; line-height: 1.3; }

.btn-ghost {
  color: var(--muted-2);
  font-size: 14px;
  font-weight: 500;
  padding: 14px 8px;
  transition: color .15s ease;
}
.btn-ghost:hover { color: var(--text); }

.btn-secondary {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--panel-solid);
  border: 1px solid var(--line-strong);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  transition: all .15s ease;
}
.btn-secondary:hover { border-color: var(--accent); transform: translateY(-1px); }

.trust {
  display: flex; gap: 24px; justify-content: center; flex-wrap: wrap;
  font-size: 13px;
  color: var(--muted);
}
.trust-item {
  display: inline-flex; align-items: center; gap: 6px;
}
.trust-item svg { color: var(--good); }

/* Browser mock */
.mock {
  margin: 60px auto 0;
  max-width: 1080px;
  background: var(--panel-solid);
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  overflow: hidden;
  box-shadow:
    0 30px 80px -20px rgba(0,0,0,0.6),
    0 0 0 1px rgba(255,255,255,0.05) inset;
  transform: perspective(1400px) rotateX(2deg);
  transform-origin: center top;
}
.mock-bar {
  display: flex; align-items: center; gap: 8px;
  background: #1a1f2a;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}
.mock-dot { width: 11px; height: 11px; border-radius: 50%; }
.mock-dot.red { background: #ff5f57; }
.mock-dot.yellow { background: #febc2e; }
.mock-dot.green { background: #28c840; }
.mock-url {
  margin-left: 12px;
  background: #0d1018;
  padding: 5px 14px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--muted);
  font-family: ui-monospace, monospace;
  flex: 1;
  max-width: 480px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mock-body {
  padding: 0;
  position: relative;
  min-height: 360px;
  background: #f4f4f6;
}

/* Canvas page mock */
.canvas-page {
  display: grid;
  grid-template-columns: 80px 1fr;
  height: 100%;
}
.canvas-side {
  background: #2D3B45;
  padding: 20px 0;
  display: flex; flex-direction: column; gap: 4px;
}
.cs-row {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 12px 8px;
  font-size: 10px;
  color: rgba(255,255,255,0.7);
}
.cs-row.active {
  background: rgba(255,255,255,0.08);
  color: white;
}
.cs-icon {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
}
.canvas-main {
  padding: 24px 28px;
  background: white;
  color: #2D3B45;
  text-align: left;
}
.cm-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--canvas-red);
}
.cm-q {
  background: #fafbfc;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 16px;
}
.cm-q-num {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #6b7280;
  margin-bottom: 8px;
}
.cm-q-text {
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 14px;
  line-height: 1.4;
}
.cm-q-opts { display: grid; gap: 6px; }
.cm-opt {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px;
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  font-size: 13px;
  color: #374151;
}
.dot-r {
  width: 14px; height: 14px;
  border: 2px solid #d1d5db;
  border-radius: 50%;
}

/* AI panel overlay */
.ai-panel {
  position: absolute;
  bottom: 16px;
  right: 16px;
  width: 280px;
  background: rgba(17, 21, 28, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 20px 60px -10px rgba(0,0,0,0.5);
  text-align: left;
  font-size: 12px;
  color: var(--text);
}
.ai-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  background: linear-gradient(180deg, rgba(124,92,255,0.12), transparent);
}
.ai-head-l { display: flex; align-items: center; gap: 6px; font-weight: 600; }
.ai-pulse {
  width: 7px; height: 7px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 1.5s ease-in-out infinite;
}
.ai-model {
  background: rgba(124,92,255,0.18);
  border: 1px solid rgba(124,92,255,0.35);
  color: #c4b3ff;
  padding: 1px 7px;
  border-radius: 6px;
  font-size: 10px;
  font-family: ui-monospace, monospace;
}

.ai-msgs {
  padding: 12px;
  display: flex; flex-direction: column; gap: 8px;
}
.ai-msg {
  padding: 8px 11px;
  border-radius: 10px;
  font-size: 12px;
  line-height: 1.5;
  max-width: 90%;
}
.ai-msg.user {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  align-self: flex-end;
  border-bottom-right-radius: 3px;
}
.ai-msg.ai {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  align-self: flex-start;
  border-bottom-left-radius: 3px;
  display: grid;
  gap: 6px;
}
.ai-step b { color: var(--accent-2); margin-right: 4px; }
.ai-step code {
  background: rgba(124,92,255,0.15);
  border-color: rgba(124,92,255,0.3);
  font-size: 11px;
}
.answer {
  background: linear-gradient(90deg, rgba(16,185,129,0.2), rgba(16,185,129,0));
  border-left: 2px solid var(--good);
  padding: 2px 8px;
  display: inline-block;
  border-radius: 0 4px 4px 0;
  font-weight: 600;
}

.ai-input {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px;
  border-top: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.02);
}
.ai-input-text {
  flex: 1;
  color: var(--muted);
  font-size: 12px;
}
.ai-send {
  width: 22px; height: 22px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 50%;
  color: white;
  font-size: 12px;
  font-weight: 700;
}

/* Features */
.features {
  position: relative; z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
}
.features h2, .install h2, .faq h2, .apikey h2 {
  font-size: clamp(28px, 3.5vw, 36px);
  letter-spacing: -0.5px;
  text-align: center;
  margin: 0 0 12px;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 40px;
}
.feature {
  background: var(--panel);
  backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  transition: transform .2s ease, border-color .2s ease;
}
.feature:hover { transform: translateY(-3px); border-color: var(--line-strong); }
.feat-icon {
  width: 44px; height: 44px;
  border-radius: 11px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, color-mix(in srgb, var(--c1) 25%, transparent), color-mix(in srgb, var(--c2) 25%, transparent));
  border: 1px solid color-mix(in srgb, var(--c1) 40%, transparent);
  color: white;
  margin-bottom: 16px;
}
.feature h3 { margin: 0 0 6px; font-size: 16px; }
.feature p { margin: 0; color: var(--muted-2); font-size: 14px; }

/* API key section */
.apikey {
  position: relative; z-index: 1;
  padding: 60px 24px;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(124,92,255,0.06), transparent 60%);
}
.apikey-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: start;
}
.apikey h2 { text-align: left; margin: 0 0 14px; }
.apikey-label {
  display: inline-block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent-2);
  margin-bottom: 12px;
  padding: 4px 10px;
  border: 1px solid rgba(0,212,255,0.3);
  border-radius: 99px;
  background: rgba(0,212,255,0.08);
}
.apikey-text > p {
  color: var(--muted-2);
  margin: 0 0 20px;
}
.apikey-text ol {
  padding-left: 20px;
  margin: 0 0 24px;
  color: var(--muted-2);
}
.apikey-text ol li { margin-bottom: 8px; }
.apikey-text ol a { color: var(--accent-2); text-decoration: underline; }

.apikey-card {
  background: var(--panel);
  backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
}
.apikey-card-head {
  display: flex; align-items: center; gap: 8px;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 16px;
  color: var(--muted-2);
}
.apikey-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--good);
  box-shadow: 0 0 8px var(--good);
}
.model-list { display: grid; gap: 10px; }
.model {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
}
.model-name {
  display: flex; align-items: center; gap: 8px;
  font-size: 14px;
  margin-bottom: 4px;
}
.model-name b { font-family: ui-monospace, monospace; }
.model-tag {
  background: rgba(124,92,255,0.15);
  border: 1px solid rgba(124,92,255,0.3);
  color: #b3a3ff;
  font-size: 10px;
  padding: 1px 7px;
  border-radius: 99px;
  font-weight: 500;
  font-family: -apple-system, sans-serif;
}
.model-tag.tag-good {
  background: rgba(16,185,129,0.15);
  border-color: rgba(16,185,129,0.3);
  color: #6ee7b7;
}
.model-desc { font-size: 12px; color: var(--muted); }

/* Install */
.install {
  position: relative; z-index: 1;
  max-width: 880px;
  margin: 0 auto;
  padding: 60px 24px;
}
.install-lede {
  text-align: center; color: var(--muted);
  margin: 0 0 40px;
}

.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 16px;
}
.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  background: var(--panel);
  backdrop-filter: blur(12px);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  align-items: start;
}
.step-num {
  width: 38px; height: 38px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid; place-items: center;
  font-weight: 700;
  color: white;
  font-size: 16px;
  flex-shrink: 0;
}
.step-body h3 { margin: 0 0 8px; font-size: 17px; }
.step-body p { margin: 0 0 14px; color: var(--muted-2); }
.step-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--panel-solid);
  border: 1px solid var(--line-strong);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 9px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s ease;
}
.step-btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.step-btn code { background: transparent; border: 0; padding: 0; }
.step-hint {
  background: rgba(124,92,255,0.08);
  border: 1px solid rgba(124,92,255,0.2);
  border-radius: 9px;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--muted-2);
}
.step-hint a { color: var(--accent-2); text-decoration: underline; }

/* FAQ */
.faq {
  position: relative; z-index: 1;
  max-width: 760px;
  margin: 0 auto;
  padding: 60px 24px;
}
.faq-list { display: grid; gap: 8px; margin-top: 40px; }
.faq details {
  background: var(--panel);
  backdrop-filter: blur(12px);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 20px;
  transition: border-color .15s ease;
}
.faq details[open] { border-color: var(--line-strong); }
.faq summary {
  cursor: pointer;
  font-weight: 600;
  padding-right: 24px;
  position: relative;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0; top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  color: var(--muted);
  transition: transform .2s ease;
  font-weight: 300;
}
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq p {
  margin: 12px 0 0;
  color: var(--muted-2);
  font-size: 14px;
}
.faq p code { font-size: 12px; }

/* Footer */
.footer {
  position: relative; z-index: 1;
  border-top: 1px solid var(--line);
  margin-top: 60px;
  padding: 32px 24px;
}
.footer-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 16px;
}
.footer-text { color: var(--muted); font-size: 13px; margin: 0; }
.footer-links { display: flex; gap: 20px; font-size: 13px; }
.footer-links a { color: var(--muted-2); transition: color .15s ease; }
.footer-links a:hover { color: var(--text); }

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--panel-solid);
  border: 1px solid var(--line-strong);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 13px;
  z-index: 100;
  opacity: 0;
  transition: all .25s ease;
  box-shadow: 0 12px 40px -10px rgba(0,0,0,0.6);
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 880px) {
  .apikey-inner { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .nav-links { gap: 14px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .step { grid-template-columns: 1fr; }
  .step-num { width: 32px; height: 32px; font-size: 14px; }
  .footer-inner { flex-direction: column; text-align: center; }
  .ai-panel { width: 220px; }
  .canvas-page { grid-template-columns: 60px 1fr; }
  .canvas-side { padding: 12px 0; }
  .canvas-main { padding: 16px; }
  .cm-q { padding: 12px; }
}