:root {
  --bg: #ffffff;
  --soft: #f5f8fd;
  --panel: #ffffff;
  --border: #e4e9f2;
  --text: #16233f;
  --muted: #5b6473;
  --accent: #2f6fed;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.nav, footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  max-width: 1040px;
  margin: 0 auto;
}
.nav nav a, footer nav a { margin-left: 1.25rem; color: var(--text); }
.nav nav a:hover { color: var(--accent); text-decoration: none; }
.brand { display: inline-flex; align-items: center; font-weight: 700; font-size: 1.35rem; color: var(--text); letter-spacing: -0.01em; }
.brand span { color: var(--accent); }
.brand:hover { text-decoration: none; }

.cta {
  background: var(--accent);
  color: #fff !important;
  padding: 0.5rem 0.95rem;
  border-radius: 8px;
}
.cta:hover { text-decoration: none; opacity: 0.92; }

main { max-width: 1040px; margin: 0 auto; padding: 1.5rem; }

.hero { padding: 3rem 0 3.5rem; text-align: center; }
.hero-logo { width: min(560px, 88%); height: auto; margin: 0 auto 1.5rem; display: block; }
.hero-sub { color: var(--muted); max-width: 640px; margin: 0 auto 2rem; font-size: 1.15rem; }

.signup-card {
  max-width: 440px;
  margin: 0 auto;
  background: var(--soft);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.6rem 1.5rem;
  text-align: left;
}
.signup-card h2 { margin: 0 0 1rem; font-size: 1.25rem; text-align: center; }
.signup-card form { display: flex; flex-direction: column; gap: 0.6rem; }
.signup-card input {
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
  background: #fff;
  color: var(--text);
}
.signup-card input:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.signup-agree { display: flex; align-items: flex-start; gap: 0.5rem; font-size: 0.82rem; color: var(--muted); text-align: left; line-height: 1.4; }
.signup-agree input { width: auto; flex: none; margin-top: 0.15rem; padding: 0; }
.signup-agree a { color: var(--accent); }
.signup-card button {
  padding: 0.75rem 1rem;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}
.signup-card button:hover { opacity: 0.94; }
.signup-card button:disabled { opacity: 0.6; cursor: default; }
.signup-msg { min-height: 1.2rem; margin: 0.6rem 0 0; font-size: 0.9rem; color: var(--muted); text-align: center; }
.signup-msg.error { color: #c0392b; }
.signup-alt { text-align: center; color: var(--muted); font-size: 0.9rem; margin: 0.75rem 0 0; }

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.1rem;
  padding: 1.5rem 0 4rem;
}
.features article {
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 4px solid var(--fc, var(--accent));
  border-radius: 12px;
  padding: 1.3rem 1.4rem;
}
.features h3 { margin-top: 0; margin-bottom: 0.4rem; }
.features p { color: var(--muted); margin-bottom: 0; }
.features code { background: var(--soft); padding: 0.05rem 0.35rem; border-radius: 5px; font-size: 0.9em; }

footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  margin-top: 2rem;
}
footer nav a { color: var(--muted); }

.doc { max-width: 720px; margin: 0 auto; padding: 2.5rem 1.5rem; }
.doc h1 { margin-top: 0; }
.doc h2 { margin-top: 2rem; }

@media (prefers-color-scheme: dark) {
  :root { --bg:#0f1115; --soft:#171a21; --panel:#171a21; --border:#262b36; --text:#e6e9ef; --muted:#8b93a4; }
  .signup-card input { background:#0f1115; }
  .hero-logo { background:#fff; border-radius:16px; padding:1rem; }
  .brand-logo { background:#fff; border-radius:8px; padding:3px 6px; }
}

/* --- Product showcase (dashboard mockup) --- */
.showcase { padding: 1rem 0 2.5rem; text-align: center; }
.showcase-h { font-size: 1.6rem; margin: 0 0 0.3rem; }
.showcase-sub { color: var(--muted); margin: 0 0 1.6rem; }
.showcase-note { color: var(--muted); font-size: 0.82rem; margin: 0.8rem 0 0; }
.mock {
  max-width: 880px;
  margin: 0 auto;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(22, 35, 63, 0.22);
  border: 1px solid var(--border);
  text-align: left;
}
.mock-bar { display: flex; align-items: center; gap: 0.4rem; background: #e9edf5; padding: 0.55rem 0.9rem; }
.mock-bar i { width: 11px; height: 11px; border-radius: 50%; background: #c6cede; }
.mock-bar i:nth-child(1) { background: #ff5f57; }
.mock-bar i:nth-child(2) { background: #febc2e; }
.mock-bar i:nth-child(3) { background: #28c840; }
.mock-url { margin-left: 0.8rem; font-size: 0.78rem; color: #67728a; background: #fff; padding: 0.15rem 0.7rem; border-radius: 6px; }
/* Dark app interior — the product's default look. */
.mock-app { background: #0f1526; color: #e7ecf5; padding: 0; }
.mock-nav { display: flex; align-items: center; gap: 1rem; padding: 0.7rem 1rem; border-bottom: 1px solid #1e2740; font-size: 0.85rem; }
.mock-nav strong { color: #fff; }
.mock-tabs { color: #8b96ac; display: flex; gap: 0.85rem; }
.mock-tabs b { color: #fff; border-bottom: 2px solid var(--accent); padding-bottom: 2px; }
.mock-search { margin-left: auto; color: #8b96ac; font-size: 0.8rem; }
.mock-body { display: grid; grid-template-columns: 1.4fr 1fr; gap: 0.9rem; padding: 1rem; }
.mock-col { display: flex; flex-direction: column; gap: 0.9rem; }
.mock-upnext { background: linear-gradient(135deg, #2f6fed, #7b4fe0); border-radius: 12px; padding: 0.9rem 1rem; }
.mock-when { font-size: 0.74rem; opacity: 0.85; }
.mock-title { font-size: 1.15rem; font-weight: 700; margin: 0.15rem 0 0.6rem; }
.mock-actions { display: flex; gap: 0.5rem; }
.mock-btn { background: #fff; color: #16233f; font-size: 0.78rem; font-weight: 600; padding: 0.25rem 0.7rem; border-radius: 6px; }
.mock-btn.ghost { background: rgba(255,255,255,0.16); color: #fff; }
.mock-card { background: #151d33; border: 1px solid #1e2740; border-radius: 12px; padding: 0.85rem 1rem; }
.mock-card-h { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: #8b96ac; margin-bottom: 0.55rem; }
.mock-task { display: flex; align-items: center; gap: 0.5rem; padding: 0.3rem 0; font-size: 0.9rem; }
.mock-task i { color: #8b96ac; font-style: normal; }
.mock-task em { margin-left: auto; font-style: normal; font-size: 0.72rem; color: #8b96ac; background: #0f1526; padding: 0.05rem 0.45rem; border-radius: 999px; }
.mock-task em.hi { color: #ff8f8f; }
.mock-task.done { color: #667788; text-decoration: line-through; opacity: 0.7; }
.mock-ai { background: #17213b; border: 1px solid #24325a; border-radius: 12px; padding: 0.85rem 1rem; }
.mock-ai-line { font-size: 0.86rem; color: #c9d3e6; padding: 0.2rem 0; }
.mock-mail { font-size: 0.86rem; color: #c9d3e6; }
.mock-mail b { color: #fff; }
@media (max-width: 640px) {
  .mock-body { grid-template-columns: 1fr; }
  .mock-tabs { display: none; }
}

/* Pricing section */
.pricing { padding: 1rem 0 4rem; text-align: center; }
.pricing-sub { color: var(--muted); margin: 0 0 2rem; }
.price-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.1rem;
  align-items: stretch;
  text-align: left;
}
.price-card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.6rem 1.5rem;
  display: flex;
  flex-direction: column;
}
.price-card.featured { border-color: var(--accent); box-shadow: 0 6px 24px rgba(47,111,237,0.14); }
.price-badge {
  position: absolute; top: -0.7rem; left: 1.4rem;
  background: var(--accent); color: #fff;
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.03em;
  padding: 0.2rem 0.55rem; border-radius: 999px;
}
.price-card h3 { margin: 0 0 0.4rem; font-size: 1.25rem; }
.price { margin: 0 0 1rem; color: var(--text); }
.price b { font-size: 2.1rem; }
.price span { color: var(--muted); font-size: 0.95rem; }
.price-card ul { list-style: none; padding: 0; margin: 0 0 1.4rem; flex: 1; }
.price-card li { position: relative; padding: 0.3rem 0 0.3rem 1.4rem; color: var(--muted); }
.price-card li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
.price-cta {
  display: block; text-align: center;
  background: var(--soft); color: var(--text);
  border: 1px solid var(--border); border-radius: 9px;
  padding: 0.6rem 1rem; font-weight: 600;
}
.price-cta:hover { text-decoration: none; border-color: var(--accent); color: var(--accent); }
.price-card.featured .price-cta { background: var(--accent); color: #fff; border-color: var(--accent); }
.price-card.featured .price-cta:hover { opacity: 0.92; color: #fff; }