/* Star Digest — dark theme landing */
:root {
  --bg: #0a0b0f;
  --bg-elevated: #12141c;
  --bg-card: #161822;
  --bg-card-hover: #1c1f2e;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #e8eaf0;
  --text-muted: #9aa0b4;
  --text-dim: #6b7289;
  --accent: #7c6af5;
  --accent-bright: #9b8cff;
  --accent-soft: rgba(124, 106, 245, 0.15);
  --accent-glow: rgba(124, 106, 245, 0.35);
  --success: #34d399;
  --star: #fbbf24;
  --radius: 14px;
  --radius-sm: 10px;
  --font: "Inter", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, monospace;
  --max: 1080px;
  --shadow: 0 0 0 1px var(--border), 0 24px 48px -24px rgba(0, 0, 0, 0.6);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ambient glow */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(124, 106, 245, 0.22), transparent 55%),
    radial-gradient(ellipse 40% 30% at 90% 10%, rgba(56, 189, 248, 0.08), transparent 50%);
  pointer-events: none;
  z-index: 0;
}

a { color: var(--accent-bright); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 3px;
}

img { max-width: 100%; display: block; }

.wrap {
  position: relative;
  z-index: 1;
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

/* ---- Nav ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(10, 11, 15, 0.75);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.logo:hover { text-decoration: none; color: var(--text); }
.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #38bdf8);
  display: grid;
  place-items: center;
  font-size: 14px;
  box-shadow: 0 0 20px var(--accent-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.35rem 1.25rem;
  list-style: none;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-decoration: none;
}
.nav-links a:hover { color: var(--text); }

.nav-cta {
  display: none;
}
@media (min-width: 720px) {
  .nav-cta { display: inline-flex; }
  .nav-links .nav-hide-sm { display: list-item; }
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.7rem 1.25rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none !important;
  transition: background 0.15s, border-color 0.15s, transform 0.15s, box-shadow 0.15s;
  font-family: inherit;
  line-height: 1.2;
}
.btn:active { transform: scale(0.98); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #6354e0);
  color: #fff !important;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08), 0 8px 24px -8px var(--accent-glow);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-bright), var(--accent));
  box-shadow: 0 0 0 1px rgba(255,255,255,0.12), 0 12px 32px -8px var(--accent-glow);
}
.btn-ghost {
  background: transparent;
  color: var(--text) !important;
  border-color: var(--border-strong);
}
.btn-ghost:hover {
  background: var(--bg-card);
  border-color: rgba(255,255,255,0.22);
}
.btn-outline {
  background: var(--bg-card);
  color: var(--text) !important;
  border-color: var(--border-strong);
}
.btn-outline:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
}
.btn-lg { padding: 0.9rem 1.5rem; font-size: 1rem; }
.btn-block { width: 100%; }

/* ---- Hero ---- */
.hero {
  padding: 4.5rem 0 3.5rem;
  text-align: center;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid rgba(124, 106, 245, 0.35);
  color: var(--accent-bright);
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}
.hero h1 {
  font-size: clamp(1.85rem, 5vw, 2.85rem);
  font-weight: 750;
  letter-spacing: -0.035em;
  line-height: 1.2;
  max-width: 18ch;
  margin: 0 auto 1.15rem;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--accent-bright), #38bdf8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  color: var(--text-muted);
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  max-width: 42rem;
  margin: 0 auto 2rem;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 1rem;
}
.hero-note {
  color: var(--text-dim);
  font-size: 0.85rem;
}
.oauth-note {
  display: none;
  margin-top: 1rem;
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  border: 1px solid rgba(124, 106, 245, 0.3);
  color: var(--text-muted);
  font-size: 0.9rem;
  max-width: 28rem;
  margin-inline: auto;
}
.oauth-note.is-visible { display: block; }

/* ---- Sections ---- */
section { padding: 3.5rem 0; }
.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: 0.6rem;
}
.section-title {
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}
.section-lead {
  color: var(--text-muted);
  max-width: 36rem;
  margin-bottom: 2rem;
}

/* ---- Audience ---- */
.audience-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .audience-grid { grid-template-columns: repeat(3, 1fr); }
}
.audience-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.25rem;
  box-shadow: var(--shadow);
}
.audience-card .icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--accent-soft);
  display: grid;
  place-items: center;
  margin-bottom: 0.85rem;
  font-size: 1.1rem;
}
.audience-card h3 {
  font-size: 1rem;
  font-weight: 650;
  margin-bottom: 0.4rem;
  letter-spacing: -0.01em;
}
.audience-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
}
.not-for {
  margin-top: 1.25rem;
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border-strong);
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* ---- Steps ---- */
.steps {
  display: grid;
  gap: 1rem;
  counter-reset: step;
}
@media (min-width: 720px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
}
.step {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.25rem 1.35rem;
  box-shadow: var(--shadow);
}
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-bright);
  margin-bottom: 0.75rem;
  letter-spacing: 0.05em;
}
.step h3 {
  font-size: 1.05rem;
  font-weight: 650;
  margin-bottom: 0.45rem;
}
.step p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* ---- Sample digest card ---- */
.sample-wrap {
  max-width: 560px;
  margin-inline: auto;
}
.digest-card {
  background: linear-gradient(160deg, #1a1c28 0%, #12141c 100%);
  border: 1px solid var(--border-strong);
  border-radius: calc(var(--radius) + 4px);
  padding: 1.5rem 1.4rem;
  box-shadow:
    0 0 0 1px rgba(124, 106, 245, 0.12),
    0 32px 64px -28px rgba(0, 0, 0, 0.7),
    0 0 80px -40px var(--accent-glow);
}
.digest-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.85rem;
  align-items: center;
  margin-bottom: 0.85rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}
.digest-tag {
  background: var(--accent-soft);
  color: var(--accent-bright);
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.75rem;
}
.digest-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  letter-spacing: -0.02em;
}
.digest-card h3 a { color: var(--text); text-decoration: none; }
.digest-card h3 a:hover { color: var(--accent-bright); text-decoration: underline; }
.digest-starred {
  color: var(--star);
  font-size: 0.85rem;
  margin-bottom: 1.15rem;
}
.digest-block {
  margin-bottom: 1rem;
}
.digest-block:last-child { margin-bottom: 0; }
.digest-block dt {
  font-size: 0.75rem;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: 0.3rem;
}
.digest-block dd {
  color: var(--text-muted);
  font-size: 0.95rem;
}
.digest-block code {
  font-family: var(--mono);
  font-size: 0.82em;
  background: rgba(255,255,255,0.06);
  padding: 0.12em 0.4em;
  border-radius: 4px;
  color: #c4b5fd;
}

/* ---- Pricing ---- */
.pricing-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
  max-width: 720px;
  margin-inline: auto;
}
@media (min-width: 640px) {
  .pricing-grid { grid-template-columns: 1fr 1fr; }
}
.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}
.price-card.featured {
  border-color: rgba(124, 106, 245, 0.45);
  background: linear-gradient(165deg, rgba(124, 106, 245, 0.12), var(--bg-card) 40%);
  position: relative;
}
.price-card.featured::after {
  content: "推荐";
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 0.7rem;
  font-weight: 650;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
}
.price-name {
  font-size: 0.9rem;
  font-weight: 650;
  color: var(--accent-bright);
  margin-bottom: 0.5rem;
}
.price-amount {
  font-size: 2.4rem;
  font-weight: 750;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 0.25rem;
}
.price-amount span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0;
}
.price-desc {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin: 1rem 0 1.5rem;
  flex: 1;
}
.price-list {
  list-style: none;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.price-list li {
  padding: 0.35rem 0;
  padding-left: 1.4rem;
  position: relative;
}
.price-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 700;
}
.pricing-footnote {
  text-align: center;
  margin-top: 1.5rem;
  color: var(--text-dim);
  font-size: 0.85rem;
  max-width: 36rem;
  margin-inline: auto;
}

/* ---- FAQ ---- */
.faq-list {
  max-width: 640px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
details.faq {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0;
  overflow: hidden;
}
details.faq summary {
  padding: 1rem 1.15rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.98rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after {
  content: "+";
  font-weight: 400;
  color: var(--text-dim);
  font-size: 1.25rem;
  flex-shrink: 0;
}
details.faq[open] summary::after { content: "−"; }
details.faq .faq-a {
  padding: 0 1.15rem 1.1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}


/* ---- Waitlist ---- */
.waitlist {
  padding: 3rem 0 1rem;
  text-align: center;
}
.waitlist .section-lead {
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
}
.waitlist-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  align-items: stretch;
  margin: 1.5rem auto 0.75rem;
  max-width: 32rem;
}
.waitlist-input {
  flex: 1 1 14rem;
  min-width: 0;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-elevated);
  color: var(--text);
  font: inherit;
  font-size: 0.95rem;
}
.waitlist-input::placeholder { color: var(--text-dim); }
.waitlist-input:focus {
  outline: none;
  border-color: var(--accent-bright);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.waitlist-hint {
  color: var(--text-dim);
  font-size: 0.85rem;
  max-width: 36rem;
  margin: 0 auto;
}
.waitlist-hint code {
  font-family: var(--mono);
  font-size: 0.8em;
  color: var(--text-muted);
}
.waitlist-status {
  margin-top: 0.75rem;
  color: var(--success);
  font-size: 0.95rem;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---- Bottom CTA ---- */
.cta-band {
  text-align: center;
  padding: 3.5rem 0 4rem;
}
.cta-band-inner {
  background: linear-gradient(145deg, rgba(124, 106, 245, 0.18), rgba(56, 189, 248, 0.06));
  border: 1px solid rgba(124, 106, 245, 0.28);
  border-radius: calc(var(--radius) + 6px);
  padding: 2.5rem 1.5rem;
}
.cta-band h2 {
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.6rem;
}
.cta-band p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* ---- Footer ---- */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0 2.5rem;
  color: var(--text-dim);
  font-size: 0.85rem;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
}
.footer a { color: var(--text-muted); }
.footer a:hover { color: var(--text); }

/* ---- Skip link ---- */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip:focus { left: 1rem; top: 1rem; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}