/* ─── CSS Variables ───────────────────────────────────────────────────────── */
:root {
  --bg:        #0c0c0d;
  --surface:   #131316;
  --border:    #1e1e24;
  --text:      #e8e8ea;
  --muted:     #7a7a8a;
  --accent:    #a3e635;        /* lime — one clear signal color */
  --accent-dim: rgba(163, 230, 53, 0.12);
  --radius:    6px;
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;
  --max-w:    1100px;
}

/* ─── Reset ───────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ─── Layout ──────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ─── Header ──────────────────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(12, 12, 13, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  color: var(--text);
  transition: opacity 0.2s;
}
.logo:hover { opacity: 0.75; }
.logo-dot { color: var(--accent); }

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.9rem;
  color: var(--muted);
  transition: color 0.2s;
}
.nav-link:hover { color: var(--text); }

.nav-cta {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
  transition: opacity 0.2s;
}
.nav-cta:hover { opacity: 0.8; }

/* ─── Buttons ─────────────────────────────────────────────────────────────── */
.btn-primary {
  display: inline-block;
  padding: 0.7rem 1.5rem;
  background: var(--accent);
  color: #0c0c0d;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
}
.btn-primary:hover  { opacity: 0.9; transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }

/* ─── Hero ────────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  padding: 7rem 0 6rem;
  text-align: center;
}

.hero-inner { position: relative; z-index: 1; }

.hero-badge {
  display: inline-block;
  padding: 0.3rem 0.9rem;
  background: var(--accent-dim);
  border: 1px solid rgba(163, 230, 53, 0.3);
  color: var(--accent);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  margin-bottom: 2rem;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 5rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 1.5rem;
}
.hero-headline em {
  font-style: italic;
  color: var(--accent);
}

.hero-subhead {
  max-width: 560px;
  margin: 0 auto 2.5rem;
  font-size: 1.1rem;
  color: var(--muted);
  line-height: 1.7;
}

/* Decorative background grid */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.4;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 30%, transparent 100%);
}

/* ─── Problem / Solution ──────────────────────────────────────────────────── */
.problem-solution {
  position: relative;
  padding: 6rem 0;
  border-top: 1px solid var(--border);
  overflow: hidden;
}

/* Subtle grid pattern reused as section divider texture */
.hero-grid-divider {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.18;
  pointer-events: none;
}

.ps-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0;
  align-items: start;
}

.ps-col {
  padding: 0 3rem;
}

.ps-col:first-child { padding-left: 0; }
.ps-col:last-child  { padding-right: 0; }

/* Vertical divider between columns */
.ps-divider {
  width: 1px;
  background: var(--border);
  align-self: stretch;
  min-height: 200px;
}

.ps-heading {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 1.25rem;
  margin-top: 0.75rem;
}

.ps-heading em {
  font-style: italic;
  color: var(--accent);
}

.ps-text {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.75;
  max-width: 420px;
}

/* ─── Features ────────────────────────────────────────────────────────────── */
.features {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 2px);
  overflow: hidden;
  margin-top: 1rem;
}

.feature-card {
  background: var(--surface);
  padding: 2.5rem 2rem;
  transition: background 0.2s;
}
.feature-card:hover { background: #16161a; }

.feature-icon-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--accent-dim);
  border: 1px solid rgba(163, 230, 53, 0.2);
  border-radius: var(--radius);
  color: var(--accent);
  margin-bottom: 1.25rem;
  transition: background 0.2s, border-color 0.2s;
}

.feature-card:hover .feature-icon-wrap {
  background: rgba(163, 230, 53, 0.18);
  border-color: rgba(163, 230, 53, 0.35);
}

/* Legacy emoji icon — kept for any existing references */
.feature-icon {
  font-size: 1.75rem;
  margin-bottom: 1rem;
  line-height: 1;
}

.feature-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: var(--text);
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.65;
}

/* ─── FAQ ─────────────────────────────────────────────────────────────────── */
.faq-section {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
}

.faq-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 3rem;
  margin-top: 0.5rem;
}

.faq-list {
  max-width: 720px;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  list-style: none; /* remove default marker */
  user-select: none;
  transition: color 0.2s;
}

/* Remove default details marker in all browsers */
.faq-question::-webkit-details-marker { display: none; }
.faq-question::marker { display: none; }

.faq-question:hover { color: var(--accent); }

.faq-chevron {
  flex-shrink: 0;
  color: var(--muted);
  transition: transform 0.25s ease, color 0.2s;
}

details[open] .faq-chevron {
  transform: rotate(180deg);
  color: var(--accent);
}

.faq-answer {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.75;
  padding-bottom: 1.25rem;
  max-width: 620px;
}

/* ─── Waitlist ────────────────────────────────────────────────────────────── */
.waitlist-section {
  padding: 7rem 0;
  border-top: 1px solid var(--border);
}

.waitlist-inner { max-width: 580px; }

.waitlist-headline {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.waitlist-sub {
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.waitlist-form {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.waitlist-input {
  flex: 1;
  padding: 0.7rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}
.waitlist-input::placeholder { color: var(--muted); }
.waitlist-input:focus { border-color: var(--accent); }

.form-status {
  font-size: 0.875rem;
  min-height: 1.2em;
  margin-bottom: 0.5rem;
  transition: color 0.2s;
}
.form-status.success { color: var(--accent); }
.form-status.error   { color: #f87171; }

.form-note {
  font-size: 0.8rem;
  color: var(--muted);
}

/* ─── Footer ──────────────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1rem;
}

.footer-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.footer-social-link:hover {
  color: var(--text);
  border-color: #333340;
  background: var(--surface);
}

/* Legacy footer-nav — kept if referenced elsewhere */
.footer-nav {
  display: flex;
  gap: 1.5rem;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--muted);
  transition: color 0.2s;
}
.footer-link:hover { color: var(--text); }

.footer-copy {
  font-size: 0.8rem;
  color: var(--muted);
}

/* ─── Referral badge (shown when ?ref= present) ──────────────────────────── */
.ref-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.85rem;
  background: var(--accent-dim);
  border: 1px solid rgba(163, 230, 53, 0.35);
  color: var(--accent);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}

/* ─── Success card ────────────────────────────────────────────────────────── */
.success-card {
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 2px);
  max-width: 480px;
}

.success-position-wrap {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}

.success-position {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 400;
  color: var(--accent);
  line-height: 1;
}

.success-position-label {
  font-size: 1rem;
  color: var(--muted);
}

.success-message {
  font-size: 0.95rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.referral-link-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5rem 0.75rem;
  margin-bottom: 1.25rem;
  overflow: hidden;
}

.referral-link {
  flex: 1;
  font-size: 0.8rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: 'DM Mono', 'Courier New', monospace;
}

.copy-btn {
  flex-shrink: 0;
  padding: 0.35rem 0.85rem;
  background: var(--accent);
  color: #0c0c0d;
  border: none;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-body);
  transition: opacity 0.2s;
  white-space: nowrap;
}
.copy-btn:hover { opacity: 0.88; }

.share-buttons {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  transition: opacity 0.2s, transform 0.15s;
  text-decoration: none;
}
.share-btn:hover { opacity: 0.85; transform: translateY(-1px); }

.share-btn--twitter {
  background: #000;
  color: #fff;
  border: 1px solid #333;
}

.share-btn--email {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

/* ─── Mobile ──────────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .nav-link { display: none; }

  /* Problem/Solution: stack columns vertically */
  .ps-inner {
    grid-template-columns: 1fr;
  }
  .ps-divider {
    display: none;
  }
  .ps-col {
    padding: 0;
  }
  .ps-col + .ps-col {
    margin-top: 3rem;
  }

  /* Waitlist form stacks vertically */
  .waitlist-form {
    flex-direction: column;
  }
  .waitlist-input, .btn-primary {
    width: 100%;
    text-align: center;
  }

  /* Footer */
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
  }
}