/* =========================================================
   FlowBu — Coming Soon Site
   Dark, minimal, operator-grade. Matches app + marketing collateral.
   ========================================================= */

:root {
  --bg:           #121212;
  --panel:        #1A1A1A;
  --card:         #1A1A1A;
  --border:       #303030;
  --border-soft:  #242424;
  --text:         #E5E5E5;
  --text-secondary: #999999;
  --text-muted:   #666666;
  --accent:       #4F6DFF;
  --accent-hover: #6F87FF;

  --font: 'Helvetica Neue', Arial, sans-serif;

  --container-max: 1120px;
  --radius: 6px;
}

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

html { scroll-behavior: smooth; }

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

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

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover { color: var(--accent-hover); }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.container.narrow { max-width: 760px; }
.container.center { text-align: center; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 8px 16px;
  z-index: 1000;
}
.skip-link:focus { left: 0; }

/* ── Buttons ─────────────────────────────────────────── */
.btn {
  display: inline-block;
  font-family: var(--font);
  font-size: 14px;
  font-weight: 700;
  padding: 12px 22px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ── Badge ───────────────────────────────────────────── */
.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 5px 14px;
  background: rgba(79, 109, 255, 0.08);
}

/* ── Header ──────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(18, 18, 18, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-soft);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand { display: flex; align-items: center; }
.brand-wordmark {
  font-family: var(--font);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--accent);
}
.footer-wordmark { font-size: 16px; }

.main-nav { flex: 1; display: flex; justify-content: center; }

.nav-menu {
  display: flex;
  gap: 32px;
  list-style: none;
}
.nav-menu a {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
}
.nav-menu a:hover { color: var(--text); }

.nav-cta { font-size: 13px; padding: 9px 16px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  display: block;
}

/* ── Hero ────────────────────────────────────────────── */
.hero {
  padding: 96px 0 72px;
  border-bottom: 1px solid var(--border-soft);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.hero-copy h1 {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.1;
  margin: 16px 0 18px;
  letter-spacing: -0.01em;
}
.hero-sub {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 480px;
  margin-bottom: 28px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-screenshot {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.6);
}

/* ── Sections (generic) ──────────────────────────────── */
.section { padding: 80px 0; border-bottom: 1px solid var(--border-soft); }
.section:last-of-type { border-bottom: none; }

.section h2 {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 14px;
}
.section .lead {
  font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 14px;
}
.section p { margin-bottom: 14px; color: var(--text-secondary); }
.section .emphasis {
  color: var(--text);
  font-weight: 600;
  font-size: 18px;
}

/* ── Problem ─────────────────────────────────────────── */
.problem { background: var(--bg); }
.problem-layout { max-width: 880px; }

.problem-headline-main {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 28px;
  color: var(--text);
}
.problem-headline-main span { color: var(--accent); }

.problem-contrast {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 8px;
}
.contrast-line {
  position: relative;
  padding-left: 28px;
  font-size: 16px;
  line-height: 1.5;
  margin-bottom: 0;
}
.contrast-line::before {
  position: absolute;
  left: 0;
  top: 1px;
  font-size: 13px;
  font-weight: 700;
}
.contrast-line.has {
  color: var(--text-secondary);
}
.contrast-line.has::before {
  content: '✓';
  color: var(--text-muted);
}
.contrast-line.lacks {
  color: var(--text);
  font-weight: 600;
  max-width: 620px;
}
.contrast-line.lacks::before {
  content: '✕';
  color: var(--accent);
}

.problem-resolution {
  margin-top: 32px;
  padding: 20px 24px;
  border-left: 3px solid var(--accent);
}
.problem-resolution .emphasis { margin-bottom: 0; }

/* ── Showcase (consolidated What's Inside section) ──── */
.showcase-tabs {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 2px;
  margin-top: 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.tab-btn {
  background: var(--panel);
  border: none;
  border-right: 1px solid var(--border);
  padding: 16px 18px;
  text-align: left;
  cursor: pointer;
  font-family: var(--font);
  transition: background 0.15s;
}
.tab-btn:last-child { border-right: none; }
.tab-btn:hover { background: var(--card); }
.tab-btn.active { background: rgba(79, 109, 255, 0.1); }
.tab-title {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 3px;
}
.tab-btn.active .tab-title { color: var(--accent); }
.tab-desc {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
}
.tab-btn.active .tab-desc { color: var(--text-secondary); }

.showcase-display {
  margin-top: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.6);
}
.showcase-panel img { width: 100%; display: block; }

.workflow-chain {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 40px;
  margin-bottom: 32px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-muted);
}
.workflow-chain .arrow { color: var(--accent); font-weight: 400; }
.workflow-chain .current { color: var(--text); }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.feature-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}
.feature-card p { font-size: 14px; margin-bottom: 0; }

/* ── Audience ────────────────────────────────────────── */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 32px;
}
.audience-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 20px 20px 24px;
  overflow: hidden;
}
.audience-card .bracket-h {
  position: absolute;
  top: 0; left: 0;
  width: 40px; height: 3px;
}
.audience-card .bracket-v {
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 40px;
}
.audience-card.c1 .bracket-h, .audience-card.c1 .bracket-v { background: #FFE600; }
.audience-card.c2 .bracket-h, .audience-card.c2 .bracket-v { background: #00CFFF; }
.audience-card.c3 .bracket-h, .audience-card.c3 .bracket-v { background: #FF6EC7; }
.audience-card.c4 .bracket-h, .audience-card.c4 .bracket-v { background: #00FF9F; }
.audience-card h3 { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.audience-card p { font-size: 13.5px; margin-bottom: 0; }

/* ── CTA / Coming Soon ───────────────────────────────── */
.cta-section { padding-bottom: 88px; }
.cta-box {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 48px;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 40px;
  align-items: center;
}
.cta-main h2 {
  font-size: 32px;
  font-weight: 800;
  margin: 14px 0 12px;
  line-height: 1.2;
}
.cta-main .lead { margin-bottom: 0; max-width: 460px; }

.cta-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.cta-point {
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-left: 2px solid var(--accent);
  padding-left: 12px;
}
.cta-point-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.cta-point-value {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text);
}

.cta-contact {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 16px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.cta-contact p { margin: 0; color: var(--text-secondary); font-size: 14px; }

/* ── FAQ ─────────────────────────────────────────────── */
.faq-list { margin-top: 28px; display: flex; flex-direction: column; gap: 10px; }
.faq-item {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 18px;
}
.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  padding: 16px 0;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  float: right;
  color: var(--accent);
  font-weight: 400;
  font-size: 20px;
}
.faq-item[open] summary::after { content: '−'; }
.faq-item p { padding-bottom: 16px; margin-bottom: 0; font-size: 14px; }

/* ── Footer ──────────────────────────────────────────── */
.site-footer { padding: 48px 0; border-top: 1px solid var(--border-soft); }
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand p { color: var(--text-muted); font-size: 13px; margin: 0; }

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}
.footer-links a { color: var(--text-secondary); font-size: 13px; }
.footer-links a:hover { color: var(--text); }

.footer-copy { color: var(--text-muted); font-size: 12px; margin: 0; }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-copy h1 { font-size: 38px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .audience-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase-tabs { grid-template-columns: repeat(3, 1fr); }
  .tab-btn:nth-child(3) { border-right: none; }
  .cta-box { grid-template-columns: 1fr; }
  .cta-points { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border-soft);
    flex-direction: column;
    gap: 0;
    display: none;
    padding: 8px 24px 16px;
  }
  .nav-menu.open { display: flex; }
  .nav-menu li { padding: 10px 0; border-bottom: 1px solid var(--border-soft); }
  .nav-menu li:last-child { border-bottom: none; }

  .hero { padding: 56px 0 48px; }
  .hero-copy h1 { font-size: 32px; }
  .section { padding: 56px 0; }
  .section h2 { font-size: 24px; }
  .problem-inner h2 { font-size: 22px; }

  .feature-grid { grid-template-columns: 1fr; }
  .audience-grid { grid-template-columns: 1fr; }

  .problem-headline-main { font-size: 24px; }
  .contrast-line { font-size: 14.5px; }
  .problem-resolution { padding: 16px 18px; margin-top: 24px; }

  .showcase-tabs { grid-template-columns: repeat(2, 1fr); }
  .tab-btn:nth-child(odd) { border-right: 1px solid var(--border); }
  .tab-btn:nth-child(even) { border-right: none; }
  .tab-desc { display: none; }

  .cta-box { padding: 32px 24px; }
  .cta-main h2 { font-size: 26px; }
  .cta-points { grid-template-columns: 1fr; }
  .cta-contact { flex-direction: column; align-items: flex-start; gap: 12px; }

  .footer-inner { flex-direction: column; align-items: flex-start; }
}