/* ---------------------------------------------
   bflow — Landing Page
   your space anywhere.

   Design tokens mirror the product app's "Atelier"
   system (frontend/app/assets/css/main.css and
   frontend/app/plugins/vuetify.js): flat surfaces,
   hairline borders, no radius, no shadow, Fraunces
   for headings, Inter for body/UI, IBM Plex Mono
   for labels/eyebrows/tags. The three role colors
   (pink/blue/green) are the only accent hues.
--------------------------------------------- */

:root{
  --pink: #ec0c8d;
  --blue: #1fa9e0;
  --green: #8bc53f;

  --ink: #111111;
  --ink-soft: #8a8a8a;
  --line: #e2e2e2;
  --bg: #ffffff;
  --bg-soft: #f7f7f7;
  --bg-dark: #0d0d0d;
  --bg-dark-soft: #1c1c1c;

  --font-display: 'Fraunces', ui-serif, Georgia, serif;
  --font-body: 'Inter', ui-sans-serif, system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  font-family: var(--font-body);
  font-weight: 300;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

.container{
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2{
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
  color: var(--ink);
}
h1{ font-size: clamp(2.1rem, 4.2vw, 3.4rem); text-wrap: balance; }
h2{ font-size: clamp(1.7rem, 3vw, 2.4rem); text-wrap: balance; }

h3{
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: 1.15rem;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  color: var(--ink);
}

p{ line-height: 1.65; font-weight: 300; color: var(--ink-soft); margin: 0 0 12px; }

a{ color: inherit; text-decoration: none; }

ul{ padding-left: 0; list-style: none; margin: 0; }

.section{ padding: 88px 0; }
.section-eyebrow{
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 12px;
}
.section-sub{ max-width: 620px; font-size: 1.05rem; }

/* ---------- Buttons ---------- */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 12px 22px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-primary{
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}
.btn-primary:hover{ background: transparent; color: var(--ink); }
.btn-lg{ padding: 15px 30px; font-size: 1.02rem; }
.btn-ghost{
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover{ border-color: var(--ink); }
.btn-link{
  color: var(--ink);
  font-weight: 600;
  padding: 12px 4px;
  min-height: 0;
}
.btn-link:hover{ opacity: 0.7; }
.btn-link-invert{
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  color: #fff;
  padding: 12px 4px;
  min-height: 0;
  opacity: 0.85;
}
.btn-link-invert:hover{ opacity: 1; }

/* ---------- Header ---------- */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 76px;
}
.brand{ display: flex; align-items: center; gap: 10px; }
.brand-mark{ width: 26px; height: 26px; flex: none; object-fit: contain; }
.brand-word{
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 600;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.brand-word-invert{ color: #fff; }

.nav{
  display: flex;
  gap: 28px;
  align-items: center;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.95rem;
}
.nav a:hover{ color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }
.header-cta{ display: flex; align-items: center; gap: 12px; }
.nav-toggle{
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span{
  display: block;
  height: 2px;
  background: var(--ink);
}

/* ---------- Hero ---------- */
.hero{
  background: var(--bg-soft);
  padding-top: 72px;
  overflow: hidden;
}
.hero-inner{
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding-bottom: 56px;
}
.eyebrow{
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 7px 14px;
  border: 1px solid var(--line);
  background: #fff;
  margin-bottom: 18px;
}
.hero-sub{ font-size: 1.1rem; max-width: 520px; }
.hero-actions{ display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.hero-actions.center{ justify-content: center; }
.hero-note{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  margin-top: 14px;
  color: var(--ink-soft);
}

.hero-visual{
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 12px;
}
.flow-card{
  background: #fff;
  border: 1px solid var(--line);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: 340px;
}
.flow-card strong{
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: 1.05rem;
}
.flow-meta{ font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink-soft); }
.flow-tag{
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 9px;
  border: 1px solid currentColor;
  width: fit-content;
  margin-bottom: 6px;
}
.card-owner{ margin-left: 0; }
.card-owner .flow-tag{ color: var(--pink); }
.card-pro{ margin-left: 34px; }
.card-pro .flow-tag{ color: var(--blue); }
.card-client{ margin-left: 68px; }
.card-client .flow-tag{ color: var(--green); }

.hero-proof{ border-top: 1px solid var(--line); background: #fff; }
.hero-proof-inner{
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding: 22px 24px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}
.proof-pills{ display: flex; gap: 10px; flex-wrap: wrap; }
.proof-pills span{
  background: var(--bg-soft);
  border: 1px solid var(--line);
  padding: 6px 14px;
  font-family: var(--font-body);
  font-weight: 500;
  color: var(--ink);
}

/* ---------- Problem ---------- */
.problem-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 36px;
}
.problem-item{
  background: var(--bg-soft);
  padding: 28px 24px;
  border: 1px solid var(--line);
}
.problem-icon{ font-size: 2.5rem; line-height: 1; margin-bottom: 18px; }

/* ---------- Persona cards ---------- */
.persona-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.persona-card{
  padding: 32px 28px;
  border: 1px solid var(--line);
  background: #fff;
  position: relative;
  overflow: hidden;
}
.persona-card::before{
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
}
.persona-owner::before{ background: var(--pink); }
.persona-pro::before{ background: var(--blue); }
.persona-client::before{ background: var(--green); }
.persona-icon{ font-size: 2.75rem; line-height: 1; margin-bottom: 16px; }
.persona-tag{
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 8px;
}
.persona-card ul{ margin-top: 16px; display: flex; flex-direction: column; gap: 10px; }
.persona-card li{
  position: relative;
  padding-left: 22px;
  font-size: 0.95rem;
  font-weight: 300;
  color: var(--ink-soft);
  line-height: 1.5;
}
.persona-card li::before{
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  font-weight: 700;
  color: var(--ink);
}

/* ---------- Steps ---------- */
.steps{ background: var(--bg-soft); }
.steps-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.step{
  background: #fff;
  border: 1px solid var(--line);
  padding: 28px 24px;
}
.step-number{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--ink);
  color: var(--ink);
  font-family: var(--font-mono);
  font-weight: 500;
  margin-bottom: 16px;
}

/* ---------- Features ---------- */
.features-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 40px;
}
.feature{
  padding: 28px 24px;
  border: 1px solid var(--line);
}
.feature-icon{ font-size: 2.4rem; line-height: 1; margin-bottom: 16px; }

/* ---------- Use case ---------- */
.usecase{ background: var(--bg-soft); }
.usecase-inner{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.usecase-space{
  background: #fff;
  border: 1px solid var(--line);
  padding: 24px;
}
.usecase-space-header{
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.usecase-space-header strong{ font-family: var(--font-display); font-style: italic; font-weight: 500; font-size: 1.05rem; }
.usecase-space-header span{ font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink-soft); }
.usecase-station{
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.usecase-station:last-child{ border-bottom: none; }
.usecase-station strong{ display: block; font-size: 0.98rem; font-weight: 500; }
.usecase-station span{ font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink-soft); }
.dot{ width: 10px; height: 10px; flex-shrink: 0; }
.dot-busy{ background: var(--pink); }
.dot-free{ background: var(--green); }

/* ---------- Final CTA ---------- */
.final-cta{
  background: var(--bg-dark);
  color: #fff;
  text-align: center;
}
.final-cta-inner{ max-width: 640px; }
.final-cta h2{ color: #fff; }
.final-cta p{ color: rgba(255,255,255,0.65); font-size: 1.05rem; }
.final-cta .btn-primary{ background: transparent; border-color: #fff; color: #fff; }
.final-cta .btn-primary:hover{ background: #fff; color: var(--ink); }

/* ---------- FAQ ---------- */
.faq-list{ margin-top: 32px; max-width: 720px; }
.faq-item{ border-bottom: 1px solid var(--line); }
.faq-question{
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 20px 4px;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  gap: 16px;
}
.faq-icon{
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--pink);
  transition: transform 0.2s ease;
}
.faq-item.open .faq-icon{ transform: rotate(45deg); }
.faq-answer{
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
}
.faq-answer p{ padding: 0 4px 20px; }

/* ---------- Footer ---------- */
.site-footer{ background: var(--bg-dark); color: rgba(255,255,255,0.75); }
.footer-inner{
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 48px;
  padding: 64px 0 40px;
}
.footer-brand .brand{ margin-bottom: 14px; }
.footer-brand p{ color: rgba(255,255,255,0.5); font-weight: 300; max-width: 280px; }
.footer-cols{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer-col h4{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  margin: 0 0 14px;
}
.footer-col a{
  display: block;
  color: rgba(255,255,255,0.65);
  font-size: 0.92rem;
  margin-bottom: 10px;
}
.footer-col a:hover{ color: #fff; }
.footer-bottom{
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: rgba(255,255,255,0.4);
}

/* ---------- Responsive ---------- */
@media (max-width: 980px){
  .problem-grid{ grid-template-columns: repeat(2, 1fr); }
  .persona-grid{ grid-template-columns: 1fr; }
  .steps-grid{ grid-template-columns: repeat(2, 1fr); }
  .features-grid{ grid-template-columns: repeat(2, 1fr); }
  .hero-inner{ grid-template-columns: 1fr; }
  .hero-visual{ order: -1; }
  .usecase-inner{ grid-template-columns: 1fr; }
  .usecase-visual{ order: -1; }
  .footer-inner{ grid-template-columns: 1fr; }
}

@media (max-width: 720px){
  .section{ padding: 64px 0; }
  .nav{
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px;
    gap: 18px;
    display: none;
  }
  .nav.open{ display: flex; }
  .nav-toggle{ display: flex; }
  .header-cta .btn-ghost{ display: none; }
  .problem-grid{ grid-template-columns: 1fr; }
  .steps-grid{ grid-template-columns: 1fr; }
  .features-grid{ grid-template-columns: 1fr; }
  .footer-cols{ grid-template-columns: 1fr 1fr; }
  .card-pro{ margin-left: 16px; }
  .card-client{ margin-left: 32px; }
  .hero-actions .btn{ width: 100%; }
  .hero-actions.center{ flex-direction: column; }
}