:root {
  --ba-blue: #2c4a9c;
  --ba-blue-dark: #1d3372;
  --ba-purple: #7b5ec7;
  --ba-pink: #e8407f;
  --ba-orange: #f4923f;
  --ba-teal: #26a97b;
  --ba-gray: #9ca3af;
  --ba-ink: #1b2333;
  --ba-ink-soft: #4b5468;
  --ba-bg-soft: #f6f7fb;
  --ba-border: #e6e8f0;
  --ba-gradient: linear-gradient(115deg, var(--ba-pink) 0%, var(--ba-purple) 35%, var(--ba-blue) 65%, var(--ba-teal) 100%);
  --ba-radius: 16px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--ba-ink);
  background: #fff;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 { font-weight: 700; color: var(--ba-ink); }

a { color: var(--ba-blue); text-decoration: none; }
a:hover { color: var(--ba-blue-dark); }

.text-gradient {
  background: var(--ba-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Buttons */
.ba-btn-primary, .ba-btn-secondary, .ba-btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .75rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: .95rem;
  border: none;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.ba-btn-primary {
  background: var(--ba-gradient);
  color: #fff;
  box-shadow: 0 8px 20px -8px rgba(44, 74, 156, .5);
}
.ba-btn-primary:hover { color: #fff; transform: translateY(-1px); box-shadow: 0 12px 24px -8px rgba(44, 74, 156, .6); }
.ba-btn-secondary {
  background: #fff;
  color: var(--ba-blue);
  border: 1.5px solid var(--ba-border);
}
.ba-btn-secondary:hover { color: var(--ba-blue-dark); border-color: var(--ba-blue); }
.ba-btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,.6);
}
.ba-btn-outline:hover { color: #fff; background: rgba(255,255,255,.12); }
.ba-btn-lg { padding: .95rem 2rem; font-size: 1.05rem; }

/* Header */
.ba-header { position: sticky; top: 0; z-index: 1000; background: rgba(255,255,255,.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--ba-border); }
.ba-navbar { padding: .75rem 0; }
.ba-brand img { height: 34px; }
.ba-navbar .nav-link { color: var(--ba-ink-soft); font-weight: 500; padding: .5rem 1rem; }
.ba-navbar .nav-link:hover { color: var(--ba-blue); }

/* Hero */
.ba-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #f8f8fd 0%, #ffffff 100%);
  padding: 5rem 0 6rem;
}
.ba-hero::before {
  content: "";
  position: absolute;
  top: -220px;
  right: -180px;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: var(--ba-gradient);
  opacity: .12;
  filter: blur(10px);
}
.ba-hero-content { position: relative; z-index: 1; }
.ba-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .4rem .9rem;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--ba-border);
  font-size: .82rem;
  font-weight: 600;
  color: var(--ba-purple);
  margin-bottom: 1.5rem;
}
.ba-eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ba-gradient); }
.ba-hero h1 { font-size: clamp(2.1rem, 4vw, 3.2rem); line-height: 1.15; margin-bottom: 1.25rem; }
.ba-hero-lead { font-size: 1.15rem; color: var(--ba-ink-soft); max-width: 560px; margin-bottom: 2rem; }
.ba-hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 2.5rem; }
.ba-hero-note { font-size: .85rem; color: var(--ba-ink-soft); }

.ba-hero-visual {
  position: relative;
  background: #fff;
  border-radius: 20px;
  border: 1px solid var(--ba-border);
  box-shadow: 0 30px 60px -20px rgba(27, 35, 51, .18);
  padding: 1.5rem;
}
.ba-hero-visual .ba-visual-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.ba-visual-pill { font-size: .78rem; font-weight: 600; padding: .3rem .7rem; border-radius: 999px; background: var(--ba-bg-soft); color: var(--ba-ink-soft); }
.ba-visual-row { display: flex; justify-content: space-between; align-items: center; padding: .85rem 0; border-bottom: 1px dashed var(--ba-border); }
.ba-visual-row:last-child { border-bottom: none; }
.ba-visual-flat { font-weight: 700; }
.ba-visual-badge { font-size: .72rem; font-weight: 700; padding: .25rem .6rem; border-radius: 999px; }
.ba-visual-badge.ok { background: rgba(38,169,123,.12); color: var(--ba-teal); }
.ba-visual-badge.warn { background: rgba(232,64,127,.12); color: var(--ba-pink); }

/* Stats bar */
.ba-stats {
  background: var(--ba-ink);
  padding: 2.5rem 0;
}
.ba-stat { text-align: center; color: #fff; }
.ba-stat .num { font-size: 2.1rem; font-weight: 800; background: var(--ba-gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.ba-stat .label { font-size: .88rem; color: rgba(255,255,255,.65); margin-top: .25rem; }

/* Section shared */
.ba-section { padding: 6rem 0; }
.ba-section-soft { background: var(--ba-bg-soft); }
.ba-section-head { max-width: 640px; margin: 0 auto 3.5rem; text-align: center; }
.ba-section-tag { display: inline-block; font-size: .8rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--ba-purple); margin-bottom: .75rem; }
.ba-section-head h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); margin-bottom: .85rem; }
.ba-section-head p { color: var(--ba-ink-soft); font-size: 1.05rem; }

/* Persona cards */
.ba-persona-card {
  height: 100%;
  padding: 2rem;
  border-radius: var(--ba-radius);
  border: 1px solid var(--ba-border);
  background: #fff;
  transition: transform .2s ease, box-shadow .2s ease;
}
.ba-persona-card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px -20px rgba(27,35,51,.18); }
.ba-persona-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: var(--ba-gradient); color: #fff; font-size: 1.4rem; margin-bottom: 1.25rem;
}
.ba-persona-card h3 { font-size: 1.2rem; margin-bottom: .6rem; }
.ba-persona-card p { color: var(--ba-ink-soft); font-size: .95rem; margin-bottom: 1.25rem; }
.ba-persona-card ul { list-style: none; padding: 0; margin: 0; font-size: .9rem; color: var(--ba-ink-soft); }
.ba-persona-card ul li { padding-left: 1.4rem; position: relative; margin-bottom: .5rem; }
.ba-persona-card ul li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  color: var(--ba-teal); font-weight: 700;
}

/* Feature grid */
.ba-feature-card {
  height: 100%;
  padding: 1.75rem;
  border-radius: var(--ba-radius);
  background: #fff;
  border: 1px solid var(--ba-border);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.ba-feature-card:hover { transform: translateY(-3px); box-shadow: 0 18px 36px -18px rgba(27,35,51,.16); border-color: transparent; }
.ba-feature-icon {
  width: 46px; height: 46px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; margin-bottom: 1rem;
  background: var(--ba-bg-soft);
}
.ba-feature-card h3 { font-size: 1.05rem; margin-bottom: .5rem; }
.ba-feature-card p { color: var(--ba-ink-soft); font-size: .9rem; margin: 0; }

/* Trust / Bulut Enerji band */
.ba-trust {
  border-radius: 24px;
  background: var(--ba-blue-dark);
  background-image: radial-gradient(circle at 15% 20%, rgba(232,64,127,.35), transparent 45%), radial-gradient(circle at 85% 80%, rgba(38,169,123,.35), transparent 45%);
  color: #fff;
  padding: 3.5rem;
}
.ba-trust h2 { color: #fff; font-size: clamp(1.5rem, 2.6vw, 2rem); }
.ba-trust p { color: rgba(255,255,255,.78); font-size: 1rem; }
.ba-trust .ba-stat .label { color: rgba(255,255,255,.7); }
.ba-trust .ba-stat .num { background: none; -webkit-text-fill-color: initial; color: #fff; }

/* Mobile app section */
.ba-app-mock {
  background: #fff;
  border-radius: 28px;
  border: 1px solid var(--ba-border);
  box-shadow: 0 30px 60px -20px rgba(27,35,51,.15);
  padding: 1.25rem;
  max-width: 300px;
  margin: 0 auto;
}
.ba-app-mock .screen {
  border-radius: 20px;
  background: var(--ba-gradient);
  aspect-ratio: 9/16;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.25rem;
  color: #fff;
}
.ba-app-mock .screen .card {
  background: rgba(255,255,255,.15);
  backdrop-filter: blur(6px);
  border-radius: 14px;
  padding: 1rem;
  margin-bottom: .75rem;
}
.ba-app-mock .screen .card small { opacity: .85; }
.ba-app-mock .screen .card strong { display: block; font-size: 1.3rem; }

.ba-app-check { list-style: none; padding: 0; margin: 0 0 2rem; }
.ba-app-check li { padding-left: 1.6rem; position: relative; margin-bottom: .9rem; color: var(--ba-ink-soft); }
.ba-app-check li::before { content: "✓"; position: absolute; left: 0; color: var(--ba-teal); font-weight: 700; }

/* FAQ */
.accordion-item { border: 1px solid var(--ba-border); border-radius: 12px !important; margin-bottom: .75rem; overflow: hidden; }
.accordion-button { font-weight: 600; color: var(--ba-ink); }
.accordion-button:not(.collapsed) { background: var(--ba-bg-soft); color: var(--ba-blue); box-shadow: none; }
.accordion-button:focus { box-shadow: none; }

/* Closing CTA */
.ba-cta {
  border-radius: 24px;
  background: var(--ba-gradient);
  color: #fff;
  padding: 4rem 3rem;
  text-align: center;
}
.ba-cta h2 { color: #fff; font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 1rem; }
.ba-cta p { color: rgba(255,255,255,.9); font-size: 1.05rem; margin-bottom: 2rem; }

/* Footer */
.ba-footer { background: var(--ba-ink); color: rgba(255,255,255,.7); padding: 4rem 0 1.5rem; }
.ba-footer-logo { height: 30px; filter: brightness(0) invert(1); margin-bottom: 1rem; }
.ba-footer-text { font-size: .9rem; max-width: 320px; }
.ba-footer h6 { color: #fff; font-size: .88rem; text-transform: uppercase; letter-spacing: .04em; margin-bottom: 1rem; }
.ba-footer-links { list-style: none; padding: 0; margin: 0; font-size: .9rem; }
.ba-footer-links li { margin-bottom: .65rem; }
.ba-footer-links a { color: rgba(255,255,255,.7); }
.ba-footer-links a:hover { color: #fff; }
.ba-footer-divider { border-color: rgba(255,255,255,.12); margin: 2.5rem 0 1.5rem; }
.ba-footer-bottom { font-size: .82rem; color: rgba(255,255,255,.5); }

/* Contact page */
.ba-contact-card {
  border-radius: var(--ba-radius);
  border: 1px solid var(--ba-border);
  padding: 2.5rem;
  background: #fff;
}
.ba-contact-info {
  border-radius: var(--ba-radius);
  background: var(--ba-blue-dark);
  color: #fff;
  padding: 2.5rem;
  height: 100%;
}
.ba-contact-info h3 { color: #fff; }
.ba-contact-info ul { list-style: none; padding: 0; margin: 1.5rem 0 0; }
.ba-contact-info li { margin-bottom: 1.25rem; font-size: .95rem; color: rgba(255,255,255,.85); }
.ba-contact-info li strong { display: block; color: #fff; margin-bottom: .2rem; }

@media (max-width: 991.98px) {
  .ba-hero { padding: 3rem 0 4rem; text-align: center; }
  .ba-hero-lead { margin-left: auto; margin-right: auto; }
  .ba-hero-actions { justify-content: center; }
  .ba-hero-visual { margin-top: 3rem; }
  .ba-trust { padding: 2.5rem 1.5rem; }
  .ba-cta { padding: 3rem 1.5rem; }
}