/*
 * Messenger Chat Widget v4.0 - demo landing page.
 * Colours and fonts come from theme.css.
 */

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: color-mix(in srgb, var(--cs-surface) 86%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--cs-border);
}

.navbar-brand { font-family: var(--cs-font-heading); font-weight: 800; color: var(--cs-text); }
.navbar .nav-link { color: var(--cs-muted); font-weight: 500; }
.navbar .nav-link:hover { color: var(--cs-text); }

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 11px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: linear-gradient(135deg, var(--cs-primary), var(--cs-accent));
}

.eyebrow {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(var(--cs-primary-rgb), 0.12);
  color: var(--cs-link);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* Hero */
.hero {
  padding: 72px 0 88px;
  background:
    radial-gradient(900px 420px at 95% -10%, rgba(var(--cs-primary-rgb), 0.16), transparent 60%),
    radial-gradient(700px 380px at -10% 20%, rgba(20, 184, 166, 0.12), transparent 60%);
}

.hero h1 { font-size: clamp(2rem, 4.6vw, 3.25rem); line-height: 1.12; }

.hero-points li { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; color: var(--cs-text); }
.hero-points i { color: var(--cs-success); }

/* Hero mock-up */
.mock { position: relative; max-width: 460px; margin: 0 auto; padding: 24px 0 40px; }

.mock-window {
  border-radius: 20px;
  background: var(--cs-card);
  border: 1px solid var(--cs-border);
  box-shadow: 0 30px 70px rgba(15, 23, 42, 0.2);
  overflow: hidden;
}

.mock-head {
  padding: 18px;
  color: #fff;
  background: linear-gradient(135deg, var(--cs-primary), var(--cs-primary-dark));
}

.mock-head small { display: flex; align-items: center; gap: 6px; opacity: 0.92; }
.mock-dot { width: 8px; height: 8px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.3); }
.mock-body { padding: 18px; }
.mock-line { height: 10px; border-radius: 6px; background: var(--cs-border); margin-bottom: 14px; }
.mock-field { height: 38px; border-radius: 10px; border: 1px solid var(--cs-border); background: var(--cs-surface); margin-bottom: 12px; }
.mock-field.tall { height: 72px; }
.mock-btn { height: 42px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-weight: 700; color: #fff; background: var(--cs-primary); }

.mock-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 14px;
  background: var(--cs-card);
  border: 1px solid var(--cs-border);
  box-shadow: var(--cs-shadow);
  font-size: 0.875rem;
}

.mock-card small { display: block; color: var(--cs-muted); }
.mock-inbox { top: 0; right: -6px; }
.mock-mail { bottom: 6px; left: -6px; }

.mock-icon {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(var(--cs-primary-rgb), 0.14);
  color: var(--cs-link);
}

.mock-icon.accent { background: rgba(20, 184, 166, 0.16); color: var(--cs-accent); }

/* Sections */
.section { padding: 88px 0; }
.section-alt { background: var(--cs-card); border-block: 1px solid var(--cs-border); }
.section-head { max-width: 640px; margin: 0 auto 48px; text-align: center; }
.section-head h2 { margin-top: 14px; font-size: clamp(1.6rem, 3vw, 2.2rem); }

.feature-card {
  height: 100%;
  padding: 26px;
  border-radius: var(--cs-radius-lg);
  background: var(--cs-card);
  border: 1px solid var(--cs-border);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover { transform: translateY(-4px); box-shadow: var(--cs-shadow); border-color: rgba(var(--cs-primary-rgb), 0.4); }
.feature-card h3 { font-size: 1.05rem; margin: 16px 0 8px; }
.feature-card p { margin: 0; color: var(--cs-muted); font-size: 0.9rem; }

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  color: var(--cs-link);
  background: rgba(var(--cs-primary-rgb), 0.12);
}

.step-card { height: 100%; padding: 28px; border-radius: var(--cs-radius-lg); background: var(--cs-surface); border: 1px solid var(--cs-border); }
.step-card h3 { font-size: 1.15rem; margin: 16px 0 8px; }

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: var(--cs-font-heading);
  font-weight: 800;
  background: var(--cs-primary);
}

/* Code window */
.code-window { position: relative; border-radius: 16px; overflow: hidden; background: #0b1120; box-shadow: var(--cs-shadow); }
.code-bar { display: flex; align-items: center; gap: 7px; padding: 12px 16px; background: #111a2e; }
.code-bar span { width: 11px; height: 11px; border-radius: 50%; background: #334155; }
.code-bar small { margin-left: 10px; color: #94a3b8; }
.code-body { margin: 0; padding: 22px 20px 26px; color: #c7d2fe; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.85rem; white-space: pre-wrap; word-break: break-all; }
.code-copy { position: absolute; top: 8px; right: 12px; }

.cta {
  padding: 72px 0;
  color: #fff;
  background: linear-gradient(135deg, var(--cs-primary), var(--cs-primary-dark) 60%, #0f766e);
}

.cta h2 { color: #fff; }
.cta p { color: rgba(255, 255, 255, 0.85); }

.site-footer { padding: 28px 0; color: var(--cs-muted); font-size: 0.875rem; }

@media (max-width: 991.98px) {
  .hero { padding: 48px 0 56px; }
  .section { padding: 60px 0; }
  .mock-inbox { right: 0; }
  .mock-mail { left: 0; }
}