:root { --brand: #1b76d2; --brand-dark: #1260ab; --brand-light: #e8f2fc; }
body { font-family: 'Inter', sans-serif; color: #1e293b; }

/* Navbar */
.navbar { background: rgba(255,255,255,0.9); backdrop-filter: blur(12px); border-bottom: 1px solid rgba(0,0,0,0.06); }
.navbar-brand { font-weight: 800; font-size: 1.4rem; color: var(--brand) !important; display: flex; align-items: center; gap: 10px; }
.navbar-brand img { width: 36px; height: 36px; border-radius: 8px; }

/* Language switcher */
.lang-switcher { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.lang-btn { border: 1px solid #dee2e6; border-radius: 8px; padding: 4px 10px; font-size: 0.8rem; font-weight: 500; background: #fff; color: #475569; transition: all 0.2s; text-decoration: none; display: inline-flex; align-items: center; gap: 5px; line-height: 1; }
.lang-btn:hover { border-color: var(--brand); color: var(--brand); background: var(--brand-light); }
.lang-btn.active { border-color: var(--brand); color: #fff; background: var(--brand); pointer-events: none; }
.lang-btn .flag { font-size: 1rem; }

/* Hero */
.hero { background: linear-gradient(135deg, #f0f7ff 0%, #e0ecff 50%, #f5f0ff 100%); padding: 100px 0 80px; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -60%; right: -20%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(27,118,210,0.08) 0%, transparent 70%); border-radius: 50%; }
.hero::after { content: ''; position: absolute; bottom: -40%; left: -10%; width: 500px; height: 500px; background: radial-gradient(circle, rgba(107,33,168,0.06) 0%, transparent 70%); border-radius: 50%; }
.hero-content { position: relative; z-index: 1; }
.hero .app-icon { width: 100px; height: 100px; border-radius: 24px; box-shadow: 0 12px 40px rgba(27,118,210,0.2); }
.hero h1 { font-size: 3rem; font-weight: 800; letter-spacing: -0.03em; margin: 20px 0 8px; background: linear-gradient(135deg, var(--brand) 0%, #4f46e5 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero .tagline { font-size: 1.25rem; color: #475569; margin-bottom: 36px; font-weight: 400; }

/* Store buttons */
.store-btn { display: inline-flex; align-items: center; gap: 10px; background: #0f172a; color: #fff; padding: 14px 28px; border-radius: 14px; text-decoration: none; font-weight: 600; font-size: 0.95rem; transition: all 0.2s; border: 2px solid transparent; }
.store-btn:hover { background: #1e293b; color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.15); }
.store-btn i { font-size: 1.6rem; }
.store-btn .btn-label { text-align: left; line-height: 1.3; }
.store-btn .btn-label small { font-size: 0.7rem; font-weight: 400; opacity: 0.8; display: block; }

/* Features */
.features-section { padding: 80px 0; background: #fff; }
.feature-card { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 20px; padding: 36px 28px; text-align: center; height: 100%; transition: all 0.25s; }
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,0.08); border-color: var(--brand-light); }
.feature-icon { width: 64px; height: 64px; border-radius: 16px; display: inline-flex; align-items: center; justify-content: center; font-size: 1.6rem; margin-bottom: 20px; }
.feature-icon.blue { background: #dbeafe; color: #2563eb; }
.feature-icon.green { background: #dcfce7; color: #16a34a; }
.feature-icon.orange { background: #fef3c7; color: #d97706; }
.feature-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; color: #0f172a; }
.feature-card p { font-size: 0.95rem; color: #64748b; margin: 0; line-height: 1.6; }

/* FAQ */
.faq-section { padding: 80px 0; background: #f8fafc; }
.faq-section h2 { font-size: 2rem; font-weight: 800; text-align: center; margin-bottom: 40px; color: #0f172a; }
.accordion-item { border: 1px solid #e2e8f0 !important; border-radius: 14px !important; margin-bottom: 12px; overflow: hidden; background: #fff; }
.accordion-button { font-weight: 600; font-size: 1rem; color: #1e293b; padding: 18px 24px; background: #fff; box-shadow: none !important; }
.accordion-button:not(.collapsed) { background: var(--brand-light); color: var(--brand-dark); }
.accordion-button::after { background-size: 1rem; }
.accordion-body { padding: 4px 24px 20px; color: #475569; font-size: 0.95rem; line-height: 1.7; }
.accordion-body code { background: #f1f5f9; padding: 2px 8px; border-radius: 6px; font-size: 0.85rem; color: #be185d; }
.accordion-body a { color: var(--brand); font-weight: 500; }
.accordion-body ol, .accordion-body ul { padding-left: 20px; margin: 10px 0; }
.accordion-body li { margin: 6px 0; }

/* Footer */
.footer { padding: 40px 0; border-top: 1px solid #e2e8f0; background: #fff; }
.footer a { color: var(--brand); text-decoration: none; font-weight: 500; }
.footer a:hover { text-decoration: underline; }

@media (max-width: 576px) {
  .hero { padding: 80px 0 60px; }
  .hero h1 { font-size: 2.2rem; }
  .hero .tagline { font-size: 1.05rem; }
  .store-btn { width: 100%; justify-content: center; }
  .lang-switcher { gap: 4px; }
  .lang-btn { padding: 3px 7px; font-size: 0.75rem; }
}