*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--qoi-font-body); color: var(--qoi-text-main); background-color: var(--qoi-bg-body); line-height: 1.65; }
h1, h2, h3, h4 { font-family: var(--qoi-font-heading); color: var(--qoi-primary-dark); margin-bottom: 12px; }
a { color: var(--qoi-primary); text-decoration: none; }
.qoi-container { width: 100%; max-width: var(--qoi-container-max); margin: 0 auto; padding: 0 20px; }
.qoi-container-narrow { max-width: 800px; }
.qoi-section { padding: 70px 0; }
.bg-alt { background: var(--qoi-bg-alt); }
.bg-surface { background: var(--qoi-bg-surface); }
.text-center { text-align: center; }
.qoi-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 24px; font-weight: 600; border-radius: var(--qoi-radius-full); cursor: pointer; border: 1px solid transparent; }
.qoi-btn-primary { background: var(--qoi-primary); color: #fff; }
.qoi-btn-secondary { background: var(--qoi-secondary); color: #fff; }
.qoi-btn-outline { border-color: var(--qoi-primary); color: var(--qoi-primary); background: transparent; }
.qoi-btn-lg { padding: 16px 32px; font-size: 1.05rem; }
.w-full { width: 100%; }
.qoi-announcement-bar { background: var(--qoi-primary-dark); color: #fff; padding: 8px 0; font-size: 0.85rem; }
.qoi-announcement-inner { display: flex; justify-content: space-between; }
.qoi-announcement-link { color: var(--qoi-secondary); }
.qoi-nav-wrapper { background: #fff; border-bottom: 1px solid var(--qoi-border); position: sticky; top: 0; z-index: 100; }
.qoi-nav-container { display: flex; justify-content: space-between; align-items: center; height: 80px; }
.qoi-nav-menu { display: flex; list-style: none; gap: 24px; }
.qoi-header-cta-group { display: flex; align-items: center; gap: 16px; }
.qoi-mobile-toggle { display: none; background: none; border: none; flex-direction: column; gap: 4px; cursor: pointer; }
.qoi-mobile-toggle span { width: 22px; height: 2px; background: #333; }
.qoi-mobile-drawer { display: none; }
.qoi-hero-section { padding: 80px 0; background: linear-gradient(180deg, #F4EFEA 0%, var(--qoi-bg-body) 100%); }
.qoi-hero-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 40px; align-items: center; }
.qoi-badge-pill { display: inline-block; background: #E8F3ED; color: var(--qoi-primary); padding: 6px 14px; border-radius: var(--qoi-radius-full); font-size: 0.85rem; font-weight: 600; margin-bottom: 16px; }
.qoi-hero-title { font-size: 2.8rem; }
.qoi-hero-lead { font-size: 1.15rem; color: var(--qoi-text-muted); margin-bottom: 24px; }
.qoi-hero-actions { display: flex; gap: 16px; }
.qoi-hero-placeholder-art { background: #fff; border-radius: var(--qoi-radius-lg); padding: 50px 30px; text-align: center; box-shadow: var(--qoi-shadow-lg); }
.qoi-trust-strip { background: #fff; border-top: 1px solid var(--qoi-border); border-bottom: 1px solid var(--qoi-border); padding: 30px 0; }
.qoi-trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.qoi-trust-item { display: flex; gap: 12px; }
.qoi-trust-icon { font-size: 1.8rem; }
.qoi-cards-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.qoi-card { background: #fff; border-radius: var(--qoi-radius-md); border: 1px solid var(--qoi-border); overflow: hidden; display: flex; flex-direction: column; }
.qoi-card-body { padding: 20px; flex: 1; }
.qoi-card-placeholder-img { height: 180px; background: var(--qoi-bg-alt); display: flex; align-items: center; justify-content: center; font-size: 2.5rem; }
.qoi-card-footer { padding: 14px 20px; border-top: 1px solid var(--qoi-border); display: flex; justify-content: space-between; align-items: center; background: #FAFAF7; }
.qoi-teacher-avatar-wrap { padding: 20px 0 0; }
.qoi-teacher-avatar { width: 100px; height: 100px; border-radius: 50%; object-fit: cover; margin: 0 auto; }
.qoi-avatar-placeholder { font-size: 3rem; }
.qoi-who-grid, .qoi-steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.qoi-steps-grid { grid-template-columns: repeat(4, 1fr); }
.qoi-who-card, .qoi-step-card { background: #fff; padding: 30px 20px; border-radius: var(--qoi-radius-md); border: 1px solid var(--qoi-border); text-align: center; }
.step-num { font-size: 2rem; font-weight: 700; color: var(--qoi-secondary); opacity: 0.5; margin-bottom: 8px; }
.qoi-pricing-card { background: #fff; border-radius: var(--qoi-radius-lg); border: 1px solid var(--qoi-border); padding: 36px 24px; display: flex; flex-direction: column; text-align: center; }
.qoi-pricing-card.is-recommended { border-color: var(--qoi-primary); box-shadow: var(--qoi-shadow-lg); }
.price-val { font-size: 2.2rem; font-weight: 700; margin: 12px 0; color: var(--qoi-primary-dark); }
.qoi-plan-features { list-style: none; margin: 20px 0; text-align: left; flex: 1; }
.qoi-plan-features li { margin-bottom: 8px; }
.qoi-accordion { border-top: 1px solid var(--qoi-border); }
.qoi-accordion-item { border-bottom: 1px solid var(--qoi-border); }
.qoi-accordion-trigger { width: 100%; padding: 18px 0; display: flex; justify-content: space-between; background: none; border: none; font-size: 1.05rem; font-weight: 600; cursor: pointer; text-align: left; }
.qoi-accordion-body { padding-bottom: 16px; color: var(--qoi-text-muted); }
.qoi-final-cta-section { padding: 40px 0 70px; }
.qoi-final-cta-box { background: var(--qoi-primary-dark); color: #fff; border-radius: var(--qoi-radius-lg); padding: 50px 30px; text-align: center; }
.qoi-final-cta-box h2 { color: #fff; margin-bottom: 12px; }
.qoi-final-cta-box p { color: #E8F3ED; margin-bottom: 24px; }
.qoi-form-group { margin-bottom: 16px; }
.qoi-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.qoi-form label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; }
.qoi-form input, .qoi-form select, .qoi-form textarea { width: 100%; padding: 10px 14px; border: 1px solid var(--qoi-border); border-radius: var(--qoi-radius-sm); font-size: 0.95rem; }
.qoi-response-box { margin-top: 14px; padding: 12px; border-radius: 4px; }
.qoi-response-box.success { background: #D1E7DD; color: #0F5132; }
.qoi-response-box.error { background: #F8D7DA; color: #842029; }
.qoi-site-footer { background: #1B201E; color: #B0B7B3; padding: 50px 0 20px; font-size: 0.9rem; }
.qoi-footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 30px; margin-bottom: 40px; }
.qoi-footer-top h3, .qoi-footer-top h4 { color: #fff; }
.qoi-footer-top ul { list-style: none; }
.qoi-footer-top a { color: #B0B7B3; }
.qoi-breadcrumbs-nav { padding: 12px 0; background: var(--qoi-bg-alt); font-size: 0.85rem; }
.qoi-breadcrumbs { display: flex; list-style: none; gap: 8px; }
.qoi-course-hero { padding: 40px 0; background: var(--qoi-secondary-light); }
.qoi-course-hero-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 30px; }
.qoi-course-body-layout { display: grid; grid-template-columns: 2fr 1fr; gap: 40px; padding: 50px 20px; }
.qoi-sidebar-card { background: #fff; padding: 24px; border-radius: var(--qoi-radius-md); border: 1px solid var(--qoi-border); }
.qoi-sidebar-features { list-style: none; margin: 16px 0; }
.qoi-sidebar-features li { margin-bottom: 8px; }
@media (max-width: 900px) {
  .qoi-hero-grid, .qoi-course-hero-grid, .qoi-course-body-layout, .qoi-cards-grid, .qoi-who-grid, .qoi-steps-grid, .qoi-footer-grid, .qoi-trust-grid { grid-template-columns: 1fr; }
  .qoi-primary-nav { display: none; }
  .qoi-mobile-toggle { display: flex; }
  .qoi-mobile-drawer[aria-hidden="false"] { display: block; padding: 20px 0; }
  .qoi-form-row { grid-template-columns: 1fr; }
}