:root {
    --bg-color: #FFFFFF;
    --text-color: #000000;
    --secondary-text: #444444;
    --border-color: #E0E0E0;
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Inter', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { background: var(--bg-color); color: var(--text-color); font-family: var(--font-sans); line-height: 1.6; -webkit-font-smoothing: antialiased; scroll-behavior: smooth; }
body.no-scroll { overflow: hidden; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }

.navbar { display: flex; justify-content: space-between; align-items: center; padding: 1.5rem 4rem; position: fixed; width: 100%; background: #FFF; border-bottom: 1px solid var(--border-color); z-index: 1000; }
.logo-container { text-decoration: none; color: inherit; }
.logo-text { font-family: var(--font-serif); font-weight: 700; font-size: 1.4rem; letter-spacing: -0.5px; }
.logo-text .thin { font-weight: 400; font-style: italic; }

.lang-toggle button { background: none; border: none; font-size: 0.7rem; cursor: pointer; color: #999; padding: 0 8px; font-weight: 600; transition: color 0.3s; }
.lang-toggle button.active { color: #000; text-decoration: underline; }

.hero { padding: 14rem 0 8rem; min-height: 80vh; display: flex; align-items: center; }
.hero-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 4rem; align-items: center; }
.hero h1 { font-family: var(--font-serif); font-size: 3.8rem; font-weight: 400; margin-bottom: 2.5rem; line-height: 1.1; }
.hero h1 .italic { font-style: italic; }
.hero-subtitle { font-size: 1.4rem; color: var(--secondary-text); max-width: 750px; margin-bottom: 3.5rem; font-weight: 300; }

.cta-matrix { display: flex; gap: 20px; }
.cta-col { display: flex; flex-direction: column; gap: 15px; }
.btn-primary, .btn-secondary, .btn-outline { padding: 1.1rem 2.2rem; font-size: 0.85rem; font-weight: 600; cursor: pointer; border: none; font-family: var(--font-sans); transition: all 0.3s; text-decoration: none; display: inline-block; text-align: center; min-width: 280px; }
.btn-primary { background: #000; color: #FFF; }
.btn-secondary { background: transparent; border: 1px solid #000; color: #000; }
.btn-outline { background: transparent; border: 1px solid #E0E0E0; color: #666; }
.btn-primary:hover { opacity: 0.8; transform: translateY(-2px); }
.btn-secondary:hover { background: #F5F5F5; transform: translateY(-2px); }
.btn-outline:hover { border-color: #000; color: #000; transform: translateY(-2px); }

.product-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 4rem; align-items: center; }
.problem-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 4rem; align-items: center; }

.image-slot {
    background: #F9F9F9;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}
.image-slot.small { min-height: 250px; margin-top: 2rem; }
.image-slot.tiny { min-height: 180px; margin-top: 1.5rem; }
.image-slot img { width: 100%; height: 100%; object-fit: cover; position: absolute; top: 0; left: 0; }
.placeholder-label { font-size: 0.6rem; color: #CCC; text-transform: uppercase; letter-spacing: 2px; z-index: 1; }

section { padding: 8rem 0; border-bottom: 1px solid var(--border-color); }
.section-title { font-family: var(--font-serif); font-size: 2.5rem; font-weight: 400; margin-bottom: 2.5rem; }
.pillar-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3rem; }
.pillar h3 { font-family: var(--font-serif); font-size: 1.6rem; margin-bottom: 1.2rem; font-weight: 400; }

.curriculum { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; margin-top: 3rem; }
.week-item { padding: 2rem; background: #FAFAFA; border: 1px solid var(--border-color); display: flex; flex-direction: column; cursor: pointer; transition: transform 0.3s, border-color 0.3s; }
.week-item:hover { transform: translateY(-5px); border-color: #000; }
.week-header { font-size: 0.7rem; font-weight: 700; color: #999; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 0.5rem; }
.week-content { flex-grow: 1; font-weight: 600; }
.expand-hint { font-size: 0.65rem; color: #AAA; margin-top: 1rem; text-transform: uppercase; letter-spacing: 1px; }

.overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: #FFF; z-index: 2000; display: none; overflow-y: auto; padding: 4rem 0; }
.overlay.active { display: block; }
.overlay-content { max-width: 1000px; margin: 0 auto; padding: 0 2rem; }
.close-overlay { background: none; border: none; font-family: var(--font-sans); font-weight: 600; cursor: pointer; margin-bottom: 3rem; font-size: 0.9rem; }
.overlay-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; margin-top: 3rem; }
.overlay-text { font-size: 1.1rem; line-height: 1.8; }
.overlay-image img { width: 100%; height: auto; border: 1px solid var(--border-color); }

.footer { padding: 6rem 0; background: #FFF; }
.central-message { font-family: var(--font-serif); font-size: 2.2rem; text-align: center; font-style: italic; margin-bottom: 4rem; font-weight: 400; }
.footer-bottom { display: flex; justify-content: center; border-top: 1px solid var(--border-color); padding-top: 3rem; align-items: center; }

@media (max-width: 992px) {
    .hero-grid, .product-grid, .problem-grid, .overlay-grid { grid-template-columns: 1fr; }
    .cta-matrix { flex-direction: column; }
    .pillar-grid, .curriculum { grid-template-columns: 1fr; }
}