:root{
  --navy:#0d1b3e; --navy2:#1a2a5e; --cyan:#00bcd4; --cyan-d:#0097a7;
  --grey:#6b7280; --line:#e8edf3; --bg:#ffffff;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Inter',system-ui,Arial,sans-serif;color:var(--navy);background:var(--bg);line-height:1.6}
a{color:inherit}
/* Header */
header{display:flex;align-items:center;justify-content:space-between;padding:1.1rem 5%;border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff;z-index:10}
.logo{display:flex;align-items:center;gap:.55rem;font-family:'Playfair Display',serif;font-size:1.5rem;font-weight:700;color:var(--navy);text-decoration:none}
.logo .ic{font-size:1.6rem}
nav{display:flex;align-items:center;gap:1.6rem}
nav a{text-decoration:none;font-weight:500;font-size:.95rem}
nav .home,nav .active{color:var(--cyan-d)}
nav .muted{color:var(--grey)}
/* Hero */
.hero{display:flex;align-items:center;gap:3rem;padding:4rem 5%;flex-wrap:wrap}
.hero-text{flex:1;min-width:280px}
.hero h1{font-family:'Playfair Display',serif;font-size:2.8rem;line-height:1.15;color:var(--navy);margin-bottom:1rem}
.hero p{color:var(--grey);font-size:1.05rem;max-width:440px;margin-bottom:1.8rem}
.search{display:flex;max-width:440px}
.search input{flex:1;border:1px solid var(--line);border-right:none;border-radius:10px 0 0 10px;padding:.8rem 1rem;font-size:.95rem;outline:none;font-family:'Inter'}
.search button{background:var(--cyan);border:none;border-radius:0 10px 10px 0;padding:0 1.1rem;cursor:pointer;font-size:1.1rem}
.hero-art{flex:1;min-width:260px;text-align:center;position:relative}
.hero-art .blob{position:absolute;right:-20px;top:-10px;width:200px;height:200px;border-radius:50%;background:#fef6d8;z-index:-1}
.hero-art .tri{position:absolute;left:-30px;bottom:10px;width:0;height:0;border-left:60px solid transparent;border-right:60px solid transparent;border-bottom:100px solid #e3f4f7;z-index:-1}
.book-stack{font-size:7rem;display:inline-block;transform:rotate(-3deg)}
/* Books section */
.section{padding:1rem 5% 4rem}
.section h2{font-family:'Playfair Display',serif;font-size:1.9rem;margin-bottom:.3rem}
.section .lead{color:var(--grey);margin-bottom:2rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1.6rem}
.book-card{border:1px solid var(--line);border-radius:14px;padding:1.6rem;transition:.2s;background:#fff;display:flex;flex-direction:column}
.book-card:hover{box-shadow:0 8px 24px rgba(13,27,62,.08);transform:translateY(-3px)}
.book-icon{font-size:2.2rem;margin-bottom:.6rem}
.book-card h3{font-family:'Playfair Display',serif;font-size:1.25rem;color:var(--navy);margin-bottom:.2rem}
.book-card .author{color:var(--cyan-d);font-size:.85rem;font-weight:600;margin-bottom:.7rem}
.book-card .desc{color:var(--grey);font-size:.9rem;margin-bottom:1.1rem;flex:1}
.btn{display:inline-block;background:var(--cyan);color:#fff;text-decoration:none;padding:.55rem 1.1rem;border-radius:8px;font-weight:600;font-size:.85rem;border:none;cursor:pointer;text-align:center}
.btn:hover{background:var(--cyan-d)}
.btn.ghost{background:#fff;color:var(--cyan-d);border:1px solid var(--cyan);margin-left:.5rem}
.btn-row{display:flex;gap:.5rem}
/* About */
.about-wrap{max-width:720px;margin:0 auto;padding:3rem 5%}
.about-wrap h1{font-family:'Playfair Display',serif;font-size:2.4rem;margin-bottom:1.2rem}
.about-wrap p{color:var(--grey);margin-bottom:1rem;font-size:1.05rem}
.yt-cta{background:linear-gradient(135deg,#0d1b3e,#1a2a5e);color:#fff;border-radius:16px;padding:2rem;margin-top:2rem;text-align:center}
.yt-cta h3{font-family:'Playfair Display',serif;font-size:1.6rem;margin-bottom:.8rem}
.yt-cta p{color:#cdd6e8;margin-bottom:1.2rem}
.yt-cta .btn{background:var(--cyan);font-size:1rem;padding:.7rem 1.6rem}
/* Modal */
.modal{display:none;position:fixed;inset:0;background:rgba(13,27,62,.55);z-index:100;padding:3%}
.modal.open{display:flex;align-items:center;justify-content:center}
.modal-box{background:#fff;border-radius:14px;width:min(820px,92vw);height:min(90vh,900px);display:flex;flex-direction:column;overflow:hidden}
.modal-head{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.3rem;border-bottom:1px solid var(--line)}
.modal-head h3{font-family:'Playfair Display',serif;font-size:1.2rem}
.modal-close{background:none;border:none;font-size:1.6rem;cursor:pointer;color:var(--grey)}
.modal iframe{flex:1;width:100%;border:none}
footer{text-align:center;padding:2.5rem 5%;color:var(--grey);font-size:.8rem;border-top:1px solid var(--line);margin-top:2rem}
@media(max-width:640px){.hero h1{font-size:2.1rem}.nav-mid{display:none}}