:root{--bg-dark: #020617;--bg-card: #0f172a;--primary: #38bdf8;--secondary: #818cf8;--text-main: #f8fafc;--text-muted: #94a3b8;--accent-gradient: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);--glass: rgba(15, 23, 42, .6);--glass-border: rgba(255, 255, 255, .1);font-family:Inter,system-ui,-apple-system,sans-serif;line-height:1.6;color:var(--text-main);background-color:var(--bg-dark)}*{margin:0;padding:0;box-sizing:border-box}body{min-height:100vh;overflow-x:hidden;background:radial-gradient(circle at 50% 0%,#1e293b 0%,var(--bg-dark) 50%)}a{text-decoration:none;color:inherit;transition:opacity .2s}a:hover{opacity:.8}.container{max-width:1200px;margin:0 auto;padding:0 2rem}.section{padding:6rem 0}.glass-panel{background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:1rem}.btn{display:inline-block;padding:.8rem 2rem;border-radius:9999px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;transition:transform .2s,box-shadow .2s;border:none;cursor:pointer}.btn-primary{background:var(--accent-gradient);color:#fff;box-shadow:0 4px 20px #38bdf84d}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px #38bdf866}.btn-outline{background:transparent;border:2px solid var(--primary);color:var(--primary)}.btn-outline:hover{background:#38bdf81a}h1,h2,h3,h4{line-height:1.2;margin-bottom:1rem}h1{font-size:3.5rem;font-weight:800;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent}h2{font-size:2.5rem;text-align:center;margin-bottom:3rem}p{color:var(--text-muted);margin-bottom:1.5rem;font-size:1.125rem}.book-container{perspective:1000px;width:300px;height:450px;margin:0 auto}.book{width:100%;height:100%;position:relative;transform-style:preserve-3d;transform:rotateY(-25deg) rotateX(5deg);transition:transform .5s ease;box-shadow:20px 20px 50px #00000080}.book:hover{transform:rotateY(-15deg) rotateX(0)}.book-front{position:absolute;width:100%;height:100%;background-size:cover;background-position:center;border-radius:2px 5px 5px 2px;z-index:2}.book-side{position:absolute;top:0;left:0;width:50px;height:100%;background:#111;transform:rotateY(-90deg) translateZ(25px) translate(-25px);z-index:1;background:linear-gradient(90deg,#333,#111,#333)}.book-pages{position:absolute;top:5px;right:-10px;width:100%;height:calc(100% - 10px);background:#fff;transform:translateZ(-25px);border-radius:0 5px 5px 0;background:repeating-linear-gradient(90deg,#fff,#fff 2px,#eee 3px 4px)}nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:1rem 0;transition:background .3s}nav.scrolled{background:#020617cc;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--glass-border)}.nav-content{display:flex;justify-content:space-between;align-items:center}.logo{font-weight:800;font-size:1.5rem;color:var(--primary)}.nav-links{display:flex;gap:2rem}@keyframes float{0%{transform:translateY(0)}50%{transform:translateY(-20px)}to{transform:translateY(0)}}@media(max-width:768px){h1{font-size:2.5rem}.nav-links{display:none}.book-container{margin:2rem auto;width:200px;height:300px}}.author-card-container{height:100%;cursor:pointer;transition:transform .3s ease,border-color .3s ease;overflow:hidden;position:relative}.author-card-container:hover{transform:translateY(-5px);border-color:var(--primary)}.author-card-container img{transition:transform .5s ease}.author-card-container:hover img{transform:scale(1.1)}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#020617e6;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:1000;display:flex;justify-content:center;align-items:center;padding:2rem;opacity:0;animation:fadeIn .3s forwards}.modal-content{background:#0f172a;border:1px solid var(--primary);border-radius:1.5rem;max-width:800px;width:100%;max-height:90vh;overflow-y:auto;position:relative;transform:scale(.8);opacity:0;animation:zoomIn .4s cubic-bezier(.16,1,.3,1) forwards;box-shadow:0 0 50px #38bdf833}@keyframes fadeIn{to{opacity:1}}@keyframes zoomIn{to{transform:scale(1);opacity:1}}.modal-content::-webkit-scrollbar{width:8px}.modal-content::-webkit-scrollbar-track{background:#020617}.modal-content::-webkit-scrollbar-thumb{background:#334155;border-radius:4px}.modal-content::-webkit-scrollbar-thumb:hover{background:var(--primary)}.sample-modal-content{width:90%;height:90vh;max-width:1200px;background:#0f172a;border:1px solid var(--primary);border-radius:1rem;position:relative;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 0 50px #38bdf833;animation:zoomIn .3s cubic-bezier(.16,1,.3,1) forwards}.sample-modal-content iframe{width:100%;height:100%;border:none;background:#fff}.book-container{perspective:1000px;width:300px;height:450px;margin:0 auto;transform-style:preserve-3d}.book-wrapper-float{width:100%;height:100%;animation:float 6s ease-in-out infinite;transform-style:preserve-3d;perspective:1000px}.book{width:100%;height:100%;position:relative;transform-style:preserve-3d;transform:rotateY(-25deg) rotateX(5deg);transition:transform .8s cubic-bezier(.175,.885,.32,1.275);cursor:pointer}.book.flipped{transform:rotateY(-180deg) rotateX(0)}.book-front{position:absolute;width:100%;height:100%;background-size:cover;background-position:center;border-radius:2px 5px 5px 2px;z-index:2;-webkit-backface-visibility:hidden;backface-visibility:hidden}.book-back{position:absolute;width:100%;height:100%;background:#0f172a;border:2px solid #334155;border-radius:2px 5px 5px 2px;z-index:1;-webkit-backface-visibility:hidden;backface-visibility:hidden;transform:rotateY(180deg) translateZ(50px);display:flex;flex-direction:column;justify-content:center;align-items:center;padding:2rem;text-align:center;box-shadow:inset 0 0 20px #000c}.book-back h3{color:var(--primary);font-size:1.5rem}.book-back p{font-size:.9rem;line-height:1.5}.nav-btn-icon{display:flex;align-items:center;gap:.5rem;background:none;border:none;color:var(--text-muted);font-size:1rem;font-weight:500;cursor:pointer;transition:color .3s}.nav-btn-icon:hover,.nav-btn-icon.active{color:var(--primary)}.nav-btn-icon svg{color:var(--primary)}