:root{--primary:#1D4ED8;--primary-dark:#1E40AF;--primary-light:#DBEAFE;--accent:#0D9488;--accent-light:#CCFBF1;--warning:#F59E0B;--warning-light:#FEF3C7;--success:#10B981;--success-light:#D1FAE5;--danger:#EF4444;--danger-light:#FEE2E2;--text-main:#0F172A;--text-muted:#64748B;--bg-page:#F8FAFC;--bg-card:#FFFFFF;--border-color:#E2E8F0;--shadow-sm:0 1px 3px rgba(0,0,0,0.05);--shadow-md:0 4px 12px rgba(15,23,42,0.08);--shadow-lg:0 10px 25px rgba(15,23,42,0.12);--radius-sm:8px;--radius-md:12px;--radius-lg:18px;--radius-full:9999px}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Poppins',sans-serif;background-color:var(--bg-page);color:var(--text-main);line-height:1.6;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:all .2s ease}
button{cursor:pointer;font-family:inherit;border:none;outline:none}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
.header-public{background:#ffffff;border-bottom:1px solid var(--border-color);position:sticky;top:0;z-index:1000;box-shadow:var(--shadow-sm)}
.header-wrapper{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand-link{display:flex;align-items:center;gap:12px}
.brand-logo{width:46px;height:46px;object-fit:contain}
.brand-title{font-size:18px;font-weight:700;color:var(--primary-dark);line-height:1.2}
.brand-subtitle{font-size:12px;color:var(--text-muted);font-weight:500}
.nav-menu{display:flex;align-items:center;gap:24px;list-style:none}
.nav-link{font-size:14px;font-weight:600;color:var(--text-main);padding:8px 12px;border-radius:var(--radius-sm);transition:all .2s ease}
.nav-link:hover,.nav-link.active{color:var(--primary);background:var(--primary-light)}
.btn-admin-link{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;background:var(--primary);color:#ffffff;font-size:13px;font-weight:600;border-radius:var(--radius-full);box-shadow:0 2px 8px rgba(37,99,235,0.25);transition:all .2s ease}
.btn-admin-link:hover{background:var(--primary-dark);transform:translateY(-1px)}
.mobile-toggle{display:none;background:transparent;font-size:24px;color:var(--text-main)}
.hero-section{background:linear-gradient(135deg,#1E40AF 0%,#2563EB 50%,#0D9488 100%);color:#ffffff;padding:60px 0;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
.hero-content > *{min-width:0}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;background:rgba(255,255,255,0.15);backdrop-filter:blur(8px);border-radius:var(--radius-full);font-size:13px;font-weight:600;margin-bottom:16px}
.hero-title{font-size:38px;font-weight:800;line-height:1.2;margin-bottom:16px}
.hero-desc{font-size:15px;color:rgba(255,255,255,0.9);margin-bottom:24px;max-width:540px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.btn-hero-primary{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;background:#ffffff;color:var(--primary-dark);font-size:14px;font-weight:700;border-radius:var(--radius-md);box-shadow:var(--shadow-md);transition:all .2s ease}
.btn-hero-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn-hero-secondary{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;background:rgba(255,255,255,0.15);backdrop-filter:blur(6px);color:#ffffff;border:1px solid rgba(255,255,255,0.3);font-size:14px;font-weight:600;border-radius:var(--radius-md);transition:all .2s ease}
.btn-hero-secondary:hover{background:rgba(255,255,255,0.25)}
.hero-stat-card{background:rgba(255,255,255,0.95);backdrop-filter:blur(10px);color:var(--text-main);padding:28px;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}
.hero-stat-title{font-size:16px;font-weight:700;margin-bottom:18px;color:var(--primary-dark);display:flex;align-items:center;gap:8px}
.hero-stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.stat-item{padding:14px;background:var(--bg-page);border-radius:var(--radius-md);border:1px solid var(--border-color)}
.stat-num{font-size:26px;font-weight:800;color:var(--primary);line-height:1}
.stat-label{font-size:12px;color:var(--text-muted);font-weight:600;margin-top:4px}
.section{padding:50px 0}
.section-header{text-align:center;max-width:680px;margin:0 auto 36px}
.section-tag{display:inline-block;font-size:12px;font-weight:700;color:var(--primary);text-transform:uppercase;letter-spacing:1px;margin-bottom:8px}
.section-title{font-size:28px;font-weight:800;color:var(--text-main);margin-bottom:10px}
.section-desc{font-size:14px;color:var(--text-muted)}
.search-box-card{background:#ffffff;padding:24px;border-radius:var(--radius-lg);border:1px solid var(--border-color);box-shadow:var(--shadow-md);margin-bottom:32px}
.search-row{display:flex;gap:12px;flex-wrap:wrap}
.search-input-wrap{flex:1;min-width:260px;position:relative}
.search-input-wrap i{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--text-muted);font-size:18px}
.search-input{width:100%;height:48px;padding:10px 16px 10px 48px;border:1px solid var(--border-color);border-radius:var(--radius-md);font-size:14px;color:var(--text-main);transition:all .2s ease}
.search-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,0.15)}
.category-filter{height:48px;padding:0 16px;border:1px solid var(--border-color);border-radius:var(--radius-md);font-size:14px;color:var(--text-main);background:#ffffff}
.category-pills{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.pill-btn{padding:6px 14px;border-radius:var(--radius-full);background:var(--bg-page);border:1px solid var(--border-color);font-size:12px;font-weight:600;color:var(--text-muted);transition:all .2s ease}
.pill-btn:hover,.pill-btn.active{background:var(--primary);color:#ffffff;border-color:var(--primary)}
.books-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px}
.books-grid > *{min-width:0}
.book-card{background:#ffffff;border-radius:var(--radius-lg);border:1px solid var(--border-color);box-shadow:var(--shadow-sm);overflow:hidden;display:flex;flex-direction:column;transition:all .25s ease}
.book-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--primary-light)}
.book-cover-wrap{position:relative;height:180px;background:linear-gradient(135deg,#DBEAFE,#EFF6FF);display:flex;align-items:center;justify-content:center;overflow:hidden}
.book-cover-img{width:100%;height:100%;object-fit:cover}
.book-cover-placeholder{font-size:48px;color:var(--primary)}
.badge-ebook{position:absolute;top:10px;left:10px;padding:4px 10px;border-radius:var(--radius-full);background:var(--accent);color:#ffffff;font-size:11px;font-weight:700;display:inline-flex;align-items:center;gap:4px}
.badge-shelf{position:absolute;bottom:10px;right:10px;padding:4px 8px;border-radius:var(--radius-sm);background:rgba(15,23,42,0.75);backdrop-filter:blur(4px);color:#ffffff;font-size:11px;font-weight:600}
.book-body{padding:18px;display:flex;flex-direction:column;flex:1}
.book-category{font-size:11px;font-weight:700;color:var(--primary);text-transform:uppercase;margin-bottom:6px}
.book-title{font-size:15px;font-weight:700;color:var(--text-main);line-height:1.3;margin-bottom:6px;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.book-author{font-size:12px;color:var(--text-muted);margin-bottom:12px}
.book-footer{margin-top:auto;padding-top:12px;border-top:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}
.stock-indicator{font-size:11px;font-weight:600;display:inline-flex;align-items:center;gap:6px}
.stock-dot{width:8px;height:8px;border-radius:50%}
.stock-dot.avail{background:var(--success)}
.stock-dot.empty{background:var(--danger)}
.btn-view-book{padding:6px 12px;background:var(--primary-light);color:var(--primary-dark);border-radius:var(--radius-sm);font-size:12px;font-weight:600;transition:all .2s ease}
.btn-view-book:hover{background:var(--primary);color:#ffffff}
.guestbook-card,.donation-card{background:#ffffff;border-radius:var(--radius-lg);border:1px solid var(--border-color);box-shadow:var(--shadow-md);padding:32px;max-width:760px;margin:0 auto}
.form-group{margin-bottom:18px}
.form-label{display:block;font-size:13px;font-weight:600;color:var(--text-main);margin-bottom:6px}
.form-control{width:100%;height:44px;padding:8px 14px;border:1px solid var(--border-color);border-radius:var(--radius-md);font-size:14px;color:var(--text-main);transition:all .2s ease}
.form-control:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,0.15)}
textarea.form-control{height:auto;padding:10px 14px}
.form-row{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.form-row > *{min-width:0}
.btn-submit{display:inline-flex;align-items:center;justify-content:center;gap:8px;width:100%;height:46px;background:var(--primary);color:#ffffff;font-size:14px;font-weight:700;border-radius:var(--radius-md);box-shadow:var(--shadow-sm);transition:all .2s ease}
.btn-submit:hover{background:var(--primary-dark);box-shadow:var(--shadow-md)}
.donation-tabs{display:flex;gap:12px;margin-bottom:24px;border-bottom:1px solid var(--border-color);padding-bottom:12px}
.donation-tab-btn{padding:8px 18px;border-radius:var(--radius-full);background:var(--bg-page);border:1px solid var(--border-color);font-size:13px;font-weight:600;color:var(--text-muted);transition:all .2s ease}
.donation-tab-btn.active{background:var(--primary);color:#ffffff;border-color:var(--primary)}
.bank-box{background:var(--primary-light);border:1px solid rgba(37,99,235,0.2);padding:18px;border-radius:var(--radius-md);margin-bottom:20px}
.bank-name{font-size:13px;font-weight:700;color:var(--primary-dark)}
.bank-num{font-size:18px;font-weight:800;color:var(--text-main);letter-spacing:1px;margin:4px 0}
.bank-holder{font-size:12px;color:var(--text-muted)}
.footer-public{background:#0F172A;color:#94A3B8;padding:40px 0 24px;margin-top:60px}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(2,1fr);gap:40px;margin-bottom:32px}
.footer-grid > *{min-width:0}
.footer-brand-title{font-size:16px;font-weight:700;color:#ffffff;margin-bottom:8px}
.footer-desc{font-size:13px;line-height:1.6}
.footer-col-title{font-size:14px;font-weight:700;color:#ffffff;margin-bottom:14px}
.footer-links{list-style:none}
.footer-links li{margin-bottom:8px}
.footer-links a{font-size:13px;color:#94A3B8}
.footer-links a:hover{color:#ffffff}
.footer-bottom{padding-top:20px;border-top:1px solid #1E293B;text-align:center;font-size:12px}
.modal-overlay{position:fixed;inset:0;background:rgba(15,23,42,0.6);backdrop-filter:blur(4px);display:none;align-items:center;justify-content:center;z-index:9999;padding:20px}
.modal-overlay.active{display:flex}
.modal-card{background:#ffffff;border-radius:var(--radius-lg);width:100%;max-width:600px;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-lg);position:relative;padding:28px}
.modal-close{position:absolute;top:16px;right:16px;background:var(--bg-page);width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:16px;color:var(--text-muted)}
.modal-close:hover{background:var(--danger-light);color:var(--danger)}
.toast{position:fixed;bottom:24px;right:24px;background:#ffffff;padding:14px 20px;border-radius:var(--radius-md);box-shadow:var(--shadow-lg);border-left:4px solid var(--primary);font-size:14px;font-weight:600;display:flex;align-items:center;gap:10px;z-index:10000;transform:translateY(100px);opacity:0;transition:all .3s ease}
.toast.active{transform:translateY(0);opacity:1}
@media (max-width:768px){
.header-wrapper{height:60px}
.nav-menu{position:fixed;top:60px;left:0;right:0;background:#ffffff;flex-direction:column;align-items:flex-start;padding:20px;border-bottom:1px solid var(--border-color);box-shadow:var(--shadow-md);display:none}
.nav-menu.active{display:flex}
.mobile-toggle{display:block}
.hero-grid{grid-template-columns:1fr;gap:28px}
.hero-title{font-size:26px}
.form-row{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr;gap:24px}
}