*{margin:0;padding:0;box-sizing:border-box}
body{font-family:system-ui,-apple-system,sans-serif;background:#0f172a;color:#e2e8f0;min-height:100vh;display:flex;align-items:center;justify-content:center}
.login-container{width:100%;max-width:420px;padding:40px;background:#1e293b;border-radius:16px;border:1px solid #334155;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.login-container h1{text-align:center;color:#f97316;margin-bottom:8px;font-size:1.6rem}
.login-container p.sub{text-align:center;color:#94a3b8;margin-bottom:28px;font-size:.9rem}
.field{margin-bottom:16px}
.field label{display:block;color:#94a3b8;margin-bottom:6px;font-size:.85rem;font-weight:600}
.field input{width:100%;padding:12px 16px;background:#0f172a;border:1px solid #475569;border-radius:8px;color:#e2e8f0;font-size:1rem;transition:border-color .2s}
.field input:focus{outline:none;border-color:#f97316}
.btn-login{width:100%;padding:14px;background:linear-gradient(135deg,#f97316,#fb923c);color:#fff;border:none;border-radius:8px;font-size:1.05rem;cursor:pointer;font-weight:700;transition:opacity .2s}
.btn-login:hover{opacity:.9}
.btn-login:disabled{opacity:.5;cursor:not-allowed}
.error-msg{background:#ef444422;color:#ef4444;border:1px solid #ef444444;padding:10px;border-radius:8px;margin-bottom:16px;display:none;text-align:center;font-size:.9rem}
.spinner{display:inline-block;width:18px;height:18px;border:2px solid #fff4;border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.reader-body{display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;min-height:100vh;background:#0f172a}
.reader-topbar{background:#1e293b;padding:12px 24px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #334155;position:sticky;top:0;z-index:100}
.reader-topbar h1{color:#f97316;font-size:1.1rem}
.reader-topbar .info{color:#94a3b8;font-size:.85rem}
.reader-topbar button{padding:6px 14px;background:#ef4444;color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:.85rem}
.reader-select{max-width:600px;margin:40px auto;padding:20px}
.reader-select h2{color:#f97316;margin-bottom:20px;text-align:center}
.ebook-card{background:#1e293b;border:1px solid #334155;border-radius:12px;padding:20px;margin-bottom:16px;cursor:pointer;transition:border-color .2s}
.ebook-card:hover{border-color:#f97316}
.ebook-card h3{color:#e2e8f0;margin-bottom:6px}
.ebook-card p{color:#94a3b8;font-size:.9rem}
.reader-content{max-width:900px;margin:0 auto;padding:30px 24px;width:100%}
.reader-content h1,.reader-content h2,.reader-content h3{color:#f97316;margin:20px 0 12px}
.reader-content p{line-height:1.8;margin-bottom:14px;color:#cbd5e1}
.reader-content table{width:100%;border-collapse:collapse;margin:16px 0}
.reader-content th,.reader-content td{padding:10px;border:1px solid #334155;text-align:left}
.reader-content th{background:#1e293b;color:#f97316}
.reader-content ul,.reader-content ol{margin:12px 0 12px 24px}
.reader-content li{margin-bottom:6px;line-height:1.6}
.reader-content img{max-width:100%;border-radius:8px;margin:16px 0}
.bonus-locked{background:#f9731622;border:2px dashed #f97316;border-radius:12px;padding:30px;text-align:center;margin:30px 0}
.bonus-locked h3{color:#f97316;margin-bottom:10px}
.bonus-locked p{color:#94a3b8}
.bonus-unlocked{background:#22c55e22;border:2px solid #22c55e44;border-radius:12px;padding:30px;margin:30px 0}
.bonus-unlocked h3{color:#22c55e;margin-bottom:10px}
.back-btn{display:inline-block;margin:20px 0;padding:10px 20px;background:#475569;color:#e2e8f0;border:none;border-radius:8px;cursor:pointer;font-size:.9rem}
.back-btn:hover{background:#64748b}