*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--primary:#13213E;--primary-dark:#0D1730;--primary-mid:#1E3260;--primary-light:#E8EEF8;--accent:#F47C20;--accent-dark:#D96A10;--muted-blue:#7B9EC0;--text:#13213E;--text-muted:#5A7FA6;--bg:#F4F6FA;--bg-card:#fff;--border:#D8E3EF;--success:#10B981;--error:#EF4444;--radius:12px;--shadow:0 4px 20px rgba(19,33,62,.08);--sidebar-w:240px}html{scroll-behavior:smooth}body{font-family:Inter,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:inherit;border:none;outline:none}input,textarea,select{font-family:inherit;outline:none}img{max-width:100%;display:block}.container{max-width:1100px;margin:0 auto;padding:0 24px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;border-radius:var(--radius);font-size:15px;font-weight:600;transition:all .2s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-mid);transform:translateY(-1px)}.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}.btn-outline:hover{background:var(--primary-light)}.btn-accent{background:var(--accent);color:#fff}.btn-accent:hover{background:var(--accent-dark);transform:translateY(-1px)}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.card{background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.badge{display:inline-block;padding:4px 12px;border-radius:50px;font-size:13px;font-weight:600}.badge-success{background:#d1fae5;color:#065f46}.badge-warning{background:#fef3c7;color:#92400e}.badge-error{background:#fee2e2;color:#991b1b}.alert{padding:12px 16px;border-radius:8px;font-size:14px;margin-bottom:16px}.alert-error{background:#fee2e2;color:#991b1b;border:1px solid #FECACA}.alert-success{background:#d1fae5;color:#065f46;border:1px solid #A7F3D0}.spinner{width:40px;height:40px;border:4px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;margin:40px auto}@keyframes spin{to{transform:rotate(360deg)}}@keyframes toast-in{0%{opacity:0;transform:translate(24px)}to{opacity:1;transform:translate(0)}}.form-group{margin-bottom:20px}.form-group label{display:block;font-size:14px;font-weight:600;color:var(--text-muted);margin-bottom:8px}.form-group input,.form-group textarea,.form-group select{width:100%;padding:12px 16px;border:1.5px solid var(--border);border-radius:8px;font-size:15px;transition:border-color .2s;background:#fff}.form-group input:focus,.form-group textarea:focus,.form-group select:focus{border-color:var(--accent);box-shadow:0 0 0 3px #f47c201f}.ebooks-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:28px}.table-responsive{overflow-x:auto;-webkit-overflow-scrolling:touch}.nav-links-desktop{display:flex;align-items:center;gap:24px}.nav-hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;background:none;border:none;cursor:pointer;padding:4px}.nav-hamburger span{display:block;height:2px;background:var(--primary);border-radius:2px;transition:all .25s}.nav-mobile-menu{display:none}.sidebar-overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;z-index:199}.sidebar-toggle{display:none;position:fixed;bottom:20px;right:20px;z-index:201;width:48px;height:48px;border-radius:50%;background:var(--accent);color:#fff;font-size:20px;align-items:center;justify-content:center;box-shadow:0 4px 16px #f47c2066}@media (max-width:768px){.container{padding:0 16px}.ebooks-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}.nav-links-desktop{display:none!important}.nav-hamburger{display:flex}.nav-mobile-menu{display:flex;flex-direction:column;gap:0;position:fixed;top:0;right:0;bottom:0;width:280px;background:#fff;z-index:300;padding:24px 0;box-shadow:-4px 0 24px #13213e26;transform:translate(100%);transition:transform .3s ease;overflow-y:auto}.nav-mobile-menu.open{transform:translate(0)}.nav-mobile-overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;z-index:299}.nav-mobile-overlay.open,.sidebar-overlay{display:block}.sidebar-toggle{display:flex}.layout-sidebar{position:fixed!important;top:0;left:0;bottom:0;transform:translate(-100%);transition:transform .3s ease;z-index:200}.layout-sidebar.open{transform:translate(0)}.layout-main{margin-left:0!important;padding:20px 16px!important}.modal-inner{padding:20px!important}.form-grid-2{grid-template-columns:1fr!important}.page-section{padding-top:32px!important;padding-bottom:32px!important}.hero-graphic{display:none}.hero-content{max-width:100%!important}.hero-inner{flex-direction:column!important;padding:40px 16px!important;gap:24px!important}.hero-h1{font-size:28px!important}.stats-grid{grid-template-columns:1fr 1fr!important}.split-grid{grid-template-columns:1fr!important}.table-responsive{border-radius:var(--radius)}.table-responsive table{min-width:520px}.table-responsive th,.table-responsive td{padding:10px 12px!important;font-size:13px!important}.detail-grid,.dash-grid{grid-template-columns:1fr!important}}@media (max-width:480px){.ebooks-grid{grid-template-columns:1fr}.btn{padding:10px 20px;font-size:14px}.stats-grid{grid-template-columns:1fr!important}.hero-h1{font-size:24px!important}.table-responsive th,.table-responsive td{padding:8px 10px!important;font-size:12px!important}}