:root{--primary-color:#4f46e5;--primary-dark:#4338ca;--secondary-color:#ec4899;--bg-color:#f3f4f6;--card-bg:#fff;--text-main:#1f2937;--text-secondary:#6b7280;--border-color:#e5e7eb;--nav-height:70px}*{margin:0;padding:0;box-sizing:border-box;font-family:Inter,sans-serif;-webkit-tap-highlight-color:transparent}body{background-color:var(--bg-color);color:var(--text-main);min-height:100vh}.view,body{display:flex;flex-direction:column}.view{width:100%;height:100%;overflow-y:auto;padding:20px 20px 90px;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.btn-primary{width:100%;padding:16px;background-color:var(--primary-color);color:#fff;border:none;border-radius:12px;font-size:1rem;font-weight:600;cursor:pointer;box-shadow:0 4px 6px -1px rgba(79,70,229,.3);transition:transform .1s}.btn-primary:active{transform:scale(.98)}.form-group{margin-bottom:20px}.form-label{display:block;margin-bottom:8px;font-weight:500;color:var(--text-secondary);font-size:.9rem}.form-input{width:100%;padding:14px;border:1px solid var(--border-color);border-radius:12px;font-size:1rem;background:var(--card-bg)}.form-input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px rgba(79,70,229,.1)}.note-card{background:#fff;border-radius:16px;padding:16px;margin-bottom:16px;box-shadow:0 2px 8px rgba(0,0,0,.04);gap:16px}.file-icon,.note-card{display:flex;align-items:center}.file-icon{width:50px;height:50px;background:#eff6ff;color:var(--primary-color);border-radius:12px;justify-content:center;font-size:1.5rem}.file-icon.pdf{color:#dc2626;background:#fef2f2}.file-icon.docx{color:#2563eb;background:#eff6ff}.card-content{flex:1 1}.card-content h3{font-size:1rem;font-weight:600;margin-bottom:4px}.card-meta{font-size:.8rem;display:flex;align-items:center;gap:10px}.card-meta,.download-btn{color:var(--text-secondary)}.download-btn{font-size:1.1rem;cursor:pointer}.auth-container{display:flex;flex-direction:column;justify-content:center;height:100%;max-width:400px;margin:0 auto;width:100%}.logo-area{text-align:center;margin-bottom:40px}.logo-icon{font-size:3rem;color:var(--primary-color);margin-bottom:10px}.app-name{font-size:1.8rem;font-weight:700;color:var(--text-main)}.auth-link{text-align:center;margin-top:20px;color:var(--text-secondary);font-size:.9rem}.auth-link span{color:var(--primary-color);font-weight:600;cursor:pointer}.home-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;padding-top:10px}.welcome-text h1{font-size:1.5rem;font-weight:700}.welcome-text p{color:var(--text-secondary);font-size:.9rem}.notification-btn{background:#fff;border:none;width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 4px rgba(0,0,0,.05);position:relative}.notification-badge{position:absolute;top:10px;right:10px;width:8px;height:8px;background:var(--secondary-color);border-radius:50%}.search-bar{background:#fff;padding:12px 16px;border-radius:12px;display:flex;align-items:center;box-shadow:0 2px 4px rgba(0,0,0,.03);margin-bottom:24px}.search-bar input{border:none;width:100%;font-size:1rem;outline:none;margin-left:10px}.categories-scroll{display:flex;gap:12px;overflow-x:auto;padding-bottom:10px;margin-bottom:20px;scrollbar-width:none}.category-pill{background:#fff;padding:8px 16px;border-radius:20px;white-space:nowrap;font-size:.9rem;font-weight:500;color:var(--text-secondary);border:1px solid var(--border-color)}.category-pill.active{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}.section-title{font-size:1.1rem;font-weight:700;margin-bottom:12px;display:flex;justify-content:space-between;align-items:center}.section-title a{font-size:.85rem;color:var(--primary-color);text-decoration:none}.upload-header{display:flex;align-items:center;margin-bottom:25px}.back-btn{font-size:1.2rem;color:var(--text-main);margin-right:15px;cursor:pointer}.upload-title{font-size:1.4rem;font-weight:700}.file-upload-area{border:2px dashed var(--primary-color);background-color:#eef2ff;border-radius:16px;padding:30px;text-align:center;margin-bottom:25px;cursor:pointer;transition:all .3s}.file-upload-area:active{background-color:#e0e7ff}.upload-icon{font-size:2.5rem;margin-bottom:10px}.upload-icon,.upload-text{color:var(--primary-color)}.upload-text{font-weight:600}.upload-subtext{font-size:.85rem;color:var(--text-secondary);margin-top:5px}.profile-header{display:flex;flex-direction:column;align-items:center;background:#fff;padding:30px 20px;border-radius:20px;box-shadow:0 4px 15px rgba(0,0,0,.03);margin-bottom:20px}.profile-img-container{position:relative;margin-bottom:15px}.profile-img{width:100px;height:100px;border-radius:50%;object-fit:cover;border:4px solid #eef2ff}.profile-badge{position:absolute;bottom:0;right:0;background:var(--primary-color);color:#fff;font-size:.7rem;padding:4px 8px;border-radius:10px;border:2px solid #fff}.profile-name{font-size:1.3rem;font-weight:700;margin-bottom:5px}.profile-uni{color:var(--text-secondary);font-size:.9rem;margin-bottom:20px}.stats-row{display:flex;justify-content:space-around;width:100%;border-top:1px solid #f3f4f6;padding-top:20px}.stat-item{text-align:center}.stat-val{font-size:1.1rem;font-weight:700;color:var(--text-main);display:block}.stat-label{font-size:.8rem;color:var(--text-secondary)}.settings-list{background:#fff;border-radius:16px;padding:10px}.setting-item{display:flex;justify-content:space-between;align-items:center;padding:15px;border-bottom:1px solid #f3f4f6;cursor:pointer}.setting-item:last-child{border-bottom:none}.setting-left{display:flex;align-items:center;gap:12px;font-weight:500}.setting-left i{width:20px;color:var(--text-secondary)}.setting-arrow{color:#d1d5db}.logout-text{color:#dc2626!important}.bottom-nav{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);width:90%;max-width:380px;height:70px;background:hsla(0,0%,100%,.85);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-radius:24px;justify-content:space-evenly;box-shadow:0 10px 40px -10px rgba(0,0,0,.1),inset 0 0 0 1px hsla(0,0%,100%,.5);z-index:1000;padding:0 10px}.bottom-nav,.nav-item{display:flex;align-items:center}.nav-item{flex-direction:column;justify-content:center;color:#9ca3af;width:50px;height:50px;border-radius:16px;cursor:pointer;text-decoration:none;transition:all .2s ease;position:relative}.nav-item i{font-size:1.3rem;transition:transform .2s,color .2s}.nav-item span{font-size:.7rem;font-weight:600;margin-top:4px;opacity:0;height:0;overflow:hidden;transition:all .2s}.nav-item.active{color:var(--text-main);background:#fff;box-shadow:0 4px 12px rgba(0,0,0,.05)}.nav-item.active i{color:var(--text-main);transform:translateY(0)}.nav-fab-container{display:flex;align-items:center;justify-content:center;width:60px}.nav-fab-link{text-decoration:none}.fab-btn{width:54px;height:54px;background:#111827;border-radius:18px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.4rem;box-shadow:0 8px 20px rgba(17,24,39,.3);transition:transform .2s,box-shadow .2s;border:2px solid #fff}.fab-btn:active{transform:scale(.92)}.fab-btn i{transition:transform .2s}.nav-fab-link:hover .fab-btn i{transform:rotate(90deg)}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:rgba(156,163,175,.3);border-radius:10px}::-webkit-scrollbar-thumb:hover{background:hsla(220,9%,46%,.5)}