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:root{--primary-color:#1da1f2;--secondary-color:#262626;--bg-color:#121212;--text-color:#e0e0e0;--card-bg:#1a1a1a;--border-color:#2f2f2f;--shadow-dark:0 4px 10px #00000080}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-color);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5}.container{align-items:flex-start;gap:24px;max-width:1200px;min-height:100vh;margin:0 auto;padding:20px;display:flex}.card{background:var(--card-bg);box-shadow:var(--shadow-dark);border:1px solid var(--border-color);border-radius:16px;margin-bottom:20px;padding:24px}.sidebar{background:var(--card-bg);width:250px;height:fit-content;box-shadow:var(--shadow-dark);border-radius:20px;padding:24px;position:sticky;top:32px}.sidebar-nav-item button{text-align:left;width:100%;color:var(--text-color);cursor:pointer;background:0 0;border:none;border-radius:12px;align-items:center;gap:10px;padding:12px;font-weight:700;transition:background-color .2s,color .2s;display:flex}.sidebar-nav-item button:hover{color:var(--primary-color);background-color:#ffffff0d}.sidebar-nav-item button.active{color:var(--primary-color);background-color:#1da1f21a}.sidebar .logo{color:var(--primary-color);margin-bottom:24px;font-size:28px;font-weight:700}.main-content{flex:1}.post-input-container{gap:16px;display:flex}.post-input-avatar{background:#3b82f6;border-radius:50%;flex-shrink:0;width:48px;height:48px}.post-textarea{resize:none;width:100%;height:60px;color:var(--text-color);background-color:#0000;border:none;outline:none;font-size:16px}.post-form-footer{border-top:1px solid var(--border-color);justify-content:space-between;align-items:center;margin-top:16px;padding-top:16px;display:flex}.post-type-select{border:1px solid var(--border-color);background:var(--secondary-color);color:var(--text-color);box-shadow:var(--shadow-dark);border-radius:10px;padding:8px 12px;font-size:14px}.btn-post{background:var(--primary-color);color:#fff;cursor:pointer;box-shadow:var(--shadow-dark);border:none;border-radius:9999px;padding:10px 28px;font-weight:700;transition:transform .2s ease-in-out}.btn-post:hover{transform:translateY(-2px);box-shadow:0 6px 15px #000000b3}.post-actions{border-top:1px solid var(--border-color);gap:20px;margin-top:16px;padding-top:16px;padding-left:52px;display:flex}.post-actions button{cursor:pointer;color:#8899a6;background:0 0;border:none;align-items:center;gap:8px;font-size:14px;font-weight:600;transition:color .2s;display:flex}.post-actions button:hover{color:var(--primary-color)}.post-actions button.liked{color:#e0245e}.badge{color:#fff;box-shadow:var(--shadow-dark);border-radius:16px;padding:6px 14px;font-size:12px;font-weight:700}.badge-q{background:#17bf63}.badge-n{background:#e0245e}.badge-t{background:#ffad1f}.text-input,.textarea-input,.select-input{border:1px solid var(--border-color);background-color:var(--secondary-color);width:100%;color:var(--text-color);border-radius:10px;padding:12px;font-size:14px;box-shadow:inset 0 1px 2px #0000004d}.text-input:focus,.textarea-input:focus,.select-input:focus{border-color:var(--primary-color);outline:none;box-shadow:inset 0 1px 2px #0000004d,0 0 0 3px #1da1f233}.comment-area{background:var(--secondary-color);color:var(--text-color);border-radius:12px;margin-bottom:8px;padding:12px;font-size:14px;box-shadow:inset 0 1px 2px #0003}.comment-input-area{border-top:1px solid var(--border-color);paddingTop:16px;margin-top:16px;padding-left:52px}.btn-comment-action{cursor:pointer;box-shadow:var(--shadow-dark);border:none;border-radius:9999px;padding:6px 16px;font-size:13px;font-weight:700;transition:transform .1s ease-in-out}.btn-comment-action:hover{transform:translateY(-1px)}.btn-comment-close{color:#e0e0e0;background:#333}.btn-comment-send{background:var(--primary-color);color:#fff}.profile-card-header{color:#8899a6;text-transform:uppercase;margin-bottom:16px;font-size:12px;font-weight:700}.profile-avatar-gradient{background:linear-gradient(to top right,#4ade80,#3b82f6);border-radius:50%;width:48px;height:48px}.profile-stats-container{text-align:center;background:var(--secondary-color);color:var(--text-color);border-radius:12px;justify-content:space-between;padding:16px 12px;display:flex;box-shadow:inset 0 1px 2px #0003}.profile-stat-item{font-size:18px;font-weight:700}.profile-stat-label{color:#8899a6;font-size:12px}.welcome-card{background:var(--primary-color);box-shadow:var(--shadow-dark);color:#fff;border-radius:16px;padding:24px}.welcome-card h3{margin-bottom:8px;font-size:18px;font-weight:700}.welcome-card p{opacity:.9;margin-bottom:16px;font-size:14px;line-height:1.6}.welcome-card-button{width:100%;color:var(--primary-color);cursor:pointer;box-shadow:var(--shadow-dark);background:#fff;border:none;border-radius:10px;padding:10px;font-size:14px;font-weight:700;transition:transform .2s ease-in-out}.welcome-card-button:hover{transform:translateY(-2px);box-shadow:0 6px 15px #000000b3}.material-card{box-shadow:var(--shadow-dark);color:var(--text-color);padding:0;position:relative;overflow:hidden}.material-card-image-placeholder{alignItems:center;justifyContent:center;background:#333;flex-direction:column;height:120px;display:flex;position:relative}.material-card-image-placeholder a{alignItems:center;justifyContent:center;opacity:0;color:#fff;background:#000000b3;border-radius:16px 16px 0 0;font-weight:700;text-decoration:none;transition:opacity .2s;display:flex;position:absolute;inset:0}.material-card-image-placeholder a:hover{opacity:1}.material-card-content{background-color:var(--card-bg);padding:16px}.material-card-title{text-overflow:ellipsis;white-space:nowrap;margin-bottom:4px;font-size:16px;font-weight:700;overflow:hidden}.material-card-meta{color:#8899a6;font-size:12px}.material-delete-btn{color:#e0245e;cursor:pointer;background:0 0;border:none;margin-top:8px;font-size:12px}.mobile-header{background:var(--card-bg);height:60px;box-shadow:var(--shadow-dark);z-index:50;border-bottom:1px solid var(--border-color);border-radius:0 0 16px 16px;justify-content:space-between;align-items:center;padding:0 16px;display:flex;position:fixed;top:0;left:0;right:0}.mobile-header .logo{color:var(--primary-color);font-size:20px;font-weight:700}.mobile-header .tutorial-btn{color:var(--primary-color);box-shadow:var(--shadow-dark);background:#1da1f21a;border:none;border-radius:9999px;padding:4px 12px;font-size:12px;font-weight:700}.mobile-nav{background:var(--card-bg);height:60px;box-shadow:var(--shadow-dark);z-index:50;border-top:1px solid var(--border-color);border-radius:16px 16px 0 0;justify-content:space-around;align-items:center;padding-bottom:4px;display:flex;position:fixed;bottom:0;left:0;right:0}.mobile-nav button{color:#8899a6;background:0 0;border:none;font-size:24px;transition:color .2s}.mobile-nav button.active{color:var(--primary-color)}.flex{display:flex}.gap-4{gap:1rem}.p-6{padding:1.5rem}.w-full{width:100%}.text-center{text-align:center}.clear-both{clear:both}.float-right{float:right}@media (max-width:1279px){aside.hidden.xl\:block{display:none}}