:root{--metu-red: #CC0000;--metu-red-light: #ff4040;--bg-primary: #06060e;--bg-secondary: #0d0d1a;--bg-tertiary: #13131f;--bg-card: rgba(19, 19, 31, .92);--bg-hover: rgba(255, 255, 255, .03);--bg-active: rgba(204, 0, 0, .07);--text-primary: #ececf4;--text-secondary: rgba(236, 236, 244, .52);--text-tertiary: rgba(236, 236, 244, .26);--text-accent: #ff4040;--border-color: rgba(255, 255, 255, .07);--border-hover: rgba(255, 255, 255, .14);--glass-bg: rgba(10, 10, 20, .72);--glass-border: rgba(255, 255, 255, .08);--glass-shadow: 0 16px 48px rgba(0, 0, 0, .55);--gradient-primary: linear-gradient(135deg, #e8291c, #ff6b5b);--gradient-gold: linear-gradient(135deg, #CFB53B, #E8D06F);--gradient-subtle: linear-gradient(135deg, rgba(232,41,28,.1), rgba(255,107,91,.05));--font-display: "Space Grotesk", -apple-system, sans-serif;--font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-xs: .69rem;--font-sm: .8rem;--font-base: .875rem;--font-md: .95rem;--font-lg: 1.1rem;--font-xl: 1.3rem;--font-2xl: 1.65rem;--font-3xl: 2.1rem;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 18px;--radius-xl: 24px;--radius-full: 9999px;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-base: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .4s cubic-bezier(.16, 1, .3, 1);--sidebar-width: 252px;--right-sidebar-width: 320px}[data-theme=light]{--bg-primary: #f2f2f6;--bg-secondary: #ffffff;--bg-tertiary: #eaeaf0;--bg-card: rgba(255, 255, 255, .92);--bg-hover: rgba(0, 0, 0, .03);--bg-active: rgba(204, 0, 0, .05);--text-primary: #0a0a18;--text-secondary: rgba(10, 10, 24, .52);--text-tertiary: rgba(10, 10, 24, .3);--border-color: rgba(0, 0, 0, .07);--border-hover: rgba(0, 0, 0, .14);--glass-bg: rgba(255, 255, 255, .82);--glass-border: rgba(0, 0, 0, .06);--glass-shadow: 0 8px 32px rgba(0, 0, 0, .08)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-family);background:var(--bg-primary);color:var(--text-primary);font-size:var(--font-base);line-height:1.6;overflow:hidden;height:100vh}a{color:var(--text-accent);text-decoration:none;transition:color var(--transition-fast)}a:hover{opacity:.8}input,textarea,select,button{font-family:inherit;font-size:inherit}img{max-width:100%;display:block}.hidden{display:none!important}::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:#ffffff26}.glass{background:var(--glass-bg);border:1px solid var(--glass-border);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);box-shadow:var(--glass-shadow)}.accent{color:var(--text-accent)}.skeleton{background:linear-gradient(90deg,var(--bg-tertiary) 25%,var(--bg-hover) 50%,var(--bg-tertiary) 75%);background-size:200% 100%;animation:shimmer 1.6s infinite;border-radius:var(--radius-sm);min-height:20px}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.screen{display:none}.screen.active{display:flex}@keyframes pageEnter{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.page-enter{animation:pageEnter .22s cubic-bezier(.16,1,.3,1) forwards}#auth-screen{min-height:100vh;background:var(--bg-primary);position:relative;overflow:auto}#auth-screen:before{content:"";position:fixed;top:-30%;left:-20%;width:60%;height:70%;background:radial-gradient(ellipse at center,rgba(232,41,28,.1) 0%,transparent 65%);pointer-events:none}#auth-screen:after{content:"";position:fixed;bottom:-20%;right:-10%;width:50%;height:60%;background:radial-gradient(ellipse at center,rgba(255,107,91,.06) 0%,transparent 65%);pointer-events:none}.auth-container{display:flex;min-height:100vh;width:100%;max-width:1120px;margin:0 auto;padding:var(--space-xl);gap:var(--space-2xl);align-items:center}.auth-left{flex:1;display:flex;flex-direction:column;gap:var(--space-2xl)}.auth-brand{display:flex;flex-direction:column;gap:var(--space-md)}.auth-logo{width:56px;height:56px;background:var(--gradient-primary);border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:30px;color:#fff;box-shadow:0 8px 24px #e8291c59}.auth-brand h1{font-family:var(--font-display);font-size:var(--font-3xl);font-weight:800;letter-spacing:-.04em;line-height:1}.auth-tagline{font-size:var(--font-lg);color:var(--text-secondary);max-width:340px;line-height:1.6}.auth-features{display:flex;flex-direction:column;gap:var(--space-md)}.feature-item{display:flex;align-items:center;gap:var(--space-md);color:var(--text-secondary);font-size:var(--font-base)}.feature-item .material-icons-round{color:var(--metu-red-light);font-size:22px}.auth-right{flex:1;max-width:420px;position:relative;z-index:1}.auth-card{padding:var(--space-xl);border-radius:var(--radius-xl);animation:pageEnter .45s cubic-bezier(.16,1,.3,1)}.auth-card h2{font-family:var(--font-display);font-size:var(--font-2xl);font-weight:700;letter-spacing:-.03em;margin-bottom:var(--space-xs)}.auth-subtitle{color:var(--text-secondary);margin-bottom:var(--space-lg);font-size:var(--font-sm)}.input-group{position:relative;margin-bottom:var(--space-md)}.input-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text-tertiary);font-size:18px;pointer-events:none}.input-group input,.input-group select{width:100%;padding:12px 14px 12px 44px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);transition:all var(--transition-fast);outline:none}.input-group select{appearance:none;cursor:pointer}.input-group input:focus,.input-group select:focus{border-color:#e8291c99;box-shadow:0 0 0 3px #e8291c1a;background:var(--bg-secondary)}.input-group input::placeholder{color:var(--text-tertiary)}.btn-primary{width:100%;padding:12px 22px;background:var(--gradient-primary);color:#fff;border:none;border-radius:var(--radius-md);font-family:var(--font-family);font-weight:600;font-size:var(--font-base);cursor:pointer;display:flex;align-items:center;justify-content:center;gap:var(--space-sm);transition:all var(--transition-base);box-shadow:0 4px 16px #e8291c40}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 8px 28px #e8291c61;opacity:.92}.btn-primary:active{transform:translateY(0)}.btn-primary.btn-sm{width:auto;padding:7px 18px;border-radius:var(--radius-full);font-size:var(--font-sm);box-shadow:0 2px 10px #e8291c33}.btn-google{width:100%;padding:12px 22px;background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-color);border-radius:var(--radius-md);font-weight:500;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:var(--space-sm);transition:all var(--transition-fast)}.btn-google:hover{background:var(--bg-hover);border-color:var(--border-hover)}.btn-icon{width:34px;height:34px;border-radius:var(--radius-full);border:none;background:transparent;color:var(--text-secondary);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--transition-fast);flex-shrink:0}.btn-icon:hover{background:var(--bg-hover);color:var(--text-primary)}.auth-divider{display:flex;align-items:center;gap:var(--space-md);margin:var(--space-lg) 0;color:var(--text-tertiary);font-size:var(--font-xs)}.auth-divider:before,.auth-divider:after{content:"";flex:1;height:1px;background:var(--border-color)}.auth-switch{text-align:center;margin-top:var(--space-md);color:var(--text-secondary);font-size:var(--font-sm)}#app-shell{height:100vh;display:flex;background:var(--bg-primary)}.sidebar{width:var(--sidebar-width);height:100vh;display:flex;flex-direction:column;padding:var(--space-lg) var(--space-sm);border-right:1px solid var(--border-color);flex-shrink:0;position:sticky;top:0;overflow-y:auto;background:var(--bg-secondary)}.sidebar-brand{display:flex;align-items:center;gap:10px;padding:var(--space-sm) var(--space-md);margin-bottom:var(--space-lg)}.sidebar-brand .material-icons-round{color:var(--metu-red-light);font-size:26px}.sidebar-brand h2{font-family:var(--font-display);font-size:var(--font-lg);font-weight:800;letter-spacing:-.035em}.nav-menu{list-style:none;display:flex;flex-direction:column;gap:2px;flex:1}.nav-item{display:flex;align-items:center;gap:12px;padding:10px var(--space-md);border-radius:var(--radius-md);cursor:pointer;color:var(--text-secondary);font-weight:500;font-size:var(--font-base);transition:all var(--transition-fast);position:relative;-webkit-user-select:none;user-select:none}.nav-item:hover{background:var(--bg-hover);color:var(--text-primary)}.nav-item.active{color:var(--text-primary);font-weight:600;background:var(--bg-active)}.nav-item.active 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img{width:100%;height:100%;object-fit:cover}.user-info-mini{display:flex;flex-direction:column;overflow:hidden;flex:1}.user-name-mini{font-weight:600;font-size:var(--font-sm);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.user-handle-mini{font-size:var(--font-xs);color:var(--text-tertiary)}.sidebar-dropdown{position:absolute;bottom:62px;left:0;right:0;border-radius:var(--radius-lg);padding:var(--space-xs);z-index:100;background:var(--bg-tertiary);border:1px solid var(--border-color);box-shadow:0 8px 24px #0006}.sidebar-dropdown button{width:100%;padding:9px var(--space-md);background:transparent;border:none;color:var(--text-primary);display:flex;align-items:center;gap:var(--space-sm);cursor:pointer;border-radius:var(--radius-sm);font-size:var(--font-sm);transition:background var(--transition-fast)}.sidebar-dropdown button:hover{background:var(--bg-hover)}.sidebar-dropdown button .material-icons-round{font-size:18px;color:var(--text-secondary)}.main-content{flex:1;height:100vh;overflow-y:auto;border-right:1px solid var(--border-color);min-width:0}.right-sidebar{width:var(--right-sidebar-width);height:100vh;overflow-y:auto;padding:var(--space-lg);display:flex;flex-direction:column;gap:var(--space-md);flex-shrink:0}.search-box{display:flex;align-items:center;gap:var(--space-sm);padding:9px 16px;border-radius:var(--radius-full);background:var(--bg-tertiary);border:1px solid var(--border-color)!important}.search-box .material-icons-round{color:var(--text-tertiary);font-size:18px}.search-box input{flex:1;background:transparent;border:none;color:var(--text-primary);outline:none;font-size:var(--font-sm)}.search-box input::placeholder{color:var(--text-tertiary)}.widget{border-radius:var(--radius-lg);padding:var(--space-md) var(--space-md);background:var(--bg-tertiary);border:1px solid var(--border-color)!important}.widget h3{font-family:var(--font-display);font-size:var(--font-base);font-weight:700;letter-spacing:-.02em;margin-bottom:var(--space-md)}.trending-list{display:flex;flex-direction:column}.trending-item{display:flex;flex-direction:column;gap:2px;padding:10px 0;border-bottom:1px solid var(--border-color);cursor:pointer;transition:padding-left var(--transition-fast)}.trending-item:last-child{border-bottom:none}.trending-item:hover{padding-left:4px}.trending-category{font-size:var(--font-xs);color:var(--text-tertiary)}.trending-tag{font-weight:700;font-size:var(--font-sm);font-family:var(--font-display)}.trending-count{font-size:var(--font-xs);color:var(--text-tertiary)}.follow-list{display:flex;flex-direction:column;gap:var(--space-sm)}.follow-item{display:flex;align-items:center;gap:var(--space-sm);min-height:44px}.follow-item .user-avatar-small{width:34px;height:34px}.follow-item .follow-info{flex:1;overflow:hidden}.follow-item .follow-name{font-weight:600;font-size:var(--font-sm);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.follow-item .follow-dept{font-size:var(--font-xs);color:var(--text-tertiary)}.follow-btn{padding:5px 14px;border-radius:var(--radius-full);border:1px solid var(--border-hover);background:transparent;color:var(--text-primary);font-weight:600;font-size:var(--font-xs);cursor:pointer;transition:all var(--transition-fast);white-space:nowrap}.follow-btn:hover{background:var(--text-primary);color:var(--bg-primary)}.follow-btn.following{background:transparent;border-color:var(--border-color);color:var(--text-secondary)}.widget-footer{display:flex;flex-wrap:wrap;gap:var(--space-sm);font-size:var(--font-xs);color:var(--text-tertiary);padding:var(--space-sm) 0 0}.widget-footer a{color:var(--text-tertiary)}.widget-footer a:hover{color:var(--text-secondary)}.mobile-nav{display:none;position:fixed;bottom:0;left:0;right:0;height:58px;background:var(--glass-bg);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border-top:1px solid var(--glass-border);justify-content:space-around;align-items:center;z-index:1000;padding:0 var(--space-sm)}.mobile-nav-item{border:none;background:transparent;color:var(--text-tertiary);display:flex;align-items:center;justify-content:center;width:46px;height:46px;border-radius:var(--radius-full);cursor:pointer;transition:all var(--transition-fast)}.mobile-nav-item.active{color:var(--text-primary)}.mobile-nav-item.active .material-icons-round{color:var(--metu-red-light)}.mobile-nav-item .material-icons-round{font-size:24px}.mobile-nav-item.fab{background:var(--gradient-primary);color:#fff;width:48px;height:48px;box-shadow:0 4px 16px #e8291c66;transform:translateY(-8px)}.mobile-nav-item.fab .material-icons-round{color:#fff}.page-header{position:sticky;top:0;z-index:50;padding:14px var(--space-lg);background:#06060ee0;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border-color)}[data-theme=light] .page-header{background:#f2f2f6e6}.page-header h1{font-family:var(--font-display);font-size:var(--font-xl);font-weight:700;letter-spacing:-.03em}.page-tabs{display:flex;border-bottom:1px solid var(--border-color)}.page-tab{flex:1;padding:12px;text-align:center;font-weight:500;color:var(--text-secondary);cursor:pointer;position:relative;transition:all var(--transition-fast);background:transparent;border:none;font-size:var(--font-sm)}.page-tab:hover{color:var(--text-primary);background:var(--bg-hover)}.page-tab.active{color:var(--text-primary);font-weight:600}.page-tab.active:after{content:"";position:absolute;bottom:0;left:50%;transform:translate(-50%);width:48px;height:2px;background:var(--gradient-primary);border-radius:var(--radius-full)}.compose-inline{display:flex;gap:var(--space-md);padding:var(--space-md) var(--space-lg);border-bottom:1px solid var(--border-color)}.compose-avatar-wrapper{flex-shrink:0}.compose-avatar{width:40px;height:40px;border-radius:var(--radius-full);background:var(--gradient-primary);display:flex;align-items:center;justify-content:center;color:#fff;overflow:hidden}.compose-avatar img{width:100%;height:100%;object-fit:cover}.compose-input-area{flex:1;display:flex;flex-direction:column;gap:var(--space-sm)}.compose-input-area textarea{width:100%;min-height:56px;background:transparent;border:none;color:var(--text-primary);resize:none;outline:none;font-size:var(--font-md);line-height:1.5;padding-top:var(--space-sm)}.compose-input-area textarea::placeholder{color:var(--text-tertiary)}.compose-toolbar{display:flex;align-items:center;justify-content:space-between;padding-top:var(--space-sm);border-top:1px solid var(--border-color)}.compose-toolbar-left{display:flex;gap:var(--space-xs)}.post-card{display:flex;gap:var(--space-md);padding:var(--space-md) var(--space-lg);border-bottom:1px solid var(--border-color);transition:background var(--transition-fast);cursor:pointer;position:relative;animation:fadeIn .25s ease-out}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.post-card:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--gradient-primary);opacity:0;transition:opacity var(--transition-fast)}.post-card:hover{background:var(--bg-hover)}.post-card:hover:before{opacity:1}.post-avatar{flex-shrink:0}.post-avatar .user-avatar-small{width:40px;height:40px}.post-body{flex:1;min-width:0}.post-header{display:flex;align-items:center;gap:var(--space-sm);flex-wrap:wrap}.post-author{font-weight:700;font-size:var(--font-sm);font-family:var(--font-display)}.post-handle,.post-time{color:var(--text-tertiary);font-size:var(--font-xs)}.post-time:before{content:"·";margin-right:4px}.post-dept-badge{font-size:var(--font-xs);padding:2px 8px;background:var(--gradient-subtle);border-radius:var(--radius-full);color:var(--metu-red-light);font-weight:600;border:1px solid rgba(232,41,28,.15)}.post-content{margin-top:var(--space-sm);line-height:1.65;word-wrap:break-word;white-space:pre-wrap;font-size:var(--font-base)}.post-content .hashtag,.post-content .mention{color:var(--metu-red-light);font-weight:500;cursor:pointer}.post-media{margin-top:var(--space-sm);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border-color)}.post-media img{width:100%;max-height:380px;object-fit:cover}.post-file-attachment{margin-top:var(--space-sm);display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);background:var(--bg-tertiary);border-radius:var(--radius-md);border:1px solid var(--border-color);cursor:pointer;transition:border-color var(--transition-fast)}.post-file-attachment:hover{border-color:var(--border-hover)}.post-file-attachment .material-icons-round{color:var(--metu-red-light)}.post-file-info{flex:1}.post-file-name{font-weight:600;font-size:var(--font-sm)}.post-file-size{font-size:var(--font-xs);color:var(--text-tertiary)}.post-actions{display:flex;gap:var(--space-sm);margin-top:var(--space-sm)}.post-action{display:flex;align-items:center;gap:4px;color:var(--text-tertiary);font-size:var(--font-xs);cursor:pointer;padding:5px 8px;border-radius:var(--radius-full);border:none;background:none;transition:all var(--transition-fast)}.post-action:hover{background:var(--bg-hover)}.post-action.comment:hover{color:#4d9de0}.post-action.like:hover,.post-action.like.liked{color:#f9427a}.post-action.bookmark:hover,.post-action.bookmark.saved{color:#4d9de0}.post-action .material-icons-round{font-size:17px}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#000000b8;display:flex;align-items:flex-start;justify-content:center;padding-top:8vh;z-index:2000;animation:fadeIn .18s 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var(--border-color)}.compose-actions{display:flex;gap:var(--space-xs)}.char-count{font-size:var(--font-xs);color:var(--text-tertiary)}.compose-preview{margin-top:var(--space-md);border-radius:var(--radius-md);overflow:hidden;position:relative}.compose-preview img{width:100%;max-height:200px;object-fit:cover;border-radius:var(--radius-md)}.compose-preview .remove-preview{position:absolute;top:8px;right:8px;width:26px;height:26px;background:#000000bf;border:none;border-radius:var(--radius-full);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center}.profile-header{position:relative}.profile-cover{height:180px;background:var(--gradient-subtle);position:relative;overflow:hidden}.profile-cover:after{content:"";position:absolute;bottom:0;left:0;right:0;height:80px;background:linear-gradient(transparent,var(--bg-primary))}.profile-info{padding:0 var(--space-lg);margin-top:-36px;position:relative}.profile-avatar{width:80px;height:80px;border-radius:var(--radius-full);border:3px solid var(--bg-primary);background:var(--gradient-primary);display:flex;align-items:center;justify-content:center;color:#fff;font-size:32px;overflow:hidden}.profile-avatar img{width:100%;height:100%;object-fit:cover}.profile-actions{position:absolute;top:0;right:var(--space-lg);display:flex;gap:var(--space-sm)}.profile-name{font-family:var(--font-display);font-size:var(--font-xl);font-weight:700;letter-spacing:-.03em;margin-top:var(--space-sm)}.profile-handle{color:var(--text-tertiary);font-size:var(--font-sm)}.profile-bio{margin-top:var(--space-sm);line-height:1.55;font-size:var(--font-base)}.profile-meta{display:flex;flex-wrap:wrap;gap:var(--space-md);margin-top:var(--space-sm);color:var(--text-tertiary);font-size:var(--font-sm)}.profile-meta-item{display:flex;align-items:center;gap:4px}.profile-meta-item .material-icons-round{font-size:15px}.profile-stats{display:flex;gap:var(--space-lg);margin-top:var(--space-md);margin-bottom:var(--space-sm);font-size:var(--font-sm)}.profile-stat-value{font-weight:700;color:var(--text-primary);font-family:var(--font-display)}.profile-stat-label{color:var(--text-tertiary)}.explore-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:var(--space-md);padding:var(--space-lg)}.explore-card{border-radius:var(--radius-lg);padding:var(--space-lg);cursor:pointer;transition:all var(--transition-base);background:var(--bg-tertiary);border:1px solid var(--border-color);position:relative;overflow:hidden}.explore-card:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--gradient-primary);opacity:0;transition:opacity var(--transition-base)}.explore-card:hover{transform:translateY(-3px);border-color:var(--border-hover);box-shadow:0 12px 32px #00000040}.explore-card:hover:before{opacity:1}.explore-card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-sm)}.explore-card-tag{font-family:var(--font-display);font-weight:700;font-size:var(--font-lg);letter-spacing:-.02em}.explore-card-count{font-size:var(--font-sm);color:var(--text-tertiary);margin-top:2px}.resources-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-md) var(--space-lg);border-bottom:1px solid var(--border-color);gap:var(--space-md)}.resource-card{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md) var(--space-lg);border-bottom:1px solid var(--border-color);transition:background var(--transition-fast);cursor:pointer}.resource-card:hover{background:var(--bg-hover)}.resource-icon{width:44px;height:44px;border-radius:var(--radius-md);background:var(--gradient-subtle);border:1px solid rgba(232,41,28,.15);display:flex;align-items:center;justify-content:center;flex-shrink:0}.resource-icon .material-icons-round{font-size:22px;color:var(--metu-red-light)}.resource-info{flex:1;min-width:0}.resource-name{font-weight:600;font-size:var(--font-base);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.resource-meta{font-size:var(--font-xs);color:var(--text-tertiary);display:flex;gap:var(--space-sm);margin-top:2px;flex-wrap:wrap}.resource-downloads{display:flex;align-items:center;gap:4px;color:var(--text-tertiary);font-size:var(--font-xs)}.messages-layout{display:flex;height:100%}.conversations-list{width:320px;border-right:1px solid var(--border-color);overflow-y:auto;flex-shrink:0}.conversation-item{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-md);cursor:pointer;transition:background var(--transition-fast);border-bottom:1px solid var(--border-color)}.conversation-item:hover{background:var(--bg-hover)}.conversation-item.active{background:var(--bg-active)}.conv-info{flex:1;min-width:0}.conv-name{font-weight:600;font-size:var(--font-sm)}.conv-last-msg{font-size:var(--font-xs);color:var(--text-tertiary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conv-time{font-size:var(--font-xs);color:var(--text-tertiary)}.chat-area{flex:1;display:flex;flex-direction:column}.chat-header{padding:var(--space-md) var(--space-lg);border-bottom:1px solid var(--border-color);display:flex;align-items:center;gap:var(--space-sm);background:var(--bg-secondary)}.chat-messages{flex:1;overflow-y:auto;padding:var(--space-lg);display:flex;flex-direction:column;gap:var(--space-sm)}.chat-bubble{max-width:68%;padding:10px var(--space-md);border-radius:var(--radius-lg);font-size:var(--font-sm);line-height:1.5}.chat-bubble.sent{align-self:flex-end;background:var(--gradient-primary);color:#fff;border-bottom-right-radius:4px}.chat-bubble.received{align-self:flex-start;background:var(--bg-tertiary);border:1px solid var(--border-color);border-bottom-left-radius:4px}.chat-bubble-time{font-size:var(--font-xs);color:#ffffff8c;text-align:right;margin-top:2px}.chat-bubble.received .chat-bubble-time{color:var(--text-tertiary)}.chat-input-area{padding:var(--space-md) var(--space-lg);border-top:1px solid var(--border-color);display:flex;gap:var(--space-sm);align-items:center;background:var(--bg-secondary)}.chat-input-area input{flex:1;padding:9px 16px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-full);color:var(--text-primary);outline:none;font-size:var(--font-sm);transition:border-color var(--transition-fast)}.chat-input-area input:focus{border-color:#e8291c80}.toast-container{position:fixed;bottom:80px;left:50%;transform:translate(-50%);z-index:9999;display:flex;flex-direction:column;gap:var(--space-sm);pointer-events:none}.toast{padding:10px 20px;border-radius:var(--radius-full);font-size:var(--font-sm);font-weight:500;color:#fff;pointer-events:auto;animation:toastIn .25s cubic-bezier(.16,1,.3,1);display:flex;align-items:center;gap:var(--space-sm);white-space:nowrap;box-shadow:0 4px 20px #00000059}.toast.success{background:#1a9e5a}.toast.error{background:#d92b2b}.toast.info{background:#1a7fc7}@keyframes toastIn{0%{opacity:0;transform:translateY(10px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}.toast.out{animation:toastOut .2s ease-in forwards}@keyframes toastOut{to{opacity:0;transform:translateY(-8px) scale(.95)}}.spinner{width:28px;height:28px;border:2px solid var(--border-color);border-top-color:var(--metu-red-light);border-radius:50%;animation:spin .75s linear infinite;margin:var(--space-xl) auto}@keyframes spin{to{transform:rotate(360deg)}}.loading-more{text-align:center;padding:var(--space-lg);color:var(--text-tertiary)}.empty-state{text-align:center;padding:var(--space-2xl) var(--space-xl);color:var(--text-secondary)}.empty-state .material-icons-round{font-size:44px;color:var(--text-tertiary);margin-bottom:var(--space-md)}.empty-state h3{font-family:var(--font-display);font-size:var(--font-lg);font-weight:700;letter-spacing:-.02em;margin-bottom:var(--space-sm)}.edit-profile-form{display:flex;flex-direction:column;gap:var(--space-md);padding:var(--space-md) 0}.edit-profile-form label{font-size:var(--font-xs);font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em}.edit-profile-form input,.edit-profile-form textarea,.edit-profile-form select{width:100%;padding:10px 14px;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);outline:none;margin-top:4px;transition:border-color var(--transition-fast)}.edit-profile-form input:focus,.edit-profile-form textarea:focus,.edit-profile-form select:focus{border-color:#e8291c80}.profile-loading{display:flex;justify-content:center;padding:var(--space-2xl)}@media(max-width:1200px){.right-sidebar{display:none}}@media(max-width:768px){.sidebar{display:none}.mobile-nav{display:flex}.main-content{border-right:none;padding-bottom:68px}.compose-inline,.post-card{padding:var(--space-sm) var(--space-md)}.page-header{padding:12px var(--space-md)}.messages-layout{flex-direction:column}.conversations-list{width:100%;border-right:none;max-height:40vh}.auth-container{flex-direction:column;padding:var(--space-lg);gap:var(--space-xl)}.auth-left{text-align:center;align-items:center}.auth-right{max-width:100%}.profile-cover{height:130px}.explore-grid{grid-template-columns:1fr 1fr;padding:var(--space-md)}}@media(max-width:480px){.auth-features{display:none}.auth-brand h1{font-size:var(--font-2xl)}.explore-grid{grid-template-columns:1fr}}