:root{--color-bg: #f8f9fb;--color-surface: #ffffff;--color-text: #1d1d1f;--color-text-secondary: #6e6e73;--color-text-tertiary: #aeaeb2;--color-accent: #4f46e5;--color-accent-hover: #4338ca;--color-accent-light: rgba(79, 70, 229, .08);--color-border: rgba(0, 0, 0, .06);--color-input-bg: #f5f5f7;--color-input-border: rgba(0, 0, 0, .1);--color-input-focus: rgba(79, 70, 229, .3);--radius-sm: 10px;--radius-md: 16px;--radius-lg: 24px;--radius-pill: 100px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .04);--shadow-md: 0 4px 20px rgba(0, 0, 0, .06);--shadow-lg: 0 12px 40px rgba(0, 0, 0, .08);--font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--transition: .25s cubic-bezier(.4, 0, .2, 1);--sidebar-width: 280px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-stack);background:var(--color-bg);color:var(--color-text);line-height:1.6;min-height:100vh}.sidebar{position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-width);background:var(--color-surface);border-left:4px solid var(--color-accent);border-right:1px solid var(--color-border);display:flex;flex-direction:column;z-index:100;transition:transform .35s cubic-bezier(.4,0,.2,1)}.sidebar-brand{padding:28px 24px 24px;border-bottom:1px solid var(--color-border)}.sidebar-brand a{font-size:18px;font-weight:700;color:var(--color-text);text-decoration:none;letter-spacing:-.3px;display:flex;align-items:center;gap:10px}.sidebar-brand a span{color:var(--color-accent)}.sidebar-brand .brand-icon{width:36px;height:36px;border-radius:var(--radius-sm);background:linear-gradient(135deg,var(--color-accent) 0%,#7c3aed 100%);display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px;flex-shrink:0}.sidebar-nav{flex:1;padding:20px 16px;display:flex;flex-direction:column;gap:4px}.sidebar-nav a{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:var(--radius-sm);text-decoration:none;color:var(--color-text-secondary);font-size:14px;font-weight:500;transition:all var(--transition)}.sidebar-nav a i{width:20px;text-align:center;font-size:15px}.sidebar-nav a:hover{background:var(--color-input-bg);color:var(--color-text)}.sidebar-nav a.active{background:var(--color-accent-light);color:var(--color-accent);font-weight:600}.sidebar-nav a.active i{color:var(--color-accent)}.sidebar-nav a.disabled{opacity:.45;cursor:not-allowed;pointer-events:none}.sidebar-divider{height:1px;background:var(--color-border);margin:8px 0}.sidebar-user{padding:20px 24px;border-top:1px solid var(--color-border);display:flex;align-items:center;gap:12px}.sidebar-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#6366f1,#8b5cf6);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;color:#fff;flex-shrink:0}.sidebar-user-info{flex:1;min-width:0}.sidebar-user-name{font-size:14px;font-weight:600;color:var(--color-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-user-email{font-size:12px;color:var(--color-text-tertiary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-user-status{width:8px;height:8px;border-radius:50%;background:#34d399;flex-shrink:0}.sidebar-user-action{background:none;border:none;cursor:pointer;padding:6px;border-radius:var(--radius-pill);color:var(--color-text-tertiary);transition:all var(--transition);flex-shrink:0}.sidebar-user-action:hover{color:var(--color-text);background:var(--color-surface)}.sidebar-signin{width:100%;justify-content:center;padding:12px 20px;font-size:14px}.auth-gate{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;min-height:60vh;text-align:center;color:var(--color-text-secondary)}.auth-gate h2{color:var(--color-text);margin:0}.auth-gate p{margin:0}.main-content{margin-left:var(--sidebar-width);min-height:100vh}.section-content{opacity:0;transform:translateY(30px);transition:opacity .6s ease,transform .6s ease}.section-content.visible{opacity:1;transform:translateY(0)}section.landing{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:60px 48px;text-align:center;background:linear-gradient(180deg,var(--color-bg) 0%,#eef0f8 100%);margin-left:calc(var(--sidebar-width) * -1);padding-left:calc(var(--sidebar-width) + 48px)}.landing-content{max-width:700px}.landing-badge{display:inline-flex;align-items:center;gap:8px;background:var(--color-accent-light);color:var(--color-accent);font-size:13px;font-weight:600;padding:6px 16px;border-radius:var(--radius-pill);margin-bottom:32px}section.landing h1{font-size:clamp(36px,6vw,60px);font-weight:700;letter-spacing:-1.5px;line-height:1.1;margin-bottom:20px}section.landing h1 .gradient{background:linear-gradient(135deg,var(--color-accent) 0%,#7c3aed 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}section.landing p{font-size:18px;color:var(--color-text-secondary);max-width:480px;margin:0 auto 40px;line-height:1.7}.landing-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-stack);font-size:15px;font-weight:600;padding:14px 28px;border-radius:var(--radius-pill);border:none;cursor:pointer;transition:all var(--transition);text-decoration:none}.btn-primary{background:var(--color-accent);color:#fff;box-shadow:0 4px 14px #4f46e559}.btn-primary:hover{background:var(--color-accent-hover);box-shadow:0 6px 20px #4f46e573;transform:translateY(-1px)}.btn-secondary{background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border);box-shadow:var(--shadow-sm)}.btn-secondary:hover{border-color:var(--color-input-border);box-shadow:var(--shadow-md);transform:translateY(-1px)}.btn-sm{padding:10px 22px;font-size:14px}.landing-features{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:64px;text-align:left}.feature-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:24px;transition:all var(--transition)}.feature-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.feature-card .icon{width:40px;height:40px;border-radius:var(--radius-sm);background:var(--color-accent-light);color:var(--color-accent);display:flex;align-items:center;justify-content:center;font-size:16px;margin-bottom:14px}.feature-card h3{font-size:15px;font-weight:600;margin-bottom:6px}.feature-card p{font-size:13px;color:var(--color-text-secondary);margin:0;line-height:1.5}section.profile-view{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:60px 48px;background:var(--color-bg)}.profile-container{width:100%;max-width:960px}.section-header{margin-bottom:32px}.section-header h2{font-size:28px;font-weight:700;letter-spacing:-.5px;margin-bottom:6px}.section-header p{color:var(--color-text-secondary);font-size:15px}.profile-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);overflow:hidden}.profile-banner{background:linear-gradient(135deg,#4f46e5,#7c3aed,#6366f1);height:160px;position:relative;display:flex;align-items:flex-end;padding:0 40px}.profile-banner-pattern{position:absolute;top:0;right:0;bottom:0;left:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E")}.profile-banner-actions{position:absolute;top:16px;right:16px}.btn-icon{width:36px;height:36px;border-radius:var(--radius-pill);background:#fff3;border:none;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:14px;transition:all var(--transition);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);text-decoration:none}.btn-icon:hover{background:#ffffff59}.profile-main{display:grid;grid-template-columns:auto 1fr;gap:0 32px;padding:0 40px 40px}.profile-avatar-col{margin-top:-32px;position:relative;z-index:2}.avatar{width:96px;height:96px;border-radius:50%;background:linear-gradient(135deg,#6366f1,#8b5cf6);border:4px solid var(--color-surface);display:flex;align-items:center;justify-content:center;font-size:36px;font-weight:700;color:#fff;box-shadow:var(--shadow-md)}.profile-info-col{padding-top:20px}.profile-top-row{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:8px}.profile-name{font-size:26px;font-weight:700;letter-spacing:-.3px}.profile-bio{color:var(--color-text-secondary);font-size:15px;margin-bottom:16px;max-width:560px}.profile-meta{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:0}.meta-item{display:flex;align-items:center;gap:6px;font-size:14px;color:var(--color-text-secondary)}.meta-item i{color:var(--color-text-tertiary);width:16px;text-align:center}.profile-full-width{grid-column:1 / -1;padding-top:24px}.profile-divider{height:1px;background:var(--color-border);margin-bottom:24px}.profile-details{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.detail-group h4{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.8px;color:var(--color-text-tertiary);margin-bottom:8px}.detail-group p{font-size:15px;color:var(--color-text)}.detail-group a{color:var(--color-accent);text-decoration:none;font-size:15px}.detail-group a:hover{text-decoration:underline}.social-links{display:flex;gap:10px;margin-top:24px}.social-link{width:40px;height:40px;border-radius:var(--radius-sm);background:var(--color-input-bg);display:flex;align-items:center;justify-content:center;color:var(--color-text-secondary);font-size:16px;text-decoration:none;transition:all var(--transition)}.social-link:hover{background:var(--color-accent-light);color:var(--color-accent);transform:translateY(-2px)}section.profile-edit{min-height:100vh;display:flex;align-items:flex-start;justify-content:center;padding:80px 48px 60px;background:var(--color-bg)}.edit-container{width:100%;max-width:960px}.edit-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:40px}.form-section{margin-bottom:36px}.form-section:last-child{margin-bottom:0}.form-section-title{font-size:17px;font-weight:600;margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--color-border)}.form-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px}.form-group{display:flex;flex-direction:column}.form-group.full{grid-column:1 / -1}.form-group.span-2{grid-column:span 2}.form-group label{font-size:13px;font-weight:500;color:var(--color-text-secondary);margin-bottom:6px}.input-wrapper{position:relative}.input-wrapper i{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--color-text-tertiary);font-size:14px;pointer-events:none}.input-wrapper.textarea-wrapper i{top:16px;transform:none}.input-wrapper input,.input-wrapper textarea{padding-left:40px}input,textarea,select{width:100%;font-family:var(--font-stack);font-size:15px;padding:12px 14px;border:1px solid var(--color-input-border);border-radius:var(--radius-sm);background:var(--color-input-bg);color:var(--color-text);transition:all var(--transition);outline:none}input:focus,textarea:focus,select:focus{border-color:var(--color-accent);box-shadow:0 0 0 3px var(--color-input-focus);background:var(--color-surface)}textarea{resize:vertical;min-height:100px;line-height:1.6}.form-actions{display:flex;justify-content:flex-end;gap:12px;margin-top:32px;padding-top:24px;border-top:1px solid var(--color-border)}.state-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:64px 40px;text-align:center}.state-icon{width:56px;height:56px;border-radius:var(--radius-md);background:var(--color-accent-light);color:var(--color-accent);display:flex;align-items:center;justify-content:center;font-size:22px;margin:0 auto 20px}.state-card h3{font-size:18px;font-weight:600;margin-bottom:8px}.state-card p{font-size:14px;color:var(--color-text-secondary);margin-bottom:24px}.loading-spinner{width:40px;height:40px;border:3px solid var(--color-border);border-top-color:var(--color-accent);border-radius:50%;animation:spin .8s linear infinite;margin:0 auto 16px}@keyframes spin{to{transform:rotate(360deg)}}.toast{position:fixed;bottom:32px;left:50%;transform:translate(-50%) translateY(100px);background:var(--color-text);color:#fff;padding:14px 24px;border-radius:var(--radius-pill);font-size:14px;font-weight:500;box-shadow:var(--shadow-lg);z-index:200;transition:transform .4s cubic-bezier(.34,1.56,.64,1);display:flex;align-items:center;gap:8px;white-space:nowrap}.toast.visible{transform:translate(-50%) translateY(0)}.toast i{color:#34d399}.toast.toast-error i{color:#f87171}.bottom-tabs{display:none}@media (max-width: 1024px){.profile-details{grid-template-columns:repeat(2,1fr)}.form-grid{grid-template-columns:1fr 1fr}.form-group.span-2{grid-column:span 2}}@media (max-width: 768px){.sidebar{transform:translate(-100%);pointer-events:none}.main-content{margin-left:0;padding-bottom:72px}section.landing{margin-left:0;padding-left:24px;padding-right:24px;min-height:100vh}section.profile-view,section.profile-edit{padding:48px 20px;min-height:auto}section.profile-edit{padding-top:48px}.landing-features{grid-template-columns:1fr;margin-top:48px}.profile-banner{height:120px;padding:0 20px}.profile-main{grid-template-columns:1fr;padding:0 20px 28px}.profile-avatar-col{margin-top:-28px}.profile-info-col{padding-top:12px}.profile-details{grid-template-columns:1fr;gap:18px}.edit-card{padding:24px}.form-grid{grid-template-columns:1fr}.form-group.span-2{grid-column:span 1}.form-actions{flex-direction:column}.form-actions .btn{width:100%;justify-content:center}.bottom-tabs{display:flex;position:fixed;bottom:0;left:0;right:0;background:var(--color-surface);border-top:1px solid var(--color-border);z-index:100;padding:0;padding-bottom:env(safe-area-inset-bottom,0px);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px)}.bottom-tabs a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:10px 0;text-decoration:none;color:var(--color-text-tertiary);font-size:10px;font-weight:500;gap:4px;transition:color var(--transition)}.bottom-tabs a i{font-size:20px}.bottom-tabs a.active{color:var(--color-accent)}.bottom-tabs a:hover{color:var(--color-text-secondary)}.toast{bottom:88px}}@media (max-width: 480px){section.landing h1{font-size:32px}}