:root{color-scheme:dark;color:#111827;background:#f8fafc;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body,html{margin:0;min-height:100%}body{background:#f8fafc}button,input,select,textarea{font:inherit}.main{max-width:960px;margin:0 auto;padding:2rem 1rem}.page-title{margin:0 0 .75rem;font-size:clamp(2rem,3vw,2.75rem)}.card{background:#fff;border:1px solid #e2e8f0;border-radius:1rem;box-shadow:0 24px 48px rgba(15,23,42,.08);padding:2rem}.button{background:#0d47a1;border:none;border-radius:999px;color:#fff;cursor:pointer;padding:.85rem 1.25rem}.link-grid{margin-top:2rem}.card-list,.link-grid{display:grid;grid-gap:1rem;gap:1rem}.input-group{display:grid;grid-gap:.5rem;gap:.5rem;margin-bottom:1rem}input,textarea{width:100%;border:1px solid #cbd5e1;border-radius:.75rem;padding:.85rem 1rem;background:#fff;color:#111827}input::placeholder,textarea::placeholder{color:#94a3b8}textarea{min-height:120px}.error{color:#b91c1c;margin-top:.5rem}.error-message{background:#fee2e2;color:#b91c1c;border-left:4px solid #b91c1c}.error-message,.success-message{padding:.75rem 1rem;border-radius:.5rem;margin-bottom:1rem}.success-message{background:#dcfce7;color:#166534;border-left:4px solid #22c55e}input:disabled,textarea:disabled{background:#f1f5f9;color:#94a3b8;cursor:not-allowed;border-color:#e2e8f0}.settings-tabs{display:flex;gap:1rem;margin-bottom:2rem;border-bottom:2px solid #e2e8f0}.tab-button{background:none;padding:1rem 0;font-size:1rem;color:#64748b;cursor:pointer;border:none;border-bottom:3px solid transparent;transition:all .2s ease;font-weight:500}.tab-button:hover{color:#475569}.tab-button.active{color:#0f766e;border-bottom-color:#0f766e}.small-text{color:#475569;font-size:.95rem}body{min-height:100vh}.app-shell,.home-page{display:flex;min-height:100vh}.home-page{padding:4rem 1rem;align-items:center;justify-content:center;background-image:radial-gradient(circle at top left,hsla(0,0%,100%,.18),transparent 28%),radial-gradient(circle at bottom right,rgba(15,118,110,.22),transparent 22%),linear-gradient(180deg,#0f766e,#115e59 35%,#0f766e),url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 800 600'%3E%3Crect width='800' height='600' fill='none'/%3E%3Cpath d='M600 120H200a28 28 0 0 0-28 28v304a28 28 0 0 0 28 28h400a28 28 0 0 0 28-28V148a28 28 0 0 0-28-28Z' fill='%23ffffff' opacity='0.18'/%3E%3Crect x='240' y='180' width='320' height='260' rx='22' fill='%23ffffff' opacity='0.12'/%3E%3Crect x='288' y='220' width='224' height='24' rx='12' fill='%23ffffff' opacity='0.8'/%3E%3Crect x='288' y='264' width='192' height='18' rx='9' fill='%23ffffff' opacity='0.65'/%3E%3Crect x='288' y='298' width='256' height='18' rx='9' fill='%23ffffff' opacity='0.65'/%3E%3Crect x='288' y='332' width='144' height='18' rx='9' fill='%23ffffff' opacity='0.65'/%3E%3Ccircle cx='364' cy='423' r='30' fill='%23ffffff' opacity='0.8'/%3E%3Ccircle cx='436' cy='423' r='30' fill='%23ffffff' opacity='0.8'/%3E%3C/svg%3E");background-size:cover;background-position:50%;color:#fff}.home-card{max-width:620px;background:hsla(0,0%,100%,.92)}.home-card p{color:#0f172a}.home-link-grid{grid-template-columns:repeat(auto-fit,minmax(170px,1fr))}.home-button{padding:.75rem 1rem;max-width:200px;width:100%;justify-self:start}@media (max-width:640px){.home-page{padding:2rem 1rem}.home-button{max-width:100%}}.sidebar{min-width:260px;padding:2rem 1.25rem;background:#0d47a1;color:#fff;display:flex;flex-direction:column;gap:1.5rem}.sidebar-brand{font-size:1.15rem;font-weight:700;letter-spacing:.02em}.sidebar-nav{display:flex;flex-direction:column;gap:.75rem}.sidebar-link{display:block;padding:.9rem 1rem;border-radius:.9rem;color:#fff;text-decoration:none;background:hsla(0,0%,100%,.08);transition:background .2s ease}.sidebar-link.active,.sidebar-link:hover{background:hsla(0,0%,100%,.18)}.page-content{flex:1 1;min-width:0}@media (max-width:900px){.app-shell{flex-direction:column}.sidebar{width:100%;min-width:auto}}.landing-root *{margin:0;padding:0;box-sizing:border-box}.landing-root{font-family:Arial,Helvetica,sans-serif;background:#f4f6f9;color:#333;line-height:1.6}.landing-root header{background:linear-gradient(135deg,#0d47a1,#1976d2);color:#fff;padding:20px 40px;display:flex;justify-content:space-between;align-items:center}.landing-root header h1{font-size:28px}.landing-root .header-buttons{display:flex;gap:12px}.landing-root .btn{padding:12px 22px;border:none;border-radius:8px;cursor:pointer;font-size:15px;transition:.3s;text-decoration:none;font-weight:700}.landing-root .btn-login{background:#fff;color:#1976d2}.landing-root .btn-login:hover{background:#e3f2fd}.landing-root .btn-register{background:#43a047;color:#fff}.landing-root .btn-register:hover{background:#388e3c}.landing-root .hero{max-width:1200px;margin:auto;display:grid;grid-template-columns:1fr 1fr;grid-gap:40px;gap:40px;align-items:center;padding:60px 30px}.landing-root .hero-text h2{font-size:42px;color:#0d47a1;margin-bottom:20px}.landing-root .hero-text p{margin-bottom:18px;font-size:18px;color:#555}.landing-root .hero-image img{width:100%;border-radius:16px;box-shadow:0 10px 30px rgba(0,0,0,.15)}.landing-root .features{background:#fff;padding:60px 30px}.landing-root .features-container{max-width:1100px;margin:auto}.landing-root .features h3{text-align:center;font-size:34px;margin-bottom:40px;color:#0d47a1}.landing-root .cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));grid-gap:25px;gap:25px}.landing-root .card{background:#f8fafc;padding:30px;border-radius:14px;box-shadow:0 5px 15px rgba(0,0,0,.05);transition:.3s}.landing-root .card:hover{transform:translateY(-5px)}.landing-root .card h4{margin-bottom:15px;color:#1976d2;font-size:22px}.landing-root .card p{color:#555}.landing-root footer{text-align:center;padding:30px;background:#0d47a1;color:#fff;margin-top:40px}@media(max-width:900px){.landing-root .hero{grid-template-columns:1fr}.landing-root .hero-text{text-align:center}.landing-root header{flex-direction:column;gap:20px}}