:root{--bg: #f6f8fb;--card: #ffffff;--text: #111827;--muted: #6b7280;--accent: #2563eb;--accent-hover: #1d4ed8;--border: #e5e7eb;--success: #10b981;--error: #ef4444;--warning: #f59e0b}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}.app{max-width:520px;margin:40px auto;padding:20px;min-height:100vh}.card{background:var(--card);border-radius:20px;padding:30px;box-shadow:0 10px 30px #00000014;border:1px solid var(--border)}.header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;flex-wrap:wrap;gap:16px}h1{font-size:2rem;margin:0;background:linear-gradient(135deg,var(--accent),#3b82f6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}h3{margin:0 0 16px;font-size:1.25rem;color:var(--text)}form{display:flex;gap:10px;margin-bottom:20px}input[type=text]{flex:1;padding:12px 16px;border-radius:12px;border:2px solid var(--border);font-size:1rem;transition:all .2s ease;outline:none}input[type=text]:focus{border-color:var(--accent);box-shadow:0 0 0 3px #2563eb1a}button{padding:12px 20px;border-radius:12px;border:none;background:var(--accent);color:#fff;font-weight:600;font-size:.95rem;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;gap:8px}button:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 4px 12px #2563eb33}button:active{transform:translateY(0)}.location-button{width:100%;margin-bottom:24px;background:linear-gradient(135deg,#667eea,#764ba2)}.location-button:hover{background:linear-gradient(135deg,#5a67d8,#6b46c1)}.units{display:flex;align-items:center;gap:8px;background:var(--bg);padding:6px;border-radius:12px;border:1px solid var(--border)}.units label{display:flex;align-items:center;gap:6px;cursor:pointer;padding:6px 12px;border-radius:8px;transition:all .2s ease;font-size:.95rem}.units label:hover{background:#2563eb1a}.units input[type=radio]{margin:0;cursor:pointer}.units input[type=radio]:checked+span{font-weight:600;color:var(--accent)}.weather{display:flex;align-items:center;gap:20px;margin:24px 0;padding:24px;background:linear-gradient(135deg,#2563eb0d,#3b82f60d);border-radius:16px;border:1px solid var(--border)}.weather img{width:100px;height:100px;filter:drop-shadow(0 4px 8px rgba(0,0,0,.1))}.temp{font-size:3.5rem;font-weight:700;line-height:1;margin-bottom:4px;background:linear-gradient(135deg,var(--accent),#3b82f6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.desc{color:var(--muted);text-transform:capitalize;font-size:1.1rem;margin-bottom:8px}.location{display:flex;align-items:center;gap:8px;color:var(--text);font-weight:500}.forecast-container{margin-top:32px;padding-top:24px;border-top:1px solid var(--border)}.forecast-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.forecast-item{text-align:center;padding:16px 8px;border-radius:12px;background:var(--bg);border:1px solid var(--border);transition:all .2s ease}.forecast-item:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0000000d}.forecast-day{font-weight:600;color:var(--text);margin-bottom:8px;font-size:.9rem}.forecast-icon{width:50px;height:50px;margin:8px auto}.forecast-temp{font-weight:600;color:var(--text);font-size:1.1rem}.loading{text-align:center;padding:40px;color:var(--muted)}.loading:after{content:"";display:inline-block;width:20px;height:20px;margin-left:10px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.error-message{background:linear-gradient(135deg,#ef44441a,#dc26261a);border:1px solid var(--error);border-radius:12px;padding:16px;margin:20px 0;color:var(--error);text-align:center;font-weight:500}.success-message{background:linear-gradient(135deg,#10b9811a,#0596691a);border:1px solid var(--success);border-radius:12px;padding:16px;margin:20px 0;color:var(--success);text-align:center;font-weight:500}.weather-details{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:20px}.detail-item{display:flex;align-items:center;gap:12px;padding:12px;background:var(--bg);border-radius:12px;border:1px solid var(--border)}.detail-icon{font-size:1.2rem;color:var(--accent)}.detail-label{font-size:.85rem;color:var(--muted)}.detail-value{font-weight:600;color:var(--text)}@media(max-width:600px){.app{margin:20px auto;padding:10px}.card{padding:20px}.header{flex-direction:column;align-items:flex-start}.units{align-self:stretch;justify-content:center}.weather{flex-direction:column;text-align:center;gap:16px}.temp{font-size:3rem}.forecast-grid{grid-template-columns:repeat(3,1fr);gap:8px}.weather-details{grid-template-columns:1fr}}@media(max-width:400px){.forecast-grid{grid-template-columns:repeat(2,1fr)}}