:root{--bg: #f8fafc;--bg-card: #ffffff;--text-main: #0f172a;--text-muted: #64748b;--border: #e2e8f0;--primary: #2563eb;--primary-hover: #1d4ed8;--success: #10b981;--danger: #ef4444;--warning: #f59e0b;--header-bg: #ffffff}[data-theme=dark]{--bg: #0f172a;--bg-card: #1e293b;--text-main: #f1f5f9;--text-muted: #94a3b8;--border: #334155;--primary: #3b82f6;--primary-hover: #2563eb;--header-bg: #1e293b}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:var(--bg);color:var(--text-main);transition:background-color .3s,color .3s;min-height:100vh}.header{display:flex;justify-content:space-between;align-items:center;padding:1rem 2rem;background-color:var(--header-bg);border-bottom:1px solid var(--border);box-shadow:0 1px 3px #0000001a}.header-nav{display:flex;gap:1rem}.nav-btn{background:none;border:none;padding:.5rem 1rem;color:var(--text-muted);cursor:pointer;font-weight:500;border-radius:6px;transition:all .2s}.nav-btn:hover{background:var(--bg);color:var(--text-main)}.nav-btn.active{background:var(--primary);color:#fff}.theme-toggle{background:var(--bg);border:1px solid var(--border);color:var(--text-main);padding:.5rem 1rem;border-radius:6px;cursor:pointer;font-weight:600}.login-container{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:1rem}.login-card{background:var(--bg-card);padding:2.5rem;border-radius:12px;box-shadow:0 10px 25px -5px #0000001a;width:100%;max-width:400px;border:1px solid var(--border)}.login-card h1{text-align:center;margin-bottom:1.5rem;font-size:1.5rem}.form-group{display:flex;flex-direction:column;margin-bottom:1rem}.form-group label{font-size:.875rem;font-weight:500;margin-bottom:.5rem}.form-group input{padding:.75rem;border:1px solid var(--border);border-radius:6px;background:var(--bg);color:var(--text-main);font-size:1rem}.form-group input:focus{outline:2px solid var(--primary);border-color:transparent}.login-submit{width:100%;padding:.75rem;background:var(--primary);color:#fff;border:none;border-radius:6px;font-weight:600;cursor:pointer;margin-top:1rem}.dashboard-main{padding:2rem;max-width:1400px;margin:0 auto}.dashboard-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem;margin-top:1.5rem}.widget-card{background:var(--bg-card);border-radius:12px;padding:1.5rem;border:1px solid var(--border);box-shadow:0 4px 6px -1px #0000000d;display:flex;flex-direction:column}.widget-card h3{font-size:.875rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);margin-bottom:.5rem}.widget-value{font-size:2rem;font-weight:700;margin-bottom:.5rem}.widget-note{font-size:.75rem;color:var(--text-muted)}.semaforo-list{display:flex;flex-direction:column;gap:.75rem;margin-top:1rem}.semaforo-item{display:flex;justify-content:space-between;align-items:center;padding:.5rem 0;border-bottom:1px solid var(--border)}.semaforo-name{font-weight:500;font-size:.9rem}.semaforo-dot{width:12px;height:12px;border-radius:50%;display:inline-block}.semaforo-dot.green{background:var(--success);box-shadow:0 0 8px var(--success)}.semaforo-dot.red{background:var(--danger);box-shadow:0 0 8px var(--danger)}@media (max-width: 768px){.header{flex-direction:column;gap:1rem;padding:1rem}.header-nav{width:100%;justify-content:space-between}.dashboard-main{padding:1rem}.dashboard-grid{grid-template-columns:1fr;gap:1rem}.widget-value{font-size:1.5rem}}.widget-card form{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:10px}.widget-card form input[type=number],.widget-card form input[type=text]{width:70px!important;padding:4px 8px;border-radius:4px;border:1px solid var(--border);background:var(--bg-alt);color:var(--text)}.semaforo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:8px;margin-top:10px}.semaforo-item{display:flex;align-items:center;justify-content:space-between;background:var(--bg-alt);padding:6px 10px;border-radius:6px;border:1px solid var(--border);font-size:.85rem}.semaforo-led{width:10px;height:10px;border-radius:50%;background-color:#22c55e;box-shadow:0 0 5px #22c55e}.heatmap-2col{display:grid;grid-template-columns:1fr 1fr;gap:4px;margin-top:10px}