:root{--color-bg: #f8fafc;--color-text: #0f172a;--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-success: #10b981;--color-warning: #f59e0b;--color-danger: #ef4444;--color-border: #e2e8f0;--color-card-bg: #ffffff;--radius: .5rem;--shadow: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1)}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--color-bg);color:var(--color-text);margin:0;padding:0;display:flex;flex-direction:column;min-height:100vh}a{color:var(--color-primary);text-decoration:none}.app-header{background:var(--color-card-bg);padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;box-shadow:var(--shadow);border-bottom:1px solid var(--color-border)}.logo{font-weight:700;font-size:1.25rem}.app-nav{display:flex;gap:1.5rem}.app-nav a{font-weight:500;color:#64748b}.app-nav a.active,.app-nav a:hover{color:var(--color-primary)}.app-main{flex:1;margin:2rem auto;width:100%;max-width:1440px;padding:0 1rem}.card{background:var(--color-card-bg);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow);border:1px solid var(--color-border);margin-bottom:1.5rem}button{background-color:var(--color-primary);color:#fff;border:none;padding:.5rem 1rem;border-radius:var(--radius);cursor:pointer;font-weight:500;transition:background-color .2s}button:hover{background-color:var(--color-primary-hover)}button:disabled{opacity:.5;cursor:not-allowed}input,select{padding:.5rem;border:1px solid var(--color-border);border-radius:var(--radius);outline:none}input:focus,select:focus{border-color:var(--color-primary)}table{width:100%;border-collapse:collapse;margin-bottom:1rem}th,td{padding:.75rem;text-align:left;border-bottom:1px solid var(--color-border)}th{font-weight:600;color:#475569}.traffic-light{width:3rem;height:3rem;border-radius:50%;display:inline-block;box-shadow:inset 0 2px 4px #0000004d}.traffic-light.red{background-color:var(--color-danger)}.traffic-light.yellow{background-color:var(--color-warning)}.traffic-light.green{background-color:var(--color-success)}.traffic-light.gray{background-color:#cbd5e1}