:root{--primary-color: #6366f1;--primary-hover: #4f46e5;--bg-color: #0f172a;--card-bg: #1e293b;--text-color: #f8fafc;--text-muted: #94a3b8;--border-color: #334155;--success-color: #10b981;--font-family: "Inter", sans-serif;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--radius: .75rem}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-color);color:var(--text-color);line-height:1.5;min-height:100vh}.app-container{display:flex;flex-direction:column;min-height:100vh;max-width:1200px;margin:0 auto;padding:0 1rem}.main-header{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 0;border-bottom:1px solid var(--border-color);margin-bottom:2rem}.logo{display:flex;align-items:center;gap:.5rem;font-weight:700;font-size:1.5rem;color:var(--primary-color)}.main-nav{display:flex;gap:1.5rem}.nav-link{color:var(--text-muted);text-decoration:none;font-weight:500;transition:color .2s}.nav-link:hover,.nav-link.active{color:var(--primary-color)}#main-content{flex:1;display:flex;flex-direction:column;align-items:center;width:100%}.calculator-card{background-color:var(--card-bg);border-radius:var(--radius);padding:2rem;box-shadow:var(--shadow-md);width:100%;max-width:600px;border:1px solid var(--border-color)}h1{font-size:2rem;font-weight:700;margin-bottom:1.5rem;text-align:center}.form-group{margin-bottom:1.5rem}label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--text-muted)}input[type=time],input[type=number],input[type=text]{width:100%;padding:.75rem;border-radius:var(--radius);border:1px solid var(--border-color);background-color:var(--bg-color);color:var(--text-color);font-family:inherit;font-size:1rem;transition:border-color .2s}input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px #6366f133}.btn-primary{width:100%;padding:.75rem;border-radius:var(--radius);border:none;background-color:var(--primary-color);color:#fff;font-weight:600;font-size:1rem;cursor:pointer;transition:background-color .2s}.btn-primary:hover{background-color:var(--primary-hover)}.results-area{margin-top:2rem;padding-top:1.5rem;border-top:1px solid var(--border-color)}.result-item{display:flex;justify-content:space-between;margin-bottom:.75rem;font-size:1.1rem}.result-label{color:var(--text-muted)}.result-value{font-weight:600;color:var(--text-color)}.result-value.highlight{color:var(--success-color);font-size:1.25rem}.main-footer{padding:2rem 0;text-align:center;color:var(--text-muted);border-top:1px solid var(--border-color);margin-top:3rem}.timesheet-grid{display:grid;gap:1rem}.timesheet-row{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;gap:.5rem;align-items:center}@media(max-width:600px){.timesheet-row{grid-template-columns:1fr 1fr}}