:root{--primary-color: #2563eb;--secondary-color: #3b82f6;--background-color: #f8fafc;--text-color: #1e293b;--border-color: #e2e8f0;--success-color: #22c55e;--error-color: #ef4444;--shadow: 0 1px 3px rgba(0,0,0,.1);--max-width: 1200px;--spacing-unit: 1rem}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;color:var(--text-color);background-color:var(--background-color)}.main-content{margin-top:80px;padding:calc(var(--spacing-unit) * 2);max-width:var(--max-width);margin-left:auto;margin-right:auto}.login-container{max-width:400px;margin:2rem auto;padding:2rem;background:#fff;border-radius:8px;box-shadow:var(--shadow)}.dashboard{max-width:var(--max-width);margin:2rem auto;padding:0 1rem}.header{background:#fff;box-shadow:var(--shadow);position:fixed;width:100%;top:0;z-index:100}.nav-container{max-width:var(--max-width);margin:0 auto;padding:var(--spacing-unit);display:flex;justify-content:space-between;align-items:center}.logo{font-weight:700;color:var(--primary-color);text-decoration:none;font-size:1.5rem}.nav-menu{display:flex;gap:2rem;list-style:none}.nav-link{color:var(--text-color);text-decoration:none;transition:color .2s}.nav-link:hover{color:var(--primary-color)}.dashboard-nav{display:flex;justify-content:flex-end;padding:1rem 0;margin-bottom:2rem}.auth-form,.login-form{display:flex;flex-direction:column;gap:1.5rem}.form-group{display:flex;flex-direction:column;gap:.5rem;margin-bottom:1.5rem}.form-label{font-weight:500;color:var(--text-color)}.form-input{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:4px;font-size:1rem;transition:border-color .2s}.form-input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px #2563eb1a}.btn,.login-button,.logout-button,.file-action-button{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;border:none;border-radius:4px;font-weight:500;cursor:pointer;transition:all .2s}.btn-primary,.login-button{background:var(--primary-color);color:#fff}.btn-primary:hover,.login-button:hover{background:var(--secondary-color)}.btn-secondary{background:var(--border-color);color:var(--text-color)}.logout-button{background:var(--error-color);color:#fff}.logout-button:hover{background:#dc2626}.login-button:disabled{background:#94a3b8;cursor:not-allowed}.file-table{width:100%;border-collapse:collapse;background:#fff;box-shadow:var(--shadow);border-radius:8px;overflow:hidden}.file-table th,.file-table td{padding:1rem;text-align:left;border-bottom:1px solid var(--border-color)}.file-table th{background:var(--background-color);font-weight:600}.download-link{color:var(--primary-color);text-decoration:none;font-weight:500}.download-link:hover{text-decoration:underline}.error-message{color:var(--error-color);background:#fee2e2;padding:.75rem;border-radius:4px;margin:1rem 0;text-align:center}@media (max-width: 768px){.nav-menu{display:none}.main-content{padding:1rem;margin-top:60px}.file-table{display:block;overflow-x:auto}}@media (max-width: 480px){.login-container{margin:1rem;padding:1.5rem}}@media (prefers-color-scheme: dark){:root{--background-color: #1e293b;--text-color: #f8fafc;--border-color: #334155}body{background:#0f172a}.header,.file-table,.auth-form,.login-container{background:#1e293b}}.text-center{text-align:center}.mt-2{margin-top:.5rem}.mb-4{margin-bottom:1rem}