:root {
            --primary: #dc2626;
            --primary-dark: #991b1b;
            --primary-light: #ef4444;
            --success: #10b981;
            --error: #dc2626;
            --warning: #d97706;
            --bg: #0f0f0f;
            --bg-secondary: #1a1a1a;
            --card: #1e1e1e;
            --card-border: #2a2a2a;
            --text: #ffffff;
            --text-secondary: #a1a1aa;
            --text-muted: #71717a;
            --border: #404040;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
            --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            background: var(--bg);
            color: var(--text);
            margin: 0;
            line-height: 1.6;
            min-height: 100vh;
        }

        .header {
            background: var(--card);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow);
        }

        .header-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 1rem 2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .header-left {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .logo {
            width: 48px;
            height: 48px;
            background: var(--primary);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: white;
        }

        .header-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text);
            margin: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
        }

        .nav-link {
            color: var(--text-secondary);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.2s;
        }

        .nav-link:hover {
            color: var(--text);
        }

        .login-btn {
            background: var(--primary);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.2s;
            border: none;
            cursor: pointer;
        }

        .login-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }

        .main {
            max-width: 600px;
            margin: 2rem auto;
            padding: 0 1rem;
        }

        .card {
            background: var(--card);
            border-radius: 12px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--card-border);
            overflow: hidden;
        }

        .card-header {
            padding: 2rem 2rem 1rem;
            text-align: center;
            border-bottom: 1px solid var(--border);
        }

        .card-title {
            font-size: 1.875rem;
            font-weight: 700;
            color: var(--primary);
            margin: 0 0 0.5rem;
        }

        .card-subtitle {
            color: var(--text-secondary);
            margin: 0;
        }

        .card-content {
            padding: 2rem;
        }

        .alert {
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 1.5rem;
            font-weight: 500;
        }

        .alert-success {
            background: rgba(16, 185, 129, 0.1);
            color: var(--success);
            border: 1px solid rgba(16, 185, 129, 0.2);
        }

        .alert-error {
            background: rgba(220, 38, 38, 0.1);
            color: var(--error);
            border: 1px solid rgba(220, 38, 38, 0.2);
        }

        .form {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
        }

        .form-label {
            font-weight: 600;
            color: var(--text);
            font-size: 0.875rem;
        }

        .form-input {
            padding: 0.75rem 1rem;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            transition: all 0.2s;
            background: var(--bg-secondary);
            color: var(--text);
        }

        .form-input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
            background: var(--card);
        }

        .form-textarea {
            min-height: 100px;
            resize: vertical;
        }

        .form-select {
            appearance: none;
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%23a1a1aa' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
            background-position: right 0.5rem center;
            background-repeat: no-repeat;
            background-size: 1.5em 1.5em;
            padding-right: 2.5rem;
        }

        .btn {
            padding: 0.875rem 1.5rem;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
            text-align: center;
        }

        .btn-primary {
            background: var(--primary);
            color: white;
        }

        .btn-primary:hover:not(:disabled) {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-lg);
        }

        .btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }

        .required {
            color: var(--error);
        }

        @media (max-width: 768px) {
            .header-content {
                padding: 1rem;
                flex-direction: column;
                gap: 1rem;
            }

            .nav-links {
                gap: 1rem;
            }

            .nav-link {
                font-size: 0.875rem;
            }

            .main {
                margin: 1rem auto;
                padding: 0 0.5rem;
            }

            .card-content {
                padding: 1.5rem;
            }

            .form-row {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .nav-links {
                flex-wrap: wrap;
                justify-content: center;
            }
        }

        .loading {
            display: inline-block;
            width: 16px;
            height: 16px;
            border: 2px solid transparent;
            border-top: 2px solid currentColor;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin-right: 0.5rem;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }