:root {
            --background: #ffffff;
            --foreground: #09090b;
            --border: #e4e4e7;
            --input: #e4e4e7;
            --primary: #18181b;
            --primary-foreground: #fafafa;
            --danger: #ef4444;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background-color: var(--background);
            color: var(--foreground);
            margin: 0;
            padding: 0;
            line-height: 1.5;
        }

        .container {
            max-width: 800px;
            margin: 40px auto;
            padding: 0 20px;
        }

        /* Типографика */
        h1,
        h2,
        h3 {
            font-weight: 600;
            letter-spacing: -0.025em;
            margin-bottom: 1rem;
        }

        a {
            color: var(--foreground);
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        a:hover {
            text-decoration: none;
        }

        /* Кнопки */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 500;
            padding: 8px 16px;
            text-decoration: none;
            cursor: pointer;
            border: 1px solid transparent;
            transition: opacity 0.2s;
        }

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

        .btn-outline {
            border-color: var(--border);
            background: transparent;
        }

        .btn-danger {
            background-color: var(--danger);
            color: white;
            border: none;
        }

        .btn:hover {
            opacity: 0.9;
        }

        /* Таблицы */
        table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 1rem;
            font-size: 14px;
        }

        th,
        td {
            border-bottom: 1px solid var(--border);
            padding: 12px;
            text-align: left;
        }

        th {
            font-weight: 500;
            color: #71717a;
        }

        /* Формы */
        .form-group {
            margin-bottom: 1rem;
        }

        label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 6px;
        }

        input {
            width: 100%;
            padding: 8px 12px;
            border-radius: 6px;
            border: 1px solid var(--input);
            font-size: 14px;
            box-sizing: border-box;
        }

        input:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .error {
            color: var(--danger);
            font-size: 12px;
            margin-top: 4px;
        }

        /* Уведомления */
        .alert {
            padding: 12px;
            border: 1px solid var(--border);
            border-radius: 6px;
            margin-bottom: 20px;
            background: #f4f4f5;
            font-size: 14px;
        }