/* RESET & BASE STYLES */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
        }

        :root {
            --primary-color: #2563eb;
            --primary-hover: #1d4ed8;
            --bg-body: #f8fafc;
            --bg-sidebar: #ffffff;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --card-bg: #ffffff;
            --sidebar-width: 260px;
        }

        body {
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.6;
        }

        /* LAYOUT */
        .container {
            display: flex;
            min-height: 100vh;
        }

        /* SIDEBAR */
        .sidebar {
            width: var(--sidebar-width);
            background: var(--bg-sidebar);
            border-right: 1px solid var(--border-color);
            padding: 2rem 1.5rem;
            position: fixed;
            height: 100vh;
            transition: all 0.3s ease;
            z-index: 100;
        }

        .logo {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary-color);
            letter-spacing: -0.5px;
            margin-bottom: 2.5rem;
            padding-left: 0.75rem;
        }

        .sidebar nav ul {
            list-style: none;
        }

        .sidebar nav ul li {
            margin-bottom: 0.5rem;
        }

        .sidebar nav ul li a {
            text-decoration: none;
            color: var(--text-muted);
            font-weight: 500;
            padding: 0.75rem 1rem;
            display: block;
            border-radius: 8px;
            transition: all 0.2s;
        }

        .sidebar nav ul li a:hover {
            background: #f1f5f9;
            color: var(--primary-color);
        }

        /* MAIN CONTENT */
        .content {
            flex: 1;
            margin-left: var(--sidebar-width);
            padding: 2.5rem;
            max-width: 1200px;
        }

        /* BANNER */
        .banner {
            margin-bottom: 3rem;
        }

        .banner h1 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-main);
        }

        .banner p {
            color: var(--text-muted);
            font-size: 1.1rem;
        }

        /* GRID CARDS */
        .grid-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
            margin-bottom: 3.5rem;
        }

        .card {
            background: var(--card-bg);
            padding: 1.5rem;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            transition: transform 0.2s, box-shadow 0.2s;
            position: relative;
        }

        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
        }

        .badge {
            display: inline-block;
            background: #dbeafe;
            color: var(--primary-color);
            font-size: 0.75rem;
            font-weight: 700;
            padding: 2px 8px;
            border-radius: 6px;
            margin-bottom: 1rem;
        }

        .card h3 {
            margin-bottom: 0.75rem;
            font-size: 1.1rem;
        }

        .card p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* FORM STYLES */
        .form-container {
            background: var(--card-bg);
            padding: 2.5rem;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            box-shadow: 0 1px 3px rgba(0,0,0,0.02);
        }

        .form-container h2 {
            margin-bottom: 2rem;
            font-size: 1.5rem;
            border-left: 4px solid var(--primary-color);
            padding-left: 1rem;
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.5rem;
            font-size: 0.9rem;
            color: var(--text-main);
        }

        .form-group input[type="text"],
        .form-group input[type="password"],
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            background: #fcfcfc;
            transition: border-color 0.2s, box-shadow 0.2s;
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
            background: #fff;
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }

        .options {
            display: flex;
            gap: 1.5rem;
            padding-top: 0.5rem;
        }

        .options label {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 400;
            cursor: pointer;
        }

        .file-input {
            padding: 0.5rem 0;
        }

        .form-actions {
            display: flex;
            gap: 1rem;
            margin-top: 2rem;
        }

        button {
            padding: 0.75rem 1.5rem;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
            border: none;
            font-size: 0.95rem;
        }

        .btn-submit {
            background: var(--primary-color);
            color: white;
            flex: 2;
        }

        .btn-submit:hover {
            background: var(--primary-hover);
        }

        .btn-reset {
            background: #f1f5f9;
            color: var(--text-muted);
            flex: 1;
        }

        .btn-reset:hover {
            background: #e2e8f0;
            color: var(--text-main);
        }

        /* RESPONSIVE */
        @media (max-width: 992px) {
            .sidebar {
                width: 80px;
                padding: 2rem 0.5rem;
                text-align: center;
            }
            .logo {
                font-size: 0.8rem;
                padding-left: 0;
            }
            .sidebar nav ul li a span {
                display: none;
            }
            .content {
                margin-left: 80px;
            }
        }

        @media (max-width: 768px) {
            .container {
                flex-direction: column;
            }
            .sidebar {
                width: 100%;
                height: auto;
                position: relative;
                padding: 1rem;
            }
            .logo {
                margin-bottom: 1rem;
            }
            .sidebar nav ul {
                display: flex;
                justify-content: space-around;
            }
            .content {
                margin-left: 0;
                padding: 1.5rem;
            }
            .form-row {
                grid-template-columns: 1fr;
            }
        }