/* roulang page: index */
:root {
            --color-primary: #0D5C4D;
            --color-primary-dark: #082B24;
            --color-accent: #E28743;
            --color-bg-light: #F8F9F5;
            --color-card-border: rgba(13, 92, 77, 0.12);
            --shadow-edu: 0 12px 32px -8px rgba(13, 92, 77, 0.08);
            --shadow-hover: 0 20px 40px -10px rgba(13, 92, 77, 0.16);
        }
        body {
            background-color: var(--color-bg-light);
            color: #2D3748;
            letter-spacing: 0.02em;
        }
        .edu-card-shadow {
            box-shadow: var(--shadow-edu);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .edu-card-shadow:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        details summary::-webkit-details-marker {
            display: none;
        }
        details[open] summary svg {
            transform: rotate(180deg);
        }