/* --- main.css --- */
.main-content { flex-grow: 1; height: 100vh; padding: 48px 64px; overflow-y: auto; }
.content-unit { display: none; } .content-unit.active { display: block; animation: fadeIn 0.5s ease-out; }
.content-header h2 { font-size: 2.25rem; font-weight: 900; color: var(--text-main); line-height: 1.3; }
.content-header p { font-size: 1.125rem; color: #495057; margin-top: 0.75rem; line-height: 1.7; }
.keywords-grid { margin-top: 2.5rem; display: flex; flex-wrap: wrap; gap: 0.75rem; }
.keyword-tag { background-color: var(--keyword-bg); color: var(--keyword-text); padding: 0.5rem 1rem; border-radius: 9999px; font-size: 0.9rem; font-weight: 500; }
.visual-summary { margin-top: 3rem; background-color: var(--bg-white); padding: 2.5rem; border-radius: 1rem; border: 1px solid var(--border-color); box-shadow: 0 4px 12px rgba(0,0,0,0.05); }
.visual-summary h3 { font-size: 1.5rem; font-weight: 700; color: var(--text-main); margin-bottom: 2rem; }
.visual-summary p { font-size: 1.1rem; line-height: 1.8; }
.button-group { margin-top: 2.5rem; display: flex; gap: 1rem; flex-wrap: wrap; }
.btn { display: flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.75rem 1.5rem; border-radius: 0.5rem; font-size: 1rem; font-weight: 700; text-decoration: none; transition: all 0.2s ease; border: none; box-shadow: 0 4px 6px rgba(0,0,0,0.1); }
.btn:hover { transform: translateY(-2px); box-shadow: 0 7px 14px rgba(0,0,0,0.1); } .btn:active { transform: translateY(0); box-shadow: 0 4px 6px rgba(0,0,0,0.1); }
.btn-primary { background-color: var(--primary-blue); color: white; } .btn-primary:hover { background-color: var(--primary-blue-dark); }
.btn-secondary { background-color: #e9ecef; color: #495057; } .btn-secondary:hover { background-color: #ced4da; }
.info-box { text-align: left; background-color: #f8f9fa; border-left: 5px solid var(--primary-blue); padding: 1.5rem; border-radius: 0.5rem; }
.info-box ul { list-style-type: disc; padding-left: 1.25rem; }