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var(--transition-base)}.back-home{position:fixed;top:20px;left:20px;z-index:var(--z-fixed);background:#fffffff2;color:#333;padding:10px 20px;border-radius:8px;font-weight:600;font-size:.95rem;box-shadow:0 4px 12px #00000026;transition:all .3s ease;text-decoration:none;display:inline-flex;align-items:center;gap:8px}.back-home:hover{background:#667eea;color:#fff;transform:translateY(-2px);box-shadow:0 6px 16px #667eea66}@media(max-width:767px){.back-home{top:10px;left:10px;padding:8px 14px;font-size:.85rem}}.comment-form{background:var(--color-surface, #f8f9fa);padding:var(--spacing-xl, 3rem);border-radius:var(--radius-lg, 12px);box-shadow:var(--shadow-md, 0 4px 6px rgba(0,0,0,.1));margin-top:var(--spacing-xl, 3rem);margin-bottom:var(--spacing-xl, 3rem);max-width:800px;margin-left:auto;margin-right:auto}.comment-form h3{font-size:var(--font-size-xl, 1.5rem);font-weight:var(--font-weight-bold, 700);color:var(--color-primary, #333);margin-bottom:var(--spacing-lg, 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