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var(--border);border-radius:1rem;text-align:center}.prompt-icon{font-size:2rem;margin-bottom:.75rem}.login-prompt h3{font-size:1rem;font-weight:600;color:var(--text-primary);margin-bottom:.5rem}.login-prompt p{font-size:.9rem;color:var(--text-secondary);line-height:1.5}.contact-dialog{position:fixed;top:0;left:0;width:100%;height:100%;padding:1rem;background:transparent;border:none;max-width:100%;max-height:100%}.contact-dialog::backdrop{background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.contact-dialog-content{position:relative;margin:auto;max-width:540px;background:var(--bg-card);border:1px solid var(--border);border-radius:1.5rem;box-shadow:0 25px 50px -12px #0006,0 0 0 1px #ffffff0d inset;animation:dialogSlideIn .3s cubic-bezier(.4,0,.2,1);overflow:hidden}@keyframes dialogSlideIn{0%{opacity:0;transform:scale(.95) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}.contact-dialog-header{position:relative;padding:2rem 2rem 1.5rem;text-align:center;background:linear-gradient(135deg,#ff6b3514,#8b5cf60d);border-bottom:1px solid var(--border)}.contact-dialog-icon{display:inline-flex;align-items:center;justify-content:center;width:60px;height:60px;background:linear-gradient(135deg,var(--accent) 0%,var(--accent-secondary) 100%);border-radius:1rem;font-size:1.75rem;margin-bottom:1rem;box-shadow:0 8px 24px var(--accent-glow)}.contact-dialog-header h2{margin:0 0 .5rem;font-size:1.5rem;font-weight:700;color:var(--text-primary)}.contact-dialog-header p{margin:0;font-size:.95rem;color:var(--text-secondary)}.contact-dialog-close{position:absolute;top:1rem;right:1rem;display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:50%;color:var(--text-secondary);font-size:1rem;cursor:pointer;transition:all .2s ease}.contact-dialog-close:hover{background:var(--error-bg);border-color:var(--error);color:var(--error)}.contact-dialog-close:disabled{opacity:.5;cursor:not-allowed}.contact-form{padding:1.5rem 2rem 2rem;display:flex;flex-direction:column;gap:1.25rem}.contact-form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.contact-form select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238888a0' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 1rem center;padding-right:2.5rem}.contact-form select,.contact-form textarea{padding:.875rem 1rem;background:var(--bg-input);border:1px solid var(--border);border-radius:.75rem;color:var(--text-primary);font-family:inherit;font-size:1rem;transition:all .2s ease;resize:vertical}.contact-form select:focus,.contact-form textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.contact-form select:disabled,.contact-form textarea:disabled{opacity:.6;cursor:not-allowed}.contact-form textarea{min-height:120px}.contact-form-actions{display:flex;gap:1rem;margin-top:.5rem}.contact-form-actions button{flex:1}.contact-success{padding:3rem 2rem;text-align:center}.contact-success-icon{font-size:3rem;margin-bottom:1.5rem}.contact-success h3{margin:0 0 1rem;font-size:1.5rem;font-weight:700;color:var(--success)}.contact-success p{margin:0 0 2rem;color:var(--text-secondary);line-height:1.6}.btn-contact-float{position:fixed;bottom:1.5rem;left:1.5rem;display:flex;align-items:center;gap:.5rem;padding:.75rem 1.25rem;background:linear-gradient(135deg,var(--accent-secondary) 0%,#6d28d9 100%);border:none;border-radius:2rem;color:#fff;font-family:inherit;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 16px var(--accent-secondary-glow);z-index:50}.btn-contact-float:hover{transform:translateY(-2px) scale(1.02);box-shadow:0 8px 24px var(--accent-secondary-glow)}.btn-contact-float:active{transform:scale(.98)}.btn-contact-float .contact-icon{font-size:1.1rem;line-height:1}@media(max-width:400px){.btn-contact-float{padding:.875rem;border-radius:50%;width:48px;height:48px;justify-content:center}.btn-contact-float .contact-text{display:none}}@media(max-width:768px){.navbar{padding:1rem}.navbar-menu{gap:.75rem}.nav-link{padding:.5rem;font-size:.85rem}.nav-user{display:none}.main-content{padding:1rem}.btn-theme-float{width:42px;height:42px;top:4.5rem;right:1rem}.btn-theme-float .theme-icon{font-size:1.1rem}.btn-contact-float{bottom:1rem;left:1rem;padding:.625rem 1rem;font-size:.85rem}.theme-options{flex-direction:column}.contact-form-row{grid-template-columns:1fr}.contact-dialog-content{border-radius:1rem}.contact-dialog-header{padding:1.5rem 1.5rem 1.25rem}.contact-form{padding:1.25rem 1.5rem 1.5rem}}@media(max-width:600px){.auth-card{padding:1.5rem;border-radius:1rem}.auth-header h1{font-size:1.5rem}.profile-info{grid-template-columns:1fr}.delete-actions{flex-direction:column}.welcome-section h1{font-size:1.5rem}.scientific-buttons{grid-template-columns:repeat(4,1fr)}.sci-btn{padding:.6rem .25rem;font-size:.75rem}.display{font-size:2rem}.history-header{flex-wrap:wrap;gap:.75rem}.history-filters{flex-direction:column}.filter-group{min-width:100%}.filter-reset-btn{align-self:stretch;text-align:center}.history-item{flex-direction:column;align-items:flex-start;gap:.5rem}.history-item-content{flex-wrap:wrap;width:100%}.history-item-actions{width:100%;justify-content:space-between;padding-top:.5rem;border-top:1px solid var(--border)}.history-delete-btn{opacity:1}.history-action-btn{width:28px;height:28px;font-size:.8rem}}