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ease}body:not(.dark-theme) .registration-card h2{color:#1a1a1a}.registration-card p.description{margin-bottom:2rem;color:#e0e0e0;font-size:1rem;line-height:1.6;transition:color .3s ease}body:not(.dark-theme) .registration-card p.description{color:#333}.registration-card form{display:flex;flex-direction:column;gap:1rem}.registration-card label{font-weight:600;color:var(--text-primary);transition:color .3s ease}.registration-card input{padding:.75rem 1rem;border-radius:8px;border:1px solid var(--card-border);font-size:1rem;transition:border-color .2s ease,box-shadow .2s ease,background-color .3s ease,color .3s ease;background-color:var(--card-bg);color:var(--text-primary)}.registration-card input:focus{border-color:var(--button-primary);box-shadow:0 0 0 3px #0066cc26;outline:none}.registration-card input:invalid{border-color:#dc3545;box-shadow:0 0 0 3px #dc354526}.registration-card button[type=submit]{background-color:var(--button-primary);color:var(--text-primary);border:none;padding:.75rem 1.25rem;border-radius:6px;font-size:1rem;font-weight:500;cursor:pointer;transition:background-color .2s ease}.registration-card button[type=submit]:hover{background-color:var(--button-primary-hover)}.form-message{margin:1rem auto 0;max-width:880px;padding:1rem 1.5rem;border-radius:8px;font-weight:500;border:1px solid transparent}.form-message.info{background-color:#e8f1ff;border-color:#b5d2ff;color:#003c7a}.form-message.success{background-color:#e7f6ec;border-color:#b5e5c9;color:#1b5e20}.form-message.error{background-color:#ffeceb;border-color:#ffc7c2;color:#b71c1c}.error-message{background-color:#b71c1c26;border:2px solid rgba(183,28,28,.4);color:#ff6b6b;padding:1rem 1.5rem;border-radius:8px;margin-bottom:1.5rem;text-align:center;font-size:.95rem;line-height:1.6;transition:background-color .3s ease,border-color .3s ease,color .3s ease;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}body:not(.dark-theme) .error-message{background-color:#ffeceb;border-color:#ffc7c2;color:#b71c1c}body.dark-theme .error-message{background-color:#b71c1c33;border-color:#b71c1c80;color:#f99}.error-message i{font-size:1.2rem;margin-right:.5rem}.error-message strong{display:block;margin-bottom:.5rem;font-size:1rem}.error-message.hidden{display:none}.register-helper{font-size:.9rem;color:#627089}.google-button{display:flex;align-items:center;justify-content:center;gap:.75rem;background-color:#4285f4;color:#fff;padding:1rem 2rem;border-radius:8px;text-decoration:none;font-weight:600;font-size:1rem;transition:all .3s ease;box-shadow:0 2px 8px #4285f466;margin:0 auto 2rem;width:100%;max-width:300px}.google-button:hover{background-color:#357ae8;box-shadow:0 4px 12px #4285f466;transform:translateY(-2px)}.google-button i{font-size:1.25rem}.google-button span{font-size:1rem}.registration-benefits{display:flex;flex-direction:column;gap:1rem;margin-top:2rem;padding-top:2rem;border-top:1px solid var(--card-border);transition:border-color .3s ease}.benefit-item{display:flex;align-items:center;justify-content:center;gap:.75rem;color:#e0e0e0;font-size:.95rem;transition:color .3s ease}body:not(.dark-theme) .benefit-item{color:#333}.benefit-item i{color:#4dd0e1;font-size:1.1rem;flex-shrink:0;transition:color .3s ease}body:not(.dark-theme) .benefit-item i{color:#00acc1}.link-button{background:none;border:none;color:#06c;cursor:pointer;text-decoration:underline;font-size:inherit;padding:0;margin:0}.link-button:hover{color:#0052a3}.register-nav{background-color:var(--nav-bg);padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--nav-border);transition:background-color .3s ease,border-color .3s ease}.register-nav button{background:none;border:none;color:#fff;font-size:1rem;cursor:pointer;padding:.6rem 1rem;border-radius:6px;transition:background-color .2s ease}.register-nav button:hover{background-color:var(--button-primary)}.register-heading{color:var(--text-primary);font-size:1.1rem;font-weight:600}.register-nav #theme-toggle-button{background-color:var(--button-primary);color:#fff;border:none;padding:.5rem 1rem;border-radius:5px;cursor:pointer;font-size:1rem;transition:background-color .3s;display:flex;align-items:center;gap:.5rem}.register-nav #theme-toggle-button:hover{background-color:var(--button-primary-hover)}.register-nav #theme-toggle-button .theme-icon{width:1.1rem;height:1.1rem;display:inline-block;vertical-align:middle}#categories-container{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:1.5rem;width:100%;align-items:stretch;position:relative;z-index:2}.category-tile{background-color:#2a3142bf;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.1);border-radius:8px;padding:1rem 1.5rem;min-width:220px;min-height:180px;text-align:center;cursor:pointer;transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease,background-color .2s ease;color:var(--text-primary);font-weight:400;display:flex;flex-direction:column;justify-content:space-between;align-items:center;position:relative;z-index:2}.category-tile:hover{box-shadow:0 4px 12px var(--shadow);transform:translateY(-2px);border-color:#fff3;background-color:#2a3142d9}.category-tile img{max-width:100%;height:auto;margin-bottom:1rem;border-radius:5px;flex-shrink:0}.category-tile span{flex-grow:1;display:flex;align-items:center;justify-content:center;word-wrap:break-word;-webkit-hyphens:auto;hyphens:auto}#articles-container{margin:2rem auto 0;display:flex;flex-direction:column;gap:1rem;max-width:1200px;position:relative;z-index:2;padding-bottom:2rem}.article-tile{background-color:#2a3142bf;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.1);border-radius:8px;padding:0;width:100%;text-align:left;cursor:pointer;transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease,background-color .25s ease;text-decoration:none;color:var(--text-primary);display:flex;flex-direction:row;align-items:flex-start;gap:0;box-shadow:0 2px 8px var(--shadow-light);overflow:hidden;position:relative;z-index:2;margin-bottom:1rem}#articles-container .article-tile:last-child{margin-bottom:4rem}.article-tile:hover{box-shadow:0 4px 12px 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