@media (max-width:768px){.btn-check-username{font-size:.75rem;padding:12px 4px}.btn-check-username .me-1{display:none}}.btn-check-username{background:linear-gradient(135deg,#a7b5c4 0%,#8492a6 100%);border:none;border-radius:10px;color:#fff;font-weight:600;font-size:.875rem;padding:12px 8px;transition:all 0.3s ease;box-shadow:0 2px 8px rgb(167 181 196 / .2)}.btn-check-username:hover{background:linear-gradient(135deg,#8492a6 0%,#6b7894 100%);transform:translateY(-1px);box-shadow:0 4px 12px rgb(132 146 166 / .3);color:#fff}.btn-check-username:disabled{background:linear-gradient(135deg,#d1d8e0 0%,#a7b5c4 100%);cursor:not-allowed;transform:none;box-shadow:none;color:#6b7894}.username-available{color:#10b981!important;font-weight:600}.username-taken{color:#ef4444!important;font-weight:600}.username-checking{color:#3b82f6!important;font-weight:600}.username-error{color:#f59e0b!important;font-weight:600}.input-available{border-color:#10b981!important;box-shadow:0 0 0 3px rgb(16 185 129 / .1)!important}.input-taken{border-color:#ef4444!important;box-shadow:0 0 0 3px rgb(239 68 68 / .1)!important}.registration-card{border:none;border-radius:var(--border-radius,12px);box-shadow:var(--shadow-heavy,0 8px 32px rgb(0 0 0 / .15));background:#fff;overflow:hidden;transition:all 0.3s ease;margin-bottom:2rem}.registration-card-header{background:var(--gradient-primary,linear-gradient(135deg,#667eea 0%,#764ba2 100%));color:#fff;padding:2rem;border-bottom:none}.registration-card-header h3{font-weight:700;margin-bottom:.5rem;font-size:1.75rem}.registration-card-header hr{border-color:rgb(255 255 255 / .3);margin:1rem 0}.registration-card-header small{color:rgb(255 255 255 / .9);font-size:1rem;font-weight:500}.registration-card-body{padding:2rem}.info-box-modern{background:linear-gradient(135deg,#f8fbff 0%,#ebf4ff 100%);border:1px solid rgb(59 130 246 / .2);border-left:4px solid #3b82f6;border-radius:var(--border-radius,12px);padding:1.5rem;margin:1.5rem 0;box-shadow:var(--shadow-light,0 2px 8px rgb(0 0 0 / .05))}.info-box-modern h6{color:#1e40af;margin-bottom:1rem;font-weight:600;font-size:1.1rem;display:flex;align-items:center;gap:.5rem}.info-box-modern ul.custom-list{list-style:none;padding-left:0;margin-bottom:0}.info-box-modern ul.custom-list li{margin-bottom:1rem;line-height:1.6;position:relative;padding-left:1.5rem}.info-box-modern ul.custom-list li:before{content:"✓";position:absolute;left:0;top:0;color:#10b981;font-weight:700;font-size:1.1rem}.feature-highlight-modern{background:linear-gradient(135deg,#fef3c7 0%,#fde68a 100%);border:1px solid rgb(251 191 36 / .3);border-left:4px solid #f59e0b;padding:1.5rem;margin:1.5rem 0;border-radius:var(--border-radius,12px);box-shadow:var(--shadow-light,0 2px 8px rgb(0 0 0 / .05))}.highlight-box-modern{margin-top:1.5rem;padding:1.5rem;background:linear-gradient(135deg,#f1f5f9 0%,#e2e8f0 100%);border:1px solid rgb(71 85 105 / .2);border-left:4px solid #475569;border-radius:var(--border-radius,12px);font-size:.95rem;line-height:1.7;color:#334155;font-style:italic;box-shadow:var(--shadow-light,0 2px 8px rgb(0 0 0 / .05))}.form-control-modern,.form-select-modern{border:2px solid #e2e8f0;border-radius:10px;padding:12px 16px;font-weight:500;transition:all 0.3s ease;background:#fff;font-size:1rem}.form-control-modern:focus,.form-select-modern:focus{border-color:var(--primary-color,#2c5aa0);box-shadow:0 0 0 3px rgb(44 90 160 / .1);transform:translateY(-1px);outline:none}.form-label-modern{font-weight:600;color:var(--dark-color,#2d3748);margin-bottom:.75rem;font-size:1rem}.form-text-modern{color:#6b7280;font-size:.875rem;margin-top:.5rem;font-weight:500}.birth-time-group-modern{display:flex;gap:1rem;align-items:center;flex-wrap:wrap;padding:1rem;background:#f8fafc;border-radius:10px;border:1px solid #e2e8f0}.birth-time-group-modern select,.birth-time-group-modern input{min-width:100px;flex:1}.birth-time-separator{font-size:1.5rem;font-weight:700;color:#4b5563}.btn-register{background:var(--gradient-success,linear-gradient(135deg,#11998e 0%,#38ef7d 100%));border:none;border-radius:12px;padding:16px 32px;font-weight:600;font-size:1.1rem;color:#fff;transition:all 0.3s ease;box-shadow:0 6px 20px rgb(17 153 142 / .3);position:relative;overflow:hidden}.btn-register:hover{transform:translateY(-3px);box-shadow:0 8px 25px rgb(17 153 142 / .4);color:#fff}.btn-register:before{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgb(255 255 255 / .2),transparent);transition:left 0.5s ease}.btn-register:hover:before{left:100%}h1{font-size:1.5em}.section-header-modern{color:var(--primary-color,#2c5aa0);font-weight:700;font-size:1.25rem;margin-bottom:1.5rem;margin-top:2rem;position:relative;padding-bottom:.5rem}.section-header-modern:after{content:'';position:absolute;bottom:0;left:0;width:50px;height:3px;background:var(--gradient-primary,linear-gradient(135deg,#667eea 0%,#764ba2 100%));border-radius:2px}.text-danger{color:#ef4444!important;font-weight:700}.login-link-section{background:linear-gradient(135deg,#f8fafc 0%,#e2e8f0 100%);border-radius:12px;padding:1.5rem;text-align:center;margin-top:2rem;border:1px solid #e2e8f0}.login-link-section a{color:var(--primary-color,#2c5aa0);text-decoration:none;font-weight:700;transition:all 0.3s ease;padding:.25rem .5rem;border-radius:6px}.login-link-section a:hover{background:var(--primary-color,#2c5aa0);color:#fff;transform:translateY(-1px)}.benefits-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1rem;margin-top:1rem}.benefit-item{background:#f8fafc;padding:1rem;border-radius:8px;border-left:3px solid #10b981}.benefit-item ul{margin:0;padding-left:1.5rem}.benefit-item li{line-height:1.6;color:#4b5563;font-weight:500}@media (max-width:768px){.registration-card-header,.registration-card-body{padding:1.5rem}.birth-time-group-modern{flex-direction:column;align-items:stretch;gap:.75rem}.birth-time-group-modern select,.birth-time-group-modern input{width:100%;min-width:auto}.birth-time-separator{display:none}.section-header-modern{font-size:1.1rem}}.animate-fade-in{animation:fadeIn 0.6s ease-out}@keyframes fadeIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}