* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: white; min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 20px; }
.container { background: white; border-radius: 20px; padding: 50px 40px; max-width: 500px; width: 100%; box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2); }
.title { font-size: 28px; font-weight: 700; color: #111827; margin-bottom: 12px; text-align: center; }
.title-sub { font-size: 16px; font-weight: 600; color: #6b7280; letter-spacing: 1px; }
.subtitle { font-size: 14px; color: #6b7280; margin-bottom: 40px; text-align: center; }
.form-group { margin-bottom: 20px; }
label { display: block; font-size: 14px; font-weight: 700; color: #374151; letter-spacing: 0.5px; margin-bottom: 10px; }
.password-wrapper { position: relative; width: 100%; }
input { width: 100%; padding: 14px 16px; border: 2px solid #e5e7eb; border-radius: 12px; font-size: 16px; font-weight: 500; color: #111827; background: #f9fafb; transition: all 0.2s; font-family: inherit; }
input:focus { outline: none; border-color: #2563eb; background: white; box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1); }
input::placeholder { color: #d1d5db; }
.toggle-password { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); background: none; border: none; cursor: pointer; padding: 4px 8px; color: #6b7280; font-size: 18px; transition: color 0.2s; }
.toggle-password:hover { color: #374151; }
.email-input-wrapper { display: flex; align-items: center; gap: 0; }
.email-input-wrapper input { flex: 1; border-radius: 12px 0 0 12px; border-right: none; }
.email-suffix { padding: 14px 16px; background: #e5e7eb; border: 2px solid #e5e7eb; border-left: none; border-radius: 0 12px 12px 0; font-size: 15px; font-weight: 600; color: #374151; white-space: nowrap; line-height: 1; }
.email-input-wrapper input:focus + .email-suffix { border-color: #2563eb; }
.help-text { font-size: 12px; color: #6b7280; margin-top: 8px; margin-bottom: 0; line-height: 1.6; }
.help-text-item { margin-bottom: 4px; }
.account-error { font-size: 12px; color: #dc2626; margin-top: 6px; line-height: 1.8; }
input.input-error { border-color: #dc2626 !important; background: #fff5f5 !important; }
.error-message { font-size: 12px; color: #dc2626; margin-top: 6px; display: none; }
.error-message.show { display: block; }
.validation-alert { background: #fef2f2; border: 1px solid #fecaca; border-radius: 8px; padding: 12px; margin-bottom: 16px; font-size: 13px; color: #dc2626; line-height: 1.5; }
.validation-alert-item { margin-bottom: 6px; }
.validation-alert-item:last-child { margin-bottom: 0; }
.btn { width: 100%; padding: 14px 24px; background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%); color: white; border: none; border-radius: 12px; font-size: 15px; font-weight: 700; cursor: pointer; transition: all 0.2s; box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3); text-transform: uppercase; letter-spacing: 0.5px; margin-top: 10px; }
.btn:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; pointer-events: auto !important; }
.btn-secondary { background: #e5e7eb; color: #374151; box-shadow: none; }
.btn-secondary:hover:not(:disabled) { background: #d1d5db; }
.btn-free { background: linear-gradient(135deg, #10b981 0%, #059669 100%); box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3); }
.btn-free:hover:not(:disabled) { box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4); }
.btn-upgrade { background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%); display: inline-block; width: auto; padding: 10px 24px; font-size: 13px; text-decoration: none; margin-top: 12px; }
.loader { display: none; text-align: center; margin-top: 20px; }
.spinner { width: 24px; height: 24px; border: 3px solid #e5e7eb; border-top-color: #10b981; border-radius: 50%; animation: spin 0.8s linear infinite; margin: 0 auto 10px; }
@keyframes spin { to { transform: rotate(360deg); } }
.loader-text { font-size: 13px; color: #6b7280; }
.signup-form { display: none; margin-top: 40px; padding-top: 40px; border-top: 2px solid #e5e7eb; animation: slideDown 0.3s ease-out; }
.signup-form.show { display: block; }
.strength-meter { height: 6px; background: #e5e7eb; border-radius: 3px; margin-top: 8px; overflow: hidden; }
.strength-bar { height: 100%; width: 0%; border-radius: 3px; transition: all 0.3s; }
.strength-bar.weak { background: #ef4444; width: 33%; }
.strength-bar.medium { background: #f59e0b; width: 66%; }
.strength-bar.strong { background: #10b981; width: 100%; }
.checkbox-group { display: flex; align-items: center; margin-bottom: 24px; gap: 8px; }
input[type="checkbox"] {
    -webkit-appearance: none; appearance: none;
    width: 18px !important; height: 18px !important; min-height: 0;
    padding: 0 !important; margin: 0; flex-shrink: 0; cursor: pointer;
    border: 1.5px solid #9ca3af !important; border-radius: 3px;
    background: #fff !important; box-shadow: none !important;
    display: inline-grid; place-content: center;
}
input[type="checkbox"]:focus { box-shadow: none !important; }
input[type="checkbox"]::after {
    content: ''; width: 10px; height: 10px;
    clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%);
    background: #fff; transform: scale(0); transition: transform 0.1s ease;
}
input[type="checkbox"]:checked { background: #10b981 !important; border-color: #10b981 !important; }
input[type="checkbox"]:checked::after { transform: scale(1); }
.checkbox-label { font-size: 14px; color: #374151; font-weight: 500; line-height: 1; margin-bottom: 0; }
.checkbox-label a { color: #2563eb; text-decoration: none; border-bottom: 2px solid #2563eb; }
.form-section-title { font-size: 16px; font-weight: 700; color: #111827; margin-bottom: 24px; }
.result-box { display: none; margin-top: 20px; }
.result-box.show { display: block; }
.result-item { padding: 16px; margin-bottom: 8px; border-radius: 8px; font-size: 18px; font-weight: 500; text-align: center; }
.result-item.available { background: #d1fae5; color: #065f46; border: 1px solid #6ee7b7; }
.result-item.unavailable { background: #fee2e2; color: #7f1d1d; border: 1px solid #fca5a5; }
.confirmation-page, .complete-page { text-align: center; display: none; }
.confirmation-page.show, .complete-page.show { display: block; }
.free-note { background: #eff6ff; border: 1px solid #93c5fd; border-radius: 8px; padding: 12px 16px; font-size: 13px; color: #1e40af; margin-bottom: 16px; text-align: center; line-height: 1.6; }
.complete-box { background: #f3f4f6; padding: 20px; border-radius: 12px; margin-bottom: 30px; text-align: left; }
.account-group { background: #e5e7eb; padding: 12px; border-radius: 6px; margin-bottom: 12px; }
.account-group-title { font-weight: 600; font-size: 18px; margin-bottom: 4px; }
.upgrade-box { background: #eff6ff; border: 1px solid #93c5fd; border-radius: 12px; padding: 20px; margin-bottom: 20px; text-align: center; }
.upgrade-title { font-size: 15px; font-weight: 700; color: #1e40af; margin-bottom: 4px; }
.upgrade-desc { font-size: 13px; color: #3b82f6; }
.site-footer { margin-top: 24px; text-align: center; font-size: 13px; }
.site-footer a { color: #6b7280; text-decoration: none; border-bottom: 1px solid #d1d5db; }
.site-footer a:hover { color: #374151; }
@keyframes slideDown { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }