.nc-signup {
    max-width: 640px;
    margin: 0 auto;
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
    font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, sans-serif;
}
.nc-signup-rainbow {
    height: 5px;
    background: linear-gradient(90deg, #E40303, #FF8C00, #FFED00, #008026, #24408E, #732982);
}
.nc-signup-header {
    background: linear-gradient(135deg, #1a0533 0%, #2d0054 50%, #4a0080 100%);
    padding: 36px 40px 32px;
    text-align: center;
}
.nc-signup-title {
    margin: 0 0 8px;
    font-size: 28px;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.02em;
}
.nc-signup-subtitle {
    margin: 0;
    font-size: 15px;
    color: rgba(255,255,255,0.6);
    font-weight: 400;
}
.nc-signup-body {
    padding: 32px 40px 28px;
}
.nc-signup-desc {
    margin: 0 0 24px;
    font-size: 15px;
    line-height: 1.7;
    color: #4b5563;
}
.nc-signup-fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 24px;
}
.nc-signup-field input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    font-size: 15px;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
    font-family: inherit;
}
.nc-signup-field input:focus {
    outline: none;
    border-color: #7500CC;
    box-shadow: 0 0 0 4px rgba(117,0,204,0.1);
}
.nc-signup-field input::placeholder {
    color: #9ca3af;
}
.nc-signup-lists {
    margin-bottom: 28px;
}
.nc-signup-lists-label {
    margin: 0 0 14px;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #7500CC;
}
.nc-signup-list {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 16px;
    margin-bottom: 8px;
    border: 2px solid #f3f4f6;
    border-radius: 10px;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}
.nc-signup-list:hover {
    border-color: #e5e7eb;
    background: #faf5ff;
}
.nc-signup-list input {
    display: none;
}
.nc-signup-list input:checked ~ .nc-signup-check {
    background: #7500CC;
    border-color: #7500CC;
}
.nc-signup-list input:checked ~ .nc-signup-check::after {
    content: '';
    display: block;
    width: 5px;
    height: 9px;
    border: solid #fff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    margin: 2px 0 0 1px;
}
.nc-signup-list input:checked ~ .nc-signup-list-info .nc-signup-list-name {
    color: #7500CC;
}
.nc-signup-check {
    width: 20px;
    height: 20px;
    min-width: 20px;
    border: 2px solid #d1d5db;
    border-radius: 5px;
    margin-top: 1px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}
.nc-signup-list-locked .nc-signup-check {
    background: #7500CC;
    border-color: #7500CC;
}
.nc-signup-list-locked .nc-signup-check::after {
    content: '';
    display: block;
    width: 5px;
    height: 9px;
    border: solid #fff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    margin: 2px 0 0 1px;
}
.nc-signup-list-locked {
    border-color: #ede9fe;
    background: #faf5ff;
}
.nc-signup-list-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.nc-signup-list-name {
    font-size: 15px;
    font-weight: 600;
    color: #1e1e1e;
    transition: color 0.15s;
}
.nc-signup-list-desc {
    font-size: 13px;
    color: #6b7280;
    line-height: 1.5;
}
.nc-signup-tag {
    display: inline-block;
    background: #7500CC;
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 10px;
    margin-left: 6px;
    vertical-align: middle;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.nc-signup-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 16px 24px;
    background: linear-gradient(135deg, #7500CC 0%, #9333ea 100%);
    color: #fff;
    border: none;
    border-radius: 12px;
    font-size: 17px;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.2s;
    font-family: inherit;
}
.nc-signup-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(117,0,204,0.3);
}
.nc-signup-btn:active {
    transform: translateY(0);
}
.nc-signup-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}
.nc-signup-privacy {
    margin: 16px 0 0;
    text-align: center;
    font-size: 12px;
    color: #9ca3af;
}
.nc-signup-success {
    padding: 60px 40px;
    text-align: center;
}
.nc-signup-success-icon {
    font-size: 48px;
    margin-bottom: 16px;
}
.nc-signup-success h2 {
    margin: 0 0 12px;
    font-size: 24px;
    font-weight: 700;
    color: #1e1e1e;
}
.nc-signup-success p {
    margin: 0;
    color: #6b7280;
    font-size: 16px;
    line-height: 1.6;
}
@media (max-width: 600px) {
    .nc-signup-header { padding: 28px 24px 24px; }
    .nc-signup-body { padding: 24px; }
    .nc-signup-title { font-size: 22px; }
    .nc-signup-fields { grid-template-columns: 1fr; }
}