.signup-section {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 300px);
    padding: 60px 20px;
}

.signup-card {
    background: var(--bg-primary);
    border-radius: 12px;
    box-shadow: 0 4px 20px var(--shadow-color);
    padding: 50px 40px;
    width: 100%;
    max-width: 500px;
}

.signup-title,
.signup-header {
    text-align: center;
    margin-bottom: 35px;
}

.signup-title h2,
.signup-header h2 {
    font-size: 28px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.signup-title p,
.signup-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.signup-form .form-group,
.form-group {
    margin-bottom: 20px;
}

.signup-form label,
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.signup-form label .required,
.form-group label .required {
    color: var(--discount-color);
    margin-left: 2px;
}

.signup-form input[type="text"],
.signup-form input[type="password"],
.signup-form input[type="email"],
.signup-form input[type="date"],
.signup-form select,
.form-group input,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.signup-form input:focus,
.signup-form select:focus,
.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--btn-primary-bg);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.signup-form input::placeholder,
.form-group input::placeholder {
    color: var(--text-muted);
}

.form-group input.error {
    border-color: var(--discount-color);
}

.form-group input.success {
    border-color: var(--badge-success);
}

.input-with-btn {
    display: flex;
    gap: 10px;
}

.input-with-btn input {
    flex: 1;
}

.btn-check {
    padding: 14px 20px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
}

.btn-check:hover {
    background: var(--text-muted);
}

.form-row {
    display: flex;
    gap: 20px;
}

.form-row .form-group {
    flex: 1;
}

.msg,
.validation-msg {
    display: block;
    margin-top: 6px;
    font-size: 12px;
}

.msg.success,
.validation-msg.success {
    color: var(--badge-success);
}

.msg.error,
.validation-msg.error {
    color: var(--discount-color);
}

.btn-signup,
.btn-submit {
    width: 100%;
    padding: 15px;
    background: var(--btn-primary-bg);
    color: var(--text-white);
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
    margin-top: 10px;
}

.btn-signup:hover,
.btn-submit:hover {
    background: var(--btn-primary-hover);
}

.btn-signup:disabled,
.btn-submit:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
}

.divider {
    display: flex;
    align-items: center;
    margin: 30px 0;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.divider span {
    padding: 0 15px;
    color: var(--text-muted);
    font-size: 13px;
}

.login-link {
    text-align: center;
}

.login-link p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 15px;
}

.btn-login-link {
    display: inline-block;
    width: 100%;
    padding: 14px;
    background: var(--bg-primary);
    color: var(--nav-bg);
    border: 2px solid var(--nav-bg);
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    transition: all 0.3s;
}

.btn-login-link:hover {
    background: var(--nav-bg);
    color: var(--text-white);
}

/* 소셜 회원가입 전용 */
.provider-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 15px;
}

.provider-badge.KAKAO {
    background: #FEE500;
    color: #000;
}

.provider-badge.NAVER {
    background: #03C75A;
    color: var(--text-white);
}

.provider-badge.GOOGLE {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.profile-preview {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 12px;
    margin-bottom: 25px;
}

.profile-image {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--border-color);
}

.profile-info {
    flex: 1;
}

.profile-name {
    font-weight: 600;
    font-size: 16px;
    margin-bottom: 4px;
}

.profile-email {
    color: var(--text-secondary);
    font-size: 14px;
}

.terms-section {
    margin-top: 20px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
}

.terms-section h4 {
    font-size: 14px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.checkbox-label a {
    color: var(--link-color);
    text-decoration: none;
}

.checkbox-label a:hover {
    text-decoration: underline;
}

.error-message {
    background: var(--alert-error-bg, #fee);
    border: 1px solid var(--alert-error-border, #fcc);
    color: var(--alert-error-text, #c0392b);
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    text-align: center;
}

.cancel-link {
    display: block;
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 14px;
    text-decoration: none;
}

.cancel-link:hover {
    color: var(--text-primary);
}

/* 다크 모드 */
body.dark-mode .signup-card {
    background: #2c3e50;
}
body.dark-mode .signup-title h2,
body.dark-mode .signup-header h2 {
    color: #ecf0f1;
}
body.dark-mode .signup-title p,
body.dark-mode .signup-header p {
    color: #95a5a6;
}
body.dark-mode .signup-form label,
body.dark-mode .form-group label {
    color: #ecf0f1;
}
body.dark-mode .signup-form input,
body.dark-mode .signup-form select,
body.dark-mode .form-group input,
body.dark-mode .form-group select {
    background: #34495e;
    border-color: #34495e;
    color: #ecf0f1;
}
body.dark-mode .btn-check {
    background: #34495e;
    border-color: #34495e;
    color: #ecf0f1;
}
body.dark-mode .divider::before,
body.dark-mode .divider::after {
    background: #34495e;
}
body.dark-mode .login-link p {
    color: #95a5a6;
}
body.dark-mode .btn-login-link {
    background: #34495e;
    border-color: #95a5a6;
    color: #ecf0f1;
}
body.dark-mode .profile-preview,
body.dark-mode .terms-section {
    background: #34495e;
}
body.dark-mode .terms-section h4 {
    color: #ecf0f1;
}
body.dark-mode .checkbox-label {
    color: #bdc3c7;
}

@media (max-width: 480px) {
    .signup-card {
        padding: 40px 25px;
    }

    .form-row {
        flex-direction: column;
        gap: 0;
    }

    .input-with-btn {
        flex-direction: column;
    }

    .btn-check {
        width: 100%;
    }
}

@media (max-width: 400px) {
    .signup-section {
        padding: 30px 12px;
    }

    .signup-card {
        padding: 30px 20px;
        border-radius: 8px;
    }

    .signup-title h2,
    .signup-header h2 {
        font-size: 24px;
    }

    .signup-title p,
    .signup-header p {
        font-size: 13px;
    }

    .signup-form .form-group,
    .form-group {
        margin-bottom: 16px;
    }

    .signup-form input[type="text"],
    .signup-form input[type="password"],
    .signup-form input[type="email"],
    .signup-form input[type="date"],
    .signup-form select,
    .form-group input,
    .form-group select {
        padding: 12px 14px;
        font-size: 14px;
    }

    .signup-form label,
    .form-group label {
        font-size: 13px;
        margin-bottom: 6px;
    }

    .btn-check {
        padding: 12px 16px;
        font-size: 13px;
    }

    .btn-signup,
    .btn-submit {
        padding: 13px;
        font-size: 15px;
    }

    .divider {
        margin: 25px 0;
    }

    .btn-login-link {
        padding: 12px;
        font-size: 14px;
    }

    .msg,
    .validation-msg {
        font-size: 11px;
    }
}