:root {
    --primary-color: #f6a700;
    --primary-dark: #d99400;
    --bg-dark: #000;
    --text-light: #fff;
    --text-muted: #bdbdbd;
    --input-bg: #1a1a1a;
    --border-color: rgba(255, 255, 255, 0.1);
    --error-color: #ff4444;
    --success-color: #00c851;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    font-family: 'Malgun Gothic', Inter, system-ui, -apple-system, sans-serif;
    background: var(--bg-dark);
    color: var(--text-light);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.register-container {
    width: 100%;
    max-width: 480px;
}

.register-box {
    background: rgba(20, 20, 20, 0.8);
    border-radius: 20px;
    padding: 48px 28px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* Logo Section */
.logo-section {
    text-align: center;
    margin-bottom: 48px;
}

.logo {
    height: 80px;
    margin-bottom: 28px;
}

.logo-section h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-light);
    letter-spacing: -0.5px;
}

/* Form */
.register-form {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

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

.form-group label {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-light);
    letter-spacing: -0.3px;
}

.required {
    color: var(--primary-color);
    margin-left: 4px;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="password"],
select {
    width: 100%;
    padding: 18px 20px;
    background: var(--input-bg);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-light);
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s;
}

input::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
    font-size: 15px;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(26, 26, 26, 0.95);
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='16' height='12' viewBox='0 0 16 12' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M2 2L8 9L14 2' stroke='%23bdbdbd' stroke-width='2.5' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 18px center;
    padding-right: 50px;
}

select option {
    background: #1a1a1a;
    color: var(--text-light);
    padding: 12px;
    font-size: 16px;
}

/* Input with Button */
.input-with-button {
    display: flex;
    gap: 12px;
}

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

.btn-check {
    padding: 18px 24px;
    background: transparent;
    border: 2px solid var(--primary-color);
    border-radius: 10px;
    color: var(--primary-color);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.3s;
    letter-spacing: -0.3px;
}

.btn-check:hover {
    background: var(--primary-color);
    color: var(--bg-dark);
}

.btn-check:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Validation Messages */
.validation-message {
    font-size: 14px;
    margin-top: 4px;
    letter-spacing: -0.3px;
}

.validation-message.error {
    color: var(--error-color);
}

.validation-message.success {
    color: var(--success-color);
}

.hint-text {
    font-size: 14px;
    color: var(--text-muted);
    letter-spacing: -0.3px;
}

/* Radio Buttons */
.account-type-group {
    display: flex;
    flex-direction: row;
    gap: 12px;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-size: 16px;
    padding: 12px;
    border-radius: 8px;
    transition: background 0.2s;
    flex: 1;
}

.radio-label:hover {
    background: rgba(255, 255, 255, 0.05);
}

.radio-label input[type="radio"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

.radio-label span {
    color: var(--text-light);
    letter-spacing: -0.3px;
}

/* Submit Button */
.btn-submit {
    width: 100%;
    padding: 22px 24px;
    background: var(--primary-color);
    border: none;
    border-radius: 12px;
    color: var(--bg-dark);
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 16px;
    letter-spacing: -0.5px;
}

.btn-submit:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-submit:active {
    transform: translateY(0);
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Login Link */
.login-link {
    text-align: center;
    margin-top: 28px;
    color: var(--text-muted);
    font-size: 16px;
}

.login-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
    letter-spacing: -0.3px;
}

.login-link a:hover {
    color: #e89c00;
    text-decoration: underline;
}

/* Desktop Responsive */
@media (min-width: 768px) {
    body {
        padding: 32px;
    }

    .register-box {
        padding: 60px 48px;
        max-width: 600px;
    }

    .logo {
        height: 90px;
        margin-bottom: 32px;
    }

    .logo-section h1 {
        font-size: 36px;
    }

    .register-form {
        gap: 32px;
    }

    .form-group {
        gap: 14px;
    }

    .form-group label {
        font-size: 17px;
    }

    input[type="text"],
    input[type="email"],
    input[type="tel"],
    input[type="password"],
    select {
        padding: 20px 22px;
        font-size: 16px;
    }

    .account-type-group {
        gap: 16px;
    }

    .radio-label {
        padding: 14px 16px;
        font-size: 15px;
    }

    .btn-submit {
        padding: 24px 28px;
        font-size: 19px;
        margin-top: 20px;
    }

    .login-link {
        margin-top: 32px;
    }

    .login-link a {
        font-size: 16px;
    }
}