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

.login-card {
    background: var(--bg-primary);
    border-radius: 12px;
    box-shadow: 0 4px 20px var(--shadow-color);
    padding: 50px 40px;
    width: 100%;
    max-width: 420px;
}

.login-title {
    text-align: center;
    margin-bottom: 35px;
}

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

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

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

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

.login-form input[type="text"],
.login-form input[type="password"] {
    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;
}

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

.login-form input::placeholder {
    color: var(--text-muted);
}

.btn-login {
    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-login:hover {
    background: var(--btn-primary-hover);
}

.login-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 20px 0;
    font-size: 14px;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    cursor: pointer;
}

.remember-me input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.forgot-password {
    color: var(--link-color);
    text-decoration: none;
}

.forgot-password:hover {
    text-decoration: underline;
}

.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;
}

/* 소셜 로그인 버튼 */
.social-login {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 25px;
}

.btn-social {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 14px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

.btn-social img {
    width: 20px;
    height: 20px;
}

.btn-kakao {
    background: #FEE500;
    color: #000000;
}

.btn-kakao:hover {
    background: #F5DC00;
}

.btn-naver {
    background: #03C75A;
    color: var(--text-white);
}

.btn-naver:hover {
    background: #02B150;
}

.btn-google {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-google:hover {
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

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

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

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

.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;
}

.warning-message {
    background: #fff3cd;
    border: 1px solid #ffc107;
    color: #856404;
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    text-align: center;
}

.confirm-message {
    background: #cce5ff;
    border: 1px solid #b8daff;
    color: #004085;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    text-align: center;
}

.confirm-message p {
    margin: 5px 0;
}

.btn-confirm {
    background: #e74c3c !important;
}

.btn-confirm:hover {
    background: #c0392b !important;
}

.btn-cancel {
    display: block;
    width: 100%;
    padding: 15px;
    background: var(--bg-secondary, #f5f5f5);
    color: var(--text-primary, #333);
    border: 1px solid var(--border-color, #ddd);
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    margin-top: 10px;
    transition: background 0.3s;
}

.btn-cancel:hover {
    background: var(--border-color, #ddd);
}

/* 다크 모드 */
body.dark-mode .login-card {
    background: #2c3e50;
}
body.dark-mode .login-title h2 {
    color: #ecf0f1;
}
body.dark-mode .login-title p {
    color: #95a5a6;
}
body.dark-mode .login-form label {
    color: #ecf0f1;
}
body.dark-mode .login-form input {
    background: #34495e;
    border-color: #34495e;
    color: #ecf0f1;
}
body.dark-mode .remember-me {
    color: #95a5a6;
}
body.dark-mode .divider::before,
body.dark-mode .divider::after {
    background: #34495e;
}
body.dark-mode .signup-link p {
    color: #95a5a6;
}
body.dark-mode .btn-signup {
    background: #34495e;
    border-color: #95a5a6;
    color: #ecf0f1;
}
body.dark-mode .btn-signup:hover {
    background: #95a5a6;
    color: #2c3e50;
}
body.dark-mode .warning-message {
    background: #3d3d00;
    border-color: #5c5c00;
    color: #ffc107;
}
body.dark-mode .confirm-message {
    background: #1a3a5c;
    border-color: #2a5a8c;
    color: #8bb8e8;
}
body.dark-mode .btn-cancel {
    background: #34495e;
    border-color: #4a6278;
    color: #ecf0f1;
}
body.dark-mode .btn-cancel:hover {
    background: #4a6278;
}

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

    .login-options {
        flex-direction: column;
        gap: 15px;
    }
}

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

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

    .login-title h2 {
        font-size: 24px;
    }

    .login-title p {
        font-size: 13px;
    }

    .login-form input[type="text"],
    .login-form input[type="password"] {
        padding: 12px 14px;
        font-size: 14px;
    }

    .login-form label {
        font-size: 13px;
    }

    .btn-login {
        padding: 13px;
        font-size: 15px;
    }

    .login-options {
        font-size: 13px;
    }

    .divider {
        margin: 25px 0;
    }

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