/* =====================================
   언어 선택기 스타일
   ===================================== */
.language-selector {
    position: relative;
    margin-right: var(--space-4);
}

.language-select {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--space-2) var(--space-4);
    color: var(--gray-700);
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
    min-width: 120px;
}

.language-select:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}

.language-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.language-select option {
    background: var(--white);
    color: var(--gray-700);
    padding: var(--space-2);
}

/* 네비게이션 바가 스크롤되었을 때 */
.navbar.scrolled .language-select {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(203, 213, 225, 0.3);
    color: var(--gray-700);
}

.navbar.scrolled .language-select:hover {
    background: var(--white);
    border-color: var(--primary-color);
}

/* 사용자 정보 및 인증 버튼 스타일 */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.user-name {
    color: var(--gray-700);
    font-weight: 500;
    font-size: var(--text-sm);
}

.btn-logout {
    padding: var(--space-2) var(--space-4);
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--radius);
    font-size: var(--text-sm);
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-base);
}

.btn-logout:hover {
    background: #dc2626;
    color: white;
    transform: translateY(-1px);
}

.auth-buttons {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.btn-login {
    padding: var(--space-2) var(--space-4);
    color: var(--gray-700);
    font-weight: 500;
    text-decoration: none;
    transition: color var(--transition-base);
    font-size: var(--text-sm);
}

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

.btn-register {
    padding: var(--space-2) var(--space-4);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: var(--radius);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-base);
    font-size: var(--text-sm);
    box-shadow: var(--shadow-sm);
}

.btn-register:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
}

/* 다크 모드에서의 언어 선택기 */
@media (prefers-color-scheme: dark) {
    .language-select {
        background: rgba(30, 41, 59, 0.8);
        border-color: rgba(71, 85, 105, 0.3);
        color: rgba(248, 250, 252, 0.9);
    }
    
    .language-select:hover {
        background: rgba(30, 41, 59, 0.9);
        border-color: rgba(71, 85, 105, 0.5);
    }
    
    .language-select option {
        background: var(--gray-800);
        color: var(--gray-100);
    }
    
    .user-name {
        color: rgba(248, 250, 252, 0.9);
    }
    
    .btn-login {
        color: rgba(248, 250, 252, 0.8);
    }
    
    .btn-login:hover {
        color: var(--primary-light);
    }
}

/* 모바일 반응형 */
@media (max-width: 768px) {
    .nav-actions {
        flex-direction: column;
        gap: var(--space-2);
        align-items: stretch;
    }
    
    .language-selector {
        margin-right: 0;
        margin-bottom: var(--space-2);
    }
    
    .language-select {
        width: 100%;
        min-width: auto;
    }
    
    .auth-buttons {
        flex-direction: column;
        gap: var(--space-2);
    }
    
    .btn-login,
    .btn-register {
        text-align: center;
        padding: var(--space-3) var(--space-4);
    }
    
    .user-info {
        flex-direction: column;
        gap: var(--space-2);
        align-items: center;
    }
}

/* 접근성 개선 */
@media (prefers-reduced-motion: reduce) {
    .language-select,
    .btn-logout,
    .btn-register {
        transition: none;
    }
}

/* 포커스 가시성 개선 */
.language-select:focus-visible,
.btn-logout:focus-visible,
.btn-login:focus-visible,
.btn-register:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 마켓플레이스 프로모션 임포트 */
@import url('marketplace-promo.css');

/* 모바일 반응형 전용 CSS 임포트 */
@import url('mobile-responsive.css');

/* 4D 기술력 어필 스타일 */
.title-4d {
    display: block;
    font-size: 0.6em;
    background: linear-gradient(45deg, #6c5ce7, #fd79a8, #00cec9, #fdcb6e);
    background-size: 400% 400%;
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 3s ease-in-out infinite;
    margin-top: 10px;
    font-weight: 700;
    position: relative;
}

.title-4d::before {
    content: '🔮';
    position: absolute;
    left: -30px;
    top: 50%;
    transform: translateY(-50%);
    animation: rotate 4s linear infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes rotate {
    from { transform: translateY(-50%) rotate(0deg); }
    to { transform: translateY(-50%) rotate(360deg); }
}

/* 4D 준비 통계 스타일 */
.stat-item:nth-child(2) .stat-value {
    background: linear-gradient(135deg, #6c5ce7, #fd79a8);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 900;
    position: relative;
}

.stat-item:nth-child(2) .stat-value::after {
    content: '';
    position: absolute;
    top: -5px;
    right: -5px;
    width: 10px;
    height: 10px;
    background: #00cec9;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

/* 미래 기술 버튼 효과 (시뮬레이터용) */
.future-tech-hint {
    position: relative;
    overflow: hidden;
}

.future-tech-hint::after {
    content: '🌌 4D';
    position: absolute;
    top: -2px;
    right: -2px;
    background: linear-gradient(135deg, #6c5ce7, #fd79a8);
    color: white;
    padding: 2px 6px;
    border-radius: 8px;
    font-size: 0.7rem;
    font-weight: 700;
    animation: pulse 2s ease-in-out infinite;
}

/* 모바일 반응형 */
@media (max-width: 768px) {
    .title-4d {
        font-size: 0.5em;
        margin-top: 5px;
    }
    
    .title-4d::before {
        left: -20px;
        font-size: 0.8em;
    }
}