/**
 * Loading Indicator Styles
 *
 * 통일된 로딩 인디케이터 스타일
 */

/* ============================================
   전역 로딩 (전체 화면)
   ============================================ */

.global-loading {
    position: fixed;
    inset: 0;
    z-index: 999999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.global-loading.show {
    opacity: 1;
}

/* 배경 (블러 효과) */
.loading-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

/* 로딩 콘텐츠 */
.loading-content {
    position: relative;
    background: white;
    padding: 32px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    max-width: 200px;
}

.loading-message {
    margin-top: 16px;
    font-size: 14px;
    font-weight: 500;
    color: #374151;
}

/* ============================================
   스피너 애니메이션
   ============================================ */

.loading-spinner {
    position: relative;
    width: 60px;
    height: 60px;
    margin: 0 auto;
}

.loading-spinner.small {
    width: 40px;
    height: 40px;
}

.spinner-ring {
    position: absolute;
    inset: 0;
    border: 3px solid transparent;
    border-top-color: #ff6b9d;
    border-radius: 50%;
    animation: spin 1.5s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

.spinner-ring:nth-child(1) {
    animation-delay: -0.45s;
    border-top-color: #ff6b9d;
}

.spinner-ring:nth-child(2) {
    animation-delay: -0.3s;
    border-top-color: #ec4899;
}

.spinner-ring:nth-child(3) {
    animation-delay: -0.15s;
    border-top-color: #db2777;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* ============================================
   버튼 로딩 상태
   ============================================ */

.btn-loading {
    position: relative;
    cursor: not-allowed !important;
    opacity: 0.7;
}

.btn-loading:hover {
    opacity: 0.7 !important;
}

/* ============================================
   영역 로딩 오버레이
   ============================================ */

.loading-spinner-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    border-radius: inherit;
}

/* ============================================
   모바일 최적화
   ============================================ */

@media (max-width: 480px) {
    .loading-content {
        padding: 24px;
        max-width: 160px;
    }

    .loading-spinner {
        width: 50px;
        height: 50px;
    }

    .loading-message {
        font-size: 13px;
        margin-top: 12px;
    }
}

/* ============================================
   다크 모드 지원 (추후 구현 시)
   ============================================ */

[data-theme="dark"] .loading-content {
    background: #1f2937;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .loading-message {
    color: #f3f4f6;
}

[data-theme="dark"] .loading-spinner-overlay {
    background: rgba(31, 41, 55, 0.9);
}

/* ============================================
   접근성
   ============================================ */

/* 스크린 리더용 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}