/* 추가 사용자 정의 스타일 */

/* 로딩 애니메이션 개선 */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* 테이블 반응형 개선 */
@media (max-width: 768px) {
    .table-responsive {
        display: block;
        width: 100%;
        overflow-x: auto;
        white-space: nowrap;
    }
    
    .table-responsive table {
        min-width: 600px;
    }
}

/* 카드 호버 효과 */
.card-hover {
    transition: all 0.3s ease;
}

.card-hover:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* 그라데이션 배경 개선 */
.gradient-bg {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* 입력 필드 포커스 개선 */
.input-focus {
    transition: all 0.2s ease;
}

.input-focus:focus {
    transform: scale(1.02);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* 버튼 애니메이션 */
.btn-animation {
    transition: all 0.2s ease;
}

.btn-animation:hover {
    transform: translateY(-1px);
}

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

/* 모바일 네비게이션 개선 */
@media (max-width: 640px) {
    .nav-tabs {
        overflow-x: auto;
        white-space: nowrap;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }
    
    .nav-tabs::-webkit-scrollbar {
        display: none;
    }
    
    .nav-tabs button {
        min-width: 120px;
    }
}

/* 성적 색상 코딩 */
.grade-excellent {
    color: #10B981;
    background-color: #ECFDF5;
}

.grade-good {
    color: #3B82F6;
    background-color: #EFF6FF;
}

.grade-fair {
    color: #F59E0B;
    background-color: #FFFBEB;
}

.grade-poor {
    color: #EF4444;
    background-color: #FEF2F2;
}

/* 통계 카드 애니메이션 */
.stat-card {
    background: linear-gradient(135deg, var(--tw-gradient-from) 0%, var(--tw-gradient-to) 100%);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: scale(1.05);
}

/* 테이블 행 호버 효과 */
.table-row-hover {
    transition: background-color 0.2s ease;
}

.table-row-hover:hover {
    background-color: #F9FAFB;
}

/* 모달 애니메이션 */
.modal-enter {
    animation: modalEnter 0.3s ease-out;
}

@keyframes modalEnter {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* 차트 컨테이너 개선 */
.chart-container {
    position: relative;
    width: 100%;
    height: 400px;
}

@media (max-width: 640px) {
    .chart-container {
        height: 300px;
    }
}

/* 성적 배지 스타일 */
.score-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* 피드백 툴팁 */
.feedback-tooltip {
    position: relative;
    cursor: help;
}

.feedback-tooltip:hover::after {
    content: attr(data-feedback);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: #374151;
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.875rem;
    white-space: nowrap;
    z-index: 100;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* 스크롤바 커스터마이징 */
.custom-scrollbar {
    scrollbar-width: thin;
    scrollbar-color: #CBD5E0 #F7FAFC;
}

.custom-scrollbar::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

.custom-scrollbar::-webkit-scrollbar-track {
    background: #F7FAFC;
    border-radius: 3px;
}

.custom-scrollbar::-webkit-scrollbar-thumb {
    background: #CBD5E0;
    border-radius: 3px;
}

.custom-scrollbar::-webkit-scrollbar-thumb:hover {
    background: #A0AEC0;
}

/* 로그인 폼 개선 */
.login-form {
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

/* 성공/에러 메시지 스타일 */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
}

.alert-success {
    background-color: #ECFDF5;
    border: 1px solid #10B981;
    color: #065F46;
}

.alert-error {
    background-color: #FEF2F2;
    border: 1px solid #EF4444;
    color: #991B1B;
}

.alert-warning {
    background-color: #FFFBEB;
    border: 1px solid #F59E0B;
    color: #92400E;
}

/* 빈 상태 일러스트레이션 */
.empty-state {
    text-align: center;
    padding: 48px 24px;
}

.empty-state i {
    font-size: 4rem;
    color: #D1D5DB;
    margin-bottom: 16px;
}

.empty-state h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #6B7280;
    margin-bottom: 8px;
}

.empty-state p {
    color: #9CA3AF;
}

/* 진행률 바 */
.progress-bar {
    width: 100%;
    height: 8px;
    background-color: #E5E7EB;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #10B981 0%, #059669 100%);
    transition: width 0.3s ease;
}

/* 태블릿 및 모바일 최적화 */
@media (max-width: 1024px) {
    .container {
        padding-left: 16px;
        padding-right: 16px;
    }
}

@media (max-width: 640px) {
    .text-responsive {
        font-size: 0.875rem;
    }
    
    .btn-responsive {
        padding: 8px 12px;
        font-size: 0.875rem;
    }
    
    .card-responsive {
        margin: 8px 0;
        padding: 16px;
    }
}