/**
 * 学習フロー - 改善版デザイン
 * 臨地実習における情報モラル学習システム
 */

/* ===========================
   学習フロー - 改善版デザイン
   =========================== */

.learning-flow-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.learning-step {
    position: relative;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 20px rgba(44, 111, 187, 0.08);
    border: 1px solid rgba(44, 111, 187, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    /* 文字の滲み防止 */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transform: translateZ(0);
    backface-visibility: hidden;
}

.learning-step::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--medical-blue) 0%, var(--medical-accent) 100%);
    border-radius: 16px 16px 0 0;
}

.learning-step:hover {
    transform: translateY(-6px) translateZ(0);
    box-shadow: 0 12px 35px rgba(44, 111, 187, 0.15);
    border-color: var(--medical-blue);
}

.step-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 2;
}

.step-icon-wrapper {
    position: relative;
    margin-bottom: 1rem;
}

.step-number {
    position: absolute;
    top: -8px;
    right: -8px;
    background: linear-gradient(135deg, var(--medical-blue) 0%, var(--medical-accent) 100%);
    color: white;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(44, 111, 187, 0.3);
    z-index: 3;
}

.step-icon {
    font-size: 3rem;
    line-height: 1;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
    transition: transform 0.2s ease;
    /* 文字の滲み防止 */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transform: translateZ(0);
}

.learning-step:hover .step-icon {
    transform: translateZ(0) scale(1.05);
}

.step-info {
    width: 100%;
}

.step-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.step-description {
    font-size: 0.95rem;
    color: var(--gray-600);
    line-height: 1.5;
    margin-bottom: 1rem;
    min-height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.step-details {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.detail-info {
    display: inline-flex;
    align-items: center;
    background: rgba(44, 111, 187, 0.05);
    color: var(--gray-600);
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid rgba(44, 111, 187, 0.1);
    transition: all 0.2s ease;
    cursor: default;
    /* 文字の滲み防止 */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transform: translateZ(0);
}

.learning-step:hover .detail-info {
    background: rgba(44, 111, 187, 0.1);
    color: var(--medical-blue);
    border-color: rgba(44, 111, 187, 0.2);
    transform: translateZ(0);
}

.step-arrow {
    display: none;
}

.total-time-display {
    background: linear-gradient(135deg, #1e3a5f 0%, #2c6fbb 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 16px;
    text-align: center;
    margin-top: 2rem;
    box-shadow: 0 8px 25px rgba(30, 58, 95, 0.2);
}

.time-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.time-label {
    font-size: 1rem;
    font-weight: 600;
    opacity: 0.9;
}

.time-value {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.025em;
}

.time-breakdown {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* デスクトップでのフロー表示 */
@media (min-width: 1024px) {
    .learning-flow-container {
        grid-template-columns: repeat(4, 1fr);
        gap: 1rem;
        position: relative;
    }
    
    .learning-step {
        margin-bottom: 2rem;
    }
    
    .step-arrow {
        display: block;
        position: absolute;
        top: 50%;
        right: -2rem;
        transform: translateY(-50%);
        font-size: 2rem;
        color: var(--medical-blue);
        font-weight: bold;
        z-index: 1;
        animation: pulse 2s infinite;
    }
    
    .learning-step:last-child .step-arrow {
        display: none;
    }
}

/* タブレット対応 */
@media (min-width: 768px) and (max-width: 1023px) {
    .learning-flow-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .learning-step:nth-child(2n) .step-arrow,
    .learning-step:nth-child(4) .step-arrow {
        display: none;
    }
    
    .learning-step:nth-child(odd) .step-arrow {
        display: block;
        position: absolute;
        top: 50%;
        right: -1.5rem;
        transform: translateY(-50%);
        font-size: 1.5rem;
        color: var(--medical-blue);
        font-weight: bold;
        z-index: 1;
    }
}

/* モバイル対応 */
@media (max-width: 767px) {
    .learning-flow-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .learning-step {
        padding: 1.25rem;
    }
    
    .step-icon {
        font-size: 2.5rem;
    }
    
    .step-title {
        font-size: 1.125rem;
    }
    
    .step-description {
        font-size: 0.875rem;
        min-height: 2.5rem;
    }
    
    .total-time-display {
        padding: 1.25rem;
    }
    
    .time-info {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .time-value {
        font-size: 1.5rem;
    }
}

/* アニメーション */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: translateY(-50%) scale(1);
    }
    50% {
        opacity: 0.7;
        transform: translateY(-50%) scale(1.1);
    }
}

/* アクセシビリティ */
@media (prefers-reduced-motion: reduce) {
    .learning-step {
        transition: none;
    }
    
    .learning-step:hover {
        transform: translateZ(0);
    }
    
    .step-arrow {
        animation: none;
    }
    
    .step-icon {
        transition: none;
    }
    
    .learning-step:hover .step-icon {
        transform: translateZ(0);
    }
    
    .detail-info {
        transition: none;
    }
    
    .learning-step:hover .detail-info {
        transform: translateZ(0);
    }
}

/* 高コントラストモード対応 */
@media (prefers-contrast: high) {
    .learning-step {
        border: 2px solid var(--gray-800);
    }
    
    .step-number {
        background: var(--gray-800);
    }
    
    .total-time-display {
        background: var(--gray-800);
    }
}