:root {
    --primary-color: #0052CC;
    --secondary-color: #344563;
    --success-color: #36B37E;
    --danger-color: #DE350B;
    --warning-color: #FFAB00;
    --background-color: #FAFBFC;
    --surface-color: #FFFFFF;
    --text-primary: #172B4D;
    --text-secondary: #6B778C;
    --border-color: #DFE1E6;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans JP', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
    box-shadow: var(--shadow-sm);
}

header h1 {
    font-size: 32px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 18px;
}

.language-selector {
    margin-top: 16px;
    display: flex;
    gap: 8px;
}

.lang-btn {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    background: var(--surface-color);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.lang-btn:hover {
    background-color: var(--background-color);
    color: var(--text-primary);
}

.lang-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

main {
    flex: 1;
    padding: 40px 0;
}

.upload-area {
    background: var(--surface-color);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 60px 40px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    margin-bottom: 32px;
}

.upload-area:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.upload-area.drag-over {
    background-color: #F4F5F7;
    border-color: var(--primary-color);
    transform: scale(1.02);
}

.upload-icon {
    width: 64px;
    height: 64px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.upload-content h2 {
    font-size: 24px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.upload-content p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.btn-primary, .btn-secondary, .btn-danger {
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-block;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #0747A6;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #B71C1C;
}

.file-list {
    display: grid;
    gap: 16px;
    margin-bottom: 32px;
}

.file-item {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    display: grid;
    grid-template-columns: 120px 1fr auto;
    gap: 20px;
    align-items: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

.file-item:hover {
    box-shadow: var(--shadow-md);
}

.file-preview {
    width: 120px;
    height: 90px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--background-color);
}

.file-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.file-info {
    flex: 1;
}

.file-name {
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.file-meta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--text-secondary);
}

.meta-icon {
    width: 16px;
    height: 16px;
}

.location-info {
    background-color: var(--warning-color);
    color: white;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
}

.file-actions {
    display: flex;
    gap: 8px;
}

.btn-icon {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    background: var(--surface-color);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-icon:hover {
    background-color: var(--background-color);
}

.btn-icon svg {
    width: 16px;
    height: 16px;
}

.action-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 32px;
}

footer {
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: 32px 0;
    margin-top: auto;
}

.footer-content {
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

.footer-content p:first-child {
    margin-bottom: 8px;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    header h1 {
        font-size: 24px;
    }
    
    .subtitle {
        font-size: 16px;
    }
    
    .upload-area {
        padding: 40px 20px;
    }
    
    .file-item {
        grid-template-columns: 80px 1fr;
        gap: 12px;
    }
    
    .file-preview {
        width: 80px;
        height: 60px;
    }
    
    .file-actions {
        grid-column: 1 / -1;
        justify-content: flex-end;
    }
    
    .language-selector {
        flex-wrap: wrap;
    }
}

/* ローディングアニメーション */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* トースト通知 */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--surface-color);
    padding: 16px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateX(0);
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--danger-color);
}

.toast-icon {
    width: 20px;
    height: 20px;
}

/* モーダル */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--surface-color);
    padding: 32px;
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal.show .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.modal-title {
    font-size: 24px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.modal-close:hover {
    background-color: var(--background-color);
}

.exif-data {
    display: grid;
    gap: 16px;
}

.exif-group {
    background: var(--background-color);
    padding: 16px;
    border-radius: var(--radius-md);
}

.exif-group h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.exif-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}

.exif-item:last-child {
    border-bottom: none;
}

.exif-label {
    color: var(--text-secondary);
}

.exif-value {
    color: var(--text-primary);
    font-weight: 500;
}