/* ===== CSS Variables ===== */
:root {
    --primary: #f59e0b;
    --primary-dark: #d97706;
    --primary-light: #fbbf24;
    --secondary: #1e3a5f;
    --secondary-light: #2d4a6f;
    --success: #10b981;
    --success-light: #34d399;
    --danger: #ef4444;
    --danger-light: #f87171;
    --warning: #f59e0b;
    --info: #3b82f6;

    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --bg-input: #0f172a;

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border-color: #334155;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;

    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);

    --transition: all 0.3s ease;
    --sidebar-width: 300px;
}

/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== App Container ===== */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--secondary) 0%, var(--bg-card) 100%);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 32px;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-5px);
    }
}

.logo h1 {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.add-site-container {
    padding: 16px 24px;
}

.btn-add-site {
    width: 100%;
    padding: 14px 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: none;
    border-radius: var(--border-radius);
    color: var(--bg-dark);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.btn-add-site:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.plus-icon {
    font-size: 18px;
    font-weight: 700;
}

.site-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px 12px;
}

.site-list::-webkit-scrollbar {
    width: 6px;
}

.site-list::-webkit-scrollbar-track {
    background: transparent;
}

.site-list::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.site-item {
    padding: 14px 16px;
    margin-bottom: 8px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid transparent;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.site-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-color);
}

.site-item.active {
    background: rgba(245, 158, 11, 0.15);
    border-color: var(--primary);
}

.site-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.site-item-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.site-item-name::before {
    content: '🏢';
    font-size: 16px;
}

.site-item-progress {
    font-size: 12px;
    color: var(--text-secondary);
    padding: 2px 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
}

.site-item-progress.complete {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

/* 現場IDバッジ */
.site-id-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--bg-dark);
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    margin-right: 8px;
    font-family: 'Consolas', 'Monaco', monospace;
}

.site-id-display {
    color: var(--primary);
    font-weight: 700;
    font-family: 'Consolas', 'Monaco', monospace;
}

.sidebar-footer {
    padding: 20px 24px;
    border-top: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2);
}

.stats {
    display: flex;
    justify-content: space-around;
}

.stat-item {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 32px;
    min-height: 100vh;
}

/* ===== Empty State ===== */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 60vh;
    text-align: center;
}

.empty-icon {
    font-size: 80px;
    margin-bottom: 24px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-15px);
    }
}

.empty-state h2 {
    font-size: 24px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.empty-state p {
    font-size: 16px;
    color: var(--text-secondary);
}

/* ===== Site View ===== */
.hidden {
    display: none !important;
}

.site-view {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.site-name {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.site-meta {
    display: flex;
    gap: 20px;
}

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

.site-date::before {
    content: '📅';
}

.site-progress::before {
    content: '📊';
}

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

.btn-icon {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-card);
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.btn-icon.btn-danger:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: var(--danger);
}

/* ===== Progress Bar ===== */
.progress-bar-container {
    height: 8px;
    background: var(--bg-card);
    border-radius: 4px;
    margin-bottom: 24px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--success) 100%);
    border-radius: 4px;
    transition: width 0.5s ease;
    width: 0%;
}

/* ===== Category Tabs ===== */
.category-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--bg-dark);
    font-weight: 500;
}

/* ===== Add Task Form ===== */
.add-task-container {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
}

.add-task-form {
    display: flex;
    gap: 12px;
    align-items: center;
}

.task-input {
    flex: 1;
    padding: 14px 18px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 14px;
    transition: var(--transition);
}

.task-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

.task-input::placeholder {
    color: var(--text-muted);
}

.category-select {
    padding: 14px 18px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    min-width: 140px;
}

.category-select:focus {
    outline: none;
    border-color: var(--primary);
}

.btn-add-task {
    padding: 14px 28px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: none;
    border-radius: var(--border-radius-sm);
    color: var(--bg-dark);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-add-task:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== Checklist ===== */
.checklist {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.checklist-item:hover {
    border-color: var(--primary);
    transform: translateX(5px);
}

.checklist-item.completed {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--success);
}

.checklist-item.completed .item-text {
    text-decoration: line-through;
    color: var(--text-muted);
}

.checkbox {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.checkbox:hover {
    border-color: var(--primary);
}

.checkbox.checked {
    background: var(--success);
    border-color: var(--success);
}

.checkbox.checked::after {
    content: '✓';
    color: white;
    font-size: 14px;
    font-weight: 700;
}

.item-content {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 12px;
}

.item-text {
    font-size: 15px;
    color: var(--text-primary);
}

.item-category {
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 12px;
    font-weight: 500;
}

.category-safety {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-light);
}

.category-equipment {
    background: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
}

.category-document {
    background: rgba(168, 85, 247, 0.2);
    color: #c084fc;
}

.category-other {
    background: rgba(107, 114, 128, 0.2);
    color: #9ca3af;
}

.item-actions {
    display: flex;
    gap: 8px;
    opacity: 0;
    transition: var(--transition);
}

.checklist-item:hover .item-actions {
    opacity: 1;
}

.btn-delete-item {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 6px;
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}

.modal {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    animation: scaleIn 0.3s ease;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-small {
    max-width: 400px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 20px;
    font-weight: 600;
}

.modal-close {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-group input[type="text"],
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input[type="text"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.form-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-right: 8px;
    accent-color: var(--primary);
}

.form-group label:has(input[type="checkbox"]) {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 20px 24px;
    border-top: 1px solid var(--border-color);
}

.btn-cancel {
    padding: 12px 24px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-cancel:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.btn-primary {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius-sm);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--bg-dark);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-danger {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius-sm);
    background: var(--danger);
    color: white;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-danger:hover {
    background: var(--danger-light);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }

    .app-container {
        flex-direction: column;
    }

    .main-content {
        margin-left: 0;
        padding: 16px;
    }

    .add-task-form {
        flex-direction: column;
    }

    .task-input,
    .category-select,
    .btn-add-task {
        width: 100%;
    }

    .site-header {
        flex-direction: column;
        gap: 16px;
    }

    .site-actions {
        width: 100%;
        justify-content: flex-end;
    }
}