:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #10b981;
    --bg-color: #f8fafc;
    --sidebar-bg: #1e293b;
    --sidebar-text: #f1f5f9;
    --text-main: #334155;
    --text-muted: #64748b;
    --card-bg: rgba(255, 255, 255, 0.9);
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --radius: 12px;
}

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

body {
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    padding: 20px 0;
    transition: all 0.3s ease;
}

.sidebar-header {
    padding: 20px 24px;
    margin-bottom: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
}

.logo i {
    color: var(--primary-color);
}

.nav-links {
    list-style: none;
    flex-grow: 1;
}

.nav-links li {
    padding: 12px 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.2s;
    opacity: 0.7;
}

.nav-links li:hover {
    opacity: 1;
    background-color: rgba(255, 255, 255, 0.05);
}

.nav-links li.active {
    opacity: 1;
    background-color: var(--primary-color);
    border-radius: 0 25px 25px 0;
    margin-right: 15px;
}

.sidebar-footer {
    padding: 20px 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
}

.dot {
    width: 10px;
    height: 10px;
    background-color: #94a3b8;
    border-radius: 50%;
}

.dot.online {
    background-color: var(--secondary-color);
}

/* Main Content */
.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 24px;
}

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

.premium-select {
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    outline: none;
    background: white;
    cursor: pointer;
    font-size: 0.95rem;
}

/* Bulk Toolbar */
.bulk-toolbar {
    background: #1e293b;
    color: #fff;
    padding: 12px 24px;
    border-radius: 12px;
    margin-bottom: 16px;
    display: none;
    /* Changed: will be toggled by JS .visible class */
    justify-content: space-between;
    align-items: center;
    animation: slideDown 0.3s ease;
}

.bulk-toolbar.visible {
    display: flex !important;
    animation: slideInBottom 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

@keyframes slideInBottom {
    from {
        transform: translateY(20px);
        opacity: 0;
    }

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

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

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

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

.mini-input {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.85rem;
    width: 120px;
}

.btn-sm {
    padding: 4px 12px;
    font-size: 0.8rem;
}

/* Table Columns */
.col-check {
    width: 40px;
    text-align: center;
}

tr.selected-row td {
    background-color: rgba(99, 102, 241, 0.1) !important;
}

.icon-button {
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.2s;
}

.icon-button:hover {
    color: var(--primary-color);
}

/* Tabs */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
    flex-direction: column;
    height: 100%;
    overflow-y: auto;
}

.tab-content.active {
    display: flex;
}

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

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

/* Cards & Components */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.section-header {
    margin-bottom: 24px;
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.filter-group {
    display: flex;
    gap: 8px;
    background: #f1f5f9;
    padding: 4px;
    border-radius: 10px;
}

.filter-btn {
    padding: 6px 16px;
    border-radius: 8px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.2s;
    color: var(--text-muted);
}

.filter-btn:hover {
    color: var(--text-main);
}

.filter-btn.active {
    background: #fff;
    color: var(--primary-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.filter-btn i {
    margin-right: 6px;
}

/* Table Highlighting */
td.missing-cell {
    background-color: rgba(254, 243, 199, 0.5);
    border: 1px inset #f59e0b;
}

td.formula-cell {
    background-color: #f1f5f9;
    color: var(--primary-color);
    font-style: italic;
    font-family: monospace;
    font-size: 0.8rem;
    position: relative;
    padding-left: 28px !important;
}

td.formula-cell::before {
    content: 'f';
    position: absolute;
    left: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-color);
    color: white;
    width: 14px;
    height: 14px;
    border-radius: 3px;
    font-size: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Inter', sans-serif;
    font-weight: bold;
    font-style: normal;
    pointer-events: none;
}

tr.duplicate-row {
    background-color: rgba(254, 226, 226, 0.5);
}

/* Global Status Bar */
.status-bar {
    background: #f1f5f9;
    padding: 8px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.status-bar i {
    color: var(--primary-color);
}

.status-bar .text-link {
    background: none;
    border: none;
    color: var(--primary-color);
    text-decoration: underline;
    cursor: pointer;
    font-size: inherit;
    margin-left: auto;
}

/* Pagination */
.table-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.pagination {
    display: flex;
    gap: 4px;
}

.page-btn {
    padding: 6px 12px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: #fff;
    cursor: pointer;
    transition: all 0.2s;
}

.page-btn:hover {
    background: #f1f5f9;
}

.page-btn.active {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Search Box */
.search-box {
    position: relative;
    flex-grow: 1;
    max-width: 300px;
}

.search-box i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    padding: 10px 10px 10px 40px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background-color: #fff;
    outline: none;
}

.search-box input:focus {
    border-color: var(--primary-color);
}

/* Table */
.table-container {
    flex-grow: 1;
    overflow: auto;
    position: relative;
    min-height: 400px;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th {
    background: #f8fafc;
    position: sticky;
    top: 0;
    padding: 12px 16px;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 2px solid var(--border-color);
    z-index: 10;
}

td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
}

tr:hover td {
    background-color: #f1f5f9;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

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

.btn-danger {
    background-color: #ef4444;
    color: #fff;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

/* Premium Sheet List Styles */
.sheet-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

.card-mini {
    background: #fff !important;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s;
}

.card-mini:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border-color: var(--primary-color);
}

.sheet-main-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sheet-display-name {
    font-weight: 600;
    color: var(--text-main);
    font-size: 0.95rem;
}

.sheet-id-badge {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: monospace;
    background: #f1f5f9;
    padding: 2px 6px;
    border-radius: 4px;
    width: fit-content;
}

.delete-btn-minimal {
    background: none;
    border: none;
    color: #94a3b8;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.2s;
}

.delete-btn-minimal:hover {
    background: #fee2e2;
    color: #ef4444;
}

.add-sheet-form {
    display: flex;
    gap: 10px;
}

.add-sheet-form input {
    flex: 1;
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
}

/* Logs */
.log-area {
    background: #1e293b;
    color: #34d399;
    font-family: monospace;
    padding: 16px;
    border-radius: 8px;
    height: 200px;
    overflow-y: auto;
    font-size: 0.85rem;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: #1e293b;
    color: #fff;
    padding: 12px 24px;
    border-radius: 8px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.hidden {
    transform: translateY(100px);
    opacity: 0;
}

.hidden {
    display: none !important;
}

.mt-20 {
    margin-top: 20px;
}