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

:root {
    --sidebar-width: 220px;
    --sidebar-bg: #002D6B;
    --sidebar-active: #003F8F;
    --sidebar-hover: #003580;
    --accent: #004FA3;
    --accent-dark: #003A7A;
    --ems-yellow: #F5C200;
    --bg: #f4f6fb;
    --surface: #ffffff;
    --border: #e0e4ef;
    --text: #1a2540;
    --text-muted: #7a84a0;
    --added: #d4edda;
    --added-text: #155724;
    --removed: #f8d7da;
    --removed-text: #721c24;
    --changed: #fff3cd;
    --changed-text: #856404;
    --radius: 8px;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
}

body { font-family: 'Segoe UI', Arial, sans-serif; background: var(--bg); color: var(--text); font-size: 14px; }

/* Layout */
.app-layout { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: #c8cfe0;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.main-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow: hidden;
}

.sidebar-header {
    background: #fff;
    padding: 14px 16px 12px;
    border-bottom: 3px solid var(--ems-yellow);
    flex-shrink: 0;
}
.sidebar-logo-img {
    height: 32px;
    width: auto;
    display: block;
}

.nav-list { list-style: none; padding: 12px 0; flex: 1; }
.nav-item { }
.nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 18px;
    color: #b0b9d0;
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
    border-left: 3px solid transparent;
}
.nav-link:hover { background: var(--sidebar-hover); color: #fff; }
.nav-item.active .nav-link { background: var(--sidebar-active); color: #fff; border-left-color: var(--ems-yellow); }
.nav-icon { font-size: 16px; width: 20px; text-align: center; }
.nav-label { font-size: 14px; }

/* Topbar */
.topbar {
    height: 56px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 28px;
    justify-content: space-between;
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.topbar-page-title { font-size: 15px; font-weight: 600; color: var(--text); }

/* User menu */
.user-menu { position: relative; }
.user-menu-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 5px 12px 5px 5px;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
    font-size: 14px;
    color: var(--text);
}
.user-menu-btn:hover { background: var(--bg); border-color: var(--accent); }
.user-avatar {
    width: 28px; height: 28px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
}
.user-display-name { font-weight: 500; max-width: 140px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-menu-arrow { font-size: 9px; color: var(--text-muted); flex-shrink: 0; }
.user-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 180px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 4px 18px rgba(0,0,0,0.12);
    z-index: 200;
    overflow: hidden;
}
.user-dropdown.open { display: block; }
.dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    text-decoration: none;
    font-size: 14px;
    color: var(--text);
    transition: background 0.1s;
    white-space: nowrap;
}
.dropdown-item:hover { background: var(--bg); }
.dropdown-item-danger { color: #dc3545; }
.dropdown-item-danger:hover { background: #fff5f5; }
.dropdown-divider { height: 1px; background: var(--border); margin: 4px 0; }

.main-content { flex: 1; padding: 32px; overflow-y: auto; }

/* Page header */
.page-header { margin-bottom: 28px; }
.page-title { font-size: 22px; font-weight: 700; color: var(--text); }
.page-subtitle { color: var(--text-muted); margin-top: 4px; font-size: 13px; }

/* Cards */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 20px;
}
.card-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

/* Forms */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 13px; font-weight: 500; color: var(--text); margin-bottom: 5px; }
.form-control {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 5px;
    font-size: 14px;
    color: var(--text);
    background: #fff;
    transition: border-color 0.15s;
}
.form-control:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(79,142,247,0.12); }
.form-hint { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* File upload */
.upload-fields { display: flex; gap: 24px; }
.upload-field { flex: 1; min-width: 0; }
.upload-compact {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fafbff;
    transition: border-color 0.15s, background 0.15s;
}
.upload-compact:hover { border-color: var(--accent); background: #f0f5ff; }
.upload-pick-btn { white-space: nowrap; flex-shrink: 0; cursor: pointer; }
.upload-pick-btn input[type=file] { display: none; }
.upload-filename { font-size: 13px; color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; flex: 1; }

/* Grid */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 20px;
    border: none;
    border-radius: 5px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
    text-decoration: none;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-secondary { background: var(--border); color: var(--text); }
.btn-secondary:hover { background: #d4d9e8; }
.btn-success { background: #28a745; color: #fff; }
.btn-success:hover { background: #218838; }
.btn-danger { background: #dc3545; color: #fff; }
.btn-danger:hover { background: #c82333; }
.btn-sm { padding: 5px 12px; font-size: 13px; }

/* Alerts */
.alert { padding: 12px 16px; border-radius: 5px; margin-bottom: 16px; font-size: 14px; }
.alert-info { background: #e8f0fe; color: #1a56b8; border: 1px solid #b6d0f7; }
.alert-success { background: var(--added); color: var(--added-text); border: 1px solid #b2dfca; }
.alert-error { background: var(--removed); color: var(--removed-text); border: 1px solid #f1b0b7; }
.alert-warning { background: var(--changed); color: var(--changed-text); border: 1px solid #f0d060; }

/* Table */
.table-wrapper { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead th {
    background: #f0f3fa;
    color: var(--text);
    font-weight: 600;
    padding: 10px 12px;
    text-align: left;
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}
tbody tr { border-bottom: 1px solid var(--border); }
tbody tr:last-child { border-bottom: none; }
tbody td { padding: 8px 12px; vertical-align: top; }
tbody tr:hover { background: #f7f9ff; }
.row-number { color: var(--text-muted); font-size: 12px; min-width: 36px; }

/* Compare mode tabs */
.compare-mode-tabs {
    display: flex;
    border-bottom: 2px solid var(--border);
    margin-bottom: 20px;
}
.compare-mode-tab {
    padding: 10px 22px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: color 0.15s, border-color 0.15s;
}
.compare-mode-tab:hover { color: var(--text); }
.compare-mode-tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

/* Resizable diff result table */
.diff-result-table { table-layout: fixed; }
.diff-result-table thead th {
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    resize: horizontal;
    min-width: 60px;
}
.diff-result-table tbody td {
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    vertical-align: middle;
}
.diff-result-table .col-pos    { width: 42px;  min-width: 42px;  resize: none; }
.diff-result-table .col-name   { width: 22%; }
.diff-result-table .col-sample { width: 15%; }
.diff-result-table .col-status { width: 82px;  min-width: 70px;  resize: none; }

/* Diff table */
.diff-wrapper { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.diff-side { overflow-x: auto; }
.diff-header {
    padding: 10px 14px;
    font-weight: 600;
    font-size: 13px;
    background: #f0f3fa;
    border-bottom: 2px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
}
.diff-header.source { border-right: 1px solid var(--border); }
.diff-header .file-badge { font-size: 11px; background: var(--border); padding: 2px 8px; border-radius: 20px; font-weight: 400; color: var(--text-muted); }

.diff-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.diff-table td { padding: 5px 10px; vertical-align: top; border-bottom: 1px solid #f0f3fa; white-space: pre-wrap; word-break: break-word; }
.diff-table .diff-row-num { color: var(--text-muted); width: 36px; min-width: 36px; text-align: right; padding-right: 8px; user-select: none; background: #fafbff; border-right: 1px solid var(--border); }

.row-added    { background: var(--added); }
.row-removed  { background: var(--removed); }
.row-changed  { background: var(--changed); }
.row-equal    { }
.row-empty    { background: #f7f9ff; color: transparent; }

/* Cell-level highlighting within changed rows */
.cell-changed-src { background: #f5c6cb; font-weight: 600; border-radius: 3px; }
.cell-changed-new { background: #b8dfc8; font-weight: 600; border-radius: 3px; }

.diff-legend { display: flex; gap: 16px; font-size: 12px; flex-wrap: wrap; }
.legend-item { display: flex; align-items: center; gap: 6px; }
.legend-dot { width: 12px; height: 12px; border-radius: 3px; }

/* Stats bar */
.stats-bar { display: flex; gap: 16px; margin-bottom: 16px; flex-wrap: wrap; }
.stat-pill {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
}
.stat-added { background: var(--added); color: var(--added-text); }
.stat-removed { background: var(--removed); color: var(--removed-text); }
.stat-changed { background: var(--changed); color: var(--changed-text); }
.stat-equal { background: #f0f3fa; color: var(--text-muted); }

/* Config builder */
.config-row {
    display: grid;
    grid-template-columns: 1fr 160px 1fr 1fr 40px;
    gap: 8px;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
}
.config-row:last-child { border-bottom: none; }
.config-row-header { font-weight: 600; font-size: 12px; color: var(--text-muted); }
.config-arrow { text-align: center; color: var(--text-muted); font-size: 18px; }

.config-list-header {
    display: grid;
    grid-template-columns: 1fr 160px 1fr 1fr 40px;
    gap: 8px;
    padding: 6px 0 8px;
    border-bottom: 2px solid var(--border);
    margin-bottom: 4px;
}
.config-list-header span { font-size: 12px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.4px; }

/* Saved configs */
.config-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 18px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    background: #fff;
    transition: border-color 0.15s;
}
.config-card:hover { border-color: var(--accent); }
.config-card-info { flex: 1; }
.config-card-name { font-weight: 600; font-size: 14px; }
.config-card-meta { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.config-card-actions { display: flex; gap: 6px; align-items: flex-start; }
.config-rename-form { display: flex; gap: 6px; align-items: center; margin: 2px 0; }
.config-rename-form[hidden] { display: none; }
.config-rename-form .form-control { max-width: 280px; }
.header-from-config { color: var(--accent); }

/* Preview table */
.preview-card { margin-top: 16px; }
.preview-label { font-size: 12px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.4px; margin-bottom: 8px; }

/* Step indicator */
.steps { display: flex; gap: 0; margin-bottom: 24px; }
.step {
    flex: 1;
    text-align: center;
    padding: 10px 4px;
    font-size: 13px;
    color: var(--text-muted);
    border-bottom: 3px solid var(--border);
    transition: color 0.15s, border-color 0.15s;
    position: relative;
}
.step.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }
.step.done { color: #28a745; border-bottom-color: #28a745; }
.step-num { display: inline-flex; align-items: center; justify-content: center; width: 22px; height: 22px; border-radius: 50%; background: var(--border); color: var(--text-muted); font-size: 12px; font-weight: 700; margin-right: 6px; }
.step.active .step-num { background: var(--accent); color: #fff; }
.step.done .step-num { background: #28a745; color: #fff; }

/* Utility */
.hidden { display: none !important; }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }

/* Spinner */
.spinner { display: inline-block; width: 18px; height: 18px; border: 3px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Loading overlay */
.loading-overlay {
    position: fixed; inset: 0;
    background: rgba(255,255,255,0.7);
    display: flex; align-items: center; justify-content: center;
    z-index: 1000;
}


/* Login page */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg);
}
.login-container { width: 100%; max-width: 400px; padding: 20px; }
.login-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 4px 24px rgba(0,0,0,0.10);
    padding: 40px 36px;
}
.login-header { text-align: center; margin-bottom: 28px; }
.login-logo-img { height: 56px; width: auto; margin-bottom: 14px; }
.login-logo { font-size: 48px; color: var(--accent); margin-bottom: 12px; }
.login-title { font-size: 20px; font-weight: 700; color: var(--text); letter-spacing: 0.5px; }
.login-subtitle { color: var(--text-muted); font-size: 14px; margin-top: 4px; }
.login-form { display: flex; flex-direction: column; gap: 4px; }
.login-btn { width: 100%; justify-content: center; padding: 12px; font-size: 15px; margin-top: 8px; }

/* Dashboard free grid */
.dashboard-free-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    padding: 4px 0 8px;
}

/* Empty drop-zone cell */
.grid-empty-cell {
    min-height: 148px;
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    background: transparent;
    transition: border-color 0.15s, background 0.15s;
}
.grid-empty-cell.drop-target {
    border-color: var(--accent);
    border-style: solid;
    background: rgba(0, 79, 163, 0.05);
}
.dashboard-tile.drop-target {
    box-shadow: 0 0 0 3px var(--accent), var(--shadow);
}
.dashboard-tile {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    position: relative;
    cursor: grab;
    transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
    user-select: none;
}
.dashboard-tile:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 16px rgba(79,142,247,0.15);
}
.dashboard-tile.tile-dragging {
    opacity: 0.35;
    cursor: grabbing;
    pointer-events: none;
}
.tile-placeholder {
    background: transparent;
    border: 2px dashed var(--accent);
    opacity: 0.7;
    cursor: default;
    box-shadow: none;
    min-height: 140px;
}
.tile-placeholder:hover { border-color: var(--accent); box-shadow: none; transform: none; }
.tile-drag-handle {
    position: absolute;
    top: 8px;
    right: 10px;
    font-size: 18px;
    color: var(--border);
    cursor: grab;
    line-height: 1;
    padding: 2px 4px;
    border-radius: 3px;
    transition: color 0.15s;
}
.dashboard-tile:hover .tile-drag-handle { color: var(--text-muted); }
.tile-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 32px 20px 28px;
    text-decoration: none;
    color: var(--text);
}
.tile-link:hover .tile-label { color: var(--accent); }
.tile-icon { font-size: 38px; line-height: 1; }
.tile-label { font-size: 15px; font-weight: 600; text-align: center; transition: color 0.15s; }
.tile-description { font-size: 12px; color: var(--text-muted); text-align: center; line-height: 1.4; }

/* Admin badge in topbar */
.admin-badge {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--ems-yellow);
    color: #1a2540;
    padding: 2px 7px;
    border-radius: 10px;
    flex-shrink: 0;
}

/* Role badges in user list */
.role-badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 9px;
    border-radius: 10px;
    white-space: nowrap;
}
.role-admin { background: #e8f0fe; color: #1a56b8; }
.role-user  { background: #f0f3fa; color: var(--text-muted); }

/* Permission tags in user list */
.perm-tag {
    display: inline-block;
    font-size: 11px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px 7px;
    margin: 1px 2px;
    color: var(--text);
}

/* Permission checkbox grid */
.perm-grid {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.perm-checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 14px;
    transition: border-color 0.15s, background 0.15s;
}
.perm-checkbox-label:hover { border-color: var(--accent); background: #f5f8ff; }
.perm-checkbox-label input[type=checkbox] { width: 16px; height: 16px; cursor: pointer; accent-color: var(--accent); }