@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ===== DARK THEME ===== */
:root, [data-theme="dark"] {
  --bg:        #1e2130;
  --surface:   #252839;
  --raised:    #2d3148;
  --sidebar:   #1a1d2e;
  --border:    #363b58;
  --text:      #dde2f5;
  --muted:     #8891b8;
  --dim:       #525a7e;
  --accent:    #6b9fff;
  --acc-h:     #82b0ff;
  --acc-dim:   rgba(107,159,255,.15);
  --green:     #6ec97f;
  --green-bg:  rgba(110,201,127,.12);
  --yellow:    #e8b84b;
  --yellow-bg: rgba(232,184,75,.12);
  --red:       #f07888;
  --red-bg:    rgba(240,120,136,.12);
  --teal:      #5ecfbe;
  --teal-bg:   rgba(94,207,190,.12);
  --purple:    #c49cf7;
  --purple-bg: rgba(196,156,247,.12);
  --shadow:    0 2px 12px rgba(0,0,0,.4);
  --btn-text:  #1e2130;
  --tog-track: #363b58;
}

/* ===== LIGHT THEME ===== */
[data-theme="light"] {
  --bg:        #eef0f8;
  --surface:   #ffffff;
  --raised:    #e4e7f5;
  --sidebar:   #f4f5fc;
  --border:    #cdd2ea;
  --text:      #1c2040;
  --muted:     #5e6a94;
  --dim:       #99a3c4;
  --accent:    #3d6ef0;
  --acc-h:     #2e5edb;
  --acc-dim:   rgba(61,110,240,.1);
  --green:     #1f9e44;
  --green-bg:  rgba(31,158,68,.1);
  --yellow:    #a87300;
  --yellow-bg: rgba(168,115,0,.1);
  --red:       #d13252;
  --red-bg:    rgba(209,50,82,.1);
  --teal:      #0a8a7a;
  --teal-bg:   rgba(10,138,122,.1);
  --purple:    #6c3bbf;
  --purple-bg: rgba(108,59,191,.1);
  --shadow:    0 2px 12px rgba(60,70,120,.1);
  --btn-text:  #ffffff;
  --tog-track: #cdd2ea;
}

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

body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  transition: background .25s, color .25s;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--acc-h); }

::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ===== SIDEBAR ===== */
.sidebar {
  width: 230px;
  min-width: 230px;
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  z-index: 200;
  transition: background .25s, border-color .25s;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 22px 20px;
  border-bottom: 1px solid var(--border);
}

.brand-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  flex-shrink: 0;
  object-fit: contain;
}

.brand-text { font-size: 15px; font-weight: 700; color: var(--text); }
.brand-sub  { font-size: 11px; color: var(--dim); }

.sidebar-nav { flex: 1; padding: 14px 12px; overflow-y: auto; }

.nav-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--dim);
  padding: 14px 10px 6px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  transition: all .15s;
  margin-bottom: 2px;
}

.nav-icon { font-size: 16px; width: 22px; text-align: center; flex-shrink: 0; }
.nav-link:hover  { background: var(--raised); color: var(--text); }
.nav-link.active { background: var(--acc-dim); color: var(--accent); font-weight: 600; }

.sidebar-foot { padding: 12px; border-top: 1px solid var(--border); }
.sidebar-foot .nav-link { color: var(--red); }
.sidebar-foot .nav-link:hover { background: var(--red-bg); }

/* ===== MAIN ===== */
.main-content {
  margin-left: 230px;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  position: sticky; top: 0; z-index: 100;
  background: var(--sidebar);
  border-bottom: 1px solid var(--border);
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background .25s, border-color .25s;
}

.topbar-title { font-size: 16px; font-weight: 600; color: var(--text); }

.topbar-right { display: flex; align-items: center; gap: 18px; }

.site-tag {
  font-size: 12px;
  color: var(--dim);
  background: var(--raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
}

/* ===== THEME TOGGLE ===== */
.toggle-wrap { display: flex; align-items: center; gap: 8px; }
.toggle-lbl  { font-size: 12px; color: var(--muted); font-weight: 500; }

.toggle {
  position: relative;
  width: 46px; height: 26px;
  cursor: pointer; flex-shrink: 0;
}
.toggle input { display: none; }

.tog-track {
  position: absolute; inset: 0;
  background: var(--tog-track);
  border-radius: 26px;
  border: 1px solid var(--border);
  transition: background .25s;
}

.tog-knob {
  position: absolute;
  top: 4px; left: 4px;
  width: 16px; height: 16px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 1px 4px rgba(0,0,0,.3);
  transition: transform .25s, background .25s;
}
.toggle input:checked ~ .tog-knob { transform: translateX(20px); }

/* ===== PAGE ===== */
.page-body { padding: 28px; flex: 1; }

/* ===== CARD ===== */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: 22px;
  transition: background .25s, border-color .25s;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  font-weight: 600;
}

.card-body  { padding: 20px; }
.card-body.flush { padding: 0; }

/* ===== KPI GRID ===== */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
  margin-bottom: 22px;
}

.kpi {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  position: relative;
  overflow: hidden;
  transition: border-color .2s, background .25s;
}
.kpi:hover { border-color: var(--accent); }
.kpi::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
}
.kpi-val   { font-size: 26px; font-weight: 700; color: var(--accent); line-height: 1; }
.kpi-label { font-size: 11px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .05em; margin-top: 6px; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all .15s;
  white-space: nowrap;
  text-decoration: none;
  line-height: 1.4;
}

.btn-sm { padding: 6px 13px; font-size: 13px; }
.btn-xs { padding: 4px 10px; font-size: 12px; }

.btn-primary { background: var(--accent); color: var(--btn-text); border-color: var(--accent); }
.btn-primary:hover { background: var(--acc-h); border-color: var(--acc-h); color: var(--btn-text); }

.btn-success { background: var(--green-bg); color: var(--green); border-color: var(--green); }
.btn-success:hover { background: var(--green); color: #fff; }

.btn-warn    { background: var(--yellow-bg); color: var(--yellow); border-color: var(--yellow); }
.btn-warn:hover { background: var(--yellow); color: #fff; }

.btn-danger  { background: var(--red-bg); color: var(--red); border-color: var(--red); }
.btn-danger:hover { background: var(--red); color: #fff; }

.btn-ghost {
  background: var(--raised);
  color: var(--muted);
  border-color: var(--border);
}
.btn-ghost:hover { color: var(--text); border-color: var(--muted); }

.btn:disabled { opacity: .4; cursor: not-allowed; }

/* ===== TABLE ===== */
.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }

.tbl thead th {
  background: var(--raised);
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 11px 16px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  white-space: nowrap;
}

.tbl tbody tr { border-bottom: 1px solid var(--border); transition: background .1s; }
.tbl tbody tr:hover { background: var(--raised); }
.tbl tbody tr:last-child { border-bottom: none; }
.tbl td { padding: 11px 16px; vertical-align: middle; }

.tr { text-align: right; }
.tc { text-align: center; }

/* ===== BADGES ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  white-space: nowrap;
  border: 1px solid;
}

.badge.urgent        { color: var(--red);    background: var(--red-bg);    border-color: var(--red); }
.badge.rewrite-title { color: var(--yellow); background: var(--yellow-bg); border-color: var(--yellow); }
.badge.expand-kw     { color: var(--teal);   background: var(--teal-bg);   border-color: var(--teal); }
.badge.expand-thin   { color: var(--purple); background: var(--purple-bg); border-color: var(--purple); }
.badge.healthy       { color: var(--green);  background: var(--green-bg);  border-color: var(--green); }
.badge.default       { color: var(--muted);  background: var(--raised);    border-color: var(--border); }

/* ===== INPUTS ===== */
.inp, .sel {
  background: var(--raised);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color .15s;
}
.inp:focus, .sel:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--acc-dim); }
.inp::placeholder { color: var(--dim); }
.sel option { background: var(--surface); }

/* ===== URL CELL ===== */
.url-cell {
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== FILTER PANEL ===== */
.filter-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  margin-bottom: 22px;
  transition: background .25s, border-color .25s;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 10px;
}

.filter-row:last-child { margin-bottom: 0; }

/* ===== LOGIN ===== */
.login-page {
  min-height: 100vh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}

.login-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 44px 40px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow);
}

.login-logo { text-align: center; margin-bottom: 32px; }
.login-logo .ico { font-size: 40px; margin-bottom: 12px; }
.login-logo h1 { font-size: 22px; font-weight: 700; color: var(--text); }
.login-logo p  { font-size: 13px; color: var(--muted); margin-top: 4px; }

.form-group { margin-bottom: 18px; }

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
  margin-bottom: 7px;
}

.form-ctrl {
  width: 100%;
  background: var(--raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 11px 14px;
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: border-color .15s;
}
.form-ctrl:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--acc-dim); }

.btn-login {
  width: 100%;
  padding: 13px;
  background: var(--accent);
  color: var(--btn-text);
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background .15s;
  font-family: inherit;
  margin-top: 6px;
}
.btn-login:hover { background: var(--acc-h); }

.alert-err {
  background: var(--red-bg);
  border: 1px solid var(--red);
  color: var(--red);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13px;
  margin-bottom: 18px;
}

/* ===== MISC ===== */
.spinner {
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .6s linear infinite;
  vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

.chart-box { position: relative; height: 230px; width: 100%; }

/* ===== DATATABLES ===== */
.dataTables_wrapper { font-size: 14px; color: var(--text); }
div.dataTables_wrapper { padding: 14px 20px; }

.dataTables_wrapper .dataTables_length select,
.dataTables_wrapper .dataTables_filter input {
  background: var(--raised);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 7px;
  padding: 6px 10px;
  font-family: inherit;
  font-size: 13px;
  outline: none;
}

.dataTables_wrapper .dataTables_info { color: var(--muted); font-size: 13px; }

.dataTables_wrapper .dataTables_paginate .paginate_button {
  color: var(--muted) !important;
  border-radius: 7px !important;
  border: 1px solid transparent !important;
  padding: 5px 11px !important;
  font-size: 13px;
  margin: 0 2px;
}
.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
  background: var(--raised) !important;
  color: var(--text) !important;
  border-color: var(--border) !important;
}
.dataTables_wrapper .dataTables_paginate .paginate_button.current {
  background: var(--acc-dim) !important;
  color: var(--accent) !important;
  border-color: var(--accent) !important;
  font-weight: 700;
}
.dataTables_wrapper .dataTables_paginate .paginate_button.disabled,
.dataTables_wrapper .dataTables_paginate .paginate_button.disabled:hover {
  color: var(--dim) !important;
}

table.dataTable thead th { border-bottom: 1px solid var(--border) !important; }
table.dataTable.no-footer { border-bottom: 1px solid var(--border) !important; }
table.dataTable tbody tr  { background: transparent !important; }
table.dataTable tbody tr:hover { background: var(--raised) !important; }

/* ===== CLUSTER CARDS ===== */
.cluster-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 10px;
  overflow: hidden;
}
.cluster-hdr {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  cursor: pointer;
  user-select: none;
  transition: background .15s;
}
.cluster-hdr:hover { background: var(--raised); }
.cluster-body { display: none; border-top: 1px solid var(--border); }
.cluster-body.open { display: block; }

.status-badge { /* alias */ }
.status-badge.urgent        { color: var(--red);    background: var(--red-bg);    border: 1px solid var(--red);    border-radius: 20px; padding: 3px 10px; font-size: 11px; font-weight: 700; }
.status-badge.rewrite-title { color: var(--yellow); background: var(--yellow-bg); border: 1px solid var(--yellow); border-radius: 20px; padding: 3px 10px; font-size: 11px; font-weight: 700; }
.status-badge.expand-kw     { color: var(--teal);   background: var(--teal-bg);   border: 1px solid var(--teal);   border-radius: 20px; padding: 3px 10px; font-size: 11px; font-weight: 700; }
.status-badge.expand-thin   { color: var(--purple); background: var(--purple-bg); border: 1px solid var(--purple); border-radius: 20px; padding: 3px 10px; font-size: 11px; font-weight: 700; }
.status-badge.healthy       { color: var(--green);  background: var(--green-bg);  border: 1px solid var(--green);  border-radius: 20px; padding: 3px 10px; font-size: 11px; font-weight: 700; }
.status-badge.default       { color: var(--muted);  background: var(--raised);    border: 1px solid var(--border); border-radius: 20px; padding: 3px 10px; font-size: 11px; font-weight: 700; }

/* ===== CORE UPDATE SIMULATOR ===== */

/* Tab navigation */
.cu-tabs { display: flex; gap: 6px; margin-bottom: 22px; }
.cu-tab {
  padding: 10px 20px; border-radius: 8px; font-size: 14px; font-weight: 600;
  color: var(--muted); background: var(--surface); border: 1px solid var(--border);
  cursor: pointer; text-decoration: none; transition: all .15s;
}
.cu-tab:hover { color: var(--text); border-color: var(--muted); }
.cu-tab.active { color: var(--accent); background: var(--acc-dim); border-color: var(--accent); }

/* Tier badges */
.tier-badge {
  display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 20px;
  font-size: 11px; font-weight: 700; white-space: nowrap; border: 1px solid;
}
.tier-excellent { color: var(--green);  background: var(--green-bg);  border-color: var(--green); }
.tier-good      { color: var(--accent); background: var(--acc-dim);   border-color: var(--accent); }
.tier-poor      { color: var(--yellow); background: var(--yellow-bg); border-color: var(--yellow); }
.tier-toxic     { color: var(--red);    background: var(--red-bg);    border-color: var(--red); }

/* Score number coloring */
.score-excellent { color: var(--green); }
.score-good      { color: var(--accent); }
.score-poor      { color: var(--yellow); }
.score-toxic     { color: var(--red); }

/* Distribution bar */
.dist-bar { display: flex; height: 32px; border-radius: 8px; overflow: hidden; margin: 12px 0; }
.dist-segment {
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; color: #fff; min-width: 30px;
  transition: width .5s ease;
}
.dist-excellent { background: var(--green); }
.dist-good      { background: var(--accent); }
.dist-poor      { background: var(--yellow); }
.dist-toxic     { background: var(--red); }

/* Module score bars */
.module-bar-wrap { margin-bottom: 10px; }
.module-bar-label {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px; font-weight: 600; margin-bottom: 4px;
}
.module-bar-label .mod-score { font-weight: 700; }
.module-bar {
  height: 8px; border-radius: 4px; background: var(--raised); overflow: hidden;
}
.module-bar-fill {
  height: 100%; border-radius: 4px; transition: width .5s ease;
}

/* Fix cards */
.fix-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 18px 20px; margin-bottom: 12px; border-left: 4px solid var(--border);
  transition: border-color .15s, background .15s;
}
.fix-card:hover { background: var(--raised); }
.fix-card.fix-high   { border-left-color: var(--red); }
.fix-card.fix-medium { border-left-color: var(--yellow); }
.fix-card.fix-low    { border-left-color: var(--green); }

.fix-header { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.fix-impact {
  padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 700; text-transform: uppercase;
}
.fix-impact.impact-high   { color: var(--red);    background: var(--red-bg); }
.fix-impact.impact-medium { color: var(--yellow); background: var(--yellow-bg); }
.fix-impact.impact-low    { color: var(--green);  background: var(--green-bg); }

.fix-summary { font-size: 14px; font-weight: 600; color: var(--text); }
.fix-meta { font-size: 12px; color: var(--muted); margin-bottom: 10px; }
.fix-meta .fix-url {
  font-family: 'Inter', monospace; color: var(--accent); word-break: break-all;
}

.fix-steps { margin: 12px 0; padding: 14px 18px; background: var(--raised); border-radius: 8px; }
.fix-steps-title { font-size: 12px; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 8px; }
.fix-steps ol { margin: 0; padding-left: 18px; }
.fix-steps li { font-size: 13px; color: var(--text); line-height: 1.7; }
.fix-estimate { font-size: 12px; color: var(--teal); font-weight: 600; margin-top: 8px; }

.fix-actions { display: flex; gap: 8px; margin-top: 12px; }

/* Extended details (textual blueprint overlaps) */
.fix-extended {
  margin-top: 10px; padding: 12px 16px; background: var(--red-bg);
  border-left: 3px solid var(--red); border-radius: 6px; font-size: 13px;
}
.fix-extended blockquote {
  font-style: italic; color: var(--muted); margin: 6px 0;
  padding-left: 12px; border-left: 2px solid var(--border);
}
.fix-extended .overlap-pages { font-size: 12px; color: var(--dim); margin-bottom: 8px; }

/* Multiplier indicators */
.multiplier-val { font-size: 26px; font-weight: 700; line-height: 1; }
.mult-good   { color: var(--green); }
.mult-warn   { color: var(--yellow); }
.mult-danger { color: var(--red); }

/* Filter pill buttons */
.filter-pills { display: flex; gap: 6px; margin-bottom: 18px; flex-wrap: wrap; }
.filter-pill {
  padding: 6px 14px; border-radius: 20px; font-size: 13px; font-weight: 600;
  border: 1px solid var(--border); background: var(--surface); color: var(--muted);
  cursor: pointer; transition: all .15s; text-decoration: none;
}
.filter-pill:hover { border-color: var(--accent); color: var(--text); }
.filter-pill.active { background: var(--acc-dim); color: var(--accent); border-color: var(--accent); }

/* Empty state */
.empty-state {
  text-align: center; padding: 60px 20px; color: var(--muted);
}
.empty-state .empty-icon { font-size: 48px; margin-bottom: 16px; }
.empty-state h3 { font-size: 18px; color: var(--text); margin-bottom: 8px; }
.empty-state p { font-size: 14px; }

/* Cluster health table */
.cu-cluster-bar { display: inline-block; height: 6px; border-radius: 3px; vertical-align: middle; }