/* ════════════════════════════════════════
   TOKENS
════════════════════════════════════════ */
:root {
  --primary:      #2563eb;
  --primary-dark: #1d4ed8;
  --primary-bg:   #eff6ff;
  --sidebar:      #0f172a;
  --text:         #0f172a;
  --text2:        #334155;
  --muted:        #64748b;
  --border:       #e2e8f0;
  --surface:      #ffffff;
  --bg:           #f1f5f9;
  --success:      #059669;
  --danger:       #dc2626;
  --warning:      #d97706;
  --r:            8px;
  --nav-h:        52px;
}

/* ════════════════════════════════════════
   RESET
════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
button { cursor: pointer; font-family: inherit; }
input  { font-family: inherit; }
input, button { outline: none; }

/* ════════════════════════════════════════
   VIEWS
════════════════════════════════════════ */
.view { display: none; height: 100%; }
.view.active { display: flex; flex-direction: column; }

/* ════════════════════════════════════════
   LOGIN
════════════════════════════════════════ */
#view-login {
  background: var(--sidebar);
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
.login-card {
  background: var(--surface);
  border-radius: 16px;
  padding: 40px;
  width: 360px;
  box-shadow: 0 24px 64px rgba(0,0,0,.45);
}
.login-brand { text-align: center; margin-bottom: 28px; }
.login-brand .logo-mark {
  display: inline-flex; align-items: center; gap: 10px; justify-content: center;
}
.login-brand .logo-sq   { width: 32px; height: 32px; background: var(--primary); border-radius: 8px; }
.login-brand .logo-name { font-size: 22px; font-weight: 700; color: var(--text); letter-spacing: -.5px; }
.login-brand .logo-sub  { color: var(--muted); font-size: 13px; margin: 8px 0 0; }
.login-field { margin-bottom: 14px; }
.login-field input {
  width: 100%; padding: 10px 14px;
  border: 1.5px solid var(--border); border-radius: var(--r);
  font-size: 14px; color: var(--text); background: var(--bg);
  transition: border-color .15s;
}
.login-field input:focus { border-color: var(--primary); background: #fff; }
.login-btn {
  width: 100%; padding: 11px;
  background: var(--primary); color: #fff;
  border: none; border-radius: var(--r);
  font-size: 14px; font-weight: 600; margin-top: 4px;
  transition: background .15s;
}
.login-btn:hover { background: var(--primary-dark); }
.login-btn:disabled { opacity: .6; cursor: default; }
.login-err { color: var(--danger); font-size: 13px; text-align: center; margin-top: 12px; min-height: 18px; }

/* ════════════════════════════════════════
   NAVBAR
════════════════════════════════════════ */
.navbar {
  height: var(--nav-h);
  background: var(--sidebar);
  display: flex; align-items: center;
  padding: 0 20px; gap: 12px;
  flex-shrink: 0;
  box-shadow: 0 1px 0 rgba(255,255,255,.06);
  z-index: 100;
}
.nav-brand { display: flex; align-items: center; gap: 8px; text-decoration: none; flex-shrink: 0; }
.nav-brand .logo-sq   { width: 26px; height: 26px; background: var(--primary); border-radius: 6px; }
.nav-brand .logo-name { font-size: 16px; font-weight: 700; color: #fff; letter-spacing: -.3px; }
.nav-sep { flex: 1; }
.nav-label {
  font-size: 13px; color: #94a3b8; font-weight: 500;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 400px;
}
.nav-user { display: flex; align-items: center; gap: 6px; color: #94a3b8; font-size: 13px; }
.nav-user i { font-size: 15px; }
.nav-logout {
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 6px; color: #94a3b8;
  font-size: 12px; padding: 5px 12px; margin-left: 4px;
  transition: all .15s;
}
.nav-logout:hover { background: rgba(255,255,255,.14); color: #fff; }

/* ════════════════════════════════════════
   FILE BROWSER
════════════════════════════════════════ */
#view-browser { flex-direction: column; }
.browser-body { flex: 1; overflow-y: auto; padding: 28px; }
.breadcrumb-bar {
  display: flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--muted); margin-bottom: 22px;
}
.breadcrumb-bar a { color: var(--primary); }
.breadcrumb-bar a:hover { text-decoration: underline; }
.bc-sep { color: var(--border); }
.file-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px,1fr)); gap: 12px; }
.file-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 16px;
  display: flex; align-items: center; gap: 12px;
  cursor: pointer; transition: all .15s; user-select: none;
}
.file-card:hover { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-bg); }
.file-card.folder .fc-icon { color: #f59e0b; font-size: 22px; width: 28px; text-align: center; }
.file-card.lab    .fc-icon { color: var(--primary); font-size: 20px; width: 28px; text-align: center; }
.fc-info { flex: 1; overflow: hidden; }
.fc-name { font-weight: 600; font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fc-meta { font-size: 11px; color: var(--muted); margin-top: 2px; }
.browser-empty { text-align: center; padding: 60px 20px; color: var(--muted); font-size: 14px; }
.browser-empty i { font-size: 40px; display: block; margin-bottom: 12px; opacity: .4; }
.spinner-wrap { display: flex; align-items: center; justify-content: center; padding: 60px; }
.spinner {
  width: 28px; height: 28px;
  border: 3px solid var(--border); border-top-color: var(--primary);
  border-radius: 50%; animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ════════════════════════════════════════
   LAB LAYOUT
════════════════════════════════════════ */
#view-lab { flex-direction: column; }
.lab-body { flex: 1; display: flex; overflow: hidden; min-height: 0; }

/* ════════════════════════════════════════
   SIDEBAR
════════════════════════════════════════ */
.node-sidebar {
  width: 260px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Section label */
.sb-label {
  padding: 12px 16px 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sb-label span {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
}

/* Bulk action buttons */
.sb-actions {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
  padding: 10px 12px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sb-action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 9px 6px;
  border-radius: 8px;
  border: none;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .02em;
  cursor: pointer;
  transition: opacity .15s, transform .1s;
  font-family: inherit;
  line-height: 1;
}
.sb-action-btn i { font-size: 15px; }
.sb-action-btn:disabled { opacity: .35; cursor: default; }
.sb-action-btn:not(:disabled):active { transform: scale(.96); }

.sb-start { background: #059669; color: #fff; }
.sb-start:not(:disabled):hover { opacity: .85; }

.sb-stop  { background: #dc2626; color: #fff; }
.sb-stop:not(:disabled):hover  { opacity: .85; }

.sb-wipe  { background: #92400e; color: #fff; }
.sb-wipe:not(:disabled):hover  { opacity: .85; }

/* Node list */
.node-list {
  flex: 1;
  overflow-y: auto;
  padding: 6px 8px;
  min-height: 0;
}

/* Node row */
.node-row {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 8px; border-radius: 6px; margin-bottom: 2px;
  transition: background .12s;
}
.node-row:hover { background: var(--bg); }
.node-dot {
  width: 8px; height: 8px; border-radius: 50%;
  flex-shrink: 0; transition: background .3s;
}
.node-dot.up       { background: var(--success); box-shadow: 0 0 0 2px #dcfce7; }
.node-dot.down     { background: #cbd5e1; }
.node-dot.starting { background: var(--warning); animation: pulse .8s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }
.nr-info { flex: 1; overflow: hidden; }
.nr-name { font-size: 12px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.nr-type { font-size: 10px; color: var(--muted); }
.nr-actions { display: flex; gap: 3px; flex-shrink: 0; }
.nr-btn {
  width: 24px; height: 24px;
  border-radius: 5px; border: 1px solid var(--border);
  background: #fff; color: var(--text2);
  font-size: 10px; display: flex; align-items: center; justify-content: center;
  transition: all .12s; cursor: pointer; padding: 0;
}
.nr-btn:hover { border-color: var(--primary); color: var(--primary); }
.nr-toggle.nr-start:hover { border-color: var(--success); color: var(--success); }
.nr-toggle.nr-stop:hover  { border-color: var(--danger);  color: var(--danger); }

/* Snapshot trigger button at bottom of sidebar */
.sb-snap-trigger {
  display: flex; align-items: center; gap: 10px;
  padding: 13px 16px;
  border: none;
  border-top: 2px solid var(--border);
  background: var(--sidebar);
  color: #94a3b8;
  font-size: 13px; font-weight: 600;
  cursor: pointer;
  transition: background .15s, color .15s;
  text-align: left;
  flex-shrink: 0;
  font-family: inherit;
}
.sb-snap-trigger:hover { background: #1e293b; color: #fff; }
.sb-snap-trigger i:first-child { color: #60a5fa; font-size: 15px; }
.sb-snap-trigger:hover i:first-child { color: #93c5fd; }
.sb-snap-trigger span { flex: 1; }
.sb-snap-trigger-arrow { font-size: 14px; opacity: .6; }
.sb-snap-trigger:hover .sb-snap-trigger-arrow { opacity: 1; }

/* ════════════════════════════════════════
   TOPOLOGY
════════════════════════════════════════ */
.topo-wrap { flex: 1; overflow: auto; background: #f8fafc; position: relative; min-width: 0; }
.topo-canvas { position: relative; min-width: 100%; min-height: 100%; }
.topo-svg { position: absolute; top: 0; left: 0; pointer-events: none; }
.topo-node {
  position: absolute; display: flex; flex-direction: column;
  align-items: center; cursor: pointer; width: 80px;
  transform: translate(-50%,-50%); user-select: none;
}
.topo-node:hover .tn-body { box-shadow: 0 0 0 3px var(--primary-bg); border-color: var(--primary); }
.tn-body {
  width: 56px; height: 56px;
  background: var(--surface); border: 2px solid var(--border); border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  position: relative; transition: all .15s;
}
.tn-body img { width: 36px; height: 36px; object-fit: contain; }
.tn-body i   { font-size: 22px; color: var(--muted); }
.tn-status {
  position: absolute; top: -4px; right: -4px;
  width: 12px; height: 12px; border-radius: 50%;
  border: 2px solid #f8fafc;
}
.tn-status.up       { background: var(--success); }
.tn-status.down     { background: #cbd5e1; }
.tn-status.starting { background: var(--warning); animation: pulse .8s infinite; }
.tn-label {
  margin-top: 5px; font-size: 11px; font-weight: 600; color: var(--text2);
  text-align: center; max-width: 80px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  background: rgba(248,250,252,.92); border-radius: 4px; padding: 1px 4px;
}
.topo-node.topo-net { cursor: default; }
.topo-node.topo-net:hover .tn-body { box-shadow: none; border-color: var(--border); }
.tn-body.tn-net { border-style: dashed; background: #f8fafc; }
.tn-net i { color: #94a3b8; font-size: 20px; }
.topo-empty {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  text-align: center; color: var(--muted);
}
.topo-empty i { font-size: 48px; display: block; margin-bottom: 12px; opacity: .3; }

/* ════════════════════════════════════════
   SNAPSHOT DRAWER
════════════════════════════════════════ */
.snap-drawer {
  position: fixed; inset: 0;
  z-index: 500;
  pointer-events: none;
  display: flex; justify-content: flex-end;
}
.snap-drawer.open { pointer-events: all; }

/* dim overlay */
.snap-overlay {
  position: absolute; inset: 0;
  background: rgba(0,0,0,.35);
  opacity: 0;
  transition: opacity .25s ease;
  backdrop-filter: blur(1px);
}
.snap-drawer.open .snap-overlay { opacity: 1; }

/* slide-in panel */
.snap-panel {
  position: relative;
  width: 420px;
  max-width: 92vw;
  background: var(--surface);
  display: flex; flex-direction: column;
  box-shadow: -8px 0 40px rgba(0,0,0,.18);
  transform: translateX(100%);
  transition: transform .28s cubic-bezier(.4,0,.2,1);
  height: 100%;
  overflow: hidden;
}
.snap-drawer.open .snap-panel { transform: translateX(0); }

/* panel header — matches navbar style */
.snap-panel-hdr {
  background: var(--sidebar);
  padding: 0 20px;
  height: var(--nav-h);
  display: flex; align-items: center; gap: 12px;
  flex-shrink: 0;
}
.snap-panel-hdr-title {
  display: flex; align-items: center; gap: 10px;
  color: #fff; font-size: 15px; font-weight: 700;
  flex: 1;
}
.snap-panel-hdr-title i { color: #94a3b8; font-size: 16px; }
.snap-panel-hdr-lab {
  font-size: 11px; color: #475569;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 5px; padding: 2px 8px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 120px;
}
.snap-close-btn {
  width: 32px; height: 32px;
  border-radius: 7px; border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.07); color: #94a3b8;
  font-size: 14px; display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all .15s; flex-shrink: 0;
}
.snap-close-btn:hover { background: rgba(255,255,255,.15); color: #fff; }

/* scrollable body */
.snap-panel-body {
  flex: 1; overflow-y: auto;
  padding: 20px;
  display: flex; flex-direction: column; gap: 16px;
  background: var(--bg);
}

/* ── Snap cards — match file-card look ── */
.snap-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.snap-card-hdr {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 16px 16px 12px;
  border-bottom: 1px solid var(--border);
}
.snap-card-icon {
  font-size: 20px; flex-shrink: 0; margin-top: 1px;
}
.snap-card-icon--blue  { color: var(--primary); }
.snap-card-icon--green { color: var(--success); }

.snap-card-hdr > div { flex: 1; }
.snap-card-title { font-size: 14px; font-weight: 700; color: var(--text); }
.snap-card-sub   { font-size: 12px; color: var(--muted); margin-top: 2px; }

/* refresh icon button */
.snap-icon-btn {
  width: 30px; height: 30px; flex-shrink: 0;
  border-radius: 7px; border: 1px solid var(--border);
  background: var(--bg); color: var(--muted);
  font-size: 12px; display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all .15s;
}
.snap-icon-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-bg); }

/* snap list area */
.snap-list-wrap { padding: 12px 16px; }
.snap-empty {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 20px 0; color: var(--muted); font-size: 13px; text-align: center;
}
.snap-empty i { font-size: 28px; opacity: .4; }

/* snapshot items */
.snap-list { display: flex; flex-direction: column; gap: 6px; }
.snap-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1.5px solid var(--border);
  cursor: pointer; background: var(--surface);
  transition: all .15s; user-select: none;
}
.snap-item:hover   { border-color: var(--primary); background: var(--primary-bg); }
.snap-item.selected {
  border-color: var(--primary); background: var(--primary-bg);
}
.snap-item i { font-size: 16px; color: var(--muted); flex-shrink: 0; }
.snap-item.selected i { color: var(--primary); }
.snap-item-name {
  flex: 1; font-size: 13px; font-weight: 500;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.snap-item.selected .snap-item-name { color: var(--primary); font-weight: 700; }
.snap-item-actions {
  display: flex; align-items: center; gap: 6px; flex-shrink: 0;
}
.snap-item-check {
  width: 18px; height: 18px; border-radius: 50%; flex-shrink: 0;
  border: 2px solid var(--border); display: flex; align-items: center; justify-content: center;
  font-size: 9px; transition: all .15s;
}
.snap-item.selected .snap-item-check {
  background: var(--primary); border-color: var(--primary); color: #fff;
}
.snap-item-del {
  width: 22px; height: 22px; border-radius: 5px; flex-shrink: 0;
  border: 1px solid var(--border); background: transparent; color: var(--muted);
  font-size: 10px; display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all .12s; padding: 0; opacity: 0;
}
.snap-item:hover .snap-item-del { opacity: 1; }
.snap-item-del:hover { border-color: var(--danger); color: var(--danger); background: #fee2e2; }

/* card footer / action area */
.snap-card-footer { padding: 12px 16px; }

/* primary buttons — consistent with login-btn */
.snap-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; padding: 10px;
  border: none; border-radius: 8px;
  font-size: 13px; font-weight: 600; cursor: pointer;
  transition: all .15s; font-family: inherit;
}
.snap-btn:disabled { opacity: .4; cursor: default; }
.snap-btn--primary { background: var(--primary); color: #fff; }
.snap-btn--primary:not(:disabled):hover { background: var(--primary-dark); }
.snap-btn--green   { background: var(--success); color: #fff; width: auto; padding: 10px 16px; }
.snap-btn--green:not(:disabled):hover   { background: #047857; }

/* input group */
.snap-input-row {
  display: flex; gap: 8px; align-items: stretch;
  padding: 12px 16px 4px;
}
.snap-text-inp {
  flex: 1;
  padding: 9px 12px;
  border: 1.5px solid var(--border); border-radius: 8px;
  font-size: 13px; color: var(--text); background: var(--bg);
  transition: border-color .15s; min-width: 0;
}
.snap-text-inp:focus { border-color: var(--primary); background: #fff; outline: none; }
.snap-text-inp::placeholder { color: #94a3b8; }

/* create status */
.snap-create-status { font-size: 12px; color: var(--muted); padding: 6px 16px 12px; min-height: 28px; }
.snap-create-status.ok    { color: var(--success); }
.snap-create-status.error { color: var(--danger); }
.snap-progress-row {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; color: var(--text2); margin: 3px 0;
}
.snap-progress-row .dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.snap-progress-row .dot.ok   { background: var(--success); }
.snap-progress-row .dot.fail { background: var(--danger); }
.snap-progress-row .dot.busy { background: var(--warning); animation: pulse .8s infinite; }

/* ════════════════════════════════════════
   MODALS
════════════════════════════════════════ */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.5);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; backdrop-filter: blur(2px);
}
.modal-box {
  background: var(--surface); border-radius: 16px;
  padding: 32px; width: 380px; max-width: 90vw;
  box-shadow: 0 24px 64px rgba(0,0,0,.3); text-align: center;
}
.modal-icon      { font-size: 36px; color: var(--danger); margin-bottom: 12px; }
.modal-icon-warn { font-size: 36px; color: var(--primary); margin-bottom: 12px; }
.modal-title { font-size: 17px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.modal-body  { font-size: 13px; color: var(--muted); line-height: 1.6; margin-bottom: 24px; }
.modal-actions { display: flex; gap: 10px; justify-content: center; }
.modal-btn {
  padding: 9px 24px; border-radius: 8px; border: none;
  font-size: 13px; font-weight: 600; cursor: pointer; transition: all .15s; font-family: inherit;
}
.modal-cancel  { background: var(--bg); color: var(--text2); border: 1px solid var(--border); }
.modal-cancel:hover { background: var(--border); }
.modal-confirm { background: var(--danger); color: #fff; }
.modal-confirm:hover { background: #b91c1c; }
.modal-confirm-blue { background: var(--primary); color: #fff; display: flex; align-items: center; gap: 7px; }
.modal-confirm-blue:hover { background: var(--primary-dark); }

/* ════════════════════════════════════════
   TOASTS
════════════════════════════════════════ */
.toast-container {
  position: fixed; bottom: 20px; right: 20px;
  display: flex; flex-direction: column; gap: 8px; z-index: 9999;
}
.toast {
  padding: 11px 16px; border-radius: var(--r);
  font-size: 13px; font-weight: 500;
  box-shadow: 0 4px 20px rgba(0,0,0,.15);
  animation: slide-in .2s ease; max-width: 320px;
}
@keyframes slide-in {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}
.toast.info    { background: var(--sidebar); color: #fff; }
.toast.success { background: var(--success); color: #fff; }
.toast.error   { background: var(--danger);  color: #fff; }
.toast.warn    { background: var(--warning); color: #fff; }