:root {
  --bg:       #faf9f0;
  --card:     #ffffff;
  --accent:   #d97757;
  --accent-h: #c4613d;
  --text:     #131314;
  --muted:    #87867f;
  --border:   #e8e6dc;
  --sidebar:  #f2f1e8;
  --danger:   #d64f3a;
  --success:  #2d9b5e;
  --font:     -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --mono:     'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  --radius:   12px;
  --shadow:   0 1px 3px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.04);
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--card);
  border-radius: var(--radius);
  padding: 2.5rem;
  box-shadow: var(--shadow);
}

.login-logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: 2rem;
}

.logo-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.logo-text {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -.02em;
}

.logo-gradient {
  background: linear-gradient(135deg, #818cf8, #38bdf8, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.login-card h1 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -.03em;
  margin-bottom: 1.5rem;
}

.error-msg {
  background: #fef0ee;
  color: var(--danger);
  padding: .75rem 1rem;
  border-radius: 8px;
  font-size: .875rem;
  margin-bottom: 1rem;
}

/* ── LAYOUT ─────────────────────────────────── */
#app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  min-height: 100vh;
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1rem;
  position: fixed;
  top: 0; left: 0; bottom: 0;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem .75rem;
  margin-bottom: 2rem;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .25rem;
  flex: 1;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .6rem .75rem;
  border-radius: 8px;
  text-decoration: none;
  color: var(--muted);
  font-size: .9rem;
  font-weight: 500;
  transition: background .15s, color .15s;
}

.nav-link svg {
  width: 16px; height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  flex-shrink: 0;
}

.nav-link:hover { background: rgba(0,0,0,.04); color: var(--text); }
.nav-link.active { background: var(--accent); color: #fff; }
.nav-link.active svg { stroke: #fff; }

.sidebar-footer { padding-top: 1rem; }

.main-content {
  margin-left: 220px;
  flex: 1;
  padding: 2rem 2.5rem;
  max-width: calc(100vw - 220px);
}

/* ── PAGES ─────────────────────────────────── */
.page { display: none; }
.page.active { display: block; }

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.page-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -.03em;
}

/* ── CARDS ─────────────────────────────────── */
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.25rem;
  transition: transform .2s ease, box-shadow .2s ease;
}

.card:hover { transform: scale(1.005); box-shadow: 0 2px 6px rgba(0,0,0,.08), 0 8px 24px rgba(0,0,0,.06); }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  font-weight: 600;
  font-size: .95rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.stat-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow);
  transition: transform .2s ease;
}

.stat-card:hover { transform: scale(1.02); }
.stat-label { font-size: .8rem; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; margin-bottom: .4rem; }
.stat-value { font-size: 1.8rem; font-weight: 700; letter-spacing: -.04em; color: var(--text); }
.stat-accent { color: var(--accent); }

/* ── TABLE ─────────────────────────────────── */
.table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.table th {
  text-align: left;
  padding: .75rem 1rem;
  border-bottom: 1px solid var(--border);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--muted);
  font-weight: 600;
}
.table td { padding: .85rem 1rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table tr:last-child td { border-bottom: none; }
.table tbody tr { transition: background .1s; }
.table tbody tr:hover { background: rgba(0,0,0,.02); }

.badge {
  display: inline-block;
  padding: .2rem .6rem;
  border-radius: 20px;
  font-size: .75rem;
  font-weight: 600;
}
.badge-ok  { background: #e8f5ee; color: var(--success); }
.badge-warn { background: #fff4e5; color: #b45309; }
.badge-err { background: #fef0ee; color: var(--danger); }

/* ── BUTTONS ─────────────────────────────────── */
.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: .55rem 1.25rem;
  border-radius: 8px;
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, transform .1s;
}
.btn-primary:hover { background: var(--accent-h); }
.btn-primary:active { transform: scale(.97); }
.btn-full { width: 100%; padding: .75rem; font-size: 1rem; }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: .5rem 1rem;
  border-radius: 8px;
  font-size: .875rem;
  cursor: pointer;
  transition: background .15s;
}
.btn-ghost:hover { background: rgba(0,0,0,.04); }

.btn-danger {
  background: transparent;
  border: none;
  color: var(--danger);
  padding: .3rem .6rem;
  border-radius: 6px;
  font-size: .8rem;
  cursor: pointer;
  transition: background .15s;
}
.btn-danger:hover { background: #fef0ee; }

.btn-sm {
  padding: .3rem .75rem;
  border-radius: 6px;
  font-size: .8rem;
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  color: var(--muted);
  transition: all .15s;
}
.btn-sm.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.actions-cell { white-space: nowrap; }

.export-wrap { display: inline-flex; align-items: center; gap: .35rem; margin-left: .4rem; }

.select-sm {
  padding: .28rem .45rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  font-size: .78rem;
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
}

.btn-export {
  padding: .3rem .65rem;
  border-radius: 6px;
  font-size: .78rem;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
  cursor: pointer;
  transition: all .15s;
}
.btn-export:hover { background: var(--accent); color: #fff; }
.btn-export-dl { padding: .3rem .5rem; opacity: .7; }

.btn-group { display: flex; gap: .4rem; }

.btn-copy {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .3rem .75rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  font-size: .8rem;
  cursor: pointer;
  transition: all .15s;
}
.btn-copy:hover { border-color: var(--accent); color: var(--accent); }

/* ── FORM ─────────────────────────────────── */
.field { margin-bottom: 1rem; }
.field label { display: block; font-size: .85rem; font-weight: 500; margin-bottom: .4rem; color: var(--text); }

input[type="text"], input[type="password"], input[type="number"], input[type="date"], select {
  width: 100%;
  padding: .6rem .9rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: .9rem;
  background: var(--bg);
  color: var(--text);
  transition: border-color .15s;
  outline: none;
  font-family: var(--font);
}
input:focus, select:focus { border-color: var(--accent); }

/* ── NODES ─────────────────────────────────── */
.nodes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.node-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: transform .2s ease;
}
.node-card:hover { transform: scale(1.02); }
.node-name { font-weight: 700; font-size: 1rem; margin-bottom: .5rem; }
.node-status { display: flex; align-items: center; gap: .5rem; font-size: .875rem; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.dot-ok  { background: var(--success); box-shadow: 0 0 0 3px rgba(45,155,94,.15); }
.dot-err { background: var(--danger);  box-shadow: 0 0 0 3px rgba(214,79,58,.15); }
.node-meta { margin-top: .75rem; font-size: .82rem; color: var(--muted); line-height: 1.8; }

.bandwidth-card {}
.bw-display { display: flex; gap: 3rem; padding: .5rem 0; }
.bw-item { display: flex; flex-direction: column; }
.bw-label { font-size: .8rem; color: var(--muted); margin-bottom: .25rem; }
.bw-value { font-size: 1.75rem; font-weight: 700; letter-spacing: -.04em; font-family: var(--mono); color: var(--accent); }

/* ── SUBSCRIPTIONS ─────────────────────────── */
.sub-link-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .85rem 0;
  border-bottom: 1px solid var(--border);
  gap: 1rem;
}
.sub-link-row:last-child { border-bottom: none; }
.sub-link-label { font-size: .85rem; font-weight: 600; color: var(--muted); min-width: 90px; }
.sub-link-url {
  flex: 1;
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── CERTS ─────────────────────────────────── */
.cert-info-grid { display: grid; grid-template-columns: auto 1fr; gap: .5rem 1.5rem; font-size: .9rem; }
.cert-key { color: var(--muted); font-size: .85rem; }
.cert-actions { display: flex; gap: .75rem; margin-top: 1.25rem; }

.log-area {
  background: #131314;
  color: #a0cfab;
  font-family: var(--mono);
  font-size: .8rem;
  padding: 1rem;
  border-radius: 8px;
  min-height: 120px;
  max-height: 320px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ── MODAL ─────────────────────────────────── */
.modal { position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.35); }
.modal-box {
  position: relative;
  background: var(--card);
  border-radius: var(--radius);
  padding: 2rem;
  width: 100%;
  max-width: 460px;
  box-shadow: 0 20px 60px rgba(0,0,0,.15);
  z-index: 1;
}
.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.5rem; }
.modal-header h3 { font-size: 1.1rem; font-weight: 700; }
.modal-close { background: none; border: none; font-size: 1.1rem; cursor: pointer; color: var(--muted); }
.modal-actions { display: flex; gap: .75rem; justify-content: flex-end; margin-top: 1.5rem; }

/* ── TOAST ─────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--text);
  color: #fff;
  padding: .75rem 1.25rem;
  border-radius: 8px;
  font-size: .875rem;
  z-index: 999;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .25s, transform .25s;
}
.toast.show { opacity: 1; transform: translateY(0); }

/* ── CHART ─────────────────────────────────── */
.chart-card canvas { display: block; }

/* ── UTILITIES ─────────────────────────────── */
.muted { color: var(--muted); font-size: .85rem; }
.text-accent { color: var(--accent); }