:root {
  --bg:          #F4F3EF;
  --bg-panel:    #EEEDE9;
  --bg-raised:   #E6E5E0;
  --bg-hover:    #DDDCD7;
  --cyan:        #0D0D0D;
  --cyan-dim:    #555555;
  --cyan-glow:   rgba(0,0,0,0.06);
  --cyan-faint:  rgba(0,0,0,0.03);
  --teal-border: #CCCBC6;
  --red:         #E8002A;
  --red-dim:     #AA0020;
  --red-glow:    rgba(232,0,42,0.14);
  --red-faint:   rgba(232,0,42,0.05);
  --green:       #00A843;
  --green-dim:   #008C38;
  --green-faint: rgba(0,168,67,0.08);
  --green-glow:  rgba(0,168,67,0.35);
  --white:       #0D0D0D;
  --muted:       #888887;
  --dim:         #D8D7D2;
  --mono: 'Share Tech Mono', monospace;
  --sans: 'Exo 2', sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--white);
  font-family: var(--sans);
  font-size: 15px;
  display: flex; flex-direction: column;
  background-image: repeating-linear-gradient(
    0deg, transparent, transparent 2px,
    rgba(0,0,0,0.03) 2px, rgba(0,0,0,0.03) 4px
  );
}
body::before {
  content: ''; position: fixed; inset: 0;
  background-image:
    linear-gradient(var(--teal-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--teal-border) 1px, transparent 1px);
  background-size: 40px 40px; opacity: 0.2; pointer-events: none; z-index: 0;
}
button { font: inherit; }
a { color: inherit; }

/* ── LOGIN ── */
#login-view, #change-password-view, #totp-view {
  position: relative; z-index: 1;
  flex: 1; display: flex; align-items: center; justify-content: center;
}
.login-card {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--teal-border);
  width: 360px;
  padding: 40px;
}
.login-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan-dim), transparent);
  opacity: 0.4;
}
.login-card::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 2px;
  background: var(--red); opacity: 0.7;
}
.logo-wrap { display: flex; flex-direction: column; align-items: center; gap: 16px; margin-bottom: 36px; }
.logo-mark-lg {
  width: 36px; height: 36px; border: 2px solid var(--red);
  transform: rotate(45deg); position: relative; box-shadow: 0 0 16px var(--red-glow);
  flex-shrink: 0;
}
.logo-mark-lg::after { content: ''; position: absolute; inset: 5px; background: var(--red); opacity: 0.45; }
.logo-text { text-align: center; }
.logo-name { font-family: var(--mono); font-size: 22px; letter-spacing: 0.14em; color: var(--cyan); }
.logo-name span { color: var(--red); }
.logo-sub { font-family: var(--mono); font-size: 10px; letter-spacing: 0.22em; color: var(--muted); margin-top: 3px; text-transform: uppercase; }

.form-group { margin-bottom: 20px; }
.form-label {
  display: block; font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em;
  color: var(--muted); text-transform: uppercase; margin-bottom: 8px;
}
.form-input, .form-select {
  width: 100%; background: var(--bg); border: 1px solid var(--teal-border); color: var(--cyan);
  font-family: var(--mono); font-size: 15px; padding: 10px 12px; outline: none;
  transition: border-color 0.15s, box-shadow 0.15s; letter-spacing: 0.04em;
}
.form-input:focus, .form-select:focus { border-color: var(--cyan-dim); box-shadow: 0 0 0 3px var(--cyan-glow); }
.form-input::placeholder { color: var(--dim); }
.form-input[type="password"] { letter-spacing: 0.2em; }
.form-input[type="password"]::placeholder { letter-spacing: 0.04em; }
.form-check { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.form-check input[type="checkbox"] { width: 14px; height: 14px; accent-color: var(--cyan); cursor: pointer; }
.form-check label {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em;
  color: var(--muted); text-transform: uppercase; cursor: pointer;
}

.error-msg { display: none; font-family: var(--mono); font-size: 12px; color: var(--red); background: var(--red-faint); border: 1px solid var(--red-dim); padding: 8px 12px; letter-spacing: 0.04em; }
.error-msg.visible { display: block; }

.btn-login {
  width: 100%; background: transparent; border: 1px solid var(--cyan-dim); color: var(--cyan);
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase;
  padding: 12px; cursor: pointer; transition: all 0.15s; position: relative; overflow: hidden;
}
.btn-login:hover:not(:disabled) { background: var(--cyan-faint); border-color: var(--cyan); }
.btn-login:disabled { opacity: 0.5; cursor: default; }
.btn-login.loading::after {
  content: ''; position: absolute; bottom: 0; left: -100%; width: 100%; height: 2px;
  background: var(--cyan); animation: loadbar 1s linear infinite;
}
@keyframes loadbar { to { left: 100%; } }

/* ── TOPBAR ── */
.topbar {
  position: relative; z-index: 10; flex-shrink: 0;
  display: flex; align-items: center; justify-content: space-between;
  height: 48px; padding: 0 20px;
  border-bottom: 1px solid var(--teal-border); background: var(--bg-panel);
}
.topbar-logo { display: flex; align-items: center; gap: 10px; }
.logo-mark { width: 20px; height: 20px; border: 1.5px solid var(--red); transform: rotate(45deg); position: relative; box-shadow: 0 0 8px var(--red-glow); flex-shrink: 0; }
.logo-mark::after { content: ''; position: absolute; inset: 3px; background: var(--red); opacity: 0.5; }

/* ── STATUS LED (stesso rombo del logo, in piccolo) ── */
.status-led {
  width: 10px; height: 10px; border: 1.5px solid var(--red);
  transform: rotate(45deg); position: relative; flex-shrink: 0;
  box-shadow: 0 0 6px var(--red-glow); display: inline-block;
}
.status-led::after { content: ''; position: absolute; inset: 2px; background: var(--red); opacity: 0.5; }
.status-led.online { border-color: var(--green); box-shadow: 0 0 6px var(--green-glow); }
.status-led.online::after { background: var(--green); }
.brand-text { font-family: var(--mono); font-size: 18px; letter-spacing: 0.12em; }
.brand-text span { color: var(--red); }
.topbar-right { display: flex; align-items: center; gap: 16px; }
.topbar-user {
  display: flex; align-items: center; gap: 7px; font-family: var(--mono); font-size: 12px;
  color: var(--cyan-dim); border: 1px solid var(--teal-border); padding: 3px 10px 3px 8px;
}
.btn {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 6px 14px; border: 1px solid var(--cyan-dim); color: var(--cyan);
  cursor: pointer; transition: all 0.15s; background: transparent;
}
.btn:hover { background: var(--cyan-faint); border-color: var(--cyan); }
.btn:disabled { opacity: 0.35; cursor: default; pointer-events: none; }
.btn-sm { padding: 4px 10px; font-size: 10px; }
.btn-add { padding: 3px 10px; font-size: 13px; line-height: 1; }

/* ── LAYOUT ── */
.layout { display: flex; flex: 1; overflow: hidden; position: relative; z-index: 1; }

/* ── SIDEBAR ── */
.sidebar {
  width: 200px; flex-shrink: 0;
  background: var(--bg-panel); border-right: 1px solid var(--teal-border);
  display: flex; flex-direction: column; padding: 16px 0; overflow-y: auto;
}
.sidebar-label {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em; color: var(--muted);
  padding: 0 20px; margin-bottom: 6px; text-transform: uppercase;
}
.sidebar-section { padding: 0 12px; margin-bottom: 20px; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 7px 10px; cursor: pointer;
  font-size: 13px; color: var(--cyan-dim); transition: all 0.15s;
  border: 1px solid transparent; margin-bottom: 2px;
  font-family: var(--sans); letter-spacing: 0.04em; text-transform: uppercase;
}
.nav-item:hover { background: var(--bg-hover); color: var(--cyan); border-color: var(--teal-border); }
.nav-item.active { background: var(--cyan-faint); color: var(--cyan); border-color: var(--cyan-dim); box-shadow: inset 3px 0 0 var(--cyan); }
.nav-icon { width: 14px; height: 14px; opacity: 0.6; flex-shrink: 0; }
.nav-item.active .nav-icon { opacity: 1; }

/* ── MAIN ── */
.main { flex: 1; overflow-y: auto; padding: 20px 24px; scrollbar-width: thin; scrollbar-color: var(--teal-border) transparent; }
.section { display: none; }
.section.active { display: block; }
.section-header { display: flex; align-items: baseline; gap: 14px; margin-bottom: 20px; padding-bottom: 10px; border-bottom: 1px solid var(--teal-border); }
.section-title { font-family: var(--mono); font-size: 13px; letter-spacing: 0.2em; color: var(--cyan); text-transform: uppercase; }
.section-subtitle { font-size: 12px; color: var(--muted); font-family: var(--mono); }

/* ── PANEL ── */
.panel { background: var(--bg-panel); border: 1px solid var(--teal-border); padding: 14px 16px; position: relative; }
.panel::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--cyan-dim), transparent); opacity: 0.3; }
.panel-title-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.panel-title { font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; color: var(--muted); text-transform: uppercase; }
.panel-count { font-family: var(--mono); font-size: 11px; color: var(--cyan-dim); }

/* ── FILTRI ── */
.filter-row { display: flex; gap: 8px; margin-bottom: 12px; }
.filter-row .form-input, .filter-row .form-select { width: auto; padding: 6px 10px; font-size: 12px; }
.filter-row .form-select { flex: 0 0 170px; }
.filter-row .form-input { flex: 1 1 auto; min-width: 0; }

/* ── LIST + DETAIL ── */
.list-detail { display: grid; grid-template-columns: 1fr 320px; gap: 16px; align-items: start; }
@media (max-width: 900px) { .list-detail { grid-template-columns: 1fr; } }

.detail-pane { background: var(--bg-panel); border: 1px solid var(--teal-border); padding: 16px; position: relative; min-height: 260px; }
.detail-pane::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--cyan-dim), transparent); opacity: 0.3; }
.detail-empty {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px; height: 100%; min-height: 228px;
  font-family: var(--mono); font-size: 12px; color: var(--muted);
  letter-spacing: 0.06em; text-align: center;
}
.detail-empty-icon { opacity: 0.25; }
.detail-actions { display: flex; justify-content: space-between; margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--teal-border); }

/* ── TABLE ── */
.table-wrap { overflow-x: auto; margin-bottom: 4px; }
.data-table { width: 100%; border-collapse: collapse; font-family: var(--mono); font-size: 12px; }
.data-table th { text-align: left; padding: 6px 8px; color: var(--muted); letter-spacing: 0.08em; border-bottom: 1px solid var(--teal-border); font-weight: 400; text-transform: uppercase; font-size: 10px; }
.data-table td { padding: 8px; color: var(--white); border-bottom: 1px solid var(--dim); }
.data-table tr:last-child td { border-bottom: none; }
.data-table tbody tr[data-id] { cursor: pointer; }
.data-table tbody tr[data-id]:hover td { background: var(--bg-raised); }
.data-table tbody tr.selected td { background: var(--cyan-faint); box-shadow: inset 3px 0 0 var(--cyan); }
.empty { color: var(--muted); font-family: var(--mono); font-size: 12px; padding: 10px 0; }

/* ── PILL ── */
.pill {
  font-family: var(--mono); font-size: 10px; padding: 2px 8px; border: 1px solid var(--teal-border);
  color: var(--cyan-dim); letter-spacing: 0.06em; text-transform: uppercase; white-space: nowrap;
}

/* ── KV ── */
.kv-row { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; padding: 9px 0; border-bottom: 1px solid var(--teal-border); }
.kv-row:last-child { border-bottom: none; }
.kv-label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; color: var(--muted); text-transform: uppercase; flex-shrink: 0; }
.kv-value { font-family: var(--mono); font-size: 13px; color: var(--cyan); text-align: right; word-break: break-all; }

/* ── MODAL ── */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.45); display: none; align-items: center; justify-content: center; z-index: 10000; }
.modal-box { background: var(--bg-panel); border: 1px solid var(--teal-border); padding: 28px 32px; min-width: 320px; max-width: 420px; font-family: var(--mono); position: relative; }
.modal-box.danger { border-color: var(--red-dim); }
.modal-title { font-size: 12px; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 18px; color: var(--cyan); }
.modal-title.danger { color: var(--red); }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 20px; }

/* ── BOTTOMBAR ── */
.bottombar {
  position: relative; z-index: 10; flex-shrink: 0;
  height: 24px; display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px; border-top: 1px solid var(--teal-border); background: var(--bg-panel);
  font-family: var(--mono); font-size: 11px; color: var(--muted); letter-spacing: 0.08em;
}
.bottombar span { color: var(--cyan-dim); }

/* ── RESPONSIVE ── */
html, body { overflow-x: hidden; }

/* Sidebar verticale -> barra di tab orizzontale sopra il contenuto. */
@media (max-width: 860px) {
  .layout { flex-direction: column; overflow: visible; }
  .sidebar {
    width: 100%; flex-direction: row; align-items: center;
    overflow-x: auto; overflow-y: hidden;
    border-right: none; border-bottom: 1px solid var(--teal-border);
    padding: 8px 12px; gap: 4px;
  }
  .sidebar-label { display: none; }
  .sidebar-section { display: flex; padding: 0; margin-bottom: 0; gap: 4px; flex-shrink: 0; }
  .nav-item { margin-bottom: 0; white-space: nowrap; }
  .main { padding: 16px; }
}

/* Tabella device: sotto i 640px restano solo LED, Nome, Cliente, VPN IP. */
@media (max-width: 640px) {
  #device-table th:nth-child(5), #device-table td:nth-child(5),
  #device-table th:nth-child(6), #device-table td:nth-child(6),
  #device-table th:nth-child(7), #device-table td:nth-child(7) {
    display: none;
  }
}

/* Telefono in verticale */
@media (max-width: 480px) {
  .login-card { width: 100%; max-width: 320px; padding: 28px 20px; }
  .topbar { padding: 0 12px; }
  .topbar-tag { display: none; }
  .topbar-user { padding: 3px 8px 3px 6px; gap: 5px; }
  .topbar-right { gap: 10px; }
  .section-header { flex-wrap: wrap; row-gap: 4px; }
  .filter-row { flex-wrap: wrap; }
  .filter-row .form-select, .filter-row .form-input { flex: 1 1 100%; }
  .modal-box { min-width: 0; width: calc(100vw - 40px); padding: 22px 20px; }
  .panel, .detail-pane { padding: 12px; }
}