/* ═══════════════════════════════════════════════════════ Reset & base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

:root {
  --bg:        #0f1117;
  --surface:   #1a1d27;
  --surface2:  #21253a;
  --border:    #2d3154;
  --primary:   #4f46e5;
  --primary-h: #4338ca;
  --danger:    #b91c1c;
  --success:   #22c55e;
  --warn:      #f59e0b;
  --text:      #e2e4f0;
  --muted:     #9ca3af;
  --radius:    8px;
  --font:      -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --topbar-height: 52px;
}

html { min-width: 0; background: var(--bg); }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
  min-width: 0;
  overflow-x: hidden;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

button, input, select, textarea { font: inherit; }

:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 3px solid #a5b4fc;
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  z-index: 3000;
  top: 8px;
  left: 8px;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 14px;
  border-radius: var(--radius);
  background: #fff;
  color: #111827;
  font-weight: 700;
  transform: translateY(-160%);
  transition: transform .15s;
}
.skip-link:focus { transform: translateY(0); }

/* ═══════════════════════════════════════════════════════ Auth screen */
.auth-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  min-height: 100vh;
  padding: 24px;
  background: radial-gradient(ellipse at 50% 0%, #1e2060 0%, var(--bg) 60%);
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 36px 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 24px 48px rgba(0,0,0,.5);
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 28px;
  color: #fff;
}

.auth-tabs {
  display: flex;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 24px;
}

.auth-tab {
  flex: 1;
  padding: 8px 0;
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.9rem;
  transition: background .15s, color .15s;
}

.auth-tab.active {
  background: var(--primary);
  color: #fff;
}

.auth-form { display: flex; flex-direction: column; gap: 16px; }

.auth-link-row {
  margin-top: 2px;
  text-align: right;
}

.auth-inline-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  font-size: .85rem;
}

.auth-error {
  color: #fca5a5;
  font-size: 0.85rem;
  min-height: 0;
  display: none;
}
.auth-error.show { display: block; }

.auth-info {
  color: #86efac;
  font-size: 0.85rem;
  min-height: 0;
  display: none;
}
.auth-info.show { display: block; }

.auth-context-notice {
  margin: -8px 0 18px;
  padding: 10px 12px;
  border: 1px solid rgba(99, 102, 241, .55);
  border-radius: var(--radius);
  background: rgba(99, 102, 241, .12);
  color: #c7d2fe;
  font-size: .86rem;
}

.copyright {
  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
}

/* ═══════════════════════════════════════════════════════ App shell */
.app-shell {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  min-width: 0;
}

.topbar {
  height: var(--topbar-height);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  flex-shrink: 0;
  position: relative;
  z-index: 950;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
  white-space: nowrap;
  min-width: 0;
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.88rem;
  color: var(--muted);
  min-width: 0;
}

.app {
  display: flex;
  flex: 1;
  overflow: hidden;
  min-width: 0;
  position: relative;
}

.app-copyright {
  flex-shrink: 0;
  padding: 8px 16px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.mobile-menu-button,
.sidebar-backdrop {
  display: none;
}

/* ═══════════════════════════════════════════════════════ Sidebar */
.sidebar {
  width: 220px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 16px 0;
  overflow-y: auto;
  flex-shrink: 0;
}

.nav-section-label {
  padding: 8px 20px 4px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
}

.nav-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  cursor: pointer;
  border-radius: 0;
  color: var(--muted);
  transition: background .15s, color .15s;
  position: relative;
  appearance: none;
  border: 0;
  background: transparent;
  font-family: var(--font);
  font-size: inherit;
  text-align: left;
}

.nav-item:hover { background: var(--surface2); color: var(--text); }
.nav-item.active { background: var(--surface2); color: #fff; }
.nav-item-danger { color: #fca5a5; }
.nav-item-danger:hover { color: #fecaca; }
.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--primary);
  border-radius: 0 2px 2px 0;
}

.nav-icon { font-size: 1rem; }

.nav-count {
  margin-left: auto;
  background: var(--primary);
  color: #fff;
  font-size: 0.7rem;
  padding: 1px 6px;
  border-radius: 10px;
  display: none;
}
.nav-count.show { display: inline; }

.sidebar-copyright {
  display: none;
  color: var(--muted);
  font-size: .75rem;
  text-align: center;
}

/* ═══════════════════════════════════════════════════════ Main content */
.main {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 28px 32px;
  background: var(--bg);
  min-width: 0;
}

.panel { display: none; width: 100%; max-width: 900px; min-width: 0; }
.panel.active { display: block; }

.panel-header { margin-bottom: 24px; }
.panel-header h2 { font-size: 1.4rem; color: #fff; margin-bottom: 4px; }
.panel-header p { color: var(--muted); font-size: 0.9rem; }

.panel-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
  min-width: 0;
}

/* ═══════════════════════════════════════════════════════ Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  min-width: 0;
}

.card-title {
  padding: 14px 20px;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  color: #fff;
}

.card-body { padding: 16px 20px; }
.card-body p { color: var(--muted); line-height: 1.7; }

.device-onboarding-card {
  border-color: rgba(99, 102, 241, .62);
  background: linear-gradient(135deg, rgba(99, 102, 241, .13), var(--surface) 62%);
}

.device-onboarding-card .card-body {
  display: flex;
  align-items: center;
  gap: 20px;
}

.device-onboarding-copy {
  flex: 1;
  min-width: 0;
}

.device-onboarding-copy h3 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 4px;
}

.device-onboarding-copy p { overflow-wrap: anywhere; }

.device-onboarding-actions {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
  gap: 10px;
}

.device-limit-hint { flex: 1 0 100%; }

/* ═══════════════════════════════════════════════════════ Dashboard stats */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat-label { font-size: 0.8rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.stat-value { font-size: 2rem; font-weight: 700; color: #fff; line-height: 1; }
.stat-sub { font-size: 0.8rem; color: var(--muted); }

/* ═══════════════════════════════════════════════════════ Forms */
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 0.85rem; color: var(--muted); font-weight: 500; }
.field .hint { font-size: 0.78rem; font-weight: 400; color: var(--muted); }

input[type="text"], input[type="email"], input[type="password"],
select, textarea {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  padding: 10px 12px;
  width: 100%;
  transition: border-color .15s;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
}

textarea { resize: vertical; }

/* ═══════════════════════════════════════════════════════ Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.88rem;
  font-family: var(--font);
  font-weight: 500;
  transition: background .15s, opacity .15s;
  justify-content: center;
  text-align: center;
  text-decoration: none;
}

.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-full { width: 100%; justify-content: center; }
.btn-sm { padding: 4px 10px; font-size: 0.8rem; }

.btn-primary  { background: var(--primary);  color: #fff; }
.btn-primary:hover  { background: var(--primary-h); }
.btn-danger   { background: var(--danger);   color: #fff; }
.btn-danger:hover   { background: #991b1b; }
.btn-ghost    { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover    { background: var(--surface2); }

/* ═══════════════════════════════════════════════════════ Plan badge */
.plan-badge {
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.plan-free     { background: #374151; color: #f3f4f6; }
.plan-standard { background: #1e3a5f; color: #60a5fa; }
.plan-support  { background: #312e81; color: #a5b4fc; }

.plan-hint { font-size: 0.82rem; color: var(--muted); }

/* ═══════════════════════════════════════════════════════ Devices */
.device-list { display: flex; flex-direction: column; gap: 10px; }

.device-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.device-icon { font-size: 1.6rem; flex-shrink: 0; padding-top: 2px; }

.device-info { flex: 1; min-width: 0; }
.device-name { font-weight: 600; color: #fff; overflow-wrap: anywhere; }
.device-meta {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 2px;
  overflow-wrap: anywhere;
}

.device-token {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.75rem;
  color: #a5b4fc;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
  margin-top: 6px;
  word-break: break-all;
}

.device-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  flex-shrink: 0;
}

.device-advanced-actions summary {
  list-style: none;
  user-select: none;
}

.device-advanced-actions summary[aria-disabled="true"] {
  opacity: .5;
}

.device-advanced-actions summary::-webkit-details-marker { display: none; }

.device-advanced-actions summary::after {
  content: '▾';
  margin-left: 4px;
}

.device-advanced-actions[open] summary::after { content: '▴'; }

.device-advanced-action-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 8px;
}

/* ═══════════════════════════════════════════════════════ Tickets */
.ticket-list { display: flex; flex-direction: column; gap: 10px; }

.ticket-row {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: border-color .15s;
  width: 100%;
  appearance: none;
  color: inherit;
  font-family: var(--font);
  font-size: inherit;
  text-align: left;
}
.ticket-row:hover,
.ticket-row:focus-visible { border-color: var(--primary); }

.ticket-subject { flex: 1; font-weight: 500; color: #fff; }
.ticket-meta { font-size: 0.8rem; color: var(--muted); }

.status-chip {
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}
.status-open        { background: #1e3a5f; color: #60a5fa; }
.status-in-progress { background: #422006; color: #fb923c; }
.status-resolved    { background: #14532d; color: #4ade80; }

/* ═══════════════════════════════════════════════════════ Ticket thread */
.ticket-thread {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.thread-msg {
  padding: 14px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
}

.thread-msg.support { border-color: var(--primary); background: #1a1d3a; }

.thread-author {
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 6px;
}
.thread-msg.support .thread-author { color: #a5b4fc; }
.thread-body { color: var(--text); white-space: pre-wrap; }
.thread-body,
.download-note,
.plan-features li,
.panel-header p,
.card-body p { overflow-wrap: anywhere; }

.reply-box {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ═══════════════════════════════════════════════════════ Downloads */
.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.download-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.download-icon { font-size: 2.4rem; }
.download-label { font-size: 1.1rem; font-weight: 600; color: #fff; }
.download-note { font-size: 0.82rem; color: var(--muted); }

/* ═══════════════════════════════════════════════════════ Plan grid */
.plan-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.plan-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  transition: border-color .15s;
  min-width: 0;
}

.plan-card.current { border-color: var(--primary); }
.plan-card.current::after {
  content: 'Current';
  position: absolute;
  top: 12px; right: 12px;
  background: var(--primary);
  color: #fff;
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 10px;
}

.plan-name { font-size: 1.1rem; font-weight: 700; color: #fff; }
.plan-price { font-size: 2rem; font-weight: 800; color: #fff; }
.plan-price span { font-size: 1rem; font-weight: 400; color: var(--muted); }
.plan-features { list-style: none; display: flex; flex-direction: column; gap: 6px; }
.plan-features li { font-size: 0.87rem; color: var(--muted); }
.plan-features li::before { content: '✓ '; color: var(--success); }
.plan-confirm-price { font-size: 1.6rem; font-weight: 800; color: var(--text); }
.badge-beta {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 8px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  background: rgba(255, 196, 0, 0.18);
  color: #ffc400;
  border: 1px solid rgba(255, 196, 0, 0.45);
  border-radius: 999px;
  vertical-align: middle;
}

/* ═══════════════════════════════════════════════════════ Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
  overscroll-behavior: contain;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 100%;
  max-width: 480px;
  max-height: calc(100vh - 32px);
  max-height: calc(100dvh - 32px);
  box-shadow: 0 24px 48px rgba(0,0,0,.6);
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 0;
  flex: 0 0 auto;
  background: var(--surface);
}
.modal-header h3 { font-size: 1.1rem; color: #fff; overflow-wrap: anywhere; }
.modal-form {
  display: flex;
  flex: 1;
  flex-direction: column;
  min-height: 0;
}
.modal-close {
  width: 44px;
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--muted);
  font-size: 1.1rem;
}
.modal-body {
  padding: 20px 24px;
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
  overscroll-behavior: contain;
  min-height: 0;
}
.modal-footer {
  padding: 0 24px 20px;
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 10px;
  flex: 0 0 auto;
  background: var(--surface);
}

.token-box {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
}
.token-box code {
  flex: 1;
  min-width: 0;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.78rem;
  color: #a5b4fc;
  word-break: break-all;
}

.device-authorization-details {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.device-authorization-manual-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.device-authorization-manual-actions {
  display: flex;
  justify-content: flex-end;
}

.device-authorization-summary {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface2);
}

.device-authorization-summary > div {
  display: grid;
  grid-template-columns: minmax(90px, .7fr) minmax(0, 1.3fr);
  gap: 12px;
}

.device-authorization-summary dt {
  color: var(--muted);
  font-size: .8rem;
  font-weight: 600;
}

.device-authorization-summary dd {
  min-width: 0;
  color: var(--text);
  font-weight: 600;
  overflow-wrap: anywhere;
}

.device-authorization-summary .device-authorization-code {
  color: #c7d2fe;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 1rem;
  letter-spacing: .08em;
}

/* ═══════════════════════════════════════════════════════ Locked message */
.locked-msg {
  text-align: center;
  padding: 32px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.locked-msg h3 { font-size: 1.1rem; color: #fff; }
.locked-msg p { color: var(--muted); max-width: 360px; }

/* ═══════════════════════════════════════════════════════ Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  opacity: 0;
  transition: opacity .2s, transform .2s;
  pointer-events: none;
  z-index: 2000;
  width: max-content;
  max-width: min(92vw, 560px);
  white-space: normal;
  overflow-wrap: anywhere;
  text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ═══════════════════════════════════════════════════════ Misc */
.muted { color: var(--muted); }

.tbtn {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.85rem;
  font-family: var(--font);
  transition: background .15s;
}
.tbtn-ghost { background: transparent; color: var(--text); }
.tbtn-ghost:hover { background: var(--surface2); }

.empty-state {
  color: var(--muted);
  text-align: center;
  padding: 40px 16px;
  font-size: 0.9rem;
}

.loading-state {
  color: var(--muted);
  padding: 28px 16px;
  text-align: center;
}

.inline-error {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  padding: 12px 14px;
  border: 1px solid rgba(239, 68, 68, .65);
  border-radius: var(--radius);
  background: rgba(127, 29, 29, .22);
  color: #fecaca;
}

.inline-error .btn { flex: 0 0 auto; }

.policy-card {
  padding: 20px;
  overflow-wrap: anywhere;
}

.ticket-detail-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

body.modal-open {
  overflow: hidden;
}

/* A 768px tablet keeps the persistent sidebar, but its primary input is still
 * touch. Preserve the desktop layout while giving every actionable control a
 * dependable target size. The narrower mobile rules below remain free to use
 * their larger 48px device-management targets. */
@media (pointer: coarse) {
  .btn,
  .tbtn,
  .auth-tab,
  .nav-item {
    min-height: 44px;
  }
}

@media (max-width: 1024px) {
  .sidebar { width: 196px; }
  .main { padding: 24px 20px; }
  .download-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
  .plan-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
  .device-card { flex-wrap: wrap; }
  .device-actions { width: 100%; }
}

@media (max-width: 767px), (max-width: 960px) and (max-height: 600px) {
  :root { --topbar-height: calc(60px + env(safe-area-inset-top)); }

  body.navigation-open { overflow: hidden; }

  .topbar {
    padding: env(safe-area-inset-top) max(12px, env(safe-area-inset-right)) 0
      max(12px, env(safe-area-inset-left));
    gap: 8px;
  }

  .mobile-menu-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    min-width: 44px;
    min-height: 44px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: transparent;
    color: var(--text);
    cursor: pointer;
    font-size: 1.25rem;
  }

  .topbar-brand {
    gap: 7px;
    font-size: .92rem;
    flex: 1;
  }

  .topbar-user { gap: 8px; }
  #top_email { display: none; }

  .sidebar {
    position: fixed;
    z-index: 920;
    top: var(--topbar-height);
    bottom: 0;
    left: 0;
    width: min(86vw, 300px);
    padding: 12px 0 max(20px, env(safe-area-inset-bottom));
    border-right: 1px solid var(--border);
    box-shadow: 20px 0 48px rgba(0,0,0,.45);
    transform: translateX(-105%);
    visibility: hidden;
    pointer-events: none;
    transition: transform .2s ease, visibility 0s linear .2s;
    display: flex;
    flex-direction: column;
  }

  .sidebar.open {
    transform: translateX(0);
    visibility: visible;
    pointer-events: auto;
    transition: transform .2s ease;
  }

  .sidebar-backdrop {
    position: fixed;
    z-index: 910;
    inset: var(--topbar-height) 0 0;
    width: 100%;
    border: 0;
    background: rgba(0,0,0,.66);
    cursor: pointer;
  }

  .sidebar-backdrop.show { display: block; }

  .nav-item {
    min-height: 48px;
    padding: 11px 20px 11px max(20px, env(safe-area-inset-left));
  }

  .nav-section-label {
    padding-left: max(20px, env(safe-area-inset-left));
  }

  .sidebar-copyright {
    display: block;
    margin-top: auto;
    padding: 20px 16px 0;
  }

  .app { overflow: hidden; }

  .main {
    width: 100%;
    max-width: 100%;
    padding: 20px max(16px, env(safe-area-inset-right))
      calc(24px + env(safe-area-inset-bottom))
      max(16px, env(safe-area-inset-left));
  }

  .panel-header { margin-bottom: 20px; }
  .panel-header h2 { font-size: 1.3rem; }

  .stat-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .download-grid,
  .plan-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .stat-card {
    min-height: 122px;
    padding: 14px;
  }

  .stat-value {
    font-size: 1.5rem;
    overflow-wrap: anywhere;
  }

  .stat-sub { overflow-wrap: anywhere; }

  .download-card,
  .plan-card { padding: 18px; }

  .device-onboarding-card .card-body {
    align-items: stretch;
    flex-direction: column;
    gap: 14px;
  }

  .device-onboarding-card .btn { width: 100%; }

  .device-onboarding-actions {
    align-items: stretch;
    width: 100%;
  }

  .device-card {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    padding: 16px;
  }

  .device-actions {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    width: 100%;
  }

  .device-actions .btn {
    width: 100%;
    min-height: 48px !important;
    min-block-size: 48px;
  }

  .device-advanced-actions,
  .device-advanced-action-list {
    width: 100%;
  }

  .device-advanced-action-list {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }

  .ticket-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px 12px;
    padding: 16px;
  }

  .ticket-subject {
    grid-column: 1 / -1;
    min-width: 0;
    overflow-wrap: anywhere;
  }

  .ticket-meta { align-self: center; }

  .ticket-detail-header {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .ticket-detail-header > div {
    min-width: 0;
    flex: 1 1 180px;
  }

  .ticket-detail-header h2 { overflow-wrap: anywhere; }

  .panel-toolbar .plan-hint {
    flex: 1 0 100%;
  }

  .policy-card { padding: 16px; }

  .btn,
  .tbtn,
  .auth-tab {
    min-height: 44px;
  }

  input[type="text"],
  input[type="email"],
  input[type="password"],
  select,
  textarea {
    min-height: 44px;
    font-size: 16px;
  }

  input[type="checkbox"] {
    width: 22px;
    height: 22px;
    flex: 0 0 auto;
  }

  .toast {
    bottom: max(16px, env(safe-area-inset-bottom));
    left: max(16px, env(safe-area-inset-left));
    right: max(16px, env(safe-area-inset-right));
    width: max-content;
    max-width: calc(
      100vw - max(16px, env(safe-area-inset-left)) -
      max(16px, env(safe-area-inset-right))
    );
    margin-inline: auto;
    padding: 12px 16px;
    transform: translateY(12px);
  }

  .toast.show { transform: translateY(0); }

  .app-copyright {
    display: none;
  }
}

@media (max-width: 480px) {
  .auth-screen {
    justify-content: flex-start;
    padding: max(16px, env(safe-area-inset-top)) 12px
      max(20px, env(safe-area-inset-bottom));
  }

  .auth-card {
    margin-top: 4vh;
    padding: 26px 18px;
  }

  .auth-brand { margin-bottom: 22px; }

  .panel-toolbar {
    align-items: stretch;
  }

  .panel-toolbar .btn {
    flex: 1 1 100%;
    width: 100%;
  }

  .device-toolbar .device-limit-hint {
    order: -1;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
  }

  .card-title,
  .card-body { padding-left: 16px; padding-right: 16px; }

  .modal-overlay {
    align-items: flex-end;
    padding: 0;
  }

  .modal {
    max-width: none;
    max-height: calc(100vh - max(12px, env(safe-area-inset-top)));
    max-height: calc(100dvh - max(12px, env(safe-area-inset-top)));
    border-radius: 14px 14px 0 0;
    border-bottom: 0;
  }

  .modal-header {
    padding: 14px 16px 4px;
  }

  .modal-body {
    padding: 14px 16px;
  }

  .modal-footer {
    padding: 10px 16px max(16px, env(safe-area-inset-bottom));
    border-top: 1px solid var(--border);
  }

  .modal-footer .btn {
    flex: 1 1 120px;
    min-height: 44px;
  }

  .token-box {
    align-items: stretch;
    flex-direction: column;
  }

  .token-box .btn { width: 100%; }

  .device-authorization-manual-actions,
  .device-authorization-manual-actions .btn {
    width: 100%;
  }

  .device-authorization-manual-actions .btn {
    min-height: 44px;
  }

  .device-authorization-summary > div {
    grid-template-columns: minmax(0, 1fr);
    gap: 1px;
  }
}

@media (max-width: 420px) {
  .brand-portal-suffix { display: none; }
}

@media (max-width: 360px) {
  .topbar-user .plan-badge { display: none; }
  .topbar-user { margin-left: auto; }
}

@media (max-width: 960px) and (max-height: 600px) and (orientation: landscape) {
  .stat-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .stat-card {
    min-height: 108px;
    padding: 12px;
  }

  .modal-overlay {
    align-items: center;
    padding: max(8px, env(safe-area-inset-top))
      max(12px, env(safe-area-inset-right))
      max(8px, env(safe-area-inset-bottom))
      max(12px, env(safe-area-inset-left));
  }

  .modal {
    max-width: 560px;
    max-height: calc(100dvh - max(16px, env(safe-area-inset-top) + env(safe-area-inset-bottom)));
    border: 1px solid var(--border);
    border-radius: 12px;
  }

  .modal-body {
    padding: 10px 24px;
    gap: 8px;
  }
}

@media (max-height: 560px) {
  .auth-screen {
    justify-content: flex-start;
    padding: max(12px, env(safe-area-inset-top))
      max(12px, env(safe-area-inset-right))
      max(16px, env(safe-area-inset-bottom))
      max(12px, env(safe-area-inset-left));
  }

  .auth-card {
    padding: 22px;
  }

  .auth-brand { margin-bottom: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}