:root {
  --bg-primary: #0f1923;
  --bg-secondary: #1a2332;
  --bg-card: #1e2d3d;
  --bg-input: #253545;
  --border: #2a3a4a;
  --text-primary: #e0e6ed;
  --text-secondary: #8899aa;
  --text-muted: #5a6a7a;
  --accent: #00b4d8;
  --accent-hover: #0096c7;
  --success: #4ade80;
  --warning: #fbbf24;
  --error: #f87171;
  --nav-height: 48px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
}

.topnav {
  display: flex;
  align-items: center;
  height: var(--nav-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
}

.nav-brand {
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
  margin-right: 32px;
  letter-spacing: 0.5px;
}

.nav-links { display: flex; gap: 4px; }

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.15s;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-card);
}

.nav-link.active {
  color: var(--accent);
  background: rgba(0, 180, 216, 0.1);
}

.nav-link.disabled {
  color: var(--text-muted);
  background: rgba(248, 113, 113, 0.08);
  pointer-events: none;
  opacity: 0.5;
}

.nav-internet {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 12px;
}

.nav-internet-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: background 0.3s, box-shadow 0.3s;
}

.nav-internet-dot.connected {
  background: var(--success);
  box-shadow: 0 0 6px rgba(74, 222, 128, 0.5);
}

.nav-internet-dot.disconnected {
  background: var(--error);
  box-shadow: 0 0 6px rgba(248, 113, 113, 0.5);
}

.nav-internet-label {
  font-size: 12px;
  color: var(--text-secondary);
}

.nav-internet-label.connected {
  color: var(--success);
}

.nav-internet-label.disconnected {
  color: var(--error);
}

.nav-clock {
  margin-right: 12px;
}

.content {
  margin-top: var(--nav-height);
  padding: 20px;
  min-height: calc(100vh - var(--nav-height));
}

/* Shared components */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  color: var(--text-primary);
  background: var(--bg-input);
}

.btn:hover { background: var(--border); }

.btn-save {
  background: var(--accent);
  color: #fff;
}

.btn-save:hover { background: var(--accent-hover); }

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

h2 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

h3 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

input[type="number"],
input[type="text"],
select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  padding: 6px 10px;
  font-size: 14px;
  width: 100%;
  outline: none;
  transition: border-color 0.15s;
}

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

input[type="checkbox"] {
  appearance: none;
  width: 36px;
  height: 20px;
  background: var(--bg-input);
  border-radius: 10px;
  cursor: pointer;
  position: relative;
  transition: background 0.2s;
  flex-shrink: 0;
}

input[type="checkbox"]::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: var(--text-secondary);
  border-radius: 50%;
  transition: all 0.2s;
}

input[type="checkbox"]:checked {
  background: var(--accent);
}

input[type="checkbox"]:checked::after {
  left: 18px;
  background: #fff;
}

input[type="range"] {
  -webkit-appearance: none;
  background: var(--bg-input);
  height: 4px;
  border-radius: 2px;
  outline: none;
  border: none;
  padding: 0;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
}

.dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 6px;
}

.dot-green { background: var(--success); }
.dot-red { background: var(--error); }
.dot-unknown { background: var(--text-muted); }

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  z-index: 1000;
  transition: opacity 0.3s, transform 0.3s;
  transform: translateY(0);
}

.toast.hidden {
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
}

.toast.success {
  background: #065f46;
  color: #a7f3d0;
}

.toast.error {
  background: #7f1d1d;
  color: #fecaca;
}

/* Night mode */

.nav-clock {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

.night-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  cursor: pointer;
  user-select: none;
}

.night-toggle input {
  display: none;
}

.night-toggle-track {
  width: 44px;
  height: 24px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 12px;
  position: relative;
  transition: all 0.25s;
}

.night-toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  transition: all 0.25s;
}

.night-toggle input:checked ~ .night-toggle-track {
  background: #7f1d1d;
  border-color: #f87171;
}

.night-toggle input:checked ~ .night-toggle-track .night-toggle-thumb {
  left: 22px;
  background: #f87171;
}

.night-toggle-label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

.night-toggle input:checked ~ .night-toggle-label {
  color: #f87171;
}

.night-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(180, 0, 0, 0.15);
  pointer-events: none;
  z-index: 9999;
}

.night-overlay.active {
  display: block;
}

/* Language Switcher */

.lang-switcher {
  position: relative;
  margin-left: 12px;
}

.lang-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 3px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-family: inherit;
  transition: color 0.15s, border-color 0.15s;
  min-width: 34px;
  text-align: center;
}

.lang-btn:hover,
.lang-btn[aria-expanded="true"] {
  color: var(--text-primary);
  border-color: var(--accent);
}

.lang-dropdown {
  position: absolute;
  inset-inline-end: 0;
  top: calc(100% + 6px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  min-width: 130px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  z-index: 200;
}

.lang-option {
  display: block;
  width: 100%;
  padding: 8px 14px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 13px;
  text-align: start;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.1s, color 0.1s;
}

.lang-option:hover {
  background: var(--bg-input);
  color: var(--text-primary);
}

.lang-option.active {
  color: var(--accent);
}

/* Demo token gate */
.demo-gate {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(10, 16, 24, 0.92);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.demo-gate[hidden] { display: none; }

.demo-gate-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  padding: 28px 28px 24px;
  width: 100%;
  max-width: 420px;
}

.demo-gate-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.demo-gate-sub {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 18px;
  line-height: 1.5;
}

.demo-gate-form { display: flex; flex-direction: column; gap: 10px; }

.demo-gate-input {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  padding: 10px 12px;
  font-size: 14px;
  letter-spacing: 1.5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  text-transform: uppercase;
}

.demo-gate-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(0, 180, 216, 0.2);
}

.demo-gate-submit {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.demo-gate-submit:hover { background: var(--accent-hover); }
.demo-gate-submit:disabled { opacity: 0.6; cursor: not-allowed; }

.demo-gate-error {
  color: var(--error);
  font-size: 12px;
  min-height: 16px;
}

.demo-gate-cta {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-secondary);
}

.demo-gate-cta a {
  display: inline-block;
  margin-top: 8px;
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 8px 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.demo-gate-cta a:hover {
  background: var(--accent);
  color: #fff;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }