:root {
  --bg: #07090f;
  --surface: #11151f;
  --surface-2: #181d2b;
  --surface-3: #1f2538;
  --border: #2a3147;
  --border-strong: #3a4360;
  --text: #e8ecf4;
  --text-dim: #8b95a8;
  --text-faint: #5a6378;
  --accent: #00d4ff;
  --accent-2: #00ff9d;
  --accent-glow: rgba(0, 212, 255, 0.15);
  --success: #00ff9d;
  --warning: #ffb800;
  --error: #ff5577;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --mono: 'JetBrains Mono', 'Cascadia Code', 'Consolas', 'Courier New', monospace;
}

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

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, sans-serif;
  min-height: 100vh;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 28px 20px;
  background-image:
    radial-gradient(circle at 8% 12%, rgba(0, 212, 255, 0.08) 0%, transparent 35%),
    radial-gradient(circle at 92% 88%, rgba(0, 255, 157, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(0, 212, 255, 0.02) 0%, transparent 60%);
}

.container {
  width: 100%;
  max-width: 760px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow:
    0 12px 48px rgba(0, 0, 0, 0.6),
    0 0 0 1px rgba(0, 212, 255, 0.05);
}

/* ===== Header ===== */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.shield {
  font-size: 34px;
  filter: drop-shadow(0 0 12px rgba(0, 212, 255, 0.4));
}

h1 {
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.3px;
}

.subtitle {
  font-size: 11px;
  color: var(--text-faint);
  font-family: var(--mono);
  letter-spacing: 0.3px;
  margin-top: 2px;
}

.security-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 12px;
  color: var(--text-dim);
}

.security-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-faint);
  transition: background 0.3s, box-shadow 0.3s;
}

.security-badge.unlocked {
  border-color: rgba(0, 255, 157, 0.3);
  color: var(--accent-2);
}

.security-badge.unlocked .dot {
  background: var(--accent-2);
  box-shadow: 0 0 12px var(--accent-2);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ===== Cards ===== */
.card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}

.card h2 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.hint {
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 18px;
}

.hint code {
  background: var(--bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}

/* ===== Dropzone ===== */
.dropzone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 24px;
  text-align: center;
  margin-bottom: 18px;
  transition: all 0.2s;
  background: var(--bg);
  cursor: pointer;
}

.dropzone:hover {
  border-color: var(--accent);
  background: rgba(0, 212, 255, 0.03);
}

.dropzone.dragover {
  border-color: var(--accent);
  background: rgba(0, 212, 255, 0.08);
  transform: scale(1.01);
}

.dropzone-icon {
  font-size: 30px;
  display: block;
  margin-bottom: 8px;
  opacity: 0.7;
}

.dropzone-content code {
  background: var(--surface-3);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}

.dim { color: var(--text-dim); }
.dim.small { font-size: 11px; }

.link {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: inherit;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 3px;
  font-family: inherit;
}

.link.warn { color: var(--warning); }

.dropzone-loaded {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 13px;
}

.dropzone-loaded .ok {
  color: var(--success);
  font-size: 18px;
  font-weight: bold;
}

/* ===== Form fields ===== */
.field {
  margin-bottom: 18px;
}

.field label,
.panel label {
  display: block;
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  font-weight: 600;
}

.password-row {
  display: flex;
  gap: 8px;
}

input[type="password"], input[type="text"] {
  flex: 1;
  width: 100%;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-family: var(--mono);
  transition: all 0.15s;
}

input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.icon-btn {
  width: 46px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 16px;
  transition: all 0.15s;
}

.icon-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.strength-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin-top: 10px;
  overflow: hidden;
}

.strength-fill {
  height: 100%;
  width: 0%;
  background: var(--error);
  transition: width 0.3s, background 0.3s;
}

.strength-label {
  font-size: 11px;
  color: var(--text-faint);
  margin-top: 6px;
  font-family: var(--mono);
}

/* ===== Buttons ===== */
.primary-btn {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--accent), #0095cc);
  border: none;
  border-radius: var(--radius-sm);
  color: #001218;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
  letter-spacing: 0.2px;
}

.primary-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(0, 212, 255, 0.3);
  filter: brightness(1.05);
}

.primary-btn:active:not(:disabled) {
  transform: translateY(0);
}

.primary-btn:disabled {
  background: var(--surface-3);
  color: var(--text-faint);
  cursor: not-allowed;
}

.secondary-btn {
  padding: 10px 16px;
  background: var(--surface-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.secondary-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0, 212, 255, 0.04);
}

.ghost-btn {
  width: 100%;
  padding: 12px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 13px;
  cursor: pointer;
  margin-top: 16px;
  transition: all 0.15s;
}

.ghost-btn:hover {
  color: var(--warning);
  border-color: var(--warning);
}

/* ===== Workspace ===== */
.workspace { margin-top: 4px; }

.tabs {
  display: flex;
  gap: 4px;
  background: var(--surface-2);
  padding: 4px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  border: 1px solid var(--border);
}

.tab {
  flex: 1;
  padding: 11px;
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}

.tab:hover { color: var(--text); }

.tab.active {
  background: var(--surface-3);
  color: var(--accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.panel { display: none; }
.panel.active { display: block; }

textarea {
  width: 100%;
  padding: 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  resize: vertical;
  transition: all 0.15s;
}

textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea[readonly] {
  background: var(--surface-2);
  color: var(--text-dim);
}

.options-row {
  margin: 12px 0;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text-dim);
}

.checkbox input { accent-color: var(--accent); width: 16px; height: 16px; }

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.lock-row { margin-top: 8px; }

/* ===== Footer ===== */
footer {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.status {
  font-size: 13px;
  color: var(--text-dim);
  font-family: var(--mono);
  padding: 8px 12px;
  background: var(--bg);
  border-radius: var(--radius-xs);
  margin-bottom: 10px;
  border: 1px solid var(--border);
}

.status.success { color: var(--success); border-color: rgba(0, 255, 157, 0.2); }
.status.warning { color: var(--warning); border-color: rgba(255, 184, 0, 0.2); }
.status.error   { color: var(--error);   border-color: rgba(255, 85, 119, 0.3); }
.status.working { color: var(--accent);  border-color: rgba(0, 212, 255, 0.2); }

/* ===== Bridge mode link ===== */
.bridge-link {
  margin-top: 14px;
  text-align: center;
  font-size: 12px;
}
.bridge-link .link { color: var(--warning); }

.workspace.bridge-mode {
  border: 1px solid var(--warning);
  border-radius: var(--radius);
  padding: 16px;
  background: rgba(255, 184, 0, 0.03);
  position: relative;
}
.workspace.bridge-mode::before {
  content: '🌉 MODALITÀ PONTE — nessuna chiave su questo PC, solo trasporto audio';
  display: block;
  font-size: 11px;
  color: var(--warning);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
  font-weight: 700;
  text-align: center;
}

/* ===== Audio modem status ===== */
.audio-status {
  margin-top: 14px;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.audio-progress {
  height: 6px;
  background: var(--surface-3);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 8px;
}
.audio-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.15s;
  box-shadow: 0 0 8px var(--accent);
}
.audio-label {
  font-size: 12px;
  font-family: var(--mono);
  color: var(--text-dim);
  display: inline-block;
}
.audio-status .link { font-size: 12px; margin-left: 10px; }

/* ===== Mobile ===== */
@media (max-width: 600px) {
  .container { padding: 18px; }
  header { flex-direction: column; align-items: flex-start; }
  h1 { font-size: 18px; }
  .actions { flex-direction: column; }
  .secondary-btn { width: 100%; }
}