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

:root {
  --bg:      #0f1117;
  --surface: #1a1d27;
  --border:  #2e3347;
  --accent:  #7c6af7;
  --accent2: #5ad8a6;
  --text:    #e2e5f0;
  --muted:   #7a7f9a;
  --danger:  #f06a6a;
  --radius:  10px;
  font-family: 'Segoe UI', system-ui, sans-serif;
}

:root[data-theme="light"] {
  --bg:      #f4f5f9;
  --surface: #ffffff;
  --border:  #d0d4e4;
  --accent:  #6254d6;
  --accent2: #1fa87a;
  --text:    #1a1d27;
  --muted:   #6b7080;
  --danger:  #d94f4f;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg:      #f4f5f9;
    --surface: #ffffff;
    --border:  #d0d4e4;
    --accent:  #6254d6;
    --accent2: #1fa87a;
    --text:    #1a1d27;
    --muted:   #6b7080;
    --danger:  #d94f4f;
  }
}

body {
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

header {
  width: 100%;
  padding: 24px 0 16px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
  position: relative;
}
header h1 { font-size: 1.7rem; font-weight: 700; letter-spacing: -0.5px; }
header p  { color: var(--muted); margin-top: 4px; font-size: 0.9rem; }

/* Theme toggle button */
#theme-toggle {
  position: absolute;
  top: 50%;
  right: 20px;
  transform: translateY(-50%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0;
  transition: color 0.15s, border-color 0.15s;
}
#theme-toggle:hover { color: var(--text); border-color: var(--accent); }

main {
  width: 100%;
  max-width: 560px;
  padding: 0 16px 64px;
}

/* Tabs */
.tabs {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 24px;
}
.tab {
  flex: 1;
  padding: 12px;
  background: var(--surface);
  border: none;
  color: var(--muted);
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.tab:first-child { border-right: 1px solid var(--border); }
.tab.active {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}

/* Panels / Steps */
.panel { display: flex; flex-direction: column; gap: 16px; }
.panel.hidden { display: none; }
.step { display: flex; flex-direction: column; gap: 12px; }
.step.hidden { display: none; }
.step h2 { font-size: 1.1rem; font-weight: 600; }

/* Inputs */
input[type="text"], input[type="file"] {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 12px 14px;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s;
}
input[type="text"]:focus { border-color: var(--accent); }
input[type="file"] { cursor: pointer; }
input[type="file"]::-webkit-file-upload-button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 0.85rem;
}

/* Buttons */
button {
  padding: 12px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s, background 0.15s;
}
button:hover:not(:disabled) { opacity: 0.85; }
button:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary  { background: var(--accent);  color: #fff; }
.btn-success  { background: var(--accent2); color: #0f1117; }
.btn-danger   { background: var(--danger);  color: #fff; }
.btn-ghost    { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.btn-row { display: flex; gap: 10px; }
.btn-row button { flex: 1; }

/* Code display */
.code-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-family: 'Fira Mono', 'Consolas', monospace;
  font-size: 1.1rem;
  letter-spacing: 0.03em;
  color: var(--accent2);
  word-break: break-all;
  user-select: all;
}

/* Shareable link */
.link-box-wrap { margin-top: 4px; }
.wormhole-link {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-family: 'Fira Mono', 'Consolas', monospace;
  font-size: 0.8rem;
  color: var(--accent);
  word-break: break-all;
  text-decoration: none;
}
.wormhole-link:hover { text-decoration: underline; }

/* Progress */
.progress-track {
  width: 100%;
  height: 8px;
  background: var(--surface);
  border-radius: 99px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 99px;
  transition: width 0.3s;
  width: 0%;
}

/* Status text */
.status { color: var(--muted); font-size: 0.9rem; min-height: 20px; }
.status.error { color: var(--danger); }
.status.ok    { color: var(--accent2); }
.status.warn  { color: #f0a030; }

/* QR code */
.qr-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
}
.qr-code {
  background: #fff;
  padding: 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  line-height: 0;
}
.qr-code svg {
  display: block;
  width: 200px;
  height: 200px;
}
.hidden { display: none !important; }

/* Spinner */
.spinner {
  width: 32px; height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Nym init banner */
#nym-init-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 0.9rem;
  color: var(--muted);
}

/* Card wrapper */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* Done */
.done-icon { font-size: 2.5rem; text-align: center; }

/* ── Mixnet status card ──────────────────────────────────────────────────── */

.mixnet-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.mixnet-card.hidden { display: none; }

/* Header row */
.mixnet-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
}
.conn-gateway {
  margin-left: auto;
  font-family: monospace;
  font-size: 0.72rem;
  color: var(--muted);
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Connection dot */
.conn-dot {
  flex-shrink: 0;
  width: 9px; height: 9px;
  border-radius: 50%;
}
.conn-dot.connecting {
  background: #f0a030;
  animation: pulse-amber 1.1s ease-in-out infinite;
}
.conn-dot.connected {
  background: var(--accent2);
  animation: pulse-green 2.2s ease-in-out infinite;
}
.conn-dot.error { background: var(--danger); }

@keyframes pulse-amber {
  0%, 100% { box-shadow: 0 0 0 0 rgba(240,160,48,.5); }
  50%       { box-shadow: 0 0 0 5px rgba(240,160,48,0); }
}
@keyframes pulse-green {
  0%, 100% { box-shadow: 0 0 0 0 rgba(90,216,166,.45); }
  50%       { box-shadow: 0 0 0 6px rgba(90,216,166,0); }
}

/* Path visualization */
.mixnet-viz {
  display: flex;
  align-items: center;
  gap: 6px;
}
.node-label {
  font-size: 0.72rem;
  color: var(--muted);
  white-space: nowrap;
  min-width: 26px;
}
.mix-path {
  flex: 1;
  position: relative;
  height: 22px;
}
.mix-line {
  position: absolute;
  top: 50%; left: 0; right: 0;
  height: 1px;
  background: var(--border);
  transform: translateY(-50%);
}

/* Mixnet hop nodes */
.mix-node {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--surface);
  border: 1.5px solid var(--border);
  transition: border-color .4s, background .4s;
  z-index: 1;
}
.mixnet-card.connected .mix-node {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 18%, var(--surface));
  animation: node-idle 3s ease-in-out infinite;
}
.mixnet-card.connected .mix-node:nth-child(2) { animation-delay: 1s;  }
.mixnet-card.connected .mix-node:nth-child(3) { animation-delay: 2s;  }
@keyframes node-idle {
  0%, 100% { box-shadow: none; }
  50%       { box-shadow: 0 0 5px 1px color-mix(in srgb, var(--accent) 50%, transparent); }
}

/* Packet lane */
#pkt-lane {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 2;
}
.pkt {
  position: absolute;
  top: 50%;
  width: 7px; height: 7px;
  border-radius: 50%;
  transform: translateY(-50%);
  opacity: 0;
}
.pkt.out {
  background: var(--accent);
  box-shadow: 0 0 6px 1px var(--accent);
  animation: pkt-out 1.8s cubic-bezier(.4,0,.6,1) forwards;
}
.pkt.in {
  background: var(--accent2);
  box-shadow: 0 0 6px 1px var(--accent2);
  animation: pkt-in 1.8s cubic-bezier(.4,0,.6,1) forwards;
}
/* Cover / dummy traffic — muted colour, slower, lower peak opacity */
.pkt.out.cover {
  background: var(--muted);
  box-shadow: 0 0 4px 1px var(--muted);
  animation: pkt-out-cover 2.4s cubic-bezier(.4,0,.6,1) forwards;
}
.pkt.in.cover {
  background: var(--muted);
  box-shadow: 0 0 4px 1px var(--muted);
  animation: pkt-in-cover 2.4s cubic-bezier(.4,0,.6,1) forwards;
}
@keyframes pkt-out-cover {
  0%   { left: 0%;    opacity: 0; }
  4%   { opacity: 0.45; }
  20%  { left: 22%;   transform: translateY(-50%) scale(1);   }
  26%  { left: 25%;   transform: translateY(-50%) scale(1.5); }
  32%  { left: 28%;   transform: translateY(-50%) scale(1);   }
  45%  { left: 47%;   transform: translateY(-50%) scale(1);   }
  51%  { left: 50%;   transform: translateY(-50%) scale(1.5); }
  57%  { left: 53%;   transform: translateY(-50%) scale(1);   }
  68%  { left: 72%;   transform: translateY(-50%) scale(1);   }
  74%  { left: 75%;   transform: translateY(-50%) scale(1.5); }
  80%  { left: 78%;   transform: translateY(-50%) scale(1);   }
  96%  { left: 100%;  opacity: 0.45; }
  100% { left: 100%;  opacity: 0; }
}
@keyframes pkt-in-cover {
  0%   { left: 100%;  opacity: 0; }
  4%   { opacity: 0.45; }
  20%  { left: 78%;   transform: translateY(-50%) scale(1);   }
  26%  { left: 75%;   transform: translateY(-50%) scale(1.5); }
  32%  { left: 72%;   transform: translateY(-50%) scale(1);   }
  45%  { left: 53%;   transform: translateY(-50%) scale(1);   }
  51%  { left: 50%;   transform: translateY(-50%) scale(1.5); }
  57%  { left: 47%;   transform: translateY(-50%) scale(1);   }
  68%  { left: 28%;   transform: translateY(-50%) scale(1);   }
  74%  { left: 25%;   transform: translateY(-50%) scale(1.5); }
  80%  { left: 22%;   transform: translateY(-50%) scale(1);   }
  96%  { left: 0%;    opacity: 0.45; }
  100% { left: 0%;    opacity: 0; }
}
/* Packets pass through 3 mix nodes at ~25 %, 50 %, 75 % and briefly scale up */
@keyframes pkt-out {
  0%   { left: 0%;    opacity: 0; }
  4%   { opacity: 1; }
  20%  { left: 22%;   transform: translateY(-50%) scale(1);   }
  26%  { left: 25%;   transform: translateY(-50%) scale(1.8); }
  32%  { left: 28%;   transform: translateY(-50%) scale(1);   }
  45%  { left: 47%;   transform: translateY(-50%) scale(1);   }
  51%  { left: 50%;   transform: translateY(-50%) scale(1.8); }
  57%  { left: 53%;   transform: translateY(-50%) scale(1);   }
  68%  { left: 72%;   transform: translateY(-50%) scale(1);   }
  74%  { left: 75%;   transform: translateY(-50%) scale(1.8); }
  80%  { left: 78%;   transform: translateY(-50%) scale(1);   }
  96%  { left: 100%;  opacity: 1; }
  100% { left: 100%;  opacity: 0; }
}
@keyframes pkt-in {
  0%   { left: 100%;  opacity: 0; }
  4%   { opacity: 1; }
  20%  { left: 78%;   transform: translateY(-50%) scale(1);   }
  26%  { left: 75%;   transform: translateY(-50%) scale(1.8); }
  32%  { left: 72%;   transform: translateY(-50%) scale(1);   }
  45%  { left: 53%;   transform: translateY(-50%) scale(1);   }
  51%  { left: 50%;   transform: translateY(-50%) scale(1.8); }
  57%  { left: 47%;   transform: translateY(-50%) scale(1);   }
  68%  { left: 28%;   transform: translateY(-50%) scale(1);   }
  74%  { left: 25%;   transform: translateY(-50%) scale(1.8); }
  80%  { left: 22%;   transform: translateY(-50%) scale(1);   }
  96%  { left: 0%;    opacity: 1; }
  100% { left: 0%;    opacity: 0; }
}

/* Footer stats */
.mixnet-footer {
  display: flex;
  gap: 20px;
  font-size: 0.78rem;
}
.pkt-count        { font-variant-numeric: tabular-nums; }
.pkt-out          { color: var(--accent);  }
.pkt-in           { color: var(--accent2); }
.pkt-cover-label  { color: var(--muted);   }

/* Footer */
footer {
  width: 100%;
  text-align: center;
  padding: 24px 0 32px;
  font-size: 0.8rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  margin-top: 48px;
}
footer a { color: var(--muted); text-underline-offset: 3px; }
footer a:hover { color: var(--text); }