/* ───────────────────────────────────────────
   Reset & tokens
─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:           #0f1117;
  --surface:      #1a1d27;
  --surface-2:    #23263a;
  --border:       #2e3250;
  --accent:       #4f8ef7;
  --accent-hover: #6ba3ff;
  --danger:       #e05252;
  --success:      #3ecf8e;
  --warning:      #f5a623;
  --text:         #e2e4f0;
  --text-muted:   #7880a0;
  --radius:       10px;
  --mono:         'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 2rem 1rem 4rem;
}

/* ───────────────────────────────────────────
   Layout
─────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 640px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

header {
  text-align: center;
  padding: 1.5rem 0 0.5rem;
}

header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

header .subtitle {
  color: var(--text-muted);
  margin-top: 0.4rem;
  font-size: 0.9rem;
}

header .subtitle code {
  font-family: var(--mono);
  background: var(--surface-2);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 0.85em;
}

/* ───────────────────────────────────────────
   Steps
─────────────────────────────────────────── */
.step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.step-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.step-number {
  background: var(--accent);
  color: #fff;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}

.step-header h2 {
  font-size: 1rem;
  font-weight: 600;
}

/* ───────────────────────────────────────────
   Version picker
─────────────────────────────────────────── */
.field-row {
  display: flex;
  gap: 0.5rem;
}

select {
  flex: 1;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.55rem 0.85rem;
  font-size: 0.9rem;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237880a0' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  padding-right: 2rem;
}

select:disabled { opacity: 0.5; cursor: not-allowed; }
select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.icon-btn {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  width: 38px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  flex-shrink: 0;
}

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

/* Release meta */
.release-meta {
  display: flex;
  gap: 1.25rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  align-items: center;
}

.release-meta a { color: var(--accent); text-decoration: none; }
.release-meta a:hover { text-decoration: underline; }

/* Release body / description */
.release-body {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  background: var(--surface-2);
  border-left: 3px solid var(--border);
  border-radius: 0 6px 6px 0;
  padding: 0.6rem 0.9rem;
  white-space: pre-wrap;
}

/* Asset / variant list */
.asset-list .label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

#asset-options {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Variant cards */
.variant-card {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.variant-card:hover { border-color: color-mix(in srgb, var(--accent) 50%, transparent); }
.variant-card:has(input:checked) {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 7%, var(--surface-2));
}

.variant-card input[type="radio"] {
  accent-color: var(--accent);
  margin-top: 3px;
  flex-shrink: 0;
}

.variant-card-body { flex: 1; min-width: 0; }

.variant-card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.variant-label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
}

.variant-badge {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 1px 7px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 20%, transparent);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
}

.variant-size {
  margin-left: auto;
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.variant-desc {
  margin-top: 0.3rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.no-assets-msg {
  color: var(--danger);
  font-size: 0.85rem;
}

/* ───────────────────────────────────────────
   Installed version readback
─────────────────────────────────────────── */
.installed-version {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.83rem;
  padding: 0.5rem 0.75rem;
  background: color-mix(in srgb, var(--success) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--success) 35%, transparent);
  border-radius: 8px;
}

.installed-version .label { color: var(--text-muted); }

.version-tag {
  font-family: var(--mono);
  color: var(--success);
  font-weight: 600;
}

.version-hash {
  font-family: var(--mono);
  color: var(--text-muted);
  font-size: 0.78rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 160px;
}

/* ───────────────────────────────────────────
   Connect & Flash
─────────────────────────────────────────── */
.browser-warning {
  background: color-mix(in srgb, var(--warning) 15%, transparent);
  border: 1px solid var(--warning);
  border-radius: 8px;
  padding: 0.65rem 1rem;
  font-size: 0.88rem;
  color: var(--warning);
}

.connect-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 0.6rem 1.2rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}

button:hover:not(:disabled) { background: var(--accent-hover); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-flash {
  background: var(--success);
  font-size: 1rem;
  padding: 0.75rem;
  width: 100%;
  letter-spacing: 0.3px;
}

.btn-flash:hover:not(:disabled) { background: color-mix(in srgb, var(--success) 85%, #fff); }

/* Status badge */
.status-badge {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.status-disconnected { background: color-mix(in srgb, var(--danger) 18%, transparent); color: var(--danger); }
.status-connected    { background: color-mix(in srgb, var(--success) 18%, transparent); color: var(--success); }
.status-busy         { background: color-mix(in srgb, var(--warning) 18%, transparent); color: var(--warning); }

/* ───────────────────────────────────────────
   Progress & log
─────────────────────────────────────────── */
.progress-bar-wrap {
  height: 6px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--success));
  border-radius: 999px;
  transition: width 0.3s ease;
}

.log {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  min-height: 80px;
  max-height: 260px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
  line-height: 1.55;
}

.log .log-ok    { color: var(--success); }
.log .log-err   { color: var(--danger); }
.log .log-warn  { color: var(--warning); }
.log .log-info  { color: var(--accent); }

/* ───────────────────────────────────────────
   Footer
─────────────────────────────────────────── */
footer {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

footer a { color: var(--text-muted); }
footer a:hover { color: var(--accent); }

/* ───────────────────────────────────────────
   Utilities
─────────────────────────────────────────── */
.hidden { display: none !important; }