/* ──────────────────────────────────────────────────────────────
   ESP32 Web Flasher  –  style.css
   ────────────────────────────────────────────────────────────── */
:root {
  --bg:          #0d1117;
  --surface:     #161b22;
  --surface2:    #21262d;
  --border:      #30363d;
  --accent:      #00c896;
  --accent-dim:  #00a07a;
  --danger:      #f85149;
  --warn:        #e3b341;
  --text:        #e6edf3;
  --text-muted:  #8b949e;
  --radius:      8px;
}

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

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

/* ── Header ─────────────────────────────────────────────────── */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--accent);
  text-decoration: none;
}

.logo svg { width: 28px; height: 28px; }

.header-badge {
  font-size: 11px;
  background: var(--accent);
  color: #000;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 600;
}

/* ── Layout ──────────────────────────────────────────────────── */
main {
  flex: 1;
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  padding: 32px 16px 64px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ── Cards ───────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.card-header {
  padding: 14px 20px;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-header h2 {
  font-size: 15px;
  font-weight: 600;
}

.step-badge {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent);
  color: #000;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-badge.done { background: #238636; color: #fff; }
.step-badge.locked { background: var(--border); color: var(--text-muted); }

.card-body { padding: 20px; }

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: opacity .15s, filter .15s;
  text-decoration: none;
}

.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn:not(:disabled):hover { filter: brightness(1.1); }

.btn-primary { background: var(--accent); color: #000; border-color: var(--accent); }
.btn-secondary { background: transparent; color: var(--text); border-color: var(--border); }
.btn-danger  { background: var(--danger); color: #fff; }
.btn-sm { padding: 5px 12px; font-size: 12px; }

/* ── Status indicator ────────────────────────────────────────── */
.status-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 6px;
  background: var(--surface2);
  border: 1px solid var(--border);
  font-size: 14px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.dot-idle    { background: var(--border); }
.dot-ok      { background: var(--accent); box-shadow: 0 0 6px var(--accent); }
.dot-error   { background: var(--danger); box-shadow: 0 0 6px var(--danger); }
.dot-loading { background: var(--warn);   animation: pulse 1s infinite; }

@keyframes pulse { 0%,100%{ opacity:1 } 50%{ opacity:.3 } }

/* ── Forms ───────────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.form-group label { font-size: 13px; color: var(--text-muted); }

input[type="text"],
input[type="file"],
select,
textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 14px;
  width: 100%;
  outline: none;
}

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

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 600px) { .form-grid { grid-template-columns: 1fr; } }

/* ── File drop zone ──────────────────────────────────────────── */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 6px;
  padding: 28px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  color: var(--text-muted);
  font-size: 14px;
}

.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent);
  background: rgba(0,200,150,.05);
}

.drop-zone input { display: none; }

.drop-zone .icon { font-size: 32px; margin-bottom: 8px; }

.drop-zone .file-selected {
  color: var(--accent);
  font-weight: 600;
  word-break: break-all;
}

/* ── Progress bar ────────────────────────────────────────────── */
.progress-wrap {
  background: var(--surface2);
  border-radius: 20px;
  height: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-dim));
  border-radius: 20px;
  width: 0%;
  transition: width .3s;
}

.progress-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
  display: flex;
  justify-content: space-between;
}

/* ── Serial monitor ──────────────────────────────────────────── */
#monitor {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  font-size: 12px;
  background: #0d1117;
  color: #58a6ff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
  height: 200px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
  line-height: 1.6;
}

#monitor .line-ok    { color: var(--accent); }
#monitor .line-err   { color: var(--danger); }
#monitor .line-warn  { color: var(--warn); }
#monitor .line-info  { color: var(--text-muted); }

/* ── Firmware list ───────────────────────────────────────────── */
.fw-list { display: flex; flex-direction: column; gap: 10px; }

.fw-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: border-color .15s;
}

.fw-item:hover   { border-color: var(--accent); }
.fw-item.selected { border-color: var(--accent); background: rgba(0,200,150,.08); }

.fw-item .fw-icon {
  font-size: 28px;
  flex-shrink: 0;
}

.fw-item .fw-info { flex: 1; overflow: hidden; }

.fw-item .fw-name {
  font-weight: 600;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.fw-item .fw-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.fw-item .fw-actions { display: flex; gap: 6px; flex-shrink: 0; }

.chip-badge {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 20px;
}

/* ── Alert banner ────────────────────────────────────────────── */
.alert {
  padding: 10px 16px;
  border-radius: 6px;
  font-size: 13px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.5;
}

.alert-info  { background: rgba(56,139,253,.1); border: 1px solid rgba(56,139,253,.3); }
.alert-warn  { background: rgba(227,179,65,.1);  border: 1px solid rgba(227,179,65,.3); }

/* ── esp-web-install-button override ────────────────────────── */
esp-web-install-button {
  display: block;
  margin-top: 14px;
}

esp-web-install-button[active] > button {
  background: var(--accent);
  color: #000;
  border: none;
  padding: 10px 22px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* ── Tabs ────────────────────────────────────────────────────── */
.tab-bar {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  background: var(--surface2);
}

.tab-btn {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color .15s;
  margin-bottom: -1px;
}

.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

.tab-panel { display: none; padding: 20px; }
.tab-panel.active { display: block; }

/* ── Empty state ─────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 32px;
  color: var(--text-muted);
}

.empty-state .icon { font-size: 40px; margin-bottom: 12px; }