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

:root {
  --bg:         #0a0a0f;
  --bg2:        #111118;
  --bg3:        #1a1a24;
  --border:     #2a2a3a;
  --border2:    #3a3a50;
  --accent:     #ff6a00;
  --accent2:    #ff9a40;
  --accent-dim: rgba(255,106,0,0.12);
  --green:      #00e5a0;
  --green-dim:  rgba(0,229,160,0.1);
  --red:        #ff4060;
  --red-dim:    rgba(255,64,96,0.1);
  --blue:       #4090ff;
  --text:       #e8e8f0;
  --text2:      #9090a8;
  --text3:      #505068;
  --font-mono:  'JetBrains Mono', monospace;
  --font-ui:    'Syne', sans-serif;
  --radius:     8px;
  --radius-lg:  14px;
  --shadow:     0 4px 24px rgba(0,0,0,0.5);
}

html { font-size: 14px; }

body {
  font-family: var(--font-ui);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ─── Background ───────────────────────────────────────────── */
.bg-grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,106,0,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,106,0,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.bg-glow {
  position: fixed; top: -200px; left: 50%; transform: translateX(-50%);
  width: 800px; height: 400px; z-index: 0; pointer-events: none;
  background: radial-gradient(ellipse, rgba(255,106,0,0.06) 0%, transparent 70%);
}

/* ─── App Layout ───────────────────────────────────────────── */
.app {
  position: relative; z-index: 1;
  max-width: 1200px; margin: 0 auto;
  padding: 0 20px 40px;
  display: flex; flex-direction: column; gap: 0;
}

/* ─── Header ───────────────────────────────────────────────── */
.header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 0 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}

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

.logo-icon {
  width: 40px; height: 40px;
  color: var(--accent);
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-ui);
  font-size: 1.3rem; font-weight: 400;
  color: var(--text2);
  display: block; line-height: 1.2;
}

.logo-text strong {
  color: var(--text); font-weight: 800; letter-spacing: -0.5px;
}

.logo-sub {
  font-family: var(--font-mono);
  font-size: 0.72rem; color: var(--text3);
  display: block; margin-top: 2px;
}

.header-badges { display: flex; gap: 8px; flex-wrap: wrap; }

.badge {
  font-family: var(--font-mono); font-size: 0.7rem;
  padding: 4px 10px; border-radius: 20px;
  border: 1px solid var(--border2);
  color: var(--text3); background: var(--bg2);
}

/* ─── Browser Warning ──────────────────────────────────────── */
.browser-warning {
  background: rgba(255,64,96,0.08);
  border: 1px solid var(--red);
  color: var(--red);
  padding: 14px 18px; border-radius: var(--radius);
  font-family: var(--font-mono); font-size: 0.85rem;
  margin-bottom: 24px; line-height: 1.5;
}

/* ─── Main grid ─────────────────────────────────────────────── */
.main {
}
summary::before {
  content: "▶";
  font-size: 12px;
  transition: transform 0.2s;
}

details[open] summary::before {
  transform: rotate(90deg);
}

@media (max-width: 900px) {
  .main { grid-template-columns: 1fr; }
}

/* ─── Panels ────────────────────────────────────────────────── */
.panel {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 1em;
}

.panel-config { display: flex; flex-direction: column; gap: 0; }
.panel-flash  { display: flex; flex-direction: column; gap: 0; }

/* ─── Steps ─────────────────────────────────────────────────── */
.step {
  display: flex; gap: 0;
  border-bottom: 1px solid var(--border);
}
.step:last-child { border-bottom: none; }

.step-num {
  font-family: var(--font-mono); font-size: 0.7rem;
  font-weight: 700; color: var(--accent);
  writing-mode: vertical-rl; text-orientation: mixed;
  padding: 20px 12px;
  background: var(--accent-dim);
  border-right: 1px solid var(--border);
  letter-spacing: 2px; min-width: 38px;
  display: flex; align-items: center; justify-content: center;
}

.step-body {
  flex: 1; padding: 20px;
  display: flex; flex-direction: column; gap: 14px;
}

.step-title {
  font-size: 0.8rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--text2);
}

/* ─── Board Grid ────────────────────────────────────────────── */
.board-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px;
}

.board-card {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 10px 12px;
  cursor: pointer; transition: all 0.15s ease;
  display: flex; flex-direction: column; gap: 3px;
}

.board-card:hover {
  border-color: var(--border2);
  background: #1e1e2e;
}

.board-card.selected {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.board-card-name {
  font-weight: 700; font-size: 0.8rem; color: var(--text);
}

.board-card-chip {
  font-family: var(--font-mono); font-size: 0.68rem; color: var(--accent);
}

.board-card-desc {
  font-size: 0.68rem; color: var(--text3); line-height: 1.3;
}

/* ─── Form Fields ───────────────────────────────────────────── */
.field-row {
  display: flex; align-items: center; gap: 12px;
}

.field-row label {
  font-size: 0.78rem; color: var(--text2);
  min-width: 110px; flex-shrink: 0;
}

.field-row select,
.field-row input[type="text"] {
  flex: 1;
  background: var(--bg3); border: 1px solid var(--border);
  color: var(--text); border-radius: var(--radius);
  padding: 7px 10px;
  font-family: var(--font-mono); font-size: 0.8rem;
  outline: none; transition: border-color 0.15s;
  appearance: none; -webkit-appearance: none;
  cursor: pointer;
}

.field-row select:hover,
.field-row input:hover { border-color: var(--border2); }
.field-row select:focus,
.field-row input:focus { border-color: var(--accent); }

/* ─── Checkboxes ────────────────────────────────────────────── */
.checkbox-row { display: flex; }

.checkbox-label {
  display: flex; align-items: center; gap: 10px;
  cursor: pointer; font-size: 0.82rem; color: var(--text2);
  user-select: none;
}
.checkbox-label.small { font-size: 0.75rem; }

.checkbox-label input[type="checkbox"] { display: none; }

.checkmark {
  width: 16px; height: 16px; border-radius: 4px; flex-shrink: 0;
  border: 1px solid var(--border2); background: var(--bg3);
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s;
}

.checkbox-label input:checked + .checkmark {
  background: var(--accent); border-color: var(--accent);
}

.checkbox-label input:checked + .checkmark::after {
  content: '✓'; font-size: 10px; color: white; font-weight: 700;
}

/* ─── Dropzone ──────────────────────────────────────────────── */
.dropzone {
  border: 2px dashed var(--border2);
  border-radius: var(--radius-lg); padding: 30px 20px;
  text-align: center; cursor: pointer;
  transition: all 0.2s ease;
  background: var(--bg3);
}

.dropzone:hover, .dropzone.drag-over {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.dropzone-icon svg {
  width: 36px; height: 36px; color: var(--text3);
  margin-bottom: 10px;
  transition: color 0.2s;
}

.dropzone:hover .dropzone-icon svg { color: var(--accent); }

.dropzone-text {
  font-size: 0.85rem; color: var(--text2); margin-bottom: 4px;
}

.dropzone-text code {
  font-family: var(--font-mono); color: var(--accent); font-size: 0.85rem;
}

.dropzone-sub { font-size: 0.78rem; color: var(--text3); }

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

/* ─── File Info ─────────────────────────────────────────────── */
.file-info {
  display: flex; align-items: center; gap: 12px;
  background: var(--green-dim); border: 1px solid var(--green);
  border-radius: var(--radius); padding: 12px 14px;
}

.file-info-icon { font-size: 1.4rem; }

.file-info-details {
  flex: 1; display: flex; flex-direction: column; gap: 2px;
}

.file-name {
  font-family: var(--font-mono); font-size: 0.82rem;
  color: var(--text); word-break: break-all;
}

.file-size { font-size: 0.72rem; color: var(--text3); }

.clear-btn {
  background: none; border: none; cursor: pointer;
  color: var(--text3); font-size: 1rem; padding: 4px;
  border-radius: 4px; transition: color 0.15s;
}
.clear-btn:hover { color: var(--red); }

/* ─── Multi-file ────────────────────────────────────────────── */
.add-file-btn {
  background: none; border: 1px dashed var(--border2);
  color: var(--text3); font-family: var(--font-mono);
  font-size: 0.75rem; padding: 8px 14px;
  border-radius: var(--radius); cursor: pointer; width: 100%;
  transition: all 0.15s; margin-top: 4px;
}
.add-file-btn:hover { border-color: var(--accent); color: var(--accent); }

.extra-file-row {
  display: flex; gap: 8px; align-items: center; margin-top: 8px;
}
.extra-file-row input[type="text"] {
  width: 90px;
  background: var(--bg3); border: 1px solid var(--border);
  color: var(--text); border-radius: var(--radius);
  padding: 6px 8px; font-family: var(--font-mono); font-size: 0.78rem; outline: none;
}
.extra-file-row label {
  flex: 1; font-family: var(--font-mono); font-size: 0.75rem;
  color: var(--text2); cursor: pointer;
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 6px 10px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* ─── Action Area ───────────────────────────────────────────── */
.action-area {
  padding: 20px;
  border-bottom: 1px solid var(--border);
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
}

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: var(--radius);
  font-family: var(--font-ui); font-size: 0.85rem; font-weight: 700;
  border: none; cursor: pointer; transition: all 0.15s;
  letter-spacing: 0.3px;
}
.btn svg { width: 15px; height: 15px; flex-shrink: 0; }

.btn:disabled { opacity: 0.35; cursor: not-allowed; }

.btn-connect {
  background: var(--accent); color: #fff;
}
.btn-connect:hover:not(:disabled) {
  background: var(--accent2);
  box-shadow: 0 0 20px rgba(255,106,0,0.4);
}

.btn-flash {
  background: var(--green); color: #000;
}
.btn-flash:hover:not(:disabled) {
  background: #00ffb3;
  box-shadow: 0 0 20px rgba(0,229,160,0.4);
}

.btn-erase {
  background: var(--red-dim); color: var(--red);
  border: 1px solid var(--red);
}
.btn-erase:hover:not(:disabled) { background: rgba(255,64,96,0.2); }

.btn-reset {
  background: var(--bg3); color: var(--text2);
  border: 1px solid var(--border);
}
.btn-reset:hover:not(:disabled) { border-color: var(--border2); color: var(--text); }

.btn-sm {
  background: var(--bg3); border: 1px solid var(--border);
  color: var(--text2); font-family: var(--font-mono);
  font-size: 0.72rem; padding: 5px 10px; border-radius: 5px;
  cursor: pointer; transition: all 0.15s;
}
.btn-sm:hover { border-color: var(--border2); color: var(--text); }

/* ─── Port Info ─────────────────────────────────────────────── */
.port-info {
  display: flex; align-items: center; gap: 8px;
  background: var(--green-dim); border: 1px solid var(--green);
  border-radius: var(--radius); padding: 8px 14px;
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--green);
}

.port-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ─── Progress ──────────────────────────────────────────────── */
.progress-area {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.progress-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 8px;
}

.progress-label {
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--text2);
}

.progress-pct {
  font-family: var(--font-mono); font-size: 0.8rem;
  color: var(--accent); font-weight: 700;
}

.progress-track {
  height: 8px; background: var(--bg3);
  border-radius: 4px; border: 1px solid var(--border);
  overflow: hidden;
}

.progress-bar {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 4px;
  transition: width 0.3s ease;
  box-shadow: 0 0 10px rgba(255,106,0,0.5);
}

.progress-meta {
  margin-top: 6px;
  font-family: var(--font-mono); font-size: 0.72rem; color: var(--text3);
}

/* ─── Console ───────────────────────────────────────────────── */
.console-area {
  display: flex; flex-direction: column;
  border-bottom: 1px solid var(--border);
}

.console-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg3);
  border-bottom: 1px solid var(--border);
}

.console-title {
  font-size: 0.75rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--text3);
}

.console-controls {
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
}

.console-controls select {
  background: var(--bg3); border: 1px solid var(--border);
  color: var(--text2); border-radius: 5px;
  padding: 4px 8px; font-family: var(--font-mono); font-size: 0.72rem;
  outline: none; cursor: pointer;
}

.console-output {
  font-family: var(--font-mono); font-size: 0.78rem; line-height: 1.6;
  padding: 12px 14px;
  height: 260px; overflow-y: auto;
  background: var(--bg);
  color: var(--text);
  word-break: break-all;
}

.console-output::-webkit-scrollbar { width: 6px; }
.console-output::-webkit-scrollbar-track { background: var(--bg); }
.console-output::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

.console-line { padding: 1px 0; }
.console-line.dim { color: var(--text3); }
.console-line.info { color: var(--blue); }
.console-line.success { color: var(--green); }
.console-line.error { color: var(--red); }
.console-line.warn { color: var(--accent); }
.console-line.rx { color: var(--text); }
.console-line.tx { color: var(--accent2); }

.console-line .ts {
  color: var(--text3); margin-right: 8px; font-size: 0.72rem;
}

/* ─── Console Input ─────────────────────────────────────────── */
.console-input-row {
  display: flex; gap: 6px; padding: 8px 14px;
  background: var(--bg2); border-top: 1px solid var(--border);
}

#consoleInput {
  flex: 1;
  background: var(--bg3); border: 1px solid var(--border);
  color: var(--text); border-radius: var(--radius);
  padding: 7px 10px; font-family: var(--font-mono); font-size: 0.8rem;
  outline: none; transition: border-color 0.15s;
}
#consoleInput:focus { border-color: var(--accent); }
#consoleInput:disabled { opacity: 0.4; }

#lineEnding {
  background: var(--bg3); border: 1px solid var(--border);
  color: var(--text2); border-radius: var(--radius);
  padding: 6px 8px; font-family: var(--font-mono); font-size: 0.75rem;
  outline: none; cursor: pointer;
}

.send-btn { background: var(--accent); color: #fff; border-color: transparent; }
.send-btn:hover:not(:disabled) { background: var(--accent2); }

/* ─── Device Info ───────────────────────────────────────────── */
.device-info {
  padding: 18px 20px;
}

.device-info-title {
  font-size: 0.75rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--text3); margin-bottom: 12px;
}

.device-info-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.di-card {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 10px 12px;
}

.di-label {
  font-size: 0.68rem; color: var(--text3);
  text-transform: uppercase; letter-spacing: 1px;
  margin-bottom: 3px;
}

.di-value {
  font-family: var(--font-mono); font-size: 0.82rem;
  color: var(--text); font-weight: 600;
}

/* ─── Footer ────────────────────────────────────────────────── */
.footer {
  display: flex; justify-content: space-between;
  padding: 20px 0 0;
  border-top: 1px solid var(--border);
  font-size: 0.72rem; color: var(--text3);
  font-family: var(--font-mono);
  flex-wrap: wrap; gap: 8px;
}

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

/* ─── Scrollbar global ──────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 4px; }