/* ══════════════════════════════════════════════════════
   ESP Flasher App — Dark Red Premium UI
   ══════════════════════════════════════════════════════ */

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

.skip-link {
  position: absolute; top: -1000px; left: 16px; z-index: 9999;
  padding: 8px 16px; background: var(--red); color: #fff;
  font-size: 14px; font-weight: 600; border-radius: 0 0 6px 6px; text-decoration: none;
}
.skip-link:focus { top: 0; }

:root {
  /* Core palette (Embedr Deep Dark) */
  --bg-base:      #000000;
  --bg-surface:   #09090b;
  --bg-card:      #111113;
  --bg-card2:     #161619;
  --bg-input:     #050505;
  --bg-hover:     #1d1d20;

  /* Red accent (Embedr Rose) */
  --red:          #e11d48;
  --red-bright:   #f43f5e;
  --red-dim:      #be123c;
  --red-glow:     rgba(244, 63, 94, 0.3);
  --red-glow-sm:  rgba(244, 63, 94, 0.12);
  --red-glow-xs:  rgba(244, 63, 94, 0.06);

  /* Text */
  --text-primary:   #ececec;
  --text-secondary: #888888;
  --text-muted:     #444444;

  /* Borders */
  --border:        rgba(255, 255, 255, 0.08);
  --border-med:    rgba(255, 255, 255, 0.12);
  --border-red:    rgba(244, 63, 94, 0.3);
  --border-red-hi: rgba(244, 63, 94, 0.55);

  /* Status */
  --success:      #22c55e;
  --success-glow: rgba(34, 197, 94, 0.2);
  --warning:      #f59e0b;
  --danger:       #ef4444;
  --info:         #3b82f6;

  /* Radius */
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 18px;

  /* Typography */
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;

  /* Motion */
  --t: 0.18s cubic-bezier(0.4, 0, 0.2, 1);

  /* Console */
  --console-bg: #070707;
}

/* ─── Light Theme ──────────────────────────────────── */
[data-theme="light"] {
  --bg-base:      #f5f7fa;
  --bg-surface:   #ffffff;
  --bg-card:      #ffffff;
  --bg-card2:     #f0f2f5;
  --bg-input:     #eef0f4;
  --bg-hover:     #e4e7ed;

  --red:          #e11d48;
  --red-bright:   #be123c;
  --red-dim:      #9f1239;
  --red-glow:     rgba(225, 29, 72, 0.2);
  --red-glow-sm:  rgba(225, 29, 72, 0.08);
  --red-glow-xs:  rgba(225, 29, 72, 0.04);

  --text-primary:   #0f172a;
  --text-secondary: #475569;
  --text-muted:     #94a3b8;

  --border:        rgba(0, 0, 0, 0.08);
  --border-med:    rgba(0, 0, 0, 0.12);
  --border-red:    rgba(225, 29, 72, 0.25);
  --border-red-hi: rgba(225, 29, 72, 0.45);

  --success:      #16a34a;
  --success-glow: rgba(22, 163, 74, 0.15);
  --warning:      #d97706;
  --danger:       #dc2626;
  --info:         #2563eb;

  --console-bg: #f8fafc;
}

[data-theme="light"] body::before {
  background-image:
    linear-gradient(rgba(225, 29, 72, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(225, 29, 72, 0.03) 1px, transparent 1px);
  mask-image: radial-gradient(circle at 50% 30%, black, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, black, transparent 80%);
}

[data-theme="light"] body::after {
  box-shadow: inset 20vw 0 150px -100px rgba(225, 29, 72, 0.03),
              inset -20vw 0 150px -100px rgba(225, 29, 72, 0.03);
}

[data-theme="light"] .brand-logo {
  background: var(--red-glow-xs);
}

[data-theme="light"] .serial-output {
  color: #059669;
}

[data-theme="light"] #cursor-glow {
  background: radial-gradient(circle, rgba(225, 29, 72, 0.05) 0%, transparent 60%);
}

html { scroll-behavior: smooth; font-size: 14px; }

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font);
  line-height: 1.6;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  color-scheme: dark;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
}

/* ── Global Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.15); }
/* Mouse Spotlight Hover Effect */
#cursor-glow {
  position: fixed;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(225, 29, 72, 0.08) 0%, transparent 60%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  transition: opacity 0.4s ease;
  opacity: 0;
}
.animated {
  animation: fadeUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  opacity: 0;
  transform: translateY(10px);
}
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* Embedr Ultra-fine Grid */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(225, 29, 72, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(225, 29, 72, 0.08) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(circle at 50% 30%, black, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, black, transparent 80%);
}

/* Ambient Teal/Ice Blue Edge Glows */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  box-shadow: inset 20vw 0 150px -100px rgba(225, 29, 72, 0.05), 
              inset -20vw 0 150px -100px rgba(225, 29, 72, 0.05),
              inset 0 -20vh 150px -100px rgba(225, 29, 72, 0.04);
  pointer-events: none;
  z-index: 0;
}

/* ── Layout ── */
.app-wrap {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 100%;
}



/* ── Header ── */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0 18px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
  position: relative;
  flex-shrink: 0;
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100px;
  height: 1px;
  background: linear-gradient(90deg, var(--red), transparent);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.brand-logo {
  width: 42px;
  height: 42px;
  background: var(--red-glow-xs);
  border: 1px solid var(--border-red);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.brand-logo::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(225, 29, 72,0.15), transparent 60%);
}

.brand-logo img {
  width: 28px;
  height: 28px;
  position: relative;
}

.brand-logo .logo-svg {
  width: 26px;
  height: 26px;
  color: var(--red-bright);
  position: relative;
}

.brand-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.4px;
  line-height: 1.2;
}

.brand-sub {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.1px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ws-badge {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 11px;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 99px;
  padding: 6px 14px;
  font-weight: 500;
  transition: border-color var(--t);
}

.ws-badge.ready { border-color: rgba(34,197,94,0.25); }

.ws-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--warning);
  flex-shrink: 0;
  transition: background var(--t);
}

.ws-dot.ok  { background: var(--success); box-shadow: 0 0 5px var(--success-glow); }
.ws-dot.err { background: var(--danger); }

/* ── Alert ── */
#webserial-warning {
  display: none;
  align-items: flex-start;
  gap: 12px;
  background: rgba(225, 29, 72,0.06);
  border: 1px solid rgba(225, 29, 72,0.2);
  border-radius: var(--r-lg);
  padding: 14px 18px;
  color: #fca5a5;
  font-size: 13px;
  margin-bottom: 20px;
  line-height: 1.5;
}

#webserial-warning i { font-size: 15px; margin-top: 1px; flex-shrink: 0; }

/* ── Embedr Pill Tab Nav ── */
.tab-nav {
  display: flex;
  gap: 4px;
  background: rgba(255,255,255,0.03) !important;
  border: 1px solid rgba(255,255,255,0.05) !important;
  border-radius: 99px;
  padding: 4px !important;
  width: fit-content;
  max-width: 100%;
  position: relative;
  overflow: hidden;
}

.tab-nav::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(100px circle at var(--mouse-x, 0px) var(--mouse-y, 0px), rgba(225, 29, 72, 0.25), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 0;
}

.tab-nav:hover::before {
  opacity: 1;
}

.tab-nav::-webkit-scrollbar { display: none; }

.tab-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  border-radius: 99px;
  cursor: pointer;
  transition: all var(--t);
  white-space: nowrap;
  letter-spacing: -0.1px;
  position: relative;
  z-index: 1;
}

.tab-btn i { font-size: 13px; }

.tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.04);
}

.tab-btn.active {
  color: #fff;
  background: var(--red);
  box-shadow: 0 2px 10px var(--red-glow);
}

.tab-panel { display: none; flex: 1; min-height: 0; flex-direction: column; overflow: hidden; }
.tab-panel.active { display: flex; }
.tab-panel.scrollable-tab.active { overflow-y: auto; padding-right: 4px; padding-bottom: 24px; display: block; }

/* ── Main Grid ── */
.main-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 400px;
  gap: 18px;
  align-items: stretch;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.col-left, .col-right {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow-y: auto;
  padding-right: 4px;
  padding-bottom: 20px;
}
.col-right {
  overflow: hidden;
}

@media (max-width: 960px) {
  .main-grid { grid-template-columns: 1fr; }
}

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 18px;
  margin-bottom: 14px;
  transition: border-color var(--t), box-shadow var(--t);
  position: relative;
  flex-shrink: 0;
}

.card:last-child { margin-bottom: 0; }

.card:has(.custom-select.open) {
  z-index: 50;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.04), transparent);
}

.card:hover { border-color: var(--border-med); }

.card-active {
  border-color: var(--border-red) !important;
  box-shadow: 0 0 0 1px var(--red-glow-sm);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.card-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 14px;
}

.ci-red    { background: rgba(225, 29, 72,0.1);  color: var(--red-bright); border: 1px solid rgba(225, 29, 72,0.18); }
.ci-green  { background: rgba(34,197,94,0.08); color: #4ade80; border: 1px solid rgba(34,197,94,0.18); }
.ci-blue   { background: rgba(59,130,246,0.08);color: #60a5fa; border: 1px solid rgba(59,130,246,0.18); }
.ci-amber  { background: rgba(245,158,11,0.08);color: #fbbf24; border: 1px solid rgba(245,158,11,0.18); }
.ci-purple { background: rgba(139,92,246,0.08);color: #a78bfa; border: 1px solid rgba(139,92,246,0.18); }

.card-title    { font-size: 13px; font-weight: 600; color: var(--text-primary); letter-spacing: -0.2px; }
.card-subtitle { font-size: 11px; color: var(--text-muted); margin-top: 1px; }

/* ── Form controls ── */
.field-label {
  display: block;
  font-size: 10.5px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.7px;
  margin-bottom: 7px;
}

/* ── Custom Select Dropdown ── */
.custom-select {
  position: relative;
  width: 100%;
  font-family: var(--font);
  font-size: 13px;
  outline: none;
}

.custom-select-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--t);
  user-select: none;
}

.custom-select:focus .custom-select-trigger,
.custom-select-trigger:hover,
.custom-select.open .custom-select-trigger {
  border-color: var(--border-red);
}

.custom-select-trigger i {
  color: var(--text-muted);
  font-size: 11px;
  transition: transform var(--t);
}

.custom-select.open .custom-select-trigger i {
  transform: rotate(180deg);
}

.custom-select-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: #0f0f0f;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-med);
  border-radius: var(--r-sm);
  box-shadow: 0 10px 30px rgba(0,0,0,0.8);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-5px);
  transition: all var(--t);
  z-index: 100;
  overflow: hidden;
}

.custom-select.open .custom-select-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.custom-select-options {
  max-height: 200px;
  overflow-y: auto;
  padding: 4px;
}

.custom-option {
  padding: 10px 12px;
  border-radius: 4px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.1s;
}

.custom-option:hover:not(.disabled) {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.custom-option.selected {
  background: var(--red-glow-xs);
  color: var(--red-bright);
}

.custom-option.disabled {
  color: var(--text-muted);
  cursor: not-allowed;
  font-style: italic;
}

input[type="text"], input[type="number"], input[type="search"] {
  padding: 9px 11px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 13px;
  outline: none;
  transition: border-color var(--t);
  width: 100%;
}
input:hover, input:focus { border-color: var(--border-red); }
input::placeholder { color: var(--text-muted); }
input[type="url"] { padding: 9px 11px; background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--r-sm); color: var(--text-primary); font-family: var(--mono); font-size: 12px; outline: none; transition: border-color var(--t); width: 100%; }
input[type="url"]:hover, input[type="url"]:focus { border-color: var(--border-red); }
input[type="url"]::placeholder { color: var(--text-muted); }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 14px;
}
.form-row:last-child { margin-bottom: 0; }
.form-group { margin-bottom: 14px; }
.form-group:last-child { margin-bottom: 0; }

/* ── Mode Switch ── */
.mode-switch {
  display: flex;
  gap: 4px;
  background: rgba(255,255,255,0.03) !important;
  border: 1px solid rgba(255,255,255,0.05) !important;
  border-radius: 99px;
  padding: 4px !important;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}

.mode-switch::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(100px circle at var(--mouse-x, 0px) var(--mouse-y, 0px), rgba(225, 29, 72, 0.25), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 0;
}

.mode-switch:hover::before {
  opacity: 1;
}

.mode-btn {
  flex: 1;
  padding: 8px 12px;
  background: transparent;
  border: none;
  border-radius: 99px;
  font-family: var(--font);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--t);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  position: relative;
  z-index: 1;
}

.mode-btn i { font-size: 12px; }

.mode-btn.active {
  background: var(--red);
  color: #fff;
  box-shadow: 0 1px 8px var(--red-glow-sm);
}

.mode-btn:not(.active):hover { color: var(--text-primary); background: var(--bg-hover); }

/* ── Chip Badge ── */
.chip-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 11px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  font-family: var(--mono);
  width: 100%;
  height: 38px;
  transition: all var(--t);
}

.chip-badge.detected {
  color: var(--red-bright);
  border-color: var(--border-red);
  background: rgba(225, 29, 72,0.05);
}

/* ── Theme Toggle ── */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--t);
  font-size: 14px;
  flex-shrink: 0;
}
.theme-toggle:hover {
  color: var(--text-primary);
  border-color: var(--border-red);
}

/* ── Language Selector ── */
.lang-select {
  position: relative;
}
.lang-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 11px;
  cursor: pointer;
  transition: all var(--t);
}
.lang-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-med);
}
.lang-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-med);
  border-radius: var(--r-sm);
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: all var(--t);
  z-index: 100;
  min-width: 120px;
}
.lang-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.lang-option {
  padding: 8px 14px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.1s;
  white-space: nowrap;
}
.lang-option:hover { background: var(--bg-hover); color: var(--text-primary); }
.lang-option.active { color: var(--red-bright); }

/* ── Drag Handle ── */
.drag-handle {
  cursor: grab;
  color: var(--text-muted);
  font-size: 12px;
  padding: 0 6px;
  user-select: none;
  touch-action: none;
}
.drag-handle:active { cursor: grabbing; }
.drag-handle i { pointer-events: none; }
.upload-part-row.dragging { opacity: 0.4; }
.upload-part-row.drag-over { border-top: 2px solid var(--red-bright); }

/* ── Keyboard Shortcuts Modal ── */
.shortcut-overlay {
  position: fixed;
  inset: 0;
  z-index: 99998;
  background: rgba(0,0,0,0.6);
  display: none;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}
.shortcut-overlay.open { display: flex; }
.shortcut-modal {
  background: var(--bg-card);
  border: 1px solid var(--border-med);
  border-radius: var(--r-lg);
  padding: 24px 28px;
  max-width: 420px;
  width: 90%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.shortcut-modal h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.shortcut-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
}
.shortcut-row:last-child { border-bottom: none; }
.shortcut-row span:first-child { color: var(--text-secondary); }
.shortcut-row span:last-child {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--red-bright);
  background: var(--red-glow-xs);
  padding: 2px 8px;
  border-radius: var(--r-xs);
  border: 1px solid var(--border-red);
}
.shortcut-close {
  display: block;
  margin: 16px auto 0;
  padding: 8px 20px;
  border: none;
  border-radius: var(--r-sm);
  background: var(--red);
  color: #fff;
  font-family: var(--font);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
}


/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 18px;
  border-radius: var(--r-md);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all var(--t);
  white-space: nowrap;
  text-decoration: none;
  letter-spacing: -0.1px;
  position: relative;
  overflow: hidden;
}

.btn i { font-size: 13px; }

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--t);
}

.btn:hover::after { background: rgba(255,255,255,0.04); }

.btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: linear-gradient(180deg, var(--red-bright), var(--red));
  color: #fff;
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 4px 14px var(--red-glow), inset 0 1px 0 rgba(255,255,255,0.2);
}
.btn-primary:hover {
  background: linear-gradient(180deg, #fb7185, var(--red-bright));
  box-shadow: 0 6px 20px var(--red-glow), inset 0 1px 0 rgba(255,255,255,0.25);
  transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px var(--red-glow); }

.btn-secondary {
  background: var(--bg-hover);
  color: var(--text-secondary);
  border: 1px solid var(--border-med);
}
.btn-secondary:hover { 
  color: #fff; 
  border-color: var(--border-red); 
  box-shadow: 0 4px 14px var(--red-glow-xs); 
}

.btn-danger {
  background: rgba(225, 29, 72,0.08);
  color: #fca5a5;
  border: 1px solid rgba(225, 29, 72,0.2);
}
.btn-danger:hover { background: rgba(225, 29, 72,0.15); }

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-med);
}
.btn-outline:hover { 
  color: #fff; 
  border-color: var(--border-red); 
  background: rgba(225, 29, 72, 0.04);
  box-shadow: 0 4px 14px var(--red-glow-xs);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: none;
  padding: 8px 10px;
}
.btn-ghost:hover { color: var(--text-primary); }

.btn-full { width: 100%; }
.btn-sm   { padding: 6px 12px; font-size: 12px; }
.btn-xs   { padding: 4px 9px; font-size: 11px; }

.btn-group { display: flex; gap: 8px; }
.btn-group .btn { flex: 1; }

/* ── Icon Button ── */
.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--t);
  flex-shrink: 0;
}

.icon-btn i { font-size: 12px; }

.icon-btn:hover {
  color: #fff;
  border-color: var(--border-red);
  background: rgba(225, 29, 72, 0.06);
  box-shadow: 0 4px 12px var(--red-glow-xs);
}

/* ── Connection Status ── */
.conn-status {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 13px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  margin-bottom: 12px;
  transition: all var(--t);
}

.conn-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
  transition: all var(--t);
  position: relative;
}

.conn-dot.disconnected { background: var(--text-muted); }

.conn-dot.connected {
  background: var(--success);
  box-shadow: 0 0 8px var(--success-glow);
}

.conn-dot.flashing {
  background: var(--red-bright);
  box-shadow: 0 0 10px var(--red-glow);
  animation: pulse-dot 0.7s ease-in-out infinite alternate;
}

@keyframes pulse-dot { from { opacity: 0.4; } to { opacity: 1; } }

.conn-text { font-size: 12px; color: var(--text-secondary); flex: 1; }
.conn-text strong { color: var(--text-primary); }

/* ── Progress ── */
#progress-section { display: none; margin-top: 16px; }

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

.progress-label { font-size: 12px; color: var(--text-secondary); }
.progress-pct   { font-size: 12px; font-weight: 700; color: var(--red-bright); font-family: var(--mono); }

.progress-track {
  height: 6px;
  background: rgba(255,255,255,0.04);
  border-radius: 99px;
  overflow: hidden;
  border: 1px solid var(--border);
  position: relative;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--red-dim) 0%, var(--red-bright) 100%);
  border-radius: 99px;
  width: 0%;
  transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  box-shadow: 0 0 10px var(--red-glow);
}

.progress-bar::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: #fff;
  border-radius: 50%;
  opacity: 0.7;
}

.file-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.file-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-family: var(--mono);
  padding: 3px 8px;
  border-radius: var(--r-xs);
  border: 1px solid transparent;
  transition: all var(--t);
}

.file-badge i { font-size: 10px; }

.file-badge.pending { background: rgba(255,255,255,0.03); color: var(--text-muted); border-color: var(--border); }
.file-badge.active  { background: rgba(245,158,11,0.1); color: #fbbf24; border-color: rgba(245,158,11,0.25); animation: pulse-dot 0.5s ease infinite alternate; }
.file-badge.done    { background: rgba(34,197,94,0.07); color: #4ade80; border-color: rgba(34,197,94,0.2); }
.file-badge.error   { background: rgba(225, 29, 72,0.07); color: #fca5a5; border-color: rgba(225, 29, 72,0.2); }

/* ── Log Console ── */
.log-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.log-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
  flex-wrap: wrap;
  gap: 8px;
}

.log-toolbar-left  { display: flex; align-items: center; gap: 8px; }
.log-toolbar-right { display: flex; gap: 5px; align-items: center; }

.log-search-wrap {
  position: relative;
  margin: 8px 0 0;
}

.log-search-wrap i {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 11px;
  pointer-events: none;
}

#log-search {
  width: 100%;
  padding: 6px 10px 6px 28px;
  font-size: 11.5px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-secondary);
}

#log-search:focus { border-color: var(--border-red); }

.log-console {
  overflow-y: auto;
  overflow-x: hidden;
  padding: 10px 0 2px;
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.65;
  flex: 1;
  min-height: 0;
}

.log-console::-webkit-scrollbar { width: 3px; }
.log-console::-webkit-scrollbar-track { background: transparent; }
.log-console::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 2px; }

.log-line {
  display: flex;
  gap: 10px;
  padding: 1px 0;
  border-radius: 2px;
  transition: background 0.1s;
}

.log-line:hover { background: rgba(255,255,255,0.025); }
.log-line.highlighted { background: rgba(225, 29, 72,0.1) !important; }

.log-time {
  color: var(--text-muted);
  flex-shrink: 0;
  font-size: 10.5px;
  padding-top: 1px;
  min-width: 64px;
  user-select: none;
}

.log-text { word-break: break-all; white-space: pre-wrap; }
.log-text.info    { color: #7a8ba0; }
.log-text.success { color: #4ade80; }
.log-text.warn    { color: #fbbf24; }
.log-text.error   { color: #fca5a5; }
.log-text.accent  { color: var(--red-bright); font-weight: 500; }
.log-text.dim     { color: #3d4d5a; }

mark.log-match {
  background: rgba(225, 29, 72,0.35);
  color: #fff;
  border-radius: 2px;
}

.log-count {
  font-size: 10px;
  color: var(--text-muted);
  font-family: var(--mono);
  padding: 6px 0 0;
  text-align: right;
}

/* ── Upload Zone ── */
.upload-zone {
  border: 2px dashed var(--border-med);
  border-radius: var(--r-lg);
  padding: 26px 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--t);
  position: relative;
}

.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--border-red);
  background: var(--red-glow-xs);
}

.upload-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.upload-icon {
  width: 42px;
  height: 42px;
  background: var(--red-glow-xs);
  border: 1px solid var(--border-red);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
  color: var(--red);
  font-size: 18px;
}

.upload-title { font-size: 13px; font-weight: 500; color: var(--text-primary); margin-bottom: 4px; }
.upload-sub   { font-size: 12px; color: var(--text-muted); }

/* ── Partition Table ── */
.ptable {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
  margin-top: 4px;
}

.ptable th {
  text-align: left;
  color: var(--text-muted);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 0 0 8px;
  border-bottom: 1px solid var(--border);
}

.ptable td {
  padding: 8px 6px 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.035);
  color: var(--text-secondary);
  vertical-align: middle;
}

.ptable tr:last-child td { border-bottom: none; }

.addr-badge {
  font-family: var(--mono);
  font-size: 11px;
  background: rgba(225, 29, 72,0.07);
  color: var(--red-bright);
  padding: 2px 7px;
  border-radius: var(--r-xs);
  border: 1px solid rgba(225, 29, 72,0.15);
  display: inline-block;
}

/* ── Divider ── */
.divider { height: 1px; background: var(--border); margin: 14px 0; }

/* ── Info rows ── */
.info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.035);
  font-size: 12px;
  gap: 12px;
}
.info-row:last-child { border-bottom: none; }
.info-label { color: var(--text-muted); flex-shrink: 0; }
.info-value { color: var(--text-secondary); font-family: var(--mono); font-size: 11px; text-align: right; }
.info-value.hi { color: var(--red-bright); }

/* ── Serial Monitor ── */
.serial-wrap {
  background: var(--console-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.serial-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-card2);
  flex-wrap: wrap;
  gap: 8px;
}

.serial-bar-left  { display: flex; align-items: center; gap: 8px; }
.serial-bar-right { display: flex; align-items: center; gap: 8px; }

.serial-status {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--mono);
}

.serial-status.open { color: var(--success); }

.serial-output {
  padding: 10px 14px;
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.7;
  color: #5fb990;
  height: 320px;
  overflow-y: auto;
  overflow-x: hidden;
  white-space: pre-wrap;
  word-break: break-all;
}

.serial-output::-webkit-scrollbar { width: 4px; }
.serial-output::-webkit-scrollbar-track { background: transparent; }
.serial-output::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.07); border-radius: 2px; }

.serial-line { display: block; line-height: 1.7; }
.serial-line.sent { color: #7a9ec4; }
.serial-line.sys  { color: #3d4d5a; }

.serial-input-row {
  display: flex;
  gap: 8px;
  padding: 8px 12px;
  border-top: 1px solid var(--border);
  background: var(--bg-card2);
}

.serial-input {
  flex: 1;
  padding: 7px 10px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-primary);
  font-family: var(--mono);
  font-size: 12px;
  outline: none;
  transition: border-color var(--t);
}
.serial-input:focus { border-color: var(--border-red); }
.serial-input::placeholder { color: var(--text-muted); }

/* ── Toast ── */
#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 9999;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 11px 15px;
  border-radius: var(--r-md);
  font-size: 13px;
  font-weight: 500;
  max-width: 320px;
  pointer-events: all;
  animation: toast-in 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
  transition: opacity 0.25s ease;
  border: 1px solid;
}

@keyframes toast-in {
  from { transform: translateX(20px) scale(0.95); opacity: 0; }
  to   { transform: translateX(0) scale(1); opacity: 1; }
}

.toast i { font-size: 13px; flex-shrink: 0; }
.toast.success { background: rgba(34,197,94,0.08);  border-color: rgba(34,197,94,0.2);  color: #4ade80; }
.toast.error   { background: rgba(225, 29, 72,0.08);  border-color: rgba(225, 29, 72,0.2);  color: #fca5a5; }
.toast.warning { background: rgba(245,158,11,0.08); border-color: rgba(245,158,11,0.2); color: #fbbf24; }
.toast.info    { background: rgba(59,130,246,0.08); border-color: rgba(59,130,246,0.2); color: #93c5fd; }

/* ── Guide page ── */
.page-hero {
  margin-bottom: 28px;
}

.section-tag {
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--red);
  margin-bottom: 8px;
  display: block;
}

.page-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.8px;
  margin-bottom: 8px;
  line-height: 1.25;
}

.page-sub {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.6;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 28px;
}

@media (max-width: 760px) { .steps-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 440px) { .steps-grid { grid-template-columns: 1fr; } }

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 18px;
  position: relative;
  overflow: hidden;
  transition: border-color var(--t), transform var(--t);
}

.step-card:hover {
  border-color: var(--border-red);
  transform: translateY(-2px);
}

.step-num {
  font-size: 30px;
  font-weight: 700;
  color: rgba(225, 29, 72,0.12);
  font-family: var(--mono);
  line-height: 1;
  margin-bottom: 10px;
  letter-spacing: -2px;
}

.step-icon {
  width: 32px;
  height: 32px;
  background: var(--red-glow-xs);
  border: 1px solid var(--border-red);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
  color: var(--red-bright);
  font-size: 14px;
}

.step-title { font-size: 13px; font-weight: 600; color: var(--text-primary); margin-bottom: 5px; }
.step-desc  { font-size: 12px; color: var(--text-muted); line-height: 1.5; }

.chip-grid  { display: flex; flex-wrap: wrap; gap: 7px; }

.chip-pill {
  padding: 5px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 99px;
  font-size: 12px;
  font-family: var(--mono);
  color: var(--text-secondary);
  transition: all var(--t);
  cursor: default;
}

.chip-pill:hover {
  border-color: var(--border-red);
  color: var(--red-bright);
  background: var(--red-glow-xs);
}

.faq-list { padding: 4px 0; }
.faq-item { border-bottom: 1px solid var(--border); padding: 14px 16px; cursor: pointer; }
.faq-item:last-child { border-bottom: none; }
.faq-q { font-size: 13px; font-weight: 600; color: var(--text-primary); display: flex; align-items: center; gap: 8px; }
.faq-q i { font-size: 10px; color: var(--red); transition: transform var(--t); }
.faq-item.open .faq-q i { transform: rotate(90deg); }
.faq-a { display: none; font-size: 12px; color: var(--text-secondary); line-height: 1.7; margin-top: 10px; padding-left: 18px; }
.faq-item.open .faq-a { display: block; }

/* Driver download section */
.driver-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

@media (max-width: 640px) { .driver-grid { grid-template-columns: 1fr; } }

.driver-card {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 14px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  transition: border-color var(--t);
  text-decoration: none;
}

.driver-card:hover { border-color: var(--border-red); }

.driver-icon {
  width: 36px;
  height: 36px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--red-bright);
  flex-shrink: 0;
}

.driver-name { font-size: 12px; font-weight: 600; color: var(--text-primary); margin-bottom: 2px; }
.driver-sub  { font-size: 11px; color: var(--text-muted); }

/* About section */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 640px) { .about-grid { grid-template-columns: 1fr; } }

.about-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.75;
}

.about-text strong { color: var(--text-primary); }

.about-text p { margin-bottom: 12px; }
.about-text p:last-child { margin-bottom: 0; }

/* Troubleshoot fix pills */
.fix-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(34,197,94,0.06);
  border: 1px solid rgba(34,197,94,0.15);
  color: #4ade80;
  font-size: 11px;
  padding: 3px 8px;
  border-radius: var(--r-xs);
  margin-top: 4px;
  font-family: var(--mono);
}

.fix-pill i { font-size: 10px; }

.trouble-row {
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.trouble-row:last-child { border-bottom: none; }
.trouble-title { font-size: 12px; font-weight: 600; color: var(--text-primary); margin-bottom: 3px; display: flex; align-items: center; gap: 8px; }
.trouble-desc  { font-size: 12px; color: var(--text-muted); margin-bottom: 5px; line-height: 1.5; }

/* ── Footer ── */
.site-footer {
  margin-top: 20px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-text  { font-size: 12px; color: var(--text-muted); }
.footer-links { display: flex; gap: 18px; }
.footer-link  { font-size: 12px; color: var(--text-muted); text-decoration: none; transition: color var(--t); }
.footer-link:hover { color: var(--red-bright); }

/* ── Responsive ── */
@media (max-width: 640px) {
  .app-wrap { padding: 0 14px 60px; }
  .tab-btn  { padding: 8px 14px; font-size: 12px; }
  .btn-group { flex-direction: column; }
  .form-row { grid-template-columns: 1fr; }
  .site-header { flex-wrap: wrap; gap: 10px; }
  .site-footer { flex-direction: column; }
  .log-console { height: 280px; }
  .serial-output { height: 220px; }
}

/* ── Scrollbar global ── */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.07); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.14); }
::selection { background: rgba(225, 29, 72,0.28); color: #fff; }
.hidden { display: none !important; }

/* ── Splash Intro Overlay ── */
#splash-overlay {
  position: fixed;
  inset: 0;
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at 50% 40%, rgba(225,29,72,0.06) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 80%, rgba(225,29,72,0.03) 0%, transparent 50%),
              radial-gradient(ellipse at 20% 90%, rgba(225,29,72,0.04) 0%, transparent 50%),
              #000;
  opacity: 0;
  transition: opacity 0.6s ease;
  pointer-events: none;
}
#splash-overlay::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 30%, rgba(244,63,94,0.03) 0%, transparent 50%),
              radial-gradient(ellipse at 30% 70%, rgba(225,29,72,0.02) 0%, transparent 50%);
  animation: splash-bg-drift 8s ease-in-out infinite alternate;
  pointer-events: none;
}
@keyframes splash-bg-drift {
  0% { transform: translate(0, 0) scale(1); opacity: 0.5; }
  100% { transform: translate(30px, -20px) scale(1.1); opacity: 1; }
}
#splash-overlay.splash-hidden {
  display: none;
}
#splash-overlay.splash-visible {
  opacity: 1;
  pointer-events: all;
}
#splash-overlay.splash-slide-up {
  opacity: 0;
  transform: translateY(-40px) scale(0.98);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.splash-content {
  text-align: center;
  max-width: 480px;
  padding: 40px;
}

.splash-logo {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  background: var(--red-glow-xs);
  border: 1px solid var(--border-red);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
}
.splash-logo::before {
  content: '';
  position: absolute;
  inset: -8px;
  border-radius: 26px;
  border: 1px solid var(--red-glow);
  opacity: 0;
  animation: logo-pulse 2s ease-in-out infinite;
}
.splash-logo.anim-in::before {
  opacity: 1;
}
.splash-logo img {
  width: 52px;
  height: 52px;
  position: relative;
  z-index: 1;
}
.splash-logo.anim-in {
  opacity: 1;
  transform: scale(1);
}

@keyframes logo-pulse {
  0%, 100% { transform: scale(1); opacity: 0.4; }
  50% { transform: scale(1.12); opacity: 0.1; }
}

.splash-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.8px;
  margin-bottom: 6px;
  opacity: 0;
  transform: translateY(16px);
  transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.splash-title.anim-in {
  opacity: 1;
  transform: translateY(0);
}

.splash-tagline {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 28px;
  min-height: 1.4em;
  position: relative;
}
.splash-tagline::after {
  content: '|';
  position: absolute;
  color: var(--red-dim);
  font-weight: 300;
  animation: cursor-blink 0.8s step-end infinite;
}
.splash-tagline.done::after {
  display: none;
}
@keyframes cursor-blink {
  50% { opacity: 0; }
}

.splash-ready {
  font-size: 11px;
  color: var(--success);
  margin-top: 16px;
  min-height: 1.4em;
  opacity: 0;
  transform: translateY(6px);
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  font-weight: 500;
  letter-spacing: 0.5px;
}
.splash-ready.anim-in {
  opacity: 1;
  transform: translateY(0);
}

.splash-counter {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.splash-counter.anim-in {
  opacity: 1;
  transform: translateY(0);
}

.splash-icon {
  font-size: 22px;
  color: var(--red-bright);
}
.splash-icon i { font-size: 22px; }

.splash-count {
  font-size: 36px;
  font-weight: 800;
  color: var(--red-bright);
  font-family: var(--mono);
  letter-spacing: -2px;
  line-height: 1;
  min-width: 80px;
  text-align: right;
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  text-shadow: 0 0 20px var(--red-glow);
}
.splash-count.celebrate {
  color: #fff;
  text-shadow: 0 0 40px var(--red-bright), 0 0 80px var(--red-glow);
  transform: scale(1.15);
}

.splash-label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.splash-progress-track {
  width: 200px;
  height: 3px;
  background: rgba(255,255,255,0.06);
  border-radius: 99px;
  margin: 20px auto 0;
  overflow: hidden;
  position: relative;
}

.splash-progress-bar {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--red-dim), var(--red-bright), #fff, var(--red-bright), var(--red-dim));
  background-size: 200% 100%;
  border-radius: 99px;
  box-shadow: 0 0 8px var(--red-glow);
  animation: bar-shimmer 2s linear infinite;
}

@keyframes bar-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── Flash Counter Badge ── */
.stat-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 99px;
  padding: 6px 14px;
  font-weight: 500;
  white-space: nowrap;
  transition: border-color var(--t);
}
.stat-badge i { font-size: 11px; color: var(--red-bright); }
.stat-badge:hover { border-color: var(--border-med); }

/* ── Retry Button ── */
.btn-warning {
  background: rgba(245,158,11,0.1);
  color: #fbbf24;
  border: 1px solid rgba(245,158,11,0.25);
}
.btn-warning:hover {
  background: rgba(245,158,11,0.18);
  border-color: rgba(245,158,11,0.4);
  box-shadow: 0 4px 14px rgba(245,158,11,0.15);
  transform: translateY(-1px);
}
.btn-warning:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  pointer-events: none;
}

/* ── Flash Summary ── */
#flash-summary {
  border-top: 1px solid var(--border);
  padding-top: 4px;
}
.summary-meta {
  margin-bottom: 12px;
}
.summary-files {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.summary-file-row {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 10px 12px;
  transition: border-color var(--t);
}
.summary-file-row:hover {
  border-color: var(--border-med);
}
.summary-file-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}
.summary-file-num {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-muted);
  background: var(--bg-input);
  padding: 1px 5px;
  border-radius: 3px;
  flex-shrink: 0;
}
.summary-file-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-primary);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.summary-file-status {
  font-size: 12px;
  flex-shrink: 0;
}
.summary-file-details {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 11px;
  color: var(--text-muted);
}
.summary-detail strong {
  color: var(--text-secondary);
  font-family: var(--mono);
  font-weight: 500;
}
.summary-md5 {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-muted);
  background: var(--bg-input);
  padding: 1px 5px;
  border-radius: 3px;
  user-select: all;
}
/* ── Drag-over highlight ── */
#drop-zone.drag-over {
  border-color: var(--red-bright) !important;
  background: rgba(255, 62, 62, 0.08) !important;
  box-shadow: 0 0 24px rgba(255, 62, 62, 0.15);
  transform: scale(1.01);
  transition: all 0.15s ease;
}

/* ── Notify toggle ── */
.notify-toggle:hover { color: var(--text) !important; }

/* ── RTL overrides ── */
html[dir="rtl"] .header-right { flex-direction: row-reverse; }
html[dir="rtl"] .lang-select .lang-dropdown { left: auto; right: 0; }
html[dir="rtl"] .lang-select .lang-btn .fa-caret-down { margin-left: 0; margin-right: 4px; }
html[dir="rtl"] .fa-arrow-left::before { content: "\f061"; }
html[dir="rtl"] .fa-arrow-right::before { content: "\f060"; }
html[dir="rtl"] .log-time { margin-right: 0; margin-left: 8px; }
html[dir="rtl"] .fa-caret-down { margin-left: 0; margin-right: 2px; }
html[dir="rtl"] .tab-btn i { margin-right: 0; margin-left: 6px; }
html[dir="rtl"] .fa-chevron-right::before { content: "\f053"; }
html[dir="rtl"] .fa-chevron-left::before { content: "\f054"; }

.btn-copy-md5 {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 1px 6px;
  border: none;
  border-radius: 3px;
  background: transparent;
  color: var(--text-muted);
  font-size: 10px;
  cursor: pointer;
  transition: all var(--t);
  margin-left: 4px;
}
.btn-copy-md5:hover { color: var(--red-bright); }
.btn-copy-md5.copied { color: var(--success); }

/* ── File info card ── */
.file-info {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 10px 14px;
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
}
.file-info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.file-info-label { color: var(--text-muted); white-space: nowrap; }
.file-info-value {
  color: var(--text-primary);
  font-family: var(--mono);
  font-size: 11px;
  text-align: right;
  word-break: break-all;
}
.file-info-hash {
  font-size: 10px;
  user-select: all;
  cursor: pointer;
}
.file-info-hash:hover { color: var(--red-bright); }
.file-info-suggest {
  font-size: 10px;
  color: var(--success);
  margin-top: 2px;
}

/* ── Quick firmware buttons ── */
.fw-quick-btns { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.quick-fw-btn { font-size: 11px !important; padding: 4px 10px !important; }
.quick-fw-btn i { margin-right: 4px; }
.quick-fw-btn:disabled { opacity: 0.5; pointer-events: none; }
.quick-fw-btn.cached { border-color: var(--success) !important; color: var(--success) !important; }
.quick-fw-btn.cached i { color: var(--success); }

.fw-cache-clear { font-size: 10px; color: var(--text-muted); cursor: pointer; background: none; border: none; padding: 2px 4px; text-decoration: underline; text-underline-offset: 2px; }
.fw-cache-clear:hover { color: var(--red-bright); }

.fw-url-row { display: flex; align-items: flex-end; gap: 8px; margin-top: 10px; }
.fw-url-row .field-label { margin-bottom: 6px; }
#fw-url-input { font-family: var(--mono); font-size: 12px; }

/* ── Overlay (shared) ── */
.overlay {
  position: fixed; inset: 0; z-index: 10000;
  background: rgba(0,0,0,0.65);
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(3px);
}

/* ── Diagnostics modal ── */
.diag-modal, .boot-modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px 32px;
  max-width: 520px;
  width: 90%;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
  animation: modalIn 0.25s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(20px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.diag-close {
  position: absolute; top: 12px; right: 16px;
  background: none; border: none;
  color: var(--text-muted); font-size: 22px;
  cursor: pointer; line-height: 1;
}
.diag-close:hover { color: var(--text); }
.diag-modal h3, .boot-modal h3 {
  margin-bottom: 20px;
  font-size: 16px;
  display: flex; align-items: center; gap: 8px;
}
.diag-steps { display: flex; flex-direction: column; gap: 16px; margin-bottom: 20px; }
.diag-step {
  display: flex; gap: 14px;
  padding: 12px 14px;
  background: var(--bg-body);
  border-radius: var(--r-sm);
  border-left: 3px solid var(--red-dim);
}
.diag-step-num {
  width: 24px; height: 24px; flex-shrink: 0;
  background: var(--red-dim); color: #fff;
  border-radius: 50%; display: flex;
  align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700;
}
.diag-step-body { font-size: 12px; color: var(--text-secondary); line-height: 1.5; }
.diag-step-body strong { color: var(--text-primary); font-size: 13px; }
.diag-step-body p { margin-top: 4px; }
.diag-chips { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
.diag-chips span {
  background: var(--bg-input); padding: 2px 8px;
  border-radius: 3px; font-size: 10px; color: var(--text-muted);
  font-family: var(--mono);
}

/* ── Boot helper modal ── */
.boot-animation {
  display: flex; flex-direction: column; gap: 16px;
  margin-bottom: 20px;
}
.boot-board {
  position: relative;
  width: 220px; height: 120px;
  margin: 0 auto;
  background: var(--bg-body);
  border: 2px solid var(--border);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
}
.boot-chip {
  background: var(--bg-input);
  padding: 4px 14px;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--text-primary);
}
.boot-pin {
  position: absolute;
  font-size: 9px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 3px;
  background: var(--bg-input);
  color: var(--text-muted);
}
.boot-pin-en { top: -10px; left: 16px; color: var(--danger); }
.boot-pin-boot { bottom: -10px; right: 16px; color: var(--warning); }
.boot-led {
  position: absolute; top: -10px; right: 16px;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--danger);
  transition: background 0.3s;
}
.boot-led-off { background: var(--text-muted); opacity: 0.4; }
.boot-led-on { background: #00ff88; opacity: 1; box-shadow: 0 0 8px #00ff8844; }
.boot-steps-text ol {
  padding-left: 20px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.8;
}
.boot-steps-text li { margin-bottom: 4px; }
.boot-highlight {
  background: var(--red-dim); color: #fff;
  padding: 1px 6px; border-radius: 3px;
  font-size: 11px; font-weight: 600;
}