/* ── Google Fonts ──────────────────────────────────────────────────────────── */
/* Syne (display), Space Mono (values), Outfit (body) — loaded in HTML */

/* ── Variables ─────────────────────────────────────────────────────────────── */
:root {
  --bg:          #09090b;
  --surface:     #111115;
  --surface-2:   #18181e;
  --border:      #26262e;
  --border-hi:   #3a3a46;
  --text:        #e2e2ea;
  --muted:       #64647a;
  --accent:      #f59e0b;
  --accent-glow: rgba(245,158,11,0.20);
  --accent-dim:  rgba(245,158,11,0.07);
  --success:     #4ade80;
  --danger:      #f87171;
  --radius:      14px;
  --radius-sm:   8px;
  --font-body:   'Outfit', sans-serif;
  --font-mono:   'Space Mono', monospace;
  --font-display:'Syne', sans-serif;
  --transition:  0.18s ease;
}

/* ── Reset ─────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { height: 100%; }
body {
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── App Shell ─────────────────────────────────────────────────────────────── */
.app {
  max-width: 600px;
  margin: 0 auto;
  padding: 52px 22px 88px;
}

/* ── Header ─────────────────────────────────────────────────────────────────── */
header {
  text-align: center;
  margin-bottom: 44px;
}
.logo {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  color: var(--text);
  line-height: 1;
}
.accent-dot { color: var(--accent); }
.tagline {
  margin-top: 8px;
  font-size: 0.875rem;
  color: var(--muted);
  font-weight: 300;
  letter-spacing: 0.06em;
}

/* ── Tabs ────────────────────────────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 3px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  padding: 4px;
  margin-bottom: 26px;
}
.tab {
  flex: 1;
  padding: 11px 12px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}
.tab.active {
  background: var(--surface-2);
  color: var(--text);
  box-shadow: 0 1px 6px rgba(0,0,0,0.5);
}
.tab:hover:not(.active) { color: var(--text); }
.tab:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ── Tab Panels ──────────────────────────────────────────────────────────────── */
.tab-panel { display: block; }
.tab-panel.hidden { display: none; }

/* ── Dropzone ─────────────────────────────────────────────────────────────────── */
.dropzone {
  border: 1.5px dashed var(--border-hi);
  border-radius: var(--radius);
  padding: 56px 28px 48px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  background: var(--surface);
  user-select: none;
}
.dropzone:hover,
.dropzone.drag-over {
  border-color: var(--accent);
  background: var(--accent-dim);
}
.dropzone:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.dz-icon {
  width: 44px;
  height: 44px;
  color: var(--muted);
  margin: 0 auto 18px;
  display: block;
}
.dz-title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 5px;
}
.dz-hint {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}
.dz-btns {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Buttons ─────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1;
}
.btn-accent {
  background: var(--accent);
  color: #1c1000;
}
.btn-accent:hover { background: #fbbf24; }
.btn-ghost {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--border-hi); background: #222230; }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Full-width analyze button */
.btn-analyze {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  margin-top: 14px;
  padding: 15px 20px;
  background: var(--accent);
  color: #1c1000;
  border: none;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-analyze:hover:not(:disabled) {
  background: #fbbf24;
  transform: translateY(-1px);
  box-shadow: 0 8px 28px var(--accent-glow);
}
.btn-analyze:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}
.btn-analyze.loading {
  background: var(--surface-2);
  color: var(--muted);
  border: 1px solid var(--border);
}
.btn-analyze:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Spinner */
@keyframes spin { to { transform: rotate(360deg); } }
.btn-spinner {
  width: 17px;
  height: 17px;
  border: 2.5px solid rgba(28,16,0,0.25);
  border-top-color: #1c1000;
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
  flex-shrink: 0;
}
.btn-analyze.loading .btn-spinner {
  border-color: rgba(255,255,255,0.15);
  border-top-color: var(--muted);
}

/* Gemini toggle */
.gemini-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 10px;
  cursor: pointer;
  user-select: none;
}
.gemini-toggle input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
  cursor: pointer;
}
.gemini-toggle .toggle-label {
  font-size: 0.8rem;
  color: var(--muted);
}

/* ── Preview Area ──────────────────────────────────────────────────────────── */
.preview-area {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
  line-height: 0;
}
.preview-area canvas,
.preview-area video {
  display: block;
  width: 100%;
  height: auto;
  border-radius: inherit;
}
.clear-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 30px;
  height: 30px;
  border: none;
  border-radius: 50%;
  background: rgba(0,0,0,0.72);
  color: rgba(255,255,255,0.8);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background var(--transition);
  z-index: 2;
  backdrop-filter: blur(4px);
}
.clear-btn svg { width: 12px; height: 12px; }
.clear-btn:hover { background: rgba(240,60,60,0.8); color: #fff; }
.camera-hint {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.72);
  color: rgba(255,255,255,0.75);
  font-size: 0.78rem;
  padding: 5px 14px;
  border-radius: 999px;
  backdrop-filter: blur(4px);
  white-space: nowrap;
  pointer-events: none;
}

/* ── Result Panel (image mode) ─────────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}
.result-panel {
  margin-top: 22px;
  padding: 28px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  animation: fadeUp 0.3s ease;
}
.rp-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}
.rp-value {
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 8vw, 3.4rem);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 16px;
}
.rp-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}
.chip {
  padding: 4px 13px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  font-size: 0.78rem;
  color: var(--muted);
  font-weight: 500;
}
.chip.tol { color: var(--accent); border-color: rgba(245,158,11,0.25); }

/* Band display in result */
.rp-bands-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}
.rp-bands {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.rp-band {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
}
.rp-swatch {
  width: 18px;
  height: 44px;
  border-radius: 5px;
  border: 1px solid rgba(255,255,255,0.1);
}
.rp-name {
  font-size: 0.68rem;
  color: var(--muted);
  text-align: center;
  max-width: 42px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.rp-confidence {
  margin-top: 14px;
  font-size: 0.78rem;
  color: var(--muted);
}
.conf-high   { color: var(--success); }
.conf-medium { color: var(--accent); }
.conf-low    { color: var(--danger); }

/* ── Error Panel ──────────────────────────────────────────────────────────── */
.error-panel {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 18px;
  padding: 15px 18px;
  background: rgba(248,113,113,0.07);
  border: 1px solid rgba(248,113,113,0.22);
  border-radius: var(--radius);
  color: var(--danger);
  font-size: 0.9rem;
  animation: fadeUp 0.25s ease;
}
.err-icon { width: 18px; height: 18px; flex-shrink: 0; margin-top: 2px; }

/* ── Manual Mode ──────────────────────────────────────────────────────────── */

/* Resistor SVG */
.res-wrap {
  padding: 20px 12px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  margin-bottom: 22px;
}
#resSvg {
  width: 100%;
  max-width: 320px;
  height: auto;
  display: inline-block;
}

/* Band count segmented control */
.band-count-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}
.bc-label {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 500;
}
.segmented {
  display: flex;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 2px;
}
.seg-btn {
  padding: 7px 18px;
  border: none;
  border-radius: calc(var(--radius-sm) - 2px);
  background: transparent;
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.seg-btn.active { background: var(--accent); color: #1c1000; }
.seg-btn:hover:not(.active) { color: var(--text); }

/* Band picker rows */
.band-row {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.band-row:last-child { border-bottom: none; }
.band-row-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}
.swatches {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.swatch-btn {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition);
  flex-shrink: 0;
  position: relative;
}
.swatch-btn:hover { transform: scale(1.18); }
.swatch-btn.sel {
  border-color: var(--text);
  box-shadow: 0 0 0 2px var(--bg);
}
/* White swatch gets a border so it's visible */
.swatch-btn[data-c="white"] { outline: 1px solid var(--border-hi); }
/* "None" swatch */
.swatch-btn.swatch-none {
  background: transparent !important;
  border: 2px dashed var(--border-hi);
  font-size: 9px;
  color: var(--muted);
  display: grid;
  place-items: center;
}
.swatch-btn.swatch-none.sel { border-color: var(--text); }

/* Manual result (inline, updates live) */
.manual-result {
  margin-top: 22px;
  padding: 20px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  animation: fadeUp 0.25s ease;
}
.mr-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  flex-shrink: 0;
}
.mr-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1;
}
.mr-meta {
  font-size: 0.85rem;
  color: var(--muted);
}

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

/* ── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 500px) {
  .app { padding: 36px 16px 64px; }
  .logo { font-size: 2.2rem; }
  .dropzone { padding: 40px 20px 36px; }
  .rp-value { font-size: 2.2rem; }
  .result-panel { padding: 20px 18px; }
  .tabs { gap: 2px; }
  .tab { font-size: 0.82rem; padding: 10px 8px; }
}

/* ── Reduced motion ─────────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* ── Footer ──────────────────────────────────────────────────────────────────── */
.site-footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: center;
}
.gh-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.8rem;
  transition: color var(--transition);
}
.gh-link:hover { color: var(--text); }
.gh-icon { width: 16px; height: 16px; flex-shrink: 0; }