:root {
  --bg: #0a0f0d;
  --panel-bg: #11201a;
  --panel-border: #1f3329;
  --text: #e9f3ee;
  --text-dim: #8fa89c;
  --accent: #29d67a;
  --accent-dim: #1b6b2f;
  --accent-strong: #00e676;
  --warn: #f5a623;
  --danger: #ff5c5c;
  --mono: 'JetBrains Mono', monospace;
  --sans: 'Inter', sans-serif;
  --radius: 10px;
}

[data-theme="light"] {
  --bg: #f3f6f4;
  --panel-bg: #ffffff;
  --panel-border: #d7e2dc;
  --text: #12211a;
  --text-dim: #5c6f66;
  --accent: #1b6b2f;
  --accent-dim: #1b6b2f;
  --accent-strong: #006a39;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  transition: background .3s ease, color .3s ease;
}

.scanline {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: .5;
  animation: scan 6s linear infinite;
  z-index: 50;
  pointer-events: none;
}
@keyframes scan {
  0% { transform: translateY(0); opacity: 0; }
  5% { opacity: .6; }
  95% { opacity: .6; }
  100% { transform: translateY(100vh); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .scanline { animation: none; display: none; }
  .cursor { animation: none !important; }
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  border-bottom: 1px solid var(--panel-border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}
.brand {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: .02em;
}
.prompt { color: var(--accent-strong); margin-right: 6px; }
.cursor {
  display: inline-block;
  color: var(--accent-strong);
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.topbar-actions { display: flex; align-items: center; gap: 12px; }
.algo-pill {
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--accent);
  border: 1px solid var(--panel-border);
  padding: 4px 10px;
  border-radius: 20px;
  letter-spacing: .03em;
}
.icon-btn {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  color: var(--text);
  width: 34px; height: 34px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  transition: border-color .2s ease;
}
.icon-btn:hover { border-color: var(--accent); }

.wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.hero h1 {
  font-family: var(--mono);
  font-size: clamp(1.6rem, 4vw, 2.3rem);
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}
.hero .sub {
  color: var(--text-dim);
  font-size: .98rem;
  line-height: 1.6;
  max-width: 620px;
  margin: 0 0 32px;
}
.hero .sub code {
  font-family: var(--mono);
  background: var(--panel-bg);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: .85em;
  border: 1px solid var(--panel-border);
}

.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--panel-border);
  margin-bottom: 24px;
  overflow-x: auto;
}
.tab {
  background: none;
  border: none;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: .82rem;
  padding: 10px 16px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color .2s ease, border-color .2s ease;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent-strong); border-bottom-color: var(--accent-strong); }

.panel { display: none; animation: fadeIn .25s ease; }
.panel.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }

.panel-desc { color: var(--text-dim); font-size: .9rem; margin-bottom: 18px; }

.field-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.field-row label { font-size: .85rem; color: var(--text-dim); }
.check-inline { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.check-inline input { accent-color: var(--accent-strong); }

select, textarea, input[type=text] {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-radius: var(--radius);
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: .9rem;
  outline: none;
  transition: border-color .2s ease;
}
select { cursor: pointer; }
select:focus, textarea:focus { border-color: var(--accent-strong); }

textarea {
  width: 100%;
  resize: vertical;
  line-height: 1.5;
  margin-bottom: 4px;
}

.btn-primary {
  background: var(--accent-strong);
  color: #06170d;
  border: none;
  font-family: var(--mono);
  font-weight: 600;
  font-size: .85rem;
  padding: 11px 20px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform .12s ease, box-shadow .2s ease;
}
.btn-primary:hover { box-shadow: 0 0 0 3px rgba(41,214,122,0.18); }
.btn-primary:active { transform: scale(.97); }
.btn-file { display: inline-block; }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--panel-border);
  color: var(--text);
  font-family: var(--mono);
  font-size: .8rem;
  padding: 9px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color .2s ease, color .2s ease;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-strong); }

.meta { font-size: .78rem; color: var(--text-dim); font-family: var(--mono); }

.result-block {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-left: 3px solid var(--accent-strong);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-top: 14px;
}
.result-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.result-label {
  font-family: var(--mono);
  font-size: .75rem;
  color: var(--accent);
  border: 1px solid var(--panel-border);
  padding: 3px 8px;
  border-radius: 6px;
  flex-shrink: 0;
}
.result-value-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
}
.hash-value {
  font-family: var(--mono);
  font-size: .85rem;
  word-break: break-all;
  color: var(--text);
  flex: 1;
}
.copy-btn {
  background: transparent;
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: .72rem;
  padding: 5px 10px;
  border-radius: 6px;
  cursor: pointer;
  flex-shrink: 0;
  transition: all .15s ease;
}
.copy-btn:hover { border-color: var(--accent); color: var(--accent-strong); }
.copy-btn.copied { color: var(--accent-strong); border-color: var(--accent-strong); }
.result-timing { margin-top: 8px; font-size: .72rem; color: var(--text-dim); font-family: var(--mono); }

.all-algo-grid { margin-top: 16px; display: grid; gap: 8px; }

.actions-row { margin-top: 14px; }

/* Dropzone */
.dropzone {
  border: 2px dashed var(--panel-border);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  transition: border-color .2s ease, background .2s ease;
  margin-bottom: 6px;
}
.dropzone.dragover { border-color: var(--accent-strong); background: rgba(41,214,122,0.06); }
.dz-title { font-family: var(--mono); font-size: .95rem; margin: 0 0 4px; }
.dz-sub { color: var(--text-dim); font-size: .8rem; margin: 4px 0 14px; }

.file-info {
  font-family: var(--mono);
  font-size: .82rem;
  color: var(--text-dim);
  margin-top: 10px;
  padding: 10px 14px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
}

.progress-track {
  height: 6px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  margin-top: 10px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent-strong);
  transition: width .15s ease;
}

/* Compare */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 14px;
}
.compare-field label { display: block; font-size: .8rem; color: var(--text-dim); margin-bottom: 6px; }
.compare-field textarea { width: 100%; }
.compare-result {
  margin-top: 16px;
  font-family: var(--mono);
  font-size: .9rem;
  padding: 14px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--panel-border);
}
.compare-result.match { border-left: 3px solid var(--accent-strong); color: var(--accent-strong); }
.compare-result.mismatch { border-left: 3px solid var(--danger); color: var(--danger); }

/* History */
.history-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
.history-item {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-family: var(--mono);
  font-size: .78rem;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.history-item .h-hash { word-break: break-all; color: var(--text-dim); flex: 1; min-width: 200px; }
.empty-state { color: var(--text-dim); font-size: .85rem; font-family: var(--mono); }

.footer {
  text-align: center;
  padding: 24px;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: .72rem;
  border-top: 1px solid var(--panel-border);
}
.dot { margin: 0 8px; }

/* Responsive */
@media (max-width: 640px) {
  .topbar { padding: 14px 16px; }
  .wrap { padding: 24px 16px 60px; }
  .compare-grid { grid-template-columns: 1fr; }
  .field-row { gap: 10px; }
  .result-row { flex-direction: column; align-items: flex-start; }
  .result-value-wrap { width: 100%; }
}