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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, rgba(96, 120, 255, 0.12), transparent 28%),
    radial-gradient(circle at bottom right, rgba(95, 125, 255, 0.08), transparent 28%),
    #080a13;
  color: #e0e0e0;
  display: flex;
  align-items: stretch;
}

/* ---- Layout ---- */
.container {
  display: grid;
  grid-template-columns: 300px 1fr;
  width: 100%;
  height: 100vh;
}

/* ---- Sidebar ---- */
.panel {
  background: rgba(12, 16, 34, 0.98);
  border-right: 1px solid rgba(70, 80, 150, 0.18);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.panel-header {
  padding: 24px 20px 18px;
  border-bottom: 1px solid rgba(71, 88, 197, 0.2);
  background: linear-gradient(180deg, rgba(30, 37, 74, 0.98), rgba(11, 14, 30, 0.98));
  flex-shrink: 0;
}

.brand-title {
  display: flex;
  align-items: center;
  gap: 18px;
}

.brand-logo {
  width: 96px;
  height: auto;
  min-width: 96px;
  border-radius: 18px;
  padding: 8px;
  filter: drop-shadow(0 0 18px rgba(95, 125, 255, 0.35));
}

.brand-label {
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #8ea0ff;
  margin-bottom: 4px;
}

.panel-header h1 {
  font-size: 22px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.3px;
  margin: 0;
}

.tool-tagline {
  margin: 6px 0 0;
  font-size: 12px;
  color: #b5bfff;
}

.panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  scrollbar-width: thin;
  scrollbar-color: #2a2a2a transparent;
}

.panel-body::-webkit-scrollbar { width: 4px; }
.panel-body::-webkit-scrollbar-track { background: transparent; }
.panel-body::-webkit-scrollbar-thumb { background: #2a2a2a; border-radius: 4px; }

/* ---- Section title ---- */
.section-title {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: #444;
  margin-bottom: 8px;
}

/* ---- Algorithms ---- */
.algo-list { display: flex; flex-direction: column; gap: 10px; }

.algo-label {
  flex: 1;
  font-size: 12px;
  color: #888;
  display: flex;
  align-items: center;
  gap: 6px;
}

.algo-bits {
  font-size: 10px;
  color: #333;
  font-family: monospace;
}

/* ---- Row / toggle ---- */
.row { display: flex; gap: 8px; align-items: center; }
.row > label:first-child { flex: 1; font-size: 12px; color: #888; }

.toggle {
  position: relative;
  display: inline-block;
  width: 36px;
  height: 20px;
  flex-shrink: 0;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: #1e1e1e;
  border: 1px solid #2a2a2a;
  border-radius: 20px;
  transition: background .2s;
}
.slider::before {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  left: 2px;
  top: 50%;
  transform: translateY(-50%);
  background: #444;
  border-radius: 50%;
  transition: transform .2s, background .2s;
}
.toggle input:checked + .slider { background: rgba(95, 125, 255, 0.25); border-color: #5f7dff; }
.toggle input:checked + .slider::before { transform: translate(16px, -50%); background: #5f7dff; }

/* ---- File drop ---- */
.file-drop {
  position: relative;
  border: 1px dashed #1e2340;
  border-radius: 8px;
  padding: 14px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: #444;
}
.file-drop:hover, .file-drop.drag-over {
  border-color: #5f7dff;
  background: rgba(95,125,255,0.05);
  color: #8ea0ff;
}
.file-drop input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}
.file-drop p { font-size: 12px; line-height: 1.4; }
.file-drop p span { display: block; font-size: 10px; margin-top: 2px; color: #333; }

.file-name {
  font-size: 11px;
  color: #5f7dff;
  margin-top: 5px;
  word-break: break-all;
}

/* ---- Security note ---- */
.security-note {
  font-size: 11px;
  color: #2a2a3a;
  line-height: 1.5;
}

/* ---- Divider ---- */
hr { border: none; border-top: 1px solid #1c1c1c; }

/* ---- Output side ---- */
.output-side {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* ---- IO section (input textarea) ---- */
.io-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-bottom: 1px solid rgba(70, 80, 150, 0.12);
}

.io-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px 8px;
  flex-shrink: 0;
  border-bottom: 1px solid rgba(70, 80, 150, 0.1);
  background: rgba(10, 13, 28, 0.6);
  gap: 10px;
}

.io-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: #444;
}

.output-meta {
  font-size: 11px;
  color: #444;
  font-family: monospace;
}

.action-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(95,125,255,0.1);
  color: #8ea0ff;
  border: 1px solid rgba(95,125,255,0.2);
  border-radius: 7px;
  padding: 4px 10px;
  font-size: 11px;
  cursor: pointer;
  transition: background .15s, color .15s;
  white-space: nowrap;
}
.action-btn:hover { background: rgba(95,125,255,0.2); color: #fff; }
.action-btn.copied { color: #00c878; border-color: rgba(0,200,120,0.3); background: rgba(0,200,120,0.08); }

textarea {
  flex: 1;
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: #e0e0e0;
  font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
  font-size: 13px;
  padding: 14px 20px;
  resize: none;
  line-height: 1.7;
  scrollbar-width: thin;
  scrollbar-color: #1e1e1e transparent;
}
textarea::-webkit-scrollbar { width: 6px; }
textarea::-webkit-scrollbar-track { background: transparent; }
textarea::-webkit-scrollbar-thumb { background: #1e1e1e; border-radius: 4px; }
textarea::placeholder { color: #2a2a3a; }

/* ---- Results section ---- */
.results-section {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
}

.results-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px 8px;
  flex-shrink: 0;
  border-bottom: 1px solid rgba(70, 80, 150, 0.1);
  background: rgba(10, 13, 28, 0.6);
}

.hash-list {
  display: flex;
  flex-direction: column;
}

.hash-row {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 10px 20px;
  border-bottom: 1px solid rgba(70, 80, 150, 0.06);
  transition: background .12s;
}
.hash-row:last-child { border-bottom: none; }
.hash-row:hover { background: rgba(95, 125, 255, 0.03); }
.hash-row.hidden { display: none; }

.hash-algo {
  font-size: 10px;
  font-weight: 700;
  color: #5f7dff;
  letter-spacing: 0.5px;
  font-family: monospace;
  min-width: 58px;
  padding-top: 2px;
  flex-shrink: 0;
}

.hash-value {
  flex: 1;
  font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
  font-size: 11px;
  color: #a0b0d0;
  letter-spacing: 0.5px;
  word-break: break-all;
  line-height: 1.7;
}
.hash-value.empty { color: #2a2a3a; }

.hash-copy-btn {
  flex-shrink: 0;
  background: transparent;
  border: none;
  color: #2a2a3a;
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  transition: color .15s;
  margin-top: 1px;
}
.hash-copy-btn:hover { color: #8ea0ff; }
.hash-copy-btn.copied { color: #00c878; }

/* ---- Mobile ---- */
@media (max-width: 700px) {
  html, body { overflow: auto; height: auto; }

  .container {
    grid-template-columns: 1fr;
    height: auto;
    min-height: 100vh;
  }

  .panel { height: auto; overflow: visible; border-right: none; border-bottom: 1px solid rgba(70,80,150,0.18); }
  .panel-body { overflow: visible; }

  .output-side { height: auto; }
  .io-section { flex: unset; min-height: 180px; }
}