html { font-size: 120%; }
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:             #0e0d0c;
  --surface:        #191817;
  --surface-hi:     #222120;
  --border:         #2d2b29;
  --border-mid:     #3d3b38;
  --accent:         #c49a3c;
  --accent-dim:     rgba(196, 154, 60, 0.10);
  --text:           #e2dbd0;
  --text-mid:       #bab2a8;
  --text-dim:       #908880;
  --success:        #4a7a5a;
  --success-bg:     rgba(74, 122, 90, 0.12);
  --success-border: rgba(74, 122, 90, 0.35);
  --error-bg:       rgba(138, 64, 64, 0.12);
  --error-border:   rgba(138, 64, 64, 0.35);
  --font:           'IBM Plex Mono', monospace;
  --radius:         5px;
  --ease:           180ms ease;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 52px 20px 72px;
}

/* Dot-grid atmosphere */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle, #2d2b29 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: 0.45;
  pointer-events: none;
}

.page {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 500px;
}

header {
  margin-bottom: 32px;
}

.title {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text);
  margin-bottom: 7px;
}

.title .arrow {
  color: var(--accent);
  margin: 0 3px;
}

.subtitle {
  font-size: 0.58rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
}

/* Drop zone */
.drop-zone {
  position: relative;
  border: 1px dashed var(--border-mid);
  border-radius: var(--radius);
  padding: 38px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--ease), background var(--ease);
  user-select: none;
}

.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

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

.drop-icon {
  display: block;
  width: 32px;
  height: 32px;
  margin: 0 auto 12px;
  color: var(--text-dim);
  transition: color var(--ease);
}

.drop-zone:hover .drop-icon,
.drop-zone.dragover .drop-icon {
  color: var(--accent);
}

.drop-label {
  font-size: 0.82rem;
  color: var(--text-mid);
  margin-bottom: 4px;
}

.drop-hint {
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.03em;
}

.file-badge {
  display: none;
  margin-top: 14px;
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.01em;
}

.file-badge.visible {
  display: block;
}

/* Options */
.options {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
}

.options label {
  font-size: 0.72rem;
  color: var(--text-mid);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}

select {
  font-family: var(--font);
  font-size: 0.8rem;
  padding: 7px 28px 7px 10px;
  background: var(--surface-hi);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='9' height='5' viewBox='0 0 9 5'%3E%3Cpath d='M0 0l4.5 5L9 0z' fill='%235a5550'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  transition: border-color var(--ease);
}

select:hover, select:focus {
  border-color: var(--border-mid);
  outline: none;
}


/* Download area */
.download-area {
  margin-top: 18px;
  padding: 14px 16px;
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  border-radius: var(--radius);
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  animation: fadeIn 200ms ease;
}

.download-area.visible {
  display: flex;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.download-info {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
}

.check-icon {
  color: #5a9f70;
  flex-shrink: 0;
}

.download-name {
  font-size: 0.78rem;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.download-btn {
  font-family: var(--font);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 8px 14px;
  background: var(--success);
  color: #d0e8d8;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  transition: opacity var(--ease);
}

.download-btn:hover {
  opacity: 0.82;
}

/* Error area */
.error-area {
  margin-top: 18px;
  padding: 13px 16px;
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  border-radius: var(--radius);
  font-size: 0.76rem;
  color: #c07878;
  line-height: 1.65;
  display: none;
}

.error-area.visible {
  display: block;
}

footer {
  margin-top: 26px;
  font-size: 0.68rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
  text-align: center;
  line-height: 1.8;
}

footer a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--ease);
}

footer a:hover {
  color: var(--text-mid);
}

.version-badge {
  position: fixed;
  top: 8px;
  right: 12px;
  font-size: 10px;
  opacity: 0.35;
  font-family: monospace;
  pointer-events: none;
}