@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=Noto+Sans+JP:wght@300;400;700&display=swap');

:root {
  --bg: #0a0a0f;
  --surface: #111118;
  --border: #2a2a3a;
  --accent: #00e5ff;
  --accent2: #7b2fff;
  --text: #e8e8f0;
  --muted: #6b6b80;
  --success: #00ff9d;
  --error: #ff4f6e;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Noto Sans JP', sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse 60% 40% at 20% 20%, rgba(0,229,255,0.05) 0%, transparent 60%),
              radial-gradient(ellipse 50% 50% at 80% 80%, rgba(123,47,255,0.07) 0%, transparent 60%);
  pointer-events: none;
}

/* ── Header ── */
.header {
  text-align: center;
  margin-bottom: 3rem;
}

.header h1 {
  font-family: 'Space Mono', monospace;
  font-size: clamp(1.4rem, 4vw, 2.2rem);
  letter-spacing: 0.1em;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.header h1 span {
  color: var(--accent);
}

.header p {
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

.badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent2), var(--accent));
  color: #000;
  font-family: 'Space Mono', monospace;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

/* ── Container ── */
.container {
  width: 100%;
  max-width: 560px;
}

/* ── Drop Zone ── */
.drop-zone {
  border: 1.5px dashed var(--border);
  border-radius: 4px;
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  background: var(--surface);
  position: relative;
  overflow: hidden;
}

.drop-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,229,255,0) 0%, rgba(0,229,255,0.03) 100%);
  opacity: 0;
  transition: opacity 0.2s;
}

.drop-zone.drag-over {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), inset 0 0 30px rgba(0,229,255,0.05);
}

.drop-zone.drag-over::before { opacity: 1; }

.drop-zone:hover {
  border-color: var(--muted);
}

.drop-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  opacity: 0.4;
  transition: opacity 0.2s, transform 0.2s;
}

.drop-zone:hover .drop-icon,
.drop-zone.drag-over .drop-icon {
  opacity: 0.9;
  transform: translateY(-3px);
}

.drop-icon svg { width: 100%; height: 100%; }

.drop-text {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.7;
}

.drop-text strong {
  color: var(--accent);
  font-family: 'Space Mono', monospace;
  font-size: 0.85rem;
}

#fileInput { display: none; }

/* ── File List ── */
.file-list {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.file-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0.8rem 1rem;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  animation: slideIn 0.2s ease;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.file-name {
  font-family: 'Space Mono', monospace;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-size {
  color: var(--muted);
  font-size: 0.72rem;
  margin-top: 2px;
}

.file-status {
  font-family: 'Space Mono', monospace;
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
  white-space: nowrap;
}

.status-pending    { background: rgba(107,107,128,0.2); color: var(--muted); }
.status-processing { background: rgba(0,229,255,0.1);   color: var(--accent); }
.status-done       { background: rgba(0,255,157,0.1);   color: var(--success); }
.status-error      { background: rgba(255,79,110,0.1);  color: var(--error); }

/* ── Progress Bar ── */
.progress-bar-wrap {
  grid-column: 1 / -1;
  height: 2px;
  background: var(--border);
  border-radius: 1px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent2), var(--accent));
  width: 0%;
  transition: width 0.3s ease;
  border-radius: 1px;
}

/* ── Buttons ── */
.convert-btn {
  display: block;
  width: 100%;
  margin-top: 1.5rem;
  padding: 0.9rem 1.5rem;
  background: linear-gradient(135deg, var(--accent2) 0%, var(--accent) 100%);
  border: none;
  border-radius: 3px;
  color: #000;
  font-family: 'Space Mono', monospace;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
}

.convert-btn:hover:not(:disabled) {
  opacity: 0.9;
  transform: translateY(-1px);
}

.convert-btn:active:not(:disabled) { transform: translateY(0); }

.convert-btn:disabled {
  background: var(--border);
  color: var(--muted);
  cursor: not-allowed;
}

.clear-btn {
  display: block;
  width: 100%;
  margin-top: 0.8rem;
  padding: 0.6rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--muted);
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

.clear-btn:hover {
  border-color: var(--error);
  color: var(--error);
}

/* ── Info Grid ── */
.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.info-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0.8rem 1rem;
}

.info-label {
  font-family: 'Space Mono', monospace;
  font-size: 0.62rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.3rem;
}

.info-value {
  font-family: 'Space Mono', monospace;
  font-size: 1rem;
  color: var(--accent);
}

/* ── Log ── */
.log {
  margin-top: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1rem;
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
  max-height: 140px;
  overflow-y: auto;
  line-height: 1.8;
}

.log-line.ok   { color: var(--success); }
.log-line.err  { color: var(--error); }
.log-line.info { color: var(--accent); }