:root {
  --bg: #0f1115;
  --panel: #1a1d24;
  --panel-2: #232730;
  --accent: #4f7cff;
  --accent-hover: #6b91ff;
  --text: #e6e8ec;
  --muted: #9aa1ad;
  --border: #2c313c;
  --ok: #36c98b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #1c2230, var(--bg));
  color: var(--text);
  line-height: 1.6;
}

.app {
  max-width: 1080px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

header h1 {
  margin: 0 0 8px;
  font-size: 28px;
}

.sub {
  margin: 0 0 28px;
  color: var(--muted);
}

main {
  display: grid;
  gap: 20px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
}

.panel h2 {
  margin: 0 0 16px;
  font-size: 17px;
  color: var(--accent-hover);
}

/* Dropzone */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 36px 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  background: var(--panel-2);
}
.dropzone:hover, .dropzone.drag {
  border-color: var(--accent);
  background: #232a3a;
}
.dz-icon { font-size: 32px; }
.dz-inner p { margin: 8px 0 0; }
.dz-hint { color: var(--muted); font-size: 13px; }

/* Card list */
.card-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}
.card-thumb {
  position: relative;
  width: 88px;
  height: 123px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
}
.card-thumb img { width: 100%; height: 100%; object-fit: cover; }
.card-thumb button {
  position: absolute;
  top: 4px; right: 4px;
  width: 22px; height: 22px;
  border: none;
  border-radius: 50%;
  background: rgba(0,0,0,.65);
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
}
.card-thumb button:hover { background: #d9483b; }

/* Options */
.opt-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.opt { display: flex; flex-direction: column; gap: 6px; font-size: 14px; }
.opt > span { color: var(--muted); }
.opt.checkbox { flex-direction: row; align-items: center; gap: 10px; }
.opt.checkbox span { color: var(--text); }

input[type="number"], select {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 9px 10px;
  font-size: 14px;
}
input[type="number"]:focus, select:focus { outline: none; border-color: var(--accent); }
input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent); }

.cs-row { display: flex; align-items: center; gap: 8px; }
.cs-row input { width: 90px; }
.cs-row .x { color: var(--muted); }

/* Preview */
.preview-wrap {
  display: flex;
  justify-content: center;
  background: var(--panel-2);
  border-radius: 12px;
  padding: 18px;
}
#preview {
  background: #fff;
  box-shadow: 0 8px 30px rgba(0,0,0,.4);
  max-width: 100%;
  height: auto;
}

.actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 18px;
}

.btn {
  border: none;
  border-radius: 10px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn:disabled { opacity: .45; cursor: not-allowed; }

.status { color: var(--ok); font-size: 14px; }

footer {
  margin-top: 32px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}