@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;600;700&display=swap");

:root {
  color-scheme: light;
  --bg: #ffffff;
  --ink: #1a1a1a;
  --muted: #6b6b6b;
  --card: #ffffff;
  --accent: #2d6cdf;
  --border: #e2ddd3;
  --shadow: 0 10px 30px rgba(20, 20, 20, 0.12);
  --radius: 16px;
}

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

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Avenir Next", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 20px 64px;
  display: grid;
  gap: 28px;
}

.hero {
  display: grid;
  gap: 10px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 12px;
  color: var(--muted);
  margin: 0;
}

h1 {
  font-size: clamp(28px, 4vw, 44px);
  margin: 0;
}

.sub {
  max-width: 560px;
  color: var(--muted);
  margin: 0;
}

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 16px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
}

.file-input {
  border: 1px dashed var(--border);
  border-radius: 12px;
  padding: 10px 14px;
  cursor: pointer;
  background: #faf8f3;
  font-weight: 600;
}

.file-input input {
  display: none;
}

.field {
  display: grid;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

select {
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  font-size: 14px;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.buttons {
  display: flex;
  gap: 10px;
}

button {
  padding: 10px 16px;
  border-radius: 12px;
  border: 1px solid transparent;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button#downloadBtn {
  background: #1f1f1f;
}

.status {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
}

.spinner {
  width: 18px;
  height: 18px;
  border-radius: 999px;
  border: 2px solid #d1c8bb;
  border-top-color: var(--accent);
  animation: spin 1s linear infinite;
}

.hidden {
  display: none;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.preview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.preview-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: grid;
  gap: 12px;
}

.preview-card h2 {
  margin: 0;
  font-size: 16px;
}

.preview-frame {
  border-radius: 12px;
  background: #f6f2ea;
  min-height: 260px;
  display: grid;
  place-items: center;
  overflow: hidden;
  position: relative;
}

.preview-frame.white {
  background: #f9f7f1;
  border: 1px solid #f0eee7;
}

.preview-frame img {
  max-width: 100%;
  height: auto;
  display: none;
}

.preview-frame.has-image img {
  display: block;
}

.download-stack {
  position: absolute;
  right: 12px;
  bottom: 12px;
  display: grid;
  gap: 8px;
  opacity: 1;
  transform: translateY(0);
}

.download-btn {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: rgba(31, 31, 31, 0.9);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

.download-btn.secondary {
  background: rgba(31, 31, 31, 0.7);
}

.download-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

@media (max-width: 720px) {
  .controls {
    flex-direction: column;
    align-items: stretch;
  }

  .buttons {
    flex-direction: column;
  }

  button {
    width: 100%;
  }
}