:root {
  color-scheme: light dark;
  --paper: #f5efe1;
  --paper-well: #fbf8f0;
  --ink: #201c14;
  --ink-soft: #4d4636;
  --muted: #8c826d;
  --hairline: #ded2b4;
  --accent: #b8451f;
  --accent-ink: #fff8ef;
  --accent-soft: rgba(184, 69, 31, 0.1);
  --shadow: rgba(32, 28, 20, 0.08);
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #1a1712;
    --paper-well: #211d16;
    --ink: #efe7d4;
    --ink-soft: #cabfa4;
    --muted: #8c8268;
    --hairline: #37311f;
    --accent: #e37a48;
    --accent-ink: #211004;
    --accent-soft: rgba(227, 122, 72, 0.14);
    --shadow: rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }
::selection { background: var(--accent-soft); color: var(--ink); }
[hidden] { display: none !important; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.15em; }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

body {
  margin: 0;
  padding: 3rem 1.25rem 4rem;
  background: var(--paper);
  color: var(--ink);
  font-family: ui-serif, Georgia, "Iowan Old Style", "Palatino Linotype", "Times New Roman", serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

main { max-width: 920px; margin: 0 auto; }

.kicker {
  font-family: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  text-align: center;
  margin: 0 0 0.75rem;
}

h1 {
  font-size: 1.7rem;
  font-weight: 600;
  text-align: center;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
}

.lede {
  text-align: center;
  color: var(--ink-soft);
  font-style: italic;
  font-size: 1.05rem;
  max-width: 48ch;
  margin: 0 auto 2.5rem;
}

.workbench {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
}

form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.field-label {
  font-family: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.dropzone {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 8.5rem;
  padding: 1.1rem 1rem;
  text-align: center;
  cursor: pointer;
  background: var(--paper-well);
  border: 1px dashed var(--hairline);
  border-radius: 0.25rem;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.dropzone:hover, .dropzone.drag {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.dropzone:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.dropzone input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.dropzone-text {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
}
.dropzone.has-file .dropzone-text { color: var(--accent); }

.dropzone-hint {
  font-family: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

#caption {
  font-family: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.95rem;
  line-height: 1.5;
  color: #fff;
  background: #000;
  border: 1px solid var(--ink);
  border-radius: 0.25rem;
  padding: 0.7rem 0.85rem;
}
#caption::placeholder {
  color: rgba(255, 255, 255, 0.45);
  opacity: 1;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

button, .download {
  font: inherit;
  font-size: 0.95rem;
  padding: 0.55rem 1.15rem;
  border: 1px solid var(--accent);
  border-radius: 0.25rem;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

button {
  background: var(--accent);
  color: var(--accent-ink);
}
button:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
button:disabled {
  opacity: 0.55;
  cursor: default;
}
button:disabled:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.download {
  display: inline-block;
  text-align: center;
  text-decoration: none;
  background: transparent;
  color: var(--accent);
}
.download:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

.error {
  font-family: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.85rem;
  color: var(--ink-soft);
  background: var(--paper-well);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--accent);
  padding: 0.9rem 1.1rem;
  margin: 0;
}

.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 17rem;
  background: var(--paper-well);
  border: 1px dashed var(--hairline);
  border-radius: 0.25rem;
}
.placeholder p {
  font-family: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0;
}

#output {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 70vh;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--hairline);
  border-radius: 0.25rem;
  box-shadow: 0 1px 2px var(--shadow);
}

footer {
  text-align: center;
  font-family: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 3rem;
}
footer a { color: inherit; }
footer a:hover { color: var(--accent); }

@media (max-width: 720px) {
  .workbench { grid-template-columns: 1fr; }
  .placeholder { min-height: 12rem; }
}

@media (prefers-reduced-motion: reduce) {
  .dropzone, button, .download { transition: none; }
}