:root {
  --bg: #f6f4f1;
  --card: #ffffff;
  --text: #1f1d1a;
  --muted: #6b665f;
  --border: #e3ded6;
  --accent: #c2410c;
  --accent-text: #ffffff;
  --code-bg: #faf8f5;
  --error: #b91c1c;
  --ok: #15803d;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161513;
    --card: #201f1c;
    --text: #ede9e3;
    --muted: #a39d94;
    --border: #36332e;
    --accent: #fb923c;
    --accent-text: #1a1206;
    --code-bg: #1a1917;
    --error: #f87171;
    --ok: #4ade80;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Vazirmatn', Tahoma, sans-serif;
  line-height: 1.8;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

h1 { font-size: 1.6rem; margin: 0 0 8px; }
h2 { font-size: 1.05rem; margin: 0; }
.lead { color: var(--muted); margin: 0 0 24px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 16px;
}

.dropzone {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
  border: 2px dashed var(--border);
  border-radius: 12px;
  cursor: pointer;
  text-align: center;
  padding: 16px;
  transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone:focus-visible, .dropzone.dragover {
  border-color: var(--accent);
  outline: none;
}
.dropzone img { max-width: 100%; max-height: 420px; border-radius: 8px; }
.hint { color: var(--muted); }
.hint strong { color: var(--text); }

button {
  font: inherit;
  cursor: pointer;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  padding: 6px 14px;
}
button.primary {
  display: block;
  width: 100%;
  margin-top: 16px;
  padding: 12px;
  border: 0;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 700;
}
button:disabled { opacity: .5; cursor: not-allowed; }

.status { margin: 12px 0 0; min-height: 1.8em; color: var(--muted); }
.status.error { color: var(--error); }

.explanation { margin: 12px 0; white-space: pre-line; }
.meta { color: var(--muted); font-size: .9rem; margin: 0; }
.usage { text-align: center; }

.prompt-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.copy.copied { color: var(--ok); border-color: var(--ok); }

.prompt {
  margin: 0;
  padding: 14px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  white-space: pre-wrap;
  word-wrap: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .85rem;
  line-height: 1.6;
  text-align: left;
}

main.narrow { max-width: 420px; padding-top: 80px; }

h1 { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.logout { font-size: .85rem; font-weight: 400; color: var(--muted); }

.login { display: grid; gap: 14px; }
.login label { display: grid; gap: 6px; font-weight: 500; }
.login input {
  font: inherit;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--code-bg);
  color: var(--text);
}
.login input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.login .primary { margin-top: 4px; }

.hint-label { display: grid; gap: 2px; margin-top: 16px; font-weight: 500; }
.hint-label small { color: var(--muted); font-weight: 400; font-size: .8rem; }
#hint {
  width: 100%;
  margin-top: 8px;
  font: inherit;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--code-bg);
  color: var(--text);
  resize: vertical;
}
#hint:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.observations { margin-top: 12px; }
.observations summary { cursor: pointer; color: var(--muted); font-size: .9rem; }
.observations .prompt { margin-top: 10px; }