/* Text-first UI. Three text tones (t1 > t2 > t3) — swap these variables to theme. */
:root {
  --bg: #ffffff;
  --t1: #1a1a1a;
  --t2: #6e6e6e;
  --t3: #a3a3a3;
  --hover: #ededed;
  --error: #b3261e;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131313;
    --t1: #e6e6e6;
    --t2: #969696;
    --t3: #5e5e5e;
    --hover: #242424;
    --error: #ff7168;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--t1);
  line-height: 1.65;
}

.container { max-width: 680px; margin: 0 auto; padding: 0 1.25rem; }

a { color: var(--t1); text-decoration: underline; text-underline-offset: 2px; }
a:hover { background: var(--hover); }

h1 { font-size: 1.7rem; line-height: 1.25; margin: 2rem 0 0.5rem; }
h2 { font-size: 1.15rem; margin: 2.5rem 0 0.5rem; }
h3 { font-size: 1rem; margin: 1.5rem 0 0.25rem; }
p, li { color: var(--t2); }
h1 + .sub, .privacy-line { color: var(--t2); margin-top: 0; }

/* Header / footer */
.site-header nav {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 1.1rem 0 0.5rem;
}
.brand { font-family: var(--mono); font-weight: 700; text-decoration: none; }
.nav-links a { margin-left: 1.25rem; color: var(--t2); text-decoration: none; }
.nav-links a:hover { color: var(--t1); background: var(--hover); }

main { padding-bottom: 3rem; }

.site-footer { margin-top: 3rem; padding: 1.5rem 0 2.5rem; font-size: 0.85rem; }
.site-footer p, .site-footer a { color: var(--t3); }
.site-footer nav a { margin-right: 1rem; text-decoration: none; }
.site-footer nav a:hover { color: var(--t1); background: var(--hover); }
.copyright { margin-bottom: 0; }

/* Buttons: no borders, no backgrounds — hover highlight only */
.btn, .format-btn {
  border: none;
  background: none;
  font: inherit;
  color: var(--t2);
  padding: 0.45rem 0.9rem;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover, .format-btn:hover { background: var(--hover); color: var(--t1); }
.btn.primary { color: var(--t1); font-weight: 600; }
.btn:disabled { color: var(--t3); cursor: wait; }
.format-btn { font-family: var(--mono); font-size: 0.9rem; color: var(--t3); }
.format-btn.selected { color: var(--t1); font-weight: 700; }

/* Tool UI */
.tool-ui { margin: 1.75rem 0; }
.dropzone {
  border: 1px dashed var(--t3);
  text-align: center;
  padding: 3rem 1rem;
  cursor: pointer;
}
.dropzone:hover, .dropzone:focus-visible, .dropzone.dragging { background: var(--hover); outline: none; }
.dz-primary { color: var(--t1); font-weight: 600; margin: 0; }
.dz-secondary { color: var(--t3); margin: 0.3rem 0 0; }

.file-info { display: flex; align-items: center; gap: 0.75rem; margin: 1rem 0; word-break: break-word; }
.file-info img { width: 56px; height: 56px; object-fit: contain; }
.file-info span { font-family: var(--mono); font-size: 0.8rem; color: var(--t2); }

.control-row { margin: 0.9rem 0; }
.control-row label, .row-label { display: inline-block; font-size: 0.92rem; color: var(--t2); margin-right: 0.5rem; }
.control-row select, .control-row input[type="range"] { max-width: 100%; accent-color: var(--t1); }
.control-row select { font: inherit; color: var(--t1); background: var(--bg); border: none; padding: 0.3rem 0; }
.control-row.dims { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; }
.control-row.dims label { margin: 0; display: flex; align-items: center; gap: 0.4rem; }
.control-row.dims input[type="number"] {
  width: 6rem;
  font: inherit;
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--t1);
  background: var(--bg);
  border: none;
  border-bottom: 1px solid var(--t3);
  padding: 0.2rem 0.1rem;
}
.control-row.dims input[type="number"]:focus { outline: none; border-bottom-color: var(--t1); }

.result p { font-family: var(--mono); font-size: 0.9rem; color: var(--t1); font-weight: 600; }
.result .btn { margin-right: 0.5rem; }

.error { color: var(--error); }

/* Content */
.tool-list { list-style: none; padding: 0; margin: 0.5rem 0; }
.tool-list li { margin: 0.35rem 0; }
.tool-list a { color: var(--t2); text-decoration: none; }
.tool-list a:hover { color: var(--t1); background: var(--hover); }

.related { list-style: none; padding: 0; }
.related li { margin: 0.35rem 0; }
.related a { color: var(--t2); text-decoration: none; }
.related a:hover { color: var(--t1); background: var(--hover); }

.faq details { padding: 0.5rem 0; }
.faq summary { color: var(--t1); font-weight: 600; cursor: pointer; }
.faq summary:hover { background: var(--hover); }
.faq details p { color: var(--t2); margin: 0.5rem 0 0.25rem; }

@media (max-width: 480px) {
  h1 { font-size: 1.4rem; }
  .dropzone { padding: 2.25rem 0.75rem; }
}