:root {
  --paper: #FAFAF9;
  --panel: #FFFFFF;
  --ink: #16171A;
  --muted: #7A7D82;
  --line: #E4E4E1;
  --before: #E4572E;
  --after: #1B9C85;
  --drop-hover-bg: #F3FBF9;
  --body-text: #34363A;
  --radius: 4px;
  --display: 'Archivo', sans-serif;
  --body: 'Archivo', sans-serif;
  --mono: 'Space Mono', ui-monospace, monospace;
}

html[data-theme="dark"] {
  --paper: #14151A;
  --panel: #1D1F26;
  --ink: #F2F2F0;
  --muted: #9A9DA6;
  --line: #2E313B;
  --before: #FF7A52;
  --after: #3FCDAE;
  --drop-hover-bg: #172420;
  --body-text: #C7C9CE;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 8px 8px;
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--after); text-decoration: none; }
a:hover { text-decoration: underline; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--after);
  outline-offset: 2px;
}

.wordmark {
  font-family: var(--display); font-weight: 800; font-size: 1.05rem; letter-spacing: -.01em; color: var(--ink);
}

header.nav {
  display: flex; justify-content: space-between; align-items: center;
  padding: 22px 32px; border-bottom: 1px solid var(--line); background: var(--paper);
}
.nav-links { display: flex; align-items: center; gap: 22px; font-family: var(--mono); font-size: .74rem; text-transform: uppercase; letter-spacing: .04em; }
.nav-links a { color: var(--muted); }
.nav-links a:hover { color: var(--ink); text-decoration: none; }
.theme-toggle {
  font-family: var(--mono); font-size: .72rem; text-transform: uppercase; letter-spacing: .04em;
  background: none; border: 1px solid var(--line); color: var(--muted); padding: 6px 12px;
  border-radius: var(--radius); cursor: pointer;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--ink); }

main { max-width: 1040px; margin: 0 auto; padding: 0 32px; }

/* Hero */
.hero { padding: 56px 0 36px; max-width: 720px; }
.hero .eyebrow { font-family: var(--mono); font-size: .74rem; text-transform: uppercase; letter-spacing: .08em; color: var(--after); margin: 0 0 14px; }
.hero h1 { font-family: var(--display); font-weight: 800; font-size: clamp(2rem, 4vw, 3rem); line-height: 1.08; margin: 0 0 16px; }
.hero p.lead { color: var(--body-text); font-size: 1.16rem; margin: 0; }

/* Drop zone */
.tool { padding: 8px 0 72px; }
.drop-zone {
  border: 2px dashed var(--line); border-radius: 8px; background: var(--panel);
  padding: 40px 24px; text-align: center; cursor: pointer; transition: border-color .15s ease, background .15s ease;
}
.drop-zone:hover, .drop-zone.dragover { border-color: var(--after); background: var(--drop-hover-bg); }
.drop-zone p { margin: 0; font-family: var(--mono); font-size: .94rem; color: var(--body-text); }
.drop-zone p.big { font-family: var(--display); font-weight: 700; font-size: 1.1rem; color: var(--ink); margin-bottom: 6px; }

/* Controls */
.controls-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 8px;
  padding: 24px; margin-top: 20px;
}
.control-row { display: flex; flex-wrap: wrap; gap: 24px; align-items: flex-end; margin-bottom: 18px; }
.control-group label {
  display: block; font-family: var(--mono); font-size: .7rem; text-transform: uppercase;
  letter-spacing: .05em; color: var(--muted); margin-bottom: 8px;
}
.control-group input[type="number"] {
  font-family: var(--body); font-size: .95rem; padding: 9px 10px; border: 1px solid var(--line);
  border-radius: var(--radius); background: var(--paper); color: var(--ink);
}
.control-group select {
  appearance: none; -webkit-appearance: none; -moz-appearance: none;
  font-family: var(--body); font-size: .95rem; padding: 9px 34px 9px 12px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background-color: var(--paper); color: var(--ink);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6'><path d='M0 0l5 6 5-6z' fill='%237A7D82'/></svg>");
  background-repeat: no-repeat;
  background-position: right 12px center;
  cursor: pointer;
  min-height: 40px;
}
.control-group select:hover { border-color: var(--muted); }
.mode-radios { display: flex; gap: 16px; font-family: var(--mono); font-size: .82rem; }
.mode-radios label { display: flex; align-items: center; gap: 6px; text-transform: none; letter-spacing: 0; color: var(--ink); margin-bottom: 0; }
#qualityGroup input[type="range"] { width: 180px; vertical-align: middle; }
#qualityValueLabel { font-family: var(--mono); margin-left: 8px; }
.target-inputs { display: flex; gap: 8px; align-items: center; }
.target-inputs input { width: 90px; }
.target-inputs select { width: 78px; padding-right: 28px; }
.png-note { font-family: var(--mono); font-size: .78rem; color: var(--before); margin: 0 0 14px; }
.png-note[hidden] { display: none; }

.action-row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
button.primary {
  font-family: var(--mono); font-size: .8rem; text-transform: uppercase; letter-spacing: .05em;
  padding: 12px 22px; border: 1px solid var(--ink); background: var(--ink); color: var(--paper);
  cursor: pointer; border-radius: var(--radius);
}
button.primary:hover:not(:disabled) { background: var(--after); border-color: var(--after); }
button.primary:disabled { opacity: .4; cursor: not-allowed; }
button.secondary {
  font-family: var(--mono); font-size: .8rem; text-transform: uppercase; letter-spacing: .05em;
  padding: 12px 22px; border: 1px solid var(--line); background: var(--panel); color: var(--ink);
  cursor: pointer; border-radius: var(--radius);
}
button.secondary:hover:not(:disabled) { border-color: var(--ink); }
button.secondary:disabled { opacity: .4; cursor: not-allowed; }

#summary { font-family: var(--mono); font-size: .84rem; color: var(--muted); margin: 14px 0 0; }

/* File list */
.file-list { margin-top: 20px; display: flex; flex-direction: column; gap: 10px; }
.file-row {
  display: flex; align-items: center; gap: 14px; background: var(--panel);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px;
}
.thumb { width: 48px; height: 48px; object-fit: cover; border-radius: 3px; background: var(--line); flex-shrink: 0; }
.thumb-loading { animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: .5; } 50% { opacity: .9; } }
.file-info { flex: 1; min-width: 0; }
.file-name { margin: 0 0 4px; font-size: .92rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-sizes { margin: 0; font-family: var(--mono); font-size: .82rem; display: flex; align-items: center; gap: 6px; }
.size-before { color: var(--before); }
.size-after { color: var(--after); }
.arrow { color: var(--muted); }
.saved-pct { color: var(--after); font-weight: 700; margin-left: 4px; }
.file-error { margin: 0; font-family: var(--mono); font-size: .82rem; color: var(--before); }
.file-actions { display: flex; gap: 8px; flex-shrink: 0; }
.file-actions button {
  font-family: var(--mono); font-size: .74rem; padding: 7px 12px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--paper); cursor: pointer;
}
.file-actions button:hover:not(:disabled) { border-color: var(--ink); }
.file-actions button:disabled { opacity: .35; cursor: not-allowed; }
.row-remove { font-size: .95rem !important; padding: 6px 10px !important; }

footer { border-top: 1px solid var(--line); padding: 32px; margin-top: 40px; background: var(--paper); }
footer .foot-inner { max-width: 1040px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
footer nav { display: flex; gap: 18px; font-family: var(--mono); font-size: .76rem; }
footer p { color: var(--muted); font-size: .76rem; margin: 0; font-family: var(--mono); }

/* Legal pages */
.legal { padding: 52px 0 80px; max-width: 720px; }
.legal h1 { font-family: var(--display); font-weight: 800; font-size: 2rem; margin-bottom: 6px; }
.legal .updated { font-family: var(--mono); font-size: .76rem; color: var(--muted); margin-bottom: 36px; }
.legal h2 { font-family: var(--display); font-weight: 700; font-size: 1.15rem; margin-top: 34px; }
.legal p, .legal li { color: var(--body-text); }
.legal ul { padding-left: 20px; }

.faq-item { border-bottom: 1px solid var(--line); padding: 18px 0; }
.faq-item summary {
  cursor: pointer; font-family: var(--display); font-weight: 700; font-size: 1.02rem;
  color: var(--ink); list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-family: var(--mono); font-size: 1.1rem; color: var(--after); flex-shrink: 0; }
.faq-item[open] summary::after { content: "–"; }
.faq-item p { margin: 12px 0 0; color: var(--body-text); }

.contact-card {
  max-width: 480px; padding: 26px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 8px; margin: 24px 0;
}
.contact-card p.kind { font-family: var(--mono); font-size: .7rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin: 0 0 6px; }
.mail-btn {
  display: inline-flex; align-items: center; font-family: var(--mono); font-size: .84rem;
  padding: 11px 20px; background: var(--ink); color: var(--paper); border-radius: var(--radius);
  margin-top: 8px;
}
.mail-btn:hover { background: var(--after); text-decoration: none; }

@media (max-width: 760px) {
  header.nav { padding: 18px; }
  main { padding: 0 18px; }
  .controls-card { padding: 18px; }
  .control-row { flex-direction: column; align-items: stretch; }
  .file-row { flex-wrap: wrap; }
}