/* PDF Merge & Compress — one accent, real type, no slop. */

@font-face {
  font-family: "Inter Tight";
  src: url("fonts/InterTight-var.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("fonts/JetBrainsMono-var.woff2") format("woff2");
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
}

:root {
  --color-bg: #faf8f4;
  --color-surface: #ffffff;
  --color-surface-2: #f4f0e9;
  --color-text: #1c1a17;
  --color-text-muted: #6b645c;
  --color-border: #ddd6cc;
  --color-border-strong: #b9b0a4;
  --color-accent: #8a3b12;
  --color-accent-hover: #6f2f0e;
  --color-accent-soft: #f6e9df;
  --color-accent-contrast: #ffffff;
  --color-ok: #2f6b4f;
  --color-ok-soft: #e7f1ec;
  --color-warn: #8a3b12;
  --color-error: #a3271f;
  --color-error-soft: #f8e5e3;
  --radius: 6px;
  --radius-lg: 10px;
  --font-sans: "Inter Tight", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --ease: cubic-bezier(.2,.7,.2,1);
  --t-fast: 140ms;
  --t-med: 220ms;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  font: 16px/1.6 var(--font-sans);
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

main { max-width: 720px; margin: 0 auto; padding: 48px 20px 24px; }

.page-header { margin-bottom: 28px; }

h1 {
  font-size: 34px;
  line-height: 1.15;
  margin: 0 0 12px;
  font-weight: 700;
  letter-spacing: -0.022em;
  text-wrap: balance;
}
h2 { font-size: 20px; margin: 0 0 10px; font-weight: 650; letter-spacing: -0.012em; text-wrap: balance; }
h3 { font-size: 16px; margin: 20px 0 6px; font-weight: 600; }

.tagline { color: var(--color-text-muted); margin: 0; font-size: 17px; max-width: 58ch; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

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

/* ---- tool section ---- */
#tool {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  padding: 24px;
  margin: 24px 0;
}

/* ---- drop zone ---- */
#dropzone {
  border: 1.5px dashed var(--color-border-strong);
  border-radius: var(--radius);
  padding: 32px 20px 30px;
  text-align: center;
  cursor: pointer;
  color: var(--color-text-muted);
  background: var(--color-surface);
  transition: border-color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
#dropzone .dz-icon {
  display: block;
  width: 36px; height: 36px;
  margin: 0 auto 12px;
  color: var(--color-accent);
  transition: transform var(--t-med) var(--ease);
}
#dropzone .dz-title { margin: 0; font-size: 17px; font-weight: 600; color: var(--color-text); }
#dropzone .dz-sub { margin: 4px 0 0; font-size: 14px; }
#dropzone:hover,
#dropzone:focus-visible { border-color: var(--color-accent); background: var(--color-surface-2); color: var(--color-text); }
#dropzone.dragover { border-color: var(--color-accent); border-style: solid; background: var(--color-accent-soft); color: var(--color-text); }
#dropzone.dragover .dz-icon { transform: translateY(-2px) scale(1.06); }

/* ---- file list ---- */
#file-list { list-style: none; margin: 16px 0 0; padding: 0; }
#file-list:empty { margin: 0; }
#file-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}
#file-list li:first-child { border-top: 1px solid var(--color-border); }
#file-list .file-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#file-list .file-size {
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
  font-size: 12.5px;
  flex-shrink: 0;
}
#file-list .file-actions { display: flex; gap: 2px; flex-shrink: 0; }
#file-list .file-actions button {
  margin: 0;
  width: 34px; height: 34px;
  padding: 0;
  display: inline-grid; place-items: center;
  font-size: 15px;
  line-height: 1;
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
#file-list .file-actions button:hover:not(:disabled) { color: var(--color-text); background: var(--color-surface-2); border-color: var(--color-border); }
#file-list .file-actions button.remove:hover:not(:disabled) { color: var(--color-error); background: var(--color-error-soft); border-color: transparent; }
#file-list .file-actions button:disabled { opacity: 0.3; cursor: not-allowed; }

/* ---- compress options ---- */
#compress-options { margin: 20px 0; }
.checkbox-row { display: flex; align-items: center; gap: 10px; font-size: 15px; cursor: pointer; min-height: 32px; }
.checkbox-row input { width: 18px; height: 18px; margin: 0; accent-color: var(--color-accent); cursor: pointer; }

#compress-controls {
  margin-top: 12px;
  padding: 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface-2);
}
.field-row { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.field-row label { font-size: 14px; color: var(--color-text-muted); }
#target-kb {
  width: 96px; padding: 8px 10px; font: inherit; font-family: var(--font-mono); font-size: 15px;
  font-variant-numeric: tabular-nums;
  border: 1px solid var(--color-border); border-radius: var(--radius);
  background: var(--color-surface); color: var(--color-text);
}

.presets { margin: 0 0 12px; display: flex; gap: 8px; flex-wrap: wrap; }
.preset {
  padding: 7px 12px; border: 1px solid var(--color-border); border-radius: var(--radius);
  background: var(--color-surface); color: var(--color-text); font-size: 13px; font-weight: 500; cursor: pointer;
  font-family: var(--font-mono); font-variant-numeric: tabular-nums;
  margin: 0;
  transition: border-color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.preset:hover { border-color: var(--color-border-strong); }
.preset.active { background: var(--color-accent); color: var(--color-accent-contrast); border-color: var(--color-accent); }

.note { color: var(--color-text-muted); font-size: 13.5px; margin: 0; }

/* ---- buttons / inputs (general) ---- */
button {
  margin: 0;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  font: inherit;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
button:hover:not(:disabled) { background: var(--color-accent-hover); }
button:active:not(:disabled) { transform: translateY(1px); }
button:disabled { cursor: not-allowed; }

/* Primary action: stays recognisably primary even when waiting for files. */
#run { display: block; width: 100%; padding: 15px 22px; font-size: 16.5px; margin-top: 4px; letter-spacing: -0.005em; }
#run:disabled { background: var(--color-accent); opacity: 0.42; color: var(--color-accent-contrast); }
.run-hint { margin: 8px 0 0; font-size: 13.5px; color: var(--color-text-muted); text-align: center; min-height: 1.3em; }

input:focus-visible,
button:focus-visible,
a:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ---- progress ---- */
.progress-bar { height: 4px; border-radius: 2px; background: var(--color-border); overflow: hidden; margin: 16px 0 6px; }
.progress-bar-fill { height: 100%; width: 30%; background: var(--color-accent); animation: indeterminate 1.1s ease-in-out infinite; }
@keyframes indeterminate { 0% { transform: translateX(-100%); } 100% { transform: translateX(330%); } }
#progress { color: var(--color-text-muted); font-size: 14px; min-height: 1.4em; margin: 0; }
#progress:not(:empty) { margin-top: 10px; }

/* ---- result card: the loudest thing on the page after an action ---- */
#output {
  margin-top: 16px;
  padding: 20px 20px 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  animation: rise var(--t-med) var(--ease) both;
}
@keyframes rise { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
#output.result-ok { border-color: var(--color-ok); background: var(--color-ok-soft); }
#output.result-warn { border-color: var(--color-warn); background: var(--color-accent-soft); }
#output.result-error { border-color: var(--color-error); background: var(--color-error-soft); }
.result-title { margin: 0 0 4px; font-weight: 650; font-size: 17px; letter-spacing: -0.01em; }
.result-detail { margin: 0 0 14px; color: var(--color-text-muted); font-size: 14px; white-space: pre-line; }
.result-figures { display: flex; align-items: baseline; gap: 10px; margin: 2px 0 12px; font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.result-figures .from { color: var(--color-text-muted); font-size: 15px; text-decoration: line-through; text-decoration-color: var(--color-border-strong); }
.result-figures .arrow { color: var(--color-text-muted); }
.result-figures .to { font-size: 24px; font-weight: 600; color: var(--color-text); }
.result-figures .pct { font-size: 13px; color: var(--color-ok); font-weight: 600; margin-left: 2px; }
.result-download {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px;
  border-radius: var(--radius);
  background: var(--color-accent);
  color: var(--color-accent-contrast) !important;
  font-weight: 600;
  text-decoration: none;
  transition: background-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.result-download:hover { background: var(--color-accent-hover); }
.result-download:active { transform: translateY(1px); }
.result-download svg { width: 16px; height: 16px; }

/* ---- privacy / DevTools info panel ---- */
.privacy-panel {
  margin: 20px 0 0;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface-2);
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 12px;
  align-items: start;
}
.privacy-panel .pp-icon { width: 22px; height: 22px; color: var(--color-ok); margin-top: 1px; }
.privacy-panel p { margin: 0; font-size: 14px; }
.privacy-panel .pp-title { font-weight: 600; margin-bottom: 2px; }
.privacy-panel .pp-body { color: var(--color-text-muted); }
.privacy-panel kbd {
  display: inline-block;
  padding: 1px 6px;
  border: 1px solid var(--color-border-strong);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  white-space: nowrap;
}
.privacy-panel .pp-steps { margin-top: 6px; }
.privacy-panel button.pp-check {
  margin-top: 10px;
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 600;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
}
.privacy-panel button.pp-check:hover:not(:disabled) { background: var(--color-surface); border-color: var(--color-text-muted); }
.privacy-panel .pp-verdict { margin-top: 8px; font-size: 13.5px; min-height: 1.3em; }
.privacy-panel .pp-verdict.ok { color: var(--color-ok); font-weight: 600; }

/* ---- notify ---- */
#notify { border-top: 1px solid var(--color-border); padding-top: 28px; margin-top: 36px; }
#notify p { color: var(--color-text-muted); margin: 0 0 14px; max-width: 60ch; }
#notify-form { display: flex; gap: 10px; }
#notify-form input[type="email"] {
  flex: 1; min-width: 0;
  padding: 12px 14px;
  font: inherit;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--t-fast) var(--ease);
}
#notify-form input[type="email"]:hover { border-color: var(--color-border-strong); }
#notify-form button { flex-shrink: 0; }
#notify-status { min-height: 1.4em; font-size: 14px; color: var(--color-text-muted); margin-top: 10px; }
#notify-status:not(:empty) { color: var(--color-text); }

/* ---- faq ---- */
#faq { margin-top: 36px; border-top: 1px solid var(--color-border); padding-top: 28px; }
#faq p { color: var(--color-text-muted); margin: 0 0 4px; }

footer {
  text-align: center;
  color: var(--color-text-muted);
  padding: 28px 20px;
  font-size: 13px;
  border-top: 1px solid var(--color-border);
  margin-top: 36px;
}
footer a { padding: 8px 2px; }

/* ---- motion preference ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}

/* ---- mobile ---- */
@media (max-width: 520px) {
  main { padding: 28px 16px 20px; }
  h1 { font-size: 27px; }
  #tool { padding: 18px; }
  #dropzone { padding: 26px 14px 24px; }
  #notify-form { flex-direction: column; align-items: stretch; }
  .field-row { flex-wrap: wrap; }
  #file-list .file-actions button { width: 40px; height: 40px; }
  .privacy-panel { grid-template-columns: 1fr; }
  .privacy-panel .pp-icon { display: none; }
}