/* =========================================================
   QuickToolBox — Design System
   Signature idea: tools are drawers in a toolbox. Each tool
   gets a colored "drawer tab" with a two-letter code (CM/RS/CV)
   and every measurement (file size, dimensions, %) is shown
   in a monospace "readout" style, like a instrument display.
   ========================================================= */

:root {
  /* ---- Color tokens ---- */
  --color-bg: #F6F7F3;
  --color-bg-alt: #ECEEE7;
  --color-surface: #FFFFFF;
  --color-ink: #14181F;
  --color-ink-soft: #565F6B;
  --color-ink-faint: #8A9099;
  --color-border: #DEE2D9;
  --color-border-strong: #C7CCC0;

  --color-blue: #2F5FED;      /* Compressor drawer */
  --color-blue-ink: #17348F;
  --color-teal: #0E9C86;      /* Resizer drawer */
  --color-teal-ink: #07584C;
  --color-violet: #6A4FD1;    /* Converter drawer */
  --color-violet-ink: #3D2C86;

  --color-success: #0E9C86;
  --color-danger: #C4392B;
  --color-danger-bg: #FBEAE7;
  --color-warning-bg: #FDF3E1;

  /* ---- Type ---- */
  --font-display: 'Space Grotesk', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

  /* ---- Layout ---- */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --max-width: 1120px;
  --shadow-card: 0 1px 2px rgba(20, 24, 31, 0.04), 0 6px 20px rgba(20, 24, 31, 0.05);
  --shadow-pop: 0 10px 30px rgba(20, 24, 31, 0.12);
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
button { font-family: inherit; cursor: pointer; }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  margin: 0 0 0.5em 0;
  letter-spacing: -0.01em;
}
p { margin: 0 0 1em 0; color: var(--color-ink-soft); }
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Visible focus states everywhere (accessibility) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-blue);
  outline-offset: 2px;
  border-radius: 4px;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-ink);
  color: #fff;
  padding: 10px 16px;
  z-index: 200;
  border-radius: 0 0 8px 0;
}
.skip-link:focus {
  left: 0;
}

/* ---- Header / Nav ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 247, 243, 0.92);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--color-ink);
}
.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--color-blue), var(--color-violet) 55%, var(--color-teal));
  display: grid;
  place-items: center;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-ink-soft);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--color-ink);
  background: var(--color-bg-alt);
}
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; align-items: center; gap: 8px; }
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    border-bottom: 1px solid var(--color-border);
    display: none;
  }
  .nav-links.is-open { display: flex; }
  .nav-links a { padding: 12px; }
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  text-decoration: none;
  transition: transform 0.05s ease, box-shadow 0.15s ease, background-color 0.15s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--color-ink);
  color: #fff;
}
.btn-primary:hover { background: #262E3A; }
.btn-accent-blue { background: var(--color-blue); color: #fff; }
.btn-accent-blue:hover { background: var(--color-blue-ink); }
.btn-accent-teal { background: var(--color-teal); color: #fff; }
.btn-accent-teal:hover { background: var(--color-teal-ink); }
.btn-accent-violet { background: var(--color-violet); color: #fff; }
.btn-accent-violet:hover { background: var(--color-violet-ink); }
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-ink);
  border-color: var(--color-border-strong);
}
.btn-secondary:hover { border-color: var(--color-ink); }
.btn-full { width: 100%; }
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ---- Hero ---- */
.hero {
  padding: 72px 0 48px;
  text-align: center;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  max-width: 16ch;
  margin: 0 auto 0.4em;
}
.hero .lede {
  font-size: 1.15rem;
  max-width: 46ch;
  margin: 0 auto;
  color: var(--color-ink-soft);
}

/* ---- Tool drawer cards (signature element) ---- */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 40px 0;
}
@media (max-width: 860px) {
  .tool-grid { grid-template-columns: 1fr; }
}

.drawer-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px 24px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-decoration: none;
  color: var(--color-ink);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.drawer-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-pop); }

.drawer-tab {
  position: absolute;
  top: -12px;
  left: 24px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #fff;
  padding: 5px 10px;
  border-radius: 999px;
}
.drawer-tab-cm { background: var(--color-blue); }
.drawer-tab-rs { background: var(--color-teal); }
.drawer-tab-cv { background: var(--color-violet); }

.drawer-card h3 { font-size: 1.25rem; margin-top: 6px; }
.drawer-card p { margin-bottom: 4px; }
.drawer-card .btn { margin-top: auto; }

/* ---- Sections ---- */
.section { padding: 56px 0; }
.section-alt { background: var(--color-bg-alt); }
.section-head { max-width: 60ch; margin-bottom: 28px; }
.section-head h2 { font-size: clamp(1.5rem, 3vw, 2rem); }

.privacy-note {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.privacy-note .icon {
  flex-shrink: 0;
  width: 42px; height: 42px;
  border-radius: 10px;
  background: var(--color-bg-alt);
  display: grid; place-items: center;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-teal-ink);
}

/* ---- Ad slots ---- */
.ad-slot {
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-bg-alt);
  color: var(--color-ink-faint);
  font-size: 0.78rem;
  font-family: var(--font-mono);
  text-align: center;
  padding: 14px;
  margin: 28px auto;
  max-width: var(--max-width);
}
.ad-slot-top { min-height: 90px; display: flex; align-items: center; justify-content: center; }
.ad-slot-content { min-height: 100px; display: flex; align-items: center; justify-content: center; }
.ad-slot-bottom { min-height: 90px; display: flex; align-items: center; justify-content: center; }

/* ---- Tool workspace (shared across the three tools) ---- */
.tool-page-head {
  padding: 40px 0 8px;
}
.tool-page-head .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  color: #fff;
  display: inline-block;
  margin-bottom: 14px;
}
.tool-page-head h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); max-width: 22ch; }
.tool-page-head .lede { max-width: 60ch; }

.workspace {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
  margin: 28px 0;
}

.dropzone {
  border: 2px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  padding: 40px 20px;
  text-align: center;
  background: var(--color-bg-alt);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}
.dropzone.is-dragover {
  border-color: var(--color-blue);
  background: #EEF2FF;
}
.dropzone p { margin: 0 0 12px; }
.dropzone .dz-icon {
  width: 46px; height: 46px;
  margin: 0 auto 14px;
  border-radius: 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  display: grid; place-items: center;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-ink-soft);
}
.file-input-visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.error-banner {
  display: none;
  align-items: flex-start;
  gap: 10px;
  background: var(--color-danger-bg);
  color: #7A2318;
  border: 1px solid #F0C4BC;
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-top: 16px;
  font-size: 0.92rem;
}
.error-banner.is-visible { display: flex; }

.tool-editor {
  display: none;
  margin-top: 24px;
  gap: 28px;
  grid-template-columns: 1.1fr 1fr;
}
.tool-editor.is-visible { display: grid; }
@media (max-width: 820px) {
  .tool-editor { grid-template-columns: 1fr; }
}

.preview-pane {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: repeating-conic-gradient(#F1F2ED 0% 25%, #FBFBF9 0% 50%) 50% / 20px 20px;
  display: grid;
  place-items: center;
  min-height: 260px;
  overflow: hidden;
  padding: 12px;
}
.preview-pane img { max-height: 380px; border-radius: 6px; }

.controls-pane { display: flex; flex-direction: column; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-ink);
}
.field .hint { font-size: 0.8rem; color: var(--color-ink-faint); }
input[type="range"] { width: 100%; accent-color: var(--color-blue); }
input[type="number"],
select {
  padding: 10px 12px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: var(--color-surface);
  color: var(--color-ink);
}

.readout-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
@media (max-width: 480px) { .readout-grid { grid-template-columns: 1fr; } }
.readout {
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}
.readout .label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-faint);
  font-weight: 600;
}
.readout .value {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-ink);
}
.readout .value.is-good { color: var(--color-teal-ink); }

.dimension-row {
  display: flex;
  align-items: flex-end;
  gap: 10px;
}
.dimension-row .field { flex: 1; }
.lock-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-ink-soft);
}
.lock-toggle input { accent-color: var(--color-blue); width: 16px; height: 16px; }

.action-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 6px;
}
.action-row .btn { flex: 1; min-width: 140px; }

.spinner {
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,0.5);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Privacy trust note (compact, under upload area) ---- */
.privacy-mini {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 14px;
  padding: 12px 14px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--color-ink-soft);
}
.privacy-mini strong { color: var(--color-ink); }

/* ---- Before / After comparison (Resizer V2) ---- */
.compare-section {
  display: none;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}
.compare-section.is-visible { display: block; }

.compare-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--color-teal-ink);
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 720px) {
  .compare-grid { grid-template-columns: 1fr; }
}

.compare-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  background: var(--color-bg-alt);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.compare-card-after {
  background: var(--color-surface);
  border-color: var(--color-teal);
  box-shadow: var(--shadow-card);
}

.compare-card-header { display: flex; }
.compare-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  color: #fff;
}
.compare-badge-before { background: var(--color-ink-faint); }
.compare-badge-after { background: var(--color-teal); }

.compare-image-wrap {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: repeating-conic-gradient(#F1F2ED 0% 25%, #FBFBF9 0% 50%) 50% / 20px 20px;
  display: grid;
  place-items: center;
  min-height: 160px;
  overflow: hidden;
  padding: 8px;
}
.compare-image-wrap img { max-height: 220px; border-radius: 4px; }

.compare-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.compare-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.compare-stat .label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-faint);
  font-weight: 600;
}
.compare-stat .value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-ink);
}
.compare-stat .value.is-good { color: var(--color-teal-ink); }

/* ---- How-it-works / steps ---- */
.steps-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 760px) { .steps-list { grid-template-columns: 1fr; } }
.step {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}
.step .step-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-ink-faint);
  font-weight: 700;
  margin-bottom: 6px;
}

/* ---- FAQ ---- */
.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
}
.faq-item h3 { font-size: 1.02rem; margin-bottom: 6px; }
.faq-item p { margin-bottom: 0; }

/* ---- Generic content pages (about/contact/privacy/terms) ---- */
.prose { max-width: 74ch; }
.prose h2 { margin-top: 1.6em; font-size: 1.35rem; }
.prose ul { color: var(--color-ink-soft); padding-left: 1.2em; }
.prose li { margin-bottom: 0.4em; }

.contact-form {
  display: grid;
  gap: 16px;
  max-width: 560px;
}
.contact-form textarea {
  padding: 10px 12px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  min-height: 140px;
  resize: vertical;
}
.form-note {
  font-size: 0.85rem;
  color: var(--color-ink-faint);
}
.form-success {
  display: none;
  background: var(--color-warning-bg);
  border: 1px solid #EFD9A6;
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 0.9rem;
}
.form-success.is-visible { display: block; }

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  padding: 40px 0 28px;
  margin-top: 60px;
}
.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 32px;
}
.footer-brand { max-width: 320px; }
.footer-brand .brand { margin-bottom: 10px; }
.footer-links {
  list-style: none;
  margin: 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(2, auto);
  gap: 8px 32px;
}
.footer-links a { text-decoration: none; color: var(--color-ink-soft); font-size: 0.92rem; }
.footer-links a:hover { color: var(--color-ink); text-decoration: underline; }
.footer-bottom {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border-strong);
  font-size: 0.82rem;
  color: var(--color-ink-faint);
}

/* ---- Analytics placeholder marker (visual only in dev, harmless) ---- */
.analytics-slot { display: none; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
  html { scroll-behavior: auto; }
}