/* Shared visual language. Tool behavior remains in style.css and js/*.js. */
:root {
  color-scheme: light dark;
  --color-bg: #f5f6f5;
  --color-accent: #116b5d;
  --color-accent-dark: #0b5045;
  --color-accent-soft: #e8f2ee;
  --color-border: #dde4e0;
  --color-border-strong: #9db9ad;
  --color-text: #202b27;
  --color-text-secondary: #64716b;
  --color-surface: #ffffff;
  --color-surface-subtle: #f6f8f7;
  --color-aside-bg: #eaf0ec;
  --color-warning-bg: #fff8e5;
  --color-warning-text: #9a6700;
  --color-error-text: #d70015;
  --color-on-accent: #ffffff;
  --color-chip-blue-bg: #edf3fa;
  --color-chip-blue-fg: #365b82;
  --color-chip-orange-bg: #fbf0e8;
  --color-chip-orange-fg: #96542e;
  --color-chip-purple-bg: #f0edf8;
  --color-chip-purple-fg: #69548c;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #15191a;
    --color-accent: #34d1b8;
    --color-accent-dark: #5eebd4;
    --color-accent-soft: #123832;
    --color-border: #313d38;
    --color-border-strong: #3a4b44;
    --color-text: #e8ebe9;
    --color-text-secondary: #9aa39d;
    --color-surface: #1b2220;
    --color-surface-subtle: #212a27;
    --color-aside-bg: #1e2b26;
    --color-warning-bg: #3a2f10;
    --color-warning-text: #e8b84b;
    --color-error-text: #ff6b6b;
    --color-on-accent: #0c1210;
    --color-chip-blue-bg: #1a2733;
    --color-chip-blue-fg: #82b3e0;
    --color-chip-orange-bg: #2e2318;
    --color-chip-orange-fg: #e2a878;
    --color-chip-purple-bg: #241f33;
    --color-chip-purple-fg: #b6a0da;
  }

  .guide-card:hover, .upload-area:hover, .upload-area:focus-within {
    box-shadow: none;
  }
}
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { font-size: 16px; line-height: 1.75; letter-spacing: -.025em; word-break: keep-all; overflow-wrap: anywhere; }
a { color: var(--color-accent); text-underline-offset: 4px; }
button, input, select { font: inherit; }
button, .btn, input, select, summary, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid #19786b; outline-offset: 4px; }
button:disabled { opacity: .55; cursor: not-allowed; }
.skip-link { position: absolute; top: -100px; left: 20px; z-index: 20; background: var(--color-surface); padding: 12px 20px; }
.skip-link:focus { top: 12px; }
.site-header { background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
.header-inner { max-width: 1160px; margin: auto; padding: 0 28px; min-height: 84px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.site-brand { display: inline-flex; align-items: center; gap: 10px; color: var(--color-text); text-decoration: none; font-size: 20px; font-weight: 750; letter-spacing: -.7px; white-space: nowrap; }
.brand-mark { width: 32px; height: 32px; flex: none; color: var(--color-accent); }
.site-nav { display: flex; gap: 6px; align-items: center; }
.site-nav a { color: var(--color-text-secondary); text-decoration: none; font-size: 14px; font-weight: 600; padding: 9px 15px; border-radius: 6px; white-space: nowrap; }
.site-nav a:hover { color: var(--color-accent); background: var(--color-surface-subtle); }
.site-nav a[aria-current="page"] { color: var(--color-accent); background: var(--color-accent-soft); }
.container { max-width: 1100px; padding: 52px 28px 80px; }
h1, h2, h3 { color: var(--color-text); line-height: 1.35; letter-spacing: -.045em; }
h1 { display: block; border: 0; padding: 0; font-size: clamp(30px, 3.5vw, 46px); font-weight: 750; margin: 14px 0 18px; }
.subtitle { color: var(--color-text-secondary); line-height: 1.8; margin: 0 0 28px; max-width: 710px; font-size: 16px; }
.eyebrow { display: flex; align-items: center; gap: 9px; color: var(--color-accent); font-size: 11px; font-weight: 750; letter-spacing: .14em; margin: 0 0 12px; }
.eyebrow::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.page-tool .container > h1 { font-size: clamp(34px, 4.2vw, 52px); line-height: 1.25; }
.page-tool .container > .subtitle { margin-bottom: 32px; }
.tool-intro-grid { display: grid; grid-template-columns: minmax(0, 1fr) 270px; gap: 24px; margin: 0 0 24px; align-items: stretch; }
.upload-area { background: var(--color-surface); min-height: 270px; border: 1.5px dashed var(--color-border-strong); border-radius: 12px; box-shadow: none; padding: 30px 24px; margin: 0 0 24px; }
.tool-intro-grid .upload-area { margin-bottom: 0; min-height: 310px; }
.upload-area:hover, .upload-area:focus-within { border-color: var(--color-accent); background: var(--color-surface-subtle); }
.upload-area.drag-over { background: var(--color-accent-soft); }
.upload-icon { width: 34px; height: 34px; margin: 0 0 12px; }
.upload-heading { font-size: 19px; font-weight: 650; margin: 0 0 18px; }
button, #downloadBtn, .btn { background: var(--color-accent); border-radius: 7px; font-weight: 600; min-height: 44px; padding: 10px 22px; line-height: 1.5; transition: background-color .15s, box-shadow .15s; }
.btn-outline { background: transparent; color: var(--color-accent); border: 1.5px solid var(--color-accent); }
.btn-outline:hover { background: var(--color-accent-soft); }
.result-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.share-status { font-size: 13px; color: var(--color-accent-dark); margin: 8px 0 0; }
.upload-btn { border-radius: 7px; padding: 13px 30px; margin-bottom: 12px; font-size: 15px; }
.upload-hint { font-size: 13px; }
.upload-formats { font-size: 11px; margin-top: 16px; color: var(--color-text-secondary); }
.tool-aside { background: var(--color-aside-bg); border: 1px solid var(--color-border); border-radius: 12px; padding: 26px; }
.tool-aside h2 { font-size: 18px; margin: 12px 0; }
.tool-aside p { font-size: 13px; color: var(--color-text-secondary); margin: 0 0 20px; }
.tool-aside .aside-label { color: var(--color-text); font-size: 10px; letter-spacing: .12em; font-weight: 700; }
.tool-aside ul { padding: 16px 0 0; margin: 0; list-style: none; border-top: 1px solid var(--color-border); }
.tool-aside li { display: flex; gap: 9px; font-size: 12px; color: var(--color-text-secondary); margin-top: 8px; }
.tool-aside li::before { content: '✓'; color: var(--color-accent); }
.controls, .preview-area { padding: 28px; border: 1px solid var(--color-border); box-shadow: none; border-radius: 12px; margin-bottom: 24px; }
.controls input[type="range"] { accent-color: var(--color-accent); cursor: pointer; }
.controls input[type="checkbox"], .controls input[type="radio"] { accent-color: var(--color-accent); width: 16px; height: 16px; }
.controls label, .controls .resize-label, .controls .checkbox-label, .controls .radio-label { font-size: 14px; }
.resize-label input[type="number"] { width: 120px; min-height: 44px; background: var(--color-surface-subtle); }
select, #formatSelect { min-height: 44px; border: 1px solid var(--color-border); border-radius: 7px; background: var(--color-surface); padding: 8px 12px; }
.preview-box { min-width: min(240px, 100%); }
.preview-box h2 { font-size: 15px; margin: 0 0 18px; }
.preview-box p { font-size: 13px; color: var(--color-text-secondary); }
.preview-box img { height: auto; }
.offline-badge { font-size: 12px; margin: 12px 0 0; }
.info-section { padding: 28px 30px; border: 1px solid var(--color-border); box-shadow: none; border-radius: 10px; margin-bottom: 22px; }
.info-section h2 { font-size: 20px; margin-bottom: 16px; }
.info-section p, .info-section li { color: var(--color-text-secondary); font-size: 15px; line-height: 1.95; }
.info-section strong { color: var(--color-text); }
.info-section details { padding: 16px 0; }
.info-section summary { font-size: 15px; }
.info-section details[open] { background: transparent; }
.info-section summary + p { padding-left: 18px; }
.tool-nav { margin-bottom: 20px; }
.tool-nav a { font-size: 13px; }
.page-article .container { max-width: 840px; }
.page-article h1 { font-size: clamp(28px, 3.3vw, 38px); line-height: 1.5; }
.page-article .info-section { padding: 30px; }
.guide-image img { height: auto; }
.guide-image figcaption { line-height: 1.7; font-size: 12px; }
.pdf-section { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 12px; padding: 28px; margin: 0 0 24px; }
.pdf-section > h2 { margin: 0 0 14px; font-size: 22px; }
.pdf-section .upload-area { min-height: 240px; background: var(--color-surface-subtle); }
.pdf-section .controls { background: var(--color-surface-subtle); }
.pdf-page-list { gap: 12px; }
.pdf-page-item { border: 1px solid var(--color-border); box-shadow: none; }
.page-guide .container { max-width: 1100px; }
.page-guide .info-section { background: transparent; border: 0; padding: 16px 0; margin: 0 0 26px; }
.guide-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.guide-card { position: relative; display: flex; flex-direction: column; align-items: flex-start; text-decoration: none; color: inherit; padding: 24px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 10px; transition: border-color .15s, box-shadow .15s; }
.guide-card:hover { border-color: var(--color-border-strong); box-shadow: 0 4px 16px #19362a08; }
.guide-card[hidden] { display: none; }
.guide-search { margin: 0 0 22px; max-width: 420px; }
.guide-search input[type="search"] { width: 100%; min-height: 44px; border: 1px solid var(--color-border); border-radius: 7px; background: var(--color-surface); padding: 8px 14px; font-size: 15px; }
.card-category { color: var(--color-accent); font-size: 11px; font-weight: 650; margin-bottom: 14px; }
.card-title { font-size: 18px; margin: 0 0 12px; line-height: 1.5; }
.guide-card .card-description { font-size: 13px; color: var(--color-text-secondary); line-height: 1.8; margin: 0 0 20px; }
.card-arrow { margin-top: auto; color: var(--color-accent); font-size: 20px; }
.category-nav { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 38px; }
.category-nav a { border: 1px solid var(--color-border); background: var(--color-surface); padding: 8px 16px; border-radius: 6px; font-size: 13px; text-decoration: none; }
.site-footer { background: var(--color-surface); border-top: 1px solid var(--color-border); padding: 32px 28px; text-align: left; }
.footer-inner { max-width: 1044px; margin: auto; display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.footer-brand { font-weight: 750; font-size: 16px; color: var(--color-text); }
.footer-note { font-size: 12px; margin: 5px 0 0; color: var(--color-text-secondary); }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.site-footer a { margin: 0; font-size: 12px; }
@media (max-width: 900px) {
  .header-inner { padding: 16px 24px; flex-wrap: wrap; gap: 12px; }
  .site-nav { gap: 2px; }
  .site-nav a { padding: 7px 10px; }
  .tool-intro-grid { grid-template-columns: minmax(0, 1fr) 230px; gap: 16px; }
  .guide-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 600px) {
  .header-inner { padding: 16px 20px 12px; gap: 14px; }
  .site-brand { font-size: 18px; }
  .brand-mark { width: 28px; height: 28px; }
  .site-nav { width: 100%; justify-content: space-between; }
  .site-nav a { font-size: 12px; padding: 7px 8px; }
  .container { padding: 32px 20px 48px; }
  .subtitle { font-size: 14px; }
  .tool-intro-grid { display: flex; flex-direction: column; }
  .tool-intro-grid .upload-area { min-height: 290px; }
  .tool-aside { padding: 20px; }
  .tool-aside h2 { margin: 6px 0 8px; font-size: 17px; }
  .tool-aside p { margin-bottom: 12px; }
  .tool-aside ul { display: flex; flex-wrap: wrap; gap: 6px 16px; padding-top: 10px; }
  .tool-aside li { margin: 0; }
  .info-section, .page-article .info-section, .controls, .preview-area, .pdf-section { padding: 22px 20px; }
  .info-section p, .info-section li { font-size: 14px; }
  .pdf-section .upload-area { padding: 24px 12px; }
  .guide-grid { grid-template-columns: 1fr; }
  .guide-card { padding: 24px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-links { gap: 20px; }
  table { font-size: 12px; overflow-wrap: anywhere; word-break: normal; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

/* Compact home and illustrated guide cards. */
.page-compress .container { padding-top: 28px; }
.page-compress .container > h1 { font-size: clamp(28px, 3.2vw, 40px); margin: 8px 0 10px; }
.page-compress .eyebrow { margin-bottom: 6px; }
.page-compress .container > .subtitle { margin-bottom: 22px; }
.page-compress .tool-intro-grid { grid-template-columns: minmax(0, 1fr) 320px; gap: 20px; margin-bottom: 12px; }
.page-compress .tool-intro-grid .upload-area { min-height: 270px; padding: 24px; }
.compression-example { padding: 22px; border: 1px solid var(--color-border); border-radius: 12px; background: var(--color-accent-soft); }
.example-label { font-size: 12px; font-weight: 700; color: var(--color-accent); }
.compression-example h2 { font-size: 19px; margin: 6px 0 18px; }
.example-sizes { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.example-sizes div { display: flex; flex-direction: column; gap: 3px; }
.example-sizes span { font-size: 12px; color: var(--color-text-secondary); }
.example-sizes strong { font-size: 28px; line-height: 1.3; letter-spacing: -.04em; }
.example-sizes div:last-child strong { color: var(--color-accent); }
.example-sizes small { font-size: 14px; }
.compression-example .example-saving { display: inline-block; margin: 12px 0 8px; padding: 3px 10px; border-radius: 5px; background: var(--color-surface); color: var(--color-accent); font-size: 13px; font-weight: 700; }
.compression-example .example-caption { margin: 0 0 10px; font-size: 12px; line-height: 1.7; color: var(--color-text-secondary); }
.compression-example > a { font-size: 12px; font-weight: 600; }
.privacy-strip { margin: 0 0 26px; font-size: 12px; color: var(--color-text-secondary); }
.page-guide .container { padding-top: 30px; }
.page-guide .category-nav { margin-bottom: 20px; }
.page-guide .guide-card { padding: 0 20px 18px; overflow: hidden; }
.card-visual { align-self: stretch; margin: 0 -20px 18px; height: 144px; background: var(--color-accent-soft); border-bottom: 1px solid var(--color-border); overflow: hidden; }
.card-visual img { display: block; width: 100%; height: 100%; object-fit: contain; padding: 10px; box-sizing: border-box; }
.card-illustration { display: flex; align-items: center; justify-content: center; gap: 18px; color: var(--color-accent); }
.card-illustration svg { width: 80px; height: 80px; flex: none; }
.card-illustration span { font-size: 16px; font-weight: 700; }
.illustration-mail, .illustration-cloud { background: var(--color-chip-blue-bg); color: var(--color-chip-blue-fg); }
.illustration-video, .illustration-sizes { background: var(--color-chip-orange-bg); color: var(--color-chip-orange-fg); }
.illustration-document, .illustration-print { background: var(--color-chip-purple-bg); color: var(--color-chip-purple-fg); }
.page-guide .card-category { margin-bottom: 8px; }
.page-guide .card-title { font-size: 17px; margin-bottom: 10px; }
.page-guide .guide-card .card-description { font-size: 13px; line-height: 1.7; margin-bottom: 12px; }
@media (max-width: 700px) {
 .page-compress .tool-intro-grid { display: flex; flex-direction: column; }
 .page-compress .container { padding-top: 24px; }
 .page-compress .tool-intro-grid .upload-area { min-height: 240px; }
 .compression-example { padding: 20px; }
 .example-sizes { justify-content: flex-start; gap: 24px; }
 .card-visual { height: 160px; }
}

/* Keep examples out of the active editing flow. */
.page-compress:has(#controls:not([hidden])) .compression-example { display: none; }
.page-compress:has(#controls:not([hidden])) .tool-intro-grid { grid-template-columns: minmax(0, 1fr); }
.page-compress:has(#controls:not([hidden])) .tool-intro-grid .upload-area { min-height: 0; padding: 16px 20px; }
.page-compress:has(#controls:not([hidden])) .upload-icon,
.page-compress:has(#controls:not([hidden])) .upload-hint { display: none; }
.page-compress:has(#controls:not([hidden])) .upload-heading { font-size: 15px; margin-bottom: 8px; }
.page-compress:has(#controls:not([hidden])) .upload-btn { padding: 8px 20px; margin-bottom: 4px; }
.page-compress:has(#controls:not([hidden])) .upload-formats { margin-top: 4px; }
.page-guide #compression .card-illustration { background: var(--color-chip-blue-bg); color: var(--color-chip-blue-fg); }
.page-guide #pdf-workflows .card-illustration { background: var(--color-chip-purple-bg); color: var(--color-chip-purple-fg); }
.page-guide #resolution .card-illustration { background: var(--color-accent-soft); color: var(--color-accent); }

/* Selected file summary and result savings. */
.page-compress .tool-intro-grid .upload-area.has-file { display: flex; flex-direction: row; justify-content: space-between; align-items: center; gap: 12px; }
.page-compress .upload-area.has-file .upload-heading { min-width: 0; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; margin: 0; text-align: left; }
.page-compress .upload-area.has-file .upload-btn { flex: none; margin: 0; font-size: 13px; padding: 8px 12px; }
.page-compress .upload-area.has-file .upload-formats { display: none; }
.preview-box .compression-savings { font-size: 16px; font-weight: 700; color: var(--color-accent); background: var(--color-accent-soft); padding: 10px 14px; border-radius: 6px; }
.preview-box .compression-savings.size-increased { color: var(--color-warning-text); background: var(--color-warning-bg); }
.page-guide .card-visual { margin-bottom: 16px; }