/* ============================================================
   YourMiniTools — Global Stylesheet v2.0.0
   Design System: Soft Pastel Flat Modern
   Constraints: Self-hosted fonts, no unsafe-inline, WCAG 2.2 AA
   ============================================================ */

/* --- Self-hosted Inter Variable ----------------------------- */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('/assets/fonts/InterVariable.woff2?v=2.0.0') format('woff2-variations'),
       url('/assets/fonts/InterVariable.woff2?v=2.0.0') format('woff2');
}

/* --- Reset -------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  hanging-punctuation: first last;
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'cv11', 'ss01', 'ss03';
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
  line-height: 1.2;
  letter-spacing: -0.015em;
}

p {
  overflow-wrap: break-word;
}

table {
  border-collapse: collapse;
}

/* --- Design Tokens ------------------------------------------ */
:root {
  /* Palette — Light Mode (soft warm neutrals) */
  --color-bg:            #f6f7fb;
  --color-surface:       #ffffff;
  --color-surface-soft:  #f1f3f9;
  --color-text:          #1c2030;
  --color-text-muted:    #6b7185;
  --color-text-subtle:   #9aa0b3;

  /* Default brand (soft indigo) */
  --color-primary:       #6471dc;
  --color-primary-hover: #5460cf;

  /* Semantic accents (kept for compat) */
  --color-success:       #4cb88a;
  --color-success-hover: #3fa67a;
  --color-danger:        #c0392b;
  --color-danger-hover:  #a93226;
  --color-warning:       #e8b257;

  /* Borders & Dividers */
  --color-border:        #e5e7ef;
  --color-border-soft:   #eef0f6;
  --color-border-focus:  var(--accent, var(--color-primary));

  /* Per-tool accent system (overridden by [data-tool-color]) */
  --accent:              var(--color-primary);
  --accent-hover:        var(--color-primary-hover);
  --accent-soft:         color-mix(in srgb, var(--accent) 12%, var(--color-surface));
  --accent-softer:       color-mix(in srgb, var(--accent) 6%, var(--color-surface));
  --accent-strong:       color-mix(in srgb, var(--accent) 85%, #000);
  --accent-ring:         color-mix(in srgb, var(--accent) 25%, transparent);
  --accent-tint:         color-mix(in srgb, var(--accent) 18%, transparent);

  /* Elevation — soft, slightly cool */
  --shadow-sm:           0 1px 2px rgba(28, 32, 48, 0.04);
  --shadow-card:         0 2px 8px rgba(28, 32, 48, 0.06),
                         0 1px 3px rgba(28, 32, 48, 0.04);
  --shadow-card-hover:   0 8px 24px rgba(28, 32, 48, 0.08),
                         0 2px 6px rgba(28, 32, 48, 0.04);
  --shadow-card-accent:  0 12px 28px -8px var(--accent-ring),
                         0 2px 6px rgba(28, 32, 48, 0.05);
  --shadow-header:       0 1px 0 var(--color-border-soft);
  --shadow-pop:          0 12px 32px rgba(28, 32, 48, 0.12);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
                  'Helvetica Neue', Arial,
                  'Noto Sans SC', 'Microsoft YaHei',
                  'Noto Sans', sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* Spacing scale (4px base) */
  --spacing-xs:  0.25rem;
  --spacing-sm:  0.5rem;
  --spacing-md:  1rem;
  --spacing-lg:  1.5rem;
  --spacing-xl:  2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Radii */
  --radius-sm:   8px;
  --radius-md:   14px;
  --radius-lg:   20px;
  --radius-xl:   28px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast:   150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 240ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:   400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --header-height: 64px;
  --max-width:     1180px;
  --content-pad:   var(--spacing-lg);
}

/* --- Dark Mode: system preference --------------------------- */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg:           #0e1018;
    --color-surface:      #171a26;
    --color-surface-soft: #1f2333;
    --color-text:         #e9eaf0;
    --color-text-muted:   #9aa1b8;
    --color-text-subtle:  #6c7390;
    --color-border:       #262a3d;
    --color-border-soft:  #1f2333;
    --shadow-sm:          0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-card:        0 2px 10px rgba(0, 0, 0, 0.25),
                          0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-card-hover:  0 10px 28px rgba(0, 0, 0, 0.4),
                          0 2px 6px rgba(0, 0, 0, 0.25);
    --shadow-card-accent: 0 14px 32px -8px var(--accent-ring),
                          0 2px 6px rgba(0, 0, 0, 0.3);
    --shadow-header:      0 1px 0 rgba(255, 255, 255, 0.04);
    --shadow-pop:         0 14px 36px rgba(0, 0, 0, 0.5);
  }
}

[data-theme="dark"] {
  --color-bg:           #0e1018;
  --color-surface:      #171a26;
  --color-surface-soft: #1f2333;
  --color-text:         #e9eaf0;
  --color-text-muted:   #9aa1b8;
  --color-text-subtle:  #6c7390;
  --color-border:       #262a3d;
  --color-border-soft:  #1f2333;
  --shadow-sm:          0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-card:        0 2px 10px rgba(0, 0, 0, 0.25),
                        0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-card-hover:  0 10px 28px rgba(0, 0, 0, 0.4),
                        0 2px 6px rgba(0, 0, 0, 0.25);
  --shadow-card-accent: 0 14px 32px -8px var(--accent-ring),
                        0 2px 6px rgba(0, 0, 0, 0.3);
  --shadow-header:      0 1px 0 rgba(255, 255, 255, 0.04);
  --shadow-pop:         0 14px 36px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] {
  --color-bg:           #f6f7fb;
  --color-surface:      #ffffff;
  --color-surface-soft: #f1f3f9;
  --color-text:         #1c2030;
  --color-text-muted:   #6b7185;
  --color-text-subtle:  #9aa0b3;
  --color-border:       #e5e7ef;
  --color-border-soft:  #eef0f6;
  --shadow-sm:          0 1px 2px rgba(28, 32, 48, 0.04);
  --shadow-card:        0 2px 8px rgba(28, 32, 48, 0.06),
                        0 1px 3px rgba(28, 32, 48, 0.04);
  --shadow-card-hover:  0 8px 24px rgba(28, 32, 48, 0.08),
                        0 2px 6px rgba(28, 32, 48, 0.04);
  --shadow-card-accent: 0 12px 28px -8px var(--accent-ring),
                        0 2px 6px rgba(28, 32, 48, 0.05);
  --shadow-header:      0 1px 0 var(--color-border-soft);
  --shadow-pop:         0 12px 32px rgba(28, 32, 48, 0.12);
}

/* --- Per-tool accent palette (12 pastel hues) --------------- */
[data-tool-color="violet"]  { --accent: #6f64d3; --accent-hover: #5d51c5; }
[data-tool-color="peach"]   { --accent: #c46638; --accent-hover: #b0572b; }
[data-tool-color="teal"]    { --accent: #1f8a84; --accent-hover: #18726d; }
[data-tool-color="sky"]     { --accent: #2d7ebc; --accent-hover: #226b9f; }
[data-tool-color="sage"]    { --accent: #378652; --accent-hover: #2c7043; }
[data-tool-color="pink"]    { --accent: #be4869; --accent-hover: #a83a57; }
[data-tool-color="slate"]   { --accent: #5569b3; --accent-hover: #45579d; }
[data-tool-color="amber"]   { --accent: #8c5b0b; --accent-hover: #764b07; }
[data-tool-color="fuchsia"] { --accent: #a34cae; --accent-hover: #8f3d9a; }
[data-tool-color="coral"]   { --accent: #c44f3b; --accent-hover: #ad402d; }
[data-tool-color="cyan"]    { --accent: #1e839c; --accent-hover: #166f85; }
[data-tool-color="emerald"] { --accent: #2a8a5f; --accent-hover: #21734f; }

/* --- Base --------------------------------------------------- */
body {
  font-family: var(--font-primary);
  font-size: 16px;
  color: var(--color-text);
  background-color: var(--color-bg);
  padding-top: var(--header-height);
  display: flex;
  flex-direction: column;
  position: relative;
}

/* Subtle dotted backdrop, very faint, only on light mode */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: radial-gradient(circle at 1px 1px, color-mix(in srgb, var(--color-text) 5%, transparent) 1px, transparent 0);
  background-size: 28px 28px;
  opacity: 0.5;
  pointer-events: none;
}

::selection {
  background: var(--accent-tint);
  color: var(--color-text);
}

/* --- Skip Link ---------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--spacing-md);
  z-index: 1000;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--accent);
  color: #fff;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  font-weight: 600;
  font-size: 0.875rem;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

/* --- Header ------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  min-height: var(--header-height);
  background: color-mix(in srgb, var(--color-surface) 80%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--color-border-soft);
  display: flex;
  align-items: center;
}

.header-inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.site-logo:hover {
  color: var(--color-primary);
}

.site-logo:active {
  transform: scale(0.97);
}

.site-logo-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  color: #fff;
  background: linear-gradient(135deg, #6471dc 0%, #8378e2 100%);
  padding: 6px;
  border-radius: 9px;
  box-shadow: 0 2px 6px rgba(100, 113, 220, 0.3);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: color var(--transition-fast),
              background-color var(--transition-fast),
              transform var(--transition-fast);
  flex-shrink: 0;
}

.theme-toggle:hover {
  color: var(--color-primary);
  background: var(--color-surface-soft);
}

.theme-toggle:active {
  transform: scale(0.92);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  display: none;
}

.theme-toggle .icon-moon {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}
[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-moon {
    display: none;
  }
  :root:not([data-theme="light"]) .theme-toggle .icon-sun {
    display: block;
  }
}

/* Language Selector */
.lang-select {
  appearance: none;
  -webkit-appearance: none;
  background: var(--color-surface-soft);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.6rem;
  font-size: 0.8125rem;
  font-weight: 500;
  font-family: var(--font-primary);
  color: var(--color-text);
  cursor: pointer;
  min-height: 36px;
  min-width: 36px;
  transition: border-color var(--transition-fast),
              background-color var(--transition-fast),
              color var(--transition-fast);
  flex-shrink: 0;
}

.lang-select:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.lang-select:focus-visible {
  outline: 3px solid var(--accent-ring);
  outline-offset: 2px;
}

@media (max-width: 479px) {
  .lang-select {
    appearance: auto;
    -webkit-appearance: menulist;
    font-size: 1rem;
    padding: 0.25rem 0.375rem;
    min-height: 32px;
  }
}

/* --- Main Content ------------------------------------------- */
.site-main,
.main-content {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--content-pad);
}

/* --- Homepage Hero ------------------------------------------ */
.hero {
  text-align: center;
  padding: var(--spacing-2xl) 0 var(--spacing-2xl);
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.35rem 0.85rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.hero-badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-success) 25%, transparent);
}

.hero-title {
  font-size: clamp(2rem, 5.5vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  line-height: 1.05;
}

.hero-title-accent {
  background-image: linear-gradient(120deg, #6471dc 0%, #8378e2 50%, #cc83d4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.1875rem);
  color: var(--color-text-muted);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.55;
  font-weight: 400;
}

/* --- Tool Grid (Homepage) ----------------------------------- */
.tools-grid {
  display: grid;
  gap: var(--spacing-lg);
  grid-template-columns: 1fr;
  margin-top: var(--spacing-lg);
}

@media (min-width: 520px) {
  .tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 820px) {
  .tools-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1080px) {
  .tools-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* --- Tool Card (Homepage) ----------------------------------- */
.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  text-decoration: none;
  text-align: left;
  transition: box-shadow var(--transition-normal),
              transform var(--transition-normal),
              border-color var(--transition-normal);
  min-height: 180px;
  overflow: hidden;
  isolation: isolate;
}

/* Decorative tinted blob behind the icon */
.tool-card::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 140px;
  height: 140px;
  background: var(--accent-soft);
  border-radius: 50%;
  z-index: -1;
  opacity: 0;
  transform: scale(0.6);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.tool-card:hover {
  box-shadow: var(--shadow-card-accent);
  transform: translateY(-3px);
  border-color: var(--accent);
}

.tool-card:hover::before {
  opacity: 0.85;
  transform: scale(1);
}

.tool-card:focus-visible {
  outline: 3px solid var(--accent-ring);
  outline-offset: 2px;
}

.tool-card:active {
  transform: translateY(-1px);
}

.tool-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-xs);
  transition: transform var(--transition-normal),
              background-color var(--transition-fast);
}

.tool-card-icon svg {
  width: 24px;
  height: 24px;
}

.tool-card:hover .tool-card-icon {
  transform: scale(1.08) rotate(-3deg);
}

.tool-card-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.tool-card-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.45;
}

.tool-card-arrow {
  position: absolute;
  bottom: var(--spacing-md);
  right: var(--spacing-md);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: var(--radius-full);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.tool-card-arrow svg {
  width: 14px;
  height: 14px;
}

.tool-card:hover .tool-card-arrow {
  opacity: 1;
  transform: translateX(0);
}

@media (prefers-reduced-motion: reduce) {
  .tool-card,
  .tool-card-icon,
  .tool-card::before,
  .tool-card-arrow {
    transition: none;
  }
  .tool-card:hover {
    transform: none;
  }
  .tool-card:hover .tool-card-icon {
    transform: none;
  }
  .tool-card:hover::before {
    opacity: 0.6;
    transform: scale(1);
  }
}

/* --- Footer ------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--color-border-soft);
  background: var(--color-surface);
  padding: var(--spacing-xl) var(--content-pad);
  margin-top: var(--spacing-3xl);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  text-align: center;
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* --- Back to Top -------------------------------------------- */
.back-to-top {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 50;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  color: var(--accent);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-pop);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px) scale(0.9);
  transition: opacity var(--transition-normal),
              visibility var(--transition-normal),
              transform var(--transition-normal),
              background-color var(--transition-fast),
              color var(--transition-fast);
}

.back-to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.back-to-top:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.back-to-top svg {
  width: 18px;
  height: 18px;
}

/* --- Buttons ------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.65rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: var(--font-primary);
  line-height: 1;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
  white-space: nowrap;
  min-height: 44px;
  min-width: 44px;
  text-decoration: none;
  letter-spacing: -0.005em;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 1px 2px color-mix(in srgb, var(--accent) 40%, transparent),
              0 4px 12px -4px color-mix(in srgb, var(--accent) 50%, transparent);
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: 0 2px 4px color-mix(in srgb, var(--accent) 40%, transparent),
              0 6px 16px -4px color-mix(in srgb, var(--accent) 55%, transparent);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-softer);
}

.btn-success {
  background: var(--color-success);
  color: #fff;
  border-color: var(--color-success);
}

.btn-success:hover {
  background: var(--color-success-hover);
  border-color: var(--color-success-hover);
}

.btn-danger {
  background: var(--color-danger);
  color: #fff;
  border-color: var(--color-danger);
}

.btn-danger:hover {
  background: var(--color-danger-hover);
  border-color: var(--color-danger-hover);
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8125rem;
  min-height: 36px;
}

.btn-icon {
  padding: 0.5rem;
  border-radius: var(--radius-full);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* --- Notification Toast ------------------------------------- */
.notification-container {
  position: fixed;
  top: calc(var(--header-height) + var(--spacing-md));
  right: var(--spacing-md);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  pointer-events: none;
  max-width: min(400px, calc(100vw - 2 * var(--spacing-md)));
}

.notification {
  pointer-events: auto;
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-pop);
  font-size: 0.875rem;
  line-height: 1.4;
  transform: translateX(110%);
  opacity: 0;
  transition: transform var(--transition-normal),
              opacity var(--transition-normal);
}

.notification[data-visible="true"] {
  transform: translateX(0);
  opacity: 1;
}

.notification[data-type="success"] {
  border-left: 3px solid var(--color-success);
}

.notification[data-type="error"] {
  border-left: 3px solid var(--color-danger);
}

.notification[data-type="warning"] {
  border-left: 3px solid var(--color-warning);
}

.notification[data-type="info"] {
  border-left: 3px solid var(--color-primary);
}

.notification-message {
  flex: 1;
}

.notification-close {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  transition: color var(--transition-fast),
              background-color var(--transition-fast);
}

.notification-close:hover {
  color: var(--color-text);
  background: var(--color-surface-soft);
}

/* --- Utility Classes ---------------------------------------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-pad);
}

.text-center { text-align: center; }
.text-muted  { color: var(--color-text-muted); }
.font-mono   { font-family: var(--font-mono); }

/* --- Focus Styles (WCAG 2.2) -------------------------------- */
:focus-visible {
  outline: 3px solid var(--accent-ring);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

:target {
  scroll-margin-top: calc(var(--header-height) + var(--spacing-lg));
}

/* --- Reduced Motion ----------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .back-to-top {
    transition: none;
  }
}

/* --- Service Pages (Privacy, About, 404) -------------------- */
.page-content {
  max-width: 740px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--spacing-lg), 4vw, var(--spacing-2xl));
  box-shadow: var(--shadow-card);
}

.page-content h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
}

.page-content h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
  letter-spacing: -0.015em;
}

.page-content p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
  line-height: 1.7;
}

.page-content ul {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
  list-style: disc;
}

.page-content li {
  margin-bottom: var(--spacing-xs);
  line-height: 1.6;
}

.page-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1.5px;
  font-weight: 500;
}

.page-content a:hover {
  color: var(--color-primary-hover);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-xl);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-weight: 500;
  text-decoration: none !important;
}

.back-link a {
  color: var(--color-text-muted);
  text-decoration: none !important;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.back-link a:hover {
  color: var(--color-primary);
}

/* --- 404 Page ----------------------------------------------- */
.error-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 50vh;
  gap: var(--spacing-md);
}

.error-code {
  font-size: clamp(5rem, 16vw, 9rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  background-image: linear-gradient(135deg, #6471dc 0%, #cc83d4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
}

.error-title {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.error-desc {
  color: var(--color-text-muted);
  max-width: 460px;
  margin-bottom: var(--spacing-md);
}

/* --- Responsive tweaks -------------------------------------- */
@media (max-width: 479px) {
  :root {
    --content-pad: var(--spacing-md);
  }

  .site-logo {
    font-size: 1rem;
  }

  .site-logo-icon {
    width: 28px;
    height: 28px;
    padding: 5px;
  }

  .hero {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
  }

  .tool-card {
    min-height: 150px;
  }

  .footer-inner {
    gap: var(--spacing-sm);
  }

  .page-content {
    padding: var(--spacing-lg);
  }
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}