/* ============================================================
   1. CSS CUSTOM PROPERTIES / TOKENS
   ============================================================ */
:root {
  /* ── Matrix Colors ── */
  --color-bg: #0a0a0a;
  --color-bg-alt: #0d1117;
  --color-surface: #111b21;
  --color-surface-hover: #162029;
  --color-border: #0f3d1e;
  --color-border-glow: #00ff41;

  --color-primary: #00ff41;
  --color-primary-dim: #00cc33;
  --color-primary-dark: #00801f;
  --color-primary-glow: rgba(0, 255, 65, 0.25);
  --color-secondary: #00e5ff;
  --color-secondary-glow: rgba(0, 229, 255, 0.25);
  --color-accent: #ff0090;
  --color-warning: #ffb300;
  --color-error: #ff1744;
  --color-success: #00e676;

  --color-text: #c9d1d9;
  --color-text-bright: #e6edf3;
  --color-text-muted: #7d8590;
  --color-text-dim: #7d8590; /* alias of muted — dim/secondary note text used by many tool pages */
  --color-text-glow: #00ff41;

  /* ── Typography ── */
  --font-display: 'Orbitron', 'Share Tech Mono', monospace;
  --font-mono: 'Share Tech Mono', 'Fira Code', 'Courier New', monospace;
  --font-body: 'Inter', 'Segoe UI', sans-serif;

  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.25rem;
  --fs-xl: 1.5rem;
  --fs-2xl: 2rem;
  --fs-3xl: 2.5rem;
  --fs-4xl: 3.5rem;

  --lh-tight: 1.2;
  --lh-normal: 1.6;
  --lh-loose: 1.8;

  /* ── Spacing ── */
  --space-xxs: 0.125rem; /* extra-extra-small — referenced by a few tool pages; defined here so it resolves */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* ── Borders & Radius ── */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* ── Shadows & Glows ── */
  --glow-sm: 0 0 5px var(--color-primary-glow);
  --glow-md: 0 0 15px var(--color-primary-glow);
  --glow-lg: 0 0 30px var(--color-primary-glow);
  --glow-text: 0 0 10px var(--color-primary-glow), 0 0 20px var(--color-primary-glow);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.6);

  /* ── Transitions ── */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* ── Z-Index Scale ── */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;

  /* ── Layout ── */
  --container-max: 1200px;
  --header-height: 64px;
}

/* ============================================================
   2. CSS RESET / BASE
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--color-text);
  background-color: #050a05;
  background-image:
    /* Circuit nodes — small dots at intersections */
    radial-gradient(circle at 20% 30%, rgba(0, 255, 65, 0.12) 1px, transparent 1px),
    radial-gradient(circle at 80% 70%, rgba(0, 255, 65, 0.10) 1px, transparent 1px),
    radial-gradient(circle at 50% 50%, rgba(0, 255, 65, 0.08) 1px, transparent 1px),
    /* Horizontal circuit traces */
    linear-gradient(0deg, transparent 49.5%, rgba(0, 255, 65, 0.06) 49.5%, rgba(0, 255, 65, 0.06) 50.5%, transparent 50.5%),
    /* Vertical circuit traces */
    linear-gradient(90deg, transparent 49.5%, rgba(0, 255, 65, 0.06) 49.5%, rgba(0, 255, 65, 0.06) 50.5%, transparent 50.5%),
    /* Fine grid overlay */
    linear-gradient(0deg, rgba(0, 255, 65, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 65, 0.035) 1px, transparent 1px),
    /* Deep green vignette gradient */
    radial-gradient(ellipse at center, #081208 0%, #060d06 50%, #040804 100%);
  background-size:
    200px 200px,
    200px 200px,
    100px 100px,
    100px 100px,
    100px 100px,
    25px 25px,
    25px 25px,
    100% 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img,
video,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast), text-shadow var(--transition-fast);
}

a:hover {
  color: var(--color-primary);
  text-shadow: var(--glow-text);
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  border: none;
  outline: none;
  background: none;
}

ul,
ol {
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  box-shadow: var(--glow-sm);
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-primary);
  color: var(--color-bg);
  font-weight: 700;
  font-family: var(--font-mono);
  border-radius: var(--radius-sm);
  z-index: var(--z-toast);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-md);
}

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

/* ============================================================
   3. TYPOGRAPHY
   ============================================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  color: var(--color-primary);
  line-height: var(--lh-tight);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 3.5rem);
  margin-bottom: var(--space-lg);
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  margin-bottom: var(--space-md);
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 2rem);
  margin-bottom: var(--space-md);
}

h4 {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  margin-bottom: var(--space-sm);
}

h5 {
  font-size: var(--fs-md);
  margin-bottom: var(--space-sm);
}

h6 {
  font-size: var(--fs-base);
  margin-bottom: var(--space-sm);
}

p {
  font-size: clamp(0.9rem, 1.5vw, 1.1rem);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.text--glow {
  color: var(--color-primary);
  text-shadow: var(--glow-text);
}

.text--mono {
  font-family: var(--font-mono);
}

.text--muted {
  color: var(--color-text-muted);
}

.text--center {
  text-align: center;
}

code,
pre {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
}

code {
  padding: 0.15em 0.4em;
}

pre {
  padding: var(--space-md);
  overflow-x: auto;
}

/* ============================================================
   4. GLOBAL LAYOUT
   ============================================================ */
.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.section {
  padding-block: var(--space-md);
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid--2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid--4 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

/* ============================================================
   5. HEADER AREA
   ============================================================ */

/* -- Announcement Bar -- */
.announcement-bar {
  background: var(--color-primary);
  color: var(--color-bg);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  text-align: center;
  padding: var(--space-xs) var(--space-md);
  letter-spacing: 0.05em;
}

.announcement-bar a {
  color: var(--color-bg);
  font-weight: 700;
  text-decoration: underline;
}

/* -- Header -- */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

/* -- Logo -- */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-shadow: var(--glow-text);
  white-space: nowrap;
}

.logo__icon {
  width: 32px;
  height: 32px;
}

.logo__tagline {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  text-transform: none;
  letter-spacing: 0;
}

/* -- Desktop Navigation -- */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav__list {
  display: flex;
  gap: var(--space-md);
}

.nav__link {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text);
  padding: var(--space-sm) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
  position: relative;
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-primary);
  background: rgba(0, 255, 65, 0.08);
  text-shadow: none;
}

/* -- Navigation Dropdown -- */
.nav__item--dropdown {
  position: relative;
}

.nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-sm) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  z-index: var(--z-dropdown);
}

.nav__item--dropdown:hover .nav__dropdown,
.nav__item--dropdown:focus-within .nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__dropdown-link {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.nav__dropdown-link:hover {
  background: rgba(0, 255, 65, 0.08);
  color: var(--color-primary);
  text-shadow: none;
}

/* -- Search Bar -- */
.search-bar {
  position: relative;
}

.search-bar__input {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: var(--space-sm) var(--space-md) var(--space-sm) 2.5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text);
  width: 200px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), width var(--transition-base);
}

.search-bar__input:focus {
  border-color: var(--color-border-glow);
  box-shadow: var(--glow-sm);
  width: 260px;
}

.search-bar__icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--color-text-muted);
}

/* -- Header CTA -- */
.header__cta {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-primary);
  color: var(--color-bg);
  border-radius: var(--radius-full);
  font-weight: 700;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
  cursor: pointer;
}

.header__cta:hover {
  box-shadow: var(--glow-md);
  transform: translateY(-1px);
  color: var(--color-bg);
  text-shadow: none;
}

/* -- Mobile Hamburger -- */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-sm);
  z-index: calc(var(--z-overlay) + 1);
}

.hamburger__line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.hamburger.active .hamburger__line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .hamburger__line:nth-child(2) {
  opacity: 0;
}

.hamburger.active .hamburger__line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* -- Mobile Menu Overlay -- */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  top: var(--header-height);
  background: rgba(10, 10, 10, 0.97);
  z-index: var(--z-overlay);
  padding: var(--space-xl) var(--space-md);
  overflow-y: auto;
  flex-direction: column;
  gap: var(--space-sm);
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu__link {
  display: block;
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-fast);
}

.mobile-menu__link:hover {
  color: var(--color-primary);
  text-shadow: none;
}

/* ============================================================
   6. HERO AREA
   ============================================================ */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-block: var(--space-xl);
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom,
      rgba(10, 10, 10, 0.3) 0%,
      rgba(10, 10, 10, 0.7) 50%,
      var(--color-bg) 100%);
  z-index: 1;
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 4rem);
  margin-bottom: var(--space-md);
  text-shadow: var(--glow-text);
}

.hero__subtitle {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-secondary);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero__description {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  color: var(--color-text);
  max-width: 560px;
  line-height: var(--lh-loose);
  margin-bottom: var(--space-xl);
}

.hero__actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero__stats {
  display: flex;
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
}

.hero__stat {
  text-align: center;
}

.hero__stat-value {
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  color: var(--color-primary);
  text-shadow: var(--glow-text);
}

.hero__stat-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ============================================================
   7. CONTENT COMPONENTS
   ============================================================ */
.section-header {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-2xl);
}

.section-header__label {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-sm);
  display: block;
}

.section-header__title {
  margin-bottom: var(--space-sm);
}

.section-header__description {
  color: var(--color-text-muted);
  font-size: var(--fs-md);
}

.divider {
  border: none;
  height: 1px;
  background: var(--color-border);
  margin-block: var(--space-2xl);
}

.divider--glow {
  background: linear-gradient(90deg, transparent, var(--color-primary-glow), transparent);
  box-shadow: var(--glow-sm);
}

/* ============================================================
   8. CARD COMPONENTS
   ============================================================ */
.cards-section {
  padding-block: var(--space-md);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
  display: flex;
  flex-direction: column;
  cursor: pointer;
  text-decoration: none;
}

.card:hover {
  border-color: var(--color-border-glow);
  box-shadow: var(--glow-md), var(--shadow-card);
  transform: translateY(-4px);
}

.card__icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: rgba(0, 255, 65, 0.08);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.card__title {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  color: var(--color-text-bright);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.card__count {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-primary);
  background: rgba(0, 255, 65, 0.1);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: var(--space-sm);
}

.card__description {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-normal);
  flex: 1;
}

.card__link {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-primary);
  margin-top: var(--space-md);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  transition: gap var(--transition-fast);
}

.card:hover .card__link {
  gap: var(--space-sm);
}

/* ============================================================
   9. UI ELEMENTS
   ============================================================ */

/* -- Buttons -- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  text-decoration: none;
  line-height: 1;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-bg);
  border: 1px solid var(--color-primary);
}

.btn--primary:hover {
  box-shadow: var(--glow-md);
  transform: translateY(-2px);
  color: var(--color-bg);
  text-shadow: none;
}

.btn--secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn--secondary:hover {
  background: rgba(0, 255, 65, 0.1);
  box-shadow: var(--glow-sm);
  text-shadow: none;
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  text-shadow: none;
}

.btn--icon {
  padding: 0.6rem;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn--icon:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: var(--glow-sm);
  text-shadow: none;
}

.btn--large {
  font-size: var(--fs-base);
  padding: 1rem 2rem;
}

.btn--full {
  width: 100%;
}

/* -- Badge / Label -- */
.badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.badge--primary {
  background: rgba(0, 255, 65, 0.15);
  color: var(--color-primary);
  border: 1px solid rgba(0, 255, 65, 0.3);
}

.badge--secondary {
  background: rgba(0, 229, 255, 0.15);
  color: var(--color-secondary);
  border: 1px solid rgba(0, 229, 255, 0.3);
}

.badge--free {
  background: rgba(0, 230, 118, 0.15);
  color: var(--color-success);
  border: 1px solid rgba(0, 230, 118, 0.3);
}

/* -- Tooltip -- */
.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) scale(0.9);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  z-index: var(--z-dropdown);
}

.tooltip:hover::after {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

/* ============================================================
   10. TOOL INTERFACE
   ============================================================ */
.tool-container {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-block: var(--space-xl);
}

.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.tool-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.tool-panel__title {
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-xs);
}

/* -- Input Field -- */
.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.input-group__label {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.input {
  width: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.75rem var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--fs-base);
  color: var(--color-text-bright);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input:focus {
  border-color: var(--color-border-glow);
  box-shadow: var(--glow-sm);
}

.input::placeholder {
  color: var(--color-text-muted);
  opacity: 0.6;
}

.input--error {
  border-color: var(--color-error);
  box-shadow: 0 0 8px rgba(255, 23, 68, 0.3);
}

/* -- Textarea -- */
.textarea {
  width: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text-bright);
  resize: vertical;
  min-height: 120px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.textarea:focus {
  border-color: var(--color-border-glow);
  box-shadow: var(--glow-sm);
}

/* -- Dropdown Select -- */
.select {
  width: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.75rem var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--fs-base);
  color: var(--color-text-bright);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%2300ff41' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.select:focus {
  border-color: var(--color-border-glow);
  box-shadow: var(--glow-sm);
}

/* -- Range Slider -- */
.range-slider {
  width: 100%;
  height: 6px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-full);
  outline: none;
  appearance: none;
  cursor: pointer;
}

.range-slider::-webkit-slider-thumb {
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border-radius: 50%;
  box-shadow: var(--glow-sm);
  cursor: pointer;
  transition: box-shadow var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
  box-shadow: var(--glow-md);
}

.range-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border: none;
  border-radius: 50%;
  box-shadow: var(--glow-sm);
  cursor: pointer;
}

/* -- Upload Box -- */
.upload-box {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.upload-box:hover {
  border-color: var(--color-primary);
  background: rgba(0, 255, 65, 0.03);
}

.upload-box__text {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

/* -- Result Box -- */
.result-box {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--fs-base);
  color: var(--color-text-bright);
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.result-box--large {
  font-size: var(--fs-3xl);
  color: var(--color-primary);
  text-shadow: var(--glow-text);
  padding: var(--space-xl);
  min-height: 100px;
}

/* -- Action Buttons Group -- */
.tool-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* ============================================================
   11. INFORMATIONAL SECTIONS
   ============================================================ */

/* -- Features Section -- */
.features-section {
  padding-block: var(--space-md);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.feature-card {
  padding: var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base);
}

.feature-card:hover {
  border-color: var(--color-border-glow);
}

.feature-card__icon {
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.feature-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-base);
  color: var(--color-text-bright);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
}

.feature-card__text {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

/* -- Steps / How It Works -- */
.steps-section {
  padding-block: var(--space-md);
}

.steps {
  counter-reset: step;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.step {
  counter-increment: step;
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.step::before {
  content: counter(step);
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  color: var(--color-primary);
  text-shadow: var(--glow-text);
  min-width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

/* -- Stats / Counters -- */
.stats-section {
  padding-block: var(--space-md);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-lg);
  text-align: center;
}

.stat__value {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  color: var(--color-primary);
  text-shadow: var(--glow-text);
}

.stat__label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: var(--space-xs);
}

/* ============================================================
   12. CONVERSION COMPONENTS (CTA)
   ============================================================ */
.cta-section {
  position: relative;
  padding-block: var(--space-xl);
  text-align: center;
  overflow: hidden;
}

.cta-section__bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(0, 255, 65, 0.06) 0%, transparent 70%);
  z-index: 0;
}

.cta-section__content {
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin-inline: auto;
}

.newsletter {
  display: flex;
  gap: var(--space-sm);
  max-width: 440px;
  margin-inline: auto;
  margin-top: var(--space-lg);
}

.newsletter__input {
  flex: 1;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.75rem var(--space-md);
  font-family: var(--font-mono);
  color: var(--color-text);
}

.newsletter__input:focus {
  border-color: var(--color-border-glow);
  box-shadow: var(--glow-sm);
}

/* ============================================================
   13. SOCIAL PROOF
   ============================================================ */
.testimonials-section {
  padding-block: var(--space-md);
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.testimonial-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.testimonial-card__text {
  font-style: italic;
  color: var(--color-text);
  font-size: var(--fs-sm);
  line-height: var(--lh-loose);
  margin-bottom: var(--space-md);
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  color: var(--color-primary);
  font-size: var(--fs-sm);
  border: 1px solid var(--color-border);
}

.testimonial-card__name {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text-bright);
}

.testimonial-card__role {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.rating-stars {
  color: var(--color-warning);
  font-size: var(--fs-sm);
  letter-spacing: 2px;
  margin-bottom: var(--space-sm);
}

.brand-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xl);
  flex-wrap: wrap;
  opacity: 0.5;
  filter: grayscale(1);
}

.brand-logos img {
  height: 32px;
  transition: opacity var(--transition-fast), filter var(--transition-fast);
}

.brand-logos img:hover {
  opacity: 1;
  filter: grayscale(0);
}

/* ============================================================
   14. SUPPORT CONTENT (FAQ)
   ============================================================ */
.faq-section {
  padding-block: var(--space-md);
}

.faq-list {
  max-width: 740px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item[open] {
  border-color: var(--color-border-glow);
}

.faq-item__question {
  font-family: var(--font-mono);
  font-size: var(--fs-base);
  color: var(--color-text-bright);
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
  transition: color var(--transition-fast);
}

.faq-item__question::-webkit-details-marker {
  display: none;
}

.faq-item__question::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: var(--fs-lg);
  color: var(--color-primary);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
  margin-left: var(--space-md);
}

.faq-item[open] .faq-item__question::after {
  transform: rotate(45deg);
}

.faq-item__answer {
  padding: 0 var(--space-lg) var(--space-md);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-loose);
}

/* ============================================================
   15. UTILITY COMPONENTS
   ============================================================ */

/* -- Tabs -- */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  gap: 0;
}

.tab {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.tab:hover {
  color: var(--color-text);
}

.tab--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-content {
  display: none;
  padding-top: var(--space-lg);
}

.tab-content--active {
  display: block;
}

/* -- Modal / Popup -- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  max-width: 520px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95);
  transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal__close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  cursor: pointer;
  font-size: var(--fs-lg);
  color: var(--color-text-muted);
}

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

/* -- Notification Banner -- */
.notification {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.notification--success {
  background: rgba(0, 230, 118, 0.1);
  border: 1px solid rgba(0, 230, 118, 0.3);
  color: var(--color-success);
}

.notification--error {
  background: rgba(255, 23, 68, 0.1);
  border: 1px solid rgba(255, 23, 68, 0.3);
  color: var(--color-error);
}

.notification--warning {
  background: rgba(255, 179, 0, 0.1);
  border: 1px solid rgba(255, 179, 0, 0.3);
  color: var(--color-warning);
}

.notification--info {
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.3);
  color: var(--color-secondary);
}

/* -- Progress Bar -- */
.progress {
  width: 100%;
  height: 6px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress__bar {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  box-shadow: var(--glow-sm);
  transition: width var(--transition-slow);
}

/* -- Loading Spinner -- */
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* -- Breadcrumb -- */
.breadcrumb ol {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  padding: var(--space-md) 0;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-muted);
}

.breadcrumb li+li::before {
  content: '›';
  color: var(--color-border-glow);
}

.breadcrumb a {
  color: var(--color-text-muted);
}

.breadcrumb a:hover {
  color: var(--color-primary);
  text-shadow: none;
}

.breadcrumb [aria-current="page"] {
  color: var(--color-primary);
}

/* ============================================================
   16. FOOTER AREA
   ============================================================ */
.footer {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-xl);
  margin-top: auto;
  background: var(--color-bg-alt);
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-2xl);
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.footer__col-title {
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__link {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-primary);
  text-shadow: none;
}

.social-icons {
  display: flex;
  gap: var(--space-md);
}

.social-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  transition: border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.social-icon:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: var(--glow-sm);
  text-shadow: none;
}

.footer__bottom {
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  text-align: center;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.footer__copyright {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

/* ============================================================
   17. ANIMATIONS & KEYFRAMES
   ============================================================ */
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes glowPulse {

  0%,
  100% {
    box-shadow: var(--glow-sm);
  }

  50% {
    box-shadow: var(--glow-lg);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes flickerIn {
  0% {
    opacity: 0;
  }

  10% {
    opacity: 0.5;
  }

  20% {
    opacity: 0.2;
  }

  40% {
    opacity: 0.8;
  }

  60% {
    opacity: 0.4;
  }

  80% {
    opacity: 0.9;
  }

  100% {
    opacity: 1;
  }
}

@keyframes typing {
  from {
    width: 0;
  }

  to {
    width: 100%;
  }
}

/* -- Scroll Reveal -- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

/* -- Mic Active Indicator -- */
.mic-active {
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--color-error);
  border-radius: 50%;
  animation: glowPulse 1.2s ease infinite;
  margin-right: var(--space-sm);
}

/* ============================================================
   18. RESPONSIVE / MEDIA QUERIES
   ============================================================ */

/* Small tablets / large phones */
@media (max-width: 991px) {
  .nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .search-bar {
    display: none;
  }

  .header__cta {
    display: none;
  }

  .hero {
    min-height: 60vh;
    padding-block: var(--space-2xl);
  }

  .hero__title {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
  }

  .hero__stats {
    gap: var(--space-lg);
  }

  .tool-grid {
    grid-template-columns: 1fr;
  }
}

/* Tablets */
@media (max-width: 767px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .testimonial-grid {
    grid-template-columns: 1fr;
  }

  .newsletter {
    flex-direction: column;
  }

  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    width: 100%;
  }

  .hero__stats {
    flex-direction: column;
    gap: var(--space-md);
  }

  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile */
@media (max-width: 479px) {
  :root {
    --space-xl: 1.5rem;
    --space-2xl: 2rem;
    --space-3xl: 2.5rem;
    --space-4xl: 3rem;
  }

  .container {
    padding-inline: var(--space-sm);
  }

  .section {
    padding-block: var(--space-2xl);
  }

  .logo {
    font-size: var(--fs-base);
  }

  .logo__tagline {
    display: none;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .social-icons {
    justify-content: center;
  }

  .step {
    flex-direction: column;
  }

  .tabs {
    overflow-x: auto;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   BACK TO TOP BUTTON
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 9999;
  width: 48px;
  height: 48px;
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  background: rgba(0, 255, 65, 0.08);
  color: var(--color-primary);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease, background 0.2s ease, box-shadow 0.2s ease;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 0 12px rgba(0, 255, 65, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: rgba(0, 255, 65, 0.2);
  box-shadow: 0 0 24px rgba(0, 255, 65, 0.35);
  transform: translateY(-3px);
}

.back-to-top:active {
  transform: translateY(0);
}

/* ============================================================
   SHARED TOOL-PAGE COMPONENTS
   Canonical styles for the explanatory sections + related-tools grid
   used by the tool-page template (the non-BEM .faq-question / .faq-answer /
   .related-tool-card / .content-section / .panel-title / .input-label /
   .input-hint classes). ~110 older tools define these locally in tool.css;
   defining them globally here so every template tool renders consistently
   without per-page duplication. A tool's local tool.css rule (loaded after
   this file) still overrides where present. Values match the established look
   (432-hz-tone-generator). NOTE: .faq-list / .faq-item are already defined
   above; this only adds the inner .faq-question / .faq-answer.
   ============================================================ */
.panel-title {
  font-family: var(--font-display);
  font-size: var(--fs-base);
  color: var(--color-primary);
  margin: 0 0 var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.input-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
  font-family: var(--font-mono);
  gap: var(--space-sm);
}
.input-hint {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  margin-top: 4px;
  font-style: italic;
}
.content-section {
  max-width: 800px;
  margin: 0 auto var(--space-lg);
  color: var(--color-text);
  line-height: 1.7;
}
.content-section h3 {
  color: var(--color-secondary);
  font-family: var(--font-display);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-xs);
  font-size: var(--fs-md);
}
.content-section p { margin-bottom: var(--space-sm); }
.content-section ul { margin: var(--space-sm) 0 var(--space-sm) var(--space-lg); }
.content-section li { margin-bottom: 4px; }
.faq-question {
  padding: var(--space-md);
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text-bright);
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after { content: '+'; color: var(--color-primary); font-size: 1.3em; font-weight: 700; }
details[open] .faq-question::after { content: '−'; }
.faq-answer {
  padding: 0 var(--space-md) var(--space-md);
  color: var(--color-text-muted);
  line-height: 1.75;
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-sm);
}
.related-tools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  max-width: 900px;
  margin: 0 auto;
}
.related-tool-card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-decoration: none;
  transition: border-color 0.2s, transform 0.2s;
  text-align: left;
}
.related-tool-card:hover { border-color: var(--color-primary); transform: translateY(-2px); }
.related-tool-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}
.related-tool-card__desc {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}
@media (max-width: 768px) {
  .related-tools-grid { grid-template-columns: 1fr; }
}