/* ============================================================
   NALOGER.RU — Main Stylesheet
   Структура:
   1.  CSS Variables (Design Tokens)
   2.  Reset & Base
   3.  Typography
   4.  Layout Utilities
   5.  Buttons
   6.  Tags & Badges
   7.  Header & Nav
   8.  Hero Section
   9.  Section Commons
   10. Categories Grid
   11. Article Cards
   12. Calculator Cards
   13. Trust Block
   14. FAQ Accordion
   15. Ad Blocks
   16. Footer
   17. Responsive (Mobile)
   ============================================================ */


/* ============================================================
   1. CSS VARIABLES
   ============================================================ */
:root {
  /* — Brand Colors — */
  --color-primary:      #1A3A5C;
  --color-primary-dark: #112840;
  --color-accent:       #2E7CF6;
  --color-accent-dark:  #1a63d4;
  --color-success:      #00B894;
  --color-success-dark: #009476;
  --color-warning:      #F4A821;

  /* — Neutral Colors — */
  --color-bg:           #F7F9FC;
  --color-bg-white:     #FFFFFF;
  --color-bg-light:     #EBF4FF;
  --color-surface:      #FFFFFF;
  --color-border:       #E3E9F0;
  --color-border-light: #F0F4F8;

  /* — Text Colors — */
  --color-text:         #1C2B3A;
  --color-text-muted:   #6B7A8D;
  --color-text-light:   #9CA8B5;
  --color-text-inverse: #FFFFFF;

  /* — Category Accent Colors — */
  --color-cat-blue:     #2E7CF6;
  --color-cat-blue-bg:  #EBF3FF;
  --color-cat-indigo:   #6366F1;
  --color-cat-indigo-bg:#EEF2FF;
  --color-cat-orange:   #F59E0B;
  --color-cat-orange-bg:#FFFBEB;
  --color-cat-green:    #00B894;
  --color-cat-green-bg: #E6FAF6;
  --color-cat-teal:     #0D9488;
  --color-cat-teal-bg:  #F0FDFA;
  --color-cat-gray:     #6B7A8D;
  --color-cat-gray-bg:  #F4F6F8;

  /* — Shadows — */
  --shadow-xs:  0 1px 3px rgba(26, 58, 92, 0.06);
  --shadow-sm:  0 2px 8px rgba(26, 58, 92, 0.08);
  --shadow-md:  0 4px 16px rgba(26, 58, 92, 0.10);
  --shadow-lg:  0 8px 32px rgba(26, 58, 92, 0.12);
  --shadow-hover: 0 8px 24px rgba(46, 124, 246, 0.15);

  /* — Spacing — */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  /* — Layout — */
  --container-max: 1200px;
  --container-pad: var(--space-6);
  --header-h:      72px;

  /* — Border Radius — */
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-full: 9999px;

  /* — Typography — */
  --font-base:   'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:   'JetBrains Mono', 'Fira Mono', monospace;

  --text-xs:   13px;
  --text-sm:   14px;
  --text-base: 17px;
  --text-md:   18px;
  --text-lg:   22px;
  --text-xl:   28px;
  --text-2xl:  36px;
  --text-3xl:  48px;

  --leading-tight:  1.2;
  --leading-snug:   1.4;
  --leading-normal: 1.6;
  --leading-relaxed:1.75;

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


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

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

body {
  font-family: var(--font-base);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-dark);
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}


/* ============================================================
   3. TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: var(--leading-tight);
  color: var(--color-text);
}

h1 { font-size: clamp(28px, 5vw, var(--text-3xl)); }
h2 { font-size: clamp(22px, 3.5vw, var(--text-2xl)); }
h3 { font-size: clamp(18px, 2.5vw, var(--text-lg)); }

p { margin-bottom: 0; }

strong { font-weight: 600; }


/* ============================================================
   4. LAYOUT UTILITIES
   ============================================================ */
.container {
  width: 100%;
  max-width: calc(var(--container-max) + var(--container-pad) * 2);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}


/* ============================================================
   5. BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-md);
  padding: 14px 24px;
  transition: background var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
  white-space: nowrap;
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
}
.btn--primary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-hover);
}

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

.btn--outline {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn--outline:hover {
  background-color: var(--color-bg-light);
  color: var(--color-accent-dark);
}

.btn--sm {
  font-size: var(--text-xs);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
}


/* ============================================================
   6. TAGS & BADGES
   ============================================================ */
.tag {
  display: inline-flex;
  align-items: center;
  font-size: var(--text-xs);
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background-color: rgba(255, 255, 255, 0.2);
  color: var(--color-text-inverse);
  border: 1px solid rgba(255, 255, 255, 0.35);
  transition: background var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
  backdrop-filter: blur(4px);
}

.tag:hover {
  background-color: rgba(255, 255, 255, 0.35);
  color: var(--color-text-inverse);
}

.tag-badge {
  display: inline-flex;
  align-items: center;
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  text-decoration: none;
}

.tag-badge--blue   { background: var(--color-cat-blue-bg);   color: var(--color-cat-blue); }
.tag-badge--indigo { background: var(--color-cat-indigo-bg); color: var(--color-cat-indigo); }
.tag-badge--orange { background: var(--color-cat-orange-bg); color: var(--color-cat-orange); }
.tag-badge--green  { background: var(--color-cat-green-bg);  color: var(--color-cat-green); }
.tag-badge--teal   { background: var(--color-cat-teal-bg);   color: var(--color-cat-teal); }
.tag-badge--gray   { background: var(--color-cat-gray-bg);   color: var(--color-cat-gray); }


/* ============================================================
   7. HEADER & NAV
   ============================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg-white);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  height: var(--header-h);
}

/* Logo */
.logo {
  display: flex;
  align-items: baseline;
  gap: 1px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo__text {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.5px;
}

.logo__dot {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-accent);
}

.logo--light .logo__text { color: #FFFFFF; }
.logo--light .logo__dot  { color: var(--color-success); }

/* Navigation */
.nav {
  flex: 1;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__item--dropdown {
  position: relative;
  padding-bottom: var(--space-2);
}

.nav__item--dropdown:hover .nav__dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.nav__link {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}

.nav__link:hover {
  color: var(--color-accent);
  background-color: var(--color-bg-light);
}

.nav__link--trigger {
  border: none;
  background: transparent;
  cursor: pointer;
  font: inherit;
}

.nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2) 0;
  min-width: 220px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.nav__dropdown li a {
  display: block;
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.nav__dropdown li a:hover {
  background: var(--color-bg);
  color: var(--color-accent);
}

/* Header Actions */
.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.header__search-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.header__search-btn:hover {
  color: var(--color-accent);
  background-color: var(--color-bg-light);
}

/* Burger */
.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-shrink: 0;
}

.burger span {
  display: block;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.burger--open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger--open span:nth-child(2) { opacity: 0; }
.burger--open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─── Inline Header Search ─────────────────────────────── */

/* Sits between .nav and .header__actions inside header__inner.
   Hidden by default; revealed when header gets .header--search-open */
.header__search-inline {
  flex: 1;
  display: none;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
  padding: 0 var(--space-2);
  position: relative;
}

/* When open: collapse nav + hide ask-button, reveal inline form */
.header--search-open .nav            { display: none; }
.header--search-open .header__ask-btn { display: none; }

.header--search-open .header__search-inline {
  display: flex;
  animation: searchSlideIn 220ms ease;
}

/* Subtle accent border on the header bottom edge */
.header--search-open {
  border-bottom-color: var(--color-accent);
}

@keyframes searchSlideIn {
  from { opacity: 0; transform: translateX(12px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* Decorative search icon (left side of the inline form) */
.header__search-icon {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

/* Text input */
.header__search-input {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  font-size: var(--text-base);
  font-family: var(--font-base);
  color: var(--color-text);
  height: var(--header-h);
  outline: none;
  caret-color: var(--color-accent);
}

.header__search-input::placeholder { color: var(--color-text-light); }

/* Close (✕) button inside the inline form */
.header__search-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.header__search-close:hover {
  color: var(--color-text);
  background: var(--color-bg);
}

/* Live search dropdown */
.search-suggest {
  position: absolute;
  left: var(--space-2);
  right: var(--space-2);
  top: calc(100% - 10px);
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  z-index: 30;
}

.search-suggest__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.search-suggest__item + .search-suggest__item {
  border-top: 1px solid var(--color-border-light);
}

.search-suggest__link {
  display: block;
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
}

.search-suggest__title {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: var(--leading-snug);
}

.search-suggest__meta {
  display: block;
  margin-top: 2px;
  font-size: var(--text-xs);
  color: var(--color-text-light);
}

.search-suggest__link:hover {
  background: var(--color-bg);
}

.search-suggest__all {
  border-top: 1px solid var(--color-border-light);
}

.search-suggest__all a {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
}


/* ============================================================
   8. HERO SECTION
   ============================================================ */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #1e4d7b 50%, #0d3660 100%);
  padding: var(--space-16) 0 var(--space-20);
  overflow: hidden;
  position: relative;
}

/* Subtle background pattern */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(46, 124, 246, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0, 184, 148, 0.10) 0%, transparent 40%);
  pointer-events: none;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-16);
  align-items: center;
  position: relative;
}

.hero__content {
  max-width: 640px;
}

.hero__title {
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 700;
  color: var(--color-text-inverse);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-5);
  letter-spacing: -0.5px;
}

.hero__title-accent {
  color: var(--color-success);
}

.hero__subtitle {
  font-size: clamp(16px, 2vw, 18px);
  color: rgba(255, 255, 255, 0.80);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-8);
}

.hero__br { display: none; }

/* Hero Search */
.hero__search-wrap {
  display: flex;
  align-items: center;
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-4);
  box-shadow: var(--shadow-lg);
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.hero__search-icon {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.hero__search-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: var(--text-base);
  color: var(--color-text);
  height: 44px;
  min-width: 0;
}

.hero__search-input::placeholder { color: var(--color-text-light); }
.hero__search-input:focus { outline: none; }

.hero__search-btn {
  flex-shrink: 0;
  padding: 12px 24px;
  font-size: var(--text-sm);
}

/* Hero Tags */
.hero__tags {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.hero__tags-label {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.60);
  white-space: nowrap;
  font-weight: 500;
}

/* Hero Visual Cards */
.hero__visual {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  flex-shrink: 0;
}

.hero__card {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  background: rgba(255, 255, 255, 0.10);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  min-width: 260px;
  transition: transform var(--transition-base), background var(--transition-base);
}

.hero__card:hover {
  background: rgba(255, 255, 255, 0.16);
  transform: translateX(-4px);
}

.hero__card--1 { transform: translateX(0); }
.hero__card--2 { transform: translateX(20px); }
.hero__card--3 { transform: translateX(8px); }

.hero__card--1:hover { transform: translateX(-4px); }
.hero__card--2:hover { transform: translateX(16px); }
.hero__card--3:hover { transform: translateX(4px); }

.hero__card-icon {
  font-size: 28px;
  line-height: 1;
  flex-shrink: 0;
}

.hero__card-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hero__card-text strong {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text-inverse);
}

.hero__card-text span {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.70);
}


/* ============================================================
   9. SECTION COMMONS
   ============================================================ */
.section {
  padding: var(--space-16) 0;
}

.section__title {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.section__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.section__title--center,
.section__subtitle--center {
  text-align: center;
}

.section__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.section__head > div {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}


/* ============================================================
   10. CATEGORIES GRID
   ============================================================ */
.categories {
  background: var(--color-bg-white);
  border-bottom: 1px solid var(--color-border-light);
}

.categories .section__title { margin-bottom: var(--space-2); }
.categories .section__subtitle { margin-bottom: var(--space-8); }

.categories__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.category-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.category-card__link {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  height: 100%;
  text-decoration: none;
  position: relative;
}

.category-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.category-card__icon svg {
  width: 24px;
  height: 24px;
}

.category-card__title {
  font-size: var(--text-md);
  font-weight: 700;
  color: var(--color-text);
  line-height: var(--leading-snug);
}

.category-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-normal);
  flex: 1;
}

.category-card__arrow {
  font-size: var(--text-md);
  font-weight: 700;
  transition: transform var(--transition-fast);
  margin-top: auto;
}

.category-card:hover .category-card__arrow {
  transform: translateX(4px);
}

/* Category Color Themes */
.category-card--blue {
  background: var(--color-cat-blue-bg);
  border: 1px solid rgba(46, 124, 246, 0.15);
}
.category-card--blue .category-card__icon { background: rgba(46, 124, 246, 0.12); color: var(--color-cat-blue); }
.category-card--blue .category-card__title { color: var(--color-primary); }
.category-card--blue .category-card__arrow { color: var(--color-cat-blue); }

.category-card--indigo {
  background: var(--color-cat-indigo-bg);
  border: 1px solid rgba(99, 102, 241, 0.15);
}
.category-card--indigo .category-card__icon { background: rgba(99, 102, 241, 0.12); color: var(--color-cat-indigo); }
.category-card--indigo .category-card__arrow { color: var(--color-cat-indigo); }

.category-card--orange {
  background: var(--color-cat-orange-bg);
  border: 1px solid rgba(245, 158, 11, 0.15);
}
.category-card--orange .category-card__icon { background: rgba(245, 158, 11, 0.12); color: var(--color-cat-orange); }
.category-card--orange .category-card__arrow { color: var(--color-cat-orange); }

.category-card--green {
  background: var(--color-cat-green-bg);
  border: 1px solid rgba(0, 184, 148, 0.15);
}
.category-card--green .category-card__icon { background: rgba(0, 184, 148, 0.12); color: var(--color-cat-green); }
.category-card--green .category-card__arrow { color: var(--color-cat-green); }

.category-card--teal {
  background: var(--color-cat-teal-bg);
  border: 1px solid rgba(13, 148, 136, 0.15);
}
.category-card--teal .category-card__icon { background: rgba(13, 148, 136, 0.12); color: var(--color-cat-teal); }
.category-card--teal .category-card__arrow { color: var(--color-cat-teal); }

.category-card--gray {
  background: var(--color-cat-gray-bg);
  border: 1px solid rgba(107, 122, 141, 0.15);
}
.category-card--gray .category-card__icon { background: rgba(107, 122, 141, 0.12); color: var(--color-cat-gray); }
.category-card--gray .category-card__arrow { color: var(--color-cat-gray); }


/* ============================================================
   11. ARTICLE CARDS
   ============================================================ */
.articles { background: var(--color-bg); }

.articles__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.article-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(46, 124, 246, 0.25);
}

.article-card__link {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  height: 100%;
  text-decoration: none;
  color: inherit;
}

.article-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.article-card__read-time {
  font-size: var(--text-xs);
  color: var(--color-text-light);
  white-space: nowrap;
}

.article-card__title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  line-height: var(--leading-snug);
  flex: 1;
  transition: color var(--transition-fast);
}

.article-card:hover .article-card__title {
  color: var(--color-accent);
}

.article-card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-normal);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card__footer {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border-light);
  margin-top: auto;
}

.article-card__date,
.article-card__updated {
  font-size: var(--text-xs);
  color: var(--color-text-light);
}

.article-card__updated {
  margin-left: auto;
}


/* ============================================================
   12. CALCULATOR CARDS
   ============================================================ */
.calculators { background: var(--color-bg-white); }

.calculators__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.calc-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.calc-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(46, 124, 246, 0.30);
  background: var(--color-bg-white);
}

.calc-card__icon {
  width: 52px;
  height: 52px;
  background: var(--color-bg-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.calc-card__icon svg {
  width: 26px;
  height: 26px;
}

.calc-card__title {
  font-size: var(--text-md);
  font-weight: 700;
  color: var(--color-text);
  line-height: var(--leading-snug);
}

.calc-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-normal);
  flex: 1;
}

.calc-card__btn {
  align-self: flex-start;
  margin-top: auto;
}


/* ============================================================
   13. TRUST BLOCK
   ============================================================ */
.trust {
  background: linear-gradient(135deg, var(--color-primary) 0%, #1e4d7b 100%);
  position: relative;
  overflow: hidden;
}

.trust::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 80% 50%, rgba(0, 184, 148, 0.12) 0%, transparent 50%);
  pointer-events: none;
}

.trust .section__title { color: var(--color-text-inverse); position: relative; }
.trust .section__subtitle { color: rgba(255,255,255,0.70); margin-bottom: var(--space-10); position: relative; }

.trust__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-bottom: var(--space-10);
  position: relative;
}

.trust-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  backdrop-filter: blur(4px);
  transition: background var(--transition-base), transform var(--transition-base);
}

.trust-card:hover {
  background: rgba(255, 255, 255, 0.13);
  transform: translateY(-3px);
}

.trust-card__number {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  color: var(--color-success);
  line-height: 1;
  margin-bottom: var(--space-3);
  letter-spacing: -1px;
}

.trust-card__number span {
  font-size: 0.6em;
}

.trust-card__title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-inverse);
  margin-bottom: var(--space-2);
}

.trust-card__desc {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.65);
  line-height: var(--leading-normal);
}

.trust__text {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: var(--space-6) var(--space-8);
  position: relative;
}

.trust__text::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--color-success);
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

.trust__text p {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.80);
  line-height: var(--leading-relaxed);
}


/* ============================================================
   14. FAQ ACCORDION
   ============================================================ */
.faq { background: var(--color-bg-white); }

.faq__container {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: var(--space-16);
  align-items: start;
}

.faq__header {
  position: sticky;
  top: calc(var(--header-h) + var(--space-8));
}

.faq__header .section__title { margin-bottom: var(--space-3); }
.faq__header .section__subtitle { margin-bottom: var(--space-6); }

.faq__list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item:first-child {
  border-top: 1px solid var(--color-border);
}

.faq-item__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
  padding: var(--space-5) 0;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: color var(--transition-fast);
  cursor: pointer;
}

.faq-item__question:hover {
  color: var(--color-accent);
}

.faq-item--open .faq-item__question {
  color: var(--color-accent);
}

.faq-item__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: transform var(--transition-base);
}

.faq-item--open .faq-item__icon {
  transform: rotate(180deg);
  color: var(--color-accent);
}

.faq-item__answer {
  padding-bottom: var(--space-5);
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-5);
  margin-left: 1px;
}

.faq-item__answer p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

.faq__footer {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}


/* ============================================================
   15. AD BLOCKS
   ============================================================ */
.ad-block {
  position: relative;
  margin: var(--space-8) 0;
  border-radius: var(--radius-md);
  background: var(--color-border-light);
  overflow: hidden;
}

.ad-block__label {
  position: absolute;
  top: var(--space-2);
  right: var(--space-3);
  font-size: 11px;
  font-weight: 400;
  color: var(--color-text-light);
  letter-spacing: 0.5px;
  z-index: 1;
}

.ad-block__placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: var(--text-xs);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
}

.ad-block--leaderboard .ad-block__placeholder {
  height: 90px;
}

.ad-block--rectangle .ad-block__placeholder {
  height: 250px;
  width: 300px;
}


/* ============================================================
   16. FOOTER
   ============================================================ */
.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.80);
}

.footer__inner {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--space-16);
  padding-top: var(--space-16);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.10);
}

.footer__tagline {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.70);
  margin-top: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer__disclaimer {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.45);
  line-height: var(--leading-normal);
}

.footer__nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.footer__nav-title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: rgba(255, 255, 255, 0.50);
  margin-bottom: var(--space-4);
}

.footer__nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__nav-list a {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.70);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__nav-list a:hover {
  color: var(--color-text-inverse);
}

.footer__bottom {
  padding: var(--space-5) 0;
}

.footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.footer__copyright {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.45);
}

.footer__legal {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.footer__legal a {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__legal a:hover {
  color: rgba(255, 255, 255, 0.80);
}


/* ============================================================
   17. RESPONSIVE — TABLET (≤ 1024px)
   ============================================================ */
@media (max-width: 1024px) {
  :root {
    --container-pad: var(--space-5);
    --space-16: 56px;
    --space-20: 64px;
  }

  .hero__inner {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .hero__visual {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero__card {
    flex: 1 1 220px;
    min-width: 200px;
  }

  .hero__card--1,
  .hero__card--2,
  .hero__card--3 {
    transform: none;
  }

  .hero__card--1:hover,
  .hero__card--2:hover,
  .hero__card--3:hover {
    transform: translateY(-2px);
  }

  .categories__grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

  .trust__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .faq__container {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .faq__header {
    position: static;
  }

  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .footer__nav {
    grid-template-columns: repeat(4, 1fr);
  }
}


/* ============================================================
   17. RESPONSIVE — MOBILE (≤ 768px)
   ============================================================ */
@media (max-width: 768px) {
  :root {
    --container-pad: var(--space-4);
    --header-h:      60px;
    --space-16: 48px;
    --text-base: 16px;
  }

  /* Header mobile */
  .nav {
    display: none;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-white);
    padding: var(--space-6) var(--container-pad);
    overflow-y: auto;
    z-index: 99;
    border-top: 1px solid var(--color-border);
  }

  .nav--open {
    display: block;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-1);
  }

  .nav__link {
    font-size: var(--text-base);
    padding: var(--space-4) var(--space-3);
    border-bottom: 1px solid var(--color-border-light);
  }

  .nav__dropdown {
    position: static;
    opacity: 1;
    pointer-events: auto;
    transform: none;
    box-shadow: none;
    border: none;
    padding: 0 0 0 var(--space-4);
    display: none;
  }

  .nav__item--dropdown .nav__dropdown {
    display: block;
  }

  .header__actions .btn--outline { display: none; }

  .burger { display: flex; }

  /* Hero mobile */
  .hero {
    padding: var(--space-10) 0 var(--space-12);
  }

  .hero__title { letter-spacing: -0.3px; }
  .hero__br { display: inline; }

  .hero__search-wrap {
    flex-wrap: wrap;
    gap: var(--space-2);
    padding: var(--space-3);
  }

  .hero__search-input { width: 100%; }
  .hero__search-btn   { width: 100%; justify-content: center; }

  .hero__visual { display: none; }

  /* Sections mobile */
  .section { padding: var(--space-10) 0; }

  .section__head {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
  }

  /* Categories mobile */
  .categories__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .category-card__link {
    padding: var(--space-4) var(--space-4);
    gap: var(--space-2);
  }

  .category-card__icon { width: 40px; height: 40px; }
  .category-card__icon svg { width: 20px; height: 20px; }
  .category-card__desc { display: none; }

  /* Articles mobile */
  .articles__grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  /* Calculators mobile */
  .calculators__grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  /* Trust mobile */
  .trust__grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .trust__text { padding: var(--space-5) var(--space-5) var(--space-5) var(--space-6); }

  /* FAQ mobile */
  .faq__container {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .faq-item__question {
    font-size: var(--text-sm);
  }

  /* Footer mobile */
  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    padding-top: var(--space-10);
    padding-bottom: var(--space-8);
  }

  .footer__nav {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }

  .footer__bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .footer__legal {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  /* Ad blocks mobile */
  .ad-block--leaderboard .ad-block__placeholder {
    height: 60px;
  }
}


/* ============================================================
   EXTRA SMALL (≤ 480px)
   ============================================================ */
@media (max-width: 480px) {
  .categories__grid {
    grid-template-columns: 1fr 1fr;
  }

  .hero__tags {
    gap: var(--space-1);
  }

  .tag {
    font-size: 12px;
    padding: 5px 10px;
  }

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


/* ============================================================
   GLOBAL ADDITIONS — shared across all page types
   ============================================================ */

/* — Back to Top — */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity var(--transition-base), transform var(--transition-base), background var(--transition-fast);
  z-index: 90;
  border: none;
}

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

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

@media (max-width: 768px) {
  .back-to-top { bottom: 20px; right: 16px; width: 40px; height: 40px; }
}

/* — Breadcrumbs — */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  padding: var(--space-5) 0 var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-light);
}

.breadcrumbs a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumbs a:hover { color: var(--color-accent); }

.breadcrumbs__sep { color: var(--color-border); user-select: none; }
.breadcrumbs__current { color: var(--color-text-muted); }

/* — SEO Text Block — */
.seo-text {
  background: var(--color-bg-white);
  border-top: 1px solid var(--color-border-light);
  padding: var(--space-12) 0;
}

.seo-text__title {
  font-size: clamp(18px, 2.5vw, 24px);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.seo-text__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}

.seo-text__col p {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.seo-text__col p:last-child { margin-bottom: 0; }

@media (max-width: 768px) {
  .seo-text__grid { grid-template-columns: 1fr; gap: var(--space-4); }
}