:root {
  --add-bg-primary: #101115;
  --add-bg-secondary: #181920;
  --add-bg-card: #18191f;
  --add-bg-card-hover: #23252d;
  --add-border-color: #1f2028;
  --add-border-light: #2f303a;
  --add-accent: #4865ff;
  --add-accent-hover: #668fff;
  --add-text-primary: #ffffff;
  --add-text-secondary: #c5c5d2;
  --add-text-muted: #8d92a3;
  --add-font-main: Roboto, "Open Sans", Helvetica, Arial, sans-serif;
  --add-font-display: Gramatika, sans-serif;
  --add-font-mono: "Roboto Mono", "DejaVu Sans Mono", monospace;
  --add-radius-sm: 8px;
  --add-radius-md: 16px;
  --add-radius-lg: 24px;
}

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

.add-page {
  background-color: var(--add-bg-primary);
  color: var(--add-text-primary);
  font-family: var(--add-font-main);
  font-size: 1.4rem;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

.add-page a {
  color: var(--add-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

.add-page a:hover,
.add-page a:focus {
  color: var(--add-accent-hover);
  text-decoration: underline;
}

/* ===== HEADER ===== */

.add-header {
  background-color: #101115;
  border-bottom: 1px solid var(--add-border-color);
  padding: 0 1.6rem;
}

.add-header__inner {
  align-items: center;
  display: flex;
  height: 7.9rem;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 1180px;
}

.add-header__logo {
  align-items: center;
  display: flex;
  gap: 1rem;
  text-decoration: none;
}

.add-header__logo-text {
  color: var(--add-text-primary);
  font-family: var(--add-font-display);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.add-header__logo-text:hover {
  color: var(--add-text-primary);
  text-decoration: none;
}

.add-header__nav {
  align-items: center;
  display: flex;
  gap: 2.4rem;
}

.add-header__nav-link {
  color: var(--add-text-secondary);
  font-family: var(--add-font-display);
  font-size: 1.4rem;
  text-decoration: none;
  transition: color 0.2s ease;
}

.add-header__nav-link:hover,
.add-header__nav-link:focus {
  color: var(--add-text-primary);
  text-decoration: none;
}

.add-header__nav-link--active {
  color: var(--add-text-primary);
  position: relative;
}

.add-header__nav-link--active::after {
  background: var(--add-accent);
  bottom: -0.6rem;
  content: "";
  display: block;
  height: 3px;
  left: 0;
  position: absolute;
  width: 100%;
}

/* ===== MAIN CONTENT WRAPPER ===== */

.add-main {
  margin: 0 auto;
  max-width: 1180px;
  padding: 4rem 1.6rem 8rem;
}

@media (min-width: 768px) {
  .add-main {
    padding: 5.6rem 1.6rem 10rem;
  }
}

/* ===== PAGE HERO ===== */

.add-hero {
  margin-bottom: 5.6rem;
}

.add-hero__breadcrumb {
  color: var(--add-text-muted);
  font-size: 1.2rem;
  font-family: var(--add-font-mono);
  letter-spacing: 0.04em;
  margin-bottom: 1.6rem;
  text-transform: uppercase;
}

.add-hero__breadcrumb a {
  color: var(--add-text-muted);
  transition: color 0.2s ease;
}

.add-hero__breadcrumb a:hover {
  color: var(--add-text-secondary);
  text-decoration: none;
}

.add-hero__breadcrumb span {
  margin: 0 0.6rem;
  opacity: 0.5;
}

.add-hero__h1 {
  color: var(--add-text-primary);
  font-family: var(--add-font-display);
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.6rem;
}

@media (min-width: 768px) {
  .add-hero__h1 {
    font-size: 4rem;
  }
}

.add-hero__subtitle {
  color: var(--add-text-secondary);
  font-size: 1.6rem;
  line-height: 1.6;
  max-width: 72rem;
}

/* ===== SECTION HEADINGS ===== */

.add-section {
  margin-bottom: 5.6rem;
}

.add-section__h2 {
  color: var(--add-text-primary);
  font-family: var(--add-font-display);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 2.4rem;
  padding-bottom: 1.2rem;
  position: relative;
}

.add-section__h2::after {
  background: var(--add-border-color);
  bottom: 0;
  content: "";
  display: block;
  height: 1px;
  left: 0;
  position: absolute;
  width: 100%;
}

.add-section__lead {
  color: var(--add-text-secondary);
  font-size: 1.5rem;
  line-height: 1.7;
  margin-bottom: 2.4rem;
  max-width: 80rem;
}

/* ===== QA LIST (questions page) ===== */

.add-qa-list {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  list-style: none;
}

.add-qa-item {
  background-color: var(--add-bg-card);
  border: 1px solid var(--add-border-color);
  border-radius: var(--add-radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.add-qa-item:hover {
  background-color: var(--add-bg-card-hover);
  border-color: var(--add-border-light);
}

.add-qa-item__question {
  color: var(--add-text-primary);
  font-family: var(--add-font-display);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.4;
  padding: 2rem 2.4rem 1.2rem;
}

.add-qa-item__answer {
  color: var(--add-text-secondary);
  font-size: 1.4rem;
  line-height: 1.7;
  padding: 0 2.4rem 2rem;
}

.add-qa-item__answer p + p {
  margin-top: 1rem;
}

.add-qa-item__answer a {
  color: var(--add-accent);
}

.add-qa-item__answer a:hover {
  color: var(--add-accent-hover);
}

/* ===== INFO SECTIONS ===== */

.add-info-block {
  background-color: var(--add-bg-card);
  border: 1px solid var(--add-border-color);
  border-radius: var(--add-radius-md);
  margin-bottom: 2.4rem;
  padding: 2.8rem 2.4rem;
  transition: border-color 0.2s ease;
}

.add-info-block:hover {
  border-color: var(--add-border-light);
}

.add-info-block__h2 {
  color: var(--add-text-primary);
  font-family: var(--add-font-display);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1.6rem;
}

.add-info-block__body {
  color: var(--add-text-secondary);
  font-size: 1.4rem;
  line-height: 1.7;
}

.add-info-block__body p + p {
  margin-top: 1.2rem;
}

.add-info-block__body a {
  color: var(--add-accent);
}

.add-info-block__body a:hover {
  color: var(--add-accent-hover);
}

/* ===== STATS GRID ===== */

.add-stats-grid {
  display: grid;
  gap: 1.6rem;
  grid-template-columns: repeat(2, 1fr);
  margin-bottom: 2.4rem;
}

@media (min-width: 768px) {
  .add-stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.add-stat-card {
  background-color: var(--add-bg-card);
  border: 1px solid var(--add-border-color);
  border-radius: var(--add-radius-md);
  padding: 2rem 1.6rem;
  text-align: center;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.add-stat-card:hover {
  background-color: var(--add-bg-card-hover);
  border-color: var(--add-border-light);
}

.add-stat-card__value {
  color: var(--add-text-primary);
  font-family: var(--add-font-display);
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 0.6rem;
}

.add-stat-card__label {
  color: var(--add-text-muted);
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ===== FEATURE CARDS ===== */

.add-feature-grid {
  display: grid;
  gap: 1.6rem;
  grid-template-columns: 1fr;
}

@media (min-width: 600px) {
  .add-feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .add-feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.add-feature-card {
  background-color: var(--add-bg-card);
  border: 1px solid var(--add-border-color);
  border-radius: var(--add-radius-md);
  padding: 2.4rem;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.add-feature-card:hover {
  background-color: var(--add-bg-card-hover);
  border-color: var(--add-border-light);
}

.add-feature-card__title {
  color: var(--add-text-primary);
  font-family: var(--add-font-display);
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
}

.add-feature-card__desc {
  color: var(--add-text-secondary);
  font-size: 1.4rem;
  line-height: 1.6;
}

/* ===== INLINE NAV LINKS ===== */

.add-inline-links {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.6rem;
  margin: 2.4rem 0;
}

.add-inline-link {
  align-items: center;
  background-color: var(--add-bg-card);
  border: 1px solid var(--add-border-light);
  border-radius: 50px;
  color: var(--add-text-secondary);
  display: inline-flex;
  font-size: 1.3rem;
  gap: 0.4rem;
  padding: 0.6rem 1.4rem;
  text-decoration: none;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.add-inline-link:hover,
.add-inline-link:focus {
  background-color: var(--add-bg-card-hover);
  border-color: var(--add-accent);
  color: var(--add-text-primary);
  text-decoration: none;
}

/* ===== RETURN HOME BUTTON ===== */

.add-home-btn {
  align-items: center;
  background-color: var(--add-accent);
  border: none;
  border-radius: 50px;
  color: #ffffff;
  cursor: pointer;
  display: inline-flex;
  font-family: var(--add-font-main);
  font-size: 1.4rem;
  font-weight: 700;
  gap: 0.6rem;
  line-height: 2rem;
  padding: 1.2rem 2.4rem;
  text-decoration: none;
  transition: background-color 0.2s ease;
  white-space: nowrap;
}

.add-home-btn:hover,
.add-home-btn:focus {
  background-color: var(--add-accent-hover);
  color: #ffffff;
  text-decoration: none;
}

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

.add-home-btn--outline:hover,
.add-home-btn--outline:focus {
  background-color: var(--add-bg-card-hover);
  border-color: var(--add-accent);
  color: var(--add-text-primary);
}

.add-cta-row {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin-top: 4rem;
}

/* ===== DIVIDER ===== */

.add-divider {
  background: var(--add-border-color);
  border: none;
  height: 1px;
  margin: 4rem 0;
}

/* ===== TAG BADGE ===== */

.add-badge {
  align-items: center;
  background-color: rgba(72, 101, 255, 0.15);
  border: 1px solid rgba(72, 101, 255, 0.3);
  border-radius: 4px;
  color: var(--add-accent-hover);
  display: inline-flex;
  font-size: 1.1rem;
  font-weight: 700;
  gap: 0.4rem;
  letter-spacing: 0.05em;
  padding: 0.3rem 0.8rem;
  text-transform: uppercase;
}

/* ===== FOOTER ===== */

.add-footer {
  background-color: #19191f;
  border-top: 1px solid var(--add-border-color);
  color: var(--add-text-secondary);
  font-size: 1.3rem;
  margin-top: auto;
  padding: 4rem 1.6rem;
}

.add-footer__inner {
  align-items: flex-start;
  display: flex;
  flex-direction: column;
  gap: 2.4rem;
  margin: 0 auto;
  max-width: 1180px;
}

@media (min-width: 768px) {
  .add-footer__inner {
    align-items: center;
    flex-direction: row;
    justify-content: space-between;
  }
}

.add-footer__copy {
  color: var(--add-text-muted);
  font-size: 1.2rem;
}

.add-footer__links {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 2rem;
  list-style: none;
}

.add-footer__links a {
  color: var(--add-text-muted);
  font-size: 1.3rem;
  text-decoration: underline transparent;
  text-underline-offset: 0.3em;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.add-footer__links a:hover,
.add-footer__links a:focus {
  color: var(--add-text-secondary);
  text-decoration-color: var(--add-text-secondary);
}

/* ===== PROSE TEXT ===== */

.add-prose {
  color: var(--add-text-secondary);
  font-size: 1.4rem;
  line-height: 1.75;
  max-width: 80rem;
}

.add-prose p + p {
  margin-top: 1.4rem;
}

.add-prose h3 {
  color: var(--add-text-primary);
  font-family: var(--add-font-display);
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  margin-top: 2.4rem;
}

.add-prose ul {
  margin: 1rem 0 1rem 2rem;
}

.add-prose li {
  margin-bottom: 0.6rem;
}

.add-prose strong {
  color: var(--add-text-primary);
  font-weight: 700;
}

.add-prose a {
  color: var(--add-accent);
}

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

/* ===== NUMBER LIST ===== */

.add-numbered-list {
  counter-reset: add-counter;
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  list-style: none;
}

.add-numbered-item {
  align-items: flex-start;
  background-color: var(--add-bg-card);
  border: 1px solid var(--add-border-color);
  border-radius: var(--add-radius-md);
  counter-increment: add-counter;
  display: flex;
  gap: 1.6rem;
  padding: 2rem 2.4rem;
  transition: border-color 0.2s ease;
}

.add-numbered-item:hover {
  border-color: var(--add-border-light);
}

.add-numbered-item::before {
  align-items: center;
  background: rgba(72, 101, 255, 0.15);
  border: 1px solid rgba(72, 101, 255, 0.3);
  border-radius: 50%;
  color: var(--add-accent-hover);
  content: counter(add-counter);
  display: flex;
  flex-shrink: 0;
  font-family: var(--add-font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  height: 3.2rem;
  justify-content: center;
  margin-top: 0.2rem;
  width: 3.2rem;
}

.add-numbered-item__title {
  color: var(--add-text-primary);
  font-family: var(--add-font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.add-numbered-item__text {
  color: var(--add-text-secondary);
  font-size: 1.4rem;
  line-height: 1.6;
}

/* ===== HIGHLIGHT BOX ===== */

.add-highlight {
  background-color: rgba(72, 101, 255, 0.08);
  border: 1px solid rgba(72, 101, 255, 0.25);
  border-left: 4px solid var(--add-accent);
  border-radius: var(--add-radius-sm);
  color: var(--add-text-secondary);
  font-size: 1.4rem;
  line-height: 1.7;
  margin: 2.4rem 0;
  padding: 1.6rem 2rem;
}

.add-highlight strong {
  color: var(--add-text-primary);
}

/* ===== RESPONSIVE UTILITIES ===== */

@media (max-width: 599px) {
  .add-hero__h1 {
    font-size: 2.6rem;
  }

  .add-section__h2 {
    font-size: 2rem;
  }

  .add-info-block {
    padding: 2rem 1.6rem;
  }

  .add-qa-item__question {
    font-size: 1.5rem;
    padding: 1.6rem 1.6rem 1rem;
  }

  .add-qa-item__answer {
    padding: 0 1.6rem 1.6rem;
  }

  .add-stat-card__value {
    font-size: 2.2rem;
  }

  .add-main {
    padding: 3.2rem 1.6rem 6.4rem;
  }
}