@layer reset, tokens, layout, components, utilities;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: hidden; }
  body { min-height: 100vh; line-height: 1.6; -webkit-font-smoothing: antialiased; }
  img, video { max-width: 100%; display: block; }
  input, button, textarea, select { font: inherit; }
  a { color: inherit; text-decoration: none; }
  ul, ol { list-style: none; }
  button { cursor: pointer; border: none; background: none; }
}

@layer tokens {
  :root {
    --color-bg: #f7f5f0;
    --color-paper: #fdfcf8;
    --color-paper-warm: #f9f6ef;
    --color-paper-accent: #eef4f0;
    --color-paper-dark: #1e2832;
    --color-primary: #2d6a4f;
    --color-primary-dark: #1b4332;
    --color-primary-light: #52b788;
    --color-accent: #d4a017;
    --color-accent-light: #f0c040;
    --color-text: #1e2832;
    --color-text-mid: #3d4b5a;
    --color-text-light: #6b7a8d;
    --color-border: #ddd8cc;
    --color-border-light: #eceae3;

    --shadow-paper: 0 -4px 0 0 rgba(0,0,0,0.04), 0 8px 24px rgba(0,0,0,0.07);
    --shadow-card: 0 2px 4px rgba(0,0,0,0.04), 0 8px 20px rgba(0,0,0,0.08);
    --shadow-card-hover: 0 4px 8px rgba(0,0,0,0.06), 0 16px 40px rgba(0,0,0,0.12);
    --shadow-nav: 0 1px 0 rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.08);
    --shadow-deep: 0 2px 4px rgba(0,0,0,0.04), 0 8px 20px rgba(0,0,0,0.08), 0 24px 60px rgba(0,0,0,0.1);

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;

    --font-sans: 'Nunito Sans', system-ui, sans-serif;
    --nav-height: 72px;

    --transition-fast: 150ms ease-out;
    --transition-base: 250ms ease-out;
    --transition-slow: 400ms ease-out;
  }
}

@layer layout {
  body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    font-size: 1rem;
    line-height: 1.7;
  }

  .u-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
  }

  .s-paper {
    background: var(--color-paper);
    box-shadow: var(--shadow-paper);
    position: relative;
    z-index: 1;
  }

  .s-paper--warm { background: var(--color-paper-warm); }
  .s-paper--accent { background: var(--color-paper-accent); }
  .s-paper--dark { background: var(--color-paper-dark); }
}

@layer components {

  
  .c-cookie-bar {
    background: var(--color-primary-dark);
    color: #fff;
    padding: 10px var(--space-md);
    position: relative;
    z-index: 1000;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease, opacity 0.4s ease;
    max-height: fit-content;
  }
  .c-cookie-bar.is-hidden {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    opacity: 0;
    pointer-events: none;
  }
  .c-cookie-bar__inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
  }
  .c-cookie-bar__text {
    flex: 1;
    font-size: 0.875rem;
    min-width: 200px;
  }
  .c-cookie-bar__text a { color: var(--color-accent-light); text-decoration: underline; }
  .c-cookie-bar__actions { display: flex; gap: 8px; }
  .c-cookie-bar__btn {
    padding: 6px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 600;
    transition: all var(--transition-base);
    min-height: 32px;
  }
  .c-cookie-bar__btn--accept {
    background: var(--color-primary-light);
    color: #fff;
  }
  .c-cookie-bar__btn--accept:hover { background: #40916c; }
  .c-cookie-bar__btn--decline {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.4);
    color: #fff;
  }
  .c-cookie-bar__btn--decline:hover { background: rgba(255,255,255,0.1); }

  
  .c-nav {
    position: sticky;
    top: 0;
    z-index: 900;
    background: transparent;
    transition: background var(--transition-base), box-shadow var(--transition-base);
    height: var(--nav-height);
  }
  .c-nav.is-scrolled {
    background: rgba(253, 252, 248, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }
  .c-nav__border-line {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    transform-origin: center;
    width: 100%;
    height: 1px;
    background: var(--color-border);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .c-nav.is-scrolled .c-nav__border-line { transform: translateX(-50%) scaleX(1); }
  .c-nav__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    height: 100%;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    position: relative;
  }
  .c-nav__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
  }
  .c-nav__logo-img { width: 36px; height: 36px; }
  .c-nav__logo-text {
    font-size: 1.125rem;
    font-weight: 800;
    color: var(--color-primary-dark);
    letter-spacing: -0.02em;
  }
  .c-nav__links {
    display: none;
    align-items: center;
    gap: var(--space-xs);
    margin-left: auto;
  }
  .c-nav__link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-mid);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    position: relative;
    transition: color var(--transition-base);
  }
  .c-nav__link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 12px;
    right: 12px;
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--transition-base);
    border-radius: 2px;
  }
  .c-nav__link:hover { color: var(--color-primary); }
  .c-nav__link:hover::after { transform: scaleX(1); }
  .c-nav__link.is-active { color: var(--color-primary); }
  .c-nav__link.is-active::after { transform: scaleX(1); }
  .c-nav__hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    margin-left: auto;
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
  }
  .c-nav__hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-base);
  }
  .c-nav__hamburger.is-active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .c-nav__hamburger.is-active span:nth-child(2) { opacity: 0; }
  .c-nav__hamburger.is-active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

  
  .c-mobile-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 950;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-slow);
  }
  .c-mobile-overlay.is-active { opacity: 1; pointer-events: all; }
  .c-mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 80%;
    max-width: 360px;
    height: 100vh;
    background: var(--color-paper);
    z-index: 960;
    transform: translateX(-100%);
    transition: transform var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
    padding: var(--space-xl) var(--space-lg);
    box-shadow: var(--shadow-deep);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
  }
  .c-mobile-menu.is-active { transform: translateX(0); }
  .c-mobile-menu__close {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-mid);
    font-size: 1.25rem;
    transition: color var(--transition-base);
  }
  .c-mobile-menu__close:hover { color: var(--color-primary); }
  .c-mobile-menu__links { display: flex; flex-direction: column; gap: 4px; margin-top: var(--space-lg); }
  .c-mobile-menu__links li {
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.3s ease calc(var(--i) * 60ms), transform 0.3s ease calc(var(--i) * 60ms);
  }
  .c-mobile-menu.is-active .c-mobile-menu__links li {
    opacity: 1;
    transform: translateX(0);
  }
  .c-mobile-menu__links a {
    display: block;
    padding: 12px var(--space-sm);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
  }
  .c-mobile-menu__links a:hover { background: var(--color-paper-warm); color: var(--color-primary); }
  .c-mobile-menu__cta { margin-top: auto; }

  
  .c-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-weight: 700;
    text-decoration: none;
    transition: all var(--transition-base);
    cursor: pointer;
    border: 2px solid transparent;
    min-height: 44px;
    white-space: nowrap;
  }
  .c-btn--primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(45, 106, 79, 0.3);
  }
  .c-btn--primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(45, 106, 79, 0.4);
  }
  .c-btn--primary:active { transform: translateY(0); }
  .c-btn--outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
  }
  .c-btn--outline:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
  }
  .c-btn--ghost {
    background: rgba(255,255,255,0.15);
    color: #fff;
    border-color: rgba(255,255,255,0.5);
    backdrop-filter: blur(8px);
  }
  .c-btn--ghost:hover {
    background: rgba(255,255,255,0.25);
    border-color: rgba(255,255,255,0.8);
    transform: translateY(-2px);
  }
  .c-btn--ghost-light {
    background: transparent;
    color: #fff;
    border-color: rgba(255,255,255,0.6);
  }
  .c-btn--ghost-light:hover {
    background: rgba(255,255,255,0.1);
    border-color: #fff;
  }
  .c-btn--nav {
    background: var(--color-primary);
    color: #fff;
    padding: 8px 18px;
    font-size: 0.875rem;
    display: none;
  }
  .c-btn--nav:hover { background: var(--color-primary-dark); }
  .c-btn--full { width: 100%; justify-content: center; }

  
  .s-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
  }
  .s-hero__bg {
    position: absolute;
    inset: 0;
    z-index: 0;
  }
  .s-hero__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
  }
  .s-hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(27, 67, 50, 0.88) 0%, rgba(30, 40, 50, 0.75) 60%, rgba(30, 40, 50, 0.6) 100%);
  }
  .s-hero__content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--space-3xl) var(--space-md);
    max-width: 900px;
    margin: 0 auto;
  }
  .s-hero__badge {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
    color: rgba(255,255,255,0.9);
    padding: 6px 20px;
    border-radius: 100px;
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: var(--space-md);
    backdrop-filter: blur(8px);
  }
  .s-hero__heading {
    font-size: clamp(2.25rem, 5vw, 4rem);
    font-weight: 800;
    color: #fff;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-md);
  }
  .u-accent { color: var(--color-accent-light); }
  .s-hero__subheading {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: rgba(255,255,255,0.82);
    max-width: 680px;
    margin: 0 auto var(--space-lg);
    line-height: 1.7;
    font-weight: 400;
  }
  .s-hero__ctas { display: flex; gap: var(--space-sm); justify-content: center; flex-wrap: wrap; }
  .s-hero__scroll-hint {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    color: rgba(255,255,255,0.6);
    font-size: 1rem;
    animation: bounce 2s infinite;
  }
  @keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
  }

  
  .s-intro { padding: var(--space-2xl) 0; }
  .s-intro__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    align-items: center;
  }
  .s-intro__heading {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    color: var(--color-text);
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
  }
  .s-intro__text p {
    color: var(--color-text-mid);
    margin-bottom: var(--space-sm);
    font-size: 1.0625rem;
  }
  .s-intro__text .c-btn { margin-top: var(--space-md); }

  
  .c-paper-stack {
    position: relative;
    height: 380px;
  }
  .c-paper-stack__sheet {
    position: absolute;
    border-radius: var(--radius-lg);
    overflow: hidden;
  }
  .c-paper-stack__sheet--3 {
    inset: 16px -8px -8px 8px;
    background: var(--color-border-light);
    box-shadow: var(--shadow-card);
    transform: rotate(3deg);
  }
  .c-paper-stack__sheet--2 {
    inset: 8px -4px -4px 4px;
    background: var(--color-paper-warm);
    box-shadow: var(--shadow-card);
    transform: rotate(1.5deg);
  }
  .c-paper-stack__sheet--1 {
    inset: 0;
    background: var(--color-paper);
    box-shadow: var(--shadow-deep);
  }
  .c-paper-stack__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  
  .s-topics { padding: var(--space-2xl) 0; }
  .s-topics__header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto var(--space-xl);
  }
  .s-topics__heading {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    color: var(--color-text);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
  }
  .s-topics__intro { color: var(--color-text-mid); font-size: 1.0625rem; }
  .s-topics__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  .c-topic-card {
    background: var(--color-paper);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-card);
    transition: all var(--transition-slow);
    border: 1px solid var(--color-border-light);
    position: relative;
    overflow: hidden;
  }
  .c-topic-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card-hover);
  }
  .c-topic-card__icon {
    width: 52px;
    height: 52px;
    background: var(--color-paper-accent);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
    transition: all var(--transition-base);
  }
  .c-topic-card:hover .c-topic-card__icon {
    background: var(--color-primary);
    color: #fff;
  }
  .c-topic-card__title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    line-height: 1.3;
  }
  .c-topic-card__body {
    color: var(--color-text-mid);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: var(--space-md);
  }
  .c-topic-card__link {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap var(--transition-base), color var(--transition-base);
  }
  .c-topic-card__link:hover { gap: 10px; color: var(--color-primary-dark); }

  
  .c-topic-card--animated-border {
    background: var(--color-paper);
    position: relative;
  }
  .c-topic-card--animated-border::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    padding: 2px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent), var(--color-primary-light), var(--color-primary));
    background-size: 300% 300%;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-slow);
    animation: none;
  }
  .c-topic-card--animated-border:hover::before {
    opacity: 1;
    animation: borderDraw 2s linear infinite;
  }
  @keyframes borderDraw {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }

  
  .s-zigzag { padding: var(--space-2xl) 0; }
  .s-zigzag__block {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    align-items: center;
  }
  .s-zigzag__img-wrap {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-deep);
    position: relative;
  }
  .s-zigzag__img-wrap::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.06);
  }
  .s-zigzag__img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: transform var(--transition-slow);
    display: block;
  }
  .s-zigzag__img-wrap:hover .s-zigzag__img { transform: scale(1.03); }
  .s-zigzag__content span.u-label { margin-bottom: var(--space-xs); }
  .s-zigzag__content h2 {
    font-size: clamp(1.5rem, 2.5vw, 2.25rem);
    font-weight: 800;
    color: var(--color-text);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
    line-height: 1.2;
  }
  .s-zigzag__content p {
    color: var(--color-text-mid);
    margin-bottom: var(--space-sm);
    font-size: 1rem;
    line-height: 1.75;
  }

  
  .c-highlight-box {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-start;
    background: var(--color-paper-accent);
    border-left: 3px solid var(--color-primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: var(--space-md);
    margin-top: var(--space-md);
  }
  .c-highlight-box i { color: var(--color-accent); font-size: 1.125rem; flex-shrink: 0; margin-top: 2px; }
  .c-highlight-box p { margin: 0; font-size: 0.9375rem; color: var(--color-text-mid); }

  
  .s-attributes { padding: var(--space-2xl) 0; }
  .s-attributes__header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto var(--space-xl);
  }
  .s-attributes__header h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
  }
  .s-attributes__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  .c-attr-card {
    background: var(--color-paper);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-slow);
  }
  .c-attr-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
  .c-attr-card__tag {
    display: inline-block;
    background: var(--color-primary-dark);
    color: #fff;
    font-family: 'Courier New', monospace;
    font-size: 0.8125rem;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
    letter-spacing: 0.02em;
  }
  .c-attr-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
  }
  .c-attr-card p {
    font-size: 0.9375rem;
    color: var(--color-text-mid);
    line-height: 1.7;
    margin-bottom: var(--space-xs);
  }

  
  .s-audience { padding: var(--space-2xl) 0; }
  .s-audience__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    align-items: start;
  }
  .s-audience__content h2 {
    font-size: clamp(1.5rem, 2.5vw, 2.25rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
    line-height: 1.2;
  }
  .s-audience__content p {
    color: var(--color-text-mid);
    margin-bottom: var(--space-sm);
    font-size: 1rem;
    line-height: 1.75;
  }
  .s-audience__content .c-btn { margin-top: var(--space-md); }
  .s-audience__cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }
  .c-audience-card {
    background: var(--color-paper);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border-light);
    display: flex;
    gap: var(--space-sm);
    align-items: flex-start;
    transition: all var(--transition-base);
  }
  .c-audience-card:hover { transform: translateX(4px); box-shadow: var(--shadow-card-hover); }
  .c-audience-card i {
    font-size: 1.25rem;
    color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 2px;
    width: 32px;
  }
  .c-audience-card h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--color-text);
  }
  .c-audience-card p { font-size: 0.875rem; color: var(--color-text-mid); line-height: 1.6; }

  
  .s-youtube-teaser { padding: var(--space-2xl) 0; }
  .s-youtube-teaser__inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    align-items: center;
  }
  .s-youtube-teaser__content h2 {
    font-size: clamp(1.5rem, 2.5vw, 2.25rem);
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
    line-height: 1.2;
  }
  .s-youtube-teaser__content p {
    color: rgba(255,255,255,0.78);
    margin-bottom: var(--space-md);
    line-height: 1.75;
  }
  .s-youtube-teaser__img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-deep);
    width: 100%;
    height: 280px;
    object-fit: cover;
  }

  
  .s-articles { padding: var(--space-2xl) 0; }
  .s-articles__header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-xl);
  }
  .s-articles__header h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
  }
  .s-articles__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  .c-article-card {
    background: var(--color-paper);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-slow);
    display: flex;
    flex-direction: column;
  }
  .c-article-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
  .c-article-card__category {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
  }
  .c-article-card__title {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    line-height: 1.4;
  }
  .c-article-card__excerpt {
    font-size: 0.9375rem;
    color: var(--color-text-mid);
    line-height: 1.7;
    flex: 1;
    margin-bottom: var(--space-md);
  }
  .c-article-card__link {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap var(--transition-base);
    margin-top: auto;
  }
  .c-article-card__link:hover { gap: 10px; }

  
  .c-sidebar-cta {
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 800;
  }
  .c-sidebar-cta__btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    background: var(--color-primary);
    color: #fff;
    padding: 14px 10px;
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    box-shadow: var(--shadow-deep);
    transition: all var(--transition-base);
    text-decoration: none;
  }
  .c-sidebar-cta__btn:hover {
    background: var(--color-primary-dark);
    padding-left: 14px;
  }
  .c-sidebar-cta__btn i { font-size: 1.125rem; }
  .c-sidebar-cta__label { font-size: 0.6875rem; font-weight: 700; letter-spacing: 0.05em; writing-mode: vertical-lr; text-orientation: mixed; transform: rotate(180deg); }

  
  .s-page-hero {
    padding: calc(var(--nav-height) + var(--space-xl)) 0 var(--space-xl);
  }
  .s-page-hero__content { max-width: 760px; }
  .s-page-hero__heading {
    font-size: clamp(2rem, 4vw, 3.25rem);
    font-weight: 800;
    color: var(--color-text);
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: var(--space-md);
  }
  .s-page-hero__sub {
    font-size: 1.125rem;
    color: var(--color-text-mid);
    line-height: 1.7;
    max-width: 680px;
  }

  
  .u-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
  }
  .u-label--light { color: var(--color-primary-light); }

  
  .s-content { padding: var(--space-2xl) 0; }
  .s-content__layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    align-items: start;
  }
  .c-content-block {
    margin-bottom: var(--space-xl);
  }
  .c-content-block h2 {
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    font-weight: 800;
    color: var(--color-text);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
    line-height: 1.2;
  }
  .c-content-block p {
    color: var(--color-text-mid);
    margin-bottom: var(--space-sm);
    font-size: 1rem;
    line-height: 1.8;
  }
  .c-content-block__img {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-deep);
    width: 100%;
    height: 280px;
    object-fit: cover;
    margin-bottom: var(--space-lg);
  }

  
  .c-tool-list { display: flex; flex-direction: column; gap: var(--space-md); margin-top: var(--space-md); }
  .c-tool-item {
    border-left: 3px solid var(--color-primary-light);
    padding-left: var(--space-md);
  }
  .c-tool-item__label {
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    background: var(--color-paper-accent);
    display: inline-block;
    padding: 2px 10px;
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
  }
  .c-tool-item p { font-size: 0.9375rem; color: var(--color-text-mid); line-height: 1.7; margin: 0; }

  
  .c-sidebar-card {
    background: var(--color-paper);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border-light);
    margin-bottom: var(--space-md);
  }
  .c-sidebar-card--accent { background: var(--color-paper-accent); border-color: var(--color-primary-light); }
  .c-sidebar-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: var(--space-sm); color: var(--color-text); }
  .c-sidebar-card p { font-size: 0.9rem; color: var(--color-text-mid); margin-bottom: var(--space-sm); line-height: 1.65; }
  .c-sidebar-card .c-btn { width: 100%; justify-content: center; }
  .c-concept-list { display: flex; flex-direction: column; gap: 4px; }
  .c-concept-list li a {
    display: block;
    font-size: 0.9rem;
    color: var(--color-primary);
    padding: 6px 0;
    border-bottom: 1px solid var(--color-border-light);
    transition: color var(--transition-base), padding-left var(--transition-base);
    font-weight: 600;
  }
  .c-concept-list li:last-child a { border-bottom: none; }
  .c-concept-list li a:hover { padding-left: 6px; color: var(--color-primary-dark); }

  
  .s-lib-nav { padding: var(--space-md) 0; border-bottom: 1px solid var(--color-border); }
  .s-lib-nav__tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
  }
  .s-lib-nav__tab {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-mid);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    min-height: 44px;
    display: flex;
    align-items: center;
  }
  .s-lib-nav__tab:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
  .s-lib-section { padding: var(--space-2xl) 0; }
  .s-lib-section__header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--color-border-light);
  }
  .s-lib-section__icon {
    width: 56px;
    height: 56px;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
  }
  .s-lib-section__header h2 {
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 6px;
  }
  .s-lib-section__header p { color: var(--color-text-mid); font-size: 1rem; }
  .s-lib-section__articles { display: flex; flex-direction: column; gap: var(--space-xl); }
  .c-lib-article h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-md);
    line-height: 1.3;
  }
  .c-lib-article p {
    color: var(--color-text-mid);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: var(--space-sm);
  }

  
  .s-lib-section__table-wrap { overflow-x: auto; margin-bottom: var(--space-xl); }
  .c-attr-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
    background: var(--color-paper);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-card);
  }
  .c-attr-table th {
    background: var(--color-primary-dark);
    color: #fff;
    padding: 14px 16px;
    text-align: left;
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.02em;
  }
  .c-attr-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text-mid);
    vertical-align: top;
  }
  .c-attr-table tr:last-child td { border-bottom: none; }
  .c-attr-table tr:nth-child(even) td { background: var(--color-paper-warm); }
  .c-attr-table code {
    font-family: 'Courier New', monospace;
    background: var(--color-paper-accent);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.875rem;
    color: var(--color-primary-dark);
    font-weight: 700;
  }

  
  .s-contact { padding: var(--space-2xl) 0; }
  .s-contact__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    align-items: start;
  }
  .s-contact__form-wrap h2 {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: var(--space-lg);
    color: var(--color-text);
  }
  .c-contact-form { display: flex; flex-direction: column; gap: var(--space-md); }
  .c-form-group { display: flex; flex-direction: column; gap: 6px; }
  .c-form-label { font-size: 0.875rem; font-weight: 700; color: var(--color-text); }
  .c-form-input {
    padding: 12px 16px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-paper);
    color: var(--color-text);
    font-size: 1rem;
    transition: all var(--transition-base);
    min-height: 44px;
  }
  .c-form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.12);
  }
  .c-form-textarea { min-height: 140px; resize: vertical; }
  .c-form-group--checkbox { flex-direction: row; align-items: flex-start; gap: var(--space-sm); }
  .c-form-checkbox { display: flex; align-items: flex-start; gap: 10px; cursor: pointer; }
  .c-form-checkbox input[type="checkbox"] { display: none; }
  .c-form-checkbox__mark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-radius: 4px;
    flex-shrink: 0;
    margin-top: 2px;
    transition: all var(--transition-base);
    position: relative;
  }
  .c-form-checkbox input:checked + .c-form-checkbox__mark {
    background: var(--color-primary);
    border-color: var(--color-primary);
  }
  .c-form-checkbox input:checked + .c-form-checkbox__mark::after {
    content: '';
    position: absolute;
    left: 4px;
    top: 1px;
    width: 8px;
    height: 12px;
    border: 2px solid #fff;
    border-top: none;
    border-left: none;
    transform: rotate(45deg);
  }
  .c-form-checkbox__text { font-size: 0.875rem; color: var(--color-text-mid); line-height: 1.5; }
  .c-form-checkbox__text a { color: var(--color-primary); text-decoration: underline; }
  .c-form-error {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 0.875rem;
    font-weight: 600;
  }
  .c-contact-info-card {
    background: var(--color-paper);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border-light);
    margin-bottom: var(--space-md);
  }
  .c-contact-info-card h2 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: var(--space-lg);
    color: var(--color-text);
  }
  .c-contact-detail {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-start;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border-light);
  }
  .c-contact-detail:last-child { border-bottom: none; margin-bottom: 0; }
  .c-contact-detail__icon {
    width: 40px;
    height: 40px;
    background: var(--color-paper-accent);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    flex-shrink: 0;
  }
  .c-contact-detail strong { display: block; font-size: 0.8125rem; font-weight: 700; color: var(--color-text); margin-bottom: 2px; }
  .c-contact-detail p { font-size: 0.9375rem; color: var(--color-text-mid); margin: 0; }
  .c-contact-detail a { color: var(--color-primary); transition: color var(--transition-base); }
  .c-contact-detail a:hover { color: var(--color-primary-dark); }
  .c-map-wrap { border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-card); }

  
  .s-newsletter { padding: var(--space-2xl) 0; }
  .s-newsletter__inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    align-items: center;
  }
  .s-newsletter__content h2 {
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
  }
  .s-newsletter__content p { color: var(--color-text-mid); line-height: 1.75; }
  .c-newsletter-form__row {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
  }
  .c-newsletter-form__row .c-form-input { flex: 1; min-width: 200px; }
  .c-newsletter-form__note { font-size: 0.8125rem; color: var(--color-text-light); margin-top: var(--space-sm); }
  .c-newsletter-form__note a { color: var(--color-primary); }

  
  .s-thanks {
    min-height: 70vh;
    display: flex;
    align-items: center;
    padding: var(--space-3xl) 0;
    background: var(--color-paper);
  }
  .s-thanks__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-xl);
    max-width: 600px;
    margin: 0 auto;
  }
  .s-thanks__check { width: 120px; height: 120px; }
  .c-check-svg { width: 100%; height: 100%; }
  .c-check-svg__circle {
    stroke-dasharray: 289;
    stroke-dashoffset: 289;
    animation: drawCircle 0.8s ease-out 0.2s forwards;
  }
  .c-check-svg__check {
    stroke-dasharray: 80;
    stroke-dashoffset: 80;
    animation: drawCheck 0.5s ease-out 1s forwards;
  }
  @keyframes drawCircle {
    to { stroke-dashoffset: 0; }
  }
  @keyframes drawCheck {
    to { stroke-dashoffset: 0; }
  }
  .s-thanks__heading {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    color: var(--color-text);
    opacity: 0;
    animation: fadeInUp 0.5s ease-out 1.5s forwards;
  }
  .s-thanks__body {
    color: var(--color-text-mid);
    font-size: 1.0625rem;
    opacity: 0;
    animation: fadeInUp 0.5s ease-out 1.7s forwards;
  }
  .s-thanks__inner .c-btn {
    opacity: 0;
    animation: fadeInUp 0.5s ease-out 1.9s forwards;
  }
  @keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
  }

  
  .s-yt-intro {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    align-items: center;
    margin-bottom: var(--space-2xl);
  }
  .s-yt-intro__img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-deep);
    width: 100%;
    height: 280px;
    object-fit: cover;
  }
  .s-yt-intro__text h2 {
    font-size: clamp(1.5rem, 2.5vw, 2.25rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
    color: var(--color-text);
  }
  .s-yt-intro__text p { color: var(--color-text-mid); margin-bottom: var(--space-sm); line-height: 1.75; }
  .s-yt-blocks { display: flex; flex-direction: column; gap: var(--space-2xl); }
  .c-yt-block { }
  .c-yt-block__icon {
    width: 52px;
    height: 52px;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
  }
  .c-yt-block h2 {
    font-size: clamp(1.375rem, 2.5vw, 1.875rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
    color: var(--color-text);
  }
  .c-yt-block p { color: var(--color-text-mid); margin-bottom: var(--space-sm); line-height: 1.8; }
  .c-yt-comparison {
    background: var(--color-paper);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-card);
  }
  .c-yt-comparison h2 {
    font-size: clamp(1.375rem, 2.5vw, 1.875rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-xl);
    color: var(--color-text);
  }
  .c-yt-comparison__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  .c-yt-comparison__col {
    background: var(--color-paper-warm);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    border: 1px solid var(--color-border-light);
  }
  .c-yt-comparison__col h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .c-yt-comparison__col h3 i { color: var(--color-primary); }
  .c-yt-comparison__col ul { display: flex; flex-direction: column; gap: 10px; }
  .c-yt-comparison__col li {
    font-size: 0.9375rem;
    color: var(--color-text-mid);
    padding-left: 20px;
    position: relative;
    line-height: 1.5;
  }
  .c-yt-comparison__col li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-primary-light);
  }
  .c-yt-cta-block {
    max-width: 760px;
    margin: 0 auto;
    text-align: center;
  }
  .c-yt-cta-block h2 {
    font-size: clamp(1.5rem, 2.5vw, 2.25rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
    color: var(--color-text);
  }
  .c-yt-cta-block p { color: var(--color-text-mid); margin-bottom: var(--space-sm); line-height: 1.75; }
  .c-yt-cta-block__actions {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--space-lg);
  }

  
  .s-legal { padding: var(--space-2xl) 0; }
  .s-legal__body { max-width: 860px; }
  .s-legal__body p {
    color: var(--color-text-mid);
    line-height: 1.8;
    margin-bottom: var(--space-md);
    font-size: 1rem;
  }
  .s-legal__body h2 {
    font-size: 1.375rem;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    margin-top: var(--space-xl);
    letter-spacing: -0.01em;
  }
  .s-legal__body h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    margin-top: var(--space-lg);
  }
  .s-legal__body a { color: var(--color-primary); text-decoration: underline; }
  .s-legal__body strong { color: var(--color-text); }
  .c-legal-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-md) 0 var(--space-xl);
    font-size: 0.9rem;
    box-shadow: var(--shadow-card);
    border-radius: var(--radius-md);
    overflow: hidden;
  }
  .c-legal-table th {
    background: var(--color-primary-dark);
    color: #fff;
    padding: 12px 14px;
    text-align: left;
    font-weight: 700;
    font-size: 0.8125rem;
  }
  .c-legal-table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text-mid);
    vertical-align: top;
    line-height: 1.65;
  }
  .c-legal-table tr:last-child td { border-bottom: none; }
  .c-legal-table tr:nth-child(even) td { background: var(--color-paper-warm); }
  .c-legal-table code {
    font-family: 'Courier New', monospace;
    background: var(--color-paper-accent);
    padding: 1px 6px;
    border-radius: 3px;
    font-size: 0.85rem;
    color: var(--color-primary-dark);
  }
  .c-definition-list { margin: var(--space-lg) 0; }
  .c-definition-list dt {
    font-weight: 800;
    color: var(--color-text);
    font-size: 1rem;
    margin-top: var(--space-md);
    padding-left: var(--space-sm);
    border-left: 3px solid var(--color-primary);
  }
  .c-definition-list dd {
    color: var(--color-text-mid);
    font-size: 0.9375rem;
    line-height: 1.7;
    padding-left: var(--space-md);
    margin-top: 4px;
    margin-bottom: var(--space-sm);
  }

  
  .c-footer {
    background: var(--color-paper-dark);
    padding: var(--space-2xl) 0 var(--space-lg);
    margin-top: auto;
  }
  .c-footer__inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .c-footer__brand {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  .c-footer__logo { width: 40px; height: 40px; }
  .c-footer__brand-name {
    font-size: 1.125rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.02em;
  }
  .c-footer__tagline { font-size: 0.875rem; color: rgba(255,255,255,0.5); line-height: 1.5; max-width: 260px; }
  .c-footer__nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  .c-footer__nav a {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.65);
    transition: color var(--transition-base);
    font-weight: 500;
  }
  .c-footer__nav a:hover { color: #fff; }
  .c-footer__contact { display: flex; flex-direction: column; gap: 8px; }
  .c-footer__contact p {
    font-size: 0.875rem;
    color: rgba(255,255,255,0.55);
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .c-footer__contact i { color: var(--color-primary-light); width: 16px; }
  .c-footer__contact a { color: rgba(255,255,255,0.7); transition: color var(--transition-base); }
  .c-footer__contact a:hover { color: #fff; }
  .c-footer__legal {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: var(--space-md);
  }
  .c-footer__legal span { font-size: 0.8125rem; color: rgba(255,255,255,0.35); }
  .c-footer__legal-links { display: flex; gap: var(--space-md); flex-wrap: wrap; }
  .c-footer__legal-links a {
    font-size: 0.8125rem;
    color: rgba(255,255,255,0.45);
    transition: color var(--transition-base);
  }
  .c-footer__legal-links a:hover { color: rgba(255,255,255,0.8); }
}

@layer utilities {
  .u-hidden { display: none !important; }
  .u-text-center { text-align: center; }
  .is-active { }
  .is-visible { opacity: 1 !important; transform: none !important; }

  
  @media (min-width: 640px) {
    .s-topics__grid { grid-template-columns: 1fr 1fr; }
    .s-attributes__grid { grid-template-columns: 1fr 1fr; }
    .s-articles__grid { grid-template-columns: 1fr 1fr; }
    .s-audience__cards { grid-template-columns: 1fr 1fr; }
    .c-yt-comparison__grid { grid-template-columns: 1fr 1fr; }
    .s-newsletter__inner { grid-template-columns: 1fr 1fr; }
  }

  @media (min-width: 768px) {
    .s-intro__grid { grid-template-columns: 55% 45%; }
    .s-zigzag__block { grid-template-columns: 1fr 1fr; }
    .s-zigzag__block--right .s-zigzag__img-wrap { order: 2; }
    .s-zigzag__block--right .s-zigzag__content { order: 1; }
    .s-zigzag__img { height: 400px; }
    .s-youtube-teaser__inner { grid-template-columns: 1fr 1fr; }
    .s-youtube-teaser__img { height: 360px; }
    .s-yt-intro { grid-template-columns: 1fr 1fr; }
    .s-contact__grid { grid-template-columns: 1fr 1fr; }
    .s-audience__grid { grid-template-columns: 55% 45%; }
  }

  @media (min-width: 960px) {
    .c-nav__links { display: flex; }
    .c-nav__hamburger { display: none; }
    .c-btn--nav { display: inline-flex; }
    .s-topics__grid { grid-template-columns: repeat(4, 1fr); }
    .s-articles__grid { grid-template-columns: repeat(3, 1fr); }
    .s-attributes__grid { grid-template-columns: repeat(4, 1fr); }
    .s-content__layout { grid-template-columns: 1fr 320px; }
    .s-lib-nav__tabs { flex-wrap: nowrap; }
    .c-footer__inner { grid-template-columns: 2fr 1.5fr 1.5fr; }
    .c-footer__legal { flex-direction: row; align-items: center; justify-content: space-between; }
  }

  @media (max-width: 959px) {
    .c-btn--nav { display: none; }
    .c-sidebar-cta { display: none; }
  }

  @media (max-width: 639px) {
    .s-hero__ctas { flex-direction: column; align-items: center; }
    .c-newsletter-form__row { flex-direction: column; }
  }
}