/*
 * Арт проекты Ольги Звягинцевой
 * Стиль: тёмный люкс, вдохновлён safiriadiary.com
 * v3.0
 */

/* ══════════════════════════════════════
   RESET & BASE
   ══════════════════════════════════════ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 300;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg);
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: 'Forum', Georgia, serif;
  font-weight: 400;
  line-height: 1.15;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.5s ease;
}

ul { list-style: none; }

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ══════════════════════════════════════
   NAVBAR
   ══════════════════════════════════════ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 24px 0;
  background: transparent;
  transition: all 0.5s ease;
}

.navbar.scrolled {
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  padding: 16px 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-family: 'Forum', serif;
  font-size: 1.1rem;
  color: var(--text);
  letter-spacing: 0.02em;
}

.nav-brand:hover {
  color: var(--gold);
}

.nav-menu {
  display: flex;
  gap: 40px;
}

.nav-menu a {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--text-soft);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 0;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width 0.5s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--gold);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

/* Burger */
.burger-menu {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.burger-menu span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--text);
  transition: all 0.4s ease;
}

.burger-menu.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.burger-menu.active span:nth-child(2) {
  opacity: 0;
}

.burger-menu.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ══════════════════════════════════════
   BUTTONS
   ══════════════════════════════════════ */

.btn-gold {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 44px;
  background: var(--gradient-gold);
  color: var(--text-dark);
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.5s ease;
}

.btn-gold:hover {
  box-shadow: var(--glow-gold), 0 8px 32px rgba(216, 201, 153, 0.2);
  transform: translateY(-2px);
  color: var(--text-dark);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 44px;
  background: transparent;
  color: var(--text-soft);
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--line-hover);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.5s ease;
}

.btn-outline:hover {
  color: var(--gold);
  border-color: var(--gold-dim);
}

/* ══════════════════════════════════════
   HERO
   ══════════════════════════════════════ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 160px 0 120px;
  overflow: hidden;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 60%,
    rgba(216, 201, 153, 0.04) 0%,
    transparent 50%);
  pointer-events: none;
}

.hero__content {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}

.hero__label {
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 32px;
}

.hero__title {
  font-size: clamp(2.8rem, 6vw, 4.2rem);
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 32px;
}

.hero__divider {
  width: 48px;
  height: 1px;
  background: var(--gold);
  margin: 0 auto 32px;
}

.hero__text {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-soft);
  margin-bottom: 48px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.hero__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* ══════════════════════════════════════
   SECTION HEAD
   ══════════════════════════════════════ */

.section-head {
  text-align: center;
  margin-bottom: 72px;
}

.section-head__label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 20px;
}

.section-head__title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  color: var(--text);
  letter-spacing: -0.01em;
}

/* ══════════════════════════════════════
   DIRECTIONS
   ══════════════════════════════════════ */

.directions {
  padding: 140px 0;
}

.directions__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.dir-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 44px 40px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.5s ease;
  min-height: 240px;
}

.dir-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-card);
  opacity: 0;
  transition: opacity 0.5s ease;
}

.dir-card:hover {
  border-color: rgba(216, 201, 153, 0.15);
  box-shadow: var(--glow-gold);
  transform: translateY(-4px);
}

.dir-card:hover::before {
  opacity: 1;
}

.dir-card__num {
  position: relative;
  font-family: 'Forum', serif;
  font-size: 0.85rem;
  color: var(--gold-dim);
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

.dir-card__title {
  position: relative;
  font-size: 1.5rem;
  color: var(--text);
  margin-bottom: 14px;
  transition: color 0.5s ease;
}

.dir-card:hover .dir-card__title {
  color: var(--gold-bright);
}

.dir-card__text {
  position: relative;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  flex: 1;
}

.dir-card__arrow {
  position: relative;
  display: inline-block;
  margin-top: 24px;
  font-size: 1.2rem;
  color: var(--gold-dim);
  opacity: 0;
  transform: translateX(-8px);
  transition: all 0.5s ease;
}

.dir-card:hover .dir-card__arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ══════════════════════════════════════
   QUOTE / MANIFESTO
   ══════════════════════════════════════ */

.quote-section {
  padding: 120px 0;
  background: var(--bg-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.quote-block {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.quote-block blockquote p {
  font-family: 'Forum', serif;
  font-size: clamp(1.15rem, 2.2vw, 1.4rem);
  line-height: 1.9;
  color: var(--text-soft);
  font-style: normal;
}

.quote-block blockquote strong {
  color: var(--gold);
  font-weight: 400;
}

.quote-block cite {
  display: block;
  margin-top: 32px;
  font-size: 0.8rem;
  font-style: normal;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* ═══════════════════════════════��══════
   OUTCOMES
   ══════════════════════════════════════ */

.outcomes {
  padding: 140px 0;
}

.outcomes__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.outcome {
  padding: 36px 32px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all 0.5s ease;
}

.outcome:hover {
  border-color: rgba(216, 201, 153, 0.12);
}

.outcome__num {
  display: block;
  font-family: 'Forum', serif;
  font-size: 0.85rem;
  color: var(--gold-dim);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.outcome p {
  font-size: 0.95rem;
  color: var(--text-soft);
  line-height: 1.6;
}

/* ══════════════════════════════════════
   CTA
   ══════════════════════════════════════ */

.cta-section {
  padding: 140px 0;
  background: var(--bg-2);
  border-top: 1px solid var(--line);
}

.cta-block {
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
}

.cta-block h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: var(--text);
  margin-bottom: 20px;
}

.cta-block p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  line-height: 1.7;
}

/* ══════════════════════════════════════
   FOOTER
   ══════════════════════════════════════ */

.footer {
  padding: 80px 0 40px;
  background: var(--bg);
  border-top: 1px solid var(--line);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer__name {
  font-family: 'Forum', serif;
  font-size: 1.1rem;
  color: var(--text);
  margin-bottom: 8px;
}

.footer__desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer__nav ul li {
  margin-bottom: 10px;
}

.footer__nav a {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer__nav a:hover {
  color: var(--gold);
}

.social-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.social-link:hover {
  color: var(--gold);
}

.footer__bottom {
  padding-top: 40px;
  border-top: 1px solid var(--line);
}

.footer__bottom p {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

/* ══════════════════════════════════════
   ANIMATIONS
   ══════════════════════════════════════ */

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ══════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════ */

@media (max-width: 1024px) {
  .container { padding: 0 32px; }

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

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

/* Скрыть языковые кнопки в меню на десктопе */
.nav-lang-switch {
  display: none;
}

@media (max-width: 768px) {
  .container { padding: 0 24px; }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: rgba(10, 10, 10, 0.97);
    backdrop-filter: var(--blur-md);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 32px;
    transition: right 0.5s ease;
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-menu a {
    font-size: 0.9rem;
  }

  .burger-menu {
    display: flex;
  }

  /* Кнопки языков внутри мобильного меню */
  .nav-lang-switch {
    display: flex;
    gap: 10px;
    justify-content: center;
    padding-top: 16px;
    border-top: 1px solid rgba(216, 201, 153, 0.12);
    list-style: none;
  }

  .nav-lang-switch .lang-switch__btn {
    padding: 8px 20px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    background: rgba(216, 201, 153, 0.06);
    border: 1px solid var(--line);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
  }

  .nav-lang-switch .lang-switch__btn:hover,
  .nav-lang-switch .lang-switch__btn.active {
    color: var(--gold);
    border-color: rgba(212, 168, 83, 0.4);
    background: rgba(212, 168, 83, 0.1);
  }

  .hero {
    padding: 140px 0 100px;
    min-height: auto;
  }

  .hero__actions {
    flex-direction: column;
    align-items: center;
  }

  .directions,
  .outcomes {
    padding: 100px 0;
  }

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

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 480px) {
  .hero__title {
    font-size: 2.2rem;
  }

  .dir-card {
    padding: 32px 28px;
    min-height: auto;
  }

  .btn-gold,
  .btn-outline {
    padding: 14px 32px;
    width: 100%;
    justify-content: center;
  }
}

/* ═════════════════════���════════════════
   SUBPAGE SUPPORT (legacy styles)
   ══════════════════════════════════════ */

.program { padding: 100px 0; }

.section-title {
  font-family: 'Forum', serif;
  font-size: 2.2rem;
  text-align: center;
  margin-bottom: 48px;
}

/* Accordion */
.accordion-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.5s;
}

.accordion-item:hover {
  border-color: var(--line-hover);
}

.accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 28px;
  background: var(--bg-2);
  border: none;
  color: var(--text);
  cursor: pointer;
  text-align: left;
  font-family: inherit;
}

.accordion-title h3 {
  font-family: 'Forum', serif;
  font-size: 1.3rem;
  margin-bottom: 4px;
}

.accordion-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.accordion-arrow {
  width: 10px;
  height: 10px;
  border-right: 1px solid var(--text-muted);
  border-bottom: 1px solid var(--text-muted);
  transform: rotate(45deg);
  transition: transform 0.4s;
  flex-shrink: 0;
}

.accordion-item.active .accordion-arrow {
  transform: rotate(-135deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease;
}

.accordion-item.active .accordion-content {
  max-height: 600px;
}

.accordion-body {
  padding: 20px 28px 28px;
}

.accordion-body p {
  font-size: 0.9rem;
  color: var(--text-soft);
  line-height: 1.7;
  margin-bottom: 16px;
}

.accordion-modules,
.accordion-subprogram { margin-bottom: 16px; }

.module-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.module-item:last-child { border-bottom: none; }

.module-item h4 {
  font-family: 'Forum', serif;
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.module-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.accordion-actions {
  display: flex;
  gap: 12px;
  padding-top: 8px;
}

.cta-button {
  display: inline-flex;
  padding: 14px 32px;
  background: var(--gradient-gold);
  color: var(--text-dark);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: var(--radius);
  transition: all 0.5s;
}

.cta-button:hover {
  box-shadow: var(--glow-gold);
  transform: translateY(-1px);
  color: var(--text-dark);
}

.cta-button-secondary {
  display: inline-flex;
  padding: 14px 32px;
  border: 1px solid var(--line-hover);
  color: var(--text-soft);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: var(--radius);
  transition: all 0.5s;
}

.cta-button-secondary:hover {
  color: var(--gold);
  border-color: var(--gold-dim);
}

.highlight-note {
  color: var(--gold);
  font-style: italic;
}

/* Hero subpage */
.hero-content { max-width: 700px; margin: 0 auto; text-align: center; }
.hero-content h1 {
  font-family: 'Forum', serif;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  margin-bottom: 16px;
}
.hero-content h2 {
  font-family: 'Forum', serif;
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--gold);
  margin-bottom: 20px;
}
.hero-subtitle {
  color: var(--text-soft);
  font-size: 0.95rem;
  margin-bottom: 24px;
}
.hero-instructor { margin-bottom: 32px; }
.instructor-name {
  font-family: 'Forum', serif;
  font-size: 1.1rem;
  color: var(--text);
}
.instructor-title {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.hero-features {
  display: flex;
  gap: 32px;
  justify-content: center;
  margin-top: 40px;
}
.feature {
  display: flex;
  align-items: center;
  gap: 8px;
}
.feature-text {
  font-size: 0.8rem;
  color: var(--text-soft);
}

/* Sections */
section { padding: 80px 0; }

.about-section, .philosophy-section, .approach-section,
.results-section, .testimonials-section, .contact-section,
.faq-section { padding: 100px 0; }

.about-section:nth-child(even), .philosophy-section,
.results-section, .faq-section {
  background: var(--bg-2);
}

/* Grids */
.about-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 48px; align-items: start; }
.approach-grid, .results-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.testimonials-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }

/* Cards */
.approach-card, .result-card, .testimonial-card {
  padding: 36px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.5s;
}

.approach-card:hover, .result-card:hover, .testimonial-card:hover {
  border-color: rgba(216, 201, 153, 0.12);
}

.approach-card h3, .result-card h3 {
  font-family: 'Forum', serif;
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.approach-card p, .result-card p {
  font-size: 0.9rem;
  color: var(--text-soft);
  line-height: 1.7;
}

.testimonial-card blockquote {
  font-style: italic;
  color: var(--text-soft);
  margin-bottom: 16px;
  font-size: 0.9rem;
  line-height: 1.7;
}

.testimonial-card cite {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: normal;
}

/* FAQ */
.faq-item {
  border-bottom: 1px solid var(--line);
  padding: 24px 0;
}
.faq-item h4 { font-family: 'Forum', serif; font-size: 1rem; margin-bottom: 8px; }
.faq-item p { font-size: 0.9rem; color: var(--text-soft); }

/* Images */
.about-image img { border-radius: var(--radius); width: 100%; }

/* Social cards */
.social-cards { display: flex; gap: 16px; flex-wrap: wrap; }
.social-card {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 24px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.5s;
}
.social-card:hover { border-color: rgba(216, 201, 153, 0.15); }

/* Gallery */
.gallery-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.gallery-grid img {
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.5s;
}
.gallery-grid img:hover { transform: scale(1.02); opacity: 0.9; }

/* Tabs */
.tabs { margin-bottom: 32px; }
.tab-buttons { display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap; }
.tab-btn, .tab-button {
  padding: 12px 24px;
  background: transparent;
  border: 1px solid var(--line-hover);
  color: var(--text-soft);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.5s;
  font-family: inherit;
}
.tab-btn.active, .tab-btn:hover,
.tab-button.active, .tab-button:hover {
  background: var(--gradient-gold);
  border-color: transparent;
  color: var(--text-dark);
}
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Course/module cards */
.course-card {
  padding: 36px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 16px;
}
.course-card h3 { font-family: 'Forum', serif; font-size: 1.3rem; margin-bottom: 12px; }
.course-card p { font-size: 0.9rem; color: var(--text-soft); line-height: 1.7; }

.module-card {
  padding: 28px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 12px;
  cursor: pointer;
  transition: border-color 0.5s;
}
.module-card:hover, .module-card.active { border-color: rgba(216, 201, 153, 0.15); }
.module-card h4 { font-family: 'Forum', serif; font-size: 1.1rem; margin-bottom: 8px; }
.module-card p { font-size: 0.85rem; color: var(--text-muted); }

/* Placeholder */
.image-placeholder-box {
  background: var(--bg-2);
  border: 1px dashed var(--line-hover);
  border-radius: var(--radius);
  padding: 60px 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Performance layout */
.performance-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 80px;
}
.performance-section iframe {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

/* Philosophy */
.philosophy-ideas { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 24px; }
.philosophy-idea { padding: 28px; border-left: 2px solid var(--gold-dim); }
.philosophy-idea h4 { font-family: 'Forum', serif; font-size: 1rem; margin-bottom: 8px; }
.philosophy-idea p { font-size: 0.85rem; color: var(--text-soft); }

/* Dark side */
.dark-side-course {
  padding: 44px;
  background: var(--bg-2);
  border: 1px solid rgba(216, 201, 153, 0.1);
  border-radius: var(--radius);
  margin-top: 32px;
}
.dark-side-course h3 { font-family: 'Forum', serif; color: var(--gold); margin-bottom: 16px; }

/* Responsive subpages */
@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; }
  .performance-section { grid-template-columns: 1fr; }
  .hero-features { flex-direction: column; gap: 16px; }
}