/* ═══════════════════════════════════════════════════
   1. CSS RESET
   ═══════════════════════════════════════════════════ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

ul, ol {
  list-style: none;
}

/* ═══════════════════════════════════════════════════
   2. DESIGN TOKENS
   ═══════════════════════════════════════════════════ */
:root {
  /* Backgrounds */
  --bg-primary:    #060C18;
  --bg-secondary:  #0B1220;
  --bg-card:       #101827;
  --bg-card-hover: #141F30;

  /* Accent Colors */
  --accent-1:      #E07B28;
  --accent-2:      #5B9BD5;
  --accent-3:      #34D399;

  /* Typography */
  --text-primary:  #F1F5FF;
  --text-secondary:#94A3B8;
  --text-muted:    #4B5B6E;

  /* Structure */
  --border:        #1A2540;
  --border-accent: #E07B2830;
  --radius-sm:     6px;
  --radius-md:     12px;
  --radius-lg:     20px;

  /* Typography Scale */
  --font-main:     'Inter', 'Neue Haas Grotesk', -apple-system, sans-serif;
  --font-mono:     'JetBrains Mono', 'Fira Code', monospace;
  --fs-hero:       clamp(3.2rem, 7vw, 6.5rem);
  --fs-h2:         clamp(2rem, 4vw, 3rem);
  --fs-h3:         clamp(1.3rem, 2.5vw, 1.75rem);
  --fs-body:       1.05rem;
  --lh-tight:      1.1;
  --lh-normal:     1.65;

  /* Spacing */
  --section-padding: clamp(50px, 6vw, 90px) clamp(24px, 6vw, 80px);
  --max-width:     1200px;
  --max-width-text:720px;
}

/* ═══════════════════════════════════════════════════
   3. BASE TYPOGRAPHY
   ═══════════════════════════════════════════════════ */
body {
  font-family: var(--font-main);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: var(--lh-normal);
  color: var(--text-secondary);
  background-color: var(--bg-primary);
}

h1, h2, h3 {
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: var(--lh-tight);
}

h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

.accent { color: var(--accent-1); }

/* ═══════════════════════════════════════════════════
   4. LAYOUT UTILITIES
   ═══════════════════════════════════════════════════ */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.container--narrow {
  max-width: var(--max-width-text);
}

.section {
  padding: var(--section-padding);
}

.section--alt {
  background-color: var(--bg-secondary);
}

.text-center {
  text-align: center;
  margin-top: 3rem;
}

.section__label {
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 1rem;
}

.section__heading {
  margin-bottom: 1rem;
}

.section__heading--large {
  font-size: var(--fs-hero);
}

.section__subtext {
  color: var(--text-muted);
  max-width: var(--max-width-text);
  margin-bottom: 2rem;
}

.section__subtext--italic {
  font-style: italic;
}

/* ═══════════════════════════════════════════════════
   5. ANIMATIONS
   ═══════════════════════════════════════════════════ */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* ═══════════════════════════════════════════════════
   6. NAV
   ═══════════════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 2rem;
  transition: background-color 0.3s ease, backdrop-filter 0.3s ease;
}

.nav.scrolled {
  background-color: rgba(6, 12, 24, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav__name {
  font-weight: 300;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav__link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s ease;
  position: relative;
}

.nav__link:hover,
.nav__link.active {
  color: var(--accent-1);
}

.nav__link--cta {
  background: var(--accent-1);
  color: var(--bg-primary) !important;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: opacity 0.2s ease;
}

.nav__link--cta:hover {
  opacity: 0.9;
}

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav__hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger.open span:nth-child(2) {
  opacity: 0;
}

.nav__hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu overlay */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(6, 12, 24, 0.97);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu__links {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.mobile-menu__links a {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease, transform 0.4s ease, color 0.2s ease;
}

.mobile-menu.open .mobile-menu__links a {
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu__links a:hover {
  color: var(--accent-1);
}

/* Staggered animation for mobile menu items */
.mobile-menu.open .mobile-menu__links li:nth-child(1) a { transition-delay: 0.05s; }
.mobile-menu.open .mobile-menu__links li:nth-child(2) a { transition-delay: 0.1s; }
.mobile-menu.open .mobile-menu__links li:nth-child(3) a { transition-delay: 0.15s; }
.mobile-menu.open .mobile-menu__links li:nth-child(4) a { transition-delay: 0.2s; }
.mobile-menu.open .mobile-menu__links li:nth-child(5) a { transition-delay: 0.25s; }
.mobile-menu.open .mobile-menu__links li:nth-child(6) a { transition-delay: 0.3s; }
.mobile-menu.open .mobile-menu__links li:nth-child(7) a { transition-delay: 0.35s; }

/* ═══════════════════════════════════════════════════
   7. HERO
   ═══════════════════════════════════════════════════ */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 clamp(24px, 6vw, 80px);
  position: relative;
}

.hero__content {
  max-width: 800px;
}

.hero__label {
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 1.5rem;
}

.hero__heading {
  font-size: var(--fs-hero);
  line-height: var(--lh-tight);
  margin-bottom: 1.5rem;
}

.hero__rule {
  width: 60px;
  height: 2px;
  background: var(--accent-1);
  margin-bottom: 1.5rem;
}

.hero__body {
  max-width: 580px;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  font-size: 1.1rem;
}

.hero__ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero__scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent-1);
  color: var(--bg-primary);
}

.btn--primary:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
}

.btn--outline {
  border: 1.5px solid var(--border);
  color: var(--text-primary);
}

.btn--outline:hover {
  border-color: var(--accent-1);
  color: var(--accent-1);
  transform: translateY(-2px);
}

.btn--discovery {
  background: var(--accent-3);
  color: var(--bg-primary);
  border: 1.5px solid var(--accent-3);
}

.btn--discovery:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
}

.btn--discovery.btn--outline {
  background: transparent;
  color: var(--accent-3);
  border-color: var(--accent-3);
}

.btn--discovery.btn--outline:hover {
  background: var(--accent-3);
  color: var(--bg-primary);
}

.btn--large {
  padding: 1.15rem 3rem;
  font-size: 1.1rem;
}

/* ═══════════════════════════════════════════════════
   8. ABOUT
   ═══════════════════════════════════════════════════ */
.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.about__text p {
  margin-bottom: 1.25rem;
}

.about__image {
  position: relative;
}

.about__image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--accent-1);
  box-shadow: 0 0 60px rgba(224, 123, 40, 0.12);
  aspect-ratio: 3/4;
  object-fit: cover;
}

/* Collaborator marquee */
.collab-marquee {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.collab-marquee__label {
  font-weight: 600;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-1);
  margin-bottom: 1rem;
  text-align: center;
}

.collab-marquee__slider {
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, black 4%, black 96%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 4%, black 96%, transparent);
}

.collab-marquee__track {
  display: flex;
  gap: 0.75rem;
  width: max-content;
  animation: collab-scroll 40s linear infinite;
}

.collab-marquee__slider:hover .collab-marquee__track {
  animation-play-state: paused;
}

@keyframes collab-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.collab-tile {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.75rem 0.4rem 0.4rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: border-color 0.3s ease, transform 0.3s ease;
  white-space: nowrap;
}

.collab-tile:hover {
  border-color: var(--accent-1);
  transform: translateY(-1px);
}

.collab-tile__mono {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  color: #fff;
  font-weight: 700;
  font-size: 0.65rem;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.collab-tile__name {
  font-size: 0.7rem;
  line-height: 1.25;
  color: var(--text-primary);
}

.collab-tile__name small {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.6rem;
}

/* Metrics */
.metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.metric-card:hover {
  border-color: var(--accent-1);
  box-shadow: 0 0 30px rgba(224, 123, 40, 0.08);
}

.metric-card__icon {
  margin: 0 auto 0.75rem;
}

.metric-card__number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent-1);
  letter-spacing: -0.03em;
}

.metric-card__plus {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-1);
}

.metric-card__label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ═══════════════════════════════════════════════════
   9. SERVICES
   ═══════════════════════════════════════════════════ */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 2rem;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  border-left-color: var(--accent-1);
  transform: translateY(-6px);
  background: var(--bg-card-hover);
}

.service-card__icon {
  font-size: 1.5rem;
  color: var(--accent-1);
  margin-bottom: 0.75rem;
}

.service-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.service-card__desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.service-card[role="button"] {
  cursor: pointer;
}

/* ═══════════════════════════════════════════════════
   10. PUBLICATIONS
   ═══════════════════════════════════════════════════ */
.metrics--research {
  margin-bottom: 3rem;
}

.publications-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.pub-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent-2);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.pub-card__year {
  display: inline-block;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--accent-2);
  margin-right: 0.75rem;
}

.pub-card__tag {
  display: inline-block;
  font-weight: 600;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--bg-primary);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  margin-right: 0.5rem;
}

.pub-card__type {
  display: inline-block;
  font-weight: 600;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-3);
  background: rgba(52, 211, 153, 0.1);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
}

.pub-card__text {
  margin-top: 0.75rem;
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Awards slider (infinite marquee) */
.awards-slider {
  margin-top: 3rem;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, black 5%, black 95%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 5%, black 95%, transparent);
}

.awards-slider__track {
  display: flex;
  gap: 1rem;
  width: max-content;
  animation: awards-scroll 25s linear infinite;
}

.awards-slider:hover .awards-slider__track {
  animation-play-state: paused;
}

@keyframes awards-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.award-card {
  flex: 0 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  font-size: 0.85rem;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.award-card__icon {
  font-size: 1.2rem;
}

.award-card strong {
  color: var(--text-primary);
}

.award-card__inst {
  color: var(--text-muted);
  margin-left: 0.25rem;
}

/* ═══════════════════════════════════════════════════
   11. TESTIMONIALS (slider)
   ═══════════════════════════════════════════════════ */
.testimonials-slider {
  position: relative;
  overflow: hidden;
}

.testimonials-slider__track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.testimonial-card {
  flex: 0 0 60%;
  margin: 0 1%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 2rem;
  position: relative;
  transition: opacity 0.5s ease, filter 0.5s ease, transform 0.5s ease;
  opacity: 0.35;
  filter: blur(2px);
  transform: scale(0.92);
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 280px;
}

.testimonial-card.active {
  opacity: 1;
  filter: blur(0);
  transform: scale(1);
}

.testimonials-slider__dots {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.testimonials-slider__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border);
  border: none;
  cursor: pointer;
  transition: background 0.3s ease;
  padding: 0;
}

.testimonials-slider__dot.active {
  background: var(--accent-1);
}

.testimonial-card__quote {
  position: absolute;
  top: 0.5rem;
  left: 1.25rem;
  font-size: 5rem;
  color: var(--accent-1);
  opacity: 0.15;
  font-family: Georgia, serif;
  line-height: 1;
  pointer-events: none;
}

.testimonial-card__text {
  position: relative;
  z-index: 1;
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.testimonial-card__author {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.testimonial-card__author strong {
  color: var(--text-primary);
  font-size: 0.95rem;
}

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

/* ═══════════════════════════════════════════════════
   12. MEDIA / YOUTUBE
   ═══════════════════════════════════════════════════ */
.media-playlist {
  margin-bottom: 3rem;
}

.media-playlist__title {
  font-size: var(--fs-h3);
  margin-bottom: 0.25rem;
}

.media-playlist__sub {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 1.25rem;
}

.media-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.video-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.video-card:hover {
  border-color: var(--accent-1);
  transform: translateY(-4px);
}

.video-card__thumb {
  aspect-ratio: 16/9;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.video-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-card__play {
  position: absolute;
  transition: transform 0.3s ease;
}

.video-card:hover .video-card__play {
  transform: scale(1.15);
}

.video-card__title {
  padding: 0.75rem 1rem 0.25rem;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.video-card__duration {
  display: block;
  padding: 0 1rem 0.75rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Playlist grid (4 square cards) */
.playlist-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.playlist-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 2.5rem 1.5rem;
  transition: all 0.3s ease;
}

.playlist-card:hover {
  border-color: var(--accent-1);
  transform: translateY(-6px);
  background: var(--bg-card-hover);
}

.playlist-card__icon {
  margin-bottom: 1rem;
  transition: transform 0.3s ease;
}

.playlist-card:hover .playlist-card__icon {
  transform: scale(1.15);
}

.playlist-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.playlist-card__desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ═══════════════════════════════════════════════════
   13. THOUGHTS / BLOG PREVIEW
   ═══════════════════════════════════════════════════ */
.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.blog-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  border-top: 3px solid transparent;
  transition: all 0.3s ease;
}

.blog-card:hover {
  border-top-color: var(--accent-1);
  transform: translateY(-4px);
}

.blog-card__date {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-right: 0.75rem;
}

.blog-card__category {
  font-weight: 600;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-2);
  background: rgba(91, 155, 213, 0.1);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
}

.blog-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0.75rem 0 0.5rem;
  line-height: 1.3;
}

.blog-card__excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.blog-card__link {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--accent-1);
}

/* ═══════════════════════════════════════════════════
   14. FAQ ACCORDION
   ═══════════════════════════════════════════════════ */
.faq-list {
  margin-top: 1rem;
}

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

.faq-item__question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 0;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  text-align: left;
  gap: 1rem;
  transition: color 0.2s ease;
}

.faq-item__question:hover {
  color: var(--accent-1);
}

.faq-item__icon {
  flex-shrink: 0;
  font-size: 1.5rem;
  transition: transform 0.3s ease;
  color: var(--accent-1);
}

.faq-item.open .faq-item__icon {
  transform: rotate(45deg);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq-item.open .faq-item__answer {
  max-height: 500px;
  padding-bottom: 1.25rem;
}

.faq-item__answer p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* FAQ collapse: show first 5, fade rest */
.faq-list--collapsed {
  position: relative;
  max-height: none;
  overflow: hidden;
}

.faq-list--collapsed .faq-item:nth-child(n+6) {
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  margin: 0;
  padding: 0;
  border: none;
  transition: opacity 0.4s ease, max-height 0.4s ease;
}

.faq-list--collapsed .faq-item:nth-child(5) {
  opacity: 0.4;
  filter: blur(1px);
}

.faq-list--collapsed .faq-item:nth-child(4) {
  opacity: 0.7;
}

/* Expanded state */
.faq-list--expanded .faq-item {
  opacity: 1 !important;
  max-height: 500px !important;
  filter: none !important;
  margin-bottom: 0;
  transition: opacity 0.4s ease, max-height 0.5s ease;
}

.faq-show-more {
  display: block;
  margin: 1.5rem auto 0;
  font-size: 0.85rem;
}

.faq-show-more--hidden {
  display: none;
}

.faq-note {
  margin-top: 2rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.faq-note a {
  color: var(--accent-1);
  font-weight: 600;
}

/* ═══════════════════════════════════════════════════
   15. CONTACT
   ═══════════════════════════════════════════════════ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2rem;
}

.contact-action {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

.contact-link--cta {
  border-left: 3px solid var(--accent-1);
}

.contact-link--cta:hover {
  border-left-color: var(--accent-1);
}

.contact-link--whatsapp {
  border-left-color: #25D366;
}

.contact-link--whatsapp:hover {
  border-color: #25D366;
  border-left-color: #25D366;
}

.contact-link--whatsapp svg {
  color: #25D366;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color 0.3s ease, color 0.2s ease;
}

.contact-link:hover {
  border-color: var(--accent-1);
  color: var(--accent-1);
}

.contact-link svg {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
}

.contact-link strong {
  display: block;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.contact-link span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.contact-link:hover strong {
  color: var(--accent-1);
}

/* Affiliations */
.affiliations {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 4rem;
  justify-content: center;
}

.affiliation-badge {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
}

/* ═══════════════════════════════════════════════════
   16. FOOTER
   ═══════════════════════════════════════════════════ */
.footer {
  padding: 3rem 2rem;
  text-align: center;
  border-top: 1px solid var(--border);
}

.footer__logo {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
}

.footer__name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
}

.footer__socials {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.footer__socials a {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  background: var(--bg-card);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.footer__socials a:hover {
  border-color: var(--accent-1);
  color: var(--accent-1);
}

.footer__copy {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.footer__meta {
  font-size: 0.7rem;
  color: var(--text-muted);
  opacity: 0.6;
}

/* ═══════════════════════════════════════════════════
   17. MEDIA QUERIES
   ═══════════════════════════════════════════════════ */

/* Tablet */
@media (min-width: 768px) {
  .nav__hamburger { display: none; }

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

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

  .testimonial-card {
    flex: 0 0 50%;
    margin: 0 1%;
  }

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

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

  .contact-grid {
    grid-template-columns: 1fr 1px 1fr;
    gap: 0 2rem;
    align-items: start;
  }

  .contact-grid::before {
    content: '';
    grid-column: 2;
    grid-row: 1;
    background: var(--border);
    width: 1px;
    height: 100%;
    align-self: stretch;
  }

  .contact-action {
    grid-column: 1;
    grid-row: 1;
  }

  .contact-links {
    grid-column: 3;
    grid-row: 1;
    grid-template-columns: 1fr 1fr;
  }

  .about__grid {
    grid-template-columns: 3fr 2fr;
    align-items: start;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Mobile only */
@media (max-width: 767px) {

  /* Nav */
  .nav__links {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .nav {
    padding: 0.75rem 1rem;
  }

  .nav__name {
    font-size: 0.8rem;
  }

  .nav__logo-svg {
    width: 32px;
    height: 32px;
  }

  /* Hero — tighter on mobile */
  .hero {
    min-height: 90svh;
    padding: 0 1.25rem;
    padding-top: 70px;
  }

  .hero__heading {
    font-size: clamp(2.5rem, 10vw, 3.5rem);
  }

  .hero__label {
    font-size: 0.65rem;
    margin-bottom: 1rem;
  }

  .hero__body {
    font-size: 0.95rem;
    margin-bottom: 2rem;
  }

  .hero__ctas {
    flex-direction: column;
    gap: 0.75rem;
  }

  .hero__ctas .btn {
    width: 100%;
    text-align: center;
    justify-content: center;
  }

  .hero__scroll-indicator {
    display: none;
  }

  /* Section spacing — tighter on mobile */
  .section {
    padding: clamp(40px, 8vw, 60px) 1.25rem;
  }

  .section__heading--large {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .section__subtext {
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
  }

  .text-center {
    margin-top: 2rem;
  }

  /* About — image smaller on mobile */
  .about__grid {
    gap: 2rem;
    margin-bottom: 2.5rem;
  }

  .about__image img {
    aspect-ratio: 4/3;
    max-height: 300px;
  }

  .about__text p {
    font-size: 0.92rem;
  }

  /* Metrics — 2x2 grid, compact */
  .metrics {
    gap: 0.75rem;
  }

  .metric-card {
    padding: 1rem;
  }

  .metric-card__number {
    font-size: 1.8rem;
  }

  .metric-card__plus {
    font-size: 1.4rem;
  }

  .metric-card__label {
    font-size: 0.72rem;
  }

  .metric-card__icon {
    display: none;
  }

  /* Services — single column, compact cards */
  .service-card {
    padding: 1.25rem;
  }

  .service-card__title {
    font-size: 1rem;
  }

  .service-card__desc {
    font-size: 0.85rem;
  }

  /* Publications — compact */
  .pub-card {
    padding: 1rem;
  }

  .pub-card__text {
    font-size: 0.85rem;
  }

  .pub-card__tag,
  .pub-card__type {
    font-size: 0.6rem;
    margin-top: 0.25rem;
  }

  /* Awards — slider, tighter on mobile */
  .awards-slider {
    margin-top: 2rem;
  }

  .award-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
    padding: 0.75rem 1rem;
    font-size: 0.78rem;
  }

  /* Testimonials — full width single card on mobile */
  .testimonial-card {
    flex: 0 0 85%;
    padding: 1.5rem;
  }

  .testimonial-card__quote {
    font-size: 3.5rem;
    top: 0.25rem;
    left: 0.75rem;
  }

  .testimonial-card__text {
    font-size: 0.88rem;
    margin-bottom: 1rem;
  }

  /* Playlists — 2x2 grid stays, but smaller */
  .playlist-card {
    padding: 1.5rem 1rem;
  }

  .playlist-card__title {
    font-size: 0.9rem;
  }

  .playlist-card__desc {
    font-size: 0.72rem;
  }

  .playlist-card__icon svg {
    width: 36px;
    height: 36px;
  }

  /* Blog cards */
  .blog-card {
    padding: 1.25rem;
  }

  .blog-card__title {
    font-size: 1rem;
    margin: 0.5rem 0 0.4rem;
  }

  .blog-card__excerpt {
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
  }

  /* FAQ — tighter */
  .faq-item__question {
    padding: 1rem 0;
    font-size: 0.9rem;
    gap: 0.5rem;
  }

  .faq-item__icon {
    font-size: 1.25rem;
  }

  .faq-item__answer p {
    font-size: 0.85rem;
  }

  /* Contact — single column on mobile */
  .contact-grid {
    gap: 2rem;
  }

  .contact-links {
    grid-template-columns: 1fr;
  }

  .contact-link {
    padding: 0.6rem 0.75rem;
  }

  .contact-link strong {
    font-size: 0.82rem;
  }

  .contact-link svg {
    width: 20px;
    height: 20px;
  }

  /* Affiliations — wrap tightly */
  .affiliations {
    margin-top: 2.5rem;
    gap: 0.5rem;
  }

  .affiliation-badge {
    font-size: 0.65rem;
    padding: 0.35rem 0.75rem;
  }

  /* Footer */
  .footer {
    padding: 2rem 1.25rem;
  }

  .footer__socials {
    gap: 0.6rem;
  }

  .footer__socials a {
    width: 32px;
    height: 32px;
    font-size: 0.65rem;
  }

  /* Buttons — touch-friendly sizing */
  .btn {
    padding: 0.8rem 1.5rem;
    font-size: 0.9rem;
  }

  /* Disable hover lift on touch devices */
  .service-card:hover,
  .blog-card:hover,
  .video-card:hover,
  .playlist-card:hover {
    transform: none;
  }

  /* Mobile menu links */
  .mobile-menu__links a {
    font-size: 1.5rem;
  }

  .mobile-menu__links {
    gap: 1.5rem;
  }

  /* Blog pages */
  .blog-hero {
    padding-top: 80px;
    padding-bottom: 20px;
  }

  .post-content {
    padding-top: 80px;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }
}

/* Small phones (iPhone SE, etc.) */
@media (max-width: 374px) {
  .hero__heading {
    font-size: 2.2rem;
  }

  .metric-card__number {
    font-size: 1.5rem;
  }

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

  .section {
    padding: 36px 1rem;
  }
}

/* ═══════════════════════════════════════════════════
   BLOG PAGE STYLES (shared)
   ═══════════════════════════════════════════════════ */
.blog-hero {
  padding-top: 120px;
  padding-bottom: 40px;
}

.blog-listing {
  padding-top: 0;
}

.post-content {
  max-width: var(--max-width-text);
  margin: 0 auto;
  padding-top: 120px;
}

.post-content h1 {
  font-size: var(--fs-h2);
  margin-bottom: 1rem;
}

.post-content .post-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.post-content p {
  margin-bottom: 1.25rem;
}

.post-content h2 {
  font-size: var(--fs-h3);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.post-content a {
  color: var(--accent-2);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.post-content a:hover {
  color: var(--accent-1);
}

.back-link {
  display: inline-block;
  margin-bottom: 2rem;
  color: var(--accent-1);
  font-weight: 600;
  font-size: 0.9rem;
}