/* =========================================
   SCL DIGITAL AGENCY — Case Studies
   Design tokens: Syne display / Inter body
   Accent: Electric violet-blue #5B4FE9
   Signature: Morphing hero dot-grid map
   ========================================= */

/* ---- TOKENS ---- */
:root {
  --c-bg:        #F7F7FA;
  --c-surface:   #FFFFFF;
  --c-border:    #E4E4EF;
  --c-text:      #11111A;
  --c-muted:     #6B6B80;
  --c-accent:    #5B4FE9;
  --c-accent-lt: #EAE8FD;
  --c-accent-gd: linear-gradient(135deg, #5B4FE9 0%, #00C9FF 100%);
  --c-card-bg:   #FFFFFF;

  --r-card:  16px;
  --r-pill:  999px;
  --r-btn:   10px;

  --shadow-sm:  0 2px 8px rgba(17,17,26,0.06);
  --shadow-md:  0 8px 32px rgba(17,17,26,0.1);
  --shadow-lg:  0 20px 60px rgba(91,79,233,0.18);

  --nav-h: 68px;
  --transition: 0.28s cubic-bezier(0.4,0,0.2,1);
}

[data-theme="dark"] {
  --c-bg:        #0D0D14;
  --c-surface:   #16161F;
  --c-border:    #25252F;
  --c-text:      #F0F0F8;
  --c-muted:     #8888A0;
  --c-accent-lt: #1E1A40;
  --c-card-bg:   #16161F;
  --shadow-sm:  0 2px 8px rgba(0,0,0,0.3);
  --shadow-md:  0 8px 32px rgba(0,0,0,0.4);
}

/* ---- RESET ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ---- UTILITY ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ---- FADE ANIMATIONS ---- */
.fade-in {
  opacity: 0;
  transform: translateY(22px);
  animation: fadeUp 0.7s var(--delay, 0s) cubic-bezier(0.22,1,0.36,1) forwards;
}
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}
.fade-in-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.65s cubic-bezier(0.22,1,0.36,1), transform 0.65s cubic-bezier(0.22,1,0.36,1);
}
.fade-in-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- NAV ---- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  background: transparent;
  transition: background var(--transition), backdrop-filter var(--transition), box-shadow var(--transition);
}
.nav.scrolled {
  background: rgba(247,247,250,0.85);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--c-border);
}
[data-theme="dark"] .nav.scrolled {
  background: rgba(13,13,20,0.85);
}
.nav__logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}
.nav__logo span { color: var(--c-accent); }
.nav__links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav__links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--c-muted);
  transition: color var(--transition);
}
.nav__links a:hover { color: var(--c-text); }
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.nav__hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: var(--r-btn);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn--primary {
  background: var(--c-accent);
  color: #fff;
  box-shadow: 0 4px 18px rgba(91,79,233,0.35);
}
.btn--primary:hover {
  background: #4a3fd4;
  box-shadow: 0 6px 24px rgba(91,79,233,0.5);
  transform: translateY(-1px);
}
.btn--outline {
  border: 1.5px solid var(--c-border);
  color: var(--c-text);
}
.btn--outline:hover { border-color: var(--c-accent); color: var(--c-accent); }
.btn--ghost {
  color: var(--c-muted);
  border-bottom: 1.5px solid transparent;
  padding: 11px 4px;
  border-radius: 0;
}
.btn--ghost:hover { color: var(--c-text); border-color: var(--c-text); }
.btn--clear {
  background: transparent;
  color: var(--c-muted);
  font-size: 0.85rem;
  font-weight: 500;
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-pill);
  padding: 8px 16px;
  transition: all var(--transition);
}
.btn--clear:hover { color: var(--c-text); border-color: var(--c-text); }
.btn--lg { padding: 15px 32px; font-size: 1rem; }

/* ---- THEME TOGGLE ---- */
.theme-toggle {
  width: 38px; height: 38px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  border: 1.5px solid var(--c-border);
  font-size: 1.1rem;
  color: var(--c-muted);
  transition: all var(--transition);
  margin-left: 12px;
}
.theme-toggle:hover { color: var(--c-text); border-color: var(--c-text); }

/* ---- HERO ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: calc(var(--nav-h) + 60px) 28px 100px;
}
.hero__map {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  opacity: 0.55;
  pointer-events: none;
}
[data-theme="dark"] .hero__map { opacity: 0.35; }
.hero__content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}
.hero__eyebrow {
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 20px;
}
.hero__headline {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2.6rem, 6vw, 5rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--c-text);
  margin-bottom: 24px;
}
.hero__sub {
  font-size: 1.1rem;
  color: var(--c-muted);
  max-width: 540px;
  margin: 0 auto 40px;
  line-height: 1.7;
}
.hero__cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.hero__scroll-hint {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 2;
}
.hero__scroll-hint span {
  width: 1.5px;
  height: 48px;
  background: linear-gradient(to bottom, var(--c-accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
.hero__scroll-hint p {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-muted);
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* ---- STATS ---- */
.stats {
  padding: 64px 0;
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  background: var(--c-surface);
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat-item {
  text-align: center;
  padding: 28px 20px;
  border-right: 1px solid var(--c-border);
  transition-delay: calc(var(--i, 0) * 0.1s);
}
.stat-item:last-child { border-right: none; }
.stat-item__num {
  display: block;
  font-family: 'Syne', sans-serif;
  font-size: clamp(2.4rem, 4vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  background: var(--c-accent-gd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
}
.stat-item__label {
  font-size: 0.85rem;
  color: var(--c-muted);
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* ---- RIBBON ---- */
.ribbon-section {
  padding: 52px 0 48px;
  overflow: hidden;
}
.ribbon-section__label {
  text-align: center;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin-bottom: 28px;
}
.ribbon {
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent 0%, black 12%, black 88%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 12%, black 88%, transparent 100%);
}
.ribbon__track {
  display: flex;
  gap: 0;
  width: max-content;
  animation: ribbonScroll 28s linear infinite;
}
.ribbon__track:hover { animation-play-state: paused; }
.ribbon__item {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  color: var(--c-border);
  padding: 12px 40px;
  border-right: 1px solid var(--c-border);
  white-space: nowrap;
  transition: color var(--transition);
  cursor: default;
  text-transform: uppercase;
}
.ribbon__item:hover { color: var(--c-accent); }
@keyframes ribbonScroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ---- FILTERS ---- */
.filters-section {
  position: sticky;
  top: var(--nav-h);
  z-index: 100;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-border);
  padding: 16px 0;
  transition: box-shadow var(--transition);
}
.filters-section.stuck {
  box-shadow: var(--shadow-sm);
}
.filters-wrapper {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  flex-wrap: wrap;
}
.filters-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.filters-label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-muted);
  white-space: nowrap;
}
.filters-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.pill {
  padding: 7px 16px;
  border-radius: var(--r-pill);
  border: 1.5px solid var(--c-border);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--c-muted);
  background: var(--c-surface);
  transition: all var(--transition);
  cursor: pointer;
}
.pill:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
  background: var(--c-accent-lt);
}
.pill.active {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #fff;
  box-shadow: 0 2px 12px rgba(91,79,233,0.3);
}

/* ---- CASE STUDIES ---- */
.case-studies {
  padding: 60px 0 100px;
}
.case-studies__meta {
  margin-bottom: 32px;
  font-size: 0.85rem;
  color: var(--c-muted);
  font-weight: 500;
}
.case-studies__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

/* ---- CARD ---- */
.card {
  background: var(--c-card-bg);
 border-top-left-radius: 25px;
    border-bottom-right-radius: 25px;
 border: 2px solid #4D4D4D;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
  opacity: 0;
  transform: translateY(24px);
}
.card.visible {
  opacity: 1;
  transform: translateY(0);
}
.card:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: var(--shadow-lg);
}
.card--featured {
  grid-column: span 2;
}
.card__image {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.card--featured .card__image { aspect-ratio: 21/9; }
.card__img-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 2rem;
  letter-spacing: -0.04em;
  color: rgba(255,255,255,0.9);
  transition: transform 0.5s cubic-bezier(0.22,1,0.36,1);
}
.card:hover .card__img-placeholder { transform: scale(1.04); }
.card__badge {
  position: absolute;
  top: 14px; left: 14px;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: var(--r-pill);
}
.card__body {
  padding: 28px 28px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card__client-logo {
  width: 72px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: #fff;
  margin-bottom: 16px;
}
.card__tags {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.card__tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-accent);
  background: var(--c-accent-lt);
  padding: 4px 10px;
  border-radius: var(--r-pill);
}
.card__title {
  font-family: 'Syne', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--c-text);
  margin-bottom: 10px;
}
.card--featured .card__title { font-size: 1.45rem; }
.card__desc {
  font-size: 0.9rem;
  color: var(--c-muted);
  line-height: 1.65;
  margin-bottom: 24px;
  flex: 1;
}
.card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--c-border);
  padding-top: 18px;
  margin-top: auto;
}
.card__cta {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-accent);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--transition);
}
.card__cta:hover { gap: 10px; }
.card__cta-arrow {
  font-size: 1rem;
  transition: transform var(--transition);
}
.card:hover .card__cta-arrow { transform: translateX(3px); }
.card__result {
  font-size: 0.78rem;
  color: var(--c-muted);
  font-weight: 500;
}
.card__result strong {
  color: var(--c-text);
  font-weight: 700;
}

/* NO RESULTS */
.no-results {
  text-align: center;
  padding: 80px 20px;
  color: var(--c-muted);
}
.no-results p { margin-bottom: 24px; font-size: 1.05rem; }

/* ---- CTA BANNER ---- */
.cta-banner {
  padding: 100px 0;
  background: var(--c-accent);
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #5B4FE9 0%, #00C9FF 100%);
  opacity: 0.9;
}
.cta-banner__inner {
  position: relative;
  text-align: center;
}
.cta-banner__headline {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #fff;
  margin-bottom: 16px;
}
.cta-banner__sub {
  color: rgba(255,255,255,0.75);
  font-size: 1.05rem;
  margin-bottom: 40px;
}
.cta-banner .btn--primary {
  background: #fff;
  color: var(--c-accent);
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}
.cta-banner .btn--primary:hover {
  background: #f0f0f8;
  transform: translateY(-2px);
}

/* ---- FOOTER ---- */
.footer {
  background: var(--c-surface);
  border-top: 1px solid var(--c-border);
  padding-top: 64px;
}
.footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 60px;
  padding-bottom: 60px;
}
.footer__logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  display: block;
  margin-bottom: 16px;
}
.footer__logo span { color: var(--c-accent); }
.footer__brand p {
  color: var(--c-muted);
  font-size: 0.9rem;
  max-width: 280px;
  line-height: 1.65;
}
.footer__links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.footer__links h4 {
  font-family: 'Syne', sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-text);
  margin-bottom: 16px;
}
.footer__links a {
  display: block;
  font-size: 0.88rem;
  color: var(--c-muted);
  margin-bottom: 10px;
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--c-accent); }
.footer__bottom {
  border-top: 1px solid var(--c-border);
  padding: 24px 28px;
  font-size: 0.82rem;
  color: var(--c-muted);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
  .case-studies__grid { grid-template-columns: repeat(2, 1fr); }
  .card--featured { grid-column: span 2; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(3) { border-top: 1px solid var(--c-border); }
  .stat-item:nth-child(4) { border-top: 1px solid var(--c-border); border-right: none; }
}

@media (max-width: 768px) {
  .nav { padding: 0 20px; }
  .nav__links { display: none; }
  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: var(--nav-h) 0 0 0;
    background: var(--c-bg);
    padding: 40px 28px;
    gap: 24px;
    font-size: 1.2rem;
    z-index: 999;
  }
  .nav__hamburger { display: flex; }

  .hero { padding: calc(var(--nav-h) + 40px) 20px 80px; }

  .case-studies__grid { grid-template-columns: 1fr; }
  .card--featured { grid-column: span 1; }
  .card--featured .card__image { aspect-ratio: 16/9; }

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

  .filters-wrapper { gap: 16px; }
  .filters-group { flex-direction: column; align-items: flex-start; }

  .footer__inner { grid-template-columns: 1fr; gap: 40px; }
  .footer__links { grid-template-columns: repeat(2, 1fr); }

  .cta-banner { padding: 70px 0; }
}

@media (max-width: 480px) {
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__links { grid-template-columns: 1fr 1fr; }
}

/* ---- REDUCED MOTION ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .ribbon__track { animation: none; }
}