/* ============================================================
   Section-specific layout
=============================================================== */

/* ---- Hero ---- */

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}

.hero-bg-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  animation: heroCrossfade 16s ease-in-out infinite;
}

.hero-bg-slide--a { animation-delay: 0s; }
.hero-bg-slide--b { animation-delay: -8s; }

@keyframes heroCrossfade {
  0%, 45% { opacity: 1; }
  50%, 95% { opacity: 0; }
  100% { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-bg-slide { animation: none; opacity: 0; }
  .hero-bg-slide--a { opacity: 1; }
}

.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(10,15,18,0.96) 0%, rgba(10,15,18,0.86) 32%, rgba(17,27,32,0.55) 62%, rgba(17,27,32,0.35) 100%),
    linear-gradient(to top, rgba(10,15,18,0.9), transparent 40%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  padding-top: 96px;
}

.hero-title {
  font-size: var(--fs-display);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--text-strong);
  margin-bottom: var(--space-md);
}

.hero-sub {
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

.hero-desc {
  font-size: var(--fs-body-lg);
  color: var(--text-muted);
  max-width: 46ch;
  line-height: 1.6;
  margin-bottom: var(--space-lg);
}

.hero-cta {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.hero-tags {
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  color: var(--text-meta);
  font-weight: 700;
}

.hero-tags .tag-divider {
  margin: 0 var(--space-xs);
  color: var(--navy-300);
}

/* ---- Proof strip ---- */

.proof-strip {
  padding-block: var(--space-xl);
  border-block: 1px solid var(--border-hairline);
  background: var(--bg-sunken);
  overflow: hidden;
}

.proof-art {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.proof-bars {
  position: absolute;
  inset: auto 0 0 0;
  height: 62%;
  display: flex;
  align-items: flex-end;
  justify-content: space-evenly;
  gap: 2vw;
  padding: 0 var(--edge-pad);
  mask-image: linear-gradient(to top, black, black 60%, transparent 100%);
  -webkit-mask-image: linear-gradient(to top, black, black 60%, transparent 100%);
}

.proof-bars span {
  flex: 1 1 0;
  max-width: 48px;
  height: var(--h);
  background: linear-gradient(to top, rgba(45,182,218,0.32), rgba(45,182,218,0.04));
  border-radius: 3px 3px 0 0;
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 900ms var(--ease-out);
}

.proof-line {
  position: absolute;
  inset: 8% var(--edge-pad) auto;
  width: calc(100% - 2 * var(--edge-pad));
  height: 55%;
}

.proof-line polyline {
  fill: none;
  stroke: var(--cyan-400);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.4;
  filter: drop-shadow(0 0 6px rgba(45,182,218,0.4));
  stroke-dasharray: 1400;
  stroke-dashoffset: 1400;
  transition: stroke-dashoffset 1400ms var(--ease-out);
}

.proof-strip.is-visible .proof-bars span {
  transform: scaleY(1);
  transition-delay: calc(var(--i, 0) * 60ms);
}

.proof-strip.is-visible .proof-line polyline {
  stroke-dashoffset: 0;
}

@media (prefers-reduced-motion: reduce) {
  .proof-bars span,
  .proof-line polyline {
    transition: none;
    transform: scaleY(1);
    stroke-dashoffset: 0;
  }
}

@media (max-width: 640px) {
  .proof-bars span:nth-child(even) { display: none; }
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-md);
}

.proof-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xs);
  text-align: center;
  padding: var(--space-sm) var(--space-2xs);
  border-radius: var(--radius-md);
  will-change: transform;
}

.proof-number {
  display: inline-block;
  font-size: clamp(1.75rem, 1.3rem + 2vw, 3rem);
  font-weight: 800;
  color: var(--text-strong);
  font-variant-numeric: tabular-nums;
  transform: scale(0.7);
  transform-origin: center bottom;
  transition: transform 1800ms var(--ease-out) 150ms;
  will-change: transform;
}

.proof-strip.is-visible .proof-number {
  /* 원래 디자인 크기(scale(1))보다 더 크게, 천천히 자랍니다. */
  transform: scale(1.22);
}

@media (prefers-reduced-motion: reduce) {
  .proof-number {
    transform: none;
    transition: none;
  }
}

.proof-number::after {
  content: attr(data-suffix);
  color: var(--accent);
}

.proof-number--static::after {
  content: '';
}

.proof-label {
  font-size: var(--fs-xs);
  color: var(--text-meta);
  letter-spacing: 0.02em;
}

.proof-note {
  text-align: center;
  font-size: var(--fs-xs);
  color: var(--text-meta);
  margin-top: var(--space-lg);
}

/* ---- Studio ---- */

.studio-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-2xl);
  align-items: center;
}

.studio-body {
  font-size: var(--fs-body-lg);
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: var(--space-md);
  max-width: 52ch;
}

.studio-media {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-hairline);
}

.studio-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.studio-media-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  z-index: 1;
  transition: opacity 900ms ease;
}

.studio-media-slide.is-active {
  opacity: 1;
  z-index: 2;
}

@media (prefers-reduced-motion: reduce) {
  .studio-media-slide {
    transition: none;
    display: none;
  }
  .studio-media-slide.is-active {
    display: block;
  }
}

/* ---- Services ---- */

.service-tracks {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.service-track {
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-hairline-strong);
  background: linear-gradient(165deg, rgba(43,57,64,0.62), rgba(17,27,32,0.7));
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  box-shadow:
    0 24px 48px rgba(10, 15, 18, 0.55),
    inset 0 1px 0 rgba(247, 249, 250, 0.16),
    inset 0 -1px 0 rgba(10, 15, 18, 0.4),
    inset 0 0 60px rgba(45, 182, 218, 0.05);
  position: relative;
  overflow: hidden;
  transition: transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out);
}

.service-track:hover {
  transform: translateY(-3px);
  box-shadow:
    0 28px 56px rgba(10, 15, 18, 0.6),
    inset 0 1px 0 rgba(247, 249, 250, 0.22),
    inset 0 -1px 0 rgba(10, 15, 18, 0.4),
    inset 0 0 70px rgba(45, 182, 218, 0.09);
}

.service-track::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
}

.service-track--film::before {
  background: linear-gradient(90deg, var(--cyan-500), var(--deep-blue));
}

.service-track--live::before {
  /* Client confirmed 2026-07-18: Live accent is flat #2DB6DA (cyan-500),
     not a distinct green — start/end the same color per their instruction. */
  background: linear-gradient(90deg, var(--cyan-500), var(--cyan-500));
}

.service-label {
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  color: var(--text-meta);
  margin-bottom: var(--space-xs);
}

.service-name {
  font-size: var(--fs-h2);
  font-weight: 800;
  color: var(--text-strong);
  margin-bottom: var(--space-sm);
}

.service-headline {
  font-size: var(--fs-body-lg);
  font-weight: 700;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

.service-desc {
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: var(--space-md);
}

.service-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xs) var(--space-md);
  border-top: 1px solid var(--border-hairline);
  padding-top: var(--space-md);
}

.service-list li {
  font-size: var(--fs-sm);
  color: var(--text-primary);
  position: relative;
  padding-left: var(--space-sm);
}

.service-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 1px;
}

/* ---- Works ---- */

.works-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.works-more {
  text-align: center;
  margin-top: var(--space-xl);
}

/* ---- Why ---- */

.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

/* ---- Network ---- */

.network-body {
  font-size: var(--fs-body-lg);
  color: var(--text-muted);
  max-width: 60ch;
  margin-top: var(--space-md);
  line-height: 1.65;
}

.network-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-xl);
}

/* ---- Clients ---- */

.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-xl);
}

.clients-grid li {
  background: var(--white);
  border-radius: var(--radius-md);
  aspect-ratio: 2.1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  filter: grayscale(0%);
  transition: transform var(--dur-fast) var(--ease-out);
}

.clients-grid li:hover {
  transform: translateY(-2px);
}

.clients-grid img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.clients-caption {
  text-align: center;
  color: var(--text-muted);
  font-size: var(--fs-sm);
  margin-top: var(--space-lg);
}

.credentials-note {
  text-align: center;
  color: var(--text-meta);
  font-size: var(--fs-xs);
  margin-top: var(--space-sm);
}

/* ---- Contact ---- */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: var(--space-2xl);
}

.contact-sub {
  font-size: var(--fs-body-lg);
  color: var(--text-muted);
  margin-top: var(--space-md);
  max-width: 42ch;
  line-height: 1.6;
}

.contact-list {
  margin-top: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border-hairline);
}

.contact-label {
  font-size: var(--fs-xs);
  color: var(--text-meta);
}

.contact-list a {
  font-size: var(--fs-body-lg);
  font-weight: 700;
  color: var(--text-strong);
  transition: color var(--dur-fast) var(--ease-out);
}

.contact-list a:hover {
  color: var(--accent);
}

.contact-form {
  position: relative;
  overflow: hidden;
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-hairline);
  background: var(--bg-raised-glass);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  box-shadow: var(--shadow-card);
}

.contact-form::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  background: linear-gradient(90deg, rgba(247,249,250,0.45), rgba(247,249,250,0) 65%);
}

/* ---- Footer ---- */

.site-footer {
  padding-block: var(--space-xl);
  border-top: 1px solid var(--border-hairline);
  background: var(--bg-sunken);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.brand-mark--footer {
  height: 36px;
  opacity: 0.85;
}

.footer-slogan {
  font-size: var(--fs-sm);
  color: var(--text-meta);
  font-style: italic;
}

.footer-links {
  display: flex;
  gap: var(--space-md);
}

.footer-links a {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-copy {
  width: 100%;
  font-size: var(--fs-xs);
  color: var(--text-meta);
  margin-top: var(--space-sm);
  border-top: 1px solid var(--border-hairline);
  padding-top: var(--space-md);
}

/* ============================================================
   Responsive
=============================================================== */

@media (max-width: 1180px) {
  .proof-grid { grid-template-columns: repeat(3, 1fr); }
  .proof-item:nth-child(4), .proof-item:nth-child(5) { grid-column: span 1; }
  .network-grid { grid-template-columns: repeat(3, 1fr); }
  .works-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  section { padding-block: var(--space-xl); }

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

  .studio-media { order: -1; }

  .service-tracks {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  .hero { min-height: 100dvh; }
  .hero-inner { padding-top: 88px; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { width: 100%; }

  .proof-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .proof-item:last-child { grid-column: span 2; }

  .works-grid { grid-template-columns: 1fr; }
  .works-head { align-items: flex-start; }

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

  .service-list { grid-template-columns: 1fr; }

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

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

  .form-row--split { grid-template-columns: 1fr; }

  .footer-inner { flex-direction: column; align-items: flex-start; }
}