/* ============================================
   KRIYA CASE STUDY — Styles
   Dark, minimal, typographic
   ============================================ */


/* ── NAV ──────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-4) var(--space-8);
  background: linear-gradient(to bottom, rgba(10,10,10,0.85) 0%, transparent 100%);
  backdrop-filter: blur(0px);
  transition: background 0.4s ease, backdrop-filter 0.4s ease;
}

.site-nav.scrolled {
  background: rgba(10,10,10,0.92);
  backdrop-filter: blur(12px);
}

.nav-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.nav-back {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
}

.nav-back:hover { color: var(--color-text); opacity: 1; }

.nav-title {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}


/* ── HERO ─────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  padding-bottom: var(--space-16);
  overflow: hidden;
}

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

.hero-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to top,  rgba(10,10,10,0.88) 0%,  rgba(10,10,10,0.2) 55%, transparent 100%),
    linear-gradient(to right, rgba(10,10,10,0.55) 0%, transparent 60%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--content-wide);
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.hero-eyebrow {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.65);
  margin-bottom: var(--space-2);
  letter-spacing: 0.04em;
}

.hero-title {
  font-size: clamp(2.5rem, 1rem + 5vw, 4.5rem);
  color: #ffffff;
  line-height: 1.05;
  margin-bottom: var(--space-4);
}

.hero-desc {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.75);
  margin-bottom: var(--space-6);
  max-width: 48ch;
  line-height: 1.6;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
}

/* На десктопе локация уходит вправо */
.hero-meta > :last-child {
  margin-left: auto;
  text-align: right;
}

/* Убираем разделитель перед локацией вообще */
.hero-meta > :nth-last-child(2) {
  display: none;
}

.hero-meta-sep { opacity: 0.4; }

.hero-scroll-cue {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  color: rgba(255,255,255,0.35);
  animation: bounce-down 2s ease-in-out infinite;
  transition: color var(--transition-interactive);
}

.hero-scroll-cue:hover { color: rgba(255,255,255,0.7); opacity: 1; }

@keyframes bounce-down {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

@media (max-width: 768px) {
  .hero-meta > :last-child {
    display: none;
  }
}

/* ── QUICK FACTS ──────────────────────────── */
.quick-facts {
  background: var(--color-bg);
  padding: clamp(var(--space-8), 4vw, var(--space-12)) var(--space-8);
  border-top: 1px solid var(--color-border);
}

.qf-grid {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.qf-card {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.qf-card-label {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.2;
}

.qf-card-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.qf-card-body p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: none;
}

.qf-meta {
  color: var(--color-text-faint);
  font-size: var(--text-sm);
}

.qf-link {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.qf-link:hover { opacity: 0.8; }


/* ── MY ROLE ──────────────────────────────── */
.my-role {
  padding: clamp(var(--space-8), 4vw, var(--space-12)) 0;
  border-top: 1px solid var(--color-border);
}

.role-header {
  padding: var(--space-6) var(--space-8);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.role-main-title {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.role-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 60ch;
}

.role-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  max-width: var(--content-wide);
  margin: 0 auto;
}

.role-col {
  padding: var(--space-6) var(--space-8);
  border-right: 1px solid var(--color-border);
}

.role-col:last-child { border-right: none; }

.role-col--light {
  background: var(--color-bg);
}

/* Nested dark block inside Technical Direction */
.role-nested-dark {
  margin-top: var(--space-5);
  padding: var(--space-4);
  background: #111111;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.role-nested-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
  line-height: 1.3;
}

.role-col-title {
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
  line-height: 1.3;
}

.role-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.role-list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.4;
  padding-left: var(--space-4);
  position: relative;
  max-width: none;
}

.role-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 5px;
  height: 1px;
  background: var(--color-text-faint);
}

.role-note {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-1);
}


/* ── VIDEO SECTION ────────────────────────── */
.video-section {
  padding: clamp(var(--space-16), 8vw, var(--space-24)) var(--space-8);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

.section-title {
  font-size: var(--text-xl);
  color: var(--color-text);
  max-width: var(--content-wide);
  margin: 0 auto var(--space-10);
}

.video-wrapper {
  max-width: 960px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #000;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 16 / 9;
}

.project-video {
  width: 100%;
  height: 100%;
  display: block;
  background: #000;
}


/* ── SYSTEM OVERVIEW ──────────────────────── */
.system-overview {
  padding: clamp(var(--space-16), 8vw, var(--space-24)) var(--space-8);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.system-header {
  max-width: var(--content-wide);
  margin: 0 auto var(--space-12);
}

/* Signal flow — SVG diagram */
.signal-flow-svg {
  max-width: var(--content-wide);
  margin: 0 auto;
  overflow-x: auto;
}

.sf-svg {
  width: 100%;
  height: auto;
  min-width: 640px;
  display: block;
}

.sf-svg-img {
  width: 100%;
  height: auto;
  display: block;
}


/* ── KEY ELEMENTS ─────────────────────────── */
.key-elements {
  padding: clamp(var(--space-16), 8vw, var(--space-24)) var(--space-8);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

.ke-header {
  max-width: var(--content-wide);
  margin: 0 auto var(--space-12);
}

.ke-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-top: var(--space-3);
}

.ke-row {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
  padding: var(--space-12) 0;
}

.ke-row--image-right .ke-text { order: 1; }
.ke-row--image-right .ke-media { order: 2; }

.ke-divider {
  max-width: var(--content-wide);
  margin: 0 auto;
  height: 1px;
  background: var(--color-border);
}

.ke-element-title {
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.ke-details {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.ke-details li {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
  line-height: 1.6;
  max-width: 52ch;
}

.ke-details li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 10px;
  height: 1px;
  background: var(--color-text-faint);
}

.ke-media {
  display: flex;
  align-items: center;
  justify-content: center;
}

.ke-images {
  width: 100%;
}

.ke-images--stack {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  justify-content: space-between;
  gap: var(--space-4);
  height: 224px;
}

.ke-img {
  height: 100%;
  width: auto;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}

.ke-img--primary {
  align-self: flex-start;
  margin-right: auto;
}

.ke-img--secondary {
  align-self: flex-end;
  margin-left: auto;
}

.ke-images--equal .ke-img:first-child {
  align-self: flex-start;
  margin-right: auto;
}

.ke-images--equal .ke-img:last-child {
  align-self: flex-end;
  margin-left: auto;
}

.ke-nav {
  display: none;
}

.ke-slide {
  display: contents;
}

/* <source> inside a display:contents <picture> becomes a flex item
   and adds extra gaps — keep it out of the layout */
.ke-slide source {
  display: none;
}

@media (max-width: 768px) {
  .ke-row {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    padding: var(--space-8) 0;
  }

  .ke-text {
    display: block;
    width: 100%;
    order: 2;
  }

  .ke-media {
    width: 100%;
    order: 1;
  }

  .ke-media--carousel {
    position: relative;
  }

  .ke-images--carousel {
  position: relative;
  width: 100%;
  height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.ke-slide {
  display: none;
  width: 100%;
  height: 100%;
  align-items: center;
  justify-content: center;
}

.ke-slide.ke-slide--active {
  display: flex;
}

.ke-slide .ke-img {
  width: 100%;
  height: 100%;
  margin: 0 auto;
  object-fit: contain;
}

  .ke-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    background: rgba(0,0,0,0.3);
    backdrop-filter: blur(3px);
    border-radius: 999px;
    padding: 0;
    border: 1px solid rgba(255,255,255,0.18);
    color: rgba(235,235,235,0.92);
    cursor: pointer;
  }

  .ke-nav--next {
    right: var(--space-2);
  }

  .ke-nav--prev {
    left: var(--space-2);
  }

  .ke-nav span {
    display: block;
    width: 9px;
    height: 9px;
    border-top: 1.5px solid currentColor;
    border-right: 1.5px solid currentColor;
    filter: drop-shadow(0 0 2px rgba(0,0,0,0.45));
  }

  .ke-nav--next span {
    transform: rotate(45deg);
  }

  .ke-nav--prev span {
    transform: rotate(-135deg);
  }

  .ke-nav.is-hidden {
    display: none;
  }
}
/* ── VISUALIZATION ────────────────────────── */
.visualization {
  position: relative;
  background: #000;
  overflow: hidden;
}

/* Общее поведение видео: по ширине секции, с сохранением пропорций */
.viz-video {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* По умолчанию показываем десктопную версию, мобильную скрываем */
.viz-video--desktop {
  display: block;
}

.viz-video--mobile {
  display: none;
}

@media (max-width: 768px) {
  .viz-video--desktop {
    display: none;
  }

  .viz-video--mobile {
    display: block;
  }
}

/* ── MORE PROJECTS ───────────────────────── */
.more-projects {
  padding: clamp(var(--space-16), 8vw, var(--space-24)) var(--space-8);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

.more-projects-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.more-projects-title {
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-5);
}

.mp-divider {
  grid-column: 1 / -1;
  height: 1px;
  width: 100%;
  background-color: var(--color-border);
  margin: var(--space-10) 0;
}

.more-projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8) var(--space-12);
  align-items: stretch;
}

.mp-case {
  min-width: 0;
}

.mp-case--text {
  display: flex;
  align-items: stretch;
  height: 100%;
}

.mp-copy {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  width: 100%;
}

.mp-copy-top {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.mp-title {
  font-size: clamp(1.05rem, 0.82rem + 1.55vw, 2rem);
  line-height: 1.02;
  color: #ffffff;
  margin-bottom: var(--space-4);
  max-width: 30ch;
}

.mp-role {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  font-weight: 600;
  margin-bottom: 0;
}

.mp-meta {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  font-weight: 600;
  max-width: 22ch;
  line-height: 1.35;
}
.mp-case--media {
  display: flex;
  align-items: center;
  justify-content: center;
}

.mp-video-shell {
  width: 100%;
  background: #000;
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.mp-video-shell--landscape {
  aspect-ratio: 16 / 9;
}

.mp-video-shell--portrait {
  aspect-ratio: 9 / 16;
  max-width: 26rem;
  margin-left: auto;
  margin-right: auto;
}

.mp-video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  background: #000;
}
@media (max-width: 768px) {
  .more-projects-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .mp-case--seesaw-text {
    order: 1;
    margin-top: 0;
  }

  .mp-case--seesaw-video {
    order: 2;
  }

  .mp-divider {
    order: 3;
    margin: var(--space-8) 0;
  }

  .mp-case--nest-text {
    order: 4;
  }

  .mp-case--nest-video {
    order: 5;
  }

  .mp-title {
    max-width: 12ch;
  }

  .mp-video-shell--portrait {
    max-width: 100%;
    margin-left: 0;
    margin-right: 0;
  }
}
/* ── FOOTER ───────────────────────────────── */
.site-footer {
  padding: var(--space-8);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

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

.footer-label {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  max-width: none;
}

.footer-nav {
  display: flex;
  gap: var(--space-6);
}

.footer-nav a {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
}

.footer-nav a:hover { color: var(--color-text-muted); opacity: 1; }


/* ══════════════════════════════════════
   RESPONSIVE — TABLET  ≤ 900px
══════════════════════════════════════ */
@media (max-width: 900px) {

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

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

  .role-col {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .role-col:last-child { border-bottom: none; }

  .signal-flow-svg {
    padding: var(--space-4);
  }

  .ke-row {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .ke-row--image-right .ke-text { order: 2; }
  .ke-row--image-right .ke-media { order: 1; }

  .ke-images--stack {
    grid-template-columns: 1fr 1fr;
  }

}


/* ══════════════════════════════════════
   RESPONSIVE — MOBILE  ≤ 600px
══════════════════════════════════════ */
@media (max-width: 600px) {

  .site-nav,
  .hero-content,
  .quick-facts,
  .video-section,
  .system-overview,
  .key-elements,
  .site-footer {
    padding-left: var(--space-5);
    padding-right: var(--space-5);
  }

  .role-header,
  .role-columns,
  .system-header,
  .signal-flow-svg {
    padding-left: var(--space-5);
    padding-right: var(--space-5);
  }

  .qf-grid { gap: var(--space-3); }

  .ke-images--stack {
    grid-template-columns: 1fr;
  }

  .ke-img--secondary { display: none; }

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

  .section-title,
  .role-main-title {
    font-size: var(--text-xl);
  }
}