/* ═══════════════════════════════════════════════
   NSK Aviation — Homepage Section Styles
═══════════════════════════════════════════════ */

/* ══════════════ HERO ══════════════ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: var(--navy);
}

/* Atmospheric background */
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-bg-img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.18;
  filter: saturate(0.4) brightness(0.6);
  transform: scale(1.04);
  transition: transform 8s ease;
}
.hero-bg-img.loaded { transform: scale(1); }

.hero-overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(to bottom, rgba(9,22,42,0.6) 0%, rgba(9,22,42,0.2) 40%, rgba(9,22,42,0.85) 100%),
    radial-gradient(ellipse at 25% 60%, rgba(201,165,92,0.07) 0%, transparent 55%),
    radial-gradient(ellipse at 75% 30%, rgba(201,165,92,0.04) 0%, transparent 50%);
}

/* Grid texture */
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(201,165,92,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201,165,92,0.035) 1px, transparent 1px);
  background-size: 80px 80px;
}

.hero-content {
  position: relative; z-index: 2;
  text-align: center;
  max-width: 940px;
  padding: 0 var(--gutter);
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}
.hero-label .line {
  width: 30px; height: 1px;
  background: var(--gold);
  opacity: 0.7;
}

.hero-h1 {
  font-family: var(--font-serif);
  font-size: clamp(48px, 7vw, 88px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.05;
  letter-spacing: -1px;
  margin-bottom: 28px;
}
.hero-h1 em {
  font-style: italic;
  color: var(--gold);
  position: relative;
}

.hero-sub {
  font-size: clamp(15px, 1.6vw, 19px);
  color: var(--grey-light);
  line-height: 1.75;
  max-width: 580px;
  margin: 0 auto 44px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 80px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  background: rgba(9,22,42,0.5);
  backdrop-filter: blur(10px);
  max-width: 680px;
  margin: 0 auto;
}

.hero-stat {
  flex: 1;
  padding: 28px 20px;
  text-align: center;
  border-right: 1px solid var(--border);
  position: relative;
}
.hero-stat:last-child { border-right: none; }

.hero-stat-num {
  font-family: var(--font-serif);
  font-size: clamp(32px, 4vw, 46px);
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
  display: block;
}
.hero-stat-label {
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--grey);
  font-family: var(--font-mono);
  margin-top: 8px;
  display: block;
}

.hero-scroll {
  position: absolute;
  bottom: 36px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  z-index: 2;
  cursor: pointer;
}
.hero-scroll span {
  font-size: 9px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--grey);
  font-family: var(--font-mono);
}
.hero-scroll-line {
  width: 1px;
  height: 50px;
  background: linear-gradient(to bottom, var(--gold) 0%, transparent 100%);
  animation: scrollPulse 2.5s ease-in-out infinite;
}

/* ══════════════ TICKER ══════════════ */
.ticker-bar {
  background: var(--navy-mid);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
  overflow: hidden;
  position: relative;
}
.ticker-bar::before,
.ticker-bar::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  width: 80px;
  z-index: 2;
  pointer-events: none;
}
.ticker-bar::before { left: 0; background: linear-gradient(to right, var(--navy-mid), transparent); }
.ticker-bar::after  { right: 0; background: linear-gradient(to left,  var(--navy-mid), transparent); }

.ticker-track {
  display: flex;
  gap: 0;
  animation: ticker 30s linear infinite;
  width: max-content;
}

.ticker-item {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 40px;
  white-space: nowrap;
  font-size: 11px;
  font-family: var(--font-mono);
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--grey);
}
.ticker-dot {
  width: 4px; height: 4px;
  background: var(--gold);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ══════════════ SERVICES ══════════════ */
.services-section { padding: var(--section-pad) 0; }
.services-header {
  padding: 0 var(--gutter);
  max-width: var(--container);
  margin: 0 auto 60px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: end;
  gap: 40px;
}
@media(max-width:768px) {
  .services-header { grid-template-columns: 1fr; }
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
}

.service-card {
  position: relative;
  overflow: hidden;
  background: var(--navy);
  cursor: pointer;
  aspect-ratio: 3/4;
}

.service-img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(0.45) saturate(0.7);
  transform: scale(1.06);
  transition: transform 0.9s var(--ease),
              filter 0.9s var(--ease);
}

.service-card:hover .service-img {
  transform: scale(1.0);
  filter: brightness(0.3) saturate(0.5);
}

.service-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 36px 30px;
  background: linear-gradient(
    to top,
    rgba(9,22,42,0.98) 0%,
    rgba(9,22,42,0.6) 40%,
    transparent 70%
  );
}

.service-num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--gold);
  margin-bottom: 10px;
  opacity: 0.9;
}

.service-name {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.5vw, 30px);
  font-weight: 600;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 0;
  transition: margin-bottom var(--dur-mid) var(--ease);
}

.service-desc {
  font-size: 13px;
  color: var(--grey-light);
  line-height: 1.7;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.5s var(--ease),
              opacity 0.4s var(--ease),
              margin-top 0.4s var(--ease);
  margin-top: 0;
}

.service-card:hover .service-name { margin-bottom: 0; }
.service-card:hover .service-desc {
  max-height: 120px;
  opacity: 1;
  margin-top: 12px;
}

.service-arrow {
  position: absolute;
  top: 28px; right: 28px;
  width: 36px; height: 36px;
  border: 1px solid rgba(201,165,92,0.25);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold);
  opacity: 0;
  transform: translate(6px, -6px);
  transition: opacity var(--dur-mid) var(--ease),
              transform var(--dur-mid) var(--ease);
}
.service-card:hover .service-arrow {
  opacity: 1;
  transform: translate(0, 0);
}

@media(max-width:1200px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
}

@media(max-width:900px) {
  .services-grid { grid-template-columns: 1fr; }
  .service-card { aspect-ratio: 16/9; }
  .service-desc { max-height: 100px !important; opacity: 1 !important; margin-top: 10px !important; }
}

/* ══════════════ PARTNERS ══════════════ */
.partners-section {
  padding: var(--section-pad) var(--gutter);
  background: linear-gradient(180deg, var(--navy) 0%, var(--navy-mid) 50%, var(--navy) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.partners-inner {
  max-width: var(--container);
  margin: 0 auto;
}

.partners-header {
  text-align: center;
  margin-bottom: 70px;
}

.partner-group { margin-bottom: 52px; }
.partner-group:last-child { margin-bottom: 0; }

.partner-group-label {
  font-size: 10px;
  font-family: var(--font-mono);
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--grey);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.partner-group-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.partner-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.partner-chip {
  padding: 11px 22px;
  border: 1px solid var(--border);
  border-radius: 3px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--grey);
  background: rgba(201,165,92,0.02);
  transition: all var(--dur-mid) var(--ease);
  cursor: default;
}
.partner-chip:hover {
  border-color: var(--border-hover);
  color: var(--gold-light);
  background: rgba(201,165,92,0.06);
  transform: translateY(-1px);
}

/* ══════════════ ABOUT ══════════════ */
.about-section {
  padding: var(--section-pad) var(--gutter);
  max-width: var(--container);
  margin: 0 auto;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-visual {
  position: relative;
}
.about-img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: 4px;
  filter: brightness(0.7) saturate(0.85);
  display: block;
}
.about-frame {
  position: absolute;
  top: 18px; left: 18px; right: -18px; bottom: -18px;
  border: 1px solid rgba(201,165,92,0.18);
  border-radius: 4px;
  pointer-events: none;
  z-index: -1;
}
.about-badge {
  position: absolute;
  bottom: 28px; right: -18px;
  background: var(--navy-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 16px 20px;
  z-index: 2;
  box-shadow: var(--shadow-card);
}
.about-badge-num {
  font-family: var(--font-serif);
  font-size: 34px;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
}
.about-badge-label {
  font-size: 10px;
  font-family: var(--font-mono);
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--grey);
  margin-top: 4px;
}

.about-text { }
.about-text p {
  font-size: 15px;
  color: var(--grey-light);
  line-height: 1.9;
  margin-bottom: 18px;
}

.certifications {
  margin-top: 36px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.cert-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: rgba(201,165,92,0.02);
  transition: border-color var(--dur-mid) var(--ease);
}
.cert-item:hover { border-color: var(--border-hover); }
.cert-icon {
  width: 8px; height: 8px;
  background: var(--gold);
  border-radius: 50%;
  flex-shrink: 0;
}
.cert-text {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--text);
}

@media(max-width:900px) {
  .about-grid { grid-template-columns: 1fr; gap: 50px; }
  .about-badge { right: 20px; }
  .certifications { grid-template-columns: 1fr; }
}

/* ══════════════ WHY NSK ══════════════ */
.why-section {
  padding: var(--section-pad) var(--gutter);
  background: var(--navy-mid);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.why-inner {
  max-width: var(--container);
  margin: 0 auto;
}
.why-header {
  text-align: center;
  margin-bottom: 70px;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.why-card {
  background: var(--navy-card);
  padding: 40px 28px;
  transition: background var(--dur-mid) var(--ease);
}
.why-card:hover { background: var(--navy-light); }

.why-icon {
  width: 44px; height: 44px;
  border: 1px solid rgba(201,165,92,0.25);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--gold);
  transition: background var(--dur-mid) var(--ease), border-color var(--dur-mid) var(--ease);
}
.why-card:hover .why-icon {
  background: rgba(201,165,92,0.08);
  border-color: rgba(201,165,92,0.5);
}
.why-icon svg { width: 20px; height: 20px; }

.why-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 12px;
}
.why-desc {
  font-size: 13px;
  color: var(--grey);
  line-height: 1.75;
}

@media(max-width:1024px) { .why-grid { grid-template-columns: repeat(2,1fr); } }
@media(max-width:600px)  { .why-grid { grid-template-columns: 1fr; } }

/* ══════════════ CTA BAND ══════════════ */
.cta-band {
  padding: 100px var(--gutter);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(201,165,92,0.07) 0%, transparent 70%);
  pointer-events: none;
}
.cta-band .display { margin: 16px 0 28px; }

/* ══════════════ ANIMATIONS ══════════════ */
@keyframes scrollPulse {
  0%,100% { opacity: 0.25; transform: scaleY(0.85); }
  50%      { opacity: 1;    transform: scaleY(1); }
}

@keyframes ticker {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}