/* Invention disclosure page — Hybrid Battery System */

@keyframes inv-fade-up {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes inv-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.invention-page {
  position: relative;
}

.invention-page__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.03);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.invention-page__img.is-loaded {
  opacity: 1;
  transform: scale(1);
}

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

.invention-page__hero {
  position: relative;
  isolation: isolate;
  padding: clamp(3rem, 7vw, 5.5rem) var(--page-gutter) clamp(3rem, 7vw, 5rem);
  overflow: hidden;
  color: #fffdf6;
}

.invention-page__hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.invention-page__hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.invention-page__hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(28, 36, 12, 0.85) 0%, rgba(46, 50, 16, 0.7) 45%, rgba(46, 50, 16, 0.55) 100%),
    radial-gradient(ellipse 60% 55% at 80% 80%, rgba(184, 134, 11, 0.35) 0%, transparent 60%);
  z-index: -1;
}

.invention-page__hero-inner {
  max-width: 56rem;
  margin: 0 auto;
  text-align: center;
}

.invention-page__hero-inner > * {
  opacity: 0;
  animation: inv-fade-up 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.invention-page__hero-inner > *:nth-child(1) { animation-delay: 0.05s; }
.invention-page__hero-inner > *:nth-child(2) { animation-delay: 0.14s; }
.invention-page__hero-inner > *:nth-child(3) { animation-delay: 0.24s; }
.invention-page__hero-inner > *:nth-child(4) { animation-delay: 0.34s; }

.invention-page__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  padding: 0.4rem 1rem;
  border-radius: 999px;
  background: rgba(255, 253, 246, 0.14);
  border: 1px solid rgba(255, 253, 246, 0.32);
  color: rgba(255, 253, 246, 0.95);
}

.invention-page__eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 10px rgba(184, 134, 11, 0.85);
}

.invention-page__title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.2vw, 2.85rem);
  font-weight: 800;
  line-height: 1.15;
  margin: 1rem 0 1.1rem;
  text-shadow: 0 4px 28px rgba(0, 0, 0, 0.3);
}

.invention-page__br {
  display: none;
}

@media (min-width: 720px) {
  .invention-page__br { display: inline; }
}

.invention-page__lead {
  font-size: clamp(1rem, 1.25vw, 1.1rem);
  line-height: 1.6;
  max-width: 44rem;
  margin: 0 auto 1.5rem;
  color: rgba(255, 253, 246, 0.92);
}

.invention-page__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
}

.invention-page__chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.95rem;
  font-size: 0.82rem;
  font-weight: 500;
  border-radius: 999px;
  background: rgba(255, 253, 246, 0.12);
  border: 1px solid rgba(255, 253, 246, 0.28);
  color: rgba(255, 253, 246, 0.95);
}

.invention-page__chip strong {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.invention-page__chip--accent {
  background: linear-gradient(135deg, rgba(184, 134, 11, 0.85), rgba(120, 87, 4, 0.85));
  border-color: rgba(184, 134, 11, 0.95);
  color: #fffdf6;
}

/* ---------- Inner shell ---------- */

.invention-page__inner {
  width: 100%;
  max-width: min(72rem, 100%);
  margin: 0 auto;
  padding: clamp(2.5rem, 5vw, 4rem) var(--page-gutter) clamp(3rem, 6vw, 4.5rem);
}

.invention-page__section {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
  opacity: 0;
  animation: inv-fade-in 0.8s ease forwards;
  animation-delay: 0.1s;
}

.invention-page__kicker {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.55rem;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  background: rgba(107, 142, 35, 0.12);
}

.invention-page__section > h2,
.invention-page h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.4vw, 1.8rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-primary-dark);
  margin: 0 0 0.85rem;
}

.invention-page__section-lead {
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text-muted);
  max-width: 48rem;
  margin: 0 0 1.75rem;
}

/* ---------- Field of invention ---------- */

.invention-page__field {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: center;
}

@media (min-width: 880px) {
  .invention-page__field {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 2.5rem;
  }
}

.invention-page__field-text p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  margin: 0 0 0.85rem;
}

.invention-page__field-media {
  position: relative;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 26px 60px -32px rgba(46, 50, 16, 0.5);
  background: linear-gradient(135deg, rgba(107, 142, 35, 0.18), rgba(245, 238, 220, 0.55));
}

.invention-page__field-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(46, 50, 16, 0) 60%, rgba(46, 50, 16, 0.18) 100%);
  pointer-events: none;
}

/* ---------- Issues ---------- */

.invention-page__issues-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: start;
}

@media (min-width: 980px) {
  .invention-page__issues-layout {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.3fr);
    gap: 2.25rem;
  }
}

.invention-page__issues-media {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(107, 142, 35, 0.16), rgba(245, 238, 220, 0.6));
  box-shadow: 0 28px 60px -36px rgba(46, 50, 16, 0.5);
}

@media (max-width: 979px) {
  .invention-page__issues-media {
    aspect-ratio: 16 / 9;
  }
}

.invention-page__issues-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr));
  gap: 0.85rem;
}

.invention-page__issue {
  display: flex;
  gap: 0.85rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-lg);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  box-shadow: 0 14px 32px -28px rgba(46, 50, 16, 0.45);
  transition:
    transform 0.3s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.3s ease,
    border-color 0.25s ease;
}

.invention-page__issue:hover {
  transform: translateY(-3px);
  border-color: rgba(107, 142, 35, 0.4);
  box-shadow: 0 18px 40px -22px rgba(46, 50, 16, 0.5);
}

.invention-page__issue h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
  color: var(--color-primary-dark);
}

.invention-page__issue p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--color-text-muted);
}

.invention-page__issue-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(107, 142, 35, 0.14);
  color: var(--color-primary-dark);
  transition: background 0.3s ease, transform 0.3s ease;
}

.invention-page__issue:hover .invention-page__issue-icon {
  background: rgba(107, 142, 35, 0.24);
  transform: scale(1.06);
}

/* ---------- Pillars ---------- */

.invention-page__pillars {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.invention-page__pillar {
  display: grid;
  grid-template-columns: 1fr;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  box-shadow: 0 22px 50px -30px rgba(46, 50, 16, 0.45);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.35s ease, border-color 0.25s ease;
}

.invention-page__pillar:hover {
  transform: translateY(-4px);
  box-shadow: 0 28px 60px -28px rgba(46, 50, 16, 0.55);
  border-color: rgba(107, 142, 35, 0.4);
}

@media (min-width: 880px) {
  .invention-page__pillar {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.4fr);
  }

  .invention-page__pillar:nth-child(even) {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.95fr);
  }

  .invention-page__pillar:nth-child(even) .invention-page__pillar-media {
    order: 2;
  }
}

.invention-page__pillar-media {
  position: relative;
  aspect-ratio: 16 / 11;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(107, 142, 35, 0.18), rgba(245, 238, 220, 0.5));
}

.invention-page__pillar-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(46, 50, 16, 0) 55%, rgba(46, 50, 16, 0.25) 100%);
}

.invention-page__pillar:hover .invention-page__pillar-media .invention-page__img.is-loaded {
  transform: scale(1.05);
}

.invention-page__pillar-tag {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 1;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 253, 246, 0.92);
  color: var(--color-primary-dark);
  border: 1px solid rgba(107, 142, 35, 0.4);
}

.invention-page__pillar-body {
  padding: 1.4rem 1.5rem 1.6rem;
}

.invention-page__pillar-body h3 {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.4rem);
  font-weight: 800;
  margin: 0 0 0.85rem;
  color: var(--color-primary-dark);
}

.invention-page__pillar-block {
  margin-bottom: 0.95rem;
}

.invention-page__pillar-block p {
  margin: 0.25rem 0 0;
  font-size: 0.93rem;
  line-height: 1.65;
  color: var(--color-text);
}

.invention-page__pillar-label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: rgba(107, 142, 35, 0.1);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}

.invention-page__pillar-highlights {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.invention-page__pillar-highlights li {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-primary-dark);
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: rgba(184, 134, 11, 0.12);
  border: 1px solid rgba(184, 134, 11, 0.3);
}

/* ---------- Conclusion ---------- */

.invention-page__conclusion {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: center;
  padding: clamp(1.5rem, 3.5vw, 2.5rem);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(107, 142, 35, 0.1) 0%, rgba(245, 238, 220, 0.7) 100%);
  border: 1px solid rgba(224, 216, 192, 0.9);
}

@media (min-width: 880px) {
  .invention-page__conclusion {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: 2.5rem;
  }

  .invention-page__conclusion-media {
    order: 2;
  }
}

.invention-page__conclusion-media {
  position: relative;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(107, 142, 35, 0.18), rgba(245, 238, 220, 0.55));
  box-shadow: 0 22px 50px -32px rgba(46, 50, 16, 0.5);
}

.invention-page__conclusion-text p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  margin: 0 0 0.85rem;
}

.invention-page__conclusion-strong {
  font-weight: 600;
  color: var(--color-primary-dark);
}

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

.invention-page__footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  margin-top: 2.25rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.invention-page__footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--color-primary-dark);
  text-decoration: none;
  padding: 0.5rem 0.95rem;
  border-radius: 999px;
  border: 1px solid rgba(107, 142, 35, 0.35);
  background: rgba(255, 253, 246, 0.7);
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.invention-page__footer-links a:hover {
  transform: translateY(-2px);
  background: rgba(107, 142, 35, 0.12);
  border-color: var(--color-primary);
  box-shadow: 0 8px 20px -12px rgba(46, 50, 16, 0.35);
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  .invention-page__hero-inner > *,
  .invention-page__section {
    animation: none !important;
    opacity: 1 !important;
  }

  .invention-page__img {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .invention-page__pillar:hover,
  .invention-page__issue:hover,
  .invention-page__footer-links a:hover {
    transform: none;
  }
}