/* ============================================================
   index.css — Styles for the IP showcase listing page
   ============================================================ */

/* ----------------------------------------------------------
   1. Hero Section
   ---------------------------------------------------------- */
.hero {
  position: relative;
  width: 100%;
  background: #F3F7FF;
  overflow: hidden;
}

.hero__media {
  position: relative;
  width: 100%;
  height: auto;
  min-height: 0;
  aspect-ratio: 1920 / 1102;
  overflow: hidden;
  background: #075478;
}

.hero__image {
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: contain;
  object-position: center center;
  transform-origin: center;
}

.hero__identity {
  position: relative;
  background: #F3F7FF;
  border-top: 5px solid var(--primaryLighter);
  border-bottom: 1px solid #D9E4F2;
}

.hero__identity-inner {
  min-height: 184px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-10);
  padding-top: var(--sp-8);
  padding-bottom: var(--sp-8);
}

.hero__content {
  max-width: 780px;
  text-align: left;
}

.hero__eyebrow {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--primaryLight);
  margin-bottom: var(--sp-2);
  opacity: 0;
  animation: heroFadeUp .8s var(--ease-out) .2s forwards;
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: 900;
  line-height: 1.18;
  color: var(--primary);
  margin-bottom: var(--sp-2);
  opacity: 0;
  animation: heroFadeUp .8s var(--ease-out) .45s forwards;
}

.hero__subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  opacity: 0;
  animation: heroFadeUp .8s var(--ease-out) .65s forwards;
}

.hero__cta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  min-height: 48px;
  padding: var(--sp-3) var(--sp-6);
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  background: var(--primary);
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 20px rgba(26,111,232,.2);
  opacity: 0;
  animation: heroFadeUp .8s var(--ease-out) .85s forwards;
}

.hero__cta:hover {
  background: var(--primaryLight);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(26,111,232,.25);
}

.hero__cta svg {
  display: inline-block;
  vertical-align: middle;
  margin-left: var(--sp-2);
  transition: transform var(--duration) var(--ease-out);
}

.hero__cta:hover svg {
  transform: translateX(4px);
}

@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ----------------------------------------------------------
   2. About / Stats Section
   ---------------------------------------------------------- */
.about {
  padding: var(--sp-16) 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(26,111,232,.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(105,167,255,.06) 0%, transparent 50%),
    linear-gradient(180deg, var(--primaryBg) 0%, var(--white) 100%);
}

.about__header {
  text-align: center;
  margin-bottom: var(--sp-12);
}

.about__label {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primaryLight);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--sp-3);
}

.about__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  color: var(--primary);
  margin-bottom: var(--sp-4);
}

.about__divider {
  width: 60px;
  height: 3px;
  background: var(--primaryLight);
  margin: 0 auto;
  border-radius: 2px;
}

.about__content {
  display: grid;
  grid-template-columns: 1fr 350px;
  gap: var(--sp-10);
  margin-bottom: var(--sp-10);
}

.about__intro {
  margin-bottom: var(--sp-8);
}

.about__lead {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.about__lead b {
  color: var(--primaryLight);
  font-weight: 700;
}

.about__features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-6);
}

.about__feature {
  display: flex;
  gap: var(--sp-4);
  padding: var(--sp-5);
  background: var(--white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  border-left: 3px solid transparent;
  transition: transform var(--duration) var(--ease-out), box-shadow var(--duration) var(--ease-out);
}

.about__feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--primaryLight);
}

.about__feature-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.about__feature-text h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: var(--sp-2);
}

.about__feature-text p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.about__sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}

.about__stats {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.about__stat {
  background: linear-gradient(135deg, var(--white) 0%, var(--primaryBg) 100%);
  border-radius: var(--radius-card);
  padding: var(--sp-5);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration) var(--ease-out);
}

.about__stat:hover {
  transform: translateY(-4px);
}

.about__stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--primaryLight);
  line-height: 1;
}

.about__stat-label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: var(--sp-1);
}

.about__stat-desc {
  display: block;
  font-size: 0.75rem;
  color: var(--text-light);
  margin-top: var(--sp-1);
}

.about__highlights {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: var(--sp-5);
  box-shadow: var(--shadow-sm);
}

.about__highlights h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--primary);
  margin-bottom: var(--sp-3);
}

.about__highlights ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.about__highlights li {
  padding: var(--sp-2) 0;
  font-size: 0.95rem;
  color: var(--text-primary);
  border-bottom: 1px solid #f0f0f0;
}

.about__highlights li:last-child {
  border-bottom: none;
}

.about__competition {
  background: var(--primary);
  color: var(--white);
  padding: var(--sp-8);
  border-radius: var(--radius-card);
  text-align: center;
}

.about__competition h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin-bottom: var(--sp-3);
}

.about__competition p {
  font-size: 1rem;
  line-height: 1.7;
  opacity: 0.9;
  max-width: 700px;
  margin: 0 auto;
}

@media (max-width: 1024px) {
  .about__content {
    grid-template-columns: 1fr;
  }
  .about__features {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .about__stats {
    flex-direction: row;
    flex-wrap: wrap;
  }
  .about__stat {
    flex: 1;
    min-width: 120px;
  }
}

/* ----------------------------------------------------------
   3. Filter Navigation
   ---------------------------------------------------------- */
.filters {
  max-width: 760px;
  margin: 0 auto;
  padding: var(--sp-8) 0 var(--sp-10);
  text-align: center;
}

.filters__search {
  position: relative;
  max-width: 480px;
  margin: 0 auto var(--sp-5);
}

.filters__search-input {
  width: 100%;
  min-height: 48px;
  padding: 0 3.25rem 0 1.15rem;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid #D8E1DC;
  border-radius: var(--radius-full);
  box-shadow: 0 8px 24px rgba(6, 31, 61, 0.08);
  font-size: 0.95rem;
  line-height: 1.4;
  outline: none;
}

.filters__search-input::placeholder {
  color: #8A9891;
}

.filters__search-input:focus {
  border-color: var(--primaryLight);
  box-shadow: 0 0 0 4px rgba(26, 111, 232, 0.12), 0 8px 24px rgba(6, 31, 61, 0.1);
}

.filters__search-icon {
  position: absolute;
  top: 50%;
  right: 1.1rem;
  width: 18px;
  height: 18px;
  color: var(--primary);
  pointer-events: none;
  transform: translateY(-50%);
}

.filters__btns {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-2);
}

.filters__btn {
  padding: var(--sp-2) var(--sp-5);
  padding: var(--sp-2) var(--sp-5);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--white);
  border: 1px solid #DDE5E0;
  border-radius: var(--radius-full);
  cursor: pointer;
  box-shadow: 0 3px 12px rgba(31, 41, 55, 0.04);
}

.filters__btn:hover {
  color: var(--primaryLight);
  border-color: var(--primaryLight);
  background: var(--primaryBg);
}

.filters__btn--active {
  color: var(--white);
  background: var(--primaryLight);
  border-color: var(--primaryLight);
  box-shadow: 0 5px 14px rgba(26,111,232,.16);
}

/* ----------------------------------------------------------
   4. Works Grid
   ---------------------------------------------------------- */
.works {
  padding: var(--sp-12) 0 var(--sp-20);
  background: var(--bg-alt);
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-6);
}

/* ----------------------------------------------------------
   5. Work Card
   ---------------------------------------------------------- */
.work-card {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--white);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: transform var(--duration) var(--ease-out),
              box-shadow var(--duration) var(--ease-out);
}

.work-card.work-card--visible {
  opacity: 1;
  transform: translateY(0);
}

.work-card:hover {
  transform: translateY(-12px) scale(1.02);
  box-shadow: var(--shadow-xl);
}

.work-card__title {
  transition: color var(--duration) var(--ease-out);
}
.work-card:hover .work-card__title {
  color: var(--primaryLight);
}
.work-card__badge {
  transition: transform var(--duration) var(--ease-spring);
}
.work-card:hover .work-card__badge {
  transform: translateY(-4px);
}
.work-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primaryLight), var(--primaryLighter));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-out);
  z-index: 2;
}
.work-card:hover::after {
  transform: scaleX(1);
}

.work-card__img-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #F3F4F6;
}

.work-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s var(--ease-out);
}

.work-card:hover .work-card__img {
  transform: scale(1.06);
}

/* Award badge */
.work-card__badge {
  position: absolute;
  top: var(--sp-3);
  right: var(--sp-3);
  padding: var(--sp-1) var(--sp-3);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--white);
  border-radius: var(--radius-full);
  z-index: 2;
}
.work-card__badge--1 { background: var(--gold); }
.work-card__badge--2 { background: var(--silver); }
.work-card__badge--3 { background: var(--bronze); }
.work-card__badge--4 { background: var(--merit); }

/* Card info */
.work-card__info {
  padding: var(--sp-4);
}

.work-card__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: var(--sp-1);
}

.work-card__authors {
  font-size: 0.85rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Staggered entrance delays (set via inline style or JS, fallback here) */
.work-card:nth-child(1)  { transition-delay: 0ms; }
.work-card:nth-child(2)  { transition-delay: 60ms; }
.work-card:nth-child(3)  { transition-delay: 120ms; }
.work-card:nth-child(4)  { transition-delay: 180ms; }
.work-card:nth-child(5)  { transition-delay: 240ms; }
.work-card:nth-child(6)  { transition-delay: 300ms; }
.work-card:nth-child(7)  { transition-delay: 360ms; }
.work-card:nth-child(8)  { transition-delay: 420ms; }
.work-card:nth-child(9)  { transition-delay: 480ms; }
.work-card:nth-child(10) { transition-delay: 540ms; }
.work-card:nth-child(11) { transition-delay: 600ms; }
.work-card:nth-child(12) { transition-delay: 660ms; }

/* ----------------------------------------------------------
   6. Responsive
   ---------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero__title {
    font-size: 2.5rem;
  }

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

@media (max-width: 768px) {
  .hero__media {
    height: auto;
    min-height: 0;
    aspect-ratio: 1920 / 1102;
  }

  .hero__identity-inner {
    min-height: 0;
    align-items: flex-start;
    flex-direction: column;
    gap: var(--sp-5);
    padding-top: var(--sp-6);
    padding-bottom: var(--sp-6);
  }

  .hero__title {
    font-size: 2.1rem;
  }

  .hero__cta {
    width: 100%;
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: var(--sp-8);
  }

  .works-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-4);
  }
}

@media (max-width: 480px) {
  .hero__identity {
    border-top-width: 4px;
  }

  .hero__eyebrow {
    font-size: 0.78rem;
    line-height: 1.5;
  }

  .hero__title {
    font-size: 1.8rem;
  }

  .hero__subtitle {
    font-size: 0.92rem;
  }

  .works-grid {
    grid-template-columns: 1fr;
    gap: var(--sp-4);
  }
  .work-card__info {
    padding: var(--sp-3);
  }
  .work-card__title {
    font-size: 0.95rem;
  }
  .work-card__authors {
    font-size: 0.8rem;
  }
  .filters {
    padding: var(--sp-4) 0;
  }
  .filters__btn {
    padding: var(--sp-1) var(--sp-3);
    font-size: 0.8rem;
  }

  .about__stats {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-3);
  }

  .stat-card__number {
    font-size: 1.8rem;
  }
}