/* ============================================
   COMPONENTS — Buttons, Cards, Tags, Hero, etc.
   ============================================ */

/* ── BUTTONS ── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  line-height: 1;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

.btn--primary {
  background-color: var(--color-navy);
  color: var(--color-text-inverse);
  border-color: var(--color-navy);
}

.btn--primary:hover {
  background-color: var(--color-navy-light);
  border-color: var(--color-navy-light);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}

.btn--secondary:hover {
  background-color: var(--color-navy);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
}

.section--dark .btn--secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
}

.section--dark .btn--secondary:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: #fff;
  color: #fff;
}

.btn--accent {
  background-color: var(--color-red);
  color: var(--color-text-inverse);
  border-color: var(--color-red);
}

.btn--accent:hover {
  background-color: var(--color-red-dark);
  border-color: var(--color-red-dark);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}

.btn--ghost:hover {
  background-color: var(--gray-100);
  color: var(--color-text);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

.btn svg { width: 16px; height: 16px; }
.btn--lg svg { width: 20px; height: 20px; }

.btn .btn__arrow {
  transition: transform var(--transition-fast);
}

.btn:hover .btn__arrow {
  transform: translateX(3px);
}

/* ── TAGS ── */

.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: var(--weight-medium);
  line-height: 1.5;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.tag--default {
  background-color: var(--gray-100);
  color: var(--gray-700);
}

.tag--ai         { background-color: var(--pillar-ai-light);         color: var(--pillar-ai); }
.tag--bharatsim  { background-color: var(--pillar-bharatsim-light);  color: var(--pillar-bharatsim); }
.tag--chart      { background-color: var(--pillar-chart-light);      color: var(--pillar-chart); }
.tag--cyber      { background-color: var(--pillar-cyber-light);      color: var(--pillar-cyber); }
.tag--makerspace { background-color: var(--pillar-makerspace-light); color: var(--pillar-makerspace); }

.tag--dot::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: currentColor;
}

/* ── CARDS ── */

.card {
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.card__image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: linear-gradient(135deg, var(--pillar-bg, var(--gray-50)) 0%, var(--gray-100) 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card__image-icon {
  width: 40px;
  height: 40px;
  color: var(--pillar-color, var(--gray-300));
  opacity: 0.3;
}

.card__body {
  padding: var(--space-6);
}

.card__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.card__title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-navy);
  margin-bottom: var(--space-2);
  line-height: var(--leading-snug);
  transition: color var(--transition-fast);
}

.card:hover .card__title {
  color: var(--color-blue);
}

.card__subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.card__text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: 0;
}

.card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border-light);
}

/* ── GLASS CARD (dark sections) ── */

.card--glass {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.card--glass .card__title {
  color: #fff;
}

.card--glass .card__text {
  color: rgba(255, 255, 255, 0.7);
}

.card--glass:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.08),
    0 12px 32px -8px rgba(0, 0, 0, 0.3);
}

.card--glass:hover .card__title {
  color: #fff;
}

/* Card hover reveal prompt */
.card__hover-prompt {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-blue);
  margin-top: var(--space-3);
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.card:hover .card__hover-prompt {
  opacity: 1;
  transform: translateX(0);
}

.card__hover-prompt svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.card:hover .card__hover-prompt svg {
  transform: translateX(2px);
}

/* ── PROJECT CARD ── */

.project-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-card .card__body {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-card .card__text {
  flex: 1;
}

.project-card__pi {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.project-card__pi-avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--pillar-light, var(--gray-200)) 0%, var(--gray-200) 100%);
  object-fit: cover;
  flex-shrink: 0;
}

/* ── PERSON CARD ── */

.person-card {
  text-align: center;
  border: none;
  background: transparent;
  position: relative;
}

.person-card:hover {
  box-shadow: none;
  transform: none;
}

.person-card:has(.person-card__name a):hover {
  transform: translateY(-4px);
}

.person-card__photo {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-full);
  object-fit: cover;
  margin: 0 auto var(--space-4);
  background-color: var(--gray-200);
  transition: transform var(--transition-base);
}

.person-card:hover .person-card__photo {
  transform: scale(1.05);
}

.person-card__name {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  color: var(--color-navy);
  margin-bottom: var(--space-1);
}

.person-card__role {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.person-card__dept {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ── NEWS CARD ── */

.news-card .card__date {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: var(--weight-regular);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

/* ── STAT CARD ── */

.stat-card {
  text-align: center;
  padding: var(--space-8) var(--space-6);
}

.stat-card__number {
  font-family: var(--font-mono);
  font-size: var(--text-5xl);
  font-weight: var(--weight-bold);
  color: var(--color-navy);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-card__suffix {
  font-size: var(--text-3xl);
  font-weight: var(--weight-bold);
  color: var(--color-red);
}

.section--dark .stat-card__suffix {
  color: var(--color-red-light);
}

.stat-card__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-regular);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

@media (max-width: 1024px) {
  .stat-card { padding: var(--space-6) var(--space-4); }
  .stat-card__number { font-size: var(--text-4xl); }
  .stat-card__suffix { font-size: var(--text-2xl); }
}

@media (max-width: 640px) {
  .stat-card { padding: var(--space-5) var(--space-3); }
  .stat-card__number { font-size: var(--text-3xl); }
}

/* ── PILLAR CARD ── */

.pillar-card {
  position: relative;
  display: block;
  padding: var(--space-8);
  padding-bottom: calc(var(--space-8) + 40px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: linear-gradient(135deg, var(--pillar-bg, #FFFFFF) 0%, #FFFFFF 100%);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  overflow: hidden;
}

.pillar-card:hover {
  border-color: var(--pillar-color, var(--color-border));
  box-shadow:
    var(--shadow-xl),
    0 0 20px -5px color-mix(in srgb, var(--pillar-color, transparent) 25%, transparent);
  transform: translateY(-4px);
  color: inherit;
}

.pillar-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}

.pillar-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background-color: var(--pillar-light, var(--gray-100));
  color: var(--pillar-color, var(--color-navy));
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-base);
}

.pillar-card:hover .pillar-card__icon {
  transform: scale(1.08);
}

.pillar-card__icon svg {
  width: 24px;
  height: 24px;
}

.pillar-card__icon img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.pillar-card__count-badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: var(--weight-medium);
  color: var(--pillar-color, var(--color-text-secondary));
  background-color: var(--pillar-light, var(--gray-100));
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.pillar-card__title {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-navy);
  margin-bottom: var(--space-3);
}

.pillar-card__description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.pillar-card__arrow {
  position: absolute;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background-color: var(--pillar-light, var(--gray-100));
  color: var(--pillar-color, var(--color-text-secondary));
  transition: all var(--transition-fast);
}

.pillar-card:hover .pillar-card__arrow {
  background-color: var(--pillar-color, var(--color-navy));
  color: var(--color-text-inverse);
  transform: translate(2px, -2px);
}

/* ── SPOTLIGHT STRIPS ── */

.spotlight .section__eyebrow {
  font-family: var(--font-mono);
  letter-spacing: var(--tracking-wider);
}

.spotlight__list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.spotlight__strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding: var(--space-8) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-base);
  position: relative;
}

.spotlight__strip:last-child {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.spotlight__strip:hover {
  padding-left: var(--space-6);
  background: rgba(255, 255, 255, 0.03);
}

.spotlight__strip-inner {
  flex: 1;
  min-width: 0;
}

.spotlight__meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.spotlight__pillar-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.spotlight__pillar-name {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: rgba(255, 255, 255, 0.5);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

.spotlight__project-name {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 2.25rem);
  font-weight: var(--weight-bold);
  color: #fff;
  line-height: 1.15;
  margin-bottom: var(--space-2);
  transition: color var(--transition-fast);
}

.spotlight__strip:hover .spotlight__project-name {
  color: var(--color-blue-light, #7DD3FC);
}

.spotlight__project-desc {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.5);
  line-height: var(--leading-relaxed);
  max-width: 640px;
  transition: color var(--transition-fast);
}

.spotlight__strip:hover .spotlight__project-desc {
  color: rgba(255, 255, 255, 0.7);
}

.spotlight__arrow {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.spotlight__strip:hover .spotlight__arrow {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.1);
  transform: translate(3px, -3px);
}

.spotlight__arrow svg {
  width: 18px;
  height: 18px;
}

@media (max-width: 768px) {
  .spotlight__strip {
    padding: var(--space-6) 0;
    flex-wrap: wrap;
  }

  .spotlight__strip:hover {
    padding-left: var(--space-3);
  }

  .spotlight__project-name {
    font-size: var(--text-xl);
  }

  .spotlight__arrow {
    width: 36px;
    height: 36px;
  }
}

/* ── FILTER BAR ── */

.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* Scroll fade hints */
.filter-bar-wrapper {
  position: relative;
}

.filter-bar-wrapper::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 40px;
  background: linear-gradient(to right, transparent, #FFFFFF);
  pointer-events: none;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.filter-bar-wrapper--scrollable::after {
  opacity: 1;
}

.filter-bar__btn {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  white-space: nowrap;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
}

.filter-bar__btn:hover {
  color: var(--color-navy);
  background-color: var(--gray-50);
}

.filter-bar__btn--active {
  color: var(--color-text-inverse);
  background-color: var(--color-navy);
  font-weight: var(--weight-semibold);
}

.filter-bar__btn--active:hover {
  color: var(--color-text-inverse);
  background-color: var(--color-navy-light);
}

/* Secondary filter bar (smaller, lighter) */
.filter-bar--secondary {
  background-color: var(--gray-50);
  border-color: var(--color-border-light);
}

.filter-bar--secondary .filter-bar__btn {
  font-size: var(--text-xs);
  padding: 6px var(--space-3);
}

.filter-bar--secondary .filter-bar__btn--active {
  background-color: var(--color-text-secondary);
}

/* ── Mobile tap targets (WCAG 2.1 — 44px minimum) ── */
@media (max-width: 768px) {
  .filter-bar__btn {
    padding: var(--space-3) var(--space-4);
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  .filter-bar--secondary .filter-bar__btn {
    min-height: 36px;
    padding: var(--space-2) var(--space-3);
  }
}

/* ── HERO ── */

.hero {
  position: relative;
  padding: var(--space-24) 0 var(--space-20);
  overflow: hidden;
  background:
    radial-gradient(ellipse at 70% 20%, rgba(0, 155, 222, 0.07) 0%, transparent 50%),
    radial-gradient(ellipse at 20% 80%, rgba(196, 30, 58, 0.05) 0%, transparent 50%),
    linear-gradient(180deg, var(--color-bg) 0%, #F0F4F8 100%);
}

.hero__canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.hero__grain {
  position: absolute;
  inset: -10%;
  z-index: 1;
  pointer-events: none;
  opacity: 0.04;
  mix-blend-mode: multiply;
  background-repeat: repeat;
  animation: grain-shift 6s steps(8) infinite;
}

.hero__content {
  position: relative;
  z-index: 3;
  max-width: 800px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background-color: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  backdrop-filter: blur(8px);
  letter-spacing: 0.02em;
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--color-red);
  animation: pulse-dot 2s ease infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.4; }
}

.hero__title {
  font-size: clamp(3.75rem, 5.5vw + 0.5rem, 6rem);
  font-weight: var(--weight-extrabold);
  color: var(--color-navy);
  line-height: 1.05;
  margin-bottom: var(--space-5);
  letter-spacing: -0.04em;
}

.hero__tagline {
  font-size: clamp(1.125rem, 1vw + 0.5rem, 1.375rem);
  color: var(--color-navy);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-8);
  max-width: 640px;
}

.hero__description {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-8);
  max-width: 580px;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* Hero gradient fade at bottom */
.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(to bottom, transparent, var(--color-bg));
  z-index: 2;
  pointer-events: none;
}

@media (max-width: 768px) {
  .hero {
    padding: var(--space-16) 0 var(--space-12);
  }

  .hero__title {
    font-size: clamp(2rem, 6.5vw, 3rem);
  }

  .hero__tagline,
  .hero__description {
    font-size: var(--text-base);
  }
}

@media (max-width: 480px) {
  .hero__title {
    font-size: var(--text-3xl);
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

/* ── PARTNERSHIP BANNER ── */

.partnership {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-12);
  flex-wrap: wrap;
}

.partnership__logo {
  height: 48px;
  width: auto;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
  filter: grayscale(30%);
}

.partnership__logo:hover {
  opacity: 1;
  filter: grayscale(0%);
}

.partnership__divider {
  width: 1px;
  height: 40px;
  background-color: var(--color-border);
}

@media (max-width: 640px) {
  .partnership {
    gap: var(--space-8);
  }

  .partnership__logo {
    height: 36px;
  }

  .partnership__divider {
    display: none;
  }
}