/* ─── Design Tokens & Theme Inherit ──────────────────────── */
:root {
  --bg-color: #000000;
  --panel-bg: #111111;
  --panel-border: rgba(201, 164, 76, 0.12);
  --panel-border-hover: rgba(201, 164, 76, 0.28);
  --text-primary: #F4F1E8;
  --text-secondary: #E8E4DA;
  --text-muted: #CFC9BC;
  --gold-accent: #C9A44C;
  --gold-glow: rgba(201, 164, 76, 0.25);
  
  --font-serif: 'Cinzel Decorative', serif;
  --font-sans: 'DM Sans', sans-serif;
  --font-tech: 'Space Grotesk', sans-serif;
}

/* ─── Base Styles ────────────────────────────────────────── */
html {
  scroll-behavior: smooth;
}
body {
  background: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  overflow-x: hidden;
}
.sk-main {
  margin-top: 0;
}
.sk-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 6rem) clamp(1.25rem, 4vw, 3rem);
}

/* ─── UI Typography & Eyebrow Elements ───────────────────── */
.sk-eyebrow {
  display: block;
  font-family: var(--font-tech);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--gold-accent);
  margin-bottom: 0.75rem;
}
.sk-sec-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 1.5rem 0;
  letter-spacing: -0.01em;
  line-height: 1.15;
}
.sk-hero__subtitle {
  font-family: var(--font-tech);
  font-size: clamp(0.85rem, 1.8vw, 1.2rem);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--gold-accent);
  margin-bottom: 1.5rem;
}
.sk-sec-lead {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 800px;
  margin-bottom: 3.5rem;
}
.sk-sec-lead.text-center {
  margin-left: auto;
  margin-right: auto;
}
.text-center {
  text-align: center;
}
.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* ─── Buttons ────────────────────────────────────────────── */
.sk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-tech);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.95rem 2.2rem;
  border-radius: 0;
  text-decoration: none;
  transition: all 300ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  cursor: pointer;
}
.sk-btn--primary {
  background: var(--gold-accent);
  color: #000;
  border: 1px solid var(--gold-accent);
}
.sk-btn--primary:hover {
  background: transparent;
  color: var(--gold-accent);
  box-shadow: 0 0 24px var(--gold-glow);
}
.sk-btn--secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--panel-border);
}
.sk-btn--secondary:hover {
  border-color: var(--gold-accent);
  color: var(--gold-accent);
  background: rgba(201, 164, 76, 0.04);
}

/* ─── Hero Section ───────────────────────────────────────── */
.sk-hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  padding-top: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--panel-border);
  background: radial-gradient(circle at 50% 50%, rgba(0, 0, 0,0.85) 0%, #000000 100%), url('/assets/images/hero_academics.png') no-repeat center/cover;
}

.sk-hero__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.sk-hero__overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 40%, rgba(0, 0, 0,0.38) 0%, rgba(0, 0, 0,0.80) 100%);
  z-index: 1;
}

.sk-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 880px;
  padding: 0 1.5rem;
}
.sk-hero-links {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ─── Sections ───────────────────────────────────────────── */
.sk-section {
  position: relative;
  background: var(--bg-color);
  border-top: 1px solid var(--panel-border);
}
.sk-section.alt-bg {
  background: #000000;
}

/* ─── Split Layout ───────────────────────────────────────── */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 4.5rem;
  align-items: center;
}

/* ─── Report Card Styling ────────────────────────────────── */
.report-card-chassis {
  background: var(--panel-bg);
  border: 8px double var(--panel-border);
  border-radius: 0;
  padding: 2.2rem;
  box-shadow: 0 20px 45px rgba(0,0,0,0.5);
  transition: border-color 300ms ease;
}
.report-card-chassis:hover {
  border-color: var(--panel-border-hover);
}
.report-card-header {
  text-align: center;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding-bottom: 1.5rem;
  margin-bottom: 1.8rem;
}
.cert-authority {
  font-family: var(--font-tech);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--gold-accent);
  display: block;
  margin-bottom: 0.5rem;
}
.report-card-header h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin: 0 0 0.35rem 0;
  color: var(--text-primary);
}
.cert-level {
  font-family: var(--font-tech);
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.report-card-body {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 1.8rem;
}
.report-card-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255,255,255,0.03);
  padding-bottom: 0.8rem;
}
.report-card-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.subject-info h4 {
  font-family: var(--font-tech);
  font-size: 0.95rem;
  margin: 0 0 0.2rem 0;
  color: var(--text-primary);
}
.syllabus-code {
  font-family: var(--font-tech);
  font-size: 0.7rem;
  color: var(--text-muted);
}
.subject-grade {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--gold-accent);
}

.report-card-footer {
  border-top: 1px dashed rgba(255,255,255,0.06);
  padding-top: 1.2rem;
}
.ledger-row {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-tech);
  font-size: 0.7rem;
  color: var(--text-muted);
}
.ledger-row strong {
  color: var(--text-secondary);
}

/* ─── Academic Standard Prose ────────────────────────────── */
.standard-bullets {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 2rem;
}
.bullet-item {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
  position: relative;
  padding-left: 1.5rem;
}
.bullet-item::before {
  content: '▪';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--gold-accent);
  font-size: 1.1rem;
}
.bullet-item strong {
  color: var(--text-primary);
}

/* ─── Learner Awards Grid ────────────────────────────────── */
.awards-section-glow {
  position: relative;
  overflow: hidden;
}
.awards-section-glow::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 70%;
  height: 70%;
  background: radial-gradient(circle, rgba(201, 164, 76, 0) 0%, rgba(201, 164, 76, 0) 70%);
  pointer-events: none;
  z-index: 0;
}
.awards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.2rem;
  margin-top: 3.5rem;
  position: relative;
  z-index: 1;
}
@keyframes cert-sheen {
  0% {
    transform: translateX(-150%) skewX(-25deg);
  }
  100% {
    transform: translateX(150%) skewX(-25deg);
  }
}
.award-card {
  background: radial-gradient(circle at 50% 50%, #161616 0%, #000000 100%);
  border: 8px double rgba(201, 164, 76, 0.2);
  border-radius: 0;
  padding: 2.5rem 2.2rem;
  position: relative;
  transition: transform 450ms cubic-bezier(0.25, 0.8, 0.25, 1),
              border-color 450ms cubic-bezier(0.25, 0.8, 0.25, 1),
              box-shadow 450ms cubic-bezier(0.25, 0.8, 0.25, 1);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), inset 0 0 30px rgba(0, 0, 0, 0.6);
  overflow: hidden;
}
.award-card:hover {
  transform: translateY(-8px);
  border-color: rgba(201, 164, 76, 0.65);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.7), 0 0 25px rgba(201, 164, 76, 0.12);
}
.award-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 200%;
  height: 100%;
  background: linear-gradient(to right, transparent 0%, rgba(201, 164, 76, 0) 30%, rgba(201, 164, 76, 0.15) 50%, rgba(201, 164, 76, 0) 70%, transparent 100%);
  transform: translateX(-150%) skewX(-25deg);
  pointer-events: none;
  z-index: 2;
}
.award-card:hover::after {
  animation: cert-sheen 850ms cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}
.cert-border-inner {
  position: absolute;
  inset: 6px;
  border: 1px solid rgba(201, 164, 76, 0.1);
  pointer-events: none;
  border-radius: 0;
}
.cert-border-inner::before {
  content: '';
  position: absolute;
  inset: 2px;
  border: 1px dashed rgba(201, 164, 76, 0.05);
  border-radius: 2px;
}
.cert-header {
  display: block;
  font-family: var(--font-tech);
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--gold-accent);
  margin-bottom: 0.75rem;
  position: relative;
  z-index: 1;
}
.cert-serial {
  font-family: var(--font-tech);
  font-size: 0.6rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  z-index: 1;
}
.award-card h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 0.8rem 0;
  color: var(--text-primary);
  line-height: 1.35;
  position: relative;
  z-index: 1;
}
.cert-divider {
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(201, 164, 76, 0.25) 15%, rgba(201, 164, 76, 0.25) 85%, transparent);
  margin: 1.2rem 0;
  position: relative;
  z-index: 1;
}
.cert-divider::after {
  content: '♦';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  color: var(--gold-accent);
  font-size: 0.55rem;
  background: #111;
  padding: 0 0.5rem;
}
.award-card p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0 0 1.5rem 0;
  position: relative;
  z-index: 1;
}
.cert-footer {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-top: 1px solid rgba(201, 164, 76, 0.08);
  padding-top: 1.2rem;
  position: relative;
  z-index: 1;
}
.cert-meta {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.cert-label {
  font-family: var(--font-tech);
  font-size: 0.55rem;
  font-weight: 600;
  color: #CFC9BC;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.cert-value {
  font-family: var(--font-tech);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}
.cert-signature {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
}
.cert-sig-line {
  width: 70px;
  height: 1px;
  background: rgba(201, 164, 76, 0.25);
  margin-bottom: 0.1rem;
}
.cert-sig-text {
  font-family: 'Cinzel Decorative', serif;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--gold-accent);
  letter-spacing: 0.05em;
}
.cert-sig-title {
  font-family: var(--font-tech);
  font-size: 0.55rem;
  color: #CFC9BC;
  text-transform: uppercase;
}
.cert-seal-wrap {
  position: relative;
  width: 45px;
  height: 45px;
  margin-bottom: -5px;
}
.cert-seal-svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 2px 5px rgba(0, 0, 0, 0.15));
  transition: transform 600ms cubic-bezier(0.25, 0.8, 0.25, 1);
}
.award-card:hover .cert-seal-svg {
  transform: rotate(20deg) scale(1.05);
}

/* ─── Syllabus Accordions Section ────────────────────────── */
.syllabus-section {
  position: relative;
  background: var(--bg-color);
  border-top: 1px solid var(--panel-border);
}
.syllabus-tabs {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  position: relative;
  z-index: 1;
  flex-wrap: wrap;
}
.syllabus-tab-btn {
  background: rgba(17, 17, 17, 0.4);
  border: 1px solid rgba(201, 164, 76, 0.15);
  color: var(--text-muted);
  font-family: var(--font-tech);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.8rem 2rem;
  cursor: pointer;
  border-radius: 0;
  position: relative;
  transition: all 300ms ease;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.syllabus-tab-btn .tab-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: all 300ms ease;
}
.syllabus-tab-btn:hover {
  color: var(--text-secondary);
  border-color: rgba(201, 164, 76, 0.35);
  background: rgba(17, 17, 17, 0.7);
}
.syllabus-tab-btn.active {
  color: var(--gold-accent);
  border-color: var(--gold-accent);
  background: rgba(201, 164, 76, 0.04);
  box-shadow: 0 0 15px rgba(201, 164, 76, 0.06);
}
.syllabus-tab-btn.active .tab-indicator {
  background: var(--gold-accent);
  box-shadow: 0 0 8px var(--gold-accent);
}
.syllabus-panel {
  display: none;
  width: 100%;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.syllabus-panel.active {
  display: block;
}
.subject-desc-wrap {
  margin-bottom: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.subject-description {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
  text-align: justify;
}
.subject-link-wrap {
  display: flex;
  justify-content: flex-start;
}
.accordion-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  align-items: start;
}
.accordion-item {
  background: rgba(17, 17, 17, 0.5);
  border: 1px solid rgba(201, 164, 76, 0.12);
  border-radius: 0;
  overflow: hidden;
  transition: all 300ms cubic-bezier(0.25, 0.8, 0.25, 1);
  position: relative;
}
.accordion-item:hover {
  border-color: rgba(201, 164, 76, 0.35);
  background: rgba(21, 21, 21, 0.75);
  box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}
.accordion-item.open {
  border-color: rgba(201, 164, 76, 0.5);
  background: rgba(21, 21, 21, 0.9);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5), inset 0 0 15px rgba(201,164,76,0.02);
}
.accordion-header {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.4rem 1.8rem;
  text-align: left;
}
.header-main h3 {
  font-family: var(--font-tech);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 0.25rem 0;
  transition: color 250ms ease;
}
.accordion-item:hover .header-main h3 {
  color: #fff;
}
.accordion-item.open .header-main h3 {
  color: var(--gold-accent);
}
.header-meta {
  font-family: var(--font-tech);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}
.header-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.accordion-item .grade-badge {
  font-family: var(--font-serif);
  font-size: 0.75rem;
  font-weight: 700;
  color: #000;
  background: var(--gold-accent);
  padding: 0.2rem 0.55rem;
  border-radius: 0;
  transition: transform 300ms ease;
}
.accordion-item .grade-badge.star {
  text-shadow: none;
}
.accordion-item:hover .grade-badge {
  transform: scale(1.05);
}
.accordion-trigger-icon {
  width: 14px;
  height: 14px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.accordion-trigger-icon span {
  position: absolute;
  background: rgba(201, 164, 76, 0.65);
  transition: all 300ms cubic-bezier(0.25, 0.8, 0.25, 1);
}
.accordion-trigger-icon .line-h {
  width: 100%;
  height: 2px;
}
.accordion-trigger-icon .line-v {
  width: 2px;
  height: 100%;
}
.accordion-item.open .accordion-trigger-icon .line-v {
  transform: rotate(90deg) scaleY(0);
}
.accordion-item.open .accordion-trigger-icon span {
  background: var(--gold-accent);
}
.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 350ms cubic-bezier(0.25, 0.8, 0.25, 1);
}
.accordion-content-inner {
  padding: 0 1.8rem 1.6rem 1.8rem;
  border-top: 1px solid rgba(255,255,255,0.02);
  padding-top: 1.2rem;
}
.accordion-content-inner p {
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--text-secondary);
  margin: 0;
  text-align: justify;
}

@media (min-width: 769px) {
  .accordion-item:last-child:nth-child(odd) {
    grid-column: span 2;
  }
}
@media (max-width: 768px) {
  .accordion-group {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}
.sk-link-arrow {
  font-family: var(--font-tech);
  font-size: 0.75rem;
  color: var(--gold-accent);
  text-decoration: none;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color 200ms ease;
}
.sk-link-arrow:hover {
  color: var(--text-primary);
}

/* ─── Certificates Grid ──────────────────────────────────── */
.certificates-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.8rem;
  margin-top: 2rem;
}
.cert-card {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 0;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
  box-shadow: 0 10px 25px rgba(0,0,0,0.2);
  transition: all 300ms ease;
}
.cert-card:hover {
  border-color: var(--gold-accent);
  box-shadow: 0 15px 35px rgba(0,0,0,0.4);
}
.cert-badge {
  font-family: var(--font-serif);
  font-size: 0.8rem;
  font-weight: 700;
  color: #000;
  background: var(--gold-accent);
  padding: 0.2rem 0.6rem;
  border-radius: 0;
}
.cert-card h3 {
  font-family: var(--font-tech);
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0;
  color: var(--text-primary);
}
.cert-card p {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin: 0 0 auto 0;
}
.cert-card .sk-btn {
  width: 100%;
  padding: 0.65rem 0;
  font-size: 0.7rem;
}

/* ─── Responsive Media Queries ──────────────────────────── */
@media (max-width: 980px) {
  .split-layout {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }
  .awards-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.8rem;
  }
  .discipline-breakdowns {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .certificates-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

@media (max-width: 600px) {
  .awards-grid {
    grid-template-columns: 1fr;
  }
  .certificates-grid {
    grid-template-columns: 1fr;
  }
}

/* subtle percentile note */
.sk-percentile-note {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #CFC9BC;
  margin: -1.75rem 0 2.5rem;
}

/* ─── Gallery Accordion System ───────────────────────────── */
.sk-gallery-strip {
  padding: 0;
  background: #000;
  width: 100%;
  overflow: hidden;
  border-top: 1px solid var(--panel-border);
  border-bottom: 1px solid var(--panel-border);
}

.gallery-accordion {
  display: flex;
  width: 100%;
  height: 380px;
  background: #000;
}

.gallery-card {
  flex: 1;
  position: relative;
  overflow: hidden;
  transition: flex 0.8s cubic-bezier(0.25, 1, 0.5, 1);
  cursor: pointer;
  border-right: 1px solid var(--panel-border);
}

.gallery-card:last-child {
  border-right: none;
}

.gallery-card img {
  height: 100%;
  width: 100%;
  object-fit: cover;
  transition: transform 1s cubic-bezier(0.25, 1, 0.5, 1);
}

.overlay-text {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 1.6rem 1.4rem;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.3) 50%, transparent 100%);
  opacity: 1;
  transform: none;
  transition: padding 0.5s cubic-bezier(0.25, 1, 0.5, 1), background 0.5s cubic-bezier(0.25, 1, 0.5, 1);
  pointer-events: none;
}

.overlay-text h3 {
  font-family: var(--font-tech);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.9), 0 4px 12px rgba(0, 0, 0, 0.95);
  transition: all 0.5s cubic-bezier(0.25, 1, 0.5, 1);
}

.overlay-text p {
  font-family: var(--font-sans);
  color: var(--gold-accent);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin: 0;
  opacity: 0;
  max-height: 0;
  transform: translateY(15px);
  overflow: hidden;
  transition: opacity 0.4s cubic-bezier(0.25, 1, 0.5, 1), 
              max-height 0.4s cubic-bezier(0.25, 1, 0.5, 1), 
              transform 0.4s cubic-bezier(0.25, 1, 0.5, 1),
              margin 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

/* Desktop Hover Interactions (Screens wider than 768px) */
@media (min-width: 769px) {
  .gallery-card:hover {
    flex: 2.5;
  }
  
  .gallery-card:hover img {
    transform: scale(1.04);
  }
  
  .gallery-card:hover .overlay-text {
    padding: 2.4rem 1.8rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.98) 0%, rgba(0, 0, 0, 0.6) 70%, transparent 100%);
  }

  .gallery-card:hover .overlay-text h3 {
    font-size: 1.35rem;
    margin-bottom: 0.4rem;
  }

  .gallery-card:hover .overlay-text p {
    opacity: 1;
    max-height: 50px;
    transform: translateY(0);
    margin-top: 0.2rem !important;
  }
}

/* Mobile Stacking Configuration (Screens <= 768px) */
@media (max-width: 768px) {
  .gallery-accordion {
    flex-direction: column;
    height: auto;
  }
  .gallery-card {
    flex: none;
    width: 100%;
    height: 320px;
    border-right: none;
    border-bottom: 1px solid var(--panel-border);
  }
  .gallery-card:last-child {
    border-bottom: none;
  }
  .overlay-text {
    opacity: 1 !important;
    transform: none !important;
    padding: 1.5rem !important;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.98) 0%, rgba(0, 0, 0, 0.7) 80%, transparent 100%) !important;
  }
  .overlay-text h3 {
    font-size: 1.25rem !important;
    margin-bottom: 0.4rem !important;
  }
  .overlay-text p {
    opacity: 1 !important;
    max-height: none !important;
    transform: none !important;
    margin: revert !important;
  }
}


/* ════════════════════════════════════════════════════════════════════════
   THE SYLLABUS, RUNNING: one live instrument per subject
   ════════════════════════════════════════════════════════════════════════ */
.inst { background: #000; border-top: 1px solid rgba(201, 164, 76, 0.22); }
.inst__inner { max-width: 1480px; margin: 0 auto; padding: clamp(5rem, 10vw, 8rem) clamp(1.25rem, 4vw, 3rem); }
.inst__head { display: flex; align-items: flex-end; justify-content: space-between; gap: 2rem; flex-wrap: wrap; margin-bottom: clamp(2rem, 4vw, 3rem); }
.inst__head .sk-sec-title { margin: 0.9rem 0 0; }
.inst__lead { max-width: 520px; margin: 0; font-size: 1.06rem; line-height: 1.7; color: var(--text-primary); }
.inst__tabs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border: 1px solid rgba(201, 164, 76, 0.45); border-bottom: 0; }
.inst-tab { position: relative; display: flex; flex-direction: column; justify-content: flex-start; padding: 1.15rem 1.25rem 1.3rem; text-align: left; background: #030303; border: 0; border-right: 1px solid rgba(201, 164, 76, 0.25); color: #FAF8F2; cursor: pointer; transition: background 250ms; }
.inst-tab:last-child { border-right: 0; }
.inst-tab::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: #E0BE67; transform: scaleX(0); transform-origin: 0 50%; transition: transform 450ms cubic-bezier(0.22, 1, 0.36, 1); }
.inst-tab:hover, .inst-tab:focus-visible { background: #0b0b0b; outline: none; }
.inst-tab.is-active { background: #0b0b0b; }
.inst-tab.is-active::after { transform: scaleX(1); }
.inst-tab__sub { display: block; margin-bottom: 0.45rem; font: 600 0.6rem/1.3 var(--font-tech); letter-spacing: 0.18em; text-transform: uppercase; color: #E0BE67; }
.inst-tab__q { display: block; font: 600 1rem/1.35 var(--font-sans); color: #FAF8F2; }
.inst__body { display: grid; border: 1px solid rgba(201, 164, 76, 0.45); background: #030303; }
.inst-view { grid-area: 1 / 1; display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(320px, 1fr); visibility: hidden; opacity: 0; transition: opacity 350ms ease, visibility 0s linear 350ms; }
.inst-view.is-active { visibility: visible; opacity: 1; transition-delay: 0s; }
.inst-stage { position: relative; min-height: clamp(420px, 46vw, 640px); background: #000; border-right: 1px solid rgba(201, 164, 76, 0.25); overflow: hidden; }
.inst-stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; touch-action: pan-y; }
.inst-canvas--click { cursor: crosshair; }
#inst-path { cursor: cell; }
.inst-hint { position: absolute; right: 0.8rem; bottom: 0.8rem; padding: 0.4rem 0.6rem; background: #000; border: 1px solid rgba(201, 164, 76, 0.5); font: 600 0.58rem/1.2 var(--font-tech); letter-spacing: 0.14em; text-transform: uppercase; color: #FAF8F2; pointer-events: none; }
#inst-atom + .inst-hint { top: 0.8rem; bottom: auto; }
.inst-hint--math { text-transform: none; font-size: 0.8rem; letter-spacing: 0.04em; }
.inst-side { padding: clamp(1.3rem, 2.4vw, 2rem); display: flex; flex-direction: column; gap: 1.1rem; min-width: 0; }
.inst-idea { margin: 0; font-size: 1.02rem; line-height: 1.65; color: #FAF8F2; }
.inst-note { margin: 0; font-size: 0.92rem; line-height: 1.55; color: #F4F1E8; }
.inst-ctl { display: grid; gap: 0.5rem; font: 600 0.66rem/1.3 var(--font-tech); letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-primary); }
.inst-ctl span { display: flex; justify-content: space-between; gap: 1rem; }
.inst-ctl b { color: #E0BE67; font-size: 0.9rem; letter-spacing: 0.02em; }
.inst-ctl input[type="range"] { -webkit-appearance: none; appearance: none; width: 100%; height: 2px; margin: 0.55rem 0; background: rgba(224, 190, 103, 0.55); outline: none; cursor: pointer; }
.inst-ctl input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 22px; background: #E0BE67; border: 0; cursor: grab; }
.inst-ctl input[type="range"]::-moz-range-thumb { width: 16px; height: 22px; background: #E0BE67; border: 0; border-radius: 0; cursor: grab; }
.inst-ctl input[type="range"]:focus-visible { outline: 1px solid #F4E2AE; outline-offset: 6px; }
.inst-reads { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem 1.2rem; padding: 1rem 0; border-top: 1px solid rgba(201, 164, 76, 0.25); border-bottom: 1px solid rgba(201, 164, 76, 0.25); }
.inst-reads b { display: block; font: 700 1.5rem/1.1 var(--font-tech); letter-spacing: -0.01em; color: #FAF8F2; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.inst-reads b.is-gold { color: #E0BE67; }
.inst-reads span { display: block; margin-top: 0.35rem; font: 600 0.58rem/1.35 var(--font-tech); letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-primary); }
.inst-actions, .inst-presets { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.inst-btn { padding: 0.72rem 0.95rem; background: var(--gold-accent); border: 1px solid var(--gold-accent); color: #000; font: 700 0.64rem/1 var(--font-tech); letter-spacing: 0.1em; cursor: pointer; transition: background 220ms, color 220ms; }
.inst-btn:hover, .inst-btn:focus-visible { background: #E0BE67; color: #000; outline: none; }
.inst-btn--ghost { background: transparent; color: #FAF8F2; border-color: rgba(224, 190, 103, 0.6); }
.inst-sol { padding: 0.8rem 0.95rem; border: 1px solid #E0BE67; }
.inst-sol span { display: block; font: 600 0.58rem/1 var(--font-tech); letter-spacing: 0.18em; text-transform: uppercase; color: #E0BE67; }
.inst-sol b { display: block; margin-top: 0.5rem; font: 700 1.3rem/1.2 var(--font-tech); color: #FAF8F2; }
.inst-chal { padding: 0.8rem 0.95rem; border: 1px solid rgba(201, 164, 76, 0.55); transition: background 350ms, border-color 350ms; }
.inst-chal__k { font: 700 0.58rem/1 var(--font-tech); letter-spacing: 0.2em; text-transform: uppercase; color: #E0BE67; }
.inst-chal__k i { font-style: normal; }
.inst-chal p { margin: 0.4rem 0 0; font-size: 0.96rem; line-height: 1.5; color: #FAF8F2; }
.inst-chal.is-solved { background: #E0BE67; border-color: #E0BE67; }
.inst-chal.is-solved .inst-chal__k, .inst-chal.is-solved p { color: #000; }

@media (max-width: 1040px) {
  .inst-view { grid-template-columns: minmax(0, 1fr); }
  .inst-stage { border-right: 0; border-bottom: 1px solid rgba(201, 164, 76, 0.25); min-height: 440px; }
  .inst__tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .inst-tab:nth-child(2) { border-right: 0; }
  .inst-tab:nth-child(-n+2) { border-bottom: 1px solid rgba(201, 164, 76, 0.25); }
}
@media (max-width: 640px) {
  .inst-stage { min-height: 460px; }
  .inst-tab { padding: 0.9rem 0.9rem 1rem; }
  .inst-tab__q { font-size: 0.88rem; }
}

.sk-cert-request { display: inline-block; margin: 0.25rem 0 1.5rem; }

/* Subject descriptions on phones: a short preview, then Read more. */
.subject-more { display: none; }
@media (max-width: 768px) {
  .subject-desc-wrap { gap: 0.25rem; margin-bottom: 1.75rem; }
  .subject-description { text-align: left; }
  .subject-desc-wrap.has-more .subject-description {
    --full: 60rem;
    max-height: calc(4 * 1.7em);
    overflow: hidden;
    -webkit-mask-image: linear-gradient(to bottom, #000 50%, transparent 100%);
    mask-image: linear-gradient(to bottom, #000 50%, transparent 100%);
    transition: max-height 420ms cubic-bezier(0.22, 1, 0.36, 1);
  }
  .subject-desc-wrap.has-more.is-open .subject-description {
    max-height: var(--full);
    -webkit-mask-image: none;
    mask-image: none;
  }
  .subject-more {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    min-height: 44px;
    padding: 0;
    border: 0;
    background: transparent;
    color: #C9A44C;
    font-family: var(--font-sans, 'DM Sans', sans-serif);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
  }
  .subject-more:focus-visible { outline: 2px solid #F4F1E8; outline-offset: 3px; }
}
@media (max-width: 768px) and (prefers-reduced-motion: reduce) {
  .subject-desc-wrap.has-more .subject-description { transition: none; }
}