/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--section-pad-y) var(--section-pad-x);
  overflow: hidden;
  background: var(--bg-deep);
}

.hero-bg-image {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}
.hero-bg-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
  transform: scale(1.05);
  animation: hero-zoom 14s ease-out forwards;
  filter: saturate(0.7) brightness(0.85);
}
@keyframes hero-zoom {
  from { transform: scale(1.1); }
  to   { transform: scale(1); }
}

/* CSS orbs layered on top of photo for cinematic depth */
.hero-bg-fallback {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
  pointer-events: none;
  mix-blend-mode: screen;
  opacity: 0.6;
}
.hero-bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.45;
}
.hero-bg-orb-1 {
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, var(--accent-cyan) 0%, transparent 70%);
  top: -20vw;
  inset-inline-end: -10vw;
  animation: orb-drift-1 25s ease-in-out infinite alternate;
}
.hero-bg-orb-2 {
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, var(--plant-emerald) 0%, transparent 70%);
  bottom: -15vw;
  inset-inline-start: -10vw;
  opacity: 0.25;
  animation: orb-drift-2 30s ease-in-out infinite alternate;
}
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}
@keyframes orb-drift-1 {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(-5vw, 5vw) scale(1.1); }
}
@keyframes orb-drift-2 {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(5vw, -3vw) scale(0.95); }
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,18,48,0.45) 0%, rgba(10,18,48,0.92) 100%);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}
.hero-meta {
  color: var(--accent-cyan);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  margin-bottom: 2rem;
}
.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 900;
  line-height: 1.05;
  margin: 0 0 2rem;
}
.hero-title-en {
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.hero-author {
  margin: 2.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
}
.hero-author-line {
  font-size: 1.25rem;
}
.hero-label {
  color: var(--text-tertiary);
  font-size: 0.875rem;
  margin-inline-end: 0.5rem;
}
.hero-year {
  color: var(--text-secondary);
  font-style: italic;
}
.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 3rem;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1.125rem;
  text-decoration: none;
  transition: transform 200ms ease, background 200ms ease, color 200ms ease, box-shadow 200ms ease;
}
.btn-primary {
  background: var(--accent-cyan);
  color: var(--bg-deep);
}
.btn-primary:hover {
  background: var(--accent-cyan-d);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,212,255,0.3);
}
.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--accent-cyan);
}
.btn-secondary:hover {
  background: rgba(0,212,255,0.1);
  transform: translateY(-2px);
}

/* ============================================================
   STICKY CTA + LANG TOGGLE
   ============================================================ */
.sticky-cta {
  position: fixed;
  bottom: 1.5rem;
  inset-inline-end: 1.5rem;
  background: var(--accent-cyan);
  color: var(--bg-deep);
  padding: 0.75rem 1.25rem;
  border-radius: 9999px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(0,212,255,0.3);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 300ms ease, transform 300ms ease, background 200ms ease;
  z-index: 100;
  pointer-events: none;
}
.sticky-cta.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.sticky-cta:hover {
  background: var(--accent-cyan-d);
}

.lang-toggle {
  position: fixed;
  top: 1.5rem;
  inset-inline-end: 1.5rem;
  background: rgba(19,26,61,0.85);
  backdrop-filter: blur(10px);
  color: var(--text-primary);
  border: 1px solid var(--border-soft);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  z-index: 100;
  transition: background 200ms ease, border-color 200ms ease;
}
.lang-toggle:hover {
  background: var(--bg-surface-hi);
  border-color: var(--accent-cyan);
}

/* ============================================================
   SECTIONS (shared)
   ============================================================ */
.section {
  padding: var(--section-pad-y) var(--section-pad-x);
  position: relative;
}
.section-container {
  max-width: var(--container-max);
  margin: 0 auto;
}
.section-heading {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 3rem;
  text-align: center;
}

/* ============================================================
   ABSTRACT
   ============================================================ */
.section-abstract {
  background: var(--bg-surface);
}
.abstract-body {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.25rem;
  line-height: 1.85;
  color: var(--text-secondary);
}
.abstract-body p {
  margin: 0;
}

html[dir="ltr"] .abstract-body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 1.125rem;
}

/* ============================================================
   SECTION HEADER (label + heading + subheading)
   ============================================================ */
.section-header { text-align: center; margin-bottom: 4rem; }
.section-label {
  display: inline-block;
  color: var(--accent-cyan);
  font-size: 0.875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.section-subheading {
  color: var(--text-secondary);
  font-size: 1.25rem;
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  line-height: 1.6;
}

/* ============================================================
   REVEAL (fade-up on scroll)
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 700ms ease, transform 700ms ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ============================================================
   BACKGROUND SECTION
   ============================================================ */
.section-background { background: var(--bg-deep); }

.background-intro {
  max-width: 800px;
  margin: 0 auto 4rem;
  font-size: 1.25rem;
  line-height: 1.85;
  color: var(--text-secondary);
  text-align: center;
}

.background-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 4rem;
}
.background-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  padding: 2rem;
}
.background-card:hover { border-color: var(--accent-cyan); }
.background-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  line-height: 1;
}
.background-card h3 {
  font-size: 1.5rem;
  margin: 0 0 1rem;
  color: var(--text-primary);
}
.background-card p {
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.7;
}

.background-objectives {
  background: var(--bg-surface);
  border-inline-start: 4px solid var(--accent-cyan);
  padding: 2rem;
  border-radius: 8px;
}
.background-objectives h3 {
  margin: 0 0 1rem;
  color: var(--accent-cyan);
  font-size: 1.5rem;
}
.background-objectives ol {
  margin: 0;
  padding-inline-start: 1.5rem;
  color: var(--text-secondary);
  line-height: 1.85;
  font-size: 1.0625rem;
}
.background-objectives li { margin-bottom: 0.5rem; }

/* ============================================================
   PLANTS SECTION (the hero section visually)
   ============================================================ */
.section-plants {
  background: linear-gradient(180deg, var(--bg-deep) 0%, #131a3d 100%);
}

.plants-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.plant-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-soft);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 300ms ease, box-shadow 300ms ease, border-color 300ms ease;
  display: flex;
  flex-direction: column;
}
.plant-card:hover {
  transform: translateY(-4px);
  border-color: var(--plant-emerald);
  box-shadow: 0 16px 40px rgba(16,185,129,0.18);
}
.plant-card-image {
  display: block;
  aspect-ratio: 3/2;
  overflow: hidden;
  background: #0a1230;
}
.plant-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.plant-card-image.is-structure img {
  object-fit: contain;
  padding: 1.5rem;
  background: linear-gradient(135deg, #131a3d 0%, #0a1230 100%);
}
.plant-card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.plant-card-scientific {
  color: var(--accent-cyan);
  font-style: italic;
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}
.plant-card-name {
  font-size: 1.5rem;
  font-weight: 800;
  margin: 0 0 0.75rem;
  color: var(--text-primary);
}
.plant-card-compound {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-soft);
}
.plant-card-compound strong {
  color: var(--plant-emerald);
  font-weight: 700;
}
.plant-card-mechanism {
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
  font-size: 0.95rem;
}

.plants-syrian-divider {
  margin: 5rem 0 2rem;
  text-align: center;
}
.plants-syrian-divider h3 {
  display: inline-block;
  font-size: 1.5rem;
  font-weight: 700;
  padding: 0.75rem 2rem;
  border: 1.5px solid var(--plant-emerald);
  border-radius: 9999px;
  color: var(--plant-emerald);
  margin: 0;
}

/* ============================================================
   METHODOLOGY SECTION
   ============================================================ */
.section-methodology { background: var(--bg-deep); }
.methodology-content {
  max-width: 900px;
  margin: 0 auto;
  font-size: 1.125rem;
  line-height: 1.85;
  color: var(--text-secondary);
}
.methodology-content h3 {
  color: var(--accent-cyan);
  margin: 2.5rem 0 1rem;
  font-size: 1.5rem;
}
.methodology-content ul {
  padding-inline-start: 1.5rem;
}
.methodology-content li { margin-bottom: 0.5rem; }

.assays-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}
.assay-card {
  background: var(--bg-surface);
  border-inline-start: 3px solid var(--accent-cyan);
  padding: 1rem 1.25rem;
  border-radius: 0 8px 8px 0;
}
.assay-name {
  color: var(--accent-cyan);
  font-weight: 700;
  font-family: 'Inter', monospace;
  margin-bottom: 0.25rem;
}
.assay-purpose {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.db-pills { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.db-pill {
  background: var(--bg-surface-hi);
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
  padding: 0.5rem 1.25rem;
  border-radius: 9999px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
}

/* ============================================================
   FINDINGS SECTION
   ============================================================ */
.section-findings { background: var(--bg-surface); }
.findings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.5rem;
  text-align: center;
  max-width: 1100px;
  margin: 0 auto;
}
.finding-card {
  padding: 2.5rem 1rem;
  background: var(--bg-deep);
  border-radius: 16px;
  border: 1px solid var(--border-soft);
  transition: border-color 300ms ease, transform 300ms ease;
}
.finding-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
}
.finding-value {
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 900;
  color: var(--accent-cyan);
  line-height: 1;
  margin-bottom: 0.5rem;
  font-family: 'Inter', sans-serif;
}
.finding-label {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.4;
}

.pathways {
  margin-top: 4rem;
  text-align: center;
}
.pathways h3 {
  color: var(--accent-cyan);
  font-size: 1.25rem;
  margin: 0 0 1.5rem;
}
.pathway-pills {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}
.pathway-pill {
  background: var(--bg-deep);
  border: 1px solid var(--plant-emerald);
  color: var(--plant-emerald);
  padding: 0.5rem 1.25rem;
  border-radius: 9999px;
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
}

/* ============================================================
   CONCLUSION SECTION
   ============================================================ */
.section-conclusion { background: var(--bg-deep); }
.conclusion-main {
  max-width: 800px;
  margin: 0 auto 3rem;
  font-size: 1.25rem;
  line-height: 1.85;
  color: var(--text-secondary);
  text-align: center;
}
.conclusion-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  max-width: 1100px;
  margin: 0 auto;
}
@media (min-width: 768px) {
  .conclusion-cols { grid-template-columns: 1fr 1fr; }
}
.conclusion-cols h3 {
  color: var(--accent-cyan);
  font-size: 1.5rem;
  margin: 0 0 1rem;
}
.conclusion-cols ul {
  padding-inline-start: 1.5rem;
  color: var(--text-secondary);
  line-height: 1.8;
}
.conclusion-cols li { margin-bottom: 0.5rem; }
.conclusion-cols p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin: 0;
}

.references {
  max-width: 900px;
  margin: 4rem auto 0;
  background: var(--bg-surface);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  padding: 1rem 1.5rem;
}
.references summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--accent-cyan);
  font-size: 1.125rem;
  padding: 0.5rem 0;
}
.references[open] summary { margin-bottom: 1rem; }
.references ol {
  padding-inline-start: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0;
}
.references li { margin-bottom: 0.75rem; }
.references em {
  color: var(--text-primary);
  font-style: italic;
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */
.section-about { background: var(--bg-surface); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  max-width: 1100px;
  margin: 0 auto;
}
@media (min-width: 768px) {
  .about-grid { grid-template-columns: 1fr 1fr; }
}
.about-bio p {
  color: var(--text-secondary);
  line-height: 1.85;
  margin: 0 0 1rem;
  font-size: 1.0625rem;
}
.about-downloads h3 {
  color: var(--accent-cyan);
  margin: 0 0 1rem;
  font-size: 1.5rem;
}
.downloads-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}
.download-btn {
  display: flex;
  flex-direction: column;
  padding: 1rem 1.25rem;
  background: var(--bg-deep);
  border: 1px solid var(--accent-cyan);
  border-radius: 8px;
  color: var(--text-primary);
  text-decoration: none;
  transition: background 200ms ease, transform 200ms ease;
}
.download-btn:hover {
  background: var(--bg-surface-hi);
  transform: translateY(-2px);
}
.dl-label { font-weight: 600; font-size: 0.95rem; }
.dl-size {
  color: var(--text-tertiary);
  font-size: 0.8rem;
  margin-top: 0.25rem;
  font-family: 'Inter', sans-serif;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  padding: 3rem var(--section-pad-x) 2rem;
  background: var(--bg-deep);
  text-align: center;
  border-top: 1px solid var(--border-soft);
}
.footer-univ {
  color: var(--text-secondary);
  font-weight: 600;
  margin: 0 0 0.25rem;
}
.footer-year {
  color: var(--text-tertiary);
  font-size: 0.95rem;
  margin: 0 0 1rem;
}
.footer-credit {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-tertiary);
}
.footer-credit a { color: var(--accent-cyan); text-decoration: none; }
.footer-credit a:hover { text-decoration: underline; }