/* ============================================================
   CASTLE Conference 6.0 — style.css
   Clean Modern Light Theme
   Optimized & Cleaned Version
   ============================================================ */

/* ─────────────────────────────────────────────────────────
   DESIGN TOKENS (CSS Variables)
   ───────────────────────────────────────────────────────── */
:root {
  /* Colors */
  --clr-bg-primary: #ffffff;
  --clr-bg-secondary: #E6D8B8;
  --clr-bg-card: #ffffff;

  --clr-text-primary: #222222;
  --clr-text-secondary: #6B7280;
  --clr-text-muted: #9CA3AF;

  --clr-border: rgba(0, 0, 0, 0.08);

  /* Brand Palette */
  --clr-primary: #1F4EA3;
  --clr-secondary: #6C7BD9;
  --clr-accent: #F28C28;
  --clr-accent-light: #F2C66D;

  /* Gradients */
  --gradient-brand: linear-gradient(135deg, #1F4EA3, #6C7BD9);
  --gradient-accent: linear-gradient(90deg, #F28C28, #F2C66D);

  /* Typography */
  --font-base: 'Inter', system-ui, sans-serif;
  --fs-base: clamp(0.98rem, 0.98rem + 0.14vw, 1.03rem);
  --fs-xs: clamp(0.72rem, 0.75rem + 0.05vw, 0.8rem);
  --fs-sm: clamp(0.86rem, 0.9rem + 0.04vw, 0.95rem);
  --fs-md: clamp(1rem, 1rem + 0.08vw, 1.08rem);
  --fs-lg: clamp(1.1rem, 1.2rem + 0.15vw, 1.25rem);
  --fs-xl: clamp(1.3rem, 1.35rem + 0.2vw, 1.45rem);
  --fs-2xl: clamp(1.45rem, 1.5rem + 0.3vw, 1.65rem);
  --fs-3xl: clamp(1.95rem, 2.1rem + 0.5vw, 2.4rem);
  --fs-4xl: clamp(2.35rem, 2.6rem + 0.8vw, 2.95rem);
  --fs-5xl: clamp(3rem, 3.35rem + 1vw, 3.8rem);

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-fluid-xs: clamp(0.5rem, 0.75vw, 0.8rem);
  --space-fluid-sm: clamp(0.8rem, 1.1vw, 1.1rem);
  --space-fluid-md: clamp(1.1rem, 1.45vw, 1.4rem);
  --space-fluid-lg: clamp(1.6rem, 2.2vw, 2.4rem);
  --space-fluid-xl: clamp(2.2rem, 3vw, 3.4rem);
  --space-fluid-2xl: clamp(3rem, 4vw, 4.8rem);

  /* Layout */
  --container-max: 1280px;
  --container-pad: 1.5rem;

  /* Borders & Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 160ms ease;
  --transition-base: 260ms ease;

  /* Shadows */
  --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 10px 28px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 18px 42px rgba(15, 23, 42, 0.1);
}

/* ─────────────────────────────────────────────────────────
   GLOBAL STYLES
   ───────────────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  font-family: var(--font-base);
  font-size: var(--fs-md);
  color: var(--clr-text-primary);
  background:
    radial-gradient(circle at 8% 0%, rgba(31, 78, 163, 0.08) 0%, transparent 34%),
    radial-gradient(circle at 95% 10%, rgba(242, 140, 40, 0.06) 0%, transparent 30%),
    var(--clr-bg-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
}

a {
  text-decoration: none;
  color: inherit;
}

[data-id][data-en] {
  transition: opacity var(--transition-fast);
}

body.is-language-switching [data-id][data-en]:not(meta) {
  opacity: 0.35;
}

ul {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─────────────────────────────────────────────────────────
   BUTTONS
   ───────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: var(--fs-sm);
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform var(--transition-base), box-shadow var(--transition-base), filter var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--clr-accent);
  color: #fff;
  box-shadow: 0 6px 18px rgba(242, 140, 40, 0.22);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(242, 140, 40, 0.24);
  filter: saturate(1.04);
}

.btn-secondary {
  background: #fff;
  color: var(--clr-text-primary);
  border: 1px solid rgba(31, 78, 163, 0.16);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  background: #f7f9ff;
}

.btn-lg {
  padding: 0.85rem 1.75rem;
  font-size: var(--fs-md);
}

.btn-full-width {
  width: 100%;
  justify-content: center;
  display: flex;
  margin-bottom: 0;
}

/* ─────────────────────────────────────────────────────────
   SECTION HEADERS & TYPOGRAPHY
   ───────────────────────────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-header--compact {
  margin-bottom: var(--space-xl);
}

.section-tag {
  display: inline-block;
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  background: rgba(31, 78, 163, 0.14);
  border: 1px solid rgba(31, 78, 163, 0.35);
  color: var(--clr-primary);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: clamp(var(--fs-3xl), 4vw, var(--fs-4xl));
  font-weight: 800;
  line-height: 1.15;
  color: var(--clr-text-primary);
  margin-bottom: var(--space-md);
}

.section-title-link {
  color: inherit;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.section-title-link:hover {
  color: var(--clr-primary);
  border-color: rgba(31, 78, 163, 0.28);
}

.section-desc {
  font-size: var(--fs-lg);
  color: var(--clr-text-secondary);
  max-width: 640px;
  margin-inline: auto;
}

/* ─────────────────────────────────────────────────────────
   NAVBAR
   ───────────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: transparent;
  border-bottom: 1px solid transparent;
  padding: 1rem 0;
  transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), padding var(--transition-base);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(31, 78, 163, 0.1);
  box-shadow: 0 10px 26px rgba(15, 47, 95, 0.07);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 0.7rem 0;
}

.nav-container {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav-logo-img {
  height: 70px;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  margin-left: auto;
}

.nav-link {
  position: relative;
  padding: 0.5rem 0.82rem;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  color: #536277;
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: #102f5e;
  background: rgba(31, 78, 163, 0.08);
}

.nav-link:hover {
  transform: translateY(-1px);
}

.nav-cta {
  flex-shrink: 0;
  padding-inline: 1.1rem;
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 52px;
  height: 38px;
  padding: 0 12px;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-full);
  background: #fff;
  color: var(--clr-text-primary);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.lang-toggle:hover {
  transform: translateY(-1px);
  border-color: rgba(31, 78, 163, 0.45);
  box-shadow: var(--shadow-sm);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  margin-left: auto;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--clr-text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* ─────────────────────────────────────────────────────────
   HERO SECTION
   ───────────────────────────────────────────────────────── */
.hero {
  padding-top: 110px;
  padding-bottom: calc(var(--space-4xl) - 1rem);
}

.hero-container {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 2.5rem;
  align-items: center;
  max-width: 1180px;
}

.hero-content {
  max-width: 540px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  background: rgba(31, 78, 163, 0.1);
  color: var(--clr-primary);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.3rem;
}

.hero-title {
  font-size: clamp(3.5rem, 5vw, 4.8rem);
  font-weight: 900;
  line-height: 1.02;
  margin-bottom: 1rem;
}

.castle-logo-text {
  font-family: 'Orbitron', sans-serif;
  font-weight: 800;
  letter-spacing: 0.04em;

  background: linear-gradient(
    180deg,
    #0d54c0 0%,
    #1565C0 35%,
    #1E88E5 70%,
    #26C6DA 100%
  );

  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;

  display: inline-block;

  text-shadow:
    0 1px 0 rgba(255,255,255,0.35),
    0 8px 24px rgba(30,136,229,0.12);
}

.hero-subtitle {
  max-width: 520px;
  color: var(--clr-text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;

  text-align: justify;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 2rem;
}

.hero-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-radius: 999px;
  background: rgba(31, 78, 163, 0.06);
  border: 1px solid rgba(31, 78, 163, 0.12);
  color: var(--clr-text-primary);
  font-size: var(--fs-sm);
}

.hero-meta-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(31, 78, 163, 0.12);
  font-size: 0.95rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.hero-visual {
  display: grid;
  gap: 1.25rem;
}

.hero-slider {
  position: relative;
  min-height: 480px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: linear-gradient(180deg, rgba(255,255,255,0.96) 0%, rgba(245,248,255,0.96) 100%);
  box-shadow: 0 20px 60px rgba(15, 23, 42, 0.08);
}

.hero-slider-track,
.hero-slide {
  position: absolute;
  inset: 0;
}

.hero-slide {
  opacity: 0;
  transition: opacity 700ms ease;
}

.hero-slide.active {
  opacity: 1;
}

.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #f8fbff;
}

.hero-slider-btn {
  position: absolute;
  top: 50%;
  z-index: 3;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.38);
  border-radius: var(--radius-full);
  background: rgba(15, 23, 42, 0.42);
  color: #fff;
  transform: translateY(-50%);
  transition: transform var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
}

.hero-slider-btn:hover {
  transform: translateY(-50%) scale(1.02);
  background: rgba(15, 23, 42, 0.65);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.16);
}

.hero-slider-btn--prev {
  left: 1.5rem;
}

.hero-slider-btn--next {
  right: 1.5rem;
}

.hero-gallery-dots {
  position: absolute;
  left: 50%;
  bottom: var(--space-md);
  z-index: 3;
  display: flex;
  gap: 8px;
  transform: translateX(-50%);
}

.hero-gallery-dots button {
  width: 9px;
  height: 9px;
  border: 0;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.45);
  transition: all var(--transition-fast);
}

.hero-gallery-dots button.active {
  width: 28px;
  background: #fff;
}

/* ─────────────────────────────────────────────────────────
   CONFERENCE OVERVIEW SECTION
   ───────────────────────────────────────────────────────── */
.conference-overview {
  padding: var(--space-4xl) 0;
  background: #fff;
}

.overview-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-3xl), 6vw, 5.5rem);
  align-items: start;
}

.overview-content {
  max-width: 640px;
}

.overview-label {
  display: block;
  font-size: var(--fs-sm);
  color: var(--clr-primary);
  font-weight: 600;
  letter-spacing: 0.16em;
  margin-bottom: 1.1rem;
  text-transform: uppercase;
}

.overview-title {
  font-size: clamp(var(--fs-2xl), 3vw, var(--fs-3xl));
  font-weight: 700;
  color: var(--clr-text-primary);
  margin-bottom: 1.85rem;
  line-height: 1.18;
  max-width: 11.5em;
}

.overview-description p {
  font-size: var(--fs-lg);
  color: var(--clr-text-secondary);
  line-height: 1.86;
  margin-bottom: 1.4rem;
  max-width: 60ch;
  text-align: justify;
}

.overview-description p:last-child {
  margin-bottom: 0;
}

.theme-block {
  margin-top: 3.25rem;
  padding: 1.75rem 1.85rem;
  background: rgba(31, 78, 163, 0.045);
  border: 1px solid rgba(31, 78, 163, 0.1);
  border-left: 3px solid rgba(31, 78, 163, 0.78);
  border-radius: var(--radius-md);
}

.theme-label {
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--clr-primary);
  margin-bottom: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.theme-quote {
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--clr-text-primary);
  font-style: italic;
  line-height: 1.68;
  margin: 0;
  position: relative;
}

.theme-quote:before {
  content: '"';
  font-size: 1.4rem;
  color: rgba(31, 78, 163, 0.45);
  position: absolute;
  left: -0.9rem;
  top: -0.35rem;
}

.theme-quote:after {
  content: '"';
  font-size: 1.4rem;
  color: rgba(31, 78, 163, 0.45);
  position: absolute;
  right: -0.45rem;
  bottom: -0.45rem;
}

.overview-highlights {
  max-width: 600px;
}

.highlights-title {
  font-size: clamp(var(--fs-xl), 2vw, var(--fs-2xl));
  font-weight: 750;
  color: var(--clr-text-primary);
  margin-bottom: 1.75rem;
  text-align: left;
  line-height: 1.25;
}

.research-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.15rem;
}

.research-card {
  background: #ffffff;
  border: 1px solid rgba(31, 78, 163, 0.08);
  border-radius: var(--radius-md);
  padding: 1.55rem 1.65rem;
  box-shadow: 0 4px 18px rgba(15, 23, 42, 0.035);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.research-card:hover {
  transform: translateY(-2px);
  border-color: rgba(31, 78, 163, 0.28);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
}

.research-card h4 {
  font-size: var(--fs-md);
  font-weight: 700;
  color: var(--clr-primary);
  margin-bottom: 0.65rem;
  position: relative;
  padding-left: 1.35rem;
  line-height: 1.35;
}

.research-card h4:before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 0.55rem;
  height: 0.55rem;
  background: rgba(31, 78, 163, 0.82);
  border-radius: var(--radius-full);
  box-shadow: 0 0 0 4px rgba(31, 78, 163, 0.08);
}

.research-card p {
  font-size: var(--fs-sm);
  color: var(--clr-text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* ─────────────────────────────────────────────────────────
   CONFERENCE DETAILS SECTION
   ───────────────────────────────────────────────────────── */
.conference-info {
  padding: var(--space-4xl) 0;
  background: #fff;
}

.conference-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
  max-width: 1080px;
  margin-inline: auto;
  padding: clamp(2rem, 4vw, 3rem);
  background: #ffffff;
  border: 1px solid rgba(31, 78, 163, 0.12);
  border-radius: 22px;
  box-shadow: 0 14px 34px rgba(15, 47, 95, 0.055);
}

.conference-panel:hover {
  border-color: rgba(31, 78, 163, 0.18);
  box-shadow: 0 18px 40px rgba(15, 47, 95, 0.07);
}

.conference-panel-intro {
  position: sticky;
  top: 110px;
}

.conference-kicker {
  display: inline-block;
  color: #1f4ea3;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  line-height: 1.4;
  margin-bottom: 0.9rem;
  text-transform: uppercase;
}

.conference-panel-intro .section-title {
  color: #102f5e;
  margin-bottom: 1rem;
}

.conference-description {
  color: #64748b;
  font-size: 1rem;
  line-height: 1.85;
  max-width: 34rem;
}

.conference-detail-list {
  border-top: 1px solid rgba(31, 78, 163, 0.12);
}

.conference-detail-item {
  padding: 1.3rem 0;
  border-bottom: 1px solid rgba(31, 78, 163, 0.12);
}

.conference-detail-label {
  display: block;
  color: #6b7a90;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  line-height: 1.4;
  margin-bottom: 0.45rem;
  text-transform: uppercase;
}

.conference-detail-value {
  color: #142f55;
  font-size: clamp(1.08rem, 1.6vw, 1.35rem);
  font-weight: 650;
  line-height: 1.45;
  margin: 0;
}

.conference-detail-meta {
  color: #64748b;
  font-size: 0.9rem;
  line-height: 1.5;
  margin-top: 0.25rem;
}

.timezone-badge {
  display: inline-flex;
  align-items: center;
  margin-left: 0.45rem;
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-full);
  background: rgba(31, 78, 163, 0.09);
  color: #1f4ea3;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  vertical-align: middle;
}

.schedule-preview {
  margin-top: 1.5rem;
  padding-top: 1.35rem;
}

.schedule-preview-label {
  display: block;
  color: #6b7a90;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  margin-bottom: 0.85rem;
  text-transform: uppercase;
}

.schedule-preview ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.schedule-preview li {
  padding: 0.45rem 0.75rem;
  border: 1px solid rgba(31, 78, 163, 0.12);
  border-radius: var(--radius-full);
  color: #334155;
  background: #f8fafc;
  font-size: 0.86rem;
  font-weight: 600;
  line-height: 1.35;
}

/* ─────────────────────────────────────────────────────────
   PUBLICATION SECTION
   ───────────────────────────────────────────────────────── */
.publication-section {
  padding: var(--space-4xl) 0;
  background: #f8fafc;
}

.publication-header {
  margin-bottom: 3.5rem;
}

.publication-header .section-desc {
  max-width: 760px;
  line-height: 1.75;
}

.publication-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2xl);
}

.journal-card-link {
  display: block;
  height: 100%;
  color: inherit;
  cursor: pointer;
  border-radius: var(--radius-lg);
  outline: none;
}

.journal-card-link:focus-visible {
  box-shadow: 0 0 0 4px rgba(31, 78, 163, 0.16);
}

.publication-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  background: #fff;
  border: 1px solid rgba(31, 78, 163, 0.09);
  border-radius: var(--radius-lg);
  box-shadow: 0 6px 24px rgba(15, 23, 42, 0.05);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.publication-card:hover {
  transform: translateY(-2px);
  border-color: rgba(31, 78, 163, 0.28);
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.08);
}

.journal-card-link:focus-visible .publication-card {
  transform: translateY(-2px);
  border-color: rgba(31, 78, 163, 0.32);
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.08);
}

.publication-image {
  padding: 0.9rem 0.9rem 0;
  background: linear-gradient(180deg, rgba(31, 78, 163, 0.045), rgba(255, 255, 255, 0));
}

.publication-image img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: top center;
  border-radius: var(--radius-md);
  border: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.055);
}

.publication-card:nth-child(2) .publication-image img {
  filter: brightness(0.95) saturate(0.98);
}

.publication-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: flex-start;
  padding: 1.2rem 1.25rem 1.3rem;
  text-align: justify;
}

.publication-body h3 {
  font-size: var(--fs-xl);
  font-weight: 750;
  color: var(--clr-text-primary);
  line-height: 1.25;
  margin-bottom: 0.65rem;
  text-align: justify;
}

.publication-body p {
  color: var(--clr-text-secondary);
  font-size: var(--fs-sm);
  line-height: 1.68;
  margin-bottom: 1.15rem;
  text-align: justify;
}

.publication-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.55rem;
  margin-top: auto;
  padding: 0.65rem 1rem;
  border: 1px solid rgba(31, 78, 163, 0.24);
  border-radius: var(--radius-full);
  color: var(--clr-primary);
  font-size: var(--fs-sm);
  font-weight: 700;
  transition: background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.publication-link:hover,
.journal-card-link:hover .publication-link,
.journal-card-link:focus-visible .publication-link {
  background: rgba(31, 78, 163, 0.075);
  border-color: rgba(31, 78, 163, 0.38);
  box-shadow: 0 8px 18px rgba(31, 78, 163, 0.1);
  transform: translateY(-1px);
}

/* ─────────────────────────────────────────────────────────
   SPEAKERS SECTION
   ───────────────────────────────────────────────────────── */
.speakers {
  padding: var(--space-4xl) 0;
  background: #F8FAFC;
}

.speakers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2xl);
}

.speaker-card {
  background: #ffffff;
  border: 1px solid rgba(82, 95, 123, 0.12);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 10px 24px rgba(19, 43, 76, 0.06);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.speaker-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 38px rgba(19, 43, 76, 0.10);
  border-color: rgba(31, 78, 163, 0.18);
}

.speaker-media {
  width: 100%;
  height: 220px;
  overflow: hidden;
  background: #eaf4fb;
}

.speaker-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  object-position: center top;
}

.speaker-body {
  padding: var(--space-lg);
}

.speaker-name {
  font-size: var(--fs-md);
  font-weight: 700;
  color: var(--clr-text-primary);
  margin: 0 0 0.35rem;
  line-height: 1.25;
}

.speaker-institution {
  font-size: var(--fs-sm);
  color: #55729f;
  font-weight: 500;
  margin: 0 0 var(--space-md);
}

.speaker-topic {
  font-size: var(--fs-sm);
  color: var(--clr-text-secondary);
  line-height: 1.7;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.speaker-profile-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2xl);
}

.speaker-profile-card {
  background: #ffffff;
  border: 1px solid rgba(31, 78, 163, 0.1);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 10px 26px rgba(15, 47, 95, 0.06);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.speaker-profile-card:hover {
  transform: translateY(-2px);
  border-color: rgba(31, 78, 163, 0.22);
  box-shadow: 0 18px 38px rgba(15, 47, 95, 0.1);
}

.speaker-profile-card img {
  width: 100%;
  height: 230px;
  object-fit: cover;
  object-position: center top;
  background: #eaf4fb;
}

.speaker-profile-card > div {
  padding: 1.15rem 1.25rem 1.25rem;
}

.speaker-profile-card h3 {
  color: #102f5e;
  font-size: var(--fs-lg);
  line-height: 1.25;
  margin-bottom: 0.35rem;
}

.speaker-info-split {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
  gap: var(--space-2xl);
  align-items: stretch;
}

.speaker-info-panel {
  background: #ffffff;
  border: 1px solid rgba(31, 78, 163, 0.12);
  border-radius: var(--radius-md);
  padding: 1.45rem;
  box-shadow: 0 12px 30px rgba(15, 47, 95, 0.06);
}

.speaker-info-panel--accent {
  background: #f7f9ff;
}

.speaker-info-panel h2 {
  color: #102f5e;
  font-size: var(--fs-2xl);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.speaker-info-list,
.speaker-benefit-list {
  display: grid;
  gap: 1rem;
}

.speaker-info-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.speaker-info-list h3,
.speaker-benefit-list h3 {
  color: #102f5e;
  font-size: var(--fs-md);
  margin-bottom: 0.35rem;
}

/* ─────────────────────────────────────────────────────────
   TIMELINE SECTION
   ───────────────────────────────────────────────────────── */
.timeline-section {
  padding: var(--space-4xl) 0;
  background: #f8fafc;
  color: #0f2f5f;
}

.timeline-section .section-header {
  max-width: 620px;
  margin-inline: auto;
}

.timeline-simple {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.1rem;
  width: min(100%, 880px);
  margin-inline: auto;
  padding-top: 0.5rem;
  position: relative;
}

.timeline-simple:before {
  content: '';
  position: absolute;
  top: 0.5rem;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: linear-gradient(180deg, rgba(31, 78, 163, 0.42), rgba(31, 78, 163, 0.12));
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  flex-direction: column;
  width: calc(50% - 2rem);
  padding: 1.25rem 1.35rem;
  background: #ffffff;
  border: 1px solid rgba(31, 78, 163, 0.1);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 28px rgba(15, 47, 95, 0.055);
  text-align: left;
  position: relative;
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.timeline-item:nth-child(odd) {
  justify-self: start;
}

.timeline-item:nth-child(even) {
  justify-self: end;
}

.timeline-item:hover {
  transform: translateY(-2px);
  border-color: rgba(31, 78, 163, 0.18);
  box-shadow: 0 16px 34px rgba(15, 47, 95, 0.085);
}

.timeline-item::before {
  content: '';
  position: absolute;
  top: 50%;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--clr-primary);
  box-shadow: 0 0 0 6px rgba(31, 78, 163, 0.14);
  transform: translateY(-50%);
}

.timeline-item:nth-child(odd)::before {
  right: -2.45rem;
}

.timeline-item:nth-child(even)::before {
  left: -2.45rem;
}

.timeline-category {
  color: #6b7a90;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  line-height: 1.4;
  margin-bottom: 0.8rem;
  text-transform: uppercase;
}

.timeline-date {
  color: #1f4ea3;
  font-size: clamp(1rem, 1.3vw, 1.15rem);
  font-weight: 800;
  letter-spacing: 0.03em;
  line-height: 1.35;
  margin: 0 0 0.75rem;
  max-width: 14rem;
  text-transform: uppercase;
}

.timeline-item h4 {
  color: #142f55;
  font-size: clamp(1rem, 1.4vw, 1.12rem);
  font-weight: 650;
  line-height: 1.35;
  margin: 0 0 0.6rem;
}

.timeline-description {
  color: #64748b;
  font-size: 0.93rem;
  line-height: 1.75;
  margin: 0;
}

.timeline-vertical {
  position: relative;
  display: grid;
  gap: 1rem;
  width: min(100%, 860px);
  margin: 0 auto;
  padding-left: 2rem;
}

.timeline-vertical::before {
  content: '';
  position: absolute;
  left: 13px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, rgba(31, 78, 163, 0.45), rgba(31, 78, 163, 0.08));
}

.timeline-entry {
  position: relative;
  padding: 1.1rem 1.3rem 1.1rem 2.35rem;
  background: #ffffff;
  border: 1px solid rgba(31, 78, 163, 0.1);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 30px rgba(15, 47, 95, 0.06);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.timeline-entry::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 50%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #1f4ea3;
  box-shadow: 0 0 0 6px rgba(31, 78, 163, 0.12);
  transform: translateY(-50%);
}

.timeline-entry:hover {
  transform: translateY(-2px);
  border-color: rgba(31, 78, 163, 0.2);
  box-shadow: 0 18px 38px rgba(15, 47, 95, 0.1);
}

.timeline-entry.is-complete {
  background: #f8fafc;
  border-color: rgba(31, 78, 163, 0.16);
}

.timeline-entry.is-complete::before {
  background: #94a3b8;
  box-shadow: 0 0 0 6px rgba(148, 163, 184, 0.18);
}

.timeline-entry-date {
  color: #1f4ea3;
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 0.45rem;
  display: inline-flex;
  width: auto;
  padding: 0.24rem 0.58rem;
  border-radius: var(--radius-full);
  background: rgba(31, 78, 163, 0.08);
}

.timeline-entry-title {
  color: #142f55;
  font-size: clamp(1rem, 1.3vw, 1.1rem);
  font-weight: 700;
  margin: 0 0 0.55rem;
}

.timeline-entry-desc {
  color: #64748b;
  font-size: 0.93rem;
  line-height: 1.7;
  margin: 0;
}

.timeline-entry.is-complete .timeline-entry-date,
.timeline-entry.is-complete .timeline-entry-title {
  color: #94a3b8;
  text-decoration: line-through;
}

.timeline-item.is-complete {
  background: #f8fafc;
}

.timeline-item.is-complete::before {
  background: #94a3b8;
  box-shadow: 0 0 0 6px rgba(148, 163, 184, 0.18);
}

.timeline-item.is-complete .timeline-date,
.timeline-item.is-complete h4 {
  color: #94a3b8;
  text-decoration: line-through;
}

/* ─────────────────────────────────────────────────────────
   ARCHIVES SECTION
   ───────────────────────────────────────────────────────── */
.archives-section {
  padding: var(--space-4xl) 0;
  background: #ffffff;
}

.archives-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2xl);
}

.archive-vertical-list {
  display: grid;
  gap: var(--space-xl);
}

.archive-year-card {
  display: grid;
  grid-template-columns: minmax(150px, 0.24fr) minmax(0, 1fr);
  gap: var(--space-xl);
  padding: clamp(1rem, 2vw, 1.45rem);
  border: 1px solid rgba(31, 78, 163, 0.12);
  border-radius: var(--radius-md);
  background: #ffffff;
  box-shadow: 0 14px 32px rgba(15, 47, 95, 0.07);
}

.archive-year-logo {
  display: grid;
  place-items: center;
  gap: 0.8rem;
  align-content: center;
  min-height: 170px;
  border-radius: var(--radius-md);
  background: #f7f9ff;
  border: 1px solid rgba(31, 78, 163, 0.1);
  color: #102f5e;
  font-weight: 800;
}

.archive-year-logo img {
  width: min(92px, 54%);
}

.archive-year-content h2 {
  color: #102f5e;
  font-size: var(--fs-2xl);
  line-height: 1.22;
  margin: 0 0 1rem;
}

.archive-speaker-strip {
  display: grid;
  grid-template-columns: 94px minmax(0, 1fr);
  gap: 1rem;
  align-items: center;
  padding: 1rem;
  margin-top: 0.75rem;
  border-radius: var(--radius-sm);
  background: #f8fafc;
  border: 1px solid rgba(31, 78, 163, 0.1);
}

.archive-speaker-dummy {
  width: 94px;
  height: 94px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #ffffff;
  font-weight: 800;
}

.archive-speaker-strip h3 {
  color: #102f5e;
  font-size: var(--fs-md);
  margin-bottom: 0.25rem;
}

.archive-speaker-strip p,
.archive-output-row span {
  color: #64748b;
  font-size: var(--fs-sm);
  line-height: 1.6;
}

.archive-output-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  align-items: center;
  margin-top: 1rem;
}

.archive-output-row a {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.8rem;
  border-radius: var(--radius-full);
  background: #1f4ea3;
  color: #ffffff;
  font-size: var(--fs-xs);
  font-weight: 800;
}

.archive-output-row a:not(.archive-youtube-link) {
  background: #f7f9ff;
  color: #1f4ea3;
  border: 1px solid rgba(31, 78, 163, 0.18);
}

.youtube-mark {
  position: relative;
  display: inline-flex;
  width: 1.15rem;
  height: 0.82rem;
  border-radius: 0.22rem;
  background: #ff0000;
  flex: 0 0 auto;
}

.youtube-mark::after {
  content: '';
  position: absolute;
  left: 0.45rem;
  top: 0.2rem;
  border-left: 0.32rem solid #ffffff;
  border-top: 0.2rem solid transparent;
  border-bottom: 0.2rem solid transparent;
}

.archive-card {
  display: flex;
  flex-direction: column;
  background: #ffffff;
  border: 1px solid rgba(31, 78, 163, 0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 10px 26px rgba(15, 47, 95, 0.06);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.archive-card:hover {
  transform: translateY(-3px);
  border-color: rgba(31, 78, 163, 0.22);
  box-shadow: 0 18px 38px rgba(15, 47, 95, 0.1);
}

.archive-media {
  position: relative;
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(31, 78, 163, 0.16), rgba(108, 123, 217, 0.18), rgba(242, 140, 40, 0.2));
  color: #102f5e;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.archive-media::after {
  content: '';
  position: absolute;
  inset: 14px;
  border-radius: var(--radius-md);
  border: 1px dashed rgba(255, 255, 255, 0.65);
}

.archive-media span {
  position: relative;
  z-index: 1;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(31, 78, 163, 0.16);
  font-size: var(--fs-xs);
}

.archive-body {
  display: flex;
  flex-direction: column;
  padding: 1.3rem 1.45rem 1.6rem;
}

.archive-body h3 {
  font-size: var(--fs-lg);
  font-weight: 750;
  color: #102f5e;
  margin-bottom: 0.45rem;
}

.archive-meta {
  font-size: var(--fs-xs);
  color: #6b7a90;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  margin-bottom: 0.85rem;
}

.archive-desc {
  font-size: var(--fs-sm);
  color: var(--clr-text-secondary);
  line-height: 1.7;
  margin-bottom: 1rem;
  text-align: justify;
}

.archive-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.archive-tags span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-full);
  background: rgba(31, 78, 163, 0.08);
  color: #1f4ea3;
  font-size: var(--fs-xs);
  font-weight: 700;
}

.archive-link {
  margin-top: 0.35rem;
  align-self: flex-start;
}

.archives-actions {
  display: flex;
  justify-content: center;
  margin-top: 2rem;
}

/* ─────────────────────────────────────────────────────────
   COMMITTEE SECTION
   ───────────────────────────────────────────────────────── */
.committee-section {
  padding: var(--space-4xl) 0;
  background: #f8fafc;
}

.committee-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2xl);
}

.committee-grid--institutions {
  max-width: 980px;
  margin-inline: auto;
}

.committee-card {
  background: #ffffff;
  border: 1px solid rgba(31, 78, 163, 0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 10px 24px rgba(15, 47, 95, 0.06);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.committee-card:hover {
  transform: translateY(-3px);
  border-color: rgba(31, 78, 163, 0.22);
  box-shadow: 0 18px 38px rgba(15, 47, 95, 0.1);
}

.committee-photo {
  position: relative;
  height: 220px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(31, 78, 163, 0.14), rgba(108, 123, 217, 0.18), rgba(242, 140, 40, 0.2));
}

.committee-photo::after {
  content: '';
  position: absolute;
  inset: 14px;
  border-radius: var(--radius-md);
  border: 1px dashed rgba(255, 255, 255, 0.65);
}

.committee-photo span {
  position: relative;
  z-index: 1;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.82);
  color: #1f4ea3;
  font-size: var(--fs-xs);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.committee-photo--logo {
  height: 120px;
}

.committee-photo--logo span {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.6rem;
  color: #ffffff;
  background: rgba(31, 78, 163, 0.86);
}

.committee-body {
  padding: 1.2rem 1.45rem 1.55rem;
}

.committee-name {
  font-size: var(--fs-md);
  font-weight: 700;
  color: #102f5e;
  margin: 0 0 0.35rem;
}

.committee-role {
  font-size: var(--fs-xs);
  color: #1f4ea3;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 0.5rem;
}

.committee-affil {
  font-size: var(--fs-sm);
  color: #64748b;
  margin: 0;
}

.committee-desc {
  margin-top: 0.6rem;
  font-size: var(--fs-sm);
  color: var(--clr-text-secondary);
  line-height: 1.7;
}

/* ─────────────────────────────────────────────────────────
   DETAIL PAGES
   ───────────────────────────────────────────────────────── */
.page-hero {
  padding: 140px 0 80px;
  background:
    radial-gradient(circle at 8% 0%, rgba(31, 78, 163, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 90% 10%, rgba(242, 140, 40, 0.08) 0%, transparent 35%),
    #ffffff;
}

.page-title {
  font-size: clamp(var(--fs-3xl), 4vw, var(--fs-4xl));
  font-weight: 800;
  line-height: 1.15;
  color: var(--clr-text-primary);
  margin-bottom: 0.75rem;
}

.page-subtitle {
  max-width: 720px;
  color: var(--clr-text-secondary);
  font-size: var(--fs-lg);
  line-height: 1.75;
  margin: 0;
}

.detail-section {
  padding: var(--space-4xl) 0;
  background: #ffffff;
}

.detail-section.alt {
  background: #f8fafc;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2xl);
}

.detail-grid--two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.detail-card {
  background: #ffffff;
  border: 1px solid rgba(31, 78, 163, 0.1);
  border-radius: var(--radius-lg);
  padding: 1.4rem 1.55rem;
  box-shadow: 0 10px 26px rgba(15, 47, 95, 0.06);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.detail-card:hover {
  transform: translateY(-2px);
  border-color: rgba(31, 78, 163, 0.22);
  box-shadow: 0 18px 38px rgba(15, 47, 95, 0.1);
}

.detail-card.compact {
  padding: 1rem 1.25rem;
}

.detail-card h3 {
  font-size: var(--fs-lg);
  font-weight: 750;
  color: #102f5e;
  margin-bottom: 0.4rem;
}

.detail-meta {
  color: #55729f;
  font-size: var(--fs-sm);
  font-weight: 600;
  margin-bottom: 0.8rem;
}

.detail-desc {
  color: var(--clr-text-secondary);
  font-size: var(--fs-sm);
  line-height: 1.7;
  margin: 0;
}

.detail-list {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.detail-list li {
  position: relative;
  padding-left: 1.2rem;
  font-size: var(--fs-sm);
  color: #64748b;
  line-height: 1.7;
}

.detail-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6rem;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: rgba(31, 78, 163, 0.7);
  box-shadow: 0 0 0 3px rgba(31, 78, 163, 0.12);
}

.important-note-panel {
  width: min(100%, 1040px);
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(260px, 0.85fr) minmax(0, 1.15fr);
  gap: var(--space-xl);
  padding: 1.5rem;
  border: 1px solid rgba(31, 78, 163, 0.12);
  border-radius: var(--radius-md);
  background: #ffffff;
  box-shadow: 0 16px 36px rgba(15, 47, 95, 0.08);
}

.important-note-heading h2 {
  color: #102f5e;
  font-size: var(--fs-2xl);
  line-height: 1.2;
  margin-bottom: 0.6rem;
}

.important-note-heading p {
  color: #64748b;
  font-size: var(--fs-sm);
  line-height: 1.75;
}

.important-note-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.important-note-item {
  padding: 1rem 1.05rem;
  border: 1px solid rgba(31, 78, 163, 0.1);
  border-radius: var(--radius-sm);
  background: #f8fafc;
}

.important-note-item h3 {
  color: #102f5e;
  font-size: var(--fs-md);
  margin-bottom: 0.35rem;
}

.publication-accordion-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2xl);
}

.publication-notice {
  width: min(100%, 1000px);
  margin: 0 auto var(--space-2xl);
  padding: clamp(1.2rem, 2.2vw, 1.8rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.2rem;
  align-items: center;
  border: 1px solid rgba(31, 78, 163, 0.12);
  border-left: 4px solid var(--clr-accent);
  border-radius: var(--radius-md);
  background: #f8fafc;
  box-shadow: var(--shadow-sm);
}

.publication-action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  justify-content: flex-end;
}

.publication-choice-shell {
  display: grid;
  gap: var(--space-xl);
}

.publication-choice-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2xl);
}

.publication-choice {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: clamp(1rem, 1.8vw, 1.35rem);
  text-align: left;
  border: 1px solid rgba(31, 78, 163, 0.1);
  border-radius: var(--radius-md);
  background: #ffffff;
  box-shadow: 0 10px 26px rgba(15, 47, 95, 0.06);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

.publication-choice:hover,
.publication-choice.is-active {
  transform: translateY(-2px);
  border-color: rgba(31, 78, 163, 0.34);
  background: #f7f9ff;
  box-shadow: 0 16px 34px rgba(15, 47, 95, 0.1);
}

.publication-flow-section {
  background: #f7f9ff;
}

.publication-flow-grid .detail-card {
  border-left: 4px solid var(--clr-primary);
  background: #ffffff;
}

.publication-flow-grid .detail-card h3 {
  display: inline-flex;
  padding: 0.28rem 0.65rem;
  border-radius: var(--radius-full);
  background: rgba(31, 78, 163, 0.08);
  font-size: var(--fs-md);
}

.publication-detail-stage {
  width: min(100%, 920px);
  margin-inline: auto;
}

.publication-notice h2 {
  color: #102f5e;
  font-size: var(--fs-2xl);
  line-height: 1.25;
  margin-bottom: 0.45rem;
}

.publication-notice p {
  color: #64748b;
  font-size: var(--fs-md);
  line-height: 1.7;
  margin: 0;
}

.publication-accordion {
  background: #ffffff;
  border: 1px solid rgba(31, 78, 163, 0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 10px 26px rgba(15, 47, 95, 0.06);
}

.publication-summary {
  list-style: none;
  display: flex;
  gap: 1rem;
  padding: 1.2rem 1.35rem;
  cursor: pointer;
  align-items: center;
}

.publication-summary::-webkit-details-marker {
  display: none;
}

.publication-cover {
  width: 90px;
  height: 120px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.08);
  flex-shrink: 0;
  background: #f8fafc;
}

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

.publication-summary-body h3 {
  font-size: var(--fs-xl);
  font-weight: 750;
  color: #102f5e;
  margin-bottom: 0.35rem;
}

.publication-summary-body p {
  font-size: var(--fs-md);
  color: #64748b;
  margin: 0;
  line-height: 1.55;
}

.publication-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--fs-xs);
  color: #1f4ea3;
  font-weight: 700;
  margin-top: 0.6rem;
}

.publication-details {
  border: 1px solid rgba(31, 78, 163, 0.12);
  border-left: 4px solid var(--clr-primary);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.35rem 1.35rem;
  display: none;
  flex-direction: column;
  gap: 0.75rem;
  background: #ffffff;
  box-shadow: 0 14px 30px rgba(15, 47, 95, 0.08);
}

.publication-details.is-active {
  display: flex;
}

.publication-guidelines {
  display: grid;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
}

.publication-guidelines li {
  position: relative;
  padding-left: 1rem;
  color: #64748b;
  font-size: var(--fs-xs);
  line-height: 1.6;
}

.publication-guidelines li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.58rem;
  width: 0.35rem;
  height: 0.35rem;
  border-radius: 50%;
  background: var(--clr-accent);
}

.publication-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.publication-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(31, 78, 163, 0.24);
  color: #1f4ea3;
  font-size: var(--fs-xs);
  font-weight: 700;
  background: #f8fafc;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.publication-links a:hover {
  transform: translateY(-1px);
  border-color: rgba(31, 78, 163, 0.4);
  box-shadow: 0 8px 18px rgba(31, 78, 163, 0.12);
}

.publication-accordion[open] .publication-summary {
  background: #f8fafc;
}

.payment-detail {
  margin-top: 2.2rem;
  width: min(100%, 1000px);
  margin-inline: auto;
}

.payment-intro {
  text-align: center;
}

.payment-intro h2 {
  color: #102f5e;
  font-size: var(--fs-2xl);
  line-height: 1.2;
  margin-bottom: 0.45rem;
}

.payment-intro p {
  color: #64748b;
  font-size: var(--fs-sm);
  line-height: 1.7;
  margin: 0;
}

.payment-options {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-md);
  margin-top: 1.5rem;
}

.payment-option {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(31, 78, 163, 0.12);
  background: #ffffff;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.payment-option img {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  object-fit: cover;
  background: #f8fafc;
}

.payment-option span {
  font-size: var(--fs-sm);
  font-weight: 700;
  color: #102f5e;
}

.payment-option:hover {
  transform: translateY(-1px);
  border-color: rgba(31, 78, 163, 0.3);
  box-shadow: 0 12px 24px rgba(15, 47, 95, 0.1);
}

.payment-option.is-active {
  border-color: rgba(31, 78, 163, 0.42);
  background: #f7f9ff;
  box-shadow: 0 14px 28px rgba(15, 47, 95, 0.12);
}

.payment-panels {
  margin-top: 1.4rem;
}

.payment-panel {
  display: none;
  background: #ffffff;
  border: 1px solid rgba(31, 78, 163, 0.1);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.35rem;
  box-shadow: var(--shadow-sm);
  gap: 1.15rem;
  align-items: start;
}

.payment-panel.is-active {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
}

.payment-panel-logo {
  width: 92px;
  height: 92px;
  object-fit: contain;
  border: 1px solid rgba(31, 78, 163, 0.12);
  border-radius: var(--radius-md);
  background: #f8fafc;
  padding: 0.65rem;
}

.payment-panel h3 {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: #102f5e;
  margin-bottom: 0.5rem;
}

.payment-panel p,
.payment-panel a {
  font-size: var(--fs-sm);
  color: #64748b;
  line-height: 1.6;
}

.payment-panel ol {
  margin: 0.85rem 0 0;
  padding-left: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  color: #64748b;
  font-size: var(--fs-sm);
  line-height: 1.7;
}

.payment-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-lg);
}

.payment-card {
  background: #ffffff;
  border: 1px solid rgba(31, 78, 163, 0.1);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.3rem;
  box-shadow: var(--shadow-sm);
}

.payment-card h3 {
  font-size: var(--fs-md);
  font-weight: 700;
  color: #102f5e;
  margin-bottom: 0.4rem;
}

.payment-card p,
.payment-card a {
  font-size: var(--fs-sm);
  color: #64748b;
  line-height: 1.6;
}

.payment-steps {
  margin-top: 2rem;
}

.payment-steps h3 {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: #102f5e;
  margin-bottom: 0.75rem;
}

.payment-steps ol {
  margin: 0;
  padding-left: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  color: #64748b;
  font-size: var(--fs-sm);
  line-height: 1.7;
}

.payment-note {
  text-align: center;
  margin-top: 1.4rem;
  font-size: var(--fs-sm);
  color: #64748b;
}

/* ─────────────────────────────────────────────────────────
   FEE SECTION
   ───────────────────────────────────────────────────────── */
.fee-section {
  padding: var(--space-4xl) 0;
  background: #fff;
}

.publication-fee-table-wrap {
  width: min(100%, 1000px);
  margin-inline: auto;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid rgba(31, 78, 163, 0.12);
  border-radius: 20px;
  background: #ffffff;
  box-shadow: 0 14px 34px rgba(15, 47, 95, 0.06);
}

.publication-fee-table-wrap::-webkit-scrollbar {
  height: 8px;
}

.publication-fee-table-wrap::-webkit-scrollbar-thumb {
  background: rgba(31, 78, 163, 0.18);
  border-radius: var(--radius-full);
}

.publication-fee-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  color: #142f55;
}

.publication-fee-table th,
.publication-fee-table td {
  padding: 1.2rem 1.35rem;
  border-bottom: 1px solid rgba(31, 78, 163, 0.1);
  text-align: left;
  vertical-align: middle;
}

.publication-fee-table thead th {
  background: #f6f9fd;
  color: #173b6c;
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.05em;
  line-height: 1.45;
  text-transform: uppercase;
}

.publication-fee-table tbody th {
  color: #102f5e;
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.45;
}

.publication-fee-table tbody td {
  color: #334155;
  font-size: 0.95rem;
  font-weight: 600;
}

.publication-fee-table tbody tr {
  transition: background var(--transition-fast);
}

.publication-fee-table tbody tr:hover {
  background: #f9fbff;
}

.publication-fee-table tbody tr:last-child th,
.publication-fee-table tbody tr:last-child td {
  border-bottom: 0;
}

.fee-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 4rem;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-full);
  background: rgba(31, 78, 163, 0.09);
  color: #1f4ea3;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.fee-amount {
  color: #142f55;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.fee-note {
  text-align: center;
  font-size: var(--fs-sm);
  color: #64748b;
  margin-top: 1.35rem;
}

/* ─────────────────────────────────────────────────────────
   FOOTER
   ───────────────────────────────────────────────────────── */
.footer {
  background:
    linear-gradient(135deg, rgba(31, 78, 163, 0.96), rgba(16, 47, 94, 0.98));
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  padding: calc(var(--space-4xl) - 0.5rem) 0 var(--space-xl);
  color: #ffffff;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(180px, 0.75fr) minmax(260px, 1fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  margin-bottom: var(--space-3xl);
  align-items: start;
}

.footer-logo {
  height: 58px;
  width: auto;
  display: block;
}

.footer-brand p {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.76);
  line-height: 1.75;
  margin-top: 0.85rem;
  max-width: 480px;
}

.footer-tagline {
  color: #ffffff;
  font-weight: 700;
  margin-top: 1.15rem;
  max-width: 34rem;
}

.footer-socials {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: 1.4rem;
}

.footer-social {
  min-height: 38px;
  padding: 0.55rem 0.9rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  font-size: var(--fs-xs);
  font-weight: 800;
  color: #ffffff;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.footer-icon {
  display: inline-grid;
  place-items: center;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
  font-size: 0.82rem;
  line-height: 1;
}

.footer-social:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.34);
  color: #ffffff;
}

.footer-col h4 {
  font-size: var(--fs-xs);
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-col ul li,
.footer-col ul li a {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.74);
  line-height: 1.65;
  transition: color var(--transition-fast);
}

.footer-col ul li a:hover {
  color: #ffffff;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.68);
  flex-wrap: wrap;
  gap: var(--space-md);
}

/* ─────────────────────────────────────────────────────────
   ANIMATIONS & REVEAL
   ───────────────────────────────────────────────────────── */
[data-aos] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos="fade-left"] {
  transform: translateX(24px);
}

[data-aos="fade-right"] {
  transform: translateX(-24px);
}

[data-aos].aos-animate {
  opacity: 1;
  transform: translate(0);
}

[data-aos-delay="100"] {
  transition-delay: 0.1s;
}

[data-aos-delay="200"] {
  transition-delay: 0.2s;
}

[data-aos-delay="300"] {
  transition-delay: 0.3s;
}

/* ─────────────────────────────────────────────────────────
   RESPONSIVE DESIGN
   ───────────────────────────────────────────────────────── */

/* Tablets & Small Desktops (1024px and below) */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
    text-align: center;
  }

  .hero-content .hero-badge,
  .hero-actions {
    justify-content: center;
  }

  .hero-subtitle {
    margin-inline: auto;
  }

  .hero-visual {
    max-width: 520px;
    margin-inline: auto;
  }

  .overview-container {
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
  }

  .overview-content,
  .overview-highlights {
    max-width: 100%;
  }

  .overview-title {
    max-width: 14em;
  }

  .conference-panel {
    grid-template-columns: 1fr;
  }

  .conference-panel-intro {
    position: static;
  }

  .publication-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .speakers-grid,
  .speaker-profile-grid {
    grid-template-columns: 1fr 1fr;
  }

  .speaker-info-split,
  .publication-notice,
  .important-note-panel,
  .archive-year-card {
    grid-template-columns: 1fr;
  }

  .publication-notice,
  .important-note-panel,
  .speaker-info-panel,
  .archive-year-card,
  .payment-panel,
  .detail-card {
    padding: 1.15rem;
  }

  .publication-choice-grid {
    grid-template-columns: 1fr;
  }

  .timeline-simple {
    max-width: 720px;
  }

  .detail-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .publication-accordion-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .payment-options {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .archives-grid,
  .committee-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* Mobile (768px and below) */
@media (max-width: 768px) {
  :root {
    --container-pad: 1rem;
    --space-4xl: 4rem;
  }

  .nav-links {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    border-left: 1px solid rgba(31, 78, 163, 0.1);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.7rem;
    transform: translateX(100%);
    transition: transform 340ms ease;
    z-index: 999;
    padding: 6rem 1.5rem;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  .nav-links.open {
    transform: translateX(0);
  }

  .hamburger {
    display: flex;
  }

  .nav-logo-img {
    height: 58px;
  }

  .nav-cta {
    display: none;
  }

  .hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
  }

  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }

  .hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }

  .hero {
    padding-top: 90px;
    padding-bottom: var(--space-3xl);
  }

  .hero-title {
    font-size: clamp(2.75rem, 10vw, 3.6rem);
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-subtitle {
    max-width: 100%;
  }

  .hero-meta {
    flex-direction: column;
    gap: 0.75rem;
  }

  .hero-slider {
    min-height: 350px;
  }

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

  .conference-panel {
    padding: 1.5rem;
    border-radius: 18px;
  }

  .conference-detail-item {
    padding: 1.1rem 0;
  }

  .schedule-preview ul {
    gap: 0.5rem;
  }

  .publication-grid {
    grid-template-columns: 1fr;
  }

  .speakers-grid,
  .speaker-profile-grid {
    grid-template-columns: 1fr;
  }

  .timeline-simple {
    max-width: 520px;
  }

  .timeline-simple:before {
    left: 9px;
    transform: none;
  }

  .timeline-item {
    width: auto;
    justify-self: stretch;
    margin-left: 1.6rem;
  }

  .timeline-item:nth-child(even),
  .timeline-item:nth-child(odd) {
    justify-self: stretch;
  }

  .timeline-item:nth-child(even)::before,
  .timeline-item:nth-child(odd)::before {
    left: -1.95rem;
    right: auto;
  }

  .timeline-vertical {
    padding-left: 1.6rem;
  }

  .timeline-vertical::before {
    left: 9px;
  }

  .timeline-entry {
    padding: 1.2rem 1.3rem 1.2rem 2.3rem;
  }

  .timeline-entry::before {
    left: 2px;
  }

  .publication-summary {
    flex-direction: column;
    align-items: flex-start;
  }

  .publication-cover {
    width: 100%;
    height: 180px;
  }

  .page-hero {
    padding: 120px 0 70px;
    text-align: center;
  }

  .page-subtitle {
    margin-inline: auto;
  }

  .detail-grid,
  .detail-grid--two,
  .publication-accordion-grid,
  .payment-options {
    grid-template-columns: 1fr;
  }

  .publication-notice,
  .publication-choice,
  .important-note-panel,
  .speaker-info-panel,
  .archive-year-card,
  .payment-panel,
  .detail-card,
  .committee-card,
  .speaker-profile-card {
    border-radius: var(--radius-md);
  }

  .publication-choice {
    align-items: flex-start;
  }

  .archive-speaker-strip {
    grid-template-columns: 82px minmax(0, 1fr);
  }

  .archive-speaker-dummy {
    width: 82px;
    height: 82px;
  }

  .speaker-info-list,
  .important-note-grid {
    grid-template-columns: 1fr;
  }

  .publication-action-row {
    justify-content: flex-start;
  }

  .payment-panel.is-active {
    grid-template-columns: 1fr;
  }

  .payment-panel-logo {
    width: 78px;
    height: 78px;
  }

  .archives-grid,
  .committee-grid {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    padding: 1.35rem;
  }

  .timeline-date {
    font-size: 1rem;
  }

  .publication-fee-table {
    min-width: 680px;
  }

  .publication-fee-table th,
  .publication-fee-table td {
    padding: 1rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .nav-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: min(260px, 72vw);
    min-height: 48px;
    font-size: var(--fs-md);
    padding: 0.8rem 1.2rem;
  }
}

/* Small Mobile (480px and below) */
@media (max-width: 480px) {
  .hero-title {
    font-size: 2.2rem;
  }

  .section-title {
    font-size: clamp(1.5rem, 8vw, 2rem);
  }

  .timeline-section {
    padding-block: var(--space-4xl);
  }

  .publication-notice,
  .publication-choice,
  .important-note-panel,
  .speaker-info-panel,
  .archive-year-card,
  .payment-panel,
  .detail-card {
    padding: 1rem;
  }

  .archive-speaker-strip {
    grid-template-columns: 1fr;
  }

  .archive-speaker-dummy {
    width: 96px;
    height: 96px;
  }

  .archive-year-logo {
    min-height: 140px;
  }

  .timezone-badge {
    margin-left: 0.25rem;
  }
}