:root {
  --navy: #00133f;
  --navy-2: #001b55;
  --cyan: #00e6eb;
  --blue: #0757f5;
  --sky: #83c6e5;
  --white: #fff;
  --text: #071a43;
  --max: 1240px;
}

/* Lazysizes Loading Transition */
img.lazyload,
img.lazyloading {
  opacity: 0;
  transition: opacity 0.4s ease;
}

img.lazyloaded {
  opacity: 1;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Poppins", Arial, sans-serif;
  color: var(--white);
  background: var(--navy);
}

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

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

button {
  font: inherit;
}

.container {
  width: min(calc(100% - 64px), var(--max));
  margin-inline: auto;
}

.site-header {
  position: fixed;
  z-index: 1000;
  inset: 0 0 auto;
  height: 100px;
  background: rgba(0, 7, 25, .82);
  backdrop-filter: blur(1px);
}

.nav-wrap {
  width: min(calc(100% - 80px), 1290px);
  height: 100px;
  min-height: 100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 48px;
}

.brand {
  width: 180px;
  flex: 0 0 180px;
  display: flex;
  align-items: center;
}

.brand img {
  width: 180px;
  height: auto;
  display: block;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex: 1;
  gap: 20px;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-btn {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  border-radius: 8px;
  background: var(--cyan);
  color: #00102b;
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.nav-btn:hover,
.nav-btn:focus {
  background: #13f4f0;
  color: #00102b;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 230, 235, 0.3);
}

.nav-link {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  transition: color 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.nav-link:hover,
.nav-link:focus {
  color: #ffffff;
}

.menu-toggle {
  display: none;
  background: none;
  border: 0;
  padding: 10px;
  margin-left: auto;
}

.menu-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: white;
  margin: 5px;
}

.section-stars {
  position: relative;
  overflow: hidden;
  background-color: #00143f;
  background-image: url("/assets/img/bg_top.jpg");
  background-position: center top;
  background-size: 100% auto;
  background-repeat: no-repeat;
}

.section-stars::before {
  content: none;
}

.hero {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 100px 0 40px;
  text-align: center;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1000px;
  margin-top: 100px;
}

.hero h1 {
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 400;
  margin: 0;
}

.hero h1 span,
.about-content h2 span {
  color: var(--cyan);
}

.hero h2 {
  color: var(--cyan);
  font-size: clamp(23px, 2.6vw, 34px);
  margin: 4px 0 0;
}

.hero-subtitle {
  font-size: clamp(22px, 2.2vw, 31px);
  margin: 0 0 28px;
}

.hero-copy {
  max-width: 900px;
  margin: auto;
  font-size: 18px;
  line-height: 1.5;
}

.hero-register {
  margin-top: 135px;
  padding-top: 20px;
  border-top: 2px dotted rgba(255, 255, 255, .42);
  width: 400px;
  margin-inline: auto;
}

.btn {
  display: inline-block;
  padding: 18px 72px;
  font-size: 25px;
  font-weight: 700;
}

.btn-primary {
  background: var(--blue);
  color: var(--cyan);
}

.about-intro {
  min-height: 760px;
  background: linear-gradient(90deg, var(--navy) 0 54%, #fff 54%);
}

.about-intro-grid {
  display: grid;
  grid-template-columns: 54% 46%;
  min-height: 760px;
}

.about-intro-grid>div:first-child {
  padding: 80px 70px 60px 0;
}

.section-title {
  margin: 0;
  font-size: 36px;
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: .3px;
}

.white {
  color: white;
}

.dark {
  color: var(--text);
}

.date-block {
  margin-top: 190px;
  max-width: 560px;
}

.date-block strong {
  color: var(--cyan);
  font-size: 27px;
  line-height: 1.3;
  display: block;
  word-break: break-word;
  overflow-wrap: break-word;
}

.date-block p {
  font-size: 18px;
  line-height: 1.45;
}

.date-block iframe {
  width: 100% !important;
  max-width: 100% !important;
  height: 420px;
  border-radius: 14px;
  border: 1px solid rgba(0, 230, 235, 0.3);
  margin-top: 20px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

.about-visual {
  display: grid;
  place-items: center;
  overflow: hidden;
}

.about-visual span {
  color: #f0f0f0;
  font-size: 150px;
  font-weight: 800;
  transform: rotate(-90deg);
  opacity: .9;
}

.about-content {
  padding: 70px 0 55px;
  background:
    linear-gradient(180deg, rgba(1, 25, 76, .94), rgba(0, 58, 128, .76)),
    radial-gradient(circle at 20% 100%, #50b8e8, transparent 45%);
}

.about-content h2 {
  font-size: 38px;
  font-weight: 400;
  margin: 0;
}

.about-content h3 {
  font-size: 18px;
  font-weight: 400;
  margin: 0 0 25px;
}

.about-content h3 b {
  color: var(--cyan);
}

.about-content p {
  font-size: 16px;
  line-height: 1.5;
}

.pillars-section {
  margin-top: 70px;
  padding-top: 40px;
  border-top: 2px dotted rgba(255, 255, 255, 0.3);
}

.about-content .pillars-title,
.pillars-title {
  font-size: 38px;
  font-weight: 700;
  color: var(--cyan);
  margin: 0 0 50px 0;
  letter-spacing: 0.5px;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.pillar-card {
  background: rgba(0, 19, 63, 0.75);
  border: 1px solid rgba(0, 230, 235, 0.25);
  border-radius: 16px;
  padding: 24px 20px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.pillar-card:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
  box-shadow: 0 8px 24px rgba(0, 230, 235, 0.18);
}

.pillar-card h4 {
  color: var(--cyan);
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 10px;
  line-height: 1.35;
}

.pillar-card p {
  color: #d0e8ff;
  font-size: 13px;
  line-height: 1.5;
  margin: 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 25px;
  margin-top: 70px;
}

.stats-grid>div {
  background: var(--blue);
  border-radius: 18px;
  padding: 24px 12px;
  text-align: center;
}

.stats-grid strong {
  display: block;
  color: var(--cyan);
  font-size: 27px;
  line-height: 1;
}

.stats-grid span {
  display: block;
  color: var(--cyan);
  font-size: 12px;
  margin-top: 6px;
}

.section-blue {
  background: linear-gradient(180deg, #94d0e8, #4c82cf);
  color: var(--text);
  padding: 90px 0;
}

.session-group-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--navy);
  margin: 45px 0 20px;
  padding-bottom: 6px;
  border-bottom: 3px solid var(--navy);
  display: inline-block;
  letter-spacing: 0.5px;
}

.session-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 15px 0 45px;
}

.session-card {
  min-height: 140px;
  background: var(--navy);
  color: var(--cyan);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 24px 30px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.session-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 19, 63, 0.25);
}

.session-card-info {
  flex: 1;
  padding-right: 15px;
}

.session-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--cyan);
  line-height: 1.25;
}

.session-topic {
  font-size: 14px;
  font-weight: 600;
  color: #ffffff;
  margin: 6px 0 8px;
  line-height: 1.35;
}

.session-speakers {
  font-size: 13px;
  color: #b0e8fd;
  margin: 6px 0 10px;
  line-height: 1.4;
}

.session-speakers ul {
  margin: 4px 0 0;
  padding-left: 18px;
}

.session-speakers li {
  margin-bottom: 3px;
}

.session-time {
  font-size: 12px;
  font-weight: 600;
  color: var(--cyan);
  display: inline-block;
  background: rgba(0, 230, 235, 0.12);
  padding: 5px 12px;
  border-radius: 4px;
  margin-top: 8px;
}

.session-card>strong {
  font-size: 48px;
  font-weight: 800;
  line-height: 1;
  color: rgba(0, 230, 235, 0.35);
  flex-shrink: 0;
}

.subsection-title {
  font-size: 34px;
  margin: 0 0 35px;
}

.speaker-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.speaker {
  position: relative;
  min-height: 282px;
  background: var(--navy);
  overflow: hidden;
}

.speaker img {
  width: 100%;
  height: 282px;
  object-fit: contain;
  object-position: center bottom;
}

.speaker>div {
  position: absolute;
  inset: auto 0 0;
  background: rgba(0, 8, 35, .88);
  padding: 10px 8px;
  text-align: center;
}

.speaker b {
  display: block;
  color: var(--cyan);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 6px;
}

.speaker span {
  display: block;
  color: #b0e8ff;
  font-size: 11px;
  line-height: 1.3;
}

.gallery {
  margin-top: 90px;
}

.gallery-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 25px;
}

.gallery-tabs button {
  border: 1px solid rgba(0, 230, 235, 0.3);
  background: var(--navy);
  color: var(--cyan);
  padding: 18px 12px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.gallery-tabs button.active-tab,
.gallery-tabs button:hover {
  background: var(--cyan);
  color: #00102b;
  border-color: var(--cyan);
}

.gallery-preview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.gallery-card-preview {
  display: block;
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  background: var(--navy);
  border: 1px solid rgba(0, 230, 235, 0.2);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  text-decoration: none;
}

.gallery-card-preview:hover {
  transform: translateY(-6px);
  border-color: var(--cyan);
  box-shadow: 0 12px 30px rgba(0, 230, 235, 0.2);
}

.gallery-card-preview img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.gallery-card-preview:hover img {
  transform: scale(1.06);
}

.gallery-card-info {
  padding: 16px;
  background: rgba(0, 16, 45, 0.95);
}

.gallery-card-info h3 {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan);
}

.gallery-card-info p {
  margin: 4px 0 0;
  font-size: 12px;
  color: #d0e8ff;
}

.gallery-all-btn-wrap {
  text-align: center;
  margin-top: 40px;
}

.btn-gallery {
  display: inline-block;
  padding: 14px 36px;
  background: transparent;
  color: var(--cyan);
  border: 2px solid var(--cyan);
  border-radius: 30px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn-gallery:hover {
  background: var(--cyan);
  color: #00102b;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 230, 235, 0.3);
}

/* Standalone Gallery Page */
.gallery-page {
  padding-top: 0;
}

.gallery-hero {
  padding: 140px 0 60px;
  text-align: center;
}

.back-link {
  display: inline-block;
  margin-top: 20px;
  color: var(--cyan);
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.back-link:hover {
  opacity: 0.8;
}

.gallery-full-container {
  padding: 60px 0 100px;
  background: linear-gradient(180deg, var(--navy) 0%, #001b44 100%);
}

.year-section {
  margin-bottom: 70px;
}

.year-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 25px;
  padding-bottom: 12px;
  border-bottom: 2px solid rgba(0, 230, 235, 0.3);
}

.year-header h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--cyan);
  margin: 0;
}

.year-badge {
  background: rgba(0, 230, 235, 0.15);
  color: var(--cyan);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
}

.gallery-photo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.photo-item {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  height: 220px;
  background: #000d24;
}

.photo-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.photo-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 19, 63, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.photo-overlay span {
  color: var(--cyan);
  font-weight: 700;
  font-size: 14px;
  border: 1px solid var(--cyan);
  padding: 8px 18px;
  border-radius: 20px;
}

.photo-item:hover img {
  transform: scale(1.08);
}

.photo-item:hover .photo-overlay {
  opacity: 1;
}

/* Lightbox Styles */
.lightbox-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 10, 28, 0.95);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.lightbox-modal.is-active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-content img {
  max-width: 90vw;
  max-height: 75vh;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
}

.lightbox-caption {
  margin-top: 14px;
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  text-align: center;
}

.lightbox-counter {
  margin-top: 6px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 500;
}

.lightbox-close {
  position: absolute;
  top: 25px;
  right: 30px;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 40px;
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s ease;
}

.lightbox-close:hover {
  color: var(--cyan);
}

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 230, 235, 0.15);
  border: 1px solid rgba(0, 230, 235, 0.3);
  color: var(--cyan);
  font-size: 48px;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.lightbox-prev {
  left: 30px;
}

.lightbox-next {
  right: 30px;
}

/* FAQ Section Styles */
.faq-section {
  padding: 90px 0;
  background: linear-gradient(180deg, var(--navy) 0%, #00132b 100%);
  position: relative;
}

.faq-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 50px;
}

.faq-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0, 230, 235, 0.1);
  border: 1px solid rgba(0, 230, 235, 0.35);
  border-radius: 20px;
  color: var(--cyan);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  margin-bottom: 16px;
  text-transform: uppercase;
  box-shadow: 0 0 15px rgba(0, 230, 235, 0.15);
}

.faq-title {
  font-size: 38px;
  font-weight: 800;
  color: #ffffff;
  margin: 0 0 14px;
  letter-spacing: -0.5px;
}

.faq-subtitle {
  font-size: 15px;
  color: #a0c4e8;
  margin: 0;
  line-height: 1.5;
}

.faq-accordion {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: rgba(0, 16, 43, 0.85);
  border: 1px solid rgba(0, 230, 235, 0.18);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-item:hover,
.faq-item.active {
  border-color: rgba(0, 230, 235, 0.5);
  background: rgba(0, 20, 52, 0.95);
  box-shadow: 0 6px 25px rgba(0, 230, 235, 0.12);
}

.faq-question {
  width: 100%;
  padding: 22px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  border: none;
  color: #ffffff;
  font-family: inherit;
  font-size: 17px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  gap: 16px;
  outline: none;
}

.faq-chevron {
  color: var(--cyan);
  flex-shrink: 0;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-item.active .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-item.active .faq-answer {
  grid-template-rows: 1fr;
}

.faq-answer-inner {
  overflow: hidden;
  padding: 0 26px;
  border-top: 1px solid transparent;
  color: #c4d9f2;
  font-size: 14.5px;
  line-height: 1.65;
  transition: padding 0.35s ease, border-color 0.35s ease, opacity 0.35s ease;
  opacity: 0;
}

.faq-item.active .faq-answer-inner {
  padding: 16px 26px 22px 26px;
  border-top-color: rgba(255, 255, 255, 0.08);
  opacity: 1;
}

/* Scroll to Top Button */
.scroll-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(0, 16, 43, 0.88);
  border: 1.5px solid rgba(0, 230, 235, 0.4);
  color: var(--cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  outline: none;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.scroll-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-to-top:hover {
  background: var(--cyan);
  color: #00102b;
  border-color: var(--cyan);
  box-shadow: 0 0 25px rgba(0, 230, 235, 0.6);
  transform: translateY(-3px);
}

.sponsors {
  min-height: 470px;
  padding: 70px 0;
  background:
    radial-gradient(ellipse at 50% 40%, rgba(0, 210, 255, .55), transparent 45%),
    linear-gradient(180deg, #062d59, #001326);
}

.supported {
  text-align: center;
  margin: 45px 0 15px;
  font-size: 16px;
  opacity: .9;
}

.sponsor-main-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 60px;
  margin: 40px 0 50px;
}

.sponsor-item {
  display: flex;
  align-items: center;
  justify-content: center;
}

.sponsor-large img {
  height: 165px;
  max-height: 165px;
  width: auto;
  object-fit: contain;
  filter: brightness(1.1);
}

.sponsor-medium img {
  height: 72px;
  max-height: 72px;
  width: auto;
  object-fit: contain;
  filter: brightness(1.1);
}

.sponsor-grid-small {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 35px 55px;
  max-width: 1100px;
  margin: 0 auto 35px;
}

.sponsor-small img {
  height: 45px;
  max-height: 45px;
  width: auto;
  object-fit: contain;
  filter: brightness(1.1);
}

.sponsor-small span {
  color: white;
  font-weight: 700;
  font-size: 38px;
  letter-spacing: 0.5px;
}

.sponsor-grid-xs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 25px 45px;
  max-width: 700px;
  margin: 0 auto;
}

.sponsor-xs img {
  height: 40px;
  max-height: 40px;
  width: auto;
  object-fit: contain;
  filter: brightness(1.1);
}

.footer {
  background: #001022;
  padding: 55px 0 30px;
  color: #fff;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
}

.footer h4 {
  color: var(--cyan);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin: 24px 0 8px;
}

.footer h4:first-child {
  margin-top: 0;
}

.footer p,
.footer strong {
  font-size: 14px;
  line-height: 1.6;
}

.footer-bottom {
  width: min(calc(100% - 64px), var(--max));
  margin: 55px auto 0;
  text-align: right;
  font-size: 12px;
  opacity: .85;
}

@media (max-width: 1050px) {
  .nav-left {
    gap: 8px;
  }

  .nav-right {
    gap: 18px;
  }

  .nav-btn {
    padding: 0 16px;
    font-size: 11px;
    min-height: 42px;
  }

  .nav-link {
    font-size: 11px;
  }

  .nav-wrap {
    gap: 20px;
  }

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

@media (max-width: 760px) {
  .container {
    width: min(calc(100% - 36px), var(--max));
  }

  .nav-wrap {
    min-height: 76px;
    height: 76px;
    width: min(calc(100% - 36px), var(--max));
  }

  .brand {
    width: 150px;
    flex-basis: 150px;
  }

  .brand img {
    width: 150px;
  }

  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 76px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: rgba(0, 10, 35, .98);
    padding: 16px 20px 24px;
    gap: 16px;
  }

  .main-nav.is-open {
    display: flex;
  }

  .nav-left,
  .nav-right {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    width: 100%;
  }

  .nav-right {
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, .15);
  }

  .nav-btn {
    width: 100%;
    text-align: center;
    padding: 14px;
    min-height: 44px;
  }

  .nav-link {
    width: 100%;
    text-align: center;
    padding: 12px;
  }

  .hero {
    min-height: 760px;
    padding-top: 100px;
  }

  .hero-register {
    margin-top: 70px;
  }

  .btn {
    padding: 15px 55px;
    font-size: 20px;
  }

  .about-intro {
    background: var(--navy);
  }

  .about-intro-grid {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .about-intro-grid>div:first-child {
    padding: 65px 0;
  }

  .date-block {
    margin-top: 40px;
  }

  .date-block strong {
    font-size: 20px;
    line-height: 1.35;
  }

  .date-block p {
    font-size: 14px;
    line-height: 1.4;
  }

  .date-block iframe {
    height: 220px;
  }

  .about-visual {
    min-height: 260px;
    background: white;
  }

  .about-visual span {
    font-size: 90px;
  }

  .about-content h2 {
    font-size: 28px;
  }

  .pillars-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 50px;
  }

  .session-group-title {
    font-size: 22px;
    margin: 30px 0 15px;
  }

  .session-grid {
    grid-template-columns: 1fr;
    gap: 14px;
    margin-bottom: 40px;
  }

  .session-card {
    min-height: auto;
    padding: 18px 20px;
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  }

  .session-card h3 {
    font-size: 17px;
  }

  .session-card>strong {
    font-size: 36px;
  }

  .speaker-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .speaker {
    min-height: 228px;
  }

  .speaker img {
    height: 228px;
  }

  .gallery-preview-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .gallery-card-preview img {
    height: 140px;
  }

  .gallery-card-info {
    padding: 10px;
  }

  .gallery-card-info h3 {
    font-size: 12px;
    line-height: 1.25;
  }

  .gallery-card-info p {
    font-size: 10px;
  }

  .gallery-tabs {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .gallery-grid div:last-child {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  /* Mobile FAQ Styles */
  .faq-section {
    padding: 60px 0;
  }

  .faq-header {
    margin-bottom: 35px;
  }

  .faq-title {
    font-size: 28px;
  }

  .faq-question {
    padding: 18px 20px;
    font-size: 15px;
  }

  .faq-answer-inner {
    font-size: 13.5px;
  }

  .faq-item.active .faq-answer-inner {
    padding: 14px 20px 18px 20px;
  }

  .sponsor-main-row {
    flex-direction: row;
    gap: 24px;
    margin: 18px 0 24px;
  }

  .sponsor-large img {
    height: 86px;
    max-height: 86px;
  }

  .sponsor-medium img {
    height: 50px;
    max-height: 50px;
  }

  .sponsor-medium span {
    font-size: 28px;
  }

  .sponsor-grid-small {
    gap: 18px 28px;
    margin-bottom: 24px;
  }

  .sponsor-small img {
    height: 35px;
    max-height: 35px;
  }

  .sponsor-small span {
    font-size: 25px;
  }

  .sponsor-grid-xs {
    gap: 16px 24px;
  }

  .sponsor-xs img {
    height: 25px;
    max-height: 25px;
  }

  .sponsor-xs span {
    font-size: 19px;
  }
}

@media (max-width: 420px) {
  .site-header {
    height: 80px;
  }

  .hero h1 {
    font-size: 30px;
  }

  .hero h2 {
    font-size: 22px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .hero-copy,
  .about-content p,
  .date-block p {
    font-size: 14px;
  }

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

  .stats-grid strong {
    font-size: 21px;
  }

  .stats-grid span {
    font-size: 9px;
  }

  .section-title {
    font-size: 30px;
  }

  .sponsor-main-row {
    gap: 16px;
    margin: 14px 0 18px;
  }

  .sponsor-large img {
    height: 90px;
    max-height: 90px;
  }

  .sponsor-medium img {
    height: 45px;
    max-height: 45px;
  }

  .sponsor-small img {
    height: 28px;
    max-height: 28px;
  }

  .sponsor-xs img {
    height: 22px;
    max-height: 22px;
  }
}