:root {
  --ink: #171714;
  --muted: #5d5b51;
  --paper: #f3f1e5;
  --yellow: #e7d613;
  --charcoal: #262621;
  --deep-red: #8a2f24;
  --line: rgba(23, 23, 20, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Georgia, "Times New Roman", serif;
}

a {
  color: inherit;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 56px);
  color: #fff;
  background: rgba(15, 15, 13, 0.72);
  backdrop-filter: blur(14px);
}

.brand {
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
}

nav {
  display: flex;
  gap: clamp(12px, 3vw, 34px);
  font-family: Arial, sans-serif;
  font-size: 0.88rem;
}

nav a {
  text-decoration: none;
}

.hero {
  position: relative;
  min-height: 94vh;
  overflow: hidden;
  display: grid;
  align-items: end;
  padding: 120px clamp(18px, 7vw, 96px) 72px;
  color: #fff;
  background: #111;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.76), rgba(0, 0, 0, 0.22) 55%, rgba(231, 214, 19, 0.28));
}

.hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1);
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.hero-copy p,
.eyebrow {
  margin: 0 0 12px;
  font-family: Arial, sans-serif;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  line-height: 0.96;
}

h1 {
  font-size: clamp(4.2rem, 11vw, 10.5rem);
}

.hero h2 {
  margin-top: 14px;
  font-size: clamp(1.5rem, 4vw, 3.4rem);
  font-style: italic;
}

.hero-actions,
.register-copy .button {
  margin-top: 30px;
}

.button,
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  font-family: Arial, sans-serif;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}

.button.primary,
button {
  color: #111;
  background: var(--yellow);
}

.button.ghost {
  margin-left: 10px;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.08);
}

.dates {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.dates div {
  padding: 24px clamp(18px, 4vw, 48px);
  border-right: 1px solid var(--line);
}

.dates span {
  display: block;
  color: var(--muted);
  font-family: Arial, sans-serif;
  font-size: 0.84rem;
  text-transform: uppercase;
}

.dates strong {
  display: block;
  margin-top: 8px;
  font-size: clamp(1.35rem, 2vw, 2rem);
}

.split-section,
.register-section,
.themes-section,
.contact-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.85fr) minmax(320px, 1.15fr);
  gap: clamp(28px, 5vw, 72px);
  padding: clamp(56px, 8vw, 110px) clamp(18px, 6vw, 86px);
}

.section-copy h2,
.register-copy h2,
.themes-copy h2,
.contact-section h2 {
  font-size: clamp(2.4rem, 5vw, 5rem);
}

.themes-copy .eyebrow {
  font-size: clamp(1.4rem, 2.2vw, 2rem);
  font-weight: 900;
}

.section-copy p:not(.eyebrow),
.register-copy p,
.themes-copy p,
.committee p {
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.55;
}

.call-details {
  display: grid;
  gap: 8px;
  margin-top: 22px;
  padding: 22px 24px;
  border-left: 5px solid var(--yellow);
  background: rgba(255, 210, 63, 0.12);
}

.call-details p {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(1.05rem, 1.55vw, 1.28rem);
  line-height: 1.35;
}

.call-details span {
  font-family: Arial, sans-serif;
  font-weight: 800;
}

.call-details strong {
  color: var(--ink);
  font-weight: 900;
}

.hanging-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px 18px;
}

.hanging-grid span {
  position: relative;
  min-height: 116px;
  display: grid;
  place-items: center;
  padding: 20px;
  text-align: center;
  color: #fff;
  background-image: linear-gradient(rgba(20, 20, 18, 0.56), rgba(20, 20, 18, 0.64)), url("assets/image-5.png");
  background-size: auto, 400% 300%;
  background-position: center, 0 0;
  box-shadow: 0 18px 34px rgba(20, 20, 18, 0.18);
  font-size: clamp(1rem, 1.7vw, 1.45rem);
  font-weight: 800;
}

.hanging-grid span:nth-child(2) {
  background-position: center, 33.333% 0;
}

.hanging-grid span:nth-child(3) {
  background-position: center, 66.666% 0;
}

.hanging-grid span:nth-child(4) {
  background-position: center, 100% 0;
}

.hanging-grid span:nth-child(5) {
  background-position: center, 0 50%;
}

.hanging-grid span:nth-child(6) {
  background-position: center, 33.333% 50%;
}

.hanging-grid span:nth-child(7) {
  background-position: center, 66.666% 50%;
}

.hanging-grid span:nth-child(8) {
  background-position: center, 100% 50%;
}

.hanging-grid span:nth-child(9) {
  background-position: center, 0 100%;
}

.hanging-grid span:nth-child(10) {
  background-position: center, 33.333% 100%;
}

.hanging-grid span:nth-child(11) {
  background-position: center, 66.666% 100%;
}

.hanging-grid span:nth-child(12) {
  background-position: center, 100% 100%;
}

.hanging-grid span::before {
  content: "";
  position: absolute;
  top: -20px;
  left: 50%;
  width: 2px;
  height: 20px;
  background: var(--ink);
}

.hanging-grid span::after {
  content: "";
  position: absolute;
  top: -7px;
  left: calc(50% - 7px);
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--yellow);
}

.register-section {
  color: #fff;
  background: var(--charcoal);
}

.register-copy p {
  color: rgba(255, 255, 255, 0.76);
}

.registration-image {
  min-height: 430px;
  margin: 0;
  overflow: hidden;
  box-shadow: 0 24px 46px rgba(0, 0, 0, 0.28);
}

.registration-image img {
  width: 100%;
  height: 100%;
  min-height: inherit;
  display: block;
  object-fit: cover;
  object-position: center;
  filter: contrast(1.06);
}

.registration-form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  padding: clamp(20px, 4vw, 34px);
  color: var(--ink);
  background: #fff;
}

label {
  display: grid;
  gap: 8px;
  font-family: Arial, sans-serif;
  font-weight: 700;
}

label:last-of-type {
  grid-column: 1 / -1;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  padding: 13px 12px;
  font: 1rem Arial, sans-serif;
  background: #f8f7ef;
}

button {
  grid-column: 1 / -1;
  justify-self: start;
  width: auto;
  border: 0;
  padding: 14px 28px;
}

.themes-section {
  align-items: start;
  background: #fff;
  grid-template-columns: minmax(320px, 0.9fr) minmax(320px, 0.65fr);
}

.themes-image {
  position: sticky;
  top: 110px;
  min-height: 680px;
  margin: 0;
  overflow: hidden;
  background: var(--charcoal);
  box-shadow: 0 26px 52px rgba(20, 20, 18, 0.18);
}

.themes-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255, 210, 63, 0.08), rgba(20, 20, 18, 0.28)),
    linear-gradient(90deg, rgba(20, 20, 18, 0.06), rgba(20, 20, 18, 0.48));
  pointer-events: none;
}

.themes-image img {
  width: 100%;
  height: 100%;
  min-height: inherit;
  display: block;
  object-fit: cover;
  object-position: 28% center;
  filter: grayscale(100%) contrast(1.06) sepia(0.1);
}

.themes-copy h3 {
  margin-top: 34px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.55rem, 2.5vw, 2.25rem);
}

.theme-list {
  margin: 22px 0;
  padding-left: 24px;
  font-size: 1.1rem;
  line-height: 1.5;
}

.theme-list li + li {
  margin-top: 22px;
}

.theme-list strong {
  display: block;
  color: var(--ink);
  font-size: 1.18rem;
  line-height: 1.35;
}

.theme-list p {
  margin: 8px 0 0;
}

.highlight {
  padding: 18px;
  border-left: 8px solid var(--yellow);
  background: #f6f2c5;
}

.faq-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.7fr) minmax(320px, 1.3fr);
  gap: clamp(28px, 5vw, 72px);
  padding: clamp(56px, 8vw, 100px) clamp(18px, 6vw, 86px);
  background: var(--paper);
}

.faq-heading h2 {
  margin: 0;
  font-size: clamp(2.2rem, 4.6vw, 4.6rem);
  line-height: 0.98;
}

.faq-heading .eyebrow {
  font-size: clamp(1.35rem, 2.1vw, 2rem);
  font-weight: 900;
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-list details {
  border: 1px solid var(--line);
  background: #fff;
}

.faq-list summary {
  cursor: pointer;
  padding: 18px 22px;
  font-family: Arial, sans-serif;
  font-size: clamp(1rem, 1.4vw, 1.18rem);
  font-weight: 800;
  list-style: none;
}

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

.faq-list summary::after {
  content: "+";
  float: right;
  color: var(--deep-red);
  font-size: 1.35rem;
  line-height: 1;
}

.faq-list details[open] summary::after {
  content: "-";
}

.faq-list p {
  margin: 0;
  padding: 0 22px 20px;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.55;
}

.contact-section {
  grid-template-columns: 0.9fr 1.1fr;
  color: #fff;
  background: linear-gradient(rgba(20, 20, 18, 0.82), rgba(20, 20, 18, 0.82)), url("assets/page-1.jpg") center/cover;
}

.contact-section p {
  font-size: 1.2rem;
}

.contact-line {
  display: flex;
  align-items: center;
  gap: 12px;
}

.contact-line svg {
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  fill: none;
  stroke: var(--yellow);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.committee {
  border-left: 1px solid rgba(255, 255, 255, 0.25);
  padding-left: clamp(20px, 4vw, 42px);
}

.committee p {
  margin: 0 0 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.35;
}

.committee p:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: 0;
}

.committee .role {
  display: block;
  margin-bottom: 3px;
  color: var(--yellow);
  font-family: Arial, sans-serif;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.committee strong {
  display: block;
  color: #fff;
  font-size: clamp(1.15rem, 1.8vw, 1.45rem);
  font-weight: 900;
}

.committee .designation {
  display: block;
  margin-top: 2px;
  color: rgba(255, 255, 255, 0.7);
  font-family: Arial, sans-serif;
  font-size: clamp(0.9rem, 1.1vw, 1rem);
  font-weight: 400;
}

@media (max-width: 860px) {
  .site-header,
  nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .dates,
  .split-section,
  .register-section,
  .themes-section,
  .faq-section,
  .contact-section,
  .registration-form {
    grid-template-columns: 1fr;
  }

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

  .themes-image {
    position: relative;
    top: auto;
    min-height: 360px;
  }

  .button.ghost {
    margin: 12px 0 0;
  }

  .committee {
    border-left: 0;
    padding-left: 0;
  }
}

@media (max-width: 520px) {
  .hero {
    min-height: 88vh;
  }

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