/* Mountain Study — shared responsive layout */
:root {
  --accent: #f4c050;
  --accent-dark: #e0a830;
  --ink: #1a1a1a;
  --muted: #5a5a5a;
  --line: #e5e5e5;
  --bg: #f7f7f5;
  --panel: #ffffff;
  --sidebar-bg: #efefef;
  --max: 1120px;
  --header-h: 72px;
  --radius: 8px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  width: 100%;
}

img,
video,
iframe,
svg {
  max-width: 100%;
  height: auto;
}

img {
  display: block;
}

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

button {
  font: inherit;
  cursor: pointer;
  border: 0;
  background: none;
}

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.site-header__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
  width: 100%;
}

.site-logos {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.site-logos img {
  height: 40px;
  width: auto;
}

.site-logos img:first-child {
  height: 48px;
}

.site-nav {
  display: none;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a,
.site-nav .nav-parent {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--ink);
  border-radius: 4px;
  transition: background 0.15s ease;
}

.site-nav a:hover,
.site-nav .nav-parent:hover,
.site-nav a.is-active {
  background: var(--accent);
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown__menu {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 220px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  padding: 0.35rem;
  z-index: 50;
}

.nav-dropdown.is-open .nav-dropdown__menu {
  display: block;
}

.nav-dropdown__menu a {
  display: block;
  width: 100%;
  padding: 0.55rem 0.75rem;
  font-size: 0.75rem;
  border-radius: 4px;
}

.nav-dropdown__menu a:hover {
  background: #f3f3f3;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
}

.social-links {
  display: none;
  align-items: center;
  gap: 0.4rem;
}

.social-links a {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.social-links svg {
  width: 12px;
  height: 12px;
  fill: currentColor;
}

.lang-switch {
  display: flex;
  gap: 0.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.lang-switch a {
  padding: 0.25rem 0.45rem;
  border-radius: 4px;
}

.lang-switch a.is-active {
  background: var(--accent);
}

.burger {
  width: 42px;
  height: 42px;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
}

.burger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.burger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.burger.is-open span:nth-child(2) {
  opacity: 0;
}

.burger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* —— Mobile drawer —— */
.mobile-drawer {
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
  visibility: hidden;
}

.mobile-drawer.is-open {
  pointer-events: auto;
  visibility: visible;
}

.mobile-drawer__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.mobile-drawer.is-open .mobile-drawer__backdrop {
  opacity: 1;
}

.mobile-drawer__panel {
  position: absolute;
  top: 0;
  right: 0;
  width: min(320px, 88vw);
  height: 100%;
  background: #fff;
  transform: translateX(100%);
  transition: transform 0.28s ease;
  padding: 1.25rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.mobile-drawer.is-open .mobile-drawer__panel {
  transform: translateX(0);
}

.mobile-drawer__close {
  align-self: flex-end;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--line);
  font-size: 1.25rem;
  line-height: 1;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mobile-nav a,
.mobile-nav button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.85rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  border-radius: 6px;
  color: var(--ink);
}

.mobile-nav a:hover,
.mobile-nav a.is-active,
.mobile-nav button:hover {
  background: var(--accent);
}

.mobile-sub {
  display: none;
  flex-direction: column;
  padding-left: 0.75rem;
  margin-bottom: 0.35rem;
}

.mobile-sub.is-open {
  display: flex;
}

.mobile-sub a {
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: none;
  padding: 0.55rem 0.9rem;
}

.mobile-side {
  border-top: 1px solid var(--line);
  padding-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.mobile-side a {
  padding: 0.65rem 0.9rem;
  font-size: 0.85rem;
  border-radius: 6px;
}

.mobile-side a.is-active {
  background: var(--accent);
  font-weight: 600;
}

.mobile-meta {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.mobile-meta .social-links {
  display: flex;
}

/* —— Hero —— */
.site-hero {
  position: relative;
  min-height: clamp(220px, 42vw, 380px);
  display: flex;
  align-items: center;
  justify-content: center;
  background: #2c3a45 center / cover no-repeat;
  color: #fff;
  text-align: center;
}

.site-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.35), rgba(0, 0, 0, 0.55));
}

.site-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 820px;
  padding: 2.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.site-hero__title {
  margin: 0;
  font-size: clamp(1.25rem, 3.2vw, 2rem);
  font-weight: 700;
  line-height: 1.3;
  text-wrap: balance;
}

.site-hero__countdown {
  display: inline-block;
  background: var(--accent);
  color: var(--ink);
  font-weight: 700;
  font-size: clamp(0.95rem, 2.2vw, 1.35rem);
  padding: 0.45rem 0.9rem;
  border-radius: 4px;
  letter-spacing: 0.02em;
}

.site-hero__date {
  display: inline-block;
  background: var(--accent);
  color: var(--ink);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
}

.site-hero__start {
  margin: 0;
  font-size: 0.95rem;
  opacity: 0.95;
}

/* —— Layout shell —— */
.site-main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.25rem;
}

.site-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  align-items: start;
}

.site-sidebar {
  display: none;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.5rem;
  position: sticky;
  top: calc(var(--header-h) + 12px);
}

.site-sidebar a {
  display: block;
  padding: 0.7rem 0.85rem;
  margin-bottom: 2px;
  background: var(--sidebar-bg);
  border-radius: 4px;
  font-size: 0.88rem;
  transition: background 0.15s ease;
}

.site-sidebar a:hover,
.site-sidebar a.is-active {
  background: var(--accent);
  font-weight: 600;
}

.site-content {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1rem, 3vw, 1.75rem);
  min-width: 0;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.site-content table {
  display: block;
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.site-content iframe {
  width: 100% !important;
  max-width: 100%;
}

.site-content pre,
.site-content code {
  white-space: pre-wrap;
  word-break: break-word;
}

.site-content h1,
.site-content h2,
.site-content h3 {
  line-height: 1.25;
  margin: 0 0 0.75rem;
}

.site-content h1 {
  font-size: clamp(1.35rem, 2.5vw, 1.85rem);
  max-width: none;
  width: auto;
}

.site-content h1 > span {
  background: none;
}

.site-content h2 {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--muted);
  font-weight: 600;
}

.site-content p {
  margin: 0 0 1rem;
  color: var(--ink);
}

.site-content a {
  color: #256ec7;
  font-weight: 600;
  text-decoration: underline;
}

.site-content figure {
  margin: 0 0 1.25rem;
}

.site-content figcaption {
  display: none;
}

.site-content img[style*="height"] {
  height: auto !important;
  max-height: 420px;
  width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

.section-title {
  font-size: clamp(1.2rem, 2.5vw, 1.75rem);
  font-weight: 700;
  text-align: center;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

/* —— Footer —— */
.site-footer {
  margin-top: 2rem;
  background: var(--accent);
}

.site-footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  font-size: 0.9rem;
}

.site-footer a {
  background: #fff;
  padding: 0.3rem 0.65rem;
  border-radius: 4px;
  font-weight: 600;
}

body.menu-locked {
  overflow: hidden;
}

/* —— Breakpoints —— */
@media (min-width: 768px) {
  .social-links {
    display: flex;
  }

  .site-logos img {
    height: 48px;
  }

  .site-logos img:first-child {
    height: 56px;
  }
}

@media (min-width: 980px) {
  .burger {
    display: none;
  }

  .site-nav {
    display: flex;
    flex: 1;
    justify-content: center;
  }

  .site-shell {
    grid-template-columns: 240px 1fr;
    gap: 1.5rem;
  }

  .site-shell.no-sidebar {
    grid-template-columns: 1fr;
  }

  .site-sidebar {
    display: block;
  }

  .mobile-drawer {
    display: none;
  }
}

@media (max-width: 979px) {
  .site-header__inner {
    padding: 0.65rem 1rem;
  }
}

/* Contact / misc page helpers */
.contact-page {
  display: grid;
  gap: 1.25rem;
}

.contact-card {
  background: #fafafa;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
}

.contact-page iframe {
  width: 100%;
  max-width: 100%;
  border: 0;
  border-radius: var(--radius);
}

.lead-center {
  text-align: center;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.75rem;
}

.gallery-item {
  display: block;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: var(--radius);
  background: #eee;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.gallery-item:hover img {
  transform: scale(1.05);
}

/* —— Simple lightbox —— */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.lightbox[hidden] {
  display: none !important;
}

.lightbox__img {
  max-width: min(96vw, 1100px);
  max-height: 88vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 6px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

.lightbox__close,
.lightbox__nav {
  position: absolute;
  border: 0;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  cursor: pointer;
  border-radius: 8px;
  line-height: 1;
}

.lightbox__close {
  top: 1rem;
  right: 1rem;
  width: 44px;
  height: 44px;
  font-size: 1.6rem;
}

.lightbox__nav {
  top: 50%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  font-size: 2rem;
}

.lightbox__prev {
  left: 0.75rem;
}

.lightbox__next {
  right: 0.75rem;
}

.lightbox__close:hover,
.lightbox__nav:hover {
  background: rgba(255, 255, 255, 0.22);
}

@media (max-width: 640px) {
  .lightbox__nav {
    width: 40px;
    height: 40px;
    font-size: 1.6rem;
  }

  .lightbox__prev {
    left: 0.35rem;
  }

  .lightbox__next {
    right: 0.35rem;
  }
}

@media (min-width: 640px) {
  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
  }
}

/* —— People / logo / sponsor grids —— */
.people-grid,
.logo-grid,
.sponsor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
  margin-top: 0.5rem;
}

@media (min-width: 640px) {
  .people-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.25rem;
  }

  .logo-grid,
  .sponsor-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  }
}

.person-card,
.logo-card {
  background: #fafafa;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.85rem;
  text-align: center;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.person-card:hover,
.logo-card:hover {
  border-color: #d0d0d0;
  transform: translateY(-2px);
}

.person-card__photo {
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border-radius: 6px;
  background: #ececec;
  margin-bottom: 0.75rem;
}

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

.person-card__name {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.3;
}

.person-card__role {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.4;
}

.logo-card__img {
  height: 110px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
  padding: 0.5rem;
}

.logo-card__img img {
  max-height: 100%;
  max-width: 100%;
  width: auto;
  object-fit: contain;
}

.logo-card__name {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
}

.empty-note {
  color: var(--muted);
  font-style: italic;
}

/* —— Forms —— */
.form-card {
  background: #fafafa;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1rem, 3vw, 1.5rem);
}

.form-grid {
  display: grid;
  gap: 0.85rem;
}

.form-field {
  display: grid;
  gap: 0.35rem;
}

.form-field label {
  font-size: 0.85rem;
  font-weight: 600;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid #d8d8d8;
  border-radius: 6px;
  background: #fff;
  font: inherit;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: 2px solid rgba(244, 192, 80, 0.55);
  border-color: var(--accent-dark);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 0.5rem;
  padding: 0.7rem 1.4rem;
  background: var(--accent);
  color: var(--ink);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: 6px;
  border: 0;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--accent-dark);
}

/* —— Content helpers —— */
.media-block {
  margin: 0 0 1.25rem;
  border-radius: var(--radius);
  overflow: hidden;
  background: #eee;
}

.media-block img,
.media-block video {
  width: 100%;
  display: block;
  max-height: 420px;
  object-fit: cover;
}

.media-block video {
  max-height: none;
  background: #111;
}

.list-clean {
  margin: 0 0 1rem;
  padding-left: 1.15rem;
}

.list-clean li {
  margin-bottom: 0.4rem;
}

.timeline {
  display: grid;
  gap: 0.65rem;
  margin: 1rem 0;
}

.timeline-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.2rem;
  padding: 0.85rem 1rem;
  background: #fafafa;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

@media (min-width: 560px) {
  .timeline-item {
    grid-template-columns: 160px 1fr;
    align-items: baseline;
  }
}

.timeline-item strong {
  font-size: 0.9rem;
}

.doc-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.85rem;
  background: var(--ink);
  color: #fff !important;
  text-decoration: none !important;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
}

.doc-link:hover {
  background: #333;
}

.event-card {
  display: grid;
  gap: 0.75rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fafafa;
  margin-bottom: 1rem;
}

.event-card img {
  width: 100%;
  max-height: 280px;
  object-fit: cover;
  border-radius: 6px;
}

.event-card h2 {
  margin: 0;
  font-size: 1.05rem;
  color: var(--ink);
}

.info-box {
  padding: 1rem 1.15rem;
  background: #fafafa;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.topic-list {
  display: grid;
  gap: 0.5rem;
  margin: 1rem 0 1.5rem;
}

.topic-list li {
  list-style: none;
  padding: 0.75rem 1rem;
  background: #fafafa;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-weight: 600;
}

.req-block {
  margin-bottom: 1.25rem;
}

.req-block h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.req-block p,
.req-block li {
  font-size: 0.95rem;
  color: var(--ink);
}

/* —— Mobile polish (all breakpoints) —— */
@media (max-width: 979px) {
  .site-header__inner {
    padding: 0.55rem 0.85rem;
    gap: 0.5rem;
    min-height: 60px;
  }

  .site-logos {
    gap: 0.4rem;
    max-width: calc(100% - 120px);
    min-width: 0;
  }

  .site-logos img {
    height: 34px;
    max-width: 42vw;
    object-fit: contain;
  }

  .site-logos img:first-child {
    height: 38px;
  }

  .site-header__actions {
    gap: 0.4rem;
  }

  .lang-switch {
    font-size: 0.7rem;
  }

  .burger {
    width: 40px;
    height: 40px;
  }

  .site-hero {
    min-height: 200px;
  }

  .site-hero__inner {
    padding: 1.5rem 1rem;
    gap: 0.75rem;
    width: 100%;
  }

  .site-hero__title {
    font-size: clamp(1.05rem, 4.5vw, 1.45rem);
  }

  .site-hero__countdown,
  .site-hero__date {
    max-width: 100%;
    font-size: 0.85rem;
    padding: 0.4rem 0.65rem;
    line-height: 1.3;
  }

  .site-hero__start {
    font-size: 0.85rem;
  }

  .site-main {
    padding: 0.85rem;
  }

  .site-content {
    padding: 0.95rem;
    border-radius: 6px;
  }

  .site-footer__inner {
    padding: 1.1rem 0.85rem;
    font-size: 0.85rem;
  }

  .people-grid,
  .logo-grid,
  .sponsor-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.55rem;
  }

  .doc-link {
    width: 100%;
    justify-content: center;
    text-align: center;
  }

  .btn-primary {
    width: 100%;
  }

  .mobile-drawer__panel {
    width: min(100vw - 48px, 320px);
    padding: 1rem;
  }
}

@media (max-width: 480px) {
  .site-logos img:nth-child(2) {
    display: none;
  }

  .lang-switch {
    display: none;
  }

  .people-grid,
  .logo-grid,
  .sponsor-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .person-card__photo {
    aspect-ratio: 1 / 1;
    max-width: 220px;
    margin-left: auto;
    margin-right: auto;
  }

  .logo-card__img {
    height: 96px;
  }

  .site-hero__countdown {
    font-size: 0.8rem;
    letter-spacing: 0;
  }

  .timeline-item {
    grid-template-columns: 1fr;
  }

  .topic-list {
    padding-left: 0;
  }

  .topic-list li {
    padding: 0.7rem 0.85rem;
    font-size: 0.9rem;
  }
}

@media (min-width: 481px) and (max-width: 639px) {
  .people-grid,
  .logo-grid,
  .sponsor-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}