@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Manrope:wght@500;600;700;800&display=swap");

:root {
  --navbar-background: rgba(4, 10, 24, 0.9);
  --navbar-background-scrolled: rgba(3, 9, 22, 0.97);
  --navbar-text: #ffffff;
  --navbar-muted: #9aa9c1;

  --conference-blue: #176bff;
  --conference-blue-light: #4d93ff;
  --conference-blue-dark: #0751ca;
  --conference-cyan: #45d6ff;

  --panel-background: #071124;
  --panel-surface: #0d1a31;
  --panel-border: rgba(255, 255, 255, 0.1);

  --navbar-height: 112px;
  --navbar-container-width: 1440px;

  --transition-fast: 180ms ease;
  --transition-normal: 320ms cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

body.navbar-menu-open {
  overflow: hidden;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  width: 100%;
  height: var(--navbar-height);
  color: var(--navbar-text);
  background: linear-gradient(
    180deg,
    rgba(2, 7, 18, 0.96) 0%,
    rgba(2, 7, 18, 0.76) 72%,
    rgba(2, 7, 18, 0) 100%
  );
  transition:
    background var(--transition-normal),
    box-shadow var(--transition-normal),
    height var(--transition-normal);
}

.site-header.is-scrolled {
  height: 76px;
  background: var(--navbar-background-scrolled);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  box-shadow: 0 16px 45px rgba(0, 0, 0, 0.22);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.navbar-container {
  width: min(calc(100% - 48px), var(--navbar-container-width));
  height: 100%;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(240px, 1fr) auto minmax(200px, 1fr);
  align-items: center;
  gap: 36px;
}

/* Logo */

.navbar-brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  width: max-content;
  color: inherit;
  text-decoration: none;
}

.navbar-logo {
  width: auto;
  height: 65px;
  object-fit: contain;
}

.navbar-brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.navbar-brand-name {
  font-family: "Manrope", sans-serif;
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
}

.navbar-brand-subtitle {
  color: var(--navbar-muted);
  font-family: "Inter", sans-serif;
  font-size: 10px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

/* Desktop navigation */

.desktop-navigation {
  height: 100%;
}

.navigation-list {
  height: 100%;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.navigation-item {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.navigation-link {
  position: relative;
  height: 100%;
  padding: 0 16px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 0;
  color: rgba(255, 255, 255, 0.78);
  background: transparent;
  font-family: "Inter", sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.navigation-link::after {
  position: absolute;
  right: 16px;
  bottom: 22px;
  left: 16px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(
    90deg,
    var(--conference-blue),
    var(--conference-cyan)
  );
  content: "";
  opacity: 0;
  transform: scaleX(0);
  transform-origin: center;
  transition:
    opacity var(--transition-fast),
    transform var(--transition-normal);
}

.site-header.is-scrolled .navigation-link::after {
  bottom: 15px;
}

.navigation-link:hover,
.navigation-link:focus-visible,
.navigation-link.is-active {
  color: #ffffff;
}

.navigation-link:hover::after,
.navigation-link:focus-visible::after,
.navigation-link.is-active::after {
  opacity: 1;
  transform: scaleX(1);
}

.dropdown-icon {
  width: 10px;
  height: 7px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.6;
  transition: transform var(--transition-fast);
}

.navigation-item:hover .dropdown-icon,
.navigation-item.dropdown-open .dropdown-icon {
  transform: rotate(180deg);
}

/* Dropdown */

.navigation-dropdown {
  position: absolute;
  top: calc(100% - 10px);
  left: 50%;
  width: 330px;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 18px;
  background: linear-gradient(
    145deg,
    rgba(15, 30, 58, 0.98),
    rgba(5, 13, 29, 0.98)
  );
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.45);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, 14px);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  transition:
    opacity var(--transition-fast),
    visibility var(--transition-fast),
    transform var(--transition-normal);
}

.navigation-dropdown::before {
  position: absolute;
  top: -18px;
  right: 0;
  left: 0;
  height: 22px;
  content: "";
}

.navigation-dropdown-right {
  right: 0;
  left: auto;
  transform: translate(0, 14px);
}

.navigation-item:hover .navigation-dropdown,
.navigation-item:focus-within .navigation-dropdown,
.navigation-item.dropdown-open .navigation-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.navigation-item:hover .navigation-dropdown-right,
.navigation-item:focus-within .navigation-dropdown-right,
.navigation-item.dropdown-open .navigation-dropdown-right {
  transform: translate(0, 0);
}

.dropdown-header {
  padding: 10px 12px 15px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-bottom: 7px;
}

.dropdown-header strong {
  color: #ffffff;
  font-family: "Manrope", sans-serif;
  font-size: 15px;
  font-weight: 700;
}

.dropdown-eyebrow {
  color: var(--conference-blue-light);
  font-family: "Inter", sans-serif;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.dropdown-link {
  padding: 12px;
  border-radius: 12px;
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 10px;
  color: #ffffff;
  text-decoration: none;
  transition:
    background var(--transition-fast),
    transform var(--transition-fast);
}

.dropdown-link:hover,
.dropdown-link:focus-visible,
.dropdown-link.is-active {
  background: rgba(23, 107, 255, 0.13);
  transform: translateX(3px);
}

.dropdown-link-number {
  padding-top: 2px;
  color: var(--conference-blue-light);
  font-family: "Inter", sans-serif;
  font-size: 10px;
  font-weight: 700;
}

.dropdown-link > span:last-child {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.dropdown-link strong {
  font-family: "Inter", sans-serif;
  font-size: 13px;
  font-weight: 600;
}

.dropdown-link small {
  color: var(--navbar-muted);
  font-family: "Inter", sans-serif;
  font-size: 10px;
  line-height: 1.45;
}

/* Right actions */

.navbar-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

.navbar-register-button {
  min-height: 48px;
  padding: 0 25px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.04);
  font-family: "Inter", sans-serif;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-decoration: none;
  text-transform: uppercase;
  transition:
    border-color var(--transition-fast),
    background var(--transition-fast),
    transform var(--transition-fast);
}

.navbar-register-button:hover {
  border-color: var(--conference-blue-light);
  background: rgba(23, 107, 255, 0.16);
  transform: translateY(-1px);
}

.side-panel-toggle {
  position: relative;
  width: 50px;
  height: 50px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: linear-gradient(
    135deg,
    var(--conference-blue),
    var(--conference-blue-dark)
  );
  box-shadow: 0 12px 30px rgba(23, 107, 255, 0.3);
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.side-panel-toggle:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 38px rgba(23, 107, 255, 0.42);
}

.side-panel-toggle span {
  width: 18px;
  height: 2px;
  border-radius: 10px;
  background: #ffffff;
  transition: width var(--transition-fast);
}

.side-panel-toggle span:nth-child(2) {
  width: 13px;
  margin-left: 5px;
}

.side-panel-toggle:hover span:nth-child(2) {
  width: 18px;
  margin-left: 0;
}

/* Overlay */

.side-panel-overlay {
  position: fixed;
  inset: 0;
  z-index: 1190;
  background: rgba(0, 5, 16, 0.72);
  opacity: 0;
  visibility: hidden;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition:
    opacity var(--transition-normal),
    visibility var(--transition-normal);
}

.side-panel-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

/* Side panel */

.conference-side-panel {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 1200;
  width: min(480px, 100%);
  height: 100dvh;
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  color: #ffffff;
  background:
    radial-gradient(
      circle at 100% 0,
      rgba(23, 107, 255, 0.24),
      transparent 35%
    ),
    linear-gradient(145deg, #0c1931 0%, #050c1b 60%, #030815 100%);
  box-shadow: -30px 0 80px rgba(0, 0, 0, 0.45);
  transform: translateX(102%);
  transition: transform 480ms cubic-bezier(0.22, 1, 0.36, 1);
}

.conference-side-panel.is-open {
  transform: translateX(0);
}

.side-panel-header {
  min-height: 92px;
  padding: 0 34px;
  border-bottom: 1px solid var(--panel-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.side-panel-logo img {
  width: auto;
  height: 50px;
  object-fit: contain;
}

.side-panel-close {
  position: relative;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    background var(--transition-fast),
    transform var(--transition-fast);
}

.side-panel-close:hover {
  border-color: var(--conference-blue-light);
  background: rgba(23, 107, 255, 0.13);
  transform: rotate(5deg);
}

.side-panel-close span {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 17px;
  height: 2px;
  border-radius: 999px;
  background: #ffffff;
}

.side-panel-close span:first-child {
  transform: translate(-50%, -50%) rotate(45deg);
}

.side-panel-close span:last-child {
  transform: translate(-50%, -50%) rotate(-45deg);
}

.side-panel-content {
  flex: 1;
  padding: 44px 34px;
  overflow-y: auto;
}

.side-panel-intro {
  margin-bottom: 34px;
}

.side-panel-eyebrow {
  display: block;
  margin-bottom: 14px;
  color: var(--conference-blue-light);
  font-family: "Inter", sans-serif;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.side-panel-intro h2 {
  margin: 0 0 18px;
  font-family: "Manrope", sans-serif;
  font-size: clamp(31px, 4vw, 46px);
  font-weight: 800;
  line-height: 1.03;
  letter-spacing: -0.045em;
}

.side-panel-intro h2 span {
  display: block;
  color: transparent;
  background: linear-gradient(
    90deg,
    var(--conference-blue-light),
    var(--conference-cyan)
  );
  background-clip: text;
  -webkit-background-clip: text;
}

.side-panel-intro p {
  max-width: 370px;
  margin: 0;
  color: #a8b6cb;
  font-family: "Inter", sans-serif;
  font-size: 14px;
  line-height: 1.7;
}

.side-panel-event-details {
  border-top: 1px solid var(--panel-border);
  border-bottom: 1px solid var(--panel-border);
  margin-bottom: 34px;
}

.event-detail {
  padding: 17px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.event-detail + .event-detail {
  border-top: 1px solid var(--panel-border);
}

.event-detail-label {
  color: #7688a4;
  font-family: "Inter", sans-serif;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.event-detail strong {
  color: #ffffff;
  font-family: "Inter", sans-serif;
  font-size: 12px;
  font-weight: 600;
  text-align: right;
}

/* Mobile navigation inside panel */

.mobile-navigation {
  display: none;
  margin-bottom: 32px;
}

.mobile-navigation-link,
.mobile-dropdown-trigger {
  width: 100%;
  min-height: 58px;
  padding: 0;
  border: 0;
  border-bottom: 1px solid var(--panel-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #ffffff;
  background: transparent;
  font-family: "Manrope", sans-serif;
  font-size: 17px;
  font-weight: 650;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}

.mobile-navigation-link.is-active,
.mobile-dropdown a.is-active {
  color: var(--conference-blue-light);
}

.mobile-dropdown-plus {
  position: relative;
  width: 15px;
  height: 15px;
}

.mobile-dropdown-plus::before,
.mobile-dropdown-plus::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 13px;
  height: 1.5px;
  border-radius: 10px;
  background: var(--conference-blue-light);
  content: "";
  transform: translate(-50%, -50%);
  transition: transform var(--transition-fast);
}

.mobile-dropdown-plus::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.mobile-dropdown-trigger[aria-expanded="true"] .mobile-dropdown-plus::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.mobile-dropdown {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-normal);
}

.mobile-dropdown > div {
  overflow: hidden;
}

.mobile-navigation-group.is-open .mobile-dropdown {
  grid-template-rows: 1fr;
}

.mobile-dropdown {
  overflow: hidden;
}

.mobile-dropdown a {
  display: block;
  padding: 10px 0 10px 18px;
  border-left: 1px solid rgba(77, 147, 255, 0.4);
  color: #9eb0c9;
  font-family: "Inter", sans-serif;
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  transition:
    color var(--transition-fast),
    padding-left var(--transition-fast);
}

.mobile-dropdown a:first-child {
  margin-top: 10px;
}

.mobile-dropdown a:last-child {
  margin-bottom: 10px;
}

.mobile-dropdown a:hover {
  padding-left: 23px;
  color: #ffffff;
}

.side-panel-buttons {
  display: grid;
  gap: 11px;
}

.side-panel-primary-button,
.side-panel-secondary-button {
  min-height: 54px;
  padding: 0 20px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-family: "Inter", sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast);
}

.side-panel-primary-button {
  color: #ffffff;
  background: linear-gradient(
    135deg,
    var(--conference-blue),
    var(--conference-blue-dark)
  );
  box-shadow: 0 15px 36px rgba(23, 107, 255, 0.25);
}

.side-panel-primary-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 42px rgba(23, 107, 255, 0.35);
}

.side-panel-secondary-button {
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: #ffffff;
  background: rgba(255, 255, 255, 0.035);
}

.side-panel-secondary-button:hover {
  border-color: var(--conference-blue-light);
  transform: translateY(-2px);
}

.side-panel-footer {
  padding: 21px 34px;
  border-top: 1px solid var(--panel-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: #71829d;
  font-family: "Inter", sans-serif;
  font-size: 10px;
}

.side-panel-footer a {
  color: #aebbd0;
  text-decoration: none;
}

.side-panel-footer a:hover {
  color: var(--conference-blue-light);
}

/* Responsive */

@media (max-width: 1280px) {
  .navbar-container {
    grid-template-columns: auto 1fr auto;
    gap: 20px;
  }

  .navigation-link {
    padding-right: 11px;
    padding-left: 11px;
    font-size: 10px;
  }

  .navigation-link::after {
    right: 11px;
    left: 11px;
  }

  .navbar-brand-subtitle {
    display: none;
  }

  .navbar-logo {
    height: 58px;
  }
}

@media (max-width: 1050px) {
  .desktop-navigation,
  .navbar-register-button {
    display: none;
  }

  .navbar-container {
    grid-template-columns: 1fr auto;
  }

  .mobile-navigation {
    display: block;
  }

  .side-panel-event-details {
    margin-bottom: 28px;
  }
}

@media (max-width: 640px) {
  :root {
    --navbar-height: 76px;
  }

  .site-header.is-scrolled {
    height: 68px;
  }

  .navbar-container {
    width: min(calc(100% - 30px), var(--navbar-container-width));
  }

  .navbar-logo {
    height: 42px;
  }

  .navbar-brand-name {
    font-size: 14px;
  }

  .side-panel-toggle {
    width: 42px;
    height: 42px;
  }

  .conference-side-panel {
    width: 100%;
  }

  .side-panel-header {
    min-height: 76px;
    padding: 0 20px;
  }

  .side-panel-logo img {
    height: 42px;
  }

  .side-panel-content {
    padding: 30px 20px;
  }

  .side-panel-intro h2 {
    font-size: 34px;
  }

  .side-panel-event-details {
    display: none;
  }

  .side-panel-footer {
    padding: 18px 20px;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

@media (max-width: 410px) {
  .navbar-brand-text {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}