/* =========================================
   MSA CONFERENCE 2027
   Shared Design System
========================================= */

:root {
  --msa-primary: #a50021;
  --msa-primary-dark: #800019;
  --msa-primary-light: #fff1f4;

  --msa-text: #252525;
  --msa-muted: #6b7280;
  --msa-border: #e9e9ec;

  --msa-white: #ffffff;
  --msa-footer: #1d1d20;

  --msa-font: "Inter", sans-serif;

  --bs-primary: #a50021;
  --bs-body-font-family: var(--msa-font);
  --bs-body-color: var(--msa-text);
  --bs-link-color: var(--msa-primary);
}

/* =========================================
   GENERAL
========================================= */

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--msa-font);
  background: var(--msa-white);
  color: var(--msa-text);
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
}

button,
input,
select,
textarea {
  font-family: inherit;
}

.container {
  max-width: 1280px;
}

/* =========================================
   HEADER
========================================= */

.site-header {
  position: relative;
  z-index: 1030;
  background: var(--msa-white);
  border-bottom: 1px solid var(--msa-border);
}

.msa-navbar {
  padding: 12px 0;
  min-height: 96px;
}

.msa-brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-right: 30px;
  white-space: normal;
}

.msa-brand-logo {
  width: 68px;
  height: 68px;
  object-fit: contain;
  flex-shrink: 0;
}

.msa-brand-text {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.msa-brand-text strong {
  color: var(--msa-text);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.3;
}

.msa-brand-text small {
  color: var(--msa-primary);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15px;
}

/* =========================================
   NAVIGATION
========================================= */

.msa-navbar .navbar-nav {
  gap: 5px;
}

.msa-navbar .nav-link {
  padding: 12px 11px;
  font-size: 13px;
  font-weight: 600;
  color: #414147;
  transition: color 0.2s ease;
}

.msa-navbar .nav-link:hover,
.msa-navbar .nav-link:focus,
.msa-navbar .nav-link.active,
.msa-navbar .nav-link.show {
  color: var(--msa-primary);
}

.msa-navbar .dropdown-toggle {
  background: transparent;
  border: none;
  cursor: pointer;
}

.msa-navbar .dropdown-toggle::after {
  margin-left: 7px;
  vertical-align: 3px;
  border-top-width: 4px;
}

.msa-navbar .dropdown-menu {
  min-width: 230px;
  padding: 8px;
  border: 1px solid var(--msa-border);
  border-radius: 8px;
  background: var(--msa-white);
  box-shadow: 0 10px 30px rgba(24, 24, 30, 0.1);
}

.msa-navbar .dropdown-item {
  padding: 11px 13px;
  border-radius: 5px;
  font-size: 12px;
  font-weight: 500;
  color: var(--msa-text);
  transition:
    background-color 0.2s ease,
    color 0.2s ease;
}

.msa-navbar .dropdown-item:hover,
.msa-navbar .dropdown-item:focus {
  background: var(--msa-primary-light);
  color: var(--msa-primary);
}

.msa-navbar .dropdown-item:active {
  background: var(--msa-primary);
  color: white;
}

.msa-register-item {
  margin-left: 14px;
}

/* =========================================
   MATERIO-INSPIRED BUTTON
========================================= */

.btn-materio {
  --bs-btn-color: #ffffff;
  --bs-btn-bg: #a50021;
  --bs-btn-border-color: #a50021;

  --bs-btn-hover-color: #ffffff;
  --bs-btn-hover-bg: #87001b;
  --bs-btn-hover-border-color: #87001b;

  --bs-btn-active-color: #ffffff;
  --bs-btn-active-bg: #760018;
  --bs-btn-active-border-color: #760018;

  --bs-btn-focus-shadow-rgb: 165, 0, 33;

  display: inline-flex;
  align-items: center;
  justify-content: center;

  padding: 11px 22px;
  border-radius: 6px;

  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.3px;
  white-space: nowrap;

  box-shadow: 0 3px 8px rgba(165, 0, 33, 0.2);

  transition:
    background-color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.2s ease;
}

.btn-materio:hover {
  box-shadow: 0 5px 12px rgba(165, 0, 33, 0.28);
  transform: translateY(-1px);
}

.btn-materio:focus-visible {
  outline: 2px solid var(--msa-primary);
  outline-offset: 3px;
}

/* =========================================
   MOBILE NAVIGATION
========================================= */

.msa-toggler {
  padding: 8px 10px;
  border: 1px solid var(--msa-border);
  border-radius: 6px;
  box-shadow: none;
}

.msa-toggler:focus {
  box-shadow: 0 0 0 3px rgba(165, 0, 33, 0.12);
}

.msa-toggler .navbar-toggler-icon {
  width: 23px;
  height: 23px;
}

@media (max-width: 1199.98px) {
  .msa-navbar {
    min-height: 80px;
  }

  .msa-navbar .navbar-collapse {
    padding-top: 16px;
  }

  .msa-navbar .navbar-nav {
    align-items: stretch !important;
    gap: 0;
    padding: 10px 0 15px;
    border-top: 1px solid var(--msa-border);
  }

  .msa-navbar .nav-link {
    width: 100%;
    padding: 13px 4px;
    text-align: left;
  }

  .msa-navbar .dropdown-menu {
    margin: 0 0 10px;
    padding: 5px 0 5px 12px;
    border: none;
    border-left: 2px solid var(--msa-primary);
    border-radius: 0;
    box-shadow: none;
  }

  .msa-register-item {
    margin: 14px 0 0;
  }

  .msa-register-item .btn {
    width: 100%;
  }
}

@media (max-width: 575.98px) {
  .msa-navbar {
    padding: 10px 0;
  }

  .msa-brand {
    gap: 10px;
    margin-right: 8px;
  }

  .msa-brand-logo {
    width: 49px;
    height: 49px;
  }

  .msa-brand-text strong {
    font-size: 11px;
  }

  .msa-brand-text small {
    font-size: 9px;
  }
}

@media (max-width: 370px) {
  .msa-brand-text {
    max-width: 170px;
  }

  .msa-brand-text strong {
    font-size: 10px;
  }
}

/* =========================================
   FOOTER
========================================= */

.site-footer {
  padding: 65px 0 0;
  background: var(--msa-footer);
  color: var(--msa-white);
}

.footer-main {
  padding-bottom: 55px;
}

.footer-brand {
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.footer-logo {
  width: 85px;
  height: 85px;
  object-fit: contain;
  flex-shrink: 0;
}

.footer-brand-content h2 {
  margin: 4px 0 12px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
}

.footer-brand-content p {
  margin: 0 0 8px;
  color: #b5b5bc;
  font-size: 13px;
  line-height: 1.7;
}

.footer-brand-content .footer-conference {
  color: #ffffff;
  font-weight: 600;
}

.footer-heading {
  margin-bottom: 20px;
  font-size: 13px;
  font-weight: 700;
  color: #ffffff;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 13px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.footer-links a {
  color: #b5b5bc;
  font-size: 13px;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-bottom {
  padding: 22px 0;
  border-top: 1px solid #39393f;
}

.footer-bottom p {
  margin: 0;
  color: #96969f;
  font-size: 12px;
}

@media (max-width: 767.98px) {
  .site-footer {
    padding-top: 45px;
  }

  .footer-main {
    padding-bottom: 40px;
  }

  .footer-logo {
    width: 65px;
    height: 65px;
  }

  .footer-brand {
    gap: 15px;
  }
}

/* =========================================
   ACCESSIBILITY
========================================= */

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

/* =========================================
   404 ERROR PAGE
========================================= */

.error-page {
  display: flex;
  align-items: center;
  min-height: 65vh;
  padding: 100px 0;
  background: #ffffff;
}

.error-content {
  max-width: 650px;
  margin: 0 auto;
  text-align: center;
}

.error-label {
  display: block;
  margin-bottom: 18px;
  color: var(--msa-primary);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 3px;
}

.error-content h1 {
  margin-bottom: 20px;
  color: var(--msa-text);
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 800;
  letter-spacing: -2px;
}

.error-content > p {
  max-width: 470px;
  margin: 0 auto 32px;
  color: var(--msa-muted);
  font-size: 16px;
  line-height: 1.8;
}

.error-content .btn-materio {
  padding: 14px 28px;
}

.error-divider {
  width: 60px;
  height: 2px;
  margin: 55px auto 28px;
  background: var(--msa-primary);
}

.error-content .error-conference {
  margin-bottom: 0;
  color: var(--msa-text);
  font-size: 13px;
  font-weight: 600;
}

.error-conference span {
  display: block;
  margin-top: 8px;
  color: var(--msa-muted);
  font-size: 12px;
  font-weight: 400;
}

@media (max-width: 767.98px) {
  .error-page {
    min-height: 55vh;
    padding: 75px 0;
  }

  .error-content h1 {
    letter-spacing: -1px;
  }

  .error-content > p {
    font-size: 14px;
  }
}