@font-face {
  font-family: "Inter";
  src:
    url("font/Inter-VariableFont_opsz,wght.woff2") format("woff2"),
    url("font/Inter-VariableFont_opsz,wght.woff") format("woff");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  src:
    url("font/Inter-Italic-VariableFont_opsz,wght.woff2") format("woff2"),
    url("font/Inter-Italic-VariableFont_opsz,wght.woff") format("woff");
  font-style: italic;
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --brand: #0b345f;
  --brand-deep: #08253f;
  --accent: #d97706;
  --accent-strong: #b45309;
  --ink: #11233d;
  --ink-soft: #315275;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: rgba(255, 255, 255, 0.96);
  --line: rgba(17, 35, 61, 0.16);
  --shadow: 0 24px 48px rgba(8, 37, 63, 0.25);
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Inter", "Avenir Next", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    linear-gradient(155deg, rgba(11, 52, 95, 0.58), rgba(8, 37, 63, 0.4)),
    url("../images/background-pattern.png") center top / cover no-repeat fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 20% 25%, rgba(249, 115, 22, 0.24), transparent 55%),
    radial-gradient(circle at 75% 15%, rgba(56, 189, 248, 0.18), transparent 45%);
}

body.modal-open {
  overflow: hidden;
}

.site-shell {
  position: relative;
  z-index: 1;
  width: min(1220px, 100% - 2.5rem);
  margin: 1.5rem auto;
  display: grid;
  gap: 1.2rem;
}

.site-header {
  background: var(--brand);
  color: #f8fbff;
  border: 1px solid rgba(248, 251, 255, 0.18);
  border-radius: 1rem;
  padding: 1rem 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  box-shadow: var(--shadow);
  animation: rise-in 0.55s ease both;
}

.brand {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.menu {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.35rem 0.9rem;
}

.menu a {
  color: #dbeafe;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 0.25rem 0.1rem;
  transition: color 0.24s ease, transform 0.24s ease;
}

.menu a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.22rem;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, #f59e0b, #fb7185);
  transition: transform 0.24s ease;
}

.menu a:hover,
.menu a:focus-visible {
  color: #ffffff;
  transform: translateY(-2px);
}

.menu a:hover::after,
.menu a:focus-visible::after {
  transform: scaleX(1);
}

.main-content {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(280px, 0.85fr);
  gap: 1.2rem;
}

.content-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 1rem;
  box-shadow: var(--shadow);
  overflow: hidden;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.iframe-panel {
  animation: rise-in 0.65s 0.07s ease both;
}

.media-panel {
  animation: rise-in 0.65s 0.14s ease both;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.95rem 1rem;
  border-bottom: 1px solid var(--line);
  background: var(--surface-strong);
}

.panel-head h2 {
  margin: 0;
  font-size: clamp(1rem, 1.4vw, 1.2rem);
  color: var(--ink);
}

.panel-head a,
.panel-head span {
  color: var(--ink-soft);
  font-size: 0.86rem;
}

.panel-head a {
  text-decoration: none;
  border-bottom: 1px dashed currentColor;
}

.panel-head a:hover {
  color: var(--brand);
}

.iframe-wrap {
  aspect-ratio: 4 / 3;
  min-height: 24rem;
}

.iframe-wrap iframe,
.video-wrap video,
#qa-iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.video-wrap {
  aspect-ratio: 16 / 9;
  background: #000;
}

.ask-button {
  margin: 1rem;
  margin-top: 0.9rem;
  width: calc(100% - 2rem);
  border: 0;
  border-radius: 0.85rem;
  padding: 0.85rem 1rem;
  font-size: 0.97rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: #fffdf7;
  background: linear-gradient(130deg, var(--accent), var(--accent-strong));
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.ask-button:hover,
.ask-button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 12px 22px rgba(180, 83, 9, 0.38);
  filter: saturate(1.1);
}

.site-footer {
  background: rgba(8, 37, 63, 0.88);
  color: #e2edff;
  border-radius: 0.95rem;
  border: 1px solid rgba(226, 237, 255, 0.18);
  text-align: center;
  padding: 0.85rem 1.1rem;
  font-size: 0.9rem;
  animation: rise-in 0.72s 0.2s ease both;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 1.25rem;
  opacity: 0;
  visibility: hidden;
  background: rgba(8, 37, 63, 0.66);
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.modal.open {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  width: min(960px, 100%);
  height: min(84vh, 690px);
  display: grid;
  grid-template-rows: auto 1fr;
  border-radius: 1rem;
  overflow: hidden;
  background: #ffffff;
  border: 1px solid var(--line);
  box-shadow: 0 32px 56px rgba(4, 22, 41, 0.4);
  transform: translateY(10px) scale(0.98);
  transition: transform 0.25s ease;
}

.modal.open .modal-dialog {
  transform: translateY(0) scale(1);
}

.modal-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line);
  background: #f8fbff;
}

.close-button {
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--ink);
  border-radius: 0.6rem;
  padding: 0.45rem 0.8rem;
  font-size: 0.86rem;
  cursor: pointer;
}

.close-button:hover,
.close-button:focus-visible {
  border-color: var(--brand);
  color: var(--brand);
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1024px) {
  .site-shell {
    width: min(1220px, 100% - 1.4rem);
    margin-top: 1rem;
    margin-bottom: 1rem;
  }

  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .menu {
    justify-content: flex-start;
  }

  .main-content {
    grid-template-columns: 1fr;
  }

  .iframe-wrap {
    min-height: 21rem;
  }
}

@media (max-width: 680px) {
  .site-header {
    padding: 0.9rem 0.85rem;
  }

  .menu {
    gap: 0.28rem 0.7rem;
  }

  .menu a {
    font-size: 0.86rem;
  }

  .panel-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .iframe-wrap {
    min-height: 18rem;
  }

  .ask-button {
    margin: 0.85rem;
    width: calc(100% - 1.7rem);
  }

  .modal {
    padding: 0.55rem;
  }

  .modal-dialog {
    height: min(90vh, 760px);
    border-radius: 0.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}