/* =========================================================
   TheSpaceLaunches · Education page styles
   Reference: Education_1791789725067_6u41.png
   ========================================================= */

/* —— Page-level variables —— */
.edu-page {
  --edu-sidebar-w: 260px;
  --edu-gap: 24px;
}

/* —— Hero region (boxed within 1440px, matching the site-wide .container behavior) —— */
.edu-hero {
  position: relative;
  width: 100%;
  max-width: var(--container-max);   /* 1440px, aligned with the site-wide .container spec */
  margin: 0 auto;                    /* centered with symmetric left/right whitespace on wide viewports */
  padding: 24px 40px 0;
  background: transparent;
  overflow: visible;
}
.edu-hero__inner {
  position: relative;
  width: 100%;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  border-radius: var(--radius-lg);
  border: var(--border-glow);
  background:
    linear-gradient(90deg, rgba(4,7,15,0.92) 0%, rgba(4,7,15,0.55) 55%, rgba(4,7,15,0.25) 100%),
    url('https://img.thespacelaunches.cn/thespacelaunches/edu/thumb/hero.webp?v=20261013') center right / cover no-repeat;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  padding: 40px 40px 48px;
}


.edu-hero__title {
  font-family: var(--font-display);
  font-size: 52px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 12px;
  text-shadow: 0 2px 24px rgba(0,0,0,0.55);
}
.edu-hero__sub {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-1);
  max-width: 520px;
  margin-bottom: 28px;
}

/* —— Hero stats strip —— */
.edu-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, max-content));
  gap: 44px;
}
.edu-stat {
  display: flex;
  align-items: center;
  gap: 12px;
}
.edu-stat__icon {
  width: 42px; height: 42px;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(76, 201, 255, 0.10);
  border: 1px solid rgba(76, 201, 255, 0.35);
  border-radius: 10px;
  color: var(--accent-blue);
  font-size: 20px;
  box-shadow: 0 0 14px rgba(76, 201, 255, 0.15);
}
.edu-stat__num {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  line-height: 1.1;
}
.edu-stat__num--empty {
  color: transparent;
  user-select: none;
}
.edu-stat__label {
  font-size: 11px;
  color: var(--text-2);
  letter-spacing: 0.04em;
  margin-top: 2px;
}

/* —— Main two-column layout —— */
.edu-body {
  display: flex;
  gap: var(--edu-gap);
  padding: 28px 40px 64px;
  max-width: var(--container-max);
  margin: 0 auto;
}

/* —— Left sidebar —— */
.edu-sidebar {
  width: var(--edu-sidebar-w);
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--nav-h) + 16px);
  align-self: flex-start;
}
.edu-sidebar__card {
  background: var(--glass-bg-strong);
  border: var(--border-glow);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.edu-sidebar__head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 18px;
  background: rgba(76, 201, 255, 0.12);
  border-bottom: 1px solid rgba(76, 201, 255, 0.18);
  color: var(--accent-blue);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
}
.edu-sidebar__head svg {
  width: 18px; height: 18px;
}
.edu-sidebar__nav {
  padding: 10px;
}
.edu-sidebar__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 12px;
  border-radius: 8px;
  font-size: 13px;
  color: var(--text-1);
  transition: all .15s ease;
  cursor: pointer;
}
.edu-sidebar__item:hover,
.edu-sidebar__item.active {
  background: rgba(76, 201, 255, 0.10);
  color: var(--accent-blue);
}
.edu-sidebar__item.active {
  box-shadow: inset 3px 0 0 var(--accent-blue);
}
.edu-sidebar__item svg {
  width: 16px; height: 16px;
  color: currentColor;
  opacity: 0.85;
}
.edu-sidebar__item--disabled {
  opacity: 0.55;
  cursor: not-allowed;
}
.edu-sidebar__item--disabled:hover,
.edu-sidebar__item--disabled.active {
  background: transparent;
  color: var(--text-1);
}

/* Sidebar bottom tagline card */
.edu-sidebar__cta {
  margin-top: 14px;
  padding: 18px;
  background: linear-gradient(180deg, rgba(15,28,61,0.7), rgba(8,16,42,0.9));
  border-top: 1px solid rgba(76, 201, 255, 0.12);
  text-align: center;
}
.edu-sidebar__rocket {
  width: 56px;
  height: 56px;
  margin: 0 auto 10px;
  filter: drop-shadow(0 0 10px rgba(76,201,255,0.4));
}
.edu-sidebar__cta p {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-1);
  margin-bottom: 14px;
}
.edu-sidebar__cta .btn {
  width: 100%;
  justify-content: center;
}

/* —— Right main content —— */
.edu-main {
  flex: 1;
  min-width: 0;
}
.edu-section {
  margin-bottom: 32px;
}
.edu-section:last-child { margin-bottom: 0; }

.edu-section__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}
.edu-section__title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #fff;
}
.edu-section__title svg {
  width: 20px; height: 20px;
  color: var(--accent-blue);
}
.edu-section__title .muted {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--text-2);
  margin-left: 8px;
}
.edu-section__lede {
  font-size: 12px;
  margin: -8px 0 14px;
  color: var(--text-2);
}

/* —— Featured Project main card —— */
.edu-featured {
  position: relative;
  min-height: 280px;
  border-radius: var(--radius-lg);
  border: var(--border-glow);
  overflow: hidden;
  background: linear-gradient(90deg, rgba(4,7,15,0.95) 0%, rgba(8,16,42,0.92) 50%, rgba(4,7,15,0.85) 100%);
  box-shadow: var(--shadow-card);
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  align-items: center;
  gap: 24px;
  padding: 32px;
}
.edu-featured__content {
  position: relative;
  z-index: 2;
}
.edu-featured__tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: rgba(76, 201, 255, 0.15);
  border: 1px solid rgba(76, 201, 255, 0.45);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 14px;
}
.edu-featured__title {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 12px;
}
.edu-featured__desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-1);
  margin-bottom: 22px;
  max-width: 420px;
}
.edu-featured__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}
.edu-featured__pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: rgba(4,7,15,0.75);
  border: 1px solid rgba(76, 201, 255, 0.35);
  border-radius: 10px;
  font-size: 12px;
  color: var(--text-0);
  backdrop-filter: blur(6px);
}
.edu-featured__pill svg {
  width: 14px; height: 14px;
  color: var(--accent-blue);
}
.edu-featured__tags {
  display: flex;
  gap: 8px;
  margin-top: 18px;
}
.edu-featured__tags .tag {
  background: rgba(76, 201, 255, 0.12);
  border-color: rgba(76, 201, 255, 0.4);
}
.edu-featured__image {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 220px;
  min-width: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}
.edu-featured__image img {
  width: 100%;
  height: 100%;
  min-width: 0;
  object-fit: cover;
  object-position: center;
  transition: transform .4s ease;
}
.edu-featured__image:hover img { transform: scale(1.03); }

/* —— Card grid —— */
.edu-cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
a.edu-card,
.edu-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--glass-bg);
  border: var(--border-glow);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
a.edu-card:hover,
.edu-card:hover {
  transform: translateY(-3px);
  border-color: rgba(76, 201, 255, 0.45);
  box-shadow: 0 8px 28px rgba(0,0,0,0.55), 0 0 22px rgba(76,201,255,0.16), 0 0 0 1px rgba(76,201,255,0.2) inset;
}
.edu-card__media {
  position: relative;
  height: 150px;
  background: linear-gradient(135deg, #0a1226, #16244a);
  overflow: hidden;
}
.edu-card__media img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.95;
  transition: transform .4s ease;
}
.edu-card:hover .edu-card__media img { transform: scale(1.05); }
.edu-card__corner {
  position: absolute;
  top: 10px; left: 10px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.edu-card__corner--popular {
  background: rgba(255, 138, 61, 0.9);
  color: #fff;
}
.edu-card__corner--new {
  background: rgba(92, 227, 155, 0.9);
  color: #08102a;
}
.edu-card__corner--grade {
  background: rgba(76, 201, 255, 0.9);
  color: #08102a;
}
.edu-card__body { padding: 14px 16px 16px; }
.edu-card__title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  line-height: 1.35;
  margin-bottom: 8px;
}
.edu-card__desc {
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-2);
  margin-bottom: 12px;
  min-height: 36px;
}
.edu-card__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text-2);
  margin-bottom: 10px;
}
.edu-card__meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.edu-card__meta svg {
  width: 12px; height: 12px;
  color: var(--accent-blue);
}
.edu-card__rating {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--accent-yellow);
}
.edu-card__rating-count { color: var(--text-3); }
.edu-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}
.edu-card__tags .tag {
  padding: 3px 8px;
  font-size: 10px;
}

/* —— Resources two-column —— */
.edu-resources {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.edu-resource-block {
  background: var(--glass-bg-strong);
  border: var(--border-glow);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 20px;
}
.edu-resource-block .edu-section__head { margin-bottom: 16px; }
.edu-resource-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.edu-resource-card {
  background: rgba(15, 28, 61, 0.55);
  border: 1px solid rgba(76, 201, 255, 0.18);
  border-radius: 10px;
  padding: 16px 12px;
  text-align: center;
  transition: all .15s ease;
}
.edu-resource-card:hover {
  border-color: rgba(76, 201, 255, 0.45);
  background: rgba(15, 28, 61, 0.75);
}
.edu-resource-card__icon {
  width: 38px; height: 38px;
  margin: 0 auto 10px;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(76, 201, 255, 0.10);
  border: 1px solid rgba(76, 201, 255, 0.3);
  border-radius: 10px;
  color: var(--accent-blue);
}
.edu-resource-card__icon svg {
  width: 20px; height: 20px;
}
.edu-resource-card__title {
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 5px;
}
.edu-resource-card__desc {
  font-size: 10px;
  line-height: 1.45;
  color: var(--text-2);
  margin-bottom: 10px;
}
.edu-resource-card__link,
button.edu-resource-card__link {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-blue);
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  transition: color .15s ease;
}
.edu-resource-card__link:hover { color: var(--accent-orange); }

/* —— Bottom CTA —— */
.edu-cta {
  position: relative;
  min-height: 160px;
  border-radius: var(--radius-lg);
  border: var(--border-glow);
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(4,7,15,0.85) 0%, rgba(8,16,42,0.7) 55%, rgba(4,7,15,0.85) 100%),
    url('https://img.thespacelaunches.cn/thespacelaunches/edu/thumb/hero.webp?v=20261013') center / cover no-repeat;
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 32px 40px;
  margin-top: 36px;
}
.edu-cta__astro {
  position: absolute;
  left: 0; bottom: 0;
  height: 130%;
  opacity: 0.35;
  pointer-events: none;
}
.edu-cta__text {
  position: relative;
  z-index: 2;
}
.edu-cta__title {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  background: linear-gradient(90deg, #fff 0%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 6px;
}
.edu-cta__sub {
  font-size: 14px;
  color: var(--text-1);
}
.edu-cta__btn {
  position: relative;
  z-index: 2;
  padding: 14px 28px;
  font-size: 14px;
}

/* —— View All link —— */
.edu-view-all,
button.edu-view-all {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-blue);
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  transition: color .15s ease;
}
.edu-view-all:hover { color: var(--accent-orange); }
.edu-view-all::after { content: "→"; }

/* —— Image-placeholder enhancement —— */
.edu-card__media .media-placeholder::after { right: 10px; bottom: 8px; font-size: 18px; }

/* =========================================================
   Phase 2 (P1) — mobile layout breakpoints
   Per mobile plan §2.4. Desktop rules above (1-594) are
   untouched; rules below only fire at <= 767 / <= 480 so the
   >= 1100 desktop layout is byte-identical to source.
   ========================================================= */

@media (max-width: 767px) {
  /* hero / stat band — drop the 3-column stats to a single
     wrap row, tighten padding, shrink the H1. */
  .edu-hero { padding: 24px 0 18px; }
  .edu-hero__inner { padding: 0 18px; }
  .edu-hero__title { font-size: 28px; }
  .edu-hero__sub { font-size: 14px; }
  .edu-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .edu-stat__num { font-size: 22px; }

  /* body — collapse to single column; the sidebar becomes a
     horizontal nav block above the article body. The PM
     instruction is "static, width 100%, nav items wrap" so
     nothing is hidden, it just changes axis. */
  .edu-body {
    display: block;
    padding: 18px 18px 56px;
    gap: 0;
  }
  .edu-sidebar {
    position: static;
    width: 100%;
    margin-bottom: 18px;
  }
  .edu-sidebar__card { padding: 14px; }
  .edu-sidebar__nav {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
  }
  .edu-sidebar__item {
    padding: 8px 10px;
    font-size: 13px;
  }
  .edu-sidebar__item svg { width: 14px; height: 14px; }
  .edu-sidebar__cta { margin-top: 14px; }
  .edu-sidebar__rocket { width: 44px; height: 44px; }

  /* main article section / grid */
  .edu-section__title { font-size: 16px; }
  .edu-card__title { font-size: 15px; }
  .edu-cta__title { font-size: 20px; }
  .edu-cta__btn { padding: 12px 22px; font-size: 13px; }
}

@media (max-width: 480px) {
  .edu-stats { grid-template-columns: 1fr; }
  .edu-hero__title { font-size: 24px; }
}