/* ============================================================
   LoneStar AI · Classroom Lab — Educators Page
   ============================================================ */

/* ----------------- ANIMATIONS ----------------- */

@keyframes edu-fade-up {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes edu-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes edu-gradient-sweep {
  0%, 100% { background-position: 0% 50%; }
  50%      { background-position: 100% 50%; }
}

@keyframes edu-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

@keyframes edu-pulse-glow {
  0%, 100% { box-shadow: 0 16px 40px -16px rgba(78, 160, 255, 0.6); }
  50%      { box-shadow: 0 22px 55px -16px rgba(78, 160, 255, 0.9); }
}

@keyframes edu-shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes edu-blink {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.45; }
}

/* Scroll-revealed elements start hidden, animate in when .is-visible is added */
.edu-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 700ms ease, transform 700ms cubic-bezier(0.2, 0.7, 0.2, 1);
  will-change: opacity, transform;
}

.edu-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for grid children */
.edu-reveal.is-visible > *:nth-child(1) { animation: edu-fade-up 600ms 0ms both; }
.edu-reveal.is-visible > *:nth-child(2) { animation: edu-fade-up 600ms 80ms both; }
.edu-reveal.is-visible > *:nth-child(3) { animation: edu-fade-up 600ms 160ms both; }
.edu-reveal.is-visible > *:nth-child(4) { animation: edu-fade-up 600ms 240ms both; }
.edu-reveal.is-visible > *:nth-child(5) { animation: edu-fade-up 600ms 320ms both; }
.edu-reveal.is-visible > *:nth-child(6) { animation: edu-fade-up 600ms 400ms both; }
.edu-reveal.is-visible > *:nth-child(7) { animation: edu-fade-up 600ms 480ms both; }
.edu-reveal.is-visible > *:nth-child(8) { animation: edu-fade-up 600ms 560ms both; }

@media (prefers-reduced-motion: reduce) {
  .edu-reveal,
  .edu-reveal.is-visible > * {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
  }
}

:root {
  --edu-bg: #060a14;
  --edu-bg-soft: #0b1322;
  --edu-bg-card: #0f1828;
  --edu-bg-alt: #08101e;
  --edu-fg: #f4f7fb;
  --edu-fg-dim: #99abc1;
  --edu-fg-faint: #6f7f95;
  --edu-accent: #4ea0ff;
  --edu-accent-soft: rgba(78, 160, 255, 0.16);
  --edu-gold: #f5c669;
  --edu-green: #6fe5b6;
  --edu-border: rgba(190, 202, 219, 0.12);
  --edu-border-strong: rgba(190, 202, 219, 0.22);
  --edu-radius: 20px;
  --edu-radius-sm: 12px;
  --edu-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.6);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--edu-bg);
  color: var(--edu-fg);
  font-family: "Inter Tight", "Manrope", system-ui, -apple-system, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

body {
  background:
    radial-gradient(circle at 15% 10%, rgba(78, 160, 255, 0.10), transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(245, 198, 105, 0.06), transparent 50%),
    var(--edu-bg);
  min-height: 100vh;
}

a {
  color: var(--edu-accent);
  text-decoration: none;
  transition: color 160ms ease;
}

a:hover {
  color: var(--edu-fg);
}

/* ----------------- NAV ----------------- */

.edu-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 2rem;
  background: rgba(6, 10, 20, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--edu-border);
}

.edu-nav__logo {
  font-family: "Fraunces", serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--edu-fg);
  letter-spacing: -0.01em;
}

.edu-nav__star {
  color: var(--edu-gold);
  margin-right: 0.2rem;
  display: inline-block;
  animation: edu-float 3.4s ease-in-out infinite;
}

.edu-nav__links {
  display: flex;
  gap: 1.6rem;
  align-items: center;
}

.edu-nav__links a {
  color: var(--edu-fg-dim);
  font-size: 0.92rem;
  font-weight: 500;
}

.edu-nav__links a:hover {
  color: var(--edu-fg);
}

.edu-nav__cta {
  padding: 0.55rem 1.05rem;
  border-radius: 999px;
  background: var(--edu-accent-soft);
  border: 1px solid rgba(78, 160, 255, 0.32);
  color: var(--edu-fg) !important;
}

/* ----------------- MAIN ----------------- */

.edu-main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 3rem 2rem 5rem;
}

/* ----------------- HERO ----------------- */

.edu-hero {
  padding: 4rem 0 5rem;
  text-align: left;
}

.edu-hero__kicker {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--edu-border-strong);
  background: rgba(255, 255, 255, 0.03);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--edu-fg-dim);
  margin-bottom: 1.6rem;
  animation: edu-fade-up 700ms 100ms both;
}

.edu-hero__kicker::before {
  content: "●";
  color: var(--edu-green);
  margin-right: 0.4rem;
  display: inline-block;
  animation: edu-blink 2.2s ease-in-out infinite;
}

.edu-hero__title {
  font-family: "Fraunces", serif;
  font-weight: 600;
  font-size: clamp(2.4rem, 5vw, 4.1rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  margin: 0 0 1.4rem;
  color: var(--edu-fg);
  animation: edu-fade-up 800ms 220ms both;
}

.edu-hero__title-accent {
  font-style: italic;
  background: linear-gradient(
    100deg,
    var(--edu-accent) 0%,
    var(--edu-gold) 40%,
    var(--edu-green) 60%,
    var(--edu-accent) 100%
  );
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: edu-gradient-sweep 7s ease-in-out infinite;
}

.edu-hero__copy {
  max-width: 680px;
  font-size: 1.15rem;
  color: var(--edu-fg-dim);
  margin: 0 0 2rem;
  line-height: 1.65;
  animation: edu-fade-up 800ms 380ms both;
}

.edu-hero__cta-row {
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
  animation: edu-fade-up 800ms 520ms both;
}

.edu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.6rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  border: 1px solid var(--edu-border-strong);
  background: transparent;
  color: var(--edu-fg);
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.edu-btn:hover {
  transform: translateY(-1px);
}

.edu-btn--primary {
  background: linear-gradient(135deg, var(--edu-accent), #2c7ad6);
  border-color: rgba(78, 160, 255, 0.5);
  color: white;
  box-shadow: 0 16px 40px -16px rgba(78, 160, 255, 0.6);
  animation: edu-pulse-glow 3.5s ease-in-out infinite;
}

.edu-btn--primary:hover {
  color: white;
  box-shadow: 0 20px 50px -16px rgba(78, 160, 255, 0.7);
}

.edu-btn--ghost {
  background: rgba(255, 255, 255, 0.03);
}

.edu-btn--ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--edu-fg-dim);
}

.edu-hero__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--edu-border);
  animation: edu-fade-up 800ms 700ms both;
}

.edu-hero__stats .edu-stat {
  transition: transform 220ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.edu-hero__stats .edu-stat:hover {
  transform: translateY(-4px);
}

.edu-hero__stats .edu-stat:hover strong {
  color: var(--edu-accent);
}

.edu-stat strong {
  transition: color 220ms ease;
}

.edu-stat strong {
  display: block;
  font-family: "Fraunces", serif;
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--edu-fg);
  margin-bottom: 0.3rem;
  letter-spacing: -0.02em;
}

.edu-stat span {
  color: var(--edu-fg-faint);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ----------------- SECTIONS ----------------- */

.edu-section {
  padding: 4.5rem 0;
  border-top: 1px solid var(--edu-border);
}

.edu-section--alt {
  background:
    linear-gradient(180deg, rgba(78, 160, 255, 0.025), transparent),
    var(--edu-bg-alt);
  border-radius: var(--edu-radius);
  padding: 4.5rem 2.5rem;
  margin: 2rem -2.5rem;
  border-top: 1px solid var(--edu-border);
}

.edu-section__head {
  max-width: 760px;
  margin-bottom: 3rem;
}

.edu-section__kicker {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--edu-gold);
  margin-bottom: 1rem;
}

.edu-section__title {
  font-family: "Fraunces", serif;
  font-weight: 600;
  font-size: clamp(1.9rem, 3.5vw, 2.7rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--edu-fg);
  margin: 0 0 1rem;
}

.edu-section__sub {
  font-size: 1.05rem;
  color: var(--edu-fg-dim);
  line-height: 1.65;
  margin: 0;
}

/* ----------------- CARD GRID (Why) ----------------- */

.edu-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.edu-card {
  padding: 1.6rem;
  border-radius: var(--edu-radius);
  border: 1px solid var(--edu-border);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.005));
  transition: transform 200ms ease, border-color 200ms ease, background 200ms ease;
}

.edu-card:hover {
  transform: translateY(-3px);
  border-color: var(--edu-border-strong);
  background: linear-gradient(135deg, rgba(78, 160, 255, 0.06), rgba(255, 255, 255, 0.02));
}

.edu-card__icon {
  font-size: 1.6rem;
  margin-bottom: 0.8rem;
  display: inline-block;
  transition: transform 320ms cubic-bezier(0.2, 0.9, 0.2, 1.3);
}

.edu-card:hover .edu-card__icon {
  transform: scale(1.18) rotate(-6deg);
}

.edu-card h3 {
  font-family: "Fraunces", serif;
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  margin: 0 0 0.5rem;
  color: var(--edu-fg);
}

.edu-card p {
  color: var(--edu-fg-dim);
  font-size: 0.94rem;
  line-height: 1.6;
  margin: 0;
}

/* ----------------- OUTCOMES ----------------- */

.edu-outcomes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.2rem 2rem;
}

.edu-outcome {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 1rem;
  padding: 1.2rem 0;
  border-top: 1px solid var(--edu-border);
}

.edu-outcome__num {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85rem;
  color: var(--edu-accent);
  letter-spacing: 0.08em;
  padding-top: 0.2rem;
}

.edu-outcome h3 {
  font-family: "Fraunces", serif;
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  margin: 0 0 0.4rem;
  color: var(--edu-fg);
}

.edu-outcome p {
  color: var(--edu-fg-dim);
  font-size: 0.92rem;
  line-height: 1.6;
  margin: 0;
}

/* ----------------- ACTIVITIES ----------------- */

.edu-activities {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1rem;
}

.edu-activity {
  padding: 1.6rem;
  border-radius: var(--edu-radius);
  border: 1px solid var(--edu-border);
  background: var(--edu-bg-card);
  transition: transform 200ms ease, border-color 200ms ease;
}

.edu-activity:hover {
  transform: translateY(-2px);
  border-color: rgba(245, 198, 105, 0.3);
}

.edu-activity__tag {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--edu-gold);
  margin-bottom: 0.85rem;
}

.edu-activity h3 {
  font-family: "Fraunces", serif;
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  margin: 0 0 0.6rem;
  color: var(--edu-fg);
}

.edu-activity p {
  color: var(--edu-fg-dim);
  font-size: 0.94rem;
  line-height: 1.6;
  margin: 0 0 1.1rem;
}

.edu-activity__meta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  font-size: 0.78rem;
  color: var(--edu-fg-faint);
  font-family: "JetBrains Mono", monospace;
  letter-spacing: 0.04em;
}

/* ----------------- STEPS ----------------- */

.edu-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.edu-step {
  position: relative;
  padding: 1.6rem 1.4rem;
  border-radius: var(--edu-radius);
  border: 1px solid var(--edu-border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0));
}

.edu-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: var(--edu-accent-soft);
  border: 1px solid rgba(78, 160, 255, 0.32);
  color: var(--edu-accent);
  font-family: "JetBrains Mono", monospace;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 1rem;
  transition: transform 250ms cubic-bezier(0.2, 0.9, 0.2, 1.4), background 250ms ease;
}

.edu-step:hover .edu-step__num {
  transform: scale(1.15);
  background: rgba(78, 160, 255, 0.28);
}

.edu-step h3 {
  font-family: "Fraunces", serif;
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  margin: 0 0 0.5rem;
  color: var(--edu-fg);
}

.edu-step p {
  color: var(--edu-fg-dim);
  font-size: 0.92rem;
  line-height: 1.6;
  margin: 0;
}

/* ----------------- FAQ ----------------- */

.edu-faq {
  display: grid;
  gap: 0.7rem;
  max-width: 920px;
}

.edu-faq__item {
  padding: 1.1rem 1.3rem;
  border-radius: var(--edu-radius-sm);
  border: 1px solid var(--edu-border);
  background: rgba(255, 255, 255, 0.02);
  transition: border-color 160ms ease, background 160ms ease;
}

.edu-faq__item[open] {
  border-color: var(--edu-border-strong);
  background: rgba(255, 255, 255, 0.035);
}

.edu-faq__item summary {
  cursor: pointer;
  font-family: "Inter Tight", sans-serif;
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--edu-fg);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.edu-faq__item summary::-webkit-details-marker {
  display: none;
}

.edu-faq__item summary::after {
  content: "+";
  color: var(--edu-accent);
  font-family: "JetBrains Mono", monospace;
  font-size: 1.4rem;
  transition: transform 200ms ease;
}

.edu-faq__item[open] summary::after {
  content: "−";
  transform: rotate(0deg);
}

.edu-faq__item p {
  color: var(--edu-fg-dim);
  font-size: 0.95rem;
  line-height: 1.65;
  margin: 0.9rem 0 0;
}

/* ----------------- CONTACT ----------------- */

.edu-contact {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.edu-contact__kicker {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--edu-gold);
  margin-bottom: 1rem;
}

.edu-contact__title {
  font-family: "Fraunces", serif;
  font-weight: 600;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 1.2rem;
  color: var(--edu-fg);
}

.edu-contact__copy {
  font-size: 1.08rem;
  color: var(--edu-fg-dim);
  line-height: 1.7;
  margin: 0 0 2rem;
}

.edu-contact__email {
  display: inline-block;
  padding: 1rem 2rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--edu-accent), #2c7ad6);
  color: white !important;
  font-family: "JetBrains Mono", monospace;
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  border: 1px solid rgba(78, 160, 255, 0.5);
  box-shadow: 0 16px 40px -16px rgba(78, 160, 255, 0.6);
  transition: transform 160ms ease, box-shadow 200ms ease;
}

.edu-contact__email:hover {
  transform: translateY(-2px);
  box-shadow: 0 22px 55px -16px rgba(78, 160, 255, 0.75);
}

.edu-contact__email {
  position: relative;
  overflow: hidden;
}

.edu-contact__email::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.25),
    transparent
  );
  background-size: 200% 100%;
  animation: edu-shimmer 3.5s ease-in-out infinite;
  pointer-events: none;
}

.edu-contact__note {
  margin-top: 1.4rem;
  font-size: 0.88rem;
  color: var(--edu-fg-faint);
}

/* ----------------- FOOTER ----------------- */

.edu-footer {
  border-top: 1px solid var(--edu-border);
  padding: 2.5rem 2rem 2rem;
  background: var(--edu-bg-alt);
}

.edu-footer__inner {
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-bottom: 1.5rem;
}

.edu-footer__logo {
  font-family: "Fraunces", serif;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--edu-fg);
  margin-bottom: 0.4rem;
}

.edu-footer__tag {
  color: var(--edu-fg-faint);
  font-size: 0.88rem;
}

.edu-footer__links {
  display: flex;
  gap: 1.4rem;
}

.edu-footer__links a {
  color: var(--edu-fg-dim);
  font-size: 0.9rem;
}

.edu-footer__copy {
  max-width: 1180px;
  margin: 1.5rem auto 0;
  padding-top: 1.2rem;
  border-top: 1px solid var(--edu-border);
  font-size: 0.82rem;
  color: var(--edu-fg-faint);
  text-align: center;
}

/* ----------------- RESPONSIVE ----------------- */

@media (max-width: 720px) {
  .edu-nav {
    padding: 1rem 1.2rem;
  }
  .edu-nav__links {
    gap: 1rem;
  }
  .edu-nav__links a:not(.edu-nav__cta) {
    display: none;
  }
  .edu-main {
    padding: 2rem 1.2rem 4rem;
  }
  .edu-hero {
    padding: 2rem 0 3rem;
  }
  .edu-hero__stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem 1rem;
  }
  .edu-section--alt {
    padding: 3rem 1.4rem;
    margin: 1.5rem -1.2rem;
    border-radius: var(--edu-radius-sm);
  }
  .edu-section {
    padding: 3rem 0;
  }
}