/* =========================================================
   Phase 6 — Landing Page
   Append this block to public/css/style.css
   ========================================================= */

.landing-page {
  --landing-navy: #0f172a;
  --landing-slate: #1e293b;
  --landing-blue: #2563eb;
  --landing-sky: #38bdf8;
  --landing-mist: #f1f5f9;
  --landing-border: rgba(148, 163, 184, 0.28);
  min-height: 100vh;
  margin: 0;
  color: var(--landing-navy);
  background:
    radial-gradient(circle at 12% 12%, rgba(96, 165, 250, 0.17), transparent 25rem),
    radial-gradient(circle at 88% 82%, rgba(14, 165, 233, 0.13), transparent 27rem),
    var(--landing-mist);
  overflow-x: hidden;
  position: relative;
}

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

.landing-background {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.landing-grid {
  position: absolute;
  top: 50%;
  left: -11rem;
  width: min(62vw, 43rem);
  opacity: 0.28;
  stroke: #93c5fd;
  stroke-width: 1;
  transform: translateY(-48%) rotate(-10deg);
}

.landing-grid .grid-curve {
  stroke: #3b82f6;
  stroke-width: 2.5;
  stroke-linecap: round;
}

.orbit {
  position: absolute;
  display: block;
  width: 20rem;
  height: 20rem;
  border: 1px solid rgba(59, 130, 246, 0.17);
  border-radius: 50%;
}

.orbit::before,
.orbit::after {
  content: "";
  position: absolute;
  inset: 27%;
  border: inherit;
  border-radius: inherit;
}

.orbit::before {
  transform: rotate(58deg) scaleX(1.9);
}

.orbit::after {
  transform: rotate(-58deg) scaleX(1.9);
}

.orbit-one {
  top: -7rem;
  right: 7vw;
  animation: float-orbit 14s ease-in-out infinite alternate;
}

.orbit-two {
  bottom: -12rem;
  left: 28vw;
  width: 15rem;
  height: 15rem;
  opacity: 0.65;
  animation: float-orbit 18s ease-in-out infinite alternate-reverse;
}

.formula {
  position: absolute;
  color: rgba(30, 41, 59, 0.19);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.2rem, 2.3vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  user-select: none;
}

.formula-one {
  top: 23%;
  right: 7%;
  transform: rotate(-11deg);
}

.formula-two {
  bottom: 17%;
  right: 15%;
  transform: rotate(9deg);
}

.formula-three {
  top: 67%;
  left: 8%;
  transform: rotate(-7deg);
}

.landing-header {
  width: min(100% - 3rem, 76rem);
  min-height: 6.5rem;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--landing-navy);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2.85rem;
  height: 2.85rem;
  place-items: center;
  color: #ffffff;
  background: linear-gradient(135deg, var(--landing-blue), #0f3d9d);
  border-radius: 0.95rem;
  box-shadow: 0 10px 22px rgba(37, 99, 235, 0.22);
}

.brand-mark svg {
  width: 1.75rem;
  height: 1.75rem;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.brand-text {
  display: grid;
  line-height: 1.22;
}

.brand-text strong {
  font-size: 1rem;
  font-weight: 800;
}

.brand-text small {
  margin-top: 0.18rem;
  color: #64748b;
  font-size: 0.73rem;
  font-weight: 600;
}

.header-access-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.teacher-entry-card {
  display: inline-flex;
  align-items: center;
  gap: 0.64rem;
  min-height: 4.25rem;
  padding: 0.42rem 0.55rem 0.42rem 0.88rem;
  color: #f8fafc;
  background:
    radial-gradient(circle at 92% 10%, rgba(56, 189, 248, 0.19), transparent 38%),
    linear-gradient(135deg, #17223a 0%, #0f172a 100%);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 1.15rem;
  box-shadow: 0 13px 28px rgba(15, 23, 42, 0.19);
  text-decoration: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.teacher-entry-photo {
  width: 3.05rem;
  height: 3.05rem;
  flex: 0 0 auto;
  object-fit: cover;
  object-position: center top;
  border: 2px solid rgba(125, 211, 252, 0.58);
  border-radius: 0.88rem;
  box-shadow: 0 5px 14px rgba(2, 6, 23, 0.35);
}

.teacher-entry-copy {
  display: grid;
  gap: 0.09rem;
  min-width: 0;
  line-height: 1.25;
}

.teacher-entry-copy strong {
  color: #f8fafc;
  font-size: 0.84rem;
  font-weight: 800;
  white-space: nowrap;
}

.teacher-entry-copy small {
  color: #94a3b8;
  font-size: 0.64rem;
  font-weight: 700;
  white-space: nowrap;
}

.teacher-entry-arrow {
  color: #7dd3fc;
  font-family: Arial, sans-serif;
  font-size: 1.15rem;
  transition: transform 0.3s ease;
}

.teacher-entry-card:hover {
  border-color: rgba(125, 211, 252, 0.48);
  box-shadow: 0 18px 34px rgba(15, 23, 42, 0.27);
  transform: translateY(-0.2rem);
}

.teacher-entry-card:hover .teacher-entry-arrow {
  transform: translateX(-0.22rem);
}

.header-login-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: #475569;
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
}

.header-login-link span {
  font-family: Arial, sans-serif;
  font-size: 1.1rem;
  transition: transform 0.3s ease;
}

.header-login-link:hover {
  color: var(--landing-blue);
}

.header-login-link:hover span {
  transform: translateX(-0.28rem);
}

.landing-hero {
  display: grid;
  width: min(100% - 3rem, 76rem);
  min-height: calc(100vh - 10.5rem);
  margin: 0 auto;
  place-items: center;
  padding: 2.5rem 0 3.5rem;
}

.hero-content {
  width: min(100%, 61rem);
  text-align: center;
  animation: hero-enter 0.8s ease both;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  padding: 0.48rem 0.85rem;
  color: #1d4ed8;
  background: rgba(219, 234, 254, 0.68);
  border: 1px solid rgba(96, 165, 250, 0.35);
  border-radius: 999px;
  font-size: 0.81rem;
  font-weight: 700;
}

.kicker-dot {
  width: 0.5rem;
  height: 0.5rem;
  background: #3b82f6;
  border-radius: 50%;
  box-shadow: 0 0 0 0.24rem rgba(59, 130, 246, 0.13);
}

.hero-content h1 {
  max-width: 50rem;
  margin: 0 auto;
  color: var(--landing-navy);
  font-size: clamp(2.05rem, 5.25vw, 4.25rem);
  font-weight: 800;
  line-height: 1.34;
  letter-spacing: -0.035em;
}

.hero-content h1::first-line {
  color: #1d4ed8;
}

.hero-description {
  max-width: 42rem;
  margin: 1.25rem auto 1.6rem;
  color: #475569;
  font-size: clamp(0.97rem, 1.7vw, 1.12rem);
  font-weight: 500;
  line-height: 2;
}

.hero-highlights {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem 1.25rem;
  margin-bottom: 2rem;
}

.hero-highlight {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  color: #475569;
  font-size: 0.86rem;
  font-weight: 700;
}

.highlight-icon {
  display: grid;
  width: 1.65rem;
  height: 1.65rem;
  place-items: center;
  color: #2563eb;
  background: #ffffff;
  border: 1px solid rgba(59, 130, 246, 0.15);
  border-radius: 0.53rem;
  box-shadow: 0 3px 10px rgba(15, 23, 42, 0.06);
}

.highlight-icon svg,
.cta-icon svg {
  width: 1.08rem;
  height: 1.08rem;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.landing-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  width: 100%;
  max-width: 58rem;
  margin: 0 auto;
}

.landing-cta {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 5.9rem;
  padding: 1rem 1.05rem;
  overflow: hidden;
  border-radius: 1.15rem;
  text-align: right;
  text-decoration: none;
  transition: all 0.3s ease;
}

.landing-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(120deg, transparent 35%, rgba(255, 255, 255, 0.2), transparent 65%);
  transform: translateX(125%);
  transition: transform 0.6s ease;
}

.landing-cta:hover::before {
  transform: translateX(-125%);
}

.landing-cta:focus-visible,
.teacher-entry-card:focus-visible,
.header-login-link:focus-visible,
.brand:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.44);
  outline-offset: 4px;
}

.cta-icon {
  display: grid;
  flex: 0 0 auto;
  width: 2.55rem;
  height: 2.55rem;
  margin-left: 0.72rem;
  place-items: center;
  border-radius: 0.8rem;
}

.landing-cta > span:nth-child(2) {
  display: grid;
  gap: 0.08rem;
}

.landing-cta strong {
  font-size: 0.98rem;
  font-weight: 800;
}

.landing-cta small {
  font-size: 0.72rem;
  font-weight: 600;
}

.cta-arrow {
  position: absolute;
  inset-inline-start: 1.05rem;
  margin: 0;
  font-family: Arial, sans-serif;
  font-size: 1.3rem;
  transition: transform 0.3s ease;
}

.landing-cta:hover {
  transform: translateY(-0.38rem);
}

.landing-cta:hover .cta-arrow {
  transform: translateX(-0.3rem);
}

.cta-primary {
  color: #ffffff;
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  box-shadow: 0 13px 25px rgba(37, 99, 235, 0.28);
}

.cta-primary .cta-icon {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.16);
}

.cta-primary small {
  color: rgba(255, 255, 255, 0.76);
}

.cta-primary:hover {
  box-shadow: 0 19px 34px rgba(37, 99, 235, 0.38);
}

.cta-parent {
  color: #1e3a8a;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(96, 165, 250, 0.26);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.07);
}

.cta-parent .cta-icon {
  color: #2563eb;
  background: #eff6ff;
}

.cta-parent small {
  color: #64748b;
}

.cta-parent:hover {
  border-color: rgba(37, 99, 235, 0.5);
  box-shadow: 0 18px 32px rgba(15, 23, 42, 0.11);
}

.cta-teacher {
  color: #e2e8f0;
  background: #172033;
  border: 1px solid #25334b;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.17);
}

.cta-teacher .cta-icon {
  color: #7dd3fc;
  background: rgba(56, 189, 248, 0.12);
}

.cta-teacher small {
  color: #94a3b8;
}

.cta-teacher:hover {
  color: #ffffff;
  background: #0f172a;
  border-color: #334155;
  box-shadow: 0 19px 34px rgba(15, 23, 42, 0.28);
}

.landing-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  width: min(100% - 3rem, 76rem);
  min-height: 4rem;
  margin: 0 auto;
  color: #64748b;
  font-size: 0.75rem;
  font-weight: 600;
  text-align: center;
}

.landing-footer p {
  margin: 0;
}

.footer-rule {
  width: 1.5rem;
  height: 1px;
  background: #cbd5e1;
}

@keyframes hero-enter {
  from {
    opacity: 0;
    transform: translateY(1rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float-orbit {
  from {
    transform: translate3d(0, 0, 0) rotate(0deg);
  }
  to {
    transform: translate3d(0, 1.4rem, 0) rotate(9deg);
  }
}

@media (max-width: 52rem) {
  .landing-actions {
    grid-template-columns: 1fr;
    max-width: 30rem;
  }

  .landing-cta {
    min-height: 5.2rem;
  }

  .formula-three,
  .orbit-two {
    display: none;
  }
}

@media (max-width: 34rem) {
  .landing-header,
  .landing-hero,
  .landing-footer {
    width: min(100% - 2rem, 76rem);
  }

  .landing-header {
    min-height: 5.5rem;
  }

  .brand-mark {
    width: 2.55rem;
    height: 2.55rem;
  }

  .brand-text strong {
    font-size: 0.88rem;
  }

  .brand-text small {
    font-size: 0.65rem;
  }

  .header-access-links {
    gap: 0.5rem;
  }

  .teacher-entry-card {
    min-height: 3.35rem;
    gap: 0.4rem;
    padding: 0.28rem 0.35rem 0.28rem 0.55rem;
    border-radius: 0.85rem;
  }

  .teacher-entry-photo {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.66rem;
  }

  .teacher-entry-copy small,
  .teacher-entry-arrow {
    display: none;
  }

  .teacher-entry-copy strong {
    font-size: 0.7rem;
  }

  .header-login-link {
    font-size: 0.76rem;
  }

  .landing-hero {
    min-height: calc(100vh - 9.5rem);
    padding: 1.25rem 0 2rem;
  }

  .hero-content h1 {
    font-size: clamp(1.8rem, 9vw, 2.35rem);
    line-height: 1.43;
  }

  .hero-description {
    margin-top: 1rem;
    font-size: 0.91rem;
    line-height: 1.9;
  }

  .hero-highlights {
    gap: 0.55rem 0.8rem;
    margin-bottom: 1.45rem;
  }

  .hero-highlight {
    font-size: 0.76rem;
  }

  .formula-two {
    right: 2%;
    bottom: 11%;
  }

  .landing-footer {
    flex-wrap: wrap;
    gap: 0.35rem 0.55rem;
    padding: 0.7rem 0;
    font-size: 0.66rem;
  }
}

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