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

html {
  scroll-behavior: smooth;
}

body.landing {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: #1e1b4b;
  background: #f4f2ef;
  line-height: 1.5;
}

.landing a {
  color: #4f46e5;
}

.landing-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: calc(0.85rem + env(safe-area-inset-top, 0px)) 1.25rem 0.85rem;
  background: #312e81;
  color: #eef2ff;
}

.landing-logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1.1rem;
  color: inherit;
  text-decoration: none;
}

.landing-logo img {
  width: 2rem;
  height: 2rem;
  border-radius: 6px;
}

.landing-nav {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.landing-nav a {
  color: #eef2ff;
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.45rem 0.65rem;
  border-radius: 8px;
}

.landing-nav a:hover {
  background: rgb(255 255 255 / 0.12);
}

.landing-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: none;
  border-radius: 10px;
  padding: 0.75rem 1.25rem;
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  touch-action: manipulation;
}

.landing-btn.primary {
  background: #4f46e5;
  color: #fff;
  box-shadow: 0 4px 14px rgb(79 70 229 / 0.35);
}

.landing-btn.primary:hover {
  background: #4338ca;
}

.landing-btn.ghost {
  background: rgb(255 255 255 / 0.12);
  color: #eef2ff;
  border: 1px solid rgb(255 255 255 / 0.2);
}

.landing-btn.light {
  background: #fff;
  color: #312e81;
  border: 1px solid #c7d2fe;
}

.landing-main {
  max-width: 56rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.landing-hero {
  text-align: center;
  padding: 1.5rem 0 2.5rem;
}

.landing-badge {
  display: inline-block;
  margin: 0 0 0.85rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: #eef2ff;
  border: 1px solid #c7d2fe;
  color: #4338ca;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.landing-hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 6vw, 2.75rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.landing-lead {
  margin: 0 auto 1.5rem;
  max-width: 36rem;
  font-size: clamp(1.05rem, 2.5vw, 1.2rem);
  color: #4338ca;
}

.landing-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 0.75rem;
}

.landing-note {
  margin: 0;
  font-size: 0.88rem;
  color: #6b7280;
}

.landing-pad-preview {
  margin: 2rem auto 0;
  max-width: 22rem;
  border-radius: 16px;
  overflow: hidden;
  border: 3px solid #312e81;
  box-shadow: 0 18px 40px rgb(49 46 129 / 0.18);
  background: #fff;
}

.landing-pad-top {
  background: #312e81;
  color: #eef2ff;
  padding: 0.65rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.landing-pad-body {
  padding: 1rem 0.85rem 1.25rem;
  min-height: 10rem;
  background:
    linear-gradient(#e5e7eb 1px, transparent 1px) 0 0 / 100% 1.75rem,
    #fff;
}

.landing-pad-problem {
  margin: 0 0 0.75rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.landing-pad-ink {
  margin: 0;
  font-family: "Segoe Script", "Bradley Hand", cursive;
  font-size: 1.35rem;
  color: #1e1b4b;
}

.landing-section {
  margin-bottom: 2.5rem;
}

.landing-section h2 {
  margin: 0 0 1rem;
  font-size: 1.35rem;
  text-align: center;
}

.landing-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  align-items: stretch;
}

@media (min-width: 520px) {
  .landing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .landing-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.landing-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: #fff;
  border: 1px solid #e0e7ff;
  border-radius: 12px;
  padding: 1.1rem 1rem;
}

.landing-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}

.landing-card p {
  margin: 0;
  font-size: 0.92rem;
  color: #4b5563;
}

.landing-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.85rem;
}

.landing-steps li {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  background: #fff;
  border: 1px solid #e0e7ff;
  border-radius: 12px;
  padding: 0.9rem 1rem;
}

.landing-step-num {
  flex-shrink: 0;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 999px;
  background: #eef2ff;
  color: #4338ca;
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.landing-pricing {
  text-align: center;
  background: #fff;
  border: 1px solid #e0e7ff;
  border-radius: 14px;
  padding: 1.5rem 1.25rem;
}

.landing-price {
  margin: 0 0 0.35rem;
  font-size: 1.75rem;
  font-weight: 700;
  color: #312e81;
}

.landing-pricing p {
  margin: 0 0 1rem;
  color: #4b5563;
}

.landing-footer {
  text-align: center;
  padding: 1.5rem 1.25rem calc(1.5rem + env(safe-area-inset-bottom, 0px));
  font-size: 0.85rem;
  color: #6b7280;
  border-top: 1px solid #e5e7eb;
}

.landing-section-lead {
  margin: -0.35rem 0 1.1rem;
  max-width: 40rem;
  color: #4b5563;
}

.practice-topic-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.practice-topic-links a {
  display: inline-block;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: #fff;
  border: 1px solid #c7d2fe;
  color: #4338ca;
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
}

.practice-topic-links a:hover {
  background: #eef2ff;
}

.practice-main {
  text-align: left;
}

.practice-hero {
  text-align: center;
}

.practice-samples-note {
  margin: -0.35rem 0 1rem;
  color: #4b5563;
}

.practice-problem-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.practice-problem-card {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  background: #fff;
  border: 1px solid #e0e7ff;
  border-radius: 12px;
  padding: 0.9rem 1rem;
}

.practice-problem-num {
  flex-shrink: 0;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 999px;
  background: #eef2ff;
  color: #4338ca;
  font-weight: 700;
  font-size: 0.82rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.practice-problem-body {
  min-width: 0;
  flex: 1;
}

.practice-prompt {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.45;
  overflow-x: auto;
}

.practice-track {
  margin: 0.35rem 0 0;
  font-size: 0.78rem;
  color: #6b7280;
}

.practice-more {
  padding-bottom: 2rem;
}

@media (min-width: 640px) {
  .landing-main {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}