body {
  min-height: 100vh;
}

header {
  justify-content: space-between;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.header-login-link {
  color: var(--muted-light);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.15s;
}

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

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
}

section {
  width: 100%;
  max-width: 1100px;
  padding: 4rem 1.5rem;
}

.hero {
  text-align: center;
  padding-top: 5rem;
}

.hero-text {
  display: inline-block;
  text-align: left;
}

.hero h1 {
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.5;
  letter-spacing: 0.02em;
}

.hero-lead {
  margin-top: 1.5rem;
  color: var(--muted-light);
  font-size: 0.95rem;
  line-height: 1.9;
}

.hero-actions {
  margin-top: 2.25rem;
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.cta-btn,
.cta-btn-secondary {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.7rem 1.75rem;
  border-radius: 6px;
  transition:
    background 0.15s,
    border-color 0.15s;
}

.cta-btn {
  background: var(--primary);
  color: var(--white);
}

.cta-btn:hover {
  background: var(--primary-hv);
}

.cta-btn-secondary {
  color: var(--text);
  border: 1px solid var(--border);
}

.cta-btn-secondary:hover {
  border-color: var(--accent);
}

.problem,
.how-to-use {
  border-top: 1px solid var(--border);
}

.problem h2,
.how-to-use h2 {
  text-align: center;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 2.5rem;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.problem-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
}

.problem-icon {
  display: block;
  width: 24px;
  height: 24px;
  color: var(--accent);
  margin: 0 auto 0.8rem;
}

.problem-icon-group {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 0.5rem;
  min-height: 80px;
  margin-bottom: 0.8rem;
}

.problem-illustration {
  display: block;
  height: 54px;
  width: auto;
  margin: 0 auto 0.8rem;
}

.problem-icon-group .problem-illustration {
  margin: 0;
}

.problem-illustration-lg {
  height: 80px;
}

.problem-card p {
  color: var(--table-body-tx);
  font-size: 0.9rem;
  line-height: 1.7;
}

.step-list {
  list-style: none;
  max-width: 640px;
  margin: 0 auto;
}

.step-item {
  display: flex;
  gap: 1.25rem;
  padding-bottom: 2rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.step-item:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: none;
}

.step-number {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.95rem;
}

.step-body h3 {
  color: var(--white);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.step-body p {
  color: var(--table-body-tx);
  font-size: 0.88rem;
  line-height: 1.7;
}

.cta-final {
  text-align: center;
  border-top: 1px solid var(--border);
}

.cta-final h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 1.75rem;
}

footer {
  text-align: center;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border);
}

footer a {
  color: var(--muted-light);
  font-size: 0.8rem;
  text-decoration: none;
}

footer a:hover {
  color: var(--text);
}