:root {
  --bg: #f4eee3;
  --surface: rgba(255, 252, 247, 0.9);
  --text: #2f2921;
  --muted: #6e655b;
  --navy: #18354d;
  --orange-soft: #f2d9c9;
  --line: rgba(47, 41, 33, 0.12);
  --shadow: 0 20px 46px rgba(59, 43, 26, 0.1);
  --radius-xl: 32px;
  --font-display: "Georgia", "Times New Roman", serif;
  --font-body: "Microsoft YaHei UI", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(204, 106, 57, 0.18), transparent 24%),
    linear-gradient(180deg, #f8f2e9, #eee5d8);
  color: var(--text);
  font-family: var(--font-body);
}

body {
  padding: 28px;
}

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2 {
  margin: 0;
  font-family: var(--font-display);
}

.student-shell {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  gap: 22px;
}

.hero-card,
.practice-card {
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.65);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.hero-card {
  padding: 32px;
  display: grid;
  gap: 16px;
}

.eyebrow {
  margin: 0;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: rgba(24, 53, 77, 0.74);
}

.hero-copy,
.practice-card p,
.feature-list {
  margin: 0;
  line-height: 1.75;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.ghost-link,
.start-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  transition: transform 0.18s ease;
}

.ghost-link {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.start-link {
  background: var(--navy);
  color: #fff;
}

.ghost-link:hover,
.start-link:hover {
  transform: translateY(-1px);
}

.practice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.practice-card {
  padding: 26px;
  display: grid;
  gap: 16px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--orange-soft);
  color: #8c4723;
  font-size: 0.84rem;
}

.feature-list {
  padding-left: 18px;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.card-meta {
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 900px) {
  body {
    padding: 18px;
  }

  .practice-grid {
    grid-template-columns: 1fr;
  }

  .card-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .start-link {
    width: 100%;
  }
}