:root {
  --link-accent: #6192ff;
  --link-accent-visited: #a77cff;
  --cols: 3;
  --gap: 1.25rem;
}

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

html, body { height: 100%; }

body {
  margin: 0;
  background: #181818;
  color: #fff;
  font-family: Inter, Arial, sans-serif;
  padding: 2rem 2rem 3rem;
}

/* return icon */
.return-icon {
  position: fixed;
  top: 20px;
  left: 20px;
  color: #fff;
  text-decoration: none;
  font-size: 1.8rem;
  z-index: 100;
  text-shadow: 0 2px 6px rgba(0,0,0,.6);
  transition: transform .2s ease;
}
.return-icon:hover { transform: scale(1.12); }

/* watermark */
.watermark-group {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  text-align: center;
  line-height: 1.4;
  white-space: nowrap;
}
.watermark {
  text-shadow: 0 0 6px rgba(0,0,0,.4);
  backdrop-filter: blur(1px);
  font-size: 1.1rem;
  color: rgba(255,255,255,.32);
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* page content */
.studies-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 140px 0 40px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}
@media (max-width: 600px) { .studies-container { padding-top: 100px; } }

.studies-intro {
  max-width: 680px;
  margin: 0 auto 8px;
  padding: 0 20px;
  text-align: center;
  font-size: 1rem;
  line-height: 1.65;
  color: #ccc;
  opacity: .78;
}

/* fluid columns */
#practice-grid {
  width: 100%;                 /* ensure it spans the container */
  display: flex;
  gap: var(--gap);
  align-items: flex-start;
  max-width: 1200px;
  margin: 0 auto 3rem;
  padding: 0 20px;
}

.column {
  flex: 0 0 calc((100% - (var(--cols) - 1) * var(--gap)) / var(--cols));
  display: flex;
  flex-direction: column;
  gap: var(--gap);
  min-width: 0;                /* prevent overflow from long words/images */
}

/* cards */
.practice-card {
  background: #fff;
  color: #000;
  border-radius: 10px;
  box-shadow: 0 8px 18px rgba(0,0,0,.18);
  padding: 18px 18px 16px;
  transition: transform .22s ease, box-shadow .22s ease;
  cursor: pointer;
  display: flex;
  flex-direction: column;
}
.practice-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(0,0,0,.22);
}

/* header */
.practice-card h3 {
  margin: 0 0 .35rem 0;
  font-size: 1.05rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.expand-icon {
  margin-left: auto;
  font-size: 1.1rem;
  line-height: 1;
  color: #888;
  transition: color .2s ease, transform .2s ease;
}
.practice-card.expanded .expand-icon { color: #000; }

/* meta */
.practice-card small {
  display: block;
  color: #444;
  margin-bottom: .25rem;
}

/* body */
.card-body { margin-top: .25rem; }
.practice-card p,
.practice-card a,
.practice-card blockquote {
  font-size: .98rem;
  line-height: 1.7;
  margin: .5rem 0 0;
  color: #000;
  white-space: pre-line;
}
.practice-card a {
  color: #1a4bff;
  text-decoration: underline;
}
.practice-card a:visited { color: var(--link-accent-visited); }
.practice-card img {
  width: 100%;
  height: auto;
  border-radius: 6px;
  margin-top: .6rem;
  display: block;
}
.practice-card blockquote {
  font-style: italic;
  opacity: .9;
  border-left: 3px solid #eee;
  padding-left: .75rem;
  margin-left: .1rem;
}
.practice-card blockquote small {
  display: block;
  font-style: normal;
  font-size: .85rem;
  margin-top: .3rem;
  color: #333;
}