/* ===== VITA Diagnostics — Global Styles ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* MRT palette */
  --mrt-dark:    #0f2340;
  --mrt-mid:     #1a3a6c;
  --mrt-accent:  #5ba4e8;
  --mrt-light:   #e8f2fd;

  /* Dental CT palette */
  --dent-dark:   #0a2318;
  --dent-mid:    #165235;
  --dent-accent: #4ecb8d;
  --dent-light:  #e6f7f0;

  /* Neutrals */
  --white:    #ffffff;
  --bg:       #f8f9fa;
  --text:     #1a1a2e;
  --muted:    #6b7a8d;
  --border:   #dee2e6;

  --radius:   10px;
  --shadow:   0 4px 24px rgba(0,0,0,.10);
  --transition: .3s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--white);
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: var(--radius);
  font-weight: 600; font-size: 15px; text-decoration: none;
  cursor: pointer; border: none; transition: all var(--transition);
  letter-spacing: .02em;
}
.btn--mrt {
  background: var(--mrt-accent); color: #fff;
}
.btn--mrt:hover { background: #4a93d7; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(91,164,232,.35); }
.btn--dent {
  background: var(--dent-accent); color: #fff;
}
.btn--dent:hover { background: #3dba7c; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(78,203,141,.35); }
.btn--outline-white {
  background: transparent; color: #fff;
  border: 2px solid rgba(255,255,255,.6);
}
.btn--outline-white:hover { border-color: #fff; background: rgba(255,255,255,.1); }
.btn--white {
  background: #fff; color: var(--text); font-weight: 700;
}

/* Section title */
.section-title {
  font-size: 28px; font-weight: 700; margin-bottom: 36px;
  padding-bottom: 14px;
  border-bottom: 3px solid currentColor;
  display: inline-block;
}
.section-title--mrt { color: var(--mrt-mid); border-color: var(--mrt-accent); }
.section-title--dent { color: var(--dent-mid); border-color: var(--dent-accent); }

/* Inner page header */
.inner-header {
  padding: 18px 0;
  display: flex; align-items: center; justify-content: space-between;
}
.back-link {
  display: inline-flex; align-items: center; gap: 8px;
  text-decoration: none; font-weight: 500; font-size: 14px;
  opacity: .85; transition: opacity var(--transition);
}
.back-link:hover { opacity: 1; }
.other-link {
  font-size: 14px; text-decoration: none; font-weight: 500;
  padding: 8px 18px; border-radius: 6px; transition: all var(--transition);
}