/* Catalyst Training Academy — shared styles
   Palette derived from catalystservicesuk.com (2026-04-14 scan):
     #1d0a42 navy-purple   primary dark
     #ee3087 magenta/pink  primary accent
     #5f6db3 purple-blue   secondary
     #8dc775 green         course tag
     #f0855e coral         course tag
     #6c757d neutral grey  text/borders
*/

:root {
  --navy: #1d0a42;
  --navy-2: #2a1656;
  --pink: #ee3087;
  --pink-2: #d51e75;
  --blue: #5f6db3;
  --green: #8dc775;
  --coral: #f0855e;
  --grey-900: #1a1a1a;
  --grey-700: #4a4a4a;
  --grey-500: #6c757d;
  --grey-200: #e6e6e9;
  --grey-100: #f4f4f7;
  --bg: #ffffff;
  --shadow-sm: 0 1px 3px rgba(29, 10, 66, 0.08);
  --shadow-md: 0 4px 16px rgba(29, 10, 66, 0.10);
  --shadow-lg: 0 12px 40px rgba(29, 10, 66, 0.18);
  --radius: 10px;
  --radius-lg: 16px;
  --max-w: 1200px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  color: var(--grey-900);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--pink); text-decoration: none; }
a:hover { color: var(--pink-2); text-decoration: underline; }

h1, h2, h3, h4 { color: var(--navy); margin: 0 0 0.5em; line-height: 1.2; font-weight: 600; }
h1 { font-size: 2.4rem; }
h2 { font-size: 1.7rem; margin-top: 2em; }
h3 { font-size: 1.2rem; }

p { margin: 0 0 1em; }

/* Nav — !important on key visual properties so per-portal stylesheets
   (WRc, Percolation) can't keep their old navy gradient nav */
.nav {
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  gap: 1.5rem !important;
  max-width: none !important;
  margin: 0 !important;
  padding: 1rem 1.5rem !important;
  background: white !important;
  border-bottom: 1px solid var(--grey-200) !important;
  color: var(--navy) !important;
  position: static !important;
  box-shadow: none !important;
}
.nav-brand,
.nav a.nav-brand {
  display: flex !important;
  align-items: center !important;
  gap: 0.75rem !important;
  text-decoration: none !important;
  color: var(--navy) !important;
  font-weight: 600 !important;
  background: transparent !important;
}
.nav-brand img { height: 36px !important; width: auto !important; display: block !important; }
.nav-brand-mark { display: none !important; }  /* legacy from migrated portals */
.nav-links { display: flex !important; gap: 1.25rem !important; align-items: center !important; }
.nav-links a {
  color: var(--grey-700) !important;
  font-size: 0.95rem !important;
  font-weight: 500 !important;
  text-decoration: none !important;
  background: transparent !important;
}
.nav-links a:hover { color: var(--pink) !important; }
.nav-progress { font-size: 0.85rem !important; color: var(--grey-500) !important; display: inline-flex !important; align-items: center !important; gap: 0.5rem !important; }
.nav-progress-bar {
  display: inline-block !important;
  width: 120px !important;
  height: 6px !important;
  background: var(--grey-200) !important;
  border-radius: 3px !important;
  vertical-align: middle !important;
  margin-left: 0.5rem !important;
  overflow: hidden !important;
}
.nav-progress-fill { height: 100% !important; background: var(--pink) !important; transition: width 0.3s ease !important; }
.nav-progress-text { color: var(--grey-500) !important; }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 60%, var(--blue) 130%);
  color: white;
  padding: 4rem 1.5rem 5rem;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -40%;
  right: -10%;
  width: 60%;
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(238, 48, 135, 0.18) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.hero h1 { color: white; font-size: 2.8rem; max-width: 880px; }
.hero h1 .accent { color: var(--pink); display: block; font-size: 0.7em; font-weight: 400; margin-top: 0.4em; }
.hero .lead { color: rgba(255, 255, 255, 0.85); font-size: 1.15rem; max-width: 760px; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 2.5rem; margin-top: 2.5rem; }
.hero-stat-value { font-size: 2rem; font-weight: 700; color: var(--pink); }
.hero-stat-label { font-size: 0.9rem; color: rgba(255, 255, 255, 0.75); text-transform: uppercase; letter-spacing: 0.05em; }

/* Main content */
main { max-width: var(--max-w); margin: 0 auto; padding: 0 1.5rem 4rem; }
section { margin-top: 3rem; }

/* Callouts */
.callout {
  border-left: 4px solid var(--pink);
  background: var(--grey-100);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius);
  margin: 1.5rem 0;
}
.callout.info { border-left-color: var(--blue); }
.callout.warn { border-left-color: var(--coral); }
.callout-title { font-weight: 600; color: var(--navy); margin-bottom: 0.5em; }
.callout ul { margin: 0; padding-left: 1.25rem; }

/* Course grid */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}
.course-card {
  background: white;
  border: 1px solid var(--grey-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  position: relative;
  overflow: hidden;
}
.course-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.course-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--accent, var(--pink));
}
.course-card[data-accent="pink"] { --accent: var(--pink); }
.course-card[data-accent="blue"] { --accent: var(--blue); }
.course-card[data-accent="green"] { --accent: var(--green); }
.course-card[data-accent="coral"] { --accent: var(--coral); }
.course-card[data-accent="navy"] { --accent: var(--navy); }
.course-card-num {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent, var(--pink));
  color: white;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.95rem;
}
.course-card-title { font-size: 1.15rem; font-weight: 600; color: var(--navy); margin: 0; }
.course-card-desc { color: var(--grey-700); font-size: 0.95rem; flex-grow: 1; margin: 0; }
.course-card-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--grey-500);
  padding-top: 0.5rem;
  border-top: 1px solid var(--grey-200);
}
.course-card-status {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.6rem;
  border-radius: 99px;
  font-weight: 600;
}
.course-card-status[data-status="ready"] { background: rgba(141, 199, 117, 0.18); color: #4d7935; }
.course-card-status[data-status="building"] { background: rgba(95, 109, 179, 0.18); color: var(--blue); }
.course-card-status[data-status="planned"] { background: var(--grey-200); color: var(--grey-500); }
.course-card-cta {
  display: inline-block;
  margin-top: 0.75rem;
  font-weight: 600;
  color: var(--pink);
}
.course-card-cta:hover { color: var(--pink-2); text-decoration: none; }
.course-card-cta::after { content: " →"; }

/* Tier badges (Core / Expert) */
.tier-badge {
  display: inline-block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
  margin-right: 0.5rem;
  vertical-align: middle;
}
.tier-badge.core { background: var(--pink); color: white; }
.tier-badge.expert { background: var(--navy); color: white; }

/* Resource grid */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.resource-tile {
  background: var(--grey-100);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-decoration: none;
  color: var(--navy);
  transition: background 0.15s ease;
}
.resource-tile:hover { background: var(--grey-200); text-decoration: none; }
.resource-tile-title { font-weight: 600; margin-bottom: 0.25rem; }
.resource-tile-desc { font-size: 0.9rem; color: var(--grey-700); }

/* Footer */
footer {
  background: var(--navy);
  color: rgba(255, 255, 255, 0.75);
  padding: 2rem 1.5rem;
  margin-top: 4rem;
  font-size: 0.9rem;
}
footer a { color: var(--pink); }
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Utility */
.muted { color: var(--grey-500); }
.small { font-size: 0.9rem; }
.center { text-align: center; }

/* ----- Quiz engine (used by modules + capstones) ----- */
.cta-quiz { background: var(--grey-100); padding: 1.5rem; border-radius: var(--radius-lg); margin: 2rem 0; }
.cta-quiz-q { padding: 1rem 0; border-bottom: 1px solid var(--grey-200); }
.cta-quiz-q:last-of-type { border-bottom: none; }
.cta-quiz-q strong { display: block; color: var(--navy); margin-bottom: 0.6rem; font-size: 1rem; line-height: 1.45; }
.cta-quiz-q label { display: block; padding: 0.4rem 0.6rem; cursor: pointer; border-radius: var(--radius); transition: background 0.1s ease; }
.cta-quiz-q label:hover { background: rgba(238, 48, 135, 0.06); }
.cta-quiz-q input { margin-right: 0.5rem; }

.cta-btn { display: inline-block; padding: 0.7rem 1.4rem; border-radius: var(--radius); font-weight: 600; cursor: pointer; font-size: 0.95rem; border: 0; text-decoration: none; }
.cta-btn-pink { background: var(--pink); color: white; }
.cta-btn-pink:hover { background: var(--pink-2); color: white; text-decoration: none; }
.cta-btn-outline { background: transparent; color: var(--navy); border: 1.5px solid var(--grey-200); }
.cta-btn-outline:hover { border-color: var(--pink); color: var(--pink); text-decoration: none; }

.cta-quiz-result { margin-top: 1.5rem; }
.cta-result-head { padding: 1rem 1.25rem; border-radius: var(--radius); display: flex; gap: 1rem; align-items: center; margin-bottom: 1rem; }
.cta-result-head.pass { background: rgba(141, 199, 117, 0.18); color: #4d7935; }
.cta-result-head.fail { background: rgba(240, 133, 94, 0.18); color: #a04020; }
.cta-result-score { font-size: 1.6rem; font-weight: 700; }
.cta-result-score span { font-size: 0.95rem; opacity: 0.75; }
.cta-result-msg { font-weight: 600; }
.cta-fb-list { display: flex; flex-direction: column; gap: 0.85rem; margin-bottom: 1rem; }
.cta-fb-q { padding: 0.85rem 1rem; border-radius: var(--radius); border-left: 4px solid var(--grey-200); background: white; }
.cta-fb-q.fb-right { border-left-color: var(--green); }
.cta-fb-q.fb-wrong { border-left-color: var(--coral); }
.cta-fb-head { font-weight: 600; color: var(--navy); margin-bottom: 0.4rem; }
.cta-fb-you { font-size: 0.9rem; color: #a04020; margin-top: 0.2rem; }
.cta-fb-correct { font-size: 0.95rem; color: #4d7935; margin-top: 0.2rem; }
.cta-fb-why { font-size: 0.9rem; color: var(--grey-700); margin-top: 0.5rem; padding-top: 0.5rem; border-top: 1px dashed var(--grey-200); }
.cta-fb-ref { font-size: 0.9rem; margin-top: 0.4rem; }
.cta-fb-ref a { color: var(--pink); }
.cta-result-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; align-items: center; }

/* ----- Identity modal ----- */
.cta-modal-backdrop { position: fixed; inset: 0; background: rgba(29, 10, 66, 0.55); z-index: 9999; display: flex; align-items: center; justify-content: center; padding: 1rem; backdrop-filter: blur(2px); }
.cta-modal { background: white; border-radius: var(--radius-lg); padding: 2rem; max-width: 460px; width: 100%; box-shadow: var(--shadow-lg); }
.cta-modal h2 { margin: 0 0 0.5rem; }
.cta-modal p { color: var(--grey-700); margin-bottom: 1rem; }
.cta-modal input { width: 100%; padding: 0.7rem 0.85rem; border: 1.5px solid var(--grey-200); border-radius: var(--radius); font-size: 1rem; box-sizing: border-box; }
.cta-modal input:focus { outline: none; border-color: var(--pink); box-shadow: 0 0 0 3px rgba(238, 48, 135, 0.15); }
.cta-modal-actions { display: flex; gap: 0.75rem; margin-top: 1.25rem; }

/* ----- Personal dashboard ----- */
.cta-dash-rings { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin: 1.5rem 0; }
.cta-dash-ring { background: white; border: 1px solid var(--grey-200); border-radius: var(--radius-lg); padding: 1.25rem; text-align: center; }
.cta-dash-ring-value { font-size: 2.2rem; font-weight: 700; color: var(--navy); line-height: 1; }
.cta-dash-ring-label { font-size: 0.8rem; color: var(--grey-500); text-transform: uppercase; letter-spacing: 0.06em; margin-top: 0.4rem; }
.cta-progress-bar { height: 8px; background: var(--grey-200); border-radius: 4px; overflow: hidden; margin: 0.4rem 0; }
.cta-progress-bar > div { height: 100%; background: linear-gradient(90deg, var(--pink), var(--blue)); transition: width 0.3s ease; }

.cta-cert-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; margin: 1rem 0; }
.cta-cert-card { background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 100%); color: white; border-radius: var(--radius-lg); padding: 1.5rem; }
.cta-cert-card h3 { color: white; margin: 0 0 0.5rem; }
.cta-cert-card .cta-cert-meta { font-size: 0.85rem; opacity: 0.8; margin-bottom: 0.75rem; }
.cta-cert-card a { color: var(--pink); font-weight: 600; }

/* ----- AI helper FAB ----- */
.cta-ai-fab { position: fixed !important; bottom: 1.5rem !important; right: 1.5rem !important; left: auto !important; top: auto !important; background: var(--pink) !important; color: white !important; padding: 0.85rem 1.25rem !important; border-radius: 999px !important; font-weight: 600 !important; box-shadow: var(--shadow-lg) !important; display: inline-flex !important; align-items: center !important; gap: 0.5rem !important; cursor: pointer; border: 0 !important; font-size: 0.95rem !important; z-index: 9998 !important; opacity: 0.92; transition: opacity 0.15s ease, transform 0.15s ease; margin: 0 !important; }
.cta-ai-fab:hover { opacity: 1; transform: translateY(-1px); }
.cta-ai-fab.disabled { background: var(--grey-500); cursor: not-allowed; }

/* ----- AI chat panel (uses !important on critical positioning so bespoke
   per-portal stylesheets — eg. WRc, Percolation — can't push it into the
   document flow accidentally) ----- */
.cta-ai-panel { position: fixed !important; top: 0 !important; right: 0 !important; bottom: 0 !important; width: 100% !important; max-width: 460px !important; height: 100vh !important; background: white !important; box-shadow: var(--shadow-lg) !important; display: flex !important; flex-direction: column !important; z-index: 9999 !important; transform: translateX(100%); transition: transform 0.25s ease; border-left: 1px solid var(--grey-200); margin: 0 !important; padding: 0 !important; }
.cta-ai-panel.open { transform: translateX(0) !important; }
.cta-ai-panel[aria-hidden="true"] { pointer-events: none; }
.cta-ai-panel.open[aria-hidden="false"] { pointer-events: auto; }

.cta-ai-panel-head { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; padding: 0.85rem 1rem; background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 100%); color: white; }
.cta-ai-panel-head strong { font-size: 1rem; }
.cta-ai-panel-actions { display: flex; gap: 0.25rem; }
.cta-ai-icon-btn { background: rgba(255,255,255,0.1); color: white; border: 0; width: 32px; height: 32px; border-radius: 999px; cursor: pointer; font-size: 0.95rem; display: inline-flex; align-items: center; justify-content: center; }
.cta-ai-icon-btn:hover { background: rgba(255,255,255,0.2); }

.cta-ai-panel-body { flex: 1 1 auto; overflow-y: auto; padding: 1rem; background: var(--grey-100); display: flex; flex-direction: column; gap: 0.85rem; }
.cta-ai-msg { padding: 0.75rem 1rem; border-radius: var(--radius); max-width: 92%; font-size: 0.93rem; line-height: 1.5; }
.cta-ai-msg p { margin: 0 0 0.5em; }
.cta-ai-msg p:last-child { margin-bottom: 0; }
.cta-ai-msg ul, .cta-ai-msg ol { margin: 0.4em 0 0.5em; padding-left: 1.25rem; }
.cta-ai-msg code { background: rgba(29,10,66,0.06); padding: 0.05em 0.35em; border-radius: 4px; font-size: 0.88em; }
.cta-ai-msg-user { background: var(--pink); color: white; align-self: flex-end; }
.cta-ai-msg-user code { background: rgba(255,255,255,0.18); }
.cta-ai-msg-bot { background: white; border: 1px solid var(--grey-200); align-self: flex-start; }
.cta-ai-msg-bot a { color: var(--pink); font-weight: 600; }
.cta-ai-suggest { list-style: none; padding-left: 0; margin: 0.5rem 0 0; display: flex; flex-direction: column; gap: 0.4rem; }
.cta-ai-suggest a { display: block; padding: 0.5rem 0.75rem; background: var(--grey-100); border-radius: var(--radius); color: var(--navy); text-decoration: none; font-size: 0.88rem; transition: background 0.1s ease; }
.cta-ai-suggest a:hover { background: rgba(238, 48, 135, 0.12); color: var(--pink); }
.cta-ai-usage { margin-top: 0.5rem; padding-top: 0.5rem; border-top: 1px dashed var(--grey-200); }

.cta-ai-fb { display: flex; align-items: center; gap: 0.4rem; flex-wrap: wrap; margin-top: 0.65rem; padding-top: 0.55rem; border-top: 1px solid var(--grey-200); font-size: 0.82rem; color: var(--grey-500); }
.cta-ai-fb-label { margin-right: 0.25rem; }
.cta-ai-fb-btn { background: white; border: 1px solid var(--grey-200); color: var(--navy); padding: 0.2rem 0.55rem; border-radius: 999px; cursor: pointer; font-size: 0.85rem; line-height: 1; transition: background 0.1s ease, border-color 0.1s ease; }
.cta-ai-fb-btn:hover { background: var(--grey-100); border-color: var(--pink); }
.cta-ai-fb-btn.cta-ai-fb-flag { font-size: 0.75rem; color: var(--coral); border-color: rgba(240,133,94,0.4); }
.cta-ai-fb-btn.cta-ai-fb-flag:hover { background: rgba(240,133,94,0.08); border-color: var(--coral); }
.cta-ai-fb-thanks { color: var(--green); font-weight: 500; }
.cta-ai-cursor { display: inline-block; width: 0.5em; height: 1em; vertical-align: text-bottom; background: var(--pink); margin-left: 2px; animation: cta-blink 1s steps(2) infinite; }
@keyframes cta-blink { 50% { opacity: 0; } }

.cta-ai-panel-foot { display: flex; gap: 0.5rem; padding: 0.85rem 1rem; border-top: 1px solid var(--grey-200); background: white; }
.cta-ai-panel-foot textarea { flex: 1 1 auto; padding: 0.55rem 0.75rem; border: 1.5px solid var(--grey-200); border-radius: var(--radius); resize: none; font-family: inherit; font-size: 0.95rem; }
.cta-ai-panel-foot textarea:focus { outline: none; border-color: var(--pink); }
.cta-ai-panel-foot button { padding: 0.55rem 1rem; flex: 0 0 auto; }

.cta-ai-panel-mode { padding: 0.4rem 1rem; background: var(--grey-100); font-size: 0.75rem; color: var(--grey-500); text-align: center; border-top: 1px solid var(--grey-200); }
.cta-ai-mode-pill { display: inline-block; padding: 0.1rem 0.6rem; border-radius: 999px; font-weight: 600; }
.cta-ai-mode-pill.mode-proxy { background: rgba(141, 199, 117, 0.2); color: #4d7935; }
.cta-ai-mode-pill.mode-direct { background: rgba(95, 109, 179, 0.18); color: var(--blue); }
.cta-ai-mode-pill.mode-warn { background: rgba(240, 133, 94, 0.2); color: #a04020; }

@media (max-width: 720px) {
  .cta-ai-panel { max-width: 100%; }
  .cta-ai-fab { bottom: 1rem; right: 1rem; padding: 0.7rem 1rem; font-size: 0.9rem; }
}

/* ----- User badge in nav ----- */
.cta-user-badge { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.3rem 0.75rem; border-radius: 999px; background: var(--grey-100); color: var(--navy); font-size: 0.85rem; font-weight: 500; text-decoration: none; }
.cta-user-badge:hover { background: var(--grey-200); text-decoration: none; }
.cta-user-badge::before { content: "👤"; font-size: 0.95rem; }

/* ----- Print certificate ----- */
@media print {
  body { background: white; }
  .nav, footer, .cta-ai-fab, .no-print { display: none !important; }
  .cert-page { page-break-inside: avoid; }
}
.cert-page { background: white; max-width: 900px; margin: 2rem auto; padding: 3rem 4rem; border: 12px double var(--navy); border-radius: var(--radius-lg); position: relative; }
.cert-page::before { content: ""; position: absolute; inset: 6px; border: 2px solid var(--pink); border-radius: var(--radius); pointer-events: none; }
.cert-page h1 { font-size: 2.5rem; color: var(--navy); margin: 0 0 0.5rem; }
.cert-page .cert-academy { color: var(--pink); font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; font-size: 0.95rem; }
.cert-page .cert-name { font-size: 2.2rem; color: var(--navy); font-weight: 700; margin: 1.5rem 0 0.25rem; }
.cert-page .cert-line { color: var(--grey-700); }
.cert-page .cert-course { font-size: 1.4rem; color: var(--navy); font-weight: 600; margin: 1rem 0; }
.cert-page .cert-footer { display: flex; justify-content: space-between; margin-top: 2.5rem; padding-top: 1rem; border-top: 1px solid var(--grey-200); font-size: 0.9rem; color: var(--grey-500); }
.cert-page .cert-logo { height: 60px; margin-bottom: 1rem; }

/* ----- Responsive ----- */
@media (max-width: 720px) {
  h1 { font-size: 1.9rem; }
  .hero { padding: 2.5rem 1.25rem 3rem; }
  .hero h1 { font-size: 2rem; }
  .nav { flex-wrap: wrap; gap: 0.75rem 1rem; padding: 0.85rem 1rem; }
  .nav-links { gap: 0.85rem; }
  .nav-progress { display: none; }
  .hero-stats { gap: 1.5rem; }
  .hero-stat-value { font-size: 1.5rem; }
  .cta-modal { padding: 1.5rem; }
  .cta-modal-actions { flex-direction: column; }
  .cta-modal-actions .cta-btn { width: 100%; text-align: center; }
  main { padding: 0 1rem 3rem; }
  .course-grid { grid-template-columns: 1fr; }
  .cert-page { padding: 2rem 1.5rem; margin: 1rem; }
  .cert-page h1 { font-size: 1.8rem; }
  .cert-page .cert-name { font-size: 1.6rem; }
}