/* CMU Thesis final case-study styles.
   Requires shared.css for header/footer/theme variables/guitar string.
*/

.cmu-case{background:var(--white);color:var(--black)}
.cmu-wrap{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}
.cmu-hero{min-height:calc(88vh - var(--header-h));padding:80px 0 88px;display:flex;flex-direction:column;justify-content:flex-end}
.cmu-eyebrow,.cmu-kicker,.cmu-diagram-title,.cmu-gallery-label,.cmu-sublabel{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--mid)}
.cmu-eyebrow{display:flex;justify-content:space-between;gap:24px;margin-bottom:24px}.cmu-sublabel{margin:0 0 18px}
.cmu-title{max-width:1180px;margin:0;font-size:clamp(52px,7vw,96px);line-height:.95;letter-spacing:-.03em;font-weight:500}
.cmu-subtitle{white-space:nowrap;margin:24px 0 0;font-size:1.5rem;line-height:1.02;letter-spacing:-.04em;font-weight:400;color:var(--mid)}
.cmu-hero-line{max-width:720px;margin:18px 0 0;color:var(--mid);font-size:18px;line-height:1.6}
.cmu-hero-media,.cmu-process-tile{overflow:hidden}
.cmu-hero-media{margin-top:56px;aspect-ratio:16/9;border:1px solid var(--line);border-radius:var(--radius-diagram);background:var(--accent-light)}
.cmu-hero-media img,.cmu-process-tile img,.cmu-video video{width:100%;height:100%;object-fit:cover;display:block}
.cmu-image img{width:100%;height:auto;display:block}

.cmu-section{padding:96px 0;border-top:1px solid var(--line)}.cmu-section.no-border{border-top:0}.cmu-section.compact{padding:64px 0}
.cmu-grid{display:grid;grid-template-columns:minmax(120px,.28fr) minmax(0,1fr);gap:48px}.cmu-kicker{position:sticky;top:calc(var(--header-h) + 24px)}.cmu-content{max-width:none}
.cmu-heading{margin:0 0 40px;font-size:clamp(34px,5.5vw,72px);line-height:1.02;letter-spacing:-.055em;font-weight:450}
.cmu-copy{font-size:clamp(18px,1.55vw,22px);line-height:1.62}.cmu-copy p,.cmu-content>p{margin:0 0 22px}.cmu-muted{color:var(--mid)}
.cmu-meta-grid{margin-top:42px;display:grid;grid-template-columns:repeat(4,1fr);gap:10px;font-size:14px}
.cmu-meta-card,.cmu-tool-card,.cmu-stat-card,.cmu-layer-card,.cmu-learning-card{border:1px solid var(--line);border-radius:var(--radius-card);background:var(--white)}
.cmu-meta-card{padding:16px;background:color-mix(in srgb,var(--white) 82%,var(--accent-light))}.cmu-meta-label{color:var(--mid);margin-bottom:8px}

.cmu-diagram{margin:36px 0 42px;border:1px solid var(--line);border-radius:var(--radius-diagram);padding:clamp(24px,4vw,44px);background:linear-gradient(135deg,var(--white) 0%,var(--accent-light) 100%)}
.cmu-diagram-title{margin-bottom:24px}
.cmu-layer-grid,.cmu-tool-grid,.cmu-image-grid,.cmu-stats-grid,.cmu-learning-grid{display:grid;gap:16px;align-items:start}
.cmu-layer-grid,.cmu-tool-grid,.cmu-stats-grid,.cmu-learning-grid{grid-template-columns:repeat(3,1fr)}.cmu-image-grid.two{grid-template-columns:repeat(2,1fr)}.cmu-image-grid.three{grid-template-columns:repeat(3,1fr)}
.cmu-layer-card,.cmu-tool-card,.cmu-learning-card{padding:22px}.cmu-layer-card.active,.cmu-tool-card.active{border:2px solid var(--accent);background:var(--accent-light)}
.cmu-layer-number,.cmu-tool-number{margin-bottom:30px;font-family:var(--mono);font-size:12px;color:var(--mid)}
.cmu-layer-title,.cmu-tool-title,.cmu-learning-title{margin-bottom:12px;font-size:23px;line-height:1.08;letter-spacing:-.04em}
.cmu-layer-card p,.cmu-tool-card p,.cmu-learning-card p{margin:0;color:var(--mid);font-size:14px;line-height:1.5}
.cmu-image{margin:42px 0}.cmu-image img{border:1px solid var(--line);border-radius:var(--radius-card);background:var(--accent-light);box-shadow:var(--shadow-card)}
.cmu-caption{margin-top:12px;color:var(--mid);font-size:14px;line-height:1.5}

.cmu-tool-list{display:grid;grid-template-columns:repeat(3,1fr);gap:46px 24px}.cmu-tool-item{min-width:0}
.cmu-video{position:relative;aspect-ratio:4/3;overflow:hidden;border-radius:var(--radius-card);border:1px solid var(--line);background:var(--accent-light);margin-bottom:16px;cursor:pointer}
.cmu-video video{width:100%;height:100%;object-fit:cover}
.cmu-tool-meta{display:flex;align-items:baseline;gap:10px;margin-bottom:10px}.cmu-tool-num{font-family:var(--mono);font-size:10px;color:var(--mid);letter-spacing:.06em}.cmu-tool-tag{font-size:10px;letter-spacing:.05em;text-transform:uppercase;color:var(--mid)}
.cmu-tool-item h3{margin:0 0 10px;font-size:18px;line-height:1.25;letter-spacing:-.02em}.cmu-tool-item p{margin:0;color:var(--mid);font-size:13px;line-height:1.65}

.vid-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.18);border:0;padding:0;cursor:pointer;transition:background .2s,opacity .2s;z-index:2}
.vid-btn svg{width:52px;height:52px;fill:#fff;filter:drop-shadow(0 2px 8px rgba(0,0,0,.35));transition:transform .15s}.vid-btn:hover svg{transform:scale(1.1)}.vid-btn .icon-pause{display:none}.vid-playing .vid-btn{background:transparent;opacity:0}.vid-playing:hover .vid-btn{opacity:1;background:rgba(0,0,0,.12)}.vid-playing .vid-btn .icon-play{display:none}.vid-playing .vid-btn .icon-pause{display:block}

.cmu-process-section{padding:48px 0 0}
.cmu-process-header{display:grid;grid-template-columns:minmax(220px,.42fr) minmax(0,1fr) auto;gap:24px;align-items:baseline;margin-bottom:24px}
.cmu-process-title{margin:0;font-size:clamp(24px,3vw,40px);line-height:1.05;letter-spacing:-.045em;font-weight:450}
.cmu-process-desc{margin:0;max-width:540px;color:var(--mid);font-size:14px;line-height:1.6}
.cmu-process-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.cmu-process-tile{aspect-ratio:4/3;background:var(--accent-light)}.cmu-process-tile.wide{grid-column:span 2;aspect-ratio:16/9}

.cmu-stat-card{padding:22px}.cmu-stat-value{margin-bottom:16px;font-size:clamp(56px,7vw,92px);line-height:.9;letter-spacing:-.08em}.cmu-stat-label{color:var(--mid);font-size:14px;line-height:1.5}
.cmu-final-shot{padding:0 0 104px}.cmu-final-shot .cmu-hero-media{margin-top:0}

@media(max-width:900px){.cmu-hero{min-height:auto;padding:48px 0 72px}.cmu-eyebrow{flex-direction:column;gap:8px}.cmu-grid,.cmu-process-header{grid-template-columns:1fr}.cmu-kicker{position:static}.cmu-meta-grid,.cmu-layer-grid,.cmu-tool-grid,.cmu-tool-list,.cmu-image-grid.two,.cmu-image-grid.three,.cmu-stats-grid,.cmu-learning-grid{grid-template-columns:1fr}.cmu-process-grid{grid-template-columns:repeat(2,1fr)}.cmu-process-tile.wide{grid-column:span 2}}
@media(max-width:560px){.cmu-process-grid{grid-template-columns:1fr}.cmu-process-tile.wide{grid-column:span 1;aspect-ratio:4/3}}