/* Sigmund Freud. Cream cards on the dark stage; a red slip. */
:root { --sf-card: #F3E6C8; --sf-ink: #2A1E10; --sf-red: #E0473E; --sf-shock: #FCC050; --sf-flirt: #FF7FA8; }

.hero.sf-photo img { width: 200px; border-radius: 16px; filter: grayscale(1) contrast(1.05) drop-shadow(0 18px 30px rgba(0,0,0,.5)); }

/* kinds of mistake, and the speaker */
.sf-kinds { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; padding: 10px 0; }
.sf-kinds span { padding: 10px 14px; border-radius: 4px; background: var(--sf-card); color: var(--sf-ink); font: 700 16px var(--serif); box-shadow: 0 4px 8px rgba(0,0,0,.45); animation: sfPin .45s cubic-bezier(.34,1.56,.64,1) both; animation-delay: var(--d); }
.sf-kinds span:nth-child(odd) { transform: rotate(-2deg); } .sf-kinds span:nth-child(even) { transform: rotate(1.5deg); }
@keyframes sfPin { from { opacity: 0; translate: 0 12px; } to { opacity: 1; translate: 0 0; } }
.sf-speak { position: relative; display: flex; justify-content: flex-end; padding-top: 8px; }
.sf-speak img { width: 250px; max-width: 72%; filter: drop-shadow(0 16px 26px rgba(0,0,0,.5)); }
.sf-bub { position: absolute; left: 0; top: 0; max-width: 46%; padding: 10px 12px; border-radius: 14px 14px 14px 4px; background: #fff; color: #1b1b1b; font: 600 italic 16px/1.2 var(--serif); box-shadow: 0 6px 16px rgba(0,0,0,.4); }
.sf-bub b { color: var(--sf-red); }
@media (max-height: 700px) { .sf-speak img { width: 210px; } }

/* the lab: a word pair whose first sounds swap */
.sf-lab { display: grid; place-items: center; gap: 12px; padding: 16px 0; }
.sf-pair { display: flex; gap: 18px; padding: 18px 22px; border-radius: 14px; background: var(--sf-card); color: var(--sf-ink); box-shadow: 0 8px 20px rgba(0,0,0,.45); font: 800 34px/1 var(--serif); }
.sf-pw { display: flex; }
.sf-on { display: inline-block; color: var(--violet-deep); }
.sf-flipped .sf-on { color: var(--sf-red); }
.sf-flipped { box-shadow: 0 0 0 3px var(--sf-red), 0 8px 20px rgba(0,0,0,.45); }
.sf-paircap { order: -1; font: 700 12px var(--sans); letter-spacing: .06em; text-transform: uppercase; color: var(--dim); }

/* two groups, then the sketch */
.sf-test { position: relative; width: 100%; max-width: 380px; margin: 0 auto; }
.sf-groups { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; transition: opacity .4s, height .4s; }
.sf-grp { padding: 14px 12px 16px; border-radius: 14px; background: var(--surface); border: 2px solid var(--line); font: 500 13.5px/1.3 var(--sans); color: var(--dim); }
.sf-grp b { display: block; margin: 6px 0 2px; color: var(--text); font-size: 15px; }
.sf-ico svg { width: 40px; height: 40px; }
.sf-g1 .sf-ico svg { fill: var(--sf-shock); } .sf-g2 .sf-ico svg { fill: var(--sf-flirt); }
.sf-groups.dim { display: none; }
.sf-chart { display: none; padding: 12px 14px; border-radius: 14px; background: var(--surface); border: 2px solid var(--line); }
.sf-chart.on { display: block; }
.sf-row { display: grid; grid-template-columns: 70px 1fr; align-items: center; gap: 8px; margin: 6px 0; }
.sf-rl { font: 700 13px var(--sans); color: var(--text); }
.sf-bars { display: grid; gap: 4px; }
.sf-bars i { display: block; height: 11px; border-radius: 6px; width: 0; transition: width .9s cubic-bezier(.2,.8,.2,1); }
.sf-chart.on .sf-bars i { width: var(--v); }
.sf-bars .z { background: var(--sf-shock); } .sf-bars .h { background: var(--sf-flirt); transition-delay: .15s; }
.sf-key { display: flex; flex-wrap: wrap; gap: 4px 14px; margin-top: 10px; font: 600 12px var(--sans); color: var(--dim); }
.sf-key span::before { content: ""; display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 5px; vertical-align: -1px; }
.sf-key .z::before { background: var(--sf-shock); } .sf-key .h::before { background: var(--sf-flirt); }
.sf-key em { flex-basis: 100%; font-style: italic; color: var(--faint); }