.g-hall-resonance{--hor-border:rgba(20,35,45,.16);--hor-text:#24323a;--hor-muted:#65727a;--hor-soft:#f4f7f7;--hor-panel:#ffffff;--hor-accent:#8a744f;max-width:var(--hor-max-width,1180px);margin:0 auto;color:var(--hor-text);font-family:inherit}.g-hall-resonance *{box-sizing:border-box}.hor-shell{background:linear-gradient(180deg,#fbfcfc,#f3f6f5);border:1px solid var(--hor-border);border-radius:20px;padding:clamp(20px,4vw,42px)}.hor-header{text-align:center;max-width:820px;margin:0 auto 28px}.hor-kicker{text-transform:uppercase;letter-spacing:.24em;font-size:.72rem;color:var(--hor-muted);margin-bottom:7px}.hor-header h2{margin:0;font-size:clamp(2rem,4vw,3.4rem);font-weight:400;letter-spacing:.02em}.hor-subtitle{font-size:clamp(1rem,2vw,1.25rem);margin:8px 0;color:#4d5a61}.hor-intro{max-width:720px;margin:15px auto 0;color:var(--hor-muted)}.hor-toolbar{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding:14px 0 18px;border-top:1px solid var(--hor-border);border-bottom:1px solid var(--hor-border)}.hor-mode-switch,.hor-audio-controls{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.hor-mode,.hor-stop{border:1px solid var(--hor-border);background:#fff;color:var(--hor-text);padding:9px 14px;border-radius:999px;cursor:pointer;font:inherit}.hor-mode.is-active{background:#27353c;color:#fff}.hor-volume-label{display:flex;align-items:center;gap:7px;color:var(--hor-muted);font-size:.9rem}.hor-volume-label input{width:110px}.hor-field{display:grid;grid-template-columns:minmax(220px,360px) 1fr;align-items:center;gap:clamp(22px,5vw,60px);padding:36px 0}.hor-visual{position:relative;aspect-ratio:1/1;max-width:340px;width:100%;margin:auto}.hor-ring,.hor-core{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);border-radius:50%;pointer-events:none}.hor-ring{border:1px solid rgba(68,91,101,.2)}.ring-1{width:46%;height:46%}.ring-2{width:68%;height:68%}.ring-3{width:90%;height:90%}.hor-core{width:18%;height:18%;background:radial-gradient(circle,#fff 0%,#c9d8dc 32%,#7f979e 72%,#61737a 100%);box-shadow:0 0 30px rgba(95,123,133,.24)}.hor-visual.is-sounding .ring-1{animation:horPulse 2.8s ease-out infinite}.hor-visual.is-sounding .ring-2{animation:horPulse 2.8s ease-out .55s infinite}.hor-visual.is-sounding .ring-3{animation:horPulse 2.8s ease-out 1.1s infinite}.hor-visual.is-interval .hor-core{box-shadow:-18px 0 28px rgba(95,123,133,.18),18px 0 28px rgba(138,116,79,.18)}@keyframes horPulse{0%{transform:translate(-50%,-50%) scale(.82);opacity:.18}45%{opacity:.72}100%{transform:translate(-50%,-50%) scale(1.08);opacity:.06}}.hor-now{text-align:left}.hor-now-label{display:block;text-transform:uppercase;letter-spacing:.16em;font-size:.7rem;color:var(--hor-muted);margin-bottom:8px}.hor-now strong{display:block;font-size:clamp(1.65rem,3vw,2.65rem);font-weight:400}.hor-now small{display:block;margin-top:8px;color:var(--hor-muted);font-size:.95rem}.hor-section{padding-top:30px;border-top:1px solid var(--hor-border);margin-top:8px}.hor-section-heading{max-width:780px;margin-bottom:18px}.hor-section-heading h3{margin:0 0 5px;font-size:1.35rem}.hor-section-heading p{margin:0;color:var(--hor-muted)}.hor-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.hor-grid-intervals{grid-template-columns:repeat(3,minmax(0,1fr))}.hor-card{min-width:0;width:100%;height:auto!important;min-height:190px;max-height:none!important;overflow:visible!important;white-space:normal!important;display:flex;flex-direction:column;align-items:flex-start;justify-content:flex-start;border:1px solid var(--hor-border);background:rgba(255,255,255,.86);border-radius:15px;padding:20px 16px;cursor:pointer;text-align:left;color:var(--hor-text);font:inherit;line-height:1.4;transition:transform .18s ease,border-color .18s ease,background .18s ease}.hor-card:hover,.hor-card:focus{transform:translateY(-2px);border-color:rgba(96,104,92,.45);background:#fff;outline:none}.hor-card.is-active{border-color:rgba(90,76,52,.6);box-shadow:inset 0 0 0 1px rgba(90,76,52,.12)}.hor-orb{display:block;width:44px;height:44px;border-radius:50%;margin-bottom:14px;border:1px solid rgba(80,103,113,.28);background:radial-gradient(circle at 38% 34%,#fff,#d7e0e1 42%,#94a8ad 100%)}.hor-double{background:radial-gradient(circle at 32% 50%,#fff 0 10%,#a5b7bb 22%,transparent 38%),radial-gradient(circle at 68% 50%,#fff 0 10%,#bbaa8b 22%,transparent 38%),#eef2f2}.hor-silence .hor-orb{background:transparent}.hor-card strong{display:block;width:100%;font-size:1rem;line-height:1.35;margin-bottom:5px;white-space:normal;overflow-wrap:anywhere}.hor-card em{display:block;width:100%;font-style:normal;color:var(--hor-accent);font-size:.83rem;line-height:1.4;margin-bottom:9px;white-space:normal;overflow-wrap:anywhere}.hor-card small{display:block;width:100%;color:var(--hor-muted);line-height:1.45;white-space:normal;overflow-wrap:anywhere}.g-hall-resonance[data-mode="experience"] .hor-technical{display:none}.hor-footer{margin-top:30px;padding-top:18px;border-top:1px solid var(--hor-border);color:var(--hor-muted);font-size:.86rem}.hor-footer p{margin:0}@media(max-width:900px){.hor-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hor-grid-intervals{grid-template-columns:1fr}.hor-field{grid-template-columns:1fr}.hor-now{text-align:center}}@media(max-width:540px){.hor-shell{border-radius:14px;padding:18px 14px}.hor-grid{grid-template-columns:1fr}.hor-toolbar{align-items:flex-start}.hor-audio-controls{width:100%}.hor-volume-label{width:100%;justify-content:space-between}.hor-volume-label input{flex:1}.hor-mode,.hor-stop{min-height:44px}.hor-card{min-height:0}}@media(prefers-reduced-motion:reduce){.hor-visual.is-sounding .hor-ring{animation:none}.hor-card{transition:none}}

/* v1.2 stable: interval visualization and Explore-mode education */
.hor-interval-card{position:relative}
.hor-ratio-visual{position:relative;display:block;width:74px;height:54px;margin:0 0 15px;flex:0 0 auto}
.hor-ratio-visual i{position:absolute;display:block;border-radius:50%;border:1px solid rgba(77,99,108,.34);background:radial-gradient(circle at 35% 32%,#fff 0 10%,#d7e0e1 34%,#95a8ad 100%);box-shadow:0 4px 14px rgba(65,83,90,.08)}
.hor-ratio-octave i:first-child{width:54px;height:54px;left:0;top:0}
.hor-ratio-octave i:last-child{width:28px;height:28px;right:0;top:13px;border-color:rgba(138,116,79,.38);background:radial-gradient(circle at 35% 32%,#fff,#e5dbc9 40%,#b7a482 100%)}
.hor-ratio-third i:nth-child(1){width:50px;height:50px;left:0;top:2px}
.hor-ratio-third i:nth-child(2){width:27px;height:27px;left:33px;top:1px;border-color:rgba(138,116,79,.38);background:radial-gradient(circle at 35% 32%,#fff,#e5dbc9 40%,#b7a482 100%)}
.hor-ratio-third i:nth-child(3){width:20px;height:20px;left:48px;top:31px;border-color:rgba(112,125,102,.4);background:radial-gradient(circle at 35% 32%,#fff,#dce1d4 40%,#9daa91 100%)}
.hor-ratio-fifth i:first-child{width:48px;height:48px;left:0;top:3px}
.hor-ratio-fifth i:last-child{width:40px;height:40px;right:0;top:7px;border-color:rgba(138,116,79,.38);background:radial-gradient(circle at 35% 32%,#fff,#e5dbc9 40%,#b7a482 100%)}
.hor-explore-note{display:none;width:100%;margin-top:13px;padding-top:12px;border-top:1px solid var(--hor-border);font-size:.83rem;line-height:1.5;color:var(--hor-muted);white-space:normal;overflow-wrap:anywhere}
.hor-explore-note b{color:var(--hor-text);font-weight:600}
.g-hall-resonance[data-mode="explore"] .hor-explore-note{display:block}
.hor-interval-card.is-active .hor-ratio-visual i{box-shadow:0 0 0 4px rgba(118,130,132,.06),0 6px 18px rgba(65,83,90,.12)}
@media(prefers-reduced-motion:no-preference){.hor-interval-card.is-active .hor-ratio-visual i:first-child{animation:horRelationship 2.8s ease-in-out infinite}.hor-interval-card.is-active .hor-ratio-visual i:last-child{animation:horRelationship 2.8s ease-in-out .35s infinite}.hor-ratio-third i:nth-child(2){animation-delay:.25s!important}.hor-ratio-third i:nth-child(3){animation-delay:.5s!important}}
@keyframes horRelationship{0%,100%{transform:scale(.96);opacity:.72}50%{transform:scale(1.05);opacity:1}}