:root{
  --cream:#f5f9ff;
  --paper:rgba(252,254,255,.93);
  --ink:#23314a;
  --ink-soft:rgba(35,49,74,.74);
  --muted:#718097;
  --line:rgba(54,87,122,.17);
  --sky-1:#eaf6ff;
  --sky-2:#cfe9fb;
  --blue:#4578c8;
  --blue-strong:#2f5fa8;
  --blue-deep:#173c72;
  --mint:#7fc6c5;
  --mint-soft:#def3ef;
  --peach:#e9bd68;
  --peach-soft:#fff1df;
  --gold:#d9a62b;
  --gold-soft:#fff3d8;
  --japan:#ef8c75;
  --coral:var(--japan);
  --danger:#9a3d38;
  --ok:#14715e;
  --shadow:0 22px 58px rgba(39,70,110,.14);
  --shadow-soft:0 10px 28px rgba(39,70,110,.09);
  --radius:26px;
  --radius-sm:17px;
  --max:1180px;
  font-family:"Segoe UI","Noto Sans JP","Yu Gothic UI",Meiryo,system-ui,-apple-system,sans-serif;
  color:var(--ink);
  background:var(--cream);
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;min-height:100vh;background:linear-gradient(180deg,#f7fbff 0%,#eef9f6 42%,#fff8ed 100%);color:var(--ink)}
button,select{font:inherit}
button{cursor:pointer}
button:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid #f5b94f;outline-offset:3px}
button:disabled{cursor:not-allowed;opacity:.55}
a{color:inherit}
[hidden]{display:none!important}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:fixed;z-index:1000;left:12px;top:10px;padding:10px 14px;background:var(--ink);color:#fff;border-radius:10px;transform:translateY(-150%);transition:.2s}
.skip-link:focus{transform:none}
.background-art{position:fixed;inset:0;z-index:-1;pointer-events:none;overflow:hidden}
.background-art::before,.background-art::after{content:"";position:absolute;border-radius:50%;filter:blur(3px)}
.background-art{background-image:linear-gradient(115deg,rgba(127,198,197,.08) 0 1px,transparent 1px 82px),linear-gradient(25deg,rgba(217,166,43,.07) 0 1px,transparent 1px 96px)}
.background-art::before{width:520px;height:520px;right:-180px;top:70px;background:radial-gradient(circle,rgba(127,198,197,.2),transparent 68%)}
.background-art::after{width:580px;height:580px;left:-280px;bottom:-160px;background:radial-gradient(circle,rgba(233,189,104,.18),transparent 68%)}

.site-header{position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px max(22px,calc((100vw - var(--max))/2));background:rgba(252,254,255,.82);backdrop-filter:blur(18px);border-bottom:1px solid rgba(127,198,197,.2)}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;min-width:230px}
.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:15px;background:linear-gradient(145deg,var(--mint-soft),var(--gold-soft));border:1px solid rgba(217,166,43,.22);font-weight:850;color:var(--ink);box-shadow:var(--shadow-soft)}
.brand-logotype{position:relative;overflow:hidden;background:linear-gradient(145deg,#f8fffb 0%,var(--mint-soft) 52%,var(--gold-soft) 100%)}
.brand-kotoba{position:absolute;inset:3px 5px 0 3px;background-image:url("souls/kotoba-v2/kotoba-chan-idle-breath-think-relax-4x4.png");background-repeat:no-repeat;background-size:400% 400%;background-position:0 0;filter:drop-shadow(0 5px 7px rgba(35,49,74,.18))}
.brand-glyph{position:absolute;right:3px;bottom:2px;display:grid;place-items:center;width:17px;height:17px;border-radius:7px;background:rgba(255,255,255,.86);border:1px solid rgba(217,166,43,.3);font-size:.68rem;line-height:1;color:var(--blue-deep)}
.brand strong{display:block;font-size:1.03rem;letter-spacing:.015em}
.brand small{display:block;color:var(--muted);font-size:.73rem;margin-top:2px}
.header-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.compact-select select,.header-button{min-height:42px;border:1px solid var(--line);background:rgba(255,255,255,.8);border-radius:999px;color:var(--ink);padding:0 15px;font-weight:700}
.header-button:hover,.compact-select select:hover{border-color:rgba(127,198,197,.48);background:#fff}
.urgent-button{background:var(--gold-soft);border-color:rgba(217,166,43,.32)}

.app{width:min(var(--max),calc(100% - 38px));margin:34px auto 90px}
.hero{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(280px,.7fr);gap:24px;align-items:stretch}
.hero-copy,.kotoba-guide{border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.hero-copy{padding:clamp(30px,5vw,66px);background:linear-gradient(135deg,rgba(255,255,255,.97),rgba(235,248,245,.94) 58%,rgba(255,243,216,.86));position:relative;overflow:hidden}
.hero-copy::after{content:"";position:absolute;width:240px;height:240px;right:-65px;bottom:-105px;border-radius:50%;background:linear-gradient(145deg,rgba(127,198,197,.23),rgba(233,189,104,.16))}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.74rem;font-weight:850;color:#a97810;margin:0 0 15px}
.hero h1{max-width:760px;font-size:clamp(2.1rem,5vw,4.5rem);line-height:1.01;letter-spacing:-.045em;margin:0}
.hero-lead{font-size:clamp(1rem,1.7vw,1.25rem);line-height:1.62;color:var(--ink-soft);max-width:730px;margin:24px 0 0}
.kotoba-guide{background:linear-gradient(160deg,rgba(255,255,255,.92),rgba(255,243,216,.72));padding:18px;display:flex;flex-direction:column;justify-content:flex-end;min-height:300px}
.kotoba-art{height:200px;position:relative;display:grid;place-items:center;overflow:hidden;border-radius:20px}
.kotoba-art>img{position:absolute;width:100%;height:100%;object-fit:cover;opacity:.65}
.sprite{position:relative;width:180px;height:180px;z-index:2}
.sprite-scale-layer,.sprite-motion,.sprite-film{display:block;position:absolute;inset:0}
.sprite-film{background-repeat:no-repeat}
.kotoba-guide p{position:relative;margin:12px 4px 3px;padding:14px 16px;background:rgba(255,255,255,.88);border:1px solid rgba(217,166,43,.23);border-radius:15px;line-height:1.45;font-weight:700}

.safety-notice{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:22px 0 0;padding:20px 24px;border-radius:20px;border:1px solid rgba(169,65,55,.23);background:linear-gradient(110deg,#fff7f3,#fff1e5);box-shadow:var(--shadow-soft)}
.safety-notice strong{font-size:1.07rem}
.safety-notice p{margin:5px 0 0;color:var(--ink-soft)}
.safety-notice button{border:0;border-radius:999px;background:var(--danger);color:#fff;padding:12px 17px;font-weight:800;white-space:nowrap}

.router-section,.route-view{margin-top:36px}
.section-heading{display:flex;align-items:flex-start;gap:17px;margin:0 0 20px}
.section-heading.compact{margin-top:34px}
.section-number{flex:0 0 auto;display:grid;place-items:center;min-width:50px;height:34px;border-radius:999px;background:linear-gradient(145deg,var(--mint),var(--peach));color:var(--ink);font-size:.75rem;font-weight:900;letter-spacing:.08em}
.section-heading h2{font-size:clamp(1.45rem,3vw,2.15rem);letter-spacing:-.025em;margin:0}
.section-heading p{margin:6px 0 0;color:var(--muted);line-height:1.45}
.route-groups{display:grid;gap:23px}
.route-group{padding:22px;background:rgba(255,255,255,.67);border:1px solid var(--line);border-radius:var(--radius)}
.route-group-header{display:flex;align-items:center;gap:12px;margin:0 0 14px}
.route-group-header span{display:grid;place-items:center;width:32px;height:32px;border-radius:11px;background:var(--mint-soft);font-weight:900}
.route-group-header h3{margin:0;font-size:1.06rem}
.route-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.route-card{position:relative;min-height:126px;padding:18px;text-align:left;border:1px solid var(--line);border-radius:18px;background:#fff;color:var(--ink);box-shadow:0 5px 15px rgba(39,70,110,.04);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.route-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-soft);border-color:rgba(127,198,197,.48)}
.route-card .route-icon{display:block;font-size:1.25rem;margin-bottom:14px}
.route-card strong{display:block;font-size:.98rem;line-height:1.32}
.route-card small{display:block;margin-top:7px;color:var(--muted);line-height:1.35}
.route-card.safety-route::after{content:"";position:absolute;right:13px;top:13px;width:9px;height:9px;border-radius:50%;background:var(--coral);box-shadow:0 0 0 4px rgba(233,133,115,.14)}

.back-button{border:0;background:transparent;color:var(--blue-strong);font-weight:800;padding:10px 0;margin-bottom:12px}
.route-header{display:flex;justify-content:space-between;gap:25px;align-items:flex-end;padding:28px 30px;background:rgba(255,255,255,.82);border:1px solid var(--line);border-radius:var(--radius)}
.route-header h2{font-size:clamp(2rem,5vw,4rem);line-height:1.02;letter-spacing:-.045em;margin:0}
.route-header p:not(.eyebrow){max-width:720px;color:var(--ink-soft);font-size:1.05rem;line-height:1.55;margin:16px 0 0}
.quiet-action{border:1px solid var(--line);background:#fff;border-radius:999px;padding:11px 16px;font-weight:750;white-space:nowrap}

.first-sentence{margin-top:18px;display:grid;grid-template-columns:minmax(0,1fr) 260px;border-radius:var(--radius);overflow:hidden;background:linear-gradient(135deg,#fff8e9 0%,#e7f8f5 100%);border:1px solid rgba(127,198,197,.32);box-shadow:var(--shadow)}
.first-sentence-copy{padding:clamp(25px,5vw,52px)}
.purpose-label{display:inline-block;padding:7px 11px;border-radius:999px;background:rgba(255,255,255,.72);color:#8a6208;font-size:.77rem;font-weight:900;text-transform:uppercase;letter-spacing:.07em}
.first-sentence h3{margin:16px 0 0;font-size:1rem;color:#8a6208}
.first-sentence blockquote{margin:14px 0 0;font-size:clamp(1.55rem,3.9vw,3.25rem);line-height:1.16;letter-spacing:-.025em;font-weight:850;max-width:850px}
.meaning{margin:18px 0 0;font-size:1.05rem;line-height:1.5;color:var(--ink-soft)}
.why{margin:10px 0 0;font-size:.93rem;line-height:1.45;color:var(--muted)}
.phrase-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
.primary-action,.secondary-action,.danger-action{min-height:47px;border-radius:999px;padding:0 19px;font-weight:850}
.primary-action{border:0;background:linear-gradient(145deg,var(--mint),#9bdad4);color:var(--ink);box-shadow:0 9px 18px rgba(20,113,94,.16)}
.secondary-action{border:1px solid rgba(127,198,197,.45);background:rgba(255,255,255,.78);color:var(--ink)}
.danger-action{border:1px solid rgba(154,61,56,.32);background:#fff7f5;color:var(--danger)}
.first-sentence.choice-mode blockquote{font-size:clamp(1.8rem,5vw,3.5rem)}
.first-sentence-note{padding:28px 23px;background:linear-gradient(180deg,rgba(255,255,255,.68),rgba(255,255,255,.4));border-left:1px solid rgba(69,120,200,.15);display:flex;flex-direction:column;justify-content:center}
.first-sentence-note strong{font-size:1.05rem}
.first-sentence-note p{color:var(--ink-soft);line-height:1.5;margin:8px 0 0}

#ladderCards{display:grid;gap:12px}
.ladder-card{border:1px solid var(--line);border-radius:20px;background:#fff;overflow:hidden}
.ladder-card>summary{list-style:none;display:grid;grid-template-columns:42px 1fr auto;align-items:center;gap:13px;padding:19px 20px;cursor:pointer}
.ladder-card>summary::-webkit-details-marker{display:none}
.ladder-step{display:grid;place-items:center;width:38px;height:38px;border-radius:13px;background:var(--sky-1);color:var(--blue-deep);font-weight:900}
.ladder-card>summary strong{font-size:1rem}
.ladder-card>summary small{display:block;color:var(--muted);margin-top:3px}
.ladder-card>summary::after{content:"+";font-size:1.35rem;color:var(--blue-strong)}
.ladder-card[open]>summary::after{content:"−"}
.ladder-content{padding:0 20px 22px 75px}
.ladder-content blockquote{font-size:clamp(1.18rem,2.5vw,1.65rem);line-height:1.35;margin:0;font-weight:760}
.ladder-content .meaning{font-size:.98rem}
.ladder-content .phrase-actions{margin-top:17px}
.formal-toggle{margin-top:15px}
.formal-toggle summary{display:block;padding:0;color:var(--blue-strong);font-weight:800;cursor:pointer}
.formal-box{margin-top:11px;padding:14px;border-radius:14px;background:var(--gold-soft);line-height:1.45}

.context-tool-buttons{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.context-tool-button{min-height:98px;padding:18px;border:1px solid var(--line);border-radius:18px;background:linear-gradient(145deg,#fff,#f5fbf8);text-align:left}
.context-tool-button strong{display:block;font-size:1rem}
.context-tool-button span{display:block;color:var(--muted);margin-top:6px;font-size:.9rem;line-height:1.4}

.footer{width:min(var(--max),calc(100% - 38px));margin:0 auto 34px;padding:20px 4px;display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);color:var(--muted);font-size:.86rem}
.footer strong,.footer span{display:block}
.footer .studio-return{align-self:center;color:var(--muted);font-weight:800;text-decoration:none;opacity:.68;white-space:nowrap}
.footer .studio-return:hover,.footer .studio-return:focus-visible{opacity:1;color:var(--ink);text-decoration:underline;text-underline-offset:4px}
.footer button{border:0;background:transparent;color:var(--blue-strong);font-weight:800}

dialog{border:0;padding:0;background:transparent}
dialog::backdrop{background:rgba(20,38,67,.44);backdrop-filter:blur(7px)}
.sheet-dialog{width:min(980px,calc(100% - 24px));max-height:min(90vh,900px)}
.dialog-frame{background:var(--paper);border-radius:28px;border:1px solid rgba(255,255,255,.78);box-shadow:0 35px 90px rgba(18,39,72,.3);overflow:auto;max-height:90vh}
.compact-dialog{max-width:700px;margin:auto}
.dialog-header{position:sticky;top:0;z-index:4;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:23px 25px;background:rgba(252,254,255,.95);backdrop-filter:blur(15px);border-bottom:1px solid var(--line)}
.dialog-header h2{margin:0;font-size:1.7rem;letter-spacing:-.025em}
.dialog-header .eyebrow{margin:0 0 4px}
.close-button{width:43px;height:43px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--ink);font-size:1.5rem}
.dialog-intro{margin:22px 25px 0;color:var(--ink-soft);line-height:1.5}
.tool-menu{display:grid;grid-template-columns:repeat(2,1fr);gap:13px;padding:24px}
.tool-card{padding:21px;border:1px solid var(--line);border-radius:19px;background:#fff;text-align:left;min-height:125px}
.tool-card:hover{border-color:rgba(69,120,200,.36);box-shadow:var(--shadow-soft)}
.tool-card strong{font-size:1.08rem;display:block}
.tool-card span{display:block;color:var(--muted);line-height:1.45;margin-top:8px}
.tool-workspace{padding:24px}
.workspace-back{border:0;background:transparent;color:var(--blue-strong);font-weight:850;padding:5px 0 20px}
.tool-hero{padding:23px;border-radius:20px;background:linear-gradient(135deg,var(--mint-soft),#fff,var(--peach-soft));border:1px solid var(--line)}
.tool-hero h3{font-size:1.75rem;margin:0}
.tool-hero p{color:var(--ink-soft);line-height:1.55;margin:9px 0 0}
.tool-controls{display:flex;gap:9px;flex-wrap:wrap;margin:18px 0}
.tool-controls button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:10px 14px;font-weight:800}
.checklist-groups{display:grid;gap:18px}
.optional-papers{margin-top:18px;padding:17px;border-radius:18px;background:rgba(255,255,255,.62);border:1px dashed rgba(69,120,200,.24)}
.optional-papers h4{margin:0}
.checklist-group{padding:19px;border-radius:19px;border:1px solid var(--line);background:#fff}
.checklist-group h4{margin:0 0 13px}
.check-item{display:grid;grid-template-columns:26px 1fr;gap:11px;padding:13px 0;border-top:1px solid rgba(54,87,122,.1)}
.check-item:first-of-type{border-top:0}
.check-item input{width:20px;height:20px;margin-top:2px;accent-color:var(--blue)}
.check-item strong{display:block}
.check-item small{display:block;color:var(--muted);line-height:1.4;margin-top:3px}
.conditional-choices{display:flex;gap:8px;flex-wrap:wrap;margin:15px 0}
.choice-chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 12px;font-weight:750}
.choice-chip[aria-pressed="true"]{background:var(--mint);color:var(--ink);border-color:rgba(20,113,94,.24)}
.safeguard-options{display:grid;gap:11px;margin-top:18px}
.safeguard-button{padding:17px;border:1px solid var(--line);border-radius:16px;background:#fff;text-align:left}
.safeguard-button[aria-pressed="true"]{border-color:var(--mint);background:var(--mint-soft)}
.result-card{margin-top:18px;padding:20px;border-radius:18px;background:linear-gradient(135deg,var(--mint-soft),#fff);border:1px solid rgba(127,198,197,.32)}
.result-card blockquote{font-size:1.25rem;line-height:1.45;font-weight:750;margin:0}
.result-card p{color:var(--ink-soft);line-height:1.5}
.result-card .legal-note{font-size:.88rem;padding:12px;border-radius:12px;background:rgba(255,255,255,.75)}
.info-list{display:grid;gap:12px;margin-top:18px}
.info-card{padding:18px;border-radius:17px;background:#fff;border:1px solid var(--line)}
.info-card h4{margin:0 0 7px}
.info-card p{margin:0;color:var(--ink-soft);line-height:1.5}
.info-card blockquote{margin:13px 0 0;padding:13px;border-left:4px solid var(--mint);background:var(--mint-soft);font-weight:730;line-height:1.45}
.source-list{display:grid;gap:12px;margin-top:18px}
.source-card{padding:18px;border:1px solid var(--line);border-radius:17px;background:#fff}
.source-card h4{margin:0}
.source-card p{color:var(--ink-soft);line-height:1.45}
.source-card a{display:inline-block;color:var(--blue-strong);font-weight:850}
.source-meta{font-size:.79rem;color:var(--muted)}
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin-top:18px}
.compare-column{padding:19px;border:1px solid var(--line);border-radius:18px;background:#fff}
.compare-column h4{margin:0 0 12px}
.compare-row{padding:11px 0;border-top:1px solid rgba(54,87,122,.11)}
.compare-row:first-of-type{border-top:0}
.compare-row strong{display:block;font-size:.83rem;color:var(--blue-deep)}
.compare-row span{display:block;margin-top:4px;line-height:1.45;color:var(--ink-soft)}

.urgent-list{display:grid;gap:10px;padding:22px 25px 28px}
.urgent-item{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:16px;border:1px solid var(--line);border-radius:16px;background:#fff}
.urgent-item strong{display:block}
.urgent-item small{display:block;color:var(--muted);margin-top:3px}
.urgent-item a{font-size:1.08rem;font-weight:900;color:var(--blue-deep);text-decoration:none}
.about-copy{padding:23px 25px 29px;line-height:1.6}
.about-copy h3{font-size:1.4rem}
.about-copy dl{display:grid;gap:10px;margin:22px 0}
.about-copy dl div{padding:13px 15px;border-radius:14px;background:var(--sky-1)}
.about-copy dt{font-weight:850}
.about-copy dd{margin:3px 0 0;color:var(--ink-soft)}
.danger-quiet{border:1px solid rgba(154,61,56,.25);background:#fff7f5;color:var(--danger);border-radius:999px;padding:11px 15px;font-weight:850}
.disclaimer{font-size:.88rem;color:var(--muted)}

.show-dialog{width:100vw;height:100vh;max-width:none;max-height:none;margin:0}
.show-dialog::backdrop{background:#fff}
.show-frame{position:fixed;inset:0;display:grid;place-content:center;text-align:center;padding:clamp(30px,8vw,100px);background:#fff}
.show-close{position:absolute;right:22px;top:22px;width:48px;height:48px;border:1px solid var(--line);background:#fff;border-radius:50%;font-size:1.6rem}
.show-frame blockquote{max-width:1200px;margin:0;font-size:clamp(2.2rem,7vw,6.4rem);line-height:1.12;letter-spacing:-.035em;font-weight:880}
.show-frame p{font-size:clamp(1rem,2vw,1.5rem);color:var(--muted);margin:26px auto 0;max-width:900px}

.toast{position:fixed;z-index:200;left:50%;bottom:28px;transform:translate(-50%,20px);padding:11px 16px;border-radius:999px;background:var(--ink);color:#fff;font-weight:800;opacity:0;pointer-events:none;transition:.2s}
.toast.visible{opacity:1;transform:translate(-50%,0)}

@media (max-width:980px){
  .site-header{align-items:flex-start}
  .brand small{display:none}
  .route-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .hero{grid-template-columns:1fr}
  .kotoba-guide{min-height:220px;display:grid;grid-template-columns:220px 1fr;align-items:center}
  .kotoba-art{height:190px}
  .context-tool-buttons{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .site-header{position:relative;padding:9px 12px;display:block}
  .brand{margin-bottom:8px;min-width:0}
  .brand-mark{width:34px;height:34px;border-radius:12px}
  .brand strong{font-size:.94rem}
  .header-actions{justify-content:flex-start}
  .compact-select{flex:1}
  .compact-select select{width:100%}
  .compact-select select,.header-button{min-height:36px;padding:0 10px;font-size:.82rem}
  .header-button{flex:1}
  .app{width:min(100% - 20px,var(--max));margin-top:10px}
  .hero{grid-template-columns:minmax(0,1fr) 104px;gap:10px;align-items:stretch}
  .hero-copy{padding:16px 15px;border-radius:22px}
  .hero-copy::after{width:130px;height:130px;right:-55px;bottom:-70px}
  .eyebrow{font-size:.62rem;margin-bottom:8px;letter-spacing:.08em}
  .hero h1{font-size:1.72rem;line-height:1.05;letter-spacing:-.035em}
  .hero-lead{font-size:.9rem;line-height:1.4;margin-top:9px}
  .kotoba-guide{display:block;padding:8px;min-height:0;border-radius:22px}
  .kotoba-art{height:84px;border-radius:16px}
  .sprite{width:78px;height:78px}
  .kotoba-guide p{display:none}
  .router-section{margin-top:14px}
  .section-heading{gap:10px;margin-bottom:12px}
  .section-number{min-width:39px;height:28px;font-size:.68rem}
  .section-heading h2{font-size:1.2rem}
  .section-heading p{font-size:.87rem;margin-top:3px}
  .route-groups{gap:13px}
  .route-group{padding:10px;border-radius:22px}
  .route-group>summary{padding:13px 14px}
  .route-group-header{margin-bottom:8px}
  .route-grid{grid-template-columns:1fr}
  .route-card{min-height:auto;padding:13px 14px;border-radius:16px}
  .route-card .route-icon{margin-bottom:7px}
  .route-card small{margin-top:4px}
  .route-header{display:block;padding:23px 20px}
  .route-header .quiet-action{margin-top:18px}
  .first-sentence{grid-template-columns:1fr}
  .first-sentence-note{border-left:0;border-top:1px solid rgba(69,120,200,.15);padding:18px 21px}
  .first-sentence-copy{padding:26px 20px}
  .ladder-card summary{grid-template-columns:39px 1fr auto;padding:16px 14px}
  .ladder-content{padding:0 15px 19px 15px}
  .context-tool-buttons{grid-template-columns:1fr}
  .footer{display:block}
  .footer .studio-return,.footer button{display:inline-block;margin-top:15px;padding:0}
  .footer button{margin-left:18px}
  .tool-menu{grid-template-columns:1fr;padding:15px}
  .tool-workspace{padding:15px}
  .compare-grid{grid-template-columns:1fr}
  .safety-notice{display:block}
  .safety-notice button{margin-top:15px}
}
@media (max-width:430px){
  .header-actions{display:grid;grid-template-columns:1fr 1fr}
  .header-button{padding:0 8px;font-size:.84rem}
  .route-header h2{font-size:2.15rem}
  .first-sentence blockquote{font-size:1.65rem}
  .phrase-actions button{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}
@media print{
  .site-header,.hero,.router-section,.back-button,.route-header .quiet-action,.phrase-actions,.context-tools,.footer,.toast,.safety-notice{display:none!important}
  body{background:#fff}
  .app{width:100%;margin:0}
  .route-view{display:block!important;margin:0}
  .route-header,.first-sentence,.ladder-card{box-shadow:none;border:1px solid #aaa}
  .ladder-card{break-inside:avoid}
  .ladder-card:not([open]) .ladder-content{display:block}
}

/* 3.1 interaction and hierarchy refinements */
.route-group{padding:0;overflow:hidden}
.route-group>summary{list-style:none;cursor:pointer;padding:18px 20px;margin:0;display:grid;grid-template-columns:32px 1fr auto 24px;align-items:center;gap:12px}
.route-group>summary::-webkit-details-marker{display:none}
.route-group>summary::after{content:"+";font-size:1.2rem;color:var(--blue-strong);margin-left:4px}
.route-group[open]>summary::after{content:"−"}
.route-group>summary small{display:grid;place-items:center;min-width:28px;height:28px;border-radius:999px;background:var(--sky-1);color:var(--blue-deep);font-weight:900;font-size:.76rem}
.route-group .route-grid{padding:0 20px 20px}
.route-group-immediate>summary span{background:var(--mint-soft)}
.route-group-starting>summary span{background:var(--sky-2)}
.route-group-process>summary span{background:#dce8fb}

.ladder-card{position:relative}
.ladder-stage-2{background:linear-gradient(135deg,#f8fcff,#edf7ff);border-color:rgba(79,136,201,.22)}
.ladder-stage-2 .ladder-step{background:#dff1ff;color:#24568f}
.ladder-stage-3{background:linear-gradient(135deg,#f7fbff,#e2effc);border-color:rgba(47,95,168,.25)}
.ladder-stage-3 .ladder-step{background:#c9e0f8;color:#1f4c83}
.ladder-stage-4{background:linear-gradient(135deg,#f4f8fd,#d9e7f7);border-color:rgba(23,60,114,.28)}
.ladder-stage-4 .ladder-step{background:var(--blue-deep);color:#fff}
.ladder-card[open]{box-shadow:var(--shadow-soft)}
.compact-actions{margin-top:14px}
.compact-actions button{min-width:110px}

.tool-card-icon{display:grid!important;place-items:center;width:38px;height:38px;margin:0 0 13px!important;border-radius:13px;background:linear-gradient(145deg,var(--mint-soft),var(--gold-soft));color:var(--ink);font-size:1.05rem;font-weight:900}
.tool-menu-clear{grid-column:1/-1;min-height:46px;border:1px solid rgba(154,61,56,.22);background:#fff8f6;color:var(--danger);border-radius:999px;font-weight:850}

@media (min-width:721px){
  .route-group>summary{cursor:default}
  .route-group>summary::after{display:none}
}
@media (max-width:720px){
  .route-groups{gap:13px}
  .route-group>summary{padding:15px 14px}
  .route-group .route-grid{padding:0 9px 10px}
  .route-group:not([open]){background:rgba(255,255,255,.78)}
}

@keyframes sheet-rise{from{opacity:0;transform:translateY(24px) scale(.985)}to{opacity:1;transform:none}}
.sheet-dialog[open] .dialog-frame{animation:sheet-rise .24s ease-out}
@media (max-width:720px){
  .sheet-dialog{width:100%;max-width:none;max-height:96dvh;margin:auto 0 0 0}
  .sheet-dialog .dialog-frame{max-height:96dvh;border-radius:26px 26px 0 0;border-bottom:0}
  .sheet-dialog .dialog-header{padding:19px 17px}
}