:root{--bg:#f8fafc;--surface:#ffffff;--surface2:#eef6ff;--text:#111827;--muted:#4b5563;--line:#dbe4ef;--primary:#0f766e;--primary2:#115e59;--accent:#f97316;--ok:#047857;--warn:#92400e;--danger:#b91c1c;--radius:18px;--shadow:0 16px 45px rgba(15,23,42,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;background:linear-gradient(180deg,#f8fafc 0,#fff 42%);color:var(--text);line-height:1.65}a{color:#0f766e;text-underline-offset:3px}a:hover{color:#115e59}.skip{position:absolute;left:-999px;top:8px;background:#fff;padding:10px 14px;border-radius:10px;z-index:10}.skip:focus{left:8px}.site-header{position:sticky;top:0;z-index:4;background:rgba(255,255,255,.92);backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid var(--line)}.nav{max-width:1120px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:14px 20px;gap:16px}.brand{display:flex;gap:10px;align-items:center;text-decoration:none;color:var(--text);font-weight:800;letter-spacing:-.02em}.brand img{width:34px;height:34px}.nav-links{display:flex;gap:14px;align-items:center;flex-wrap:wrap}.nav-links a{text-decoration:none;color:var(--muted);font-size:.95rem}.nav-links a[aria-current="page"]{color:var(--primary);font-weight:700}.wrap{max-width:1120px;margin:auto;padding:34px 20px}.hero{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(300px,.92fr);gap:28px;align-items:center;padding:30px 0}.eyebrow{display:inline-flex;gap:8px;align-items:center;padding:6px 10px;border:1px solid #bde9df;border-radius:999px;background:#ecfdf5;color:#065f46;font-weight:700;font-size:.82rem}.hero h1,.page-title{font-size:clamp(2rem,4.6vw,4rem);line-height:1.05;letter-spacing:-.05em;margin:16px 0 14px}.lead{font-size:1.13rem;color:var(--muted);max-width:760px}.hero-card,.tool-card,.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.hero-card{padding:24px}.hero-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.mini{padding:16px;border-radius:16px;border:1px solid var(--line);background:#fbfdff;text-decoration:none;color:var(--text)}.mini strong{display:block}.mini span{display:block;color:var(--muted);font-size:.9rem;margin-top:4px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.btn{border:0;border-radius:14px;padding:12px 16px;font-weight:800;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary2);color:#fff}.btn-secondary{background:#e7f5f2;color:#0f766e}.btn[disabled]{opacity:.55;cursor:not-allowed}.section{margin:38px 0}.section h2{font-size:1.6rem;line-height:1.2;margin:0 0 10px;letter-spacing:-.025em}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.card{padding:22px}.card h3{margin:.1rem 0 .45rem;font-size:1.08rem}.muted{color:var(--muted)}.small{font-size:.92rem}.breadcrumb{font-size:.92rem;color:var(--muted);margin-bottom:18px}.breadcrumb a{color:var(--muted)}.tool-card{padding:22px;margin-top:26px}.drop{border:2px dashed #b7c7d9;background:#f8fbff;border-radius:18px;padding:30px;text-align:center;transition:.15s}.drop.drag{background:#ecfdf5;border-color:#0f766e}.file-list{margin-top:14px;padding:14px;background:#f9fafb;border:1px solid var(--line);border-radius:14px;max-height:180px;overflow:auto}.controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:18px}.control{padding:14px;border:1px solid var(--line);border-radius:14px;background:#fff}.control input[type=range]{width:100%}.status{margin-top:14px;padding:12px 14px;border-radius:12px;background:#ecfdf5;color:#065f46;border:1px solid #bbf7d0}.error{background:#fef2f2;color:#991b1b;border-color:#fecaca}.note{padding:14px;border-radius:14px;border:1px solid #fed7aa;background:#fff7ed;color:#7c2d12}.trust{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}.trust div{background:#f8fafc;border:1px solid var(--line);border-radius:14px;padding:14px}.faq details{border-top:1px solid var(--line);padding:14px 0}.faq summary{font-weight:800;cursor:pointer}.site-footer{border-top:1px solid var(--line);margin-top:48px;background:#fff}.footer-inner{max-width:1120px;margin:auto;padding:24px 20px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;color:var(--muted);font-size:.92rem}.footer-inner nav{display:flex;gap:12px;flex-wrap:wrap}.callout{background:linear-gradient(135deg,#ecfdf5,#f0f9ff);border:1px solid #cdece4;border-radius:var(--radius);padding:20px}.schema-note{font-size:.85rem;color:var(--muted)}@media(max-width:820px){.hero{grid-template-columns:1fr}.grid-3,.grid-2,.controls,.trust{grid-template-columns:1fr}.nav{align-items:flex-start}.nav-links{justify-content:flex-end}.hero-card{padding:18px}.hero-grid{grid-template-columns:1fr}.wrap{padding:24px 16px}.nav-links a{font-size:.9rem}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.article{max-width:840px}.article-header{margin:22px 0 28px}.article-meta{display:flex;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:.92rem}.article-content h2{font-size:1.45rem;margin-top:30px;line-height:1.25}.article-content p{margin:14px 0}.article-content ol,.article-content ul{padding-left:1.35rem}.post-card{display:block;padding:18px;border:1px solid var(--line);border-radius:16px;background:#fff;text-decoration:none;color:var(--text)}.post-card:hover{box-shadow:var(--shadow);color:var(--text)}.post-card span{display:block;color:var(--muted);margin-top:6px}.related-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}@media(max-width:820px){.related-list{grid-template-columns:1fr}}

/* Professional polish pass: accessibility, tables, navigation, and layout density */
:focus-visible{outline:3px solid #f97316;outline-offset:3px}.brand span{display:flex;flex-direction:column;line-height:1.05}.brand small{font-size:.72rem;color:var(--muted);font-weight:700;letter-spacing:.02em}.nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:8px 10px;font-weight:800;color:var(--text)}.hero-pro{padding-top:42px}.hero-checks{padding-left:1.2rem;color:var(--muted)}.hero-checks li{margin:.35rem 0}.intro{font-size:1.05rem;color:var(--muted);max-width:920px}.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,.42fr);gap:18px;align-items:start}.page-hero{max-width:940px;margin:12px 0 30px}.check-list li{margin:.5rem 0}.inline-control{margin-top:14px}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--shadow)}table{width:100%;border-collapse:collapse;min-width:620px}caption{text-align:left;font-weight:800;padding:14px 16px;border-bottom:1px solid var(--line);background:#f8fafc}th,td{padding:14px 16px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}th{background:#f1f5f9;color:#0f172a}tr:last-child td{border-bottom:0}code{background:#f1f5f9;border:1px solid #e2e8f0;padding:.08rem .28rem;border-radius:6px}.score-card h2{margin-top:0}@media(max-width:820px){.nav{flex-wrap:wrap}.nav-toggle{display:inline-flex}.nav-links{display:none;width:100%;padding-top:10px;justify-content:flex-start}.nav-links.open{display:flex}.split{grid-template-columns:1fr}table{min-width:560px}.hero h1,.page-title{letter-spacing:-.035em}}


/* v4 real-world design pass: less repetitive page composition, tighter rhythm, and safer responsive layout */
body{font-size:17px;background:linear-gradient(180deg,#f7fafc 0,#ffffff 34%,#ffffff 100%)}
.wrap{max-width:1180px;padding:32px 22px 56px}.site-header{box-shadow:0 1px 0 rgba(15,23,42,.04)}
.nav{max-width:1180px}.brand strong{font-size:1.02rem}.brand small{font-size:.72rem;text-transform:none;color:#64748b}
.page-title,.hero h1{max-width:980px}.lead{font-size:1.08rem;line-height:1.72}.section{margin:48px 0}.section h2{font-size:clamp(1.45rem,2.6vw,2rem);margin-bottom:16px}.card{padding:26px}.card p:last-child,.note p:last-child{margin-bottom:0}.tool-card{padding:0;overflow:hidden}.tool-card h2{margin:0}.tool-shell{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,.42fr);gap:0;align-items:stretch}.tool-workspace{padding:28px}.tool-sidebar{padding:28px;border-left:1px solid var(--line);background:linear-gradient(180deg,#f8fafc,#fff)}.drop{padding:26px;min-height:170px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px}.drop p{margin:0}.file-list{width:100%;overflow-wrap:anywhere}.file-list li{margin:.35rem 0}.controls{grid-template-columns:repeat(2,minmax(220px,1fr))}.status{font-size:.96rem}.trust{grid-template-columns:repeat(3,minmax(0,1fr))}.trust div{min-height:98px}.split{grid-template-columns:minmax(0,1fr) minmax(300px,.36fr);gap:22px}.feature-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.feature-row .card{padding:20px}.process-steps{counter-reset:step;display:grid;gap:14px}.process-step{position:relative;padding:20px 20px 20px 64px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 10px 28px rgba(15,23,42,.05)}.process-step:before{counter-increment:step;content:counter(step);position:absolute;left:20px;top:20px;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:#0f766e;color:#fff;font-weight:900}.tool-bands{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}.quiet-panel{border:1px solid var(--line);border-radius:18px;background:#fbfdff;padding:22px}.warning-panel{border:1px solid #fed7aa;background:#fff7ed;border-radius:18px;padding:22px;color:#7c2d12}.scenario-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.scenario-list .mini{background:#fff}.page-hero{margin-bottom:36px}.blog-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.compact-list li{margin:.35rem 0}.wide-note{border-left:5px solid var(--primary);background:#f0fdfa;border-radius:14px;padding:18px 20px}.faq details{background:#fff;border:1px solid var(--line);border-radius:14px;margin:10px 0;padding:14px 16px}.faq details:first-of-type{border-top:1px solid var(--line)}
@media(max-width:900px){.tool-shell,.tool-bands,.split{grid-template-columns:1fr}.tool-sidebar{border-left:0;border-top:1px solid var(--line)}.feature-row,.scenario-list,.trust{grid-template-columns:1fr 1fr}.controls{grid-template-columns:1fr}}
@media(max-width:620px){body{font-size:16px}.wrap{padding:22px 15px 44px}.hero{gap:18px}.card,.tool-workspace,.tool-sidebar{padding:20px}.feature-row,.scenario-list,.trust,.grid-2,.grid-3{grid-template-columns:1fr}.drop{min-height:150px;padding:22px}.actions .btn{width:100%}table{min-width:640px}.table-wrap{margin-left:-2px;margin-right:-2px}.hero h1,.page-title{font-size:clamp(2rem,11vw,3rem)}}


/* Phase A: stronger content architecture and professional spacing */
.homepage-hero{grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr);padding-top:48px;padding-bottom:28px}
.task-card{border-left:5px solid var(--primary)}
.tool-choice-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.tool-choice,.guide-hub-card{display:block;text-decoration:none;color:var(--text);background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:0 12px 32px rgba(15,23,42,.055);min-height:100%}
.tool-choice:hover,.guide-hub-card:hover{color:var(--text);transform:translateY(-2px);box-shadow:var(--shadow)}
.tool-choice span{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:999px;background:#ecfdf5;color:#0f766e;font-weight:900;margin-bottom:12px}
.tool-choice h3,.guide-hub-card h3{margin:.1rem 0 .45rem;font-size:1.16rem}.tool-choice strong{display:block;margin-top:10px;color:#0f766e}.compact-list{padding-left:1.2rem}.compact-list li{margin:.48rem 0}.guide-hub-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.post-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.post-card h3{margin:.1rem 0 .35rem}.scenario-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 12px 32px rgba(15,23,42,.045)}.scenario-card h3{margin-top:0}.scenario-card a{font-weight:800}.tool-sidebar .small{margin-top:18px}.page-hero{padding:18px 0 4px}.page-hero .lead{max-width:940px}.tool-card + .section{margin-top:52px}.warning-panel h2,.quiet-panel h2{margin-top:0}.table-wrap{margin-top:14px}.process-step p{margin-bottom:0}.faq details p{max-width:850px}.btn-primary{box-shadow:0 10px 24px rgba(15,118,110,.22)}
@media(max-width:980px){.tool-choice-grid,.feature-row{grid-template-columns:repeat(2,minmax(0,1fr))}.scenario-list{grid-template-columns:1fr 1fr}.homepage-hero{grid-template-columns:1fr}.guide-hub-grid{grid-template-columns:1fr}.post-grid{grid-template-columns:1fr}}
@media(max-width:820px){.tool-shell{grid-template-columns:1fr}.tool-sidebar{border-left:0;border-top:1px solid var(--line)}.controls{grid-template-columns:1fr}.tool-choice-grid,.scenario-list{grid-template-columns:1fr}.wrap{padding-left:18px;padding-right:18px}.hero-card,.card,.quiet-panel,.warning-panel,.scenario-card,.tool-workspace,.tool-sidebar{padding:20px}.section{margin:40px 0}.drop{min-height:145px}}


/* Phase B: deep guide page polish */
.article-deep .article-content{font-size:1.02rem;line-height:1.72}.article-deep .content-block{margin:34px 0}.article-deep .content-block h2{margin-bottom:10px}.related-guides .guide-hub-grid{align-items:stretch}.article-meta{flex-wrap:wrap}.article-content ol,.article-content ul{padding-left:1.45rem}.article-content li{margin:.45rem 0}.article-content p{max-width:950px}.post-card{min-height:100%}


/* Phase B cleanup: fix tool controls overlap, guide hero alignment, and narrow aside typography */
.control{display:block;min-width:0}.inline-control{display:flex;align-items:flex-start;gap:10px;width:100%;max-width:760px;margin:16px 0 0}.inline-control input{margin-top:.45em;flex:0 0 auto}.tool-workspace>.btn{margin-top:16px}.tool-workspace{min-width:0;overflow:hidden}.tool-workspace .controls+.inline-control+.btn{display:inline-flex}.hero.page-hero{display:block;max-width:940px;padding:18px 0 28px}.hero.page-hero .eyebrow,.page-hero .eyebrow{margin-bottom:14px}.split>.quiet-panel h2,.split>.warning-panel h2{font-size:clamp(1.25rem,2vw,1.75rem);line-height:1.15;letter-spacing:-.025em}.split>.quiet-panel,.split>.warning-panel{min-width:0}.grid-2,.split,.tool-shell{min-width:0}.page-hero .lead{max-width:920px}@media(max-width:760px){.controls{grid-template-columns:1fr}.inline-control{max-width:100%}.tool-workspace>.btn{width:100%;}.hero.page-hero{padding-top:8px}.split{grid-template-columns:1fr!important}}

/* Phase C keyword guide pages */
.article-header .article-meta span{background:#f8fafc;border:1px solid var(--line);border-radius:999px;padding:4px 10px}.article-deep .page-title{max-width:900px}.article-deep .lead{max-width:860px}.guide-hub-card p,.post-card span{line-height:1.55}.content-block .btn{margin-top:8px}.content-block code{font-size:.95em}


/* Phase D design cleanup: split sections must not leave a blank content column. */
.section.split > h2:first-child {
  grid-column: 1 / -1;
  margin-bottom: 0;
}
.section.split > .card,
.section.split > .quiet-panel,
.section.split > .warning-panel {
  align-self: stretch;
}
.section.split > .card p:first-child,
.section.split > .quiet-panel p:first-child,
.section.split > .warning-panel p:first-child { margin-top: 0; }
.section.split > aside.card,
.section.split > aside.quiet-panel,
.section.split > aside.warning-panel { max-width: 100%; }
.keyword-guide-links{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:18px}.keyword-guide-links a{display:block;text-decoration:none;color:var(--text);border:1px solid var(--line);background:#fff;border-radius:18px;padding:18px;box-shadow:0 10px 26px rgba(15,23,42,.045)}.keyword-guide-links strong{display:block;color:#0f766e;margin-bottom:5px}.keyword-guide-links span{display:block;color:var(--muted);font-size:.94rem;line-height:1.5}.guide-callout{border:1px solid #bde9df;background:#ecfdf5;border-radius:18px;padding:20px;margin-top:18px}.guide-callout p:last-child{margin-bottom:0}.page-hero .actions{margin-top:18px}.article-content .callout{margin:22px 0}.article-content .btn{white-space:normal}@media(max-width:980px){.keyword-guide-links{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:620px){.keyword-guide-links{grid-template-columns:1fr}.section.split{gap:14px}.section.split > h2:first-child{font-size:clamp(1.55rem,8vw,2.15rem)}}

/* Phase E support links and accessibility content polish */
.phase-e-links { margin-top: clamp(28px, 5vw, 64px); }
.phase-e-links .guide-card span { display:block; margin-top:8px; color: var(--muted); font-weight:500; line-height:1.55; }
.article-content .guide-grid { align-items: stretch; }
.article-content .guide-card { min-height: 150px; }
@media (max-width: 760px) {
  .phase-e-links .guide-grid, .article-content .guide-grid { grid-template-columns: 1fr; }
}


/* Final production design patch: reusable guide/link cards and responsive editorial grids. */
.guide-grid,
.link-grid,
.related-grid,
.support-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  align-items: stretch;
  margin-top: 18px;
}
.guide-card,
.link-card,
.related-card,
.support-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 156px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(180deg, #ffffff 0%, #fbfdff 100%);
  color: var(--text);
  text-decoration: none;
  box-shadow: 0 14px 32px rgba(15,23,42,.055);
}
.guide-card:hover,
.link-card:hover,
.related-card:hover,
.support-card:hover,
.guide-card:focus-visible,
.link-card:focus-visible,
.related-card:focus-visible,
.support-card:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  color: var(--text);
}
.guide-card strong,
.link-card strong,
.related-card strong,
.support-card strong {
  display: block;
  color: var(--primary2);
  font-size: 1.05rem;
  line-height: 1.3;
  text-decoration: none;
}
.guide-card span,
.link-card span,
.related-card span,
.support-card span {
  display: block;
  color: var(--muted);
  font-weight: 500;
  line-height: 1.55;
  text-decoration: none;
}
.phase-e-links .guide-grid,
.related-guides .guide-grid,
.article-content .guide-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.phase-e-links .guide-card,
.related-guides .guide-card,
.article-content .guide-card {
  min-height: 150px;
}
.related-guides,
.phase-e-links {
  clear: both;
}
.related-guides h2,
.phase-e-links h2 {
  max-width: 940px;
}
/* Prevent split sections from leaving a blank first column when an H2 appears before cards. */
.section.split > h2:first-child,
.split > h2:first-child {
  grid-column: 1 / -1;
}
/* Keep tool controls from colliding on medium screens. */
.tool-workspace .controls + .inline-control,
.tool-workspace .inline-control + .btn,
.tool-workspace .inline-control + .actions,
.tool-workspace .control + .btn {
  margin-top: 16px;
}
.tool-workspace > .btn,
.tool-workspace > .actions {
  clear: both;
}
.inline-control { position: relative; z-index: 1; }
@media (max-width: 980px) {
  .guide-grid,
  .link-grid,
  .related-grid,
  .support-grid,
  .phase-e-links .guide-grid,
  .related-guides .guide-grid,
  .article-content .guide-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 700px) {
  .guide-grid,
  .link-grid,
  .related-grid,
  .support-grid,
  .phase-e-links .guide-grid,
  .related-guides .guide-grid,
  .article-content .guide-grid,
  .guide-hub-grid,
  .keyword-guide-links {
    grid-template-columns: 1fr;
  }
  .guide-card,
  .link-card,
  .related-card,
  .support-card {
    min-height: 0;
  }
}