.gs-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:0;min-height:calc(100vh - 64px);max-width:1180px;margin:0 auto}.gs-side{padding:48px 16px;position:sticky;top:64px;align-self:start}.gs-side__heading{font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--text-secondary);padding:0 12px 12px}.gs-side a{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:6px;color:var(--text-secondary);font-size:14px;text-decoration:none}.gs-side a:hover{background:#0000000a;color:var(--text-primary);text-decoration:none}.gs-side a.active{background:#212bfa14;color:var(--klang-blue);font-weight:500}.gs-side .step-num{flex-shrink:0;width:22px;height:22px;border:1px solid currentColor;opacity:.4;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:11px;font-weight:600}.gs-side a.active .step-num,.gs-side a.done .step-num{background:var(--klang-blue);color:#fff;border-color:var(--klang-blue);opacity:1}.gs-side a.done .step-num:after{content:"✓"}.gs-side a.done .step-num span{display:none}.gs-main{max-width:760px;min-width:0}.gs-hero{padding-bottom:48px;border-bottom:1px solid var(--border-subtle);margin-bottom:8px}.step{padding-top:32px;padding-bottom:32px;border-bottom:1px solid var(--border-subtle);scroll-margin-top:56px}.step:last-of-type{border:0}.step__num{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;background:var(--klang-blue);color:#fff;border-radius:50%;font-size:14px;font-weight:600;margin-bottom:16px}.step h2{font-weight:400;font-size:32px;line-height:1.15;letter-spacing:-.01em;margin:0 0 12px}.step p{font-size:15px;line-height:1.6;color:var(--text-primary);max-width:64ch;margin:0 0 12px}.step p+p{margin-top:8px}.codecard{background:var(--klang-warm-gray-light);border:1px solid var(--border-subtle);border-radius:12px;overflow:hidden;margin:20px 0;min-width:0;max-width:100%}.codecard__head{display:flex;align-items:center;border-bottom:1px solid var(--border-subtle);background:var(--klang-white);min-width:0}.codecard__tab{padding:10px 18px;font-size:12.5px;font-weight:500;color:var(--text-secondary);background:transparent;border:0;cursor:pointer;font-family:var(--font-sans);border-bottom:2px solid transparent;margin-bottom:-1px;transition:color var(--dur-fast) var(--ease-standard),border-color var(--dur-fast) var(--ease-standard)}.codecard__tab:hover{color:var(--text-primary)}.codecard__tab.active{color:var(--klang-blue);border-bottom-color:var(--klang-blue)}.codecard__filename{margin-left:auto;color:var(--text-secondary);font-family:JetBrains Mono,ui-monospace,monospace;font-size:11.5px;padding:0 16px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.codecard__copy{background:transparent;border:0;color:var(--text-secondary);padding:8px 14px;cursor:pointer;border-left:1px solid var(--border-subtle);transition:color var(--dur-fast) var(--ease-standard);display:flex;align-items:center;gap:6px;font-family:var(--font-sans);font-size:12px}.codecard__copy:hover{color:var(--text-primary)}.codecard__copy .copy-done{display:none;align-items:center;gap:6px}.codecard__copy .copy-default{display:inline-flex;align-items:center;gap:6px}.codecard__copy.is-copied .copy-default{display:none}.codecard__copy.is-copied .copy-done{display:inline-flex}.codecard__bodies{display:block}.codecard__body{padding:18px 22px;font-family:JetBrains Mono,ui-monospace,monospace;font-size:13.5px;line-height:1.7;color:var(--text-primary);overflow-x:auto;white-space:pre;display:none}.codecard__body.is-active{display:block}.codecard .tk-key{color:#b3306f}.codecard .tk-str,.codecard .tk-num{color:var(--mui-success)}.codecard .tk-com{color:var(--text-secondary);font-style:italic}.codecard .tk-kw{color:#b3306f}.codecard .tk-meth{color:var(--klang-blue);font-weight:600}.callout{display:flex;gap:12px;padding:14px 16px;background:#212bfa0f;border-left:3px solid var(--klang-blue);border-radius:4px;margin:20px 0;font-size:14px;line-height:1.55}.callout .msr{font-size:20px;color:var(--klang-blue);flex-shrink:0}.callout strong{color:var(--text-primary)}.next-card{display:flex;align-items:center;gap:16px;padding:20px 24px;background:#fff;border:1px solid var(--border-subtle);border-radius:12px;text-decoration:none;color:var(--text-primary);margin-top:24px;transition:border-color var(--dur-base) var(--ease-standard),transform var(--dur-base) var(--ease-standard)}.next-card:hover{border-color:var(--klang-blue);text-decoration:none;transform:translateY(-1px)}.next-card__title{font-weight:600;font-size:16px;margin-bottom:2px}.next-card__desc{font-size:14px;color:var(--text-secondary)}.next-card__arrow{margin-left:auto;color:var(--klang-blue);font-size:28px}@media(max-width:880px){.gs-side{display:none}.gs-layout{grid-template-columns:1fr}}@media(max-width:1100px){.codecard__tab{padding:10px 14px;font-size:12px}.codecard__copy{padding:8px 12px;font-size:11.5px}}@media(max-width:900px){.codecard__filename{display:none}}@media(max-width:600px){.gs-hero__meta{flex-wrap:wrap;gap:16px}.step h2{font-size:24px}.codecard__tab{padding:8px 10px;font-size:11.5px}.codecard__copy{padding:6px 10px;font-size:11px}.codecard__copy .copy-default span:not(.msr),.codecard__copy .copy-done span:not(.msr){display:none}.codecard__body{padding:14px 16px;font-size:12.5px}}