:root{--oc-ink:#14213d;--oc-muted:#5d6880;--oc-line:#dfe6f0;--oc-bg:#f5f8fc;--oc-card:#fff;--oc-brand:#2563eb;--oc-brand-dark:#1748b4;--oc-good:#087f5b;--oc-danger:#b42318;--oc-radius:18px;--oc-shadow:0 16px 48px rgba(20,33,61,.09)}
.oc-page{max-width:1120px;margin:0 auto;padding:48px 20px 80px;color:var(--oc-ink)}
.oc-article{max-width:900px;margin:0 auto}
.oc-hero{text-align:center;margin:0 auto 30px;max-width:760px}
.oc-kicker{margin:0 0 10px;color:var(--oc-brand);font-size:.82rem;font-weight:800;letter-spacing:.11em;text-transform:uppercase}
.oc-hero h1{font-size:clamp(2rem,5vw,3.5rem);line-height:1.05;letter-spacing:-.04em;margin:0 0 16px}
.oc-hero>p:last-child{color:var(--oc-muted);font-size:1.1rem;line-height:1.65}
.oc-card{background:var(--oc-card);border:1px solid var(--oc-line);border-radius:var(--oc-radius);box-shadow:var(--oc-shadow);padding:clamp(20px,4vw,38px);margin:28px 0 44px}
.oc-inputs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.oc-field>span{display:block;font-size:.9rem;font-weight:750;margin:0 0 7px}
.oc-input-wrap{display:flex;align-items:center;border:1px solid #cbd5e1;border-radius:12px;background:#fff;overflow:hidden;transition:.2s ease}
.oc-input-wrap:focus-within{border-color:var(--oc-brand);box-shadow:0 0 0 3px rgba(37,99,235,.13)}
.oc-input-wrap input{width:100%;min-width:0;border:0!important;box-shadow:none!important;padding:12px 8px!important;font:inherit;background:transparent;color:var(--oc-ink)}
.oc-affix{padding:0 0 0 13px;color:var(--oc-muted);font-weight:700}.oc-input-wrap input+.oc-affix{padding:0 13px 0 0}
.oc-result{margin-top:24px;padding:22px;border-radius:14px;background:linear-gradient(135deg,#eff6ff,#f8fbff);border:1px solid #bfdbfe}
.oc-result-row{display:flex;justify-content:space-between;gap:20px;padding:9px 0;border-bottom:1px solid rgba(37,99,235,.12)}
.oc-result-row:last-of-type{border:0}.oc-result-row span{color:var(--oc-muted)}.oc-result-row strong{font-size:1.08rem;text-align:right}
.oc-error{color:var(--oc-danger);font-weight:700;margin:14px 0 0}
.oc-copy{margin-top:16px;border:0;border-radius:10px;background:var(--oc-brand);color:#fff;padding:10px 15px;font-weight:800;cursor:pointer}.oc-copy:hover{background:var(--oc-brand-dark)}
.oc-formula{margin:22px 0 0;color:var(--oc-muted);font-size:.95rem}
.oc-seo-content{font-size:1.04rem;line-height:1.75}.oc-seo-content h2{margin-top:42px;font-size:1.65rem;letter-spacing:-.02em}.oc-seo-content h3{margin-top:24px;font-size:1.1rem}.oc-seo-content code{white-space:normal;background:#eef2f7;padding:4px 8px;border-radius:7px}
.oc-related{margin-top:48px;padding-top:28px;border-top:1px solid var(--oc-line)}.oc-related>div{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.oc-related a{display:block;padding:14px 16px;border:1px solid var(--oc-line);border-radius:12px;text-decoration:none;font-weight:750}.oc-related a:hover{border-color:var(--oc-brand);color:var(--oc-brand)}
.oc-directory{max-width:1120px;margin:0 auto;padding:24px 0}.oc-search{position:sticky;top:12px;z-index:3;background:rgba(255,255,255,.93);backdrop-filter:blur(10px);padding:15px;border:1px solid var(--oc-line);border-radius:14px;margin-bottom:24px}.oc-search label{font-weight:800;margin-right:14px}.oc-search input{width:min(100%,620px);padding:12px 14px;border:1px solid #cbd5e1;border-radius:10px;font:inherit}
.oc-ad-slot{width:100%;min-height:90px;margin:28px auto;padding:8px;text-align:center;overflow:hidden}
.oc-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.oc-tool-card{border:1px solid var(--oc-line);border-radius:16px;background:#fff;padding:22px;box-shadow:0 8px 25px rgba(20,33,61,.05)}.oc-tool-card>span{color:var(--oc-brand);font-size:.76rem;font-weight:800;text-transform:uppercase;letter-spacing:.08em}.oc-tool-card h2{font-size:1.15rem;margin:9px 0}.oc-tool-card h2 a{text-decoration:none;color:var(--oc-ink)}.oc-tool-card p{color:var(--oc-muted);font-size:.92rem;line-height:1.55;margin:0}.oc-tool-card[hidden]{display:none}.oc-empty{text-align:center;padding:40px;color:var(--oc-muted)}
@media(max-width:760px){.oc-page{padding-top:28px}.oc-inputs,.oc-related>div{grid-template-columns:1fr}.oc-grid{grid-template-columns:1fr}.oc-card{padding:18px}.oc-search{position:static}.oc-search label{display:block;margin:0 0 8px}.oc-search input{width:100%}.oc-result-row{align-items:flex-start}}