:root{--slate: #3f5364;--slate-700: #36454f;--slate-deep: #2b3741;--slate-deeper: #232e36;--page: #e7ecef;--paper: #ffffff;--paper-2: #f5f7f8;--ink: #28384a;--muted-ink: #6c7a86;--line: #dde2e6;--line-strong: #c2cbd1;--on-slate: #ffffff;--on-slate-soft: #a9b8c4;--font-display: "Jost", "Avenir Next", system-ui, sans-serif;--font-body: "Mulish", "Avenir Next", system-ui, sans-serif;--font-mono: ui-monospace, "SF Mono", Menlo, monospace}*{box-sizing:border-box;margin:0;padding:0}*:focus-visible{outline:2px solid var(--slate);outline-offset:2px}html,body{height:100%;max-width:100%;overflow-x:hidden}@media (prefers-reduced-motion: reduce){*,*:before,*:after{transition-duration:.01ms!important;animation:none!important}}body{font-family:var(--font-body);color:var(--ink);min-height:100dvh;display:flex;flex-direction:column;background:var(--page);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}.site-header{display:flex;align-items:baseline;gap:1.1rem;padding:.95rem 2.5rem;background:var(--slate);color:var(--on-slate);border-bottom:1px solid rgba(0,0,0,.22);box-shadow:0 1px #ffffff0f inset}.site-header__logo{display:block;height:32px;width:auto}.site-header__tagline{font-size:.6rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--on-slate-soft);padding-left:1.1rem;border-left:1px solid rgba(255,255,255,.25);align-self:center}.layout{width:100%;max-width:1120px;margin:0 auto;padding:3.5rem 2.5rem 4.5rem;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:2.5rem;align-items:start;flex:1}.stack{display:flex;flex-direction:column;gap:2.5rem}.panel{background:var(--paper);border:1px solid var(--line);color:var(--ink);min-width:0;max-width:100%;box-shadow:0 6px 18px -14px #28384a2e}.panel__header{font-family:var(--font-display);font-size:.74rem;font-weight:500;letter-spacing:.08em;text-transform:uppercase;color:var(--slate);padding:1rem 1.6rem;border-bottom:1px solid var(--line);background:var(--paper-2)}.panel__body{padding:1.75rem 1.6rem}.form__row{display:grid;grid-template-columns:1fr 1fr;gap:.9rem;margin-bottom:.95rem}.form__field{margin-bottom:.95rem}.form__field:last-child{margin-bottom:0}.form__row .form__field{margin-bottom:0}.form__label{display:block;font-size:.64rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--muted-ink);margin-bottom:7px}.form__input{width:100%;min-width:0;padding:.65rem .8rem;border:1px solid var(--line-strong);font-family:inherit;font-size:.92rem;line-height:1.4;color:var(--ink);background:var(--paper);outline:none;transition:border-color .15s,box-shadow .15s}.form__input::placeholder{color:var(--muted-ink);opacity:.5}.form__input:hover{border-color:var(--slate)}.form__input:focus{border-color:var(--slate);box-shadow:0 0 0 3px #3f536429}.form__subhead{font-family:var(--font-display);font-size:.64rem;font-weight:500;letter-spacing:.08em;text-transform:uppercase;color:var(--slate);margin:1.6rem 0 .95rem;padding-top:1.4rem;border-top:1px solid var(--line)}.preview__meta{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.1rem}.preview__label{font-size:.64rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--muted-ink)}.preview__modes{display:inline-flex;gap:1rem}.preview__mode{padding:0;font-family:var(--font-display);font-size:.72rem;font-weight:500;letter-spacing:.04em;text-transform:uppercase;background:none;border:none;color:var(--muted-ink);cursor:pointer;transition:color .15s}.preview__mode:hover{color:var(--ink)}.preview__mode--active{color:var(--slate);text-decoration:underline;text-underline-offset:5px;text-decoration-thickness:2px}iframe.preview__display{display:block;width:100%;max-width:100%;padding:0;margin:0;border:1px solid var(--line);background:var(--paper);color-scheme:normal;overflow:hidden;transition:background .2s,border-color .2s}iframe.preview__display--dark{background:var(--slate-deeper);border-color:var(--slate-700)}.copy-button{display:block;width:100%;margin-top:1.4rem;padding:1rem;background:transparent;color:var(--slate);border:1px solid var(--slate);font-family:var(--font-display);font-size:.74rem;font-weight:500;letter-spacing:.08em;text-transform:uppercase;cursor:pointer;transition:background .18s,color .18s,transform .05s}.copy-button:hover{background:var(--slate);color:var(--on-slate)}.copy-button:active{transform:translateY(1px)}.copy-button--ok{background:var(--slate);color:var(--on-slate);border-color:var(--slate)}.manual{display:none;margin-top:1rem}.manual--visible{display:block}.manual__label{display:block;font-size:.7rem;color:var(--muted-ink);margin-bottom:6px}.manual__textarea{width:100%;height:60px;font-size:.7rem;font-family:var(--font-mono);border:1px solid var(--line-strong);padding:.6rem;color:var(--muted-ink);background:var(--paper-2);resize:none;outline:none}.guide__title{font-family:var(--font-display);font-size:.74rem;font-weight:500;text-transform:uppercase;letter-spacing:.08em;color:var(--slate);padding-bottom:1rem;border-bottom:1px solid var(--line);margin-bottom:1.25rem}.guide__steps{font-size:.9rem;color:var(--ink);padding-left:1.5rem;line-height:1.9}.guide__step{padding-left:.3rem}.guide__step::marker{color:var(--slate);font-variant-numeric:tabular-nums}.guide__step strong{font-weight:700;color:var(--slate)}.guide__key{font-family:var(--font-mono);font-size:.78em;padding:1px 6px;border:1px solid var(--line-strong);background:var(--paper-2);color:var(--ink);letter-spacing:0}.site-footer{text-align:center;padding:1.1rem 1rem;font-size:.62rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--muted-ink);background:transparent;border-top:1px solid var(--line)}.site-footer__link{color:var(--slate);text-decoration:none;border-bottom:1px solid var(--line-strong);padding-bottom:1px}.site-footer__link:hover{border-bottom-color:var(--slate)}@media (max-width: 900px){.layout{grid-template-columns:minmax(0,1fr);padding:1.5rem 1rem 2rem;gap:1.5rem;max-width:100%}.panel,.preview__display,.manual__textarea{max-width:100%}.stack{gap:1.5rem}.site-header{padding:1.1rem 1.25rem;flex-direction:column;align-items:flex-start;gap:.5rem}.site-header__tagline{padding-left:0;border-left:none;align-self:auto}.panel__header{padding:.85rem 1rem}.panel__body{padding:1.1rem 1rem}.form__row{grid-template-columns:1fr;gap:0}.form__row .form__field{margin-bottom:.8rem}.form__row .form__field:last-child{margin-bottom:0}.form__field{margin-bottom:.8rem}.form__input{padding:.7rem;font-size:16px}.form__subhead{margin:1.1rem 0 .8rem;padding-top:.95rem}.preview__meta{margin-bottom:.95rem}.preview__modes{gap:1.25rem}.preview__mode{padding:.4rem 0;min-height:40px;display:inline-flex;align-items:center}.preview__display{padding:1rem}.copy-button{padding:1rem;margin-top:1rem}.guide__steps{font-size:.9rem;line-height:1.8;padding-left:1.25rem}.guide__title{padding-bottom:.85rem;margin-bottom:.95rem}}@media (max-width: 380px){.preview__meta{flex-direction:column;align-items:flex-start;gap:.6rem}}