/* Signatum — демо на лендинге. Префикс sd-. Цвета берутся из переменных лендинга, с запасными значениями. */
.sd {
  --sd-black: var(--black, #0a0a0a);
  --sd-gray: var(--gray, #6b6b68);
  --sd-border: var(--border, #e5e5e3);
  --sd-light: var(--light, #f5f5f4);
  --sd-bg: var(--bg, #ffffff);
  --sd-panel: #fafaf9;
  --sd-paper: #ffffff;
  --sd-ink: #111111;
  --sd-client: #fde8d4; --sd-client-line: #f6c9a1;
  --sd-common: #ece6da; --sd-common-line: #d8cdb6;
  --sd-edit: #e8f5ec; --sd-ok: #16a34a; --sd-err: #dc2626;
  max-width: 1200px; margin: 0 auto; padding: 96px 56px;
  font-family: Inter, 'Helvetica Neue', Arial, sans-serif; color: var(--sd-black);
  scroll-margin-top: 80px;
}
[data-theme="dark"] .sd { --sd-panel: #161616; --sd-paper: #fbfbf9; }

.sd__head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; padding-bottom: 22px; border-bottom: 1px solid var(--sd-border); margin-bottom: 36px; }
.sd__title { margin: 0; font-size: clamp(30px, 4vw, 46px); line-height: 1.05; font-weight: 900; letter-spacing: -1.2px; }
.sd__title em { font-style: italic; color: var(--sd-gray); }
.sd__kicker { flex: none; font-size: 11px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--sd-gray); }

.sd__grid { display: grid; grid-template-columns: 400px minmax(0, 1fr); gap: 40px; align-items: start; }

/* панель управления */
.sd__panel { display: flex; flex-direction: column; gap: 22px; padding: 26px; border: 1px solid var(--sd-border); border-radius: 14px; background: var(--sd-panel); }
.sd__group { display: flex; flex-direction: column; gap: 8px; }
.sd__label { font-size: 12px; font-weight: 700; color: var(--sd-black); }
.sd__muted { font-weight: 400; color: var(--sd-gray); font-size: 13px; }
.sd__label .sd__muted { font-size: 12px; }
.sd__row { display: flex; gap: 8px; }
.sd__input { flex: 1; min-width: 0; font: 500 16px Inter, sans-serif; padding: 12px 14px; border: 1px solid var(--sd-border); border-radius: 9px; background: var(--sd-bg); color: var(--sd-black); outline: none; }
.sd__input:focus { border-color: var(--sd-black); }
.sd__input.is-err { border-color: var(--sd-err); }
.sd__btn { font: 700 14px Inter, sans-serif; padding: 12px 16px; border-radius: 9px; border: 0; background: var(--sd-black); color: var(--sd-bg); cursor: pointer; white-space: nowrap; }
.sd__btn:disabled { opacity: .55; cursor: progress; }
.sd__hint { font-size: 12.5px; color: var(--sd-gray); min-height: 18px; }
.sd__hint.is-ok { color: var(--sd-ok); font-weight: 600; }
.sd__hint.is-err { color: var(--sd-err); }
.sd__link { font: inherit; color: var(--sd-black); background: none; border: 0; padding: 0; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }

.sd__seg { display: inline-flex; align-self: flex-start; padding: 3px; gap: 2px; border: 1px solid var(--sd-border); border-radius: 9px; background: var(--sd-light); }
.sd__seg button { font: 600 13px Inter, sans-serif; padding: 7px 14px; border: 0; border-radius: 7px; background: transparent; color: var(--sd-gray); cursor: pointer; }
.sd__seg button[aria-checked="true"] { background: var(--sd-bg); color: var(--sd-black); box-shadow: 0 1px 2px rgba(0,0,0,.08); }
.sd__chips { display: flex; flex-wrap: wrap; gap: 8px; }
.sd__chips button { font: 600 14px Inter, sans-serif; padding: 9px 13px; border-radius: 8px; border: 1.5px solid var(--sd-border); background: var(--sd-bg); color: var(--sd-black); cursor: pointer; }
.sd__chips button[aria-checked="true"] { background: var(--sd-black); border-color: var(--sd-black); color: var(--sd-bg); }

/* документ */
.sd__docwrap { position: relative; }
.sd__badge { position: absolute; top: -13px; right: 20px; z-index: 2; font-size: 11px; font-weight: 700; padding: 5px 10px; border-radius: 6px; background: #0a0a0a; color: #fff; transition: background .2s; }
.sd__badge.is-ok { background: var(--sd-ok); }
.sd__doc { background: var(--sd-paper); color: var(--sd-ink); border: 1px solid #e5e5e3; border-radius: 6px; box-shadow: 0 24px 60px rgba(10,10,10,.10); padding: 40px 52px; font-family: 'Times New Roman', Georgia, serif; font-size: 16.5px; line-height: 1.7; }
.sd__doc h3 { margin: 0; text-align: center; font-size: 17px; font-weight: 700; }
.sd__doc .sd-date { display: flex; justify-content: space-between; margin: 10px 0 14px; }
.sd__doc p { margin: 0 0 10px; text-align: justify; }
.sd__doc .sd-req { font-size: 14px; color: #45453f; text-align: left; }
.sd__doc .sd-sign { margin-top: 14px; font-size: 14px; }
.sd-v { border-radius: 3px; padding: 0 3px; background: var(--sd-client); box-shadow: inset 0 -2px 0 var(--sd-client-line); color: inherit; }
.sd-v.is-common { background: var(--sd-common); box-shadow: inset 0 -2px 0 var(--sd-common-line); }
.sd-slot { display: inline-block; border: 1.5px dashed #c9c9c5; border-radius: 4px; padding: 0 6px; color: #9a9a96; font: 13px/1.6 Inter, sans-serif; white-space: nowrap; vertical-align: 1px; }
.sd-edit { border-radius: 4px; padding: 2px 4px; margin: 0 -4px; transition: background .4s; }
.sd-edit.is-on { background: var(--sd-edit); }
.sd-flash { animation: sd-flash 1s ease-out; }
@keyframes sd-flash { from { background: #fff3b0; } }

.sd__cta { display: flex; align-items: center; gap: 20px; margin-top: 36px; flex-wrap: wrap; }
.sd__ctabtn { text-decoration: none; background: var(--sd-black); color: var(--sd-bg); padding: 15px 30px; border-radius: 9px; font-size: 15px; font-weight: 700; }

@media (max-width: 1024px) {
  .sd__grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
}
@media (max-width: 768px) {
  .sd { padding: 64px 20px; }
  .sd__head { flex-direction: column; align-items: flex-start; gap: 10px; }
  .sd__panel { padding: 20px; }
  .sd__doc { padding: 26px 22px; font-size: 15px; }
  .sd-slot { white-space: normal; }
}
@media (prefers-reduced-motion: reduce) { .sd-flash { animation: none; } .sd-edit, .sd__badge { transition: none; } }