/* ==========================================================================
   DuoPower DG-2264 — «Технический чертёж / спецификация»
   Светлый чертёжный лист, угловые регистрационные метки, размерные линии,
   таблица данных, шестигранные узлы легенды.
   ========================================================================== */

:root{
  --sheet:        #EAF2F3;   /* светлый чертёжный лист (пастельный циан) */
  --sheet-panel:  #DCE9EA;   /* панель темнее */
  --sheet-card:   #F7FBFB;   /* карточки/поля поверх листа */
  --grid-line:    #C3D9DB;   /* линии сетки/разделители */

  --ink:          #24393D;   /* основной текст и линии чертежа */
  --ink-soft:     #5C7378;   /* второстепенный текст */

  --redline:      #E2735A;   /* акцент — красная линия разметки чертежа */
  --redline-deep: #B85640;
  --amber:        #E8B84B;   /* второй акцент — маркер/подсветка */
  --amber-deep:   #B98A2C;

  --font-display: "Oswald", "Arial Narrow", sans-serif;
  --font-mono:    "JetBrains Mono", "Courier New", monospace;
  --font-body:    "Inter", "Segoe UI", sans-serif;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--sheet);
  background-image: linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 34px 34px;
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; }
h1,h2,h3{ font-family: var(--font-display); font-weight:600; margin:0; color: var(--ink); text-transform: uppercase; }
p{ margin:0; }
ul,ol,dl,table{ margin:0; padding:0; list-style:none; border-collapse:collapse; }
button{ font-family:inherit; cursor:pointer; }
mark{ background:none; color: var(--redline-deep); }

.sheet-container{ width:100%; max-width: 1160px; margin:0 auto; padding: 0 24px; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration:.01ms !important; transition-duration:.01ms !important; }
}
:focus-visible{ outline: 2px solid var(--redline-deep); outline-offset: 2px; }

/* ---------------------------- утилита: угловые регистрационные метки ---------------------------- */
.corner-frame{
  position:relative;
  background-color: var(--sheet-card);
  background-image:
    linear-gradient(var(--ink), var(--ink)), linear-gradient(var(--ink), var(--ink)),
    linear-gradient(var(--ink), var(--ink)), linear-gradient(var(--ink), var(--ink)),
    linear-gradient(var(--ink), var(--ink)), linear-gradient(var(--ink), var(--ink)),
    linear-gradient(var(--ink), var(--ink)), linear-gradient(var(--ink), var(--ink));
  background-repeat: no-repeat;
  background-size:
    14px 2px, 2px 14px,
    14px 2px, 2px 14px,
    14px 2px, 2px 14px,
    14px 2px, 2px 14px;
  background-position:
    10px 10px, 10px 10px,
    calc(100% - 24px) 10px, calc(100% - 12px) 10px,
    10px calc(100% - 12px), 10px calc(100% - 24px),
    calc(100% - 24px) calc(100% - 12px), calc(100% - 12px) calc(100% - 24px);
  border: 1px solid var(--grid-line);
}

/* ---------------------------- кнопки: жёсткая тень чертёжного штампа ---------------------------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding: 14px 26px;
  font-family: var(--font-mono);
  font-weight:700; font-size: 0.86rem; letter-spacing:.03em; text-transform:uppercase;
  text-decoration:none;
  border: 2px solid var(--ink);
  background: var(--sheet-card);
  color: var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn:hover{ transform: translate(2px,2px); box-shadow: 2px 2px 0 var(--ink); }
.btn--primary{ background: var(--redline); color:#fff; border-color: var(--redline-deep); box-shadow: 4px 4px 0 var(--redline-deep); }
.btn--primary:hover{ box-shadow: 2px 2px 0 var(--redline-deep); }
.btn--outline{ background: transparent; }
.btn--sm{ padding: 9px 18px; font-size: 0.76rem; box-shadow: 3px 3px 0 var(--ink); }
.btn--sm:hover{ box-shadow: 1.5px 1.5px 0 var(--ink); }
.btn[disabled]{ opacity:.55; cursor:not-allowed; transform:none !important; }

/* ---------------------------- шапка: чертёжная линейка ---------------------------- */
.blueprint-bar{ position:sticky; top:0; z-index:50; background: var(--sheet); border-bottom: 1px solid var(--grid-line); }
.blueprint-bar__inner{ display:flex; align-items:center; justify-content:space-between; gap:24px; padding: 12px 24px; }

.title-block{ display:flex; flex-direction:column; border: 1.5px solid var(--ink); text-decoration:none; color: var(--ink); flex:0 0 auto; }
.title-block__brand{ font-family: var(--font-display); font-weight:700; font-size: 0.9rem; text-transform:uppercase; letter-spacing:.03em; padding: 5px 12px; border-bottom: 1px solid var(--ink); }
.title-block__row{ display:flex; }
.title-block__row span{ flex:1; padding: 3px 8px; font-family: var(--font-mono); font-size: 0.52rem; text-transform:uppercase; border-right: 1px solid var(--ink); white-space:nowrap; }
.title-block__row span:last-child{ border-right:none; }

.draft-nav{ display:flex; gap:24px; }
.draft-nav a{ display:flex; align-items:center; gap:6px; text-decoration:none; color: var(--ink-soft); font-family: var(--font-mono); font-weight:600; font-size: 0.78rem; text-transform:uppercase; transition:color .15s ease; }
.draft-nav a b{ color: var(--redline-deep); font-weight:700; }
.draft-nav a:hover{ color: var(--ink); }
@media (max-width: 860px){ .draft-nav{ display:none; } }

/* ---------------------------- главный чертёж (hero) ---------------------------- */
.drawing-sheet{ padding: 50px 0 0; }
.drawing-sheet__grid{ display:grid; grid-template-columns: 1.1fr 0.9fr; gap: 50px; align-items:start; padding-bottom: 60px; }

.spec-frame{ padding: 32px 32px 36px; }
.spec-frame__tag{ display:block; font-family: var(--font-mono); font-size: 0.7rem; color: var(--redline-deep); letter-spacing:.06em; border-bottom: 1px dashed var(--grid-line); padding-bottom: 12px; margin-bottom: 20px; }
.drawing-sheet__title{ font-size: clamp(1.9rem, 3.4vw, 2.7rem); line-height:1.1; }
.drawing-sheet__title mark{ text-decoration: underline; text-decoration-color: var(--redline); text-decoration-thickness: 3px; text-underline-offset: 4px; }
.torn-underline{ width: 170px; height: 12px; margin: 12px 0 20px; display:block; }
.drawing-sheet__lead{ max-width: 46ch; color: var(--ink-soft); font-size: 1.02rem; text-transform:none; }

.value-row{ display:flex; gap: 12px; margin-top: 26px; flex-wrap:wrap; }
.value-chip{ font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-soft); border: 1px solid var(--grid-line); padding: 9px 13px; display:flex; flex-direction:column; gap:2px; background: var(--sheet); }
.value-chip b{ font-weight:700; color: var(--ink); font-size: 1rem; }
.value-chip--wide{ flex-direction:row; align-items:center; gap:10px; padding: 12px 18px; }

.drawing-sheet__actions{ display:flex; gap:14px; margin-top: 28px; flex-wrap:wrap; }

.viewport-wrap{ position:relative; padding-top: 10px; }
.viewport{ position:relative; overflow:hidden; }
.viewport--main{ width:100%; aspect-ratio: 1/1; max-width: 420px; margin: 0 auto; }
.viewport img{ width:100%; height:100%; object-fit: cover; display:block; }
.viewport__id{ position:absolute; bottom: 8px; right: 12px; font-family: var(--font-mono); font-size: 0.66rem; color: var(--ink-soft); background: var(--sheet-card); padding: 2px 6px; }

.callout{
  position:absolute;
  font-family: var(--font-mono); font-weight:700; font-size: 0.86rem;
  background: var(--sheet-card); border: 2px solid var(--ink);
  padding: 8px 12px; display:flex; flex-direction:column; align-items:center; line-height:1.2;
}
.callout small{ font-weight:500; font-size: 0.58rem; color: var(--ink-soft); text-transform:uppercase; margin-top:2px; }
.callout--a{ top: 6%; left: -6%; border-color: var(--redline-deep); color: var(--redline-deep); }
.callout--b{ bottom: 8%; right: -6%; border-color: var(--amber-deep); color: var(--amber-deep); }
@media (max-width: 900px){ .drawing-sheet__grid{ grid-template-columns:1fr; } .callout--a{ left:2%; } .callout--b{ right:2%; } }

/* сигнатурный элемент: размерная линия-разделитель */
.dimension-rule{ height: 30px; display:flex; align-items:center; padding: 0 24px; }
.dimension-rule span{ flex:1; height:1px; background: var(--grid-line); position:relative; }
.dimension-rule span::before, .dimension-rule span::after{ content:""; position:absolute; top:-5px; width:1px; height:11px; background: var(--grid-line); }
.dimension-rule span::before{ left:0; } .dimension-rule span::after{ right:0; }
.dimension-rule--wide{ height:40px; background: var(--sheet-panel); }

/* ---------------------------- примечание ---------------------------- */
.note-strip{ padding: 44px 0; }
.note-strip__text{
  max-width: 860px; margin:0 auto; text-align:center;
  font-size: 1.08rem; color: var(--ink); line-height:1.7;
}
.note-strip__text b{ font-family: var(--font-mono); color: var(--redline-deep); font-weight:700; }

/* ---------------------------- секции общие ---------------------------- */
.section{ padding: 80px 0; }
.section--tinted{ background: var(--sheet-panel); }
.section-kicker{ font-family: var(--font-mono); text-transform:uppercase; letter-spacing:.09em; font-size:0.76rem; font-weight:700; color: var(--redline-deep); margin-bottom: 12px; }
.section-heading{ font-size: clamp(1.4rem, 2.4vw, 1.95rem); max-width: 700px; line-height:1.28; margin-bottom: 44px; }

/* ---------------------------- легенда (шестигранные узлы) ---------------------------- */
.legend-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap: 30px 24px; }
.legend-node{ position:relative; background: var(--sheet-card); border: 1px solid var(--grid-line); padding: 30px 22px 24px; }
.legend-node__hex{
  position:absolute; top:-16px; left: 20px;
  width: 38px; height: 34px;
  clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
  background: var(--ink); color: var(--sheet-card);
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-mono); font-weight:700; font-size: 0.72rem;
}
.legend-node__icon{ width:40px; height:40px; border-radius:50%; background: var(--sheet-panel); color: var(--redline-deep); display:flex; align-items:center; justify-content:center; margin: 12px 0 16px; }
.legend-node h3{ font-size: 0.98rem; margin-bottom: 8px; text-transform:none; }
.legend-node p{ color: var(--ink-soft); font-size: 0.9rem; text-transform:none; }
@media (max-width: 860px){ .legend-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 560px){ .legend-grid{ grid-template-columns: 1fr; } }

/* ---------------------------- виды / галерея ---------------------------- */
.viewport-grid{ display:grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.viewport-grid .viewport{ aspect-ratio: 4/3; }
@media (max-width: 860px){ .viewport-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 560px){ .viewport-grid{ grid-template-columns: 1fr; } }

/* ---------------------------- таблица данных + размерная схема ---------------------------- */
.datasheet__grid{ display:grid; grid-template-columns: 1.15fr 0.85fr; gap: 60px; }
.data-table{ width:100%; }
.data-table tr{ border-bottom: 1px solid var(--grid-line); }
.data-table tr:nth-child(even){ background: var(--sheet-panel); }
.data-table th{ text-align:left; font-weight:500; font-size: 0.86rem; color: var(--ink-soft); padding: 12px 14px; text-transform:none; }
.data-table td{ text-align:right; font-family: var(--font-mono); font-weight:700; font-size: 0.9rem; padding: 12px 14px; }

.datasheet__caption{ margin-top: 34px; font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink-soft); text-transform:uppercase; letter-spacing:.04em; }

.dimension-diagram{ margin-top: 18px; display:flex; flex-direction:column; gap: 16px; }
.dimension{ display:flex; align-items:center; gap: 12px; }
.dimension__label{ font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-soft); text-transform:uppercase; width: 70px; flex:0 0 auto; }
.dimension__line{ flex:1; height:1px; background: var(--ink); position:relative; }
.dimension__line::before, .dimension__line::after{ content:""; position:absolute; top:-5px; width:1px; height:11px; background: var(--ink); }
.dimension__line::before{ left:0; } .dimension__line::after{ right:0; }
.dimension__value{ font-family: var(--font-mono); font-weight:700; font-size: 0.86rem; color: var(--redline-deep); border: 1.5px solid var(--redline); padding: 3px 10px; background: var(--sheet-card); flex:0 0 auto; }

.manifest{ display:flex; flex-direction:column; gap: 10px; margin-bottom: 26px; }
.manifest li{ display:flex; align-items:center; gap: 14px; background: var(--sheet-card); border: 1px solid var(--grid-line); padding: 12px 16px; font-size: 0.92rem; }
.manifest__pos{ font-family: var(--font-mono); font-weight:700; color: var(--redline-deep); font-size: 0.76rem; border: 1px solid var(--redline); padding: 2px 6px; flex:0 0 auto; }
.viewport--kit{ max-width: 320px; aspect-ratio: 16/10; }
@media (max-width: 860px){ .datasheet__grid{ grid-template-columns: 1fr; gap: 40px; } }

/* ---------------------------- процедура запуска ---------------------------- */
.procedure{ position:relative; display:grid; grid-template-columns: repeat(4,1fr); gap: 22px; padding-top: 26px; }
.procedure::before{ content:""; position:absolute; top: 13px; left: 4%; right:4%; height:0; border-top: 1px dashed var(--grid-line); }
.procedure__step{ position:relative; text-align:center; }
.procedure__marker{ position:relative; z-index:1; display:inline-flex; align-items:center; justify-content:center; width:28px; height:28px; background: var(--sheet-panel); border: 2px solid var(--ink); font-family: var(--font-mono); font-weight:700; font-size: 0.74rem; margin-bottom: 16px; }
.procedure__step h3{ font-size: 0.92rem; margin-bottom: 8px; text-transform:none; }
.procedure__step p{ font-size: 0.86rem; color: var(--ink-soft); text-transform:none; }
@media (max-width: 860px){ .procedure{ grid-template-columns: 1fr 1fr; } .procedure::before{ display:none; } }
@media (max-width: 560px){ .procedure{ grid-template-columns: 1fr; } }

/* ---------------------------- сертификация / доверие ---------------------------- */
.cert-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.cert-badge{ text-align:center; padding: 24px 18px; }
.cert-badge__ring{ width:58px; height:58px; margin: 0 auto 16px; border-radius:50%; border: 2px solid var(--ink); position:relative; display:flex; align-items:center; justify-content:center; color: var(--ink); }
.cert-badge__ring::before{ content:""; position:absolute; inset: 4px; border: 1px solid var(--grid-line); border-radius:50%; }
.cert-badge h3{ font-size: 0.94rem; margin-bottom:8px; text-transform:none; }
.cert-badge p{ font-size: 0.86rem; color: var(--ink-soft); text-transform:none; }
@media (max-width: 700px){ .cert-grid{ grid-template-columns:1fr; } }

/* ---------------------------- журнал ревизий (FAQ) ---------------------------- */
.revision-log{ display:flex; flex-direction:column; gap: 10px; max-width: 800px; }
.revision-item{ background: var(--sheet-card); border: 1px solid var(--grid-line); border-left: 4px solid var(--redline-deep); padding: 4px 20px; }
.revision-item summary{ cursor:pointer; list-style:none; padding: 15px 0; font-weight:600; display:flex; align-items:baseline; gap:12px; text-transform:none; }
.revision-item summary::-webkit-details-marker{ display:none; }
.revision-item__tag{ font-family: var(--font-mono); color: var(--redline-deep); font-size: 0.76rem; flex:0 0 auto; }
.revision-item p{ padding-bottom: 18px; color: var(--ink-soft); font-size: 0.9rem; text-transform:none; }

/* ---------------------------- требование-накладная (форма заказа) ---------------------------- */
.requisition{ background: var(--sheet-panel); }
.requisition__intro{ display:flex; align-items:flex-end; justify-content:space-between; gap: 24px; flex-wrap:wrap; margin-bottom: 34px; padding-bottom: 24px; border-bottom: 1px dashed var(--grid-line); }
.requisition__intro .section-heading{ margin-bottom:0; }

.requisition-form{ position:relative; background: var(--sheet-card); border: 1.5px solid var(--ink); padding: 22px 28px 26px; }
.requisition-form__tag{ position:absolute; top:-11px; left:26px; background: var(--sheet-card); font-family: var(--font-mono); font-weight:700; letter-spacing:.06em; font-size:0.7rem; color: var(--redline-deep); padding: 0 10px; }

.requisition-row{ display:flex; align-items:flex-start; }
.field-cell{ position:relative; display:flex; flex-direction:column; flex:1 1 0; gap:6px; padding: 0 22px; border-left: 1px solid var(--grid-line); }
.requisition-row > .field-cell:first-child{ padding-left:4px; border-left:none; }
.field-cell--grow{ flex: 1.4 1 0; }
.field-cell__label{ font-weight:700; font-size:0.76rem; font-family: var(--font-mono); text-transform:uppercase; color: var(--ink-soft); }
.field-cell__label em{ font-weight:400; font-style:normal; text-transform:none; }
.field-cell input[type="text"], .field-cell input[type="tel"]{
  width:100%; border:none; border-bottom: 1.5px solid var(--grid-line); background:transparent;
  padding: 8px 2px; font-family: var(--font-body); font-size: 0.95rem; color: var(--ink);
  transition: border-color .15s ease;
}
.field-cell input:focus{ border-bottom-color: var(--redline-deep); outline:none; }
.field-cell input.is-invalid{ border-bottom-color: var(--redline-deep); }
.field-cell__error{ display:block; min-height:1.1em; font-size:0.68rem; color: var(--redline-deep); font-weight:600; font-family: var(--font-mono); margin-top:2px; }

.requisition-row__submit{ flex:0 0 auto; align-self:stretch; margin-left:18px; white-space:nowrap; }

.requisition-form__hint{ margin-top:16px; font-size:0.74rem; color: var(--ink-soft); font-family: var(--font-mono); }
.requisition-form__note{ font-size:0.82rem; margin-top:6px; min-height:1.2em; color: var(--redline-deep); font-weight:600; font-family: var(--font-mono); }

@media (max-width: 980px){
  .requisition-row{ flex-wrap:wrap; row-gap: 20px; }
  .field-cell{ flex:1 1 220px; border-left:none; border-top:1px solid var(--grid-line); padding: 16px 4px 0; }
  .requisition-row > .field-cell:first-child{ border-top:none; padding-top:0; }
  .requisition-row__submit{ flex:1 1 100%; margin-left:0; margin-top:6px; }
}
@media (max-width: 640px){ .requisition__intro{ flex-direction:column; align-items:flex-start; } }

/* ---------------------------- футер ---------------------------- */
.sheet-footer{ background: var(--ink); color: rgba(234,242,243,0.82); padding: 50px 0 22px; }
.sheet-footer__inner{ display:grid; grid-template-columns: 1.3fr 1fr 1fr; gap:40px; padding-bottom:28px; border-bottom: 1px dashed rgba(234,242,243,0.2); }
.sheet-footer__logo{ font-family: var(--font-display); font-weight:700; font-size:1.15rem; text-transform:uppercase; color: var(--sheet-card); }
.sheet-footer__brand p{ margin-top:12px; font-size:0.85rem; max-width:32ch; opacity:.75; }
.sheet-footer__contacts p{ margin-bottom:10px; font-size:0.88rem; font-family: var(--font-mono); }
.sheet-footer__contacts a{ text-decoration:none; }
.sheet-footer__contacts a:hover{ text-decoration:underline; }
.sheet-footer__nav{ display:flex; flex-direction:column; gap:10px; }
.sheet-footer__nav a{ text-decoration:none; font-size:0.86rem; opacity:.85; font-family: var(--font-mono); text-transform:uppercase; }
.sheet-footer__nav a:hover{ opacity:1; text-decoration:underline; }
.sheet-footer__bottom{ padding-top:18px; font-size:0.76rem; opacity:.55; font-family: var(--font-mono); line-height:1.7; }
@media (max-width: 700px){ .sheet-footer__inner{ grid-template-columns:1fr; } }