/* ==========================================================================
   Демонстрационный сайт Библиотеки СПбГЭТУ «ЛЭТИ» им. В. И. Ульянова (Ленина)
   Палитра взята с официального сайта library.etu.ru (getComputedStyle):
   основной — тёмно-синий #05336E, акцент-ссылки — голубой #37B1F4,
   логотип — бронза-золото #B08050, светлый акцент — кремовый #FCE4AE.
   Шрифты сайта библиотеки — Roboto Condensed / Arial.
   ========================================================================== */

:root{
  --brand:       #05336E;   /* основной тёмно-синий */
  --brand-dark:  #032751;
  --brand-deep:  #021d3d;
  --accent:      #37B1F4;   /* голубой акцент-ссылки */
  --gold:        #B08050;   /* бронза-золото (логотип) */
  --gold-soft:   #BB8D54;
  --cream:       #FCE4AE;   /* кремовый акцент */
  --ink:         #1c1c1c;
  --text:        #333333;   /* базовый текст */
  --muted:       #6b6b6b;
  --line:        #e5e5e5;
  --bg:          #ffffff;
  --bg-tint:     #f4f7fb;
  --bg-dark:     #08203f;
  --radius:      14px;
  --shadow:      0 6px 24px rgba(5,51,110,.10);
  --shadow-lg:   0 18px 50px rgba(3,25,55,.22);
  --wrap:        1160px;
  --font-head:   "Roboto Condensed", "Arial Narrow", Arial, sans-serif;
  --font-body:   "Roboto", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.65;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{width:min(100% - 40px, var(--wrap));margin-inline:auto}
h1,h2,h3,.h2{font-family:var(--font-head);color:var(--ink);line-height:1.18;font-weight:700}

/* ---------- Topbar ---------- */
.topbar{background:var(--brand-deep);color:#bcd0ea;font-size:13.5px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:38px;flex-wrap:wrap}
.topbar__link{color:var(--cream)}
.topbar__link:hover{color:#fff}

/* ---------- Header ---------- */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header__inner{display:flex;align-items:center;gap:26px;min-height:80px}
.brand{display:flex;align-items:center;gap:13px;color:inherit}
.brand:hover{text-decoration:none}
.brand__mark{display:flex;flex:0 0 auto;filter:drop-shadow(0 4px 12px rgba(5,51,110,.30))}
.brand__text{display:flex;flex-direction:column;line-height:1.16}
.brand__text strong{font-family:var(--font-head);font-size:20px;color:var(--brand);letter-spacing:.01em}
.brand__text small{font-size:12.5px;color:var(--muted)}
.nav{margin-left:auto;display:flex;gap:4px;flex-wrap:wrap}
.nav a{padding:9px 12px;border-radius:8px;color:var(--text);font-size:15.5px;font-family:var(--font-head)}
.nav a:hover{background:#eaf2fb;color:var(--brand);text-decoration:none}
.burger{display:none;margin-left:auto;background:none;border:0;flex-direction:column;gap:5px;padding:8px;cursor:pointer}
.burger span{width:24px;height:2px;background:var(--brand);border-radius:2px;transition:.2s}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;color:#fff;background:linear-gradient(135deg,var(--brand-deep) 0%,var(--brand) 48%,#0a4585 100%)}
.hero__bg{position:absolute;inset:0;opacity:.55;
  background:
    radial-gradient(900px 420px at 84% -12%, rgba(55,177,244,.55), transparent 62%),
    radial-gradient(720px 380px at 6% 112%, rgba(176,128,80,.35), transparent 60%);
}
.hero__inner{position:relative;display:grid;grid-template-columns:1.35fr .9fr;gap:48px;padding:74px 0 66px;align-items:center}
.hero__eyebrow{margin:0 0 14px;text-transform:uppercase;letter-spacing:.15em;font-size:12.5px;color:var(--cream);font-family:var(--font-head)}
.hero h1{margin:0 0 20px;color:#fff;font-size:clamp(30px,4.4vw,52px)}
.hero__lead{margin:0 0 28px;max-width:58ch;font-size:18px;color:#dde9f7}
.hero__actions{display:flex;gap:14px;flex-wrap:wrap}
.hero__badges{margin-top:26px;display:flex;gap:10px;flex-wrap:wrap}
.hero__badges span{font-size:13px;padding:5px 12px;border:1px solid rgba(255,255,255,.4);border-radius:999px;color:#fff}
.hero__stats{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.stat{background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.18);border-radius:var(--radius);padding:18px 16px;backdrop-filter:blur(4px)}
.stat b{display:block;font-family:var(--font-head);font-size:30px;color:#fff;line-height:1}
.stat b span{font-size:15px;font-weight:400;opacity:.85;margin-left:3px}
.stat>span{display:block;margin-top:7px;font-size:13px;color:#cfe0f5;line-height:1.35}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:10px;font-weight:700;font-size:15.5px;font-family:var(--font-head);transition:.18s;border:1px solid transparent}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn--primary{background:var(--cream);color:var(--brand-deep)}
.btn--primary:hover{box-shadow:0 10px 26px rgba(0,0,0,.25)}
.btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn--ghost:hover{background:rgba(255,255,255,.12)}

/* ---------- Search band ---------- */
.searchband{background:var(--bg-tint);border-bottom:1px solid var(--line);padding:44px 0}
.searchband__title{text-align:center;font-size:23px;margin:0 0 26px}
.searchband__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.searchcard{display:flex;flex-direction:column;gap:6px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:.18s;color:inherit}
.searchcard:hover{border-color:var(--brand);box-shadow:var(--shadow);transform:translateY(-3px);text-decoration:none}
.searchcard__ic{font-size:26px}
.searchcard b{font-family:var(--font-head);font-size:18px;color:var(--ink)}
.searchcard small{color:var(--muted);font-size:14px}
.searchband__row{display:flex;gap:10px 22px;flex-wrap:wrap;justify-content:center;margin-top:26px;font-size:14.5px;font-family:var(--font-head)}
.searchband__row a{color:var(--brand)}

/* ---------- Sections ---------- */
.section{padding:70px 0}
.section--tint{background:var(--bg-tint);border-block:1px solid var(--line)}
.section--dark{background:linear-gradient(160deg,var(--bg-dark),#041730);color:#d7e3f2}
.eyebrow{margin:0 0 8px;text-transform:uppercase;letter-spacing:.17em;font-size:12.5px;color:var(--gold);font-weight:700;font-family:var(--font-head)}
.eyebrow--light{color:var(--cream)}
.h2{margin:0 0 26px;font-size:clamp(26px,3.2vw,38px)}
.h2--light{color:#fff}
.lead{max-width:72ch;margin:-10px 0 30px;font-size:17.5px;color:var(--muted)}
.prose p{margin:0 0 16px;max-width:80ch}
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:36px}
.fact{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.fact b{display:block;font-family:var(--font-head);font-size:26px;color:var(--brand)}
.fact span{font-size:13.5px;color:var(--muted)}

/* ---------- Funds ---------- */
.fundgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.fund{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;transition:.18s}
.fund:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#c3d7f0}
.fund b{display:block;font-family:var(--font-head);font-size:25px;color:var(--brand);line-height:1.1}
.fund b span{font-size:14px;font-weight:400;color:var(--muted)}
.fund>span{display:block;margin-top:6px;font-size:14px;color:var(--muted)}
.fund.big{grid-column:span 2;grid-row:span 2;display:flex;flex-direction:column;justify-content:center;
  background:linear-gradient(140deg,var(--brand),var(--brand-deep));border:0;color:#fff}
.fund.big b{font-size:42px;color:#fff}
.fund.big b span{color:#cfe0f5}
.fund.big>span{color:#dbe8f7;font-size:15px;max-width:34ch;margin-top:12px}
.srcline{margin-top:22px;font-size:13px;color:var(--muted)}

/* ---------- Cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;transition:.18s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#c3d7f0}
.card h3{margin:0 0 10px;font-size:19px}
.card p{margin:0 0 16px;font-size:14.8px;color:var(--muted);flex:1}
.card__link{font-weight:700;font-size:14.5px;font-family:var(--font-head);color:var(--brand)}

/* ---------- Departments ---------- */
.dept-tools{display:flex;align-items:center;gap:16px;margin-bottom:24px;flex-wrap:wrap}
.dept-search{flex:1;min-width:240px;padding:13px 16px;border:1px solid var(--line);border-radius:10px;font-size:15.5px;font-family:inherit;background:#fff;color:var(--text)}
.dept-search:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px #dcebfb}
.dept-count{font-size:14px;color:var(--muted)}
.deptgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.dept{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;border-left:4px solid var(--brand);transition:.16s}
.dept:hover{box-shadow:var(--shadow)}
.dept__head{display:flex;align-items:center;gap:10px;font-family:var(--font-head);font-size:17px;color:var(--brand);font-weight:700;margin-bottom:8px}
.dept__ic{font-size:19px;flex:0 0 auto}
.dept__row{font-size:14.3px;color:var(--muted);display:flex;gap:8px;margin-top:4px}
.dept__row b{color:var(--text);font-weight:400}
.dept__row span:first-child{flex:0 0 auto;opacity:.9}
.dept__row a{color:var(--brand)}
.dept-empty{text-align:center;color:var(--muted);padding:24px}

/* ---------- Сервисы ---------- */
.cols{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.col h3{font-size:18.5px;margin:0 0 14px;padding-bottom:10px;border-bottom:2px solid #dcebfb}
.ticks{list-style:none;margin:0;padding:0}
.ticks li{position:relative;padding:0 0 12px 28px;font-size:15px;color:var(--text)}
.ticks li::before{content:"";position:absolute;left:0;top:7px;width:15px;height:15px;border-radius:50%;
  background:#dcebfb;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M20 6L9 17l-5-5' fill='none' stroke='%2305336E' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size:11px;background-repeat:no-repeat;background-position:center}
.cta{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}
.cta .btn--primary{background:var(--brand);color:#fff}
.cta .btn--primary:hover{background:var(--brand-dark)}
.cta .btn--ghost{color:var(--brand);border-color:var(--brand)}

/* ---------- News ---------- */
.newsgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.newsitem{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;transition:.18s}
.newsitem:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cfd9e6}
.newsitem__tag{align-self:flex-start;font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:#fff;background:var(--link);padding:4px 11px;border-radius:999px;margin-bottom:12px}
.newsitem__tag--blue{background:var(--brand)}
.newsitem__tag--gold{background:var(--gold);color:#3a2c12}
.newsitem h3{margin:0 0 10px;font-size:18px}
.newsitem p{margin:0 0 14px;color:var(--muted);font-size:14.8px;flex:1}
.newsitem__link{font-weight:700;font-size:14.5px}
.newsitem__meta{font-size:13px;color:var(--muted)}

/* ---------- Feedback ---------- */
.feedback{display:grid;grid-template-columns:1.6fr 1fr;gap:28px;align-items:start}
.feedback__form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:grid;gap:16px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:7px;font-size:14.5px;color:var(--text)}
.field span{font-weight:700;color:var(--ink);font-size:14px}
.field input,.field select,.field textarea{font-family:inherit;font-size:15px;padding:11px 13px;border:1px solid var(--line);border-radius:9px;background:#fbfcfe;color:var(--text);resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(5,51,110,.08)}
.feedback__form .btn{justify-self:start}
.feedback__note{margin:0;font-size:12.5px;color:var(--muted)}
.feedback__ok{margin:0;font-weight:700;color:#1f8a4c}
.feedback__aside{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.feedback__aside h3{margin:0 0 16px;font-size:18px}
.feedback__aside p{margin:0 0 14px;font-size:14.8px;color:var(--muted);line-height:1.5}
.feedback__aside b{color:var(--ink)}

/* ---------- Timeline ---------- */
.timeline{list-style:none;margin:8px 0 0;padding:0;position:relative}
.timeline::before{content:"";position:absolute;left:74px;top:8px;bottom:8px;width:2px;background:linear-gradient(var(--brand),var(--bronze))}
.timeline li{position:relative;padding:0 0 30px 110px;min-height:60px}
.timeline li:last-child{padding-bottom:0}
.timeline li>b{position:absolute;left:0;top:0;width:74px;text-align:right;font-family:var(--font-head);font-size:19px;color:var(--brand);padding-right:20px;box-sizing:border-box}
.timeline li::before{content:"";position:absolute;left:68px;top:5px;width:14px;height:14px;border-radius:50%;background:#fff;border:3px solid var(--link)}
.timeline h3{margin:0 0 6px;font-size:18px}
.timeline p{margin:0;color:var(--muted);font-size:15px;max-width:70ch}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:900px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:4px 20px;transition:.18s}
.faq details[open]{box-shadow:var(--shadow);border-color:#cfd9e6}
.faq summary{cursor:pointer;padding:16px 0;font-family:var(--font-head);font-size:17px;color:var(--ink);font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;color:var(--bronze);font-weight:400;transition:.2s;flex:0 0 auto}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{margin:0 0 18px;color:var(--muted);font-size:15px;max-width:78ch}

/* ---------- Contacts ---------- */
.contactgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.contactcard{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);padding:24px}
.contactcard h3{margin:0 0 14px;color:#fff;font-size:18.5px}
.addr{color:#d7e3f2;font-size:15.5px;margin:0 0 14px}
.addr small{color:#9fb6d4}
.addr .light{color:#fff}
.phone a{color:var(--cream);font-size:20px;font-family:var(--font-head)}
.hours{width:100%;border-collapse:collapse;font-size:15px}
.hours td{padding:8px 0;border-bottom:1px solid rgba(255,255,255,.12);color:#d7e3f2}
.hours td:last-child{text-align:right;color:#fff;font-weight:700}
.hours .off{color:#7f9cc0;font-weight:400}
.hours-note{margin:14px 0 0;font-size:13px;color:#9fb6d4}
.links{list-style:none;margin:0;padding:0}
.links li{padding:7px 0;border-bottom:1px solid rgba(255,255,255,.12)}
.links a{color:var(--cream)}
.contactcard a[href^="mailto"]{color:var(--cream)}
.contactcard--wide{grid-column:span 1}

/* ---------- Footer ---------- */
.footer{background:#03152b;color:#8fa6c2;font-size:14px;padding:34px 0}
.footer__inner{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.footer b{color:#d7e3f2}
.footer__note{max-width:52ch;font-size:13px;line-height:1.6}
.footer a{color:var(--cream)}

/* ---------- Mobile ---------- */
@media (max-width:960px){
  .hero__inner{grid-template-columns:1fr;gap:34px;padding:56px 0 52px}
  .hero__stats{max-width:520px}
  .searchband__grid{grid-template-columns:1fr}
  .cards{grid-template-columns:repeat(2,1fr)}
  .facts,.fundgrid{grid-template-columns:repeat(2,1fr)}
  .cols,.contactgrid{grid-template-columns:1fr}
  .newsgrid,.feedback{grid-template-columns:1fr}
}
@media (max-width:720px){
  body{font-size:16px}
  .nav{position:fixed;inset:0 0 auto;top:80px;left:0;right:0;background:#fff;flex-direction:column;gap:0;
       padding:12px 20px 20px;border-bottom:1px solid var(--line);box-shadow:var(--shadow-lg);
       transform:translateY(-130%);transition:.28s;max-height:calc(100vh - 80px);overflow:auto}
  .nav.open{transform:translateY(0)}
  .nav a{padding:14px 12px;border-bottom:1px solid var(--line);border-radius:0}
  .burger{display:flex}
  .topbar .wrap{justify-content:flex-start}
  .hero__stats{grid-template-columns:1fr 1fr}
  .cards,.facts,.fundgrid,.deptgrid,.newsgrid{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}
  .fund.big{grid-column:auto;grid-row:auto}
  .section{padding:52px 0}
}