/* allgdz-online.ru — reshak.ru-style + MAX */
:root{
  --bg:#F4F7FB;--paper:#FFF;--paper-2:#EEF3FA;--line:#DEE5EE;--line-strong:#C6D0DD;
  --text:#13243A;--text-soft:#3F5168;--text-dim:#7C8696;--muted:#A9B2BF;
  --blue:#2A5CAA;--blue-2:#3F7BD2;--blue-dark:#1B3F7A;--accent:#E08F2F;
  --max-blue:#0077FF;--max-blue-dark:#005FCC;
  --ok:#2F7C3A;--warn:#C77A2C;--err:#B7493D;
  --radius:16px;--radius-sm:10px;--radius-pill:999px;
  --shadow:0 14px 38px rgba(20,44,80,.10);--shadow-soft:0 4px 14px rgba(20,44,80,.06);
  --maxw:1180px;
  --serif:Georgia,"Times New Roman",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}html,body{margin:0;padding:0}
html{scroll-behavior:smooth;background:var(--bg)}
body{font-family:var(--sans);font-size:16px;line-height:1.65;color:var(--text);background:var(--bg);min-height:100vh}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}a:hover{color:var(--blue-dark);text-decoration:underline;text-underline-offset:3px}
.muted{color:var(--text-dim)}.small{font-size:13px}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;color:var(--text)}
h1{font-size:clamp(32px,4.5vw,46px);line-height:1.15;margin:0 0 16px}
h2{font-size:clamp(24px,3vw,32px);line-height:1.22;margin:0 0 14px}
h3{font-size:20px;margin:0 0 8px}
h4{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--text-soft);margin:0 0 12px;font-family:var(--sans);font-weight:600}
p{margin:0 0 10px}ul,ol{margin:0;padding:0;list-style:none}
.wrap{max-width:var(--maxw);padding:0 22px;margin:0 auto}
.skip{position:absolute;left:-9999px}.skip:focus{position:static;background:var(--blue);color:#fff;padding:8px 14px;font-weight:600}

/* HEADER */
.hdr{position:sticky;top:0;z-index:30;background:rgba(244,247,251,.94);backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--line)}
.hdr-row{display:flex;align-items:center;gap:16px;padding:12px 0;flex-wrap:wrap}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:600;text-decoration:none}.logo:hover{text-decoration:none}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:9px;background:linear-gradient(135deg,var(--blue) 0%,var(--blue-2) 100%);color:#fff;box-shadow:0 4px 12px rgba(42,92,170,.28)}
.logo-mark svg{color:#fff}
.logo-txt{font-family:var(--serif);font-size:22px;font-weight:600}
.nav{display:flex;gap:18px;margin-left:14px;flex:1;flex-wrap:wrap}
.nav a{color:var(--text-soft);font-size:14.5px;font-weight:500}
.nav a:hover{color:var(--blue-dark);text-decoration:none}
.hdr-actions{display:flex;gap:10px;flex-shrink:0;align-items:center}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:var(--radius-pill);font:inherit;font-weight:600;border:1px solid transparent;cursor:pointer;text-decoration:none;transition:all .18s ease;white-space:nowrap;line-height:1}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-sm{padding:9px 16px;font-size:14px}.btn-lg{padding:14px 26px;font-size:15.5px}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 6px 18px rgba(42,92,170,.26)}
.btn-primary:hover{background:var(--blue-dark);color:#fff}
.btn-outline{border-color:var(--line-strong);color:var(--text);background:transparent}
.btn-outline:hover{border-color:var(--blue);color:var(--blue)}
.btn-ghost{background:transparent;color:var(--text-soft)}.btn-ghost:hover{color:var(--blue-dark)}

/* MAX button */
.btn-max{background:var(--max-blue);color:#fff;box-shadow:0 6px 18px rgba(0,119,255,.30);font-weight:600}
.btn-max:hover{background:var(--max-blue-dark);color:#fff;box-shadow:0 8px 22px rgba(0,119,255,.40)}
.btn-max .max-ico{width:18px;height:18px;display:inline-flex;align-items:center;justify-content:center;background:#fff;color:var(--max-blue);border-radius:5px;font-weight:700;font-size:12px;line-height:1;font-family:var(--sans)}
.btn-max-lg{padding:14px 28px;font-size:16px}
.btn-max-lg .max-ico{width:22px;height:22px;font-size:13px;border-radius:6px}

/* HERO */
.hero{padding:54px 0 36px;background:linear-gradient(180deg,#fff 0%,var(--bg) 100%);border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:42px;align-items:center}
.hero-tag{display:inline-block;padding:6px 14px;border-radius:var(--radius-pill);background:rgba(63,123,210,.13);border:1px solid rgba(42,92,170,.20);color:var(--blue-dark);font-size:13px;font-weight:600;margin-bottom:18px}
.lead{font-size:18px;line-height:1.65;color:var(--text-soft);max-width:560px;margin:0 0 22px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:18px;align-items:center}
.hero-cta-note{font-size:13.5px;color:var(--text-dim);margin:6px 0 0;display:flex;align-items:center;gap:6px}
.hero-marks{display:grid;grid-template-columns:1fr 1fr;gap:10px 28px;color:var(--text-soft);font-size:14px;margin-top:18px}
.hero-marks li{display:inline-flex;align-items:center;gap:8px}
.hero-marks span.tk{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%;background:var(--blue);color:#fff;font-size:13px;font-weight:700;flex-shrink:0}
.hero-art{display:flex;align-items:center;justify-content:center;min-height:340px}

/* SEARCH BAR */
.search-bar{background:var(--paper);border:1px solid var(--line-strong);border-radius:var(--radius-pill);padding:8px 8px 8px 22px;display:flex;align-items:center;gap:10px;box-shadow:var(--shadow-soft);max-width:560px}
.search-bar input{flex:1;border:0;outline:0;font:inherit;font-size:15.5px;color:var(--text);padding:8px 0;background:transparent}
.search-bar input::placeholder{color:var(--text-dim)}
.search-bar button{flex-shrink:0}

/* STATS BAND */
.stats-band{background:var(--blue-dark);color:#fff;padding:32px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat{text-align:center}
.stat b{display:block;font-family:var(--serif);font-size:38px;line-height:1.1;font-weight:600;color:#fff}
.stat span{display:block;color:rgba(255,255,255,.78);font-size:14px;margin-top:4px}

/* SECTION */
.section{padding:56px 0}
.section-title{max-width:780px;margin:0 0 32px}
.section-title .kicker{display:inline-block;color:var(--blue-dark);font-size:12px;letter-spacing:.16em;text-transform:uppercase;margin-bottom:10px;font-weight:700}
.section-title h2{margin:0 0 12px}
.section-title p{color:var(--text-soft);font-size:16.5px;max-width:640px}

/* CARDS */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-soft);transition:transform .2s,border-color .2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-2px);border-color:var(--blue-2)}
.card-icon{width:44px;height:44px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;background:rgba(63,123,210,.14);color:var(--blue-dark);margin-bottom:12px}
.card h3{font-size:18px;margin:6px 0 8px}
.card p{color:var(--text-soft);font-size:14.5px;line-height:1.6;margin:0 0 12px;flex:1}
.card a.more{font-weight:600;font-size:14px;align-self:flex-start}

/* SUBJECTS GRID */
.subjects{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.subject{display:block;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px 18px;color:var(--text);font-weight:600;text-align:left;transition:transform .15s,border-color .15s,color .15s,box-shadow .15s;text-decoration:none}
.subject:hover{transform:translateY(-2px);border-color:var(--blue-2);color:var(--blue-dark);text-decoration:none;box-shadow:var(--shadow-soft)}
.subject .sub-grade{display:block;font-size:12.5px;color:var(--text-dim);font-weight:500;margin-top:2px}
.subject .sub-meta{display:block;font-size:11.5px;color:var(--blue);font-weight:600;margin-top:6px}

/* TEXTBOOKS */
.textbooks{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.tbook{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-sm);padding:18px 20px;display:flex;gap:14px;align-items:flex-start;transition:transform .15s,border-color .15s;text-decoration:none;color:var(--text)}
.tbook:hover{transform:translateY(-2px);border-color:var(--blue-2);text-decoration:none}
.tbook-cover{width:48px;height:62px;border-radius:4px;flex-shrink:0;background:linear-gradient(135deg,var(--blue) 0%,var(--blue-2) 100%);color:#fff;display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-weight:600;font-size:18px}
.tbook-body{flex:1;min-width:0}
.tbook h4{font-family:var(--serif);font-size:15.5px;margin:0 0 4px;color:var(--text);text-transform:none;letter-spacing:0}
.tbook .tbook-meta{font-size:13px;color:var(--text-dim);margin-bottom:6px}
.tbook .tbook-stat{font-size:12.5px;color:var(--blue);font-weight:600}

/* TASKS */
.task{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-sm);padding:18px 22px;margin-bottom:14px}
.task-q{font-weight:600;color:var(--text);margin-bottom:8px}
.task-q::before{content:"Задание: ";color:var(--blue-dark);font-weight:600}
.task-a{margin-bottom:8px;color:var(--text)}
.task-a::before{content:"Ответ: ";color:var(--ok);font-weight:600}
.task-expl{color:var(--text-soft);font-size:14.5px;line-height:1.65;border-left:3px solid var(--blue-2);padding:6px 14px;margin-top:8px;background:var(--paper-2);border-radius:0 var(--radius-sm) var(--radius-sm) 0}
.task-expl::before{content:"Решение: ";color:var(--blue-dark);font-weight:600}

/* MAX-LOCK BANNER */
.max-lock{background:linear-gradient(135deg,#0077FF 0%,#005FCC 100%);color:#fff;border-radius:var(--radius);padding:30px 32px;display:grid;grid-template-columns:64px 1fr auto;gap:22px;align-items:center;box-shadow:0 12px 30px rgba(0,119,255,.30);margin:30px 0}
.max-lock-icon{width:64px;height:64px;border-radius:14px;background:#fff;color:var(--max-blue);display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:24px;font-family:var(--sans)}
.max-lock h3{color:#fff;font-size:22px;margin:0 0 6px;font-family:var(--serif)}
.max-lock p{color:rgba(255,255,255,.92);font-size:15px;margin:0}
.max-lock .btn-max{background:#fff;color:var(--max-blue)}
.max-lock .btn-max:hover{background:var(--paper-2);color:var(--max-blue-dark)}
.max-lock .btn-max .max-ico{background:var(--max-blue);color:#fff}

/* REVIEWS */
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.review{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-soft)}
.review-stars{color:var(--accent);font-size:14px;margin-bottom:8px}
.review-text{color:var(--text);font-size:15px;line-height:1.65;margin:0 0 14px;font-style:italic}
.review-author{font-size:13.5px;color:var(--text-dim);font-weight:600}

/* FAQ */
.faq{display:grid;gap:10px;max-width:840px}
.faq details{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;box-shadow:var(--shadow-soft)}
.faq summary{list-style:none;cursor:pointer;padding:16px 22px;font-weight:600;font-size:15.5px;color:var(--text);display:flex;align-items:center;justify-content:space-between;gap:10px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--blue);font-size:22px;line-height:1;font-weight:300;transition:transform .2s;flex-shrink:0}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 22px 18px;color:var(--text-soft);font-size:14.5px;margin:0;line-height:1.65}

/* DISCLAIMER */
.disclaimer{background:rgba(199,122,44,.08);border:1px solid rgba(199,122,44,.22);border-radius:var(--radius-sm);padding:16px 20px;color:var(--text-soft);font-size:14px;line-height:1.6;margin-top:30px}
.disclaimer b{color:var(--warn)}

/* CTA STRIP */
.cta-strip{display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center;background:linear-gradient(135deg,var(--blue-dark) 0%,var(--blue) 100%);border-radius:24px;padding:34px 38px;color:#fff;box-shadow:var(--shadow)}
.cta-strip h2{margin:0 0 6px;color:#fff;font-size:26px}
.cta-strip p{margin:0;color:rgba(255,255,255,.92);font-size:15.5px}

/* FOOTER */
.ftr{background:var(--paper);border-top:1px solid var(--line);padding:42px 0 28px;margin-top:30px}
.ftr-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px;margin-bottom:24px}
.ftr h4{color:var(--text);margin-bottom:12px}
.ftr ul{display:grid;gap:7px}.ftr ul a{color:var(--text-soft);font-size:14px}
.ftr ul a:hover{color:var(--blue-dark)}
.ftr-bottom{border-top:1px solid var(--line);padding-top:18px;display:flex;justify-content:space-between;gap:16px;color:var(--text-dim);font-size:13px;flex-wrap:wrap}

/* COOKIE */
.cookie-banner{position:fixed;left:18px;right:18px;bottom:18px;z-index:50;background:var(--paper);border:1px solid var(--line-strong);border-radius:14px;padding:14px 18px;box-shadow:var(--shadow)}
.cookie-row{display:flex;align-items:center;gap:18px;justify-content:space-between;flex-wrap:wrap}
.cookie-row p{margin:0;color:var(--text-soft);font-size:14px;flex:1;min-width:240px}

/* DOCS */
.doc{max-width:780px;margin:50px auto;padding:0 22px}
.doc h1{font-size:32px;margin:0 0 12px}
.doc h2{font-size:22px;margin:24px 0 10px}
.doc p,.doc li{color:var(--text-soft);font-size:15.5px;line-height:1.75}
.doc ul{margin:8px 0 14px 0}
.doc li{position:relative;padding-left:20px;margin-bottom:6px}
.doc li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;background:var(--blue-2)}
.doc-meta{color:var(--text-dim);font-size:14px;margin-bottom:22px;font-style:italic}

/* ARTICLE */
.article{max-width:840px;margin:40px auto;padding:0 22px}
.article-meta{color:var(--text-dim);font-size:14px;margin-bottom:18px}
.article h1{font-size:34px;margin:0 0 14px;line-height:1.2}
.article p,.article li{color:var(--text);font-size:16px;line-height:1.75}
.article h2{font-size:24px;margin:30px 0 12px}
.article h3{font-size:18px;margin:22px 0 10px;font-family:var(--sans);color:var(--blue-dark);font-weight:600}
.article ul{list-style:disc;padding-left:22px;margin:8px 0 14px 0}
.article ul li{padding-left:0;margin-bottom:6px}
.article ul li::before{display:none}
.article ol{list-style:decimal;padding-left:22px;margin:8px 0 14px 0}
.article ol li{padding-left:0;margin-bottom:6px}
.article ol li::before{display:none}
.article blockquote{border-left:3px solid var(--blue-2);padding:6px 18px;margin:18px 0;color:var(--text-soft);font-style:italic;background:var(--paper-2);border-radius:0 var(--radius-sm) var(--radius-sm) 0}

.crumbs{font-size:13.5px;color:var(--text-dim);margin-bottom:14px}
.crumbs a{color:var(--text-soft)}

/* AUTH MODAL */
.auth-modal{position:fixed;inset:0;z-index:60;background:rgba(19,36,58,.55);display:flex;align-items:center;justify-content:center;padding:20px;backdrop-filter:blur(4px)}
.auth-modal[hidden]{display:none}
.auth-box{background:var(--paper);border-radius:18px;padding:34px 32px;max-width:440px;width:100%;box-shadow:var(--shadow);text-align:center}
.auth-box h2{font-size:22px;margin:0 0 10px;font-family:var(--serif)}
.auth-box p{color:var(--text-soft);font-size:14.5px;margin:0 0 20px;line-height:1.6}
.auth-box .auth-features{text-align:left;background:var(--paper-2);border-radius:10px;padding:14px 18px;margin:0 0 22px}
.auth-box .auth-features li{font-size:13.5px;color:var(--text-soft);padding:5px 0 5px 24px;position:relative}
.auth-box .auth-features li::before{content:"✓";position:absolute;left:4px;top:5px;color:var(--ok);font-weight:700}
.auth-box .btn-max{width:100%;justify-content:center;padding:13px 22px}
.auth-box-close{display:block;margin:14px auto 0;background:none;border:0;color:var(--text-dim);font:inherit;font-size:13.5px;cursor:pointer}
.auth-box-close:hover{color:var(--text-soft)}
.auth-box-secure{display:flex;align-items:center;justify-content:center;gap:6px;font-size:12px;color:var(--text-dim);margin-top:14px}

/* RESPONSIVE */
@media (max-width:1080px){.subjects{grid-template-columns:repeat(3,1fr)}.textbooks{grid-template-columns:repeat(2,1fr)}}
@media (max-width:980px){.nav{display:none}.hero-grid{grid-template-columns:1fr;gap:32px}.cards,.reviews{grid-template-columns:1fr 1fr}.subjects{grid-template-columns:1fr 1fr}.stats-grid{grid-template-columns:1fr 1fr}.ftr-grid{grid-template-columns:1fr 1fr}.ftr-bottom{flex-direction:column;align-items:flex-start}.cta-strip{grid-template-columns:1fr;text-align:left;padding:26px 24px}.max-lock{grid-template-columns:1fr;text-align:left}}
@media (max-width:560px){.cards,.reviews{grid-template-columns:1fr}.textbooks{grid-template-columns:1fr}.subjects{grid-template-columns:1fr 1fr}.ftr-grid{grid-template-columns:1fr}.stats-grid{grid-template-columns:1fr 1fr}.stat b{font-size:30px}}