/* AIVORENCE — styles. Anthropic-inspired warm palette, dark & light themes. */

:root{
  --bg:#faf9f5;
  --bg-2:#f0eee6;
  --bg-3:#e8e6dc;
  --surface:#ffffff;
  --text:#141413;
  --text-2:#5e5d59;
  --text-3:#87867f;
  --border:#e3e1d9;
  --border-2:#d1cfc5;
  --accent:#d97757;
  --accent-hover:#c96442;
  --accent-soft:#f7e8e2;
  --on-accent:#ffffff;
  --ok:#3d8168;
  --shadow:0 1px 2px rgba(20,20,19,.04),0 4px 16px rgba(20,20,19,.06);
  --shadow-lg:0 2px 4px rgba(20,20,19,.05),0 12px 32px rgba(20,20,19,.10);
  --radius:14px;
  --radius-sm:10px;
  --font-sans:"Inter","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --font-serif:"Fraunces",Georgia,"Times New Roman",serif;
  color-scheme:light;
}
[data-theme="dark"]{
  --bg:#1f1e1d;
  --bg-2:#262624;
  --bg-3:#2e2d2a;
  --surface:#262624;
  --text:#f5f4ee;
  --text-2:#b8b6ad;
  --text-3:#8c8a80;
  --border:#3a3937;
  --border-2:#4a4845;
  --accent:#d97757;
  --accent-hover:#e58c6d;
  --accent-soft:#3d2e27;
  --on-accent:#ffffff;
  --ok:#5fa88c;
  --shadow:0 1px 2px rgba(0,0,0,.2),0 4px 16px rgba(0,0,0,.25);
  --shadow-lg:0 2px 4px rgba(0,0,0,.25),0 12px 32px rgba(0,0,0,.35);
  color-scheme:dark;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  transition:background-color .25s ease,color .25s ease;
}
img,svg{display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;padding:0}

h1,h2,h3{font-family:var(--font-serif);font-weight:500;line-height:1.2;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:clamp(2.1rem,5.5vw,3.4rem)}
h2{font-size:clamp(1.5rem,3.4vw,2.1rem)}
h3{font-size:1.2rem}
p{margin:0 0 1em}

.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.ic{width:1.25em;height:1.25em;flex:none}

.skip-link{position:absolute;left:-9999px;top:0;background:var(--accent);color:var(--on-accent);padding:10px 18px;border-radius:0 0 10px 0;z-index:200}
.skip-link:focus{left:0}

/* ---------- Шапка ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:color-mix(in srgb,var(--bg) 85%,transparent);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
}
.header-in{display:flex;align-items:center;gap:12px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-serif);font-size:1.25rem;letter-spacing:.02em}
.brand .ic{width:30px;height:30px;border-radius:8px}
.brand-name{position:relative;display:inline-block;white-space:nowrap}
.brand-name .base{transition:opacity .5s ease}
.brand-name .alt{position:absolute;left:0;top:0;white-space:nowrap;opacity:0;transition:opacity .5s ease}
.brand-name.flip .base{opacity:0}
.brand-name.flip .alt{opacity:1}

.main-nav{display:flex;align-items:center;gap:4px;margin-left:12px}
.main-nav a{padding:8px 13px;border-radius:9px;color:var(--text-2);font-size:.95rem;transition:background .15s,color .15s}
.main-nav a:hover{background:var(--bg-2);color:var(--text)}
.main-nav a[aria-current="page"]{color:var(--text);background:var(--bg-2)}

.header-actions{margin-left:auto;display:flex;align-items:center;gap:8px}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  width:38px;height:38px;border-radius:10px;color:var(--text-2);
  border:1px solid transparent;transition:background .15s,color .15s;
}
.icon-btn:hover{background:var(--bg-2);color:var(--text)}
.theme-toggle .ic-sun{display:none}
.theme-toggle .ic-moon{display:block}
[data-theme="dark"] .theme-toggle .ic-sun{display:block}
[data-theme="dark"] .theme-toggle .ic-moon{display:none}

/* Переключатель языка */
.lang-menu{position:relative}
.lang-btn{width:auto;padding:0 10px;font-size:.9rem}
.lang-btn .ic-chev{width:.95em;height:.95em}
.lang-list{
  position:absolute;right:0;top:calc(100% + 8px);min-width:170px;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);
  box-shadow:var(--shadow-lg);padding:6px;display:none;z-index:110;
}
.lang-menu.open .lang-list{display:block}
.lang-list a{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;border-radius:8px;font-size:.93rem;color:var(--text-2)}
.lang-list a:hover{background:var(--bg-2);color:var(--text)}
.lang-list a.active{color:var(--text);font-weight:600}
.lang-list a.active::after{content:"✓";color:var(--accent)}

/* Кнопки */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 22px;border-radius:999px;font-size:.98rem;font-weight:600;
  border:1px solid transparent;transition:background .15s,border-color .15s,transform .1s;
  white-space:nowrap;
}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--accent);color:var(--on-accent)}
.btn-primary:hover{background:var(--accent-hover)}
.btn-ghost{border-color:var(--border-2);color:var(--text)}
.btn-ghost:hover{background:var(--bg-2)}
.btn-sm{padding:8px 16px;font-size:.9rem}
.btn .ic{width:1.05em;height:1.05em}

/* Мобильное меню */
.nav-toggle{display:none}
@media (max-width:820px){
  .main-nav{
    display:none;position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;
    background:var(--bg);border-bottom:1px solid var(--border);padding:10px 16px 16px;margin:0;gap:2px;
    box-shadow:var(--shadow-lg);
  }
  .main-nav.open{display:flex}
  .main-nav a{padding:12px 14px;font-size:1.02rem}
  .nav-toggle{display:inline-flex}
  .header-cta{display:none}
}

/* ---------- Герой ---------- */
.hero{padding:84px 0 64px;text-align:center;position:relative;overflow:hidden}
.hero-bg{position:absolute;inset:0;pointer-events:none;opacity:.55}
.hero .wrap{position:relative}
.badge{
  display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent);font-size:.9rem;font-weight:600;margin-bottom:22px;
}
.badge .ic{width:1em;height:1em}
.hero h1{max-width:17ch;margin-left:auto;margin-right:auto}
.hero-sub{font-size:1.15rem;color:var(--text-2);max-width:44ch;margin:0 auto 32px}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ---------- Секции ---------- */
.section{padding:64px 0}
.section-head{text-align:center;max-width:56ch;margin:0 auto 40px}
.section-head p{color:var(--text-2);font-size:1.05rem;margin:0}
.section-alt{background:var(--bg-2)}
[data-theme="dark"] .section-alt{background:var(--bg-2)}

.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
@media (max-width:900px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}

.card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);transition:border-color .2s,transform .2s,box-shadow .2s;
}
a.card:hover{border-color:var(--border-2);transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.card h3{margin-bottom:.4em}
.card p{color:var(--text-2);font-size:.95rem;margin:0}
.card-ic{
  width:44px;height:44px;border-radius:12px;background:var(--accent-soft);color:var(--accent);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.card-ic .ic{width:22px;height:22px}
.card-link{display:inline-flex;align-items:center;gap:6px;margin-top:16px;color:var(--accent);font-weight:600;font-size:.92rem}
.card-link .ic{width:1em;height:1em;transition:transform .15s}
a.card:hover .card-link .ic{transform:translateX(3px)}

/* ---------- Карточки моделей ---------- */
.model-card{display:flex;flex-direction:column;gap:14px}
.model-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.model-name{font-family:var(--font-serif);font-size:1.45rem}
.model-tag{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--accent);background:var(--accent-soft);padding:4px 10px;border-radius:999px;white-space:nowrap}
.model-desc{color:var(--text-2);font-size:.95rem;margin:0;flex:1}
.spec-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  display:inline-flex;align-items:center;gap:6px;font-size:.83rem;color:var(--text-2);
  border:1px solid var(--border);border-radius:999px;padding:5px 12px;background:var(--bg);
}
.chip .ic{width:.95em;height:.95em;color:var(--text-3)}
.chip-on{color:var(--ok);border-color:color-mix(in srgb,var(--ok) 35%,var(--border))}
.chip-on .ic{color:var(--ok)}
.chip-off{color:var(--text-3);text-decoration:line-through;text-decoration-thickness:1px}

/* ---------- Страница модели ---------- */
.model-hero{padding:56px 0 40px}
.back-link{display:inline-flex;align-items:center;gap:7px;color:var(--text-2);font-size:.92rem;margin-bottom:26px;transition:color .15s}
.back-link:hover{color:var(--text)}
.back-link .ic{width:1em;height:1em}
.model-hero h1{margin-bottom:.3em}
.model-hero .model-tag{font-size:.85rem}
.model-hero-sub{font-size:1.1rem;color:var(--text-2);max-width:64ch}

.spec-table{width:100%;border-collapse:collapse}
.spec-table th,.spec-table td{padding:14px 4px;border-bottom:1px solid var(--border);text-align:left;font-size:.97rem}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:none}
.spec-table th{font-weight:500;color:var(--text-2);width:46%}
.spec-table td{font-weight:600}
.yes{color:var(--ok);display:inline-flex;align-items:center;gap:6px}
.no{color:var(--text-3);display:inline-flex;align-items:center;gap:6px}
.yes .ic,.no .ic{width:1em;height:1em}

.price-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:6px}
@media (max-width:560px){.price-cards{grid-template-columns:1fr}}
.price-card{border:1px solid var(--border);border-radius:var(--radius-sm);padding:18px;background:var(--bg)}
.price-card .lbl{font-size:.85rem;color:var(--text-2);margin-bottom:4px}
.price-card .val{font-family:var(--font-serif);font-size:1.7rem}
.price-card .per{font-size:.82rem;color:var(--text-3)}
.free-banner{
  display:flex;align-items:center;gap:12px;background:var(--accent-soft);color:var(--accent);
  border-radius:var(--radius-sm);padding:14px 18px;font-weight:600;margin-bottom:14px;font-size:.95rem;
}
.free-banner .ic{width:1.3em;height:1.3em;flex:none}
.price-note{font-size:.88rem;color:var(--text-3);margin-top:12px}

/* ---------- Документы (деловой стиль) ---------- */
.docs-grid{margin-top:8px}
.doc-page{padding:56px 0 72px}
.doc-page .wrap{max-width:820px}
.doc-head{margin-bottom:36px;padding-bottom:24px;border-bottom:1px solid var(--border)}
.doc-head h1{font-size:clamp(1.7rem,4vw,2.4rem)}
.doc-updated{color:var(--text-3);font-size:.9rem}
.doc-body{font-size:.98rem}
.doc-body h2{font-size:1.3rem;margin:2em 0 .7em;font-family:var(--font-sans);font-weight:700;letter-spacing:0}
.doc-body h3{font-size:1.05rem;margin:1.6em 0 .5em;font-family:var(--font-sans);font-weight:700}
.doc-body p,.doc-body li{color:var(--text-2);line-height:1.75}
.doc-body strong{color:var(--text)}
.doc-body ul,.doc-body ol{padding-left:1.4em;margin:0 0 1em}
.doc-body li{margin-bottom:.4em}
.doc-body a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}
.doc-foot{margin-top:44px;padding-top:24px;border-top:1px solid var(--border)}

/* ---------- Контакты ---------- */
.contact-description{max-width:72ch;margin:-8px 0 28px;color:var(--text-2);line-height:1.75}
.contact-list{display:flex;flex-direction:column;gap:0;margin-top:4px}
.contact-row{display:flex;gap:16px;align-items:flex-start;padding:18px 0;border-bottom:1px solid var(--border)}
.contact-row:last-child{border-bottom:none}
.contact-row .card-ic{margin:0;width:40px;height:40px;flex:none}
.contact-row .lbl{font-size:.85rem;color:var(--text-3)}
.contact-row .val{font-weight:600}
.contact-row a.val{color:var(--accent)}

/* ---------- CTA-блок ---------- */
.cta-block{
  background:var(--text);color:var(--bg);border-radius:20px;padding:56px 32px;text-align:center;
}
[data-theme="dark"] .cta-block{background:var(--bg-3);color:var(--text)}
.cta-block h2{margin-bottom:.4em}
.cta-block p{opacity:.75;max-width:46ch;margin:0 auto 28px}

/* ---------- Подвал ---------- */
.site-footer{border-top:1px solid var(--border);padding:52px 0 32px;margin-top:24px;background:var(--bg-2)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;margin-bottom:36px}
@media (max-width:560px){.footer-grid{grid-template-columns:1fr}}
.footer-brand{display:flex;align-items:center;gap:10px;font-family:var(--font-serif);font-size:1.15rem;margin-bottom:12px}
.footer-brand .ic{width:26px;height:26px;border-radius:7px}
.footer-note{font-size:.86rem;color:var(--text-3);max-width:38ch}
.footer-col h4{font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-3);margin:0 0 14px;font-weight:700}
.footer-col a{display:block;padding:5px 0;color:var(--text-2);font-size:.93rem;transition:color .15s}
.footer-col a:hover{color:var(--text)}
.footer-bottom{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;border-top:1px solid var(--border);padding-top:24px;font-size:.85rem;color:var(--text-3)}

/* 404 */
.nf{padding:110px 0;text-align:center}
.nf h1{font-size:clamp(2.4rem,7vw,4rem)}
.nf p{color:var(--text-2);margin-bottom:30px}

/* Анимация появления */
@media (prefers-reduced-motion:no-preference){
  .reveal{opacity:0;transform:translateY(14px);transition:opacity .55s ease,transform .55s ease}
  .reveal.in{opacity:1;transform:none}
}

::selection{background:var(--accent);color:var(--on-accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}