@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&family=Lato:wght@300;400;700&display=swap');

/* Палитра снята с тёмной темы приложения: индиго корпуса иконки,
   сиреневый акцент кнопки беседы и голубая подсветка подсказок. */
:root {
  --bg:           #0b1046;
  --bg-card:      #191e70;
  --bg-section:   #080c33;
  --border:       #2e3599;
  --border-lilac: #4a3fb0;
  --accent:       #5b4be0;
  --accent-light: #a78bfa;
  --accent-dim:   #3d3499;
  --cyan:         #63d0fa;
  --green:        #b6ec65;
  --rose:         #e83c65;
  --text:         #ecf9fb;
  --text-sub:     #b6c2ee;
  --text-hint:    #7d8ac9;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Lato', 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}

/* ── ТИПОГРАФИКА ──────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: 'Playfair Display', Georgia, serif;
  color: var(--accent-light);
  line-height: 1.25;
}
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3 { font-size: 1.25rem; }
p  { color: var(--text-sub); margin-bottom: 1rem; }
a  { color: var(--accent-light); text-decoration: none; }
a:hover { color: var(--cyan); }

/* ── ШАПКА ────────────────────────────────────────────────── */
nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(11,16,70,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 clamp(1rem, 5vw, 3rem);
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.nav-brand img { width: 36px; height: 36px; border-radius: 10px; }
.nav-brand-text { font-family: 'Playfair Display', serif; font-size: 1.25rem; color: var(--accent-light); letter-spacing: 1.5px; }
.nav-brand-sub  { font-size: 0.6rem; letter-spacing: 4px; color: var(--text-hint); display: block; margin-top: -4px; }
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a { font-size: 0.85rem; letter-spacing: 1px; color: var(--text-sub); text-transform: uppercase; }
.nav-links a:hover { color: var(--accent-light); }
.nav-cta {
  background: var(--accent); color: #fff !important;
  padding: 8px 18px; border-radius: 20px; font-size: 0.8rem !important;
  letter-spacing: 1px; text-transform: uppercase; transition: background 0.2s;
}
.nav-cta:hover { background: var(--accent-light) !important; color: #0b1046 !important; }

/* ── ПЕРЕКЛЮЧАТЕЛЬ ЯЗЫКА ──────────────────────────────────── */
.lang-switch { position: relative; flex-shrink: 0; }
.lang-toggle {
  display: flex; align-items: center; gap: 6px;
  background: transparent; border: 1px solid var(--border); color: var(--text-sub);
  border-radius: 8px; padding: 6px 12px; font-size: 0.75rem; font-weight: 700;
  letter-spacing: 1px; cursor: pointer; font-family: 'Lato', sans-serif; transition: all 0.15s;
}
.lang-toggle:hover { color: var(--accent-light); border-color: var(--border-lilac); }
.lang-caret { font-size: 0.6rem; transition: transform 0.2s; }
.lang-switch.open .lang-caret { transform: rotate(180deg); }
.lang-menu {
  position: absolute; top: calc(100% + 6px); right: 0; z-index: 200;
  display: none; flex-direction: column; gap: 2px;
  background: rgba(25,30,112,0.98); border: 1px solid var(--border);
  border-radius: 10px; padding: 6px; min-width: 160px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.55);
}
.lang-switch.open .lang-menu { display: flex; }
.lang-menu button {
  background: transparent; border: none; color: var(--text-sub);
  border-radius: 6px; padding: 8px 12px; font-size: 0.85rem; font-weight: 600;
  text-align: left; cursor: pointer; font-family: 'Lato', sans-serif; transition: all 0.15s; white-space: nowrap;
}
.lang-menu button:hover { background: rgba(167,139,250,0.14); color: var(--accent-light); }
.lang-menu button.active { background: var(--accent); color: #fff; }

/* ── ОРНАМЕНТ ─────────────────────────────────────────────── */
.ornament { color: var(--accent-dim); letter-spacing: 6px; font-size: 0.75rem; text-align: center; margin: 0.5rem 0; }

/* ── БАННЕР ───────────────────────────────────────────────── */
.hero-banner { display: block; width: 100%; height: auto; margin: 0; border: none; }

/* ── ГЕРОЙ ────────────────────────────────────────────────── */
.hero { position: relative; overflow: hidden; min-height: 52vh; display: flex; align-items: center; justify-content: center; }
.hero-bg {
  position: absolute; inset: 0;
  background-image: url('hero.png');
  background-size: cover; background-position: center 20%;
  /* Портрет вертикальный: в широкой полосе он режется до крупного плана, поэтому
     идёт размытым фоном, а сам снимок стоит рядом с подписью целиком. */
  filter: blur(22px) brightness(0.4) saturate(0.85);
  transform: scale(1.12);
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom,
    rgba(11,16,70,0.25) 0%,
    rgba(11,16,70,0.35) 38%,
    rgba(11,16,70,0.88) 68%,
    rgba(11,16,70,0.99) 100%);
}
.hero-content {
  position: relative; z-index: 1;
  padding: 3rem clamp(1rem, 5vw, 3rem); max-width: 820px;
}
/* Портрета в герое нет: он уже занимает баннер над ним. */
.hero-text { text-align: center; max-width: 100%; }
.hero-name {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2.4rem, 6vw, 4rem);
  color: var(--text);
  letter-spacing: 2px; line-height: 1.1; margin-bottom: 0.5rem;
  text-shadow: 0 0 40px rgba(91,75,224,0.6);
}
.hero-tagline {
  font-family: 'Playfair Display', serif; font-style: italic;
  font-size: clamp(0.95rem, 2.5vw, 1.3rem); color: var(--text-sub);
  letter-spacing: 3px; text-transform: uppercase; margin-bottom: 0.5rem;
}
.hero-brand { font-size: 0.7rem; letter-spacing: 6px; color: var(--text-hint); text-transform: uppercase; margin-bottom: 1rem; }
.hero-version {
  display: inline-block; background: rgba(167,139,250,0.16);
  border: 1px solid rgba(167,139,250,0.45); border-radius: 20px;
  padding: 0.25rem 0.9rem; font-size: 0.78rem; letter-spacing: 1.5px; color: var(--accent-light);
}
.hero-btns { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-top: 2rem; }

/* ── КНОПКИ ───────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 28px; border-radius: 50px;
  font-size: 0.9rem; font-weight: 700; letter-spacing: 1px;
  text-transform: uppercase; transition: all 0.2s; cursor: pointer; text-decoration: none;
}
.btn-accent {
  background: linear-gradient(135deg, #5b4be0, #a78bfa, #4331c4);
  color: #0b1046;
  box-shadow: 0 4px 20px rgba(91,75,224,0.45);
}
.btn-accent:hover { box-shadow: 0 6px 30px rgba(167,139,250,0.6); transform: translateY(-2px); color: #0b1046; }
.btn-outline { border: 1.5px solid var(--border-lilac); color: var(--accent-light); background: rgba(167,139,250,0.07); }
.btn-outline:hover { background: rgba(167,139,250,0.16); color: var(--cyan); }
.btn-store { background: rgba(25,30,112,0.85); border: 1.5px solid var(--border-lilac); color: var(--text); position: relative; min-width: 220px; justify-content: center; }
.btn-store:hover { background: rgba(167,139,250,0.14); }
.btn-store .store-logo { width: 26px; height: 26px; flex-shrink: 0; color: var(--accent-light); }
.btn-store .store-label { display: flex; flex-direction: column; text-align: left; }
.btn-store .store-sub  { font-size: 0.65rem; font-weight: 300; letter-spacing: 1px; color: var(--text-sub); text-transform: none; }
.btn-store .store-name { font-size: 1rem; font-weight: 700; color: var(--text); letter-spacing: 0.5px; text-transform: none; }
.btn-store-soon { cursor: default; opacity: 0.6; }
.btn-store-soon:hover { background: rgba(25,30,112,0.85); }
.btn-store-soon .store-soon-badge {
  position: absolute; top: -8px; right: -8px;
  background: linear-gradient(135deg, #5b4be0, #a78bfa); color: #0b1046;
  font-size: 0.6rem; font-weight: 700; letter-spacing: 0.5px; text-transform: uppercase;
  padding: 2px 8px; border-radius: 10px; box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

/* ── СЕКЦИИ ───────────────────────────────────────────────── */
section { padding: clamp(3rem, 8vw, 6rem) clamp(1rem, 5vw, 3rem); }
.container { max-width: 1100px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 3rem; }
.section-header p { max-width: 640px; margin: 0.75rem auto 0; }

/* ── КАРТОЧКИ ВОЗМОЖНОСТЕЙ ────────────────────────────────── */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.feature-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 1.75rem; transition: border-color 0.2s, transform 0.2s; }
.feature-card:hover { border-color: var(--border-lilac); transform: translateY(-3px); }
.feature-icon { font-size: 2rem; margin-bottom: 1rem; }
.feature-card h3 { color: var(--accent-light); margin-bottom: 0.5rem; }
.feature-card p { margin: 0; font-size: 0.9rem; }

/* ── ШАГИ БЕСЕДЫ ──────────────────────────────────────────── */
.modes-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.2rem; }
.mode-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 1.5rem 1.25rem; text-align: center; transition: border-color 0.2s, transform 0.2s; }
.mode-card:hover { border-color: var(--border-lilac); transform: translateY(-3px); }
.mode-num {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  display: flex; align-items: center; justify-content: center;
  font-size: 0.95rem; font-weight: 700; color: #0b1046; margin: 0 auto 1rem;
}
.mode-card h3 { font-size: 1rem; margin-bottom: 0.4rem; color: var(--accent-light); }
.mode-card p { font-size: 0.85rem; margin: 0; }

/* ── ЛЕНТА ТЕМ И ЯЗЫКОВ ───────────────────────────────────── */
.topics-wrap { display: flex; flex-wrap: wrap; gap: 0.6rem; justify-content: center; }
.topic-tag { background: rgba(167,139,250,0.09); border: 1px solid rgba(167,139,250,0.28); border-radius: 20px; padding: 0.35rem 1rem; font-size: 0.82rem; color: var(--accent-light); letter-spacing: 0.5px; }

/* ── РАЗБОР ОШИБКИ ────────────────────────────────────────── */
.bubble-demo { display: flex; flex-direction: column; gap: 0.75rem; max-width: 520px; margin: 0 auto; }
.bubble-user {
  align-self: flex-end; background: var(--accent); color: var(--text);
  border-radius: 18px 18px 6px 18px; padding: 0.75rem 1rem; font-size: 0.95rem; max-width: 90%;
}
.bubble-fix {
  background: rgba(19,26,91,0.9); border: 1px solid var(--green);
  border-radius: 14px; padding: 0.9rem 1rem; font-size: 0.9rem; color: var(--text-sub);
}
.bubble-fix s { color: var(--text-hint); }
.bubble-fix .fixed { color: var(--green); font-weight: 700; }
.bubble-tutor {
  align-self: flex-start; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 18px 18px 18px 6px; padding: 0.75rem 1rem; font-size: 0.95rem; max-width: 90%;
}

/* ── ПОКАЗ ────────────────────────────────────────────────── */
.showcase { display: flex; align-items: center; gap: 2.5rem; flex-wrap: wrap; justify-content: center; }
.showcase img { width: min(300px, 70vw); border-radius: 18px; border: 1px solid var(--border-lilac); box-shadow: 0 10px 50px rgba(0,0,0,0.5); }
.showcase-text { flex: 1; min-width: 260px; max-width: 460px; }

/* ── РУКОВОДСТВО ──────────────────────────────────────────── */
.manual-grid { display: grid; grid-template-columns: 240px 1fr; gap: 2rem; align-items: start; }
.manual-toc { position: sticky; top: 80px; background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 1.25rem; }
.manual-toc h4 { font-size: 0.75rem; letter-spacing: 3px; text-transform: uppercase; color: var(--text-hint); margin-bottom: 1rem; }
.manual-toc ul { list-style: none; }
.manual-toc li + li { margin-top: 0.5rem; }
.manual-toc a { font-size: 0.85rem; color: var(--text-sub); transition: color 0.15s; }
.manual-toc a:hover { color: var(--accent-light); }
.manual-block { margin-bottom: 2.5rem; }
.manual-block h3 { display: flex; align-items: center; gap: 10px; margin-bottom: 1rem; font-size: 1.1rem; }
.manual-block h3 .step-num { width: 28px; height: 28px; background: var(--accent); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.75rem; font-family: 'Lato', sans-serif; color: #fff; font-weight: 700; flex-shrink: 0; }
.tip-box { background: rgba(99,208,250,0.08); border-left: 3px solid var(--cyan); border-radius: 0 8px 8px 0; padding: 1rem 1.25rem; margin: 1rem 0; }
.tip-box p { margin: 0; font-size: 0.9rem; }
.tip-box strong { color: var(--cyan); }

/* ── ЮРИДИЧЕСКОЕ ──────────────────────────────────────────── */
.legal-content { max-width: 760px; margin: 0 auto; }
.legal-content h3 { color: var(--cyan); font-size: 1rem; margin: 1.75rem 0 0.5rem; font-family: 'Lato', sans-serif; letter-spacing: 1px; text-transform: uppercase; }
.legal-content p { font-size: 0.9rem; margin-bottom: 0.75rem; }
.legal-content ul { margin: 0.5rem 0 0.75rem 1.5rem; }
.legal-content li { font-size: 0.9rem; color: var(--text-sub); margin-bottom: 0.4rem; }
.legal-date { font-size: 0.8rem; color: var(--text-hint); margin-bottom: 2rem; }

/* ── ВКЛАДКИ ──────────────────────────────────────────────── */
.tabs { display: flex; gap: 4px; margin-bottom: 2rem; background: var(--bg-card); border-radius: 12px; padding: 4px; flex-wrap: wrap; }
.tab-btn { flex: 1; min-width: 120px; padding: 10px 16px; border: none; cursor: pointer; border-radius: 9px; font-family: 'Lato', sans-serif; font-size: 0.85rem; font-weight: 600; background: transparent; color: var(--text-sub); transition: all 0.2s; letter-spacing: 0.5px; }
.tab-btn.active { background: var(--accent); color: #fff; }
.tab-btn:hover:not(.active) { background: rgba(167,139,250,0.12); color: var(--accent-light); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ── ПОДВАЛ ───────────────────────────────────────────────── */
footer { background: var(--bg-card); border-top: 1px solid var(--border); padding: clamp(2rem, 5vw, 3rem) clamp(1rem, 5vw, 3rem); }
.footer-inner { max-width: 1100px; margin: 0 auto; }
.footer-top { display: grid; grid-template-columns: 1fr auto; gap: 2rem; align-items: start; margin-bottom: 2rem; }
.footer-brand img { width: 48px; height: 48px; border-radius: 12px; border: 1px solid var(--border-lilac); margin-bottom: 0.75rem; }
.footer-brand h3 { font-family: 'Playfair Display', serif; font-size: 1.3rem; letter-spacing: 1.5px; margin-bottom: 0.25rem; }
.footer-brand p { font-size: 0.8rem; margin: 0; }
.footer-links { display: flex; flex-direction: column; gap: 0.5rem; text-align: right; }
.footer-links a { font-size: 0.85rem; color: var(--text-sub); }
.footer-links a:hover { color: var(--accent-light); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 1.5rem; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.footer-copy { font-size: 0.8rem; color: var(--text-hint); }

/* ── ВЫДЕЛЕНИЯ ────────────────────────────────────────────── */
.highlight { color: var(--accent-light); font-weight: 700; }
kbd { background: var(--bg); border: 1px solid var(--border-lilac); border-radius: 4px; padding: 2px 8px; font-size: 0.8rem; color: var(--accent-light); font-family: monospace; }

/* ── АДАПТИВ ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  /* Разрядка в строке языков на узком экране уводила её за край. */
  .hero-brand { letter-spacing: 2.5px; font-size: 0.62rem; }
  .hero-tagline { letter-spacing: 1.5px; }
  .manual-grid { grid-template-columns: 1fr; }
  .manual-toc { position: static; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-links { text-align: left; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* Примечание под тарифами: мелко, по центру, под карточками. */
.plans-note { max-width: 720px; margin: 1.75rem auto 0; text-align: center; font-size: 0.9rem; color: var(--text-sub); }

/* ── ОБЪЁМ ─────────────────────────────────────────────────
   Панели и кнопки — как клавиши в приложении: светлый блик сверху,
   затемнение снизу, тонкая светлая кромка и тень под ними. При наведении
   панель чуть приподнимается, кнопка при нажатии проседает. */
.feature-card,
.mode-card,
.manual-toc,
.tabs {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.075) 0%, rgba(255,255,255,0) 46%, rgba(0,0,0,0.16) 100%),
    var(--bg-card);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.12),
    inset 0 -2px 0 rgba(0,0,0,0.22),
    0 10px 24px -8px rgba(0,0,0,0.55),
    0 2px 6px rgba(0,0,0,0.25);
}
.feature-card,
.mode-card { transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s; }
.feature-card:hover,
.mode-card:hover {
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.16),
    inset 0 -2px 0 rgba(0,0,0,0.22),
    0 18px 34px -10px rgba(0,0,0,0.6),
    0 0 0 1px rgba(167,139,250,0.18),
    0 6px 22px -6px rgba(167,139,250,0.35);
}

.tip-box {
  background: linear-gradient(90deg, rgba(99,208,250,0.13), rgba(99,208,250,0.05));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 6px 16px -8px rgba(0,0,0,0.5);
}

.btn { transition: transform 0.12s, box-shadow 0.2s, background 0.2s, color 0.2s; }
.btn-accent {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.28) 0%, rgba(255,255,255,0) 50%, rgba(0,0,0,0.14) 100%),
    linear-gradient(135deg, #5b4be0, #a78bfa, #4331c4);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.45),
    inset 0 -2px 0 rgba(0,0,0,0.18),
    0 8px 22px -6px rgba(167,139,250,0.55);
}
.btn-outline,
.btn-store {
  background-image: linear-gradient(180deg, rgba(255,255,255,0.09) 0%, rgba(255,255,255,0) 50%, rgba(0,0,0,0.18) 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.12),
    inset 0 -2px 0 rgba(0,0,0,0.25),
    0 8px 20px -8px rgba(0,0,0,0.6);
}
.btn:not(.btn-store-soon):active {
  transform: translateY(2px);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.35), 0 2px 6px -2px rgba(0,0,0,0.5);
}
.tab-btn { transition: transform 0.12s, background 0.2s, color 0.2s; }
.tab-btn:active { transform: translateY(1px); }
.tab-btn.active {
  background-image: linear-gradient(180deg, rgba(255,255,255,0.22) 0%, rgba(255,255,255,0) 55%, rgba(0,0,0,0.12) 100%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.35), 0 4px 12px -4px rgba(167,139,250,0.55);
}