/* ═══════════════════════════════════════
   MTG DESIGN SYSTEM — style.css
   Подключать на каждой странице
═══════════════════════════════════════ */

/* ── ШРИФТ ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;700&display=swap');

:root {
  --bg:      #F8F4EF;
  --dark:    #1C1C1C;
  --navy:    #08187B;
  --yellow:  #FFEDA9;
  --white:   #ffffff;
  --muted:   #8a8580;
  --border:  rgba(28,28,28,0.12);

  --font:    "Inter", sans-serif;
  --fs-xs:   11px;
  --fs-sm:   13px;
  --fs-base: 14px;
  --fs-md:   16px;
  --fs-lg:   18px;
  --fs-xl:   24px;
  --fs-2xl:  32px;
  --fs-3xl:  48px;
  --fs-hero: clamp(48px, 8vw, 96px);

  --radius:  0px;
  --gap:     24px;
  --max-w:   1200px;
  --nav-h:   60px;
}

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

body {
  font-family: var(--font);
  font-size: var(--fs-base);
  font-weight: 400;
  background: var(--bg);
  color: var(--dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: var(--font); cursor: pointer; }

/* ── НАВИГАЦИЯ ── */
.nav {
  position: sticky; top: 0; z-index: 200;
  height: var(--nav-h);
  background: var(--dark);
  border-bottom: 2px solid rgba(255,255,255,0.08);
  display: flex; align-items: center;
  padding: 0 40px; gap: 0;
}

.nav-logo {
  font-size: var(--fs-lg); font-weight: 700;
  color: var(--yellow); letter-spacing: 1px;
  margin-right: auto; white-space: nowrap;
}

.nav-logo span {
  color: rgba(255,237,169,0.4); font-weight: 400;
  font-size: var(--fs-xs); letter-spacing: 2px;
  margin-left: 8px; text-transform: uppercase;
}

.nav-links { display: flex; align-items: stretch; height: 100%; gap: 0; }

.nav-link {
  font-size: var(--fs-xs); font-weight: 700;
  letter-spacing: 2px; text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  padding: 0 18px; display: flex; align-items: center;
  border-right: 1px solid rgba(255,255,255,0.06);
  transition: color 0.15s; white-space: nowrap; position: relative;
}

.nav-link::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0;
  height: 2px; background: var(--yellow);
  transform: scaleX(0); transition: transform 0.2s;
}

.nav-link:hover { color: var(--yellow); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.active { color: var(--yellow); }
.nav-link.active::after { transform: scaleX(1); }

.nav-cta {
  font-size: var(--fs-xs); font-weight: 700;
  letter-spacing: 2px; text-transform: uppercase;
  color: var(--dark); background: var(--yellow);
  border: none; padding: 0 24px; height: 100%;
  cursor: pointer; transition: background 0.15s;
  white-space: nowrap; margin-left: 16px;
  display: flex; align-items: center;
}
.nav-cta:hover { background: var(--white); }

.nav-burger {
  display: none; flex-direction: column; gap: 5px;
  cursor: pointer; padding: 8px; margin-left: 12px;
}
.nav-burger span { display: block; width: 22px; height: 2px; background: var(--yellow); transition: all 0.2s; }

.nav-mobile {
  display: none; position: fixed; top: var(--nav-h); left: 0; right: 0;
  background: var(--dark); border-bottom: 2px solid rgba(255,255,255,0.08);
  flex-direction: column; z-index: 199; padding: 8px 0 16px;
}
.nav-mobile.open { display: flex; }
.nav-mobile .nav-link { padding: 14px 32px; border-right: none; border-bottom: 1px solid rgba(255,255,255,0.04); font-size: var(--fs-sm); }
.nav-mobile .nav-cta { margin: 12px 32px 0; height: 44px; justify-content: center; }

/* ── ФУТЕР ── */
.footer {
  background: var(--dark);
  border-top: 2px solid rgba(255,255,255,0.08);
  padding: 40px;
  display: grid; grid-template-columns: 1fr 1fr 1fr auto;
  gap: 32px; align-items: start;
}
.footer-brand { font-size: var(--fs-lg); font-weight: 700; color: var(--yellow); margin-bottom: 8px; }
.footer-desc { font-size: var(--fs-xs); color: rgba(255,255,255,0.35); line-height: 1.7; max-width: 220px; }
.footer-col-title { font-size: var(--fs-xs); font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: rgba(255,255,255,0.3); margin-bottom: 14px; }
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a { font-size: var(--fs-sm); color: rgba(255,255,255,0.5); transition: color 0.15s; }
.footer-links a:hover { color: var(--yellow); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 16px 40px; display: flex; justify-content: space-between;
  align-items: center; font-size: var(--fs-xs); color: rgba(255,255,255,0.25);
  letter-spacing: 1px; flex-wrap: wrap; gap: 8px; background: var(--dark);
}

/* ── FOOTER OWNER ── */
.footer-owner {
  background: var(--dark);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 10px 40px;
  display: flex;
  justify-content: center;
  gap: 32px;
  font-size: 11px;
  color: rgba(255,255,255,0.3);
  letter-spacing: 0.5px;
  flex-wrap: wrap;
}
@media (max-width: 600px) {
  .footer-owner { padding: 10px 20px; gap: 12px; flex-direction: column; align-items: center; text-align: center; }
}

/* ── DISCLAIMER ── */
.disclaimer {
  display: flex; align-items: flex-start; gap: 8px;
  font-size: var(--fs-xs); color: rgba(255,255,255,0.35);
  background: rgba(255,255,255,0.04); border-left: 2px solid rgba(255,255,255,0.12);
  border-radius: 0 6px 6px 0; padding: 10px 14px; margin-top: 16px; line-height: 1.5;
}
.disclaimer-icon { flex-shrink: 0; opacity: 0.5; }

/* ── LAYOUT ── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 40px; }
.section { padding: 80px 40px; }
.section-label { font-size: var(--fs-xs); font-weight: 700; letter-spacing: 3px; text-transform: uppercase; color: var(--muted); margin-bottom: 16px; }
.section-title { font-size: var(--fs-2xl); font-weight: 700; line-height: 1.1; margin-bottom: 24px; }
.section-sub { font-size: var(--fs-base); color: var(--muted); max-width: 520px; line-height: 1.7; }

/* ── КНОПКИ ── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font); font-size: var(--fs-xs);
  font-weight: 700; letter-spacing: 2px; text-transform: uppercase;
  padding: 14px 28px; border: 2px solid transparent;
  cursor: pointer; transition: all 0.15s; white-space: nowrap;
}
.btn-primary { background: var(--navy); color: var(--yellow); border-color: var(--navy); }
.btn-primary:hover { background: var(--dark); border-color: var(--dark); }
.btn-outline { background: transparent; color: var(--dark); border-color: var(--dark); }
.btn-outline:hover { background: var(--dark); color: var(--yellow); }
.btn-yellow { background: var(--yellow); color: var(--dark); border-color: var(--yellow); }
.btn-yellow:hover { background: var(--dark); color: var(--yellow); border-color: var(--dark); }
.btn-white { background: var(--white); color: var(--dark); border-color: var(--white); }
.btn-white:hover { background: var(--yellow); }
.btn-full { width: 100%; justify-content: center; }

/* ── КАРТОЧКИ ── */
.card { background: var(--white); border: 2px solid var(--border); padding: 28px; transition: border-color 0.15s, box-shadow 0.15s; }
.card:hover { border-color: var(--navy); box-shadow: 4px 4px 0 var(--navy); }
.tag { display: inline-block; font-size: var(--fs-xs); font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; padding: 3px 10px; border: 1px solid var(--border); }
.tag-navy { background: var(--navy); color: var(--yellow); border-color: var(--navy); }
.tag-yellow { background: var(--yellow); color: var(--dark); border-color: var(--yellow); }
.tag-outline { background: transparent; color: var(--muted); }
.divider { border: none; border-top: 2px solid var(--border); margin: 0; }

/* ── АНИМАЦИИ ── */
@keyframes fadeUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
.anim-fade-up { animation: fadeUp 0.5s both; }
.anim-fade-in { animation: fadeIn 0.4s both; }

/* ── HERO ── */
.hero { display: grid; grid-template-columns: 1fr 1fr; min-height: calc(100vh - var(--nav-h)); border-bottom: 2px solid var(--dark); }
.hero-left { background: var(--navy); padding: 64px 48px; display: flex; flex-direction: column; justify-content: space-between; border-right: 2px solid var(--dark); position: relative; overflow: hidden; }
.hero-left::after { content: 'MTG'; font-size: 280px; font-weight: 700; color: rgba(255,255,255,0.04); position: absolute; bottom: -40px; right: -20px; line-height: 1; pointer-events: none; letter-spacing: -10px; }
.hero-eyebrow { display: flex; align-items: center; gap: 10px; }
.hero-dot { width: 8px; height: 8px; background: var(--yellow); animation: blink 2s infinite; }
.hero-brain { display: inline-block; font-size: 18px; animation: spin 5s linear infinite; line-height: 1; }
.hf-plan { display: inline-block; font-size: 10px; font-weight: 700; letter-spacing: 0.5px; color: var(--navy); background: rgba(8,24,123,0.08); border: 1px solid rgba(8,24,123,0.2); padding: 2px 6px; margin-left: 4px; vertical-align: middle; }
.hero-eyebrow-text { font-size: var(--fs-xs); font-weight: 700; letter-spacing: 3px; text-transform: uppercase; color: rgba(255,237,169,0.5); }
.hero-title { font-size: var(--fs-hero); font-weight: 700; line-height: 0.92; color: var(--white); letter-spacing: -1px; z-index: 1; }
.hero-title .accent { color: var(--yellow); }
.hero-title .outlined { -webkit-text-stroke: 2px var(--yellow); color: transparent; }
.hero-bottom { display: flex; flex-direction: column; gap: 20px; z-index: 1; }
.hero-desc { font-size: var(--fs-base); color: rgba(255,255,255,0.55); max-width: 360px; line-height: 1.7; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-right { background: var(--bg); padding: 64px 48px; display: flex; flex-direction: column; justify-content: space-between; }
.hero-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border); border: 2px solid var(--border); margin-top: auto; }
.hero-stat { background: var(--bg); padding: 24px 20px; transition: background 0.15s; }
.hero-stat:hover { background: var(--yellow); }
.hero-stat-num { font-size: var(--fs-2xl); font-weight: 700; color: var(--navy); line-height: 1; white-space: nowrap; }

/* ── LIVE BADGE ── */
.stat-live-badge {
  grid-column: 1 / -1;
  display: flex; align-items: center; gap: 8px;
  padding: 8px 20px; background: var(--dark);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.stat-live-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: #4ADE80; flex-shrink: 0;
  animation: livePulse 1.6s ease-in-out infinite;
}
@keyframes livePulse {
  0%,100% { opacity:1; box-shadow: 0 0 0 0 rgba(74,222,128,0.5); }
  50%      { opacity:.75; box-shadow: 0 0 0 5px rgba(74,222,128,0); }
}
.stat-live-label {
  font-size: 10px; font-weight: 700; letter-spacing: 2px;
  text-transform: uppercase; color: rgba(255,255,255,0.4);
}
@keyframes cntFlash {
  0%   { color: var(--navy); }
  40%  { color: #4ADE80; }
  100% { color: var(--navy); }
}
.cnt-flash { animation: cntFlash 0.45s ease; }
.hero-stat-headline { display: flex; align-items: baseline; gap: 6px; }
.hero-stat-label { font-size: var(--fs-lg); font-weight: 700; color: var(--dark); }
.hero-stat-desc { font-size: var(--fs-xs); color: var(--muted); line-height: 1.55; margin-top: 6px; }
.hero-features { display: flex; flex-direction: column; gap: 0; }
.hero-feature { display: flex; align-items: flex-start; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--border); font-size: var(--fs-sm); color: var(--muted); line-height: 1.6; }
.hero-feature-icon { font-size: 18px; width: 28px; text-align: center; flex-shrink: 0; }
.hero-feature strong { color: var(--dark); font-weight: 700; }

/* ── MARQUEE ── */
.marquee-wrap { background: var(--navy); border-bottom: 2px solid var(--dark); overflow: hidden; padding: 14px 0; white-space: nowrap; }
.marquee-track { display: inline-flex; gap: 0; animation: marquee 30s linear infinite; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.marquee-item { font-size: var(--fs-xs); font-weight: 700; letter-spacing: 3px; text-transform: uppercase; color: rgba(255,237,169,0.5); padding: 0 32px; }
.marquee-item.accent { color: var(--yellow); }

/* ── КАК РАБОТАЕТ ── */
.how-section { display: grid; grid-template-columns: 1fr 1fr; border-bottom: 2px solid var(--dark); }
.how-left { padding: 80px 48px; border-right: 2px solid var(--dark); }
.how-right { padding: 80px 48px; background: var(--dark); }
.how-steps { display: flex; flex-direction: column; gap: 0; margin-top: 40px; }
.how-step { display: grid; grid-template-columns: 44px 1fr; gap: 16px; padding: 24px 0; border-bottom: 1px solid var(--border); align-items: center; }
.how-step:last-child { border-bottom: none; }
.how-step-num { font-size: var(--fs-base); font-weight: 700; color: var(--navy); line-height: 1.2; }
.how-step-title { font-size: var(--fs-lg); font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.how-right .how-step-title { color: var(--white); }
.how-step-desc { font-size: var(--fs-sm); color: var(--muted); line-height: 1.6; }
.how-right .how-step-desc { color: rgba(255,255,255,0.45); }

/* ── ФИЧИ ── */
.features-section { padding: 0; border-bottom: 2px solid var(--dark); }
.features-header { padding: 64px 48px 40px; border-bottom: 2px solid var(--dark); }
.features-grid { display: grid; grid-template-columns: repeat(2, 1fr); }
.feature-card { padding: 40px 36px; border-right: 2px solid var(--dark); border-bottom: 2px solid var(--dark); position: relative; transition: background 0.15s; }
.feature-card:nth-child(2n) { border-right: none; }
.feature-card:nth-child(n+3) { border-bottom: none; }
.feature-card:hover { background: var(--yellow); }
.feature-icon { font-size: 28px; margin-bottom: 16px; opacity: 0.7; transition: opacity 0.15s; }
.feature-card:hover .feature-icon { opacity: 1; }
.feature-title { font-size: var(--fs-lg); font-weight: 700; color: var(--dark); margin-bottom: 8px; line-height: 1.2; }
.feature-desc { font-size: var(--fs-sm); color: var(--muted); line-height: 1.65; }
.feature-tag { position: absolute; top: 16px; right: 16px; font-size: 9px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; padding: 3px 8px; }
.feature-tag.mvp { background: var(--navy); color: var(--yellow); }
.feature-tag.soon { background: transparent; color: var(--muted); border: 1px solid var(--border); }

/* ── ТАРИФЫ ── */
.pricing-section { border-bottom: 2px solid var(--dark); }
.pricing-header { padding: 64px 48px 40px; border-bottom: 2px solid var(--dark); }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.pricing-card { padding: 40px 28px; border-right: 2px solid var(--dark); display: flex; flex-direction: column; }
.pricing-card:last-child { border-right: none; }
.pricing-card.featured { background: var(--navy); }
.pricing-card.featured .pricing-price, .pricing-card.featured .pricing-name { color: var(--yellow); }
.pricing-card.featured .pricing-desc { color: rgba(255,237,169,0.5); }
.pricing-card.featured .pricing-features li { color: rgba(255,255,255,0.7); }
.pricing-card.featured .pricing-features li::before { color: var(--yellow); }
.pricing-badge { font-size: 9px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--dark); background: var(--yellow); padding: 3px 10px; display: inline-block; width: fit-content; margin-bottom: 16px; }
.pricing-name { font-size: var(--fs-2xl); font-weight: 700; color: var(--dark); line-height: 1; margin-bottom: 4px; }
.pricing-price { font-size: var(--fs-3xl); font-weight: 700; color: var(--navy); line-height: 1; margin: 16px 0 4px; }
.pricing-price sub { font-size: var(--fs-sm); font-weight: 400; color: var(--muted); }
.pricing-desc { font-size: var(--fs-sm); color: var(--muted); margin-bottom: 24px; line-height: 1.5; }
.pricing-divider { border: none; border-top: 1px solid var(--border); margin: 24px 0; }
.pricing-features { list-style: none; display: flex; flex-direction: column; gap: 10px; flex: 1; margin-bottom: 28px; }
.pricing-features li { font-size: var(--fs-sm); color: var(--dark); display: flex; gap: 8px; line-height: 1.5; }
.pricing-features li::before { content: '→'; color: var(--navy); flex-shrink: 0; font-weight: 700; }
.pricing-features li.muted { color: var(--muted); }
.pricing-features li.muted::before { color: var(--border); }

/* ── CTA ── */
.cta-section { background: var(--navy); padding: 80px 48px; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 40px; border-bottom: 2px solid var(--dark); }
.cta-title { font-size: var(--fs-3xl); font-weight: 700; color: var(--white); line-height: 1.1; }
.cta-title span { color: var(--yellow); }
.cta-sub { font-size: var(--fs-base); color: rgba(255,255,255,0.45); margin-top: 8px; max-width: 480px; line-height: 1.6; }

/* ── ГЕНЕРАТОР (страница) ── */
.gen-page-header { background: var(--navy); padding: 40px 48px; border-bottom: 2px solid var(--dark); display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.gen-wrap { padding: 64px 48px; border-bottom: 2px solid var(--dark); }
.gen-filters { display: grid; grid-template-columns: 1fr 1fr 1fr auto; gap: 16px; align-items: end; margin-bottom: 40px; }
.gen-label { font-size: var(--fs-xs); font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; display: block; }
.gen-select {
  width: 100%; padding: 12px 16px; background: var(--white);
  border: 2px solid var(--border); font-family: var(--font);
  font-size: var(--fs-sm); color: var(--dark); cursor: pointer;
  appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%231C1C1C' stroke-width='2' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center;
  transition: border-color 0.15s;
}
.gen-select:focus { outline: none; border-color: var(--navy); }
.gen-result { display: none; animation: fadeUp 0.4s both; }
.gen-result.visible { display: block; }
.topic-card { background: var(--white); border: 2px solid var(--dark); overflow: hidden; }
.topic-header { background: var(--navy); padding: 28px 32px; display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; }
.topic-name { font-size: var(--fs-2xl); font-weight: 700; color: var(--white); line-height: 1.1; }
.topic-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.topic-body { padding: 0; }
.topic-section { padding: 20px 32px; border-bottom: 1px solid var(--border); display: grid; grid-template-columns: 160px 1fr; gap: 16px; align-items: start; }
.topic-section:last-child { border-bottom: none; }
.topic-section-label { font-size: var(--fs-xs); font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--muted); padding-top: 2px; }
.topic-section-text { font-size: var(--fs-sm); color: var(--dark); line-height: 1.7; }
.topic-kr { background: #F0F4FF; border-left: 4px solid var(--navy); }
.topic-kr .topic-section-text { color: var(--navy); font-weight: 400; }

/* ── ТЕСТЫ ── */
.quiz-wrap { margin-top: 32px; }
.quiz-title { font-size: var(--fs-xl); font-weight: 700; margin-bottom: 20px; }
.quiz-question { background: var(--white); border: 2px solid var(--border); padding: 24px; margin-bottom: 16px; }
.quiz-q { font-size: var(--fs-base); font-weight: 700; margin-bottom: 14px; line-height: 1.4; }
.quiz-options { display: flex; flex-direction: column; gap: 8px; }
.quiz-opt { padding: 10px 16px; border: 2px solid var(--border); cursor: pointer; font-size: var(--fs-sm); transition: all 0.15s; text-align: left; background: var(--bg); font-family: var(--font); }
.quiz-opt:hover { border-color: var(--navy); background: var(--white); }
.quiz-opt.correct { background: #d4edda; border-color: #28a745; color: #155724; }
.quiz-opt.wrong { background: #f8d7da; border-color: #dc3545; color: #721c24; }
.quiz-opt:disabled { cursor: default; }

/* ── ЗАДАЧА ── */
.task-card { background: var(--navy); padding: 24px; margin-top: 16px; }
.task-label { font-size: var(--fs-sm); font-weight: 700; color: var(--yellow); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 12px; }
.task-text { font-size: var(--fs-base); color: var(--white); line-height: 1.75; margin-bottom: 18px; }
.task-btn { padding: 10px 22px; background: var(--yellow); color: var(--dark); border: none; cursor: pointer; font-weight: 700; font-size: var(--fs-sm); font-family: var(--font); transition: opacity 0.15s; }
.task-btn:hover { opacity: 0.85; }
.task-answer { font-size: var(--fs-base); color: var(--white); line-height: 1.75; padding: 16px 20px; background: rgba(255,255,255,0.07); border-left: 3px solid var(--yellow); }
.task-prompt { font-size: var(--fs-sm); color: rgba(255,255,255,0.65); margin-bottom: 10px; }
.task-textarea { width: 100%; min-height: 110px; padding: 10px 14px; border: 1.5px solid rgba(255,255,255,0.2); border-radius: 6px; background: rgba(255,255,255,0.07); color: var(--white); font-family: var(--font); font-size: var(--fs-base); line-height: 1.6; resize: vertical; box-sizing: border-box; margin-bottom: 12px; display: block; }
.task-textarea::placeholder { color: rgba(255,255,255,0.3); }
.task-textarea:focus { outline: none; border-color: var(--yellow); }
.task-check-btn { padding: 10px 22px; background: var(--yellow); color: var(--dark); border: none; cursor: pointer; font-weight: 700; font-size: var(--fs-sm); font-family: var(--font); transition: opacity 0.15s; border-radius: 4px; }
.task-check-btn:hover { opacity: 0.85; }
.task-correct-label { font-size: var(--fs-sm); font-weight: 700; color: var(--yellow); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 8px; margin-top: 4px; }
.task-fb-good { color: #7ee8a2; font-size: var(--fs-sm); font-weight: 600; margin-top: 14px; }
.task-fb-miss { margin-top: 14px; }
.task-review-title { color: var(--yellow); font-weight: 700; font-size: var(--fs-sm); margin-bottom: 6px; }
.task-review-list { margin: 0 0 0 18px; padding: 0; }
.task-review-list li { color: rgba(255,255,255,0.85); font-size: var(--fs-sm); margin-bottom: 4px; line-height: 1.6; }

/* ── СТРАНИЦА О ПРОЕКТЕ ── */
.about-hero { background: var(--navy); padding: 80px 48px; border-bottom: 2px solid var(--dark); display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about-stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: rgba(255,255,255,0.1); }
.about-stat { background: var(--navy); padding: 28px 24px; border: 1px solid rgba(255,255,255,0.08); }
.about-stat:hover { background: rgba(255,255,255,0.05); }
.about-stat-num { font-size: var(--fs-3xl); font-weight: 700; color: var(--yellow); }
.about-stat-label { font-size: var(--fs-xs); color: rgba(255,255,255,0.4); letter-spacing: 1.5px; text-transform: uppercase; margin-top: 4px; }

.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 2px solid var(--dark); }
.value-card { padding: 40px 36px; border-right: 2px solid var(--dark); border-bottom: 2px solid var(--dark); display: grid; grid-template-rows: 48px 48px auto auto; row-gap: 10px; align-content: start; }
.value-card:nth-child(3n) { border-right: none; }
.value-icon { font-size: 32px; display: flex; align-items: center; margin: 0; }
.value-title { font-size: var(--fs-lg); font-weight: 700; margin: 0; }
.value-desc { font-size: var(--fs-sm); color: var(--muted); line-height: 1.65; }

/* ── БЛОГ ── */
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 2px solid var(--dark); }
.blog-card { padding: 36px; border-right: 2px solid var(--dark); border-bottom: 2px solid var(--dark); display: flex; flex-direction: column; gap: 12px; transition: background 0.15s; }
.blog-card:nth-child(3n) { border-right: none; }
.blog-card:hover { background: var(--white); }
.blog-card-date { font-size: var(--fs-xs); color: var(--muted); letter-spacing: 1.5px; }
.blog-card-title { font-size: var(--fs-lg); font-weight: 700; line-height: 1.3; }
.blog-card-excerpt { font-size: var(--fs-sm); color: var(--muted); line-height: 1.6; flex: 1; }
.blog-card-read { font-size: var(--fs-xs); font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--navy); }

/* ── АВТОРИЗАЦИЯ ── */
.auth-wrap {
  min-height: calc(100vh - var(--nav-h) - 100px);
  display: flex; align-items: center; justify-content: center;
  padding: 60px 20px;
}
.auth-box { width: 100%; max-width: 440px; background: var(--white); border: 2px solid var(--dark); padding: 40px; }
.auth-title { font-size: var(--fs-2xl); font-weight: 700; margin-bottom: 4px; }
.auth-sub { font-size: var(--fs-sm); color: var(--muted); margin-bottom: 32px; }
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: var(--fs-xs); font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
.form-input {
  width: 100%; padding: 12px 16px; background: var(--bg);
  border: 2px solid var(--border); font-family: var(--font);
  font-size: var(--fs-base); color: var(--dark); transition: border-color 0.15s;
}
.form-input:focus { outline: none; border-color: var(--navy); background: var(--white); }
.form-hint { font-size: var(--fs-xs); color: var(--muted); margin-top: 6px; }
.auth-divider { display: flex; align-items: center; gap: 12px; margin: 24px 0; color: var(--muted); font-size: var(--fs-xs); }
.auth-divider::before, .auth-divider::after { content: ''; flex: 1; border-top: 1px solid var(--border); }
.auth-link { font-size: var(--fs-sm); text-align: center; margin-top: 20px; color: var(--muted); }
.auth-link a { color: var(--navy); font-weight: 700; }
.auth-link a:hover { text-decoration: underline; }

/* Выбор плана (register) */
.plan-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 20px; }
.plan-option { padding: 14px 16px; border: 2px solid var(--border); cursor: pointer; transition: all 0.15s; position: relative; }
.plan-option input { position: absolute; opacity: 0; }
.plan-option:has(input:checked) { border-color: var(--navy); background: #F0F4FF; }
.plan-option:hover { border-color: rgba(8,24,123,0.4); }
.plan-name { font-size: var(--fs-sm); font-weight: 700; }
.plan-price { font-size: var(--fs-xs); color: var(--muted); margin-top: 2px; }
.plan-desc { font-size: var(--fs-xs); color: var(--muted); margin-top: 2px; }
.plan-badge { font-size: 9px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; background: var(--yellow); color: var(--dark); padding: 2px 6px; display: inline-block; margin-bottom: 4px; }

/* Блог — доп. элементы */
.blog-card-emoji { font-size: 40px; line-height: 1; margin-bottom: 4px; }
.blog-card-body { display: flex; flex-direction: column; flex: 1; }
.blog-card-desc { font-size: var(--fs-sm); color: var(--muted); line-height: 1.65; flex: 1; margin-bottom: 12px; }
.blog-card-footer { display: flex; align-items: center; justify-content: space-between; padding-top: 12px; border-top: 1px solid var(--border); font-size: var(--fs-xs); color: var(--muted); margin-top: auto; }

/* О проекте — hero title и sub */
.about-hero-title { font-size: clamp(28px,4.5vw,52px); font-weight: 700; color: var(--white); margin: 16px 0; line-height: 1.15; }
.about-hero-sub { font-size: var(--fs-base); color: rgba(255,255,255,0.55); line-height: 1.75; max-width: 580px; }

/* ── ТАБЛИЦА СРАВНЕНИЯ ТАРИФОВ ── */
.pricing-compare { background: var(--dark); padding: 48px; border-top: 2px solid rgba(255,255,255,0.08); }
.pricing-compare-title { font-size: var(--fs-xl); font-weight: 700; color: var(--white); margin-bottom: 28px; }
.compare-table { width: 100%; min-width: 480px; border-collapse: collapse; font-size: var(--fs-sm); }
.compare-table thead tr { border-bottom: 2px solid rgba(255,255,255,0.12); }
.compare-table th { padding: 12px 16px; font-weight: 700; color: rgba(255,255,255,0.5); text-align: center; font-size: var(--fs-xs); letter-spacing: 1.5px; text-transform: uppercase; }
.compare-th-feat { text-align: left !important; color: rgba(255,255,255,0.3) !important; }
.compare-th-pro { color: var(--yellow) !important; }
.compare-table tbody tr { border-bottom: 1px solid rgba(255,255,255,0.06); transition: background 0.15s; }
.compare-table tbody tr:hover { background: rgba(255,255,255,0.04); }
.compare-table tbody tr:last-child { border-bottom: none; }
.compare-table td { padding: 13px 16px; text-align: center; color: rgba(255,255,255,0.6); }
.compare-table td:first-child { text-align: left; color: rgba(255,255,255,0.5); }
.compare-yes { color: var(--yellow) !important; font-weight: 700; font-size: 16px; }
.compare-no { color: rgba(255,255,255,0.2) !important; }

/* ── УТИЛИТЫ ── */
.pg-sec    { padding: 80px 48px; }
.pg-sec-sm { padding: 64px 48px; }
.pg-hero   { padding: 80px 48px; text-align: center; border-bottom: 2px solid var(--dark); }
.pg-inner  { max-width: 1100px; margin: 0 auto; }
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.blog-featured-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; margin-top: 24px; }
.name-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ── СТАТЬИ / КР — поиск и теги ── */
.articles-search-wrap { position: relative; max-width: 520px; margin-bottom: 20px; }
.articles-search {
  width: 100%; padding: 12px 44px 12px 16px;
  background: rgba(255,255,255,0.1); border: 2px solid rgba(255,255,255,0.2);
  font-family: var(--font); font-size: var(--fs-sm); color: var(--white);
  transition: border-color 0.15s;
}
.articles-search::placeholder { color: rgba(255,255,255,0.4); }
.articles-search:focus { outline: none; border-color: var(--yellow); background: rgba(255,255,255,0.15); }
.articles-search-icon { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); font-size: 16px; pointer-events: none; }
.articles-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.art-tag {
  font-family: var(--font); font-size: var(--fs-xs); font-weight: 700;
  letter-spacing: 1.5px; text-transform: uppercase;
  padding: 6px 14px; background: transparent;
  border: 1px solid rgba(255,255,255,0.25); color: rgba(255,255,255,0.5);
  cursor: pointer; transition: all 0.15s;
}
.art-tag:hover { border-color: var(--yellow); color: var(--yellow); }
.art-tag.active { background: var(--yellow); border-color: var(--yellow); color: var(--dark); }
.articles-specialty-select {
  padding: 6px 32px 6px 12px; background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.25); color: var(--white);
  font-family: var(--font); font-size: var(--fs-xs); font-weight: 700;
  letter-spacing: 1px; cursor: pointer; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23FFEDA9' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center;
}
.articles-specialty-select:focus { outline: none; border-color: var(--yellow); }
.articles-specialty-select option, .articles-specialty-select optgroup { background: var(--dark); color: var(--white); }

.art-new-badge {
  display: inline-block; font-size: 9px; font-weight: 700; letter-spacing: 1.5px;
  text-transform: uppercase; background: var(--yellow); color: var(--dark);
  padding: 2px 7px; vertical-align: middle;
}

/* ── ВНЕШНИЙ ПОИСК ── */
.ext-search-row { display:flex; gap:12px; align-items:center; max-width:680px; }
.ext-search-row .ext-search-input {
  flex:1; padding:12px 16px; background:rgba(255,255,255,0.08);
  border:2px solid rgba(255,255,255,0.15); font-family:var(--font);
  font-size:var(--fs-sm); color:var(--white); transition:border-color 0.15s;
}
.ext-search-row .ext-search-input::placeholder { color:rgba(255,255,255,0.35); }
.ext-search-row .ext-search-input:focus { outline:none; border-color:var(--yellow); }
.ext-src {
  font-family:var(--font); font-size:var(--fs-xs); font-weight:700;
  letter-spacing:1.5px; text-transform:uppercase; padding:6px 14px;
  background:transparent; border:1px solid rgba(255,255,255,0.2);
  color:rgba(255,255,255,0.45); cursor:pointer; transition:all 0.15s;
}
.ext-src:hover { border-color:var(--yellow); color:var(--yellow); }
.ext-src.active { background:var(--yellow); border-color:var(--yellow); color:var(--dark); }
.ext-results { display:flex; flex-direction:column; gap:0; margin-top:16px; }
.ext-result-card {
  padding:20px 0; border-bottom:1px solid rgba(255,255,255,0.07);
  transition:background 0.15s;
}
.ext-result-card:last-child { border-bottom:none; }
.ext-result-badge {
  font-size:9px; font-weight:700; letter-spacing:1.5px; text-transform:uppercase;
  background:var(--navy); color:var(--yellow); padding:2px 8px;
  display:inline-block; margin-bottom:8px;
}
.ext-result-title { font-size:var(--fs-base); font-weight:700; line-height:1.4; margin-bottom:6px; }
.ext-result-title a { color:var(--white); transition:color 0.15s; }
.ext-result-title a:hover { color:var(--yellow); }
.ext-result-meta { font-size:var(--fs-xs); color:rgba(255,255,255,0.4); display:flex; flex-wrap:wrap; gap:4px; margin-bottom:8px; }
.ext-result-abstract { font-size:var(--fs-xs); color:rgba(255,255,255,0.45); line-height:1.65; }

/* ── КР — группы и карточки ── */
.kr-group { margin-bottom: 40px; }
.kr-group-title {
  font-size: var(--fs-lg); font-weight: 700; color: var(--dark);
  padding-bottom: 12px; border-bottom: 2px solid var(--dark);
  margin-bottom: 0;
}
.kr-list { display: flex; flex-direction: column; }
.kr-item {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 16px 0; border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}
.kr-item:last-child { border-bottom: none; }
.kr-item:hover { background: rgba(8,24,123,0.04); padding-left: 8px; padding-right: 8px; margin: 0 -8px; }
.kr-item-left { flex: 1; }
.kr-item-right { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.kr-name { font-size: var(--fs-sm); font-weight: 700; color: var(--dark); margin-bottom: 4px; line-height: 1.4; }
.kr-meta { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.kr-year {
  font-size: 9px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase;
  background: var(--navy); color: var(--yellow); padding: 2px 7px;
}
.kr-code { font-size: var(--fs-xs); color: var(--muted); }

/* ── АДАПТИВ: планшет горизонтальный (≤1024px) ── */
@media (max-width: 1024px) {
  .footer { grid-template-columns: 1fr 1fr; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-left { padding: 56px 40px; min-height: auto; }
  .hero-right { padding: 48px 40px; }
  .how-section { grid-template-columns: 1fr; }
  .how-left { padding: 56px 40px; border-right: none; border-bottom: 2px solid var(--dark); }
  .how-right { padding: 56px 40px; }
  .pricing-grid { grid-template-columns: 1fr 1fr 1fr; }
  .pricing-card:nth-child(4) { border-right: none; border-top: 2px solid var(--dark); }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .gen-filters { grid-template-columns: 1fr 1fr; }
  .values-grid { grid-template-columns: 1fr 1fr; }
  /* 2-col: same pattern — restore col-1 (item 3), then col-2 removes (item 6 = both 3n and 2n → 2n wins last) */
  .value-card:nth-child(3n) { border-right: 2px solid var(--dark); }
  .value-card:nth-child(2n) { border-right: none; }
  .blog-grid { grid-template-columns: 1fr 1fr; }
  .blog-card:nth-child(2n) { border-right: none; }
  .about-hero { padding: 56px 40px; }
  .pg-sec    { padding: 64px 40px; }
  .pg-sec-sm { padding: 48px 40px; }
  .pg-hero   { padding: 64px 40px; }
}

/* ── АДАПТИВ: планшет вертикальный и мобильный (≤768px) ── */
@media (max-width: 768px) {
  :root { --nav-h: 56px; }
  .nav-links, .nav-cta { display: none; }
  .nav-burger { display: flex; }
  .nav { padding: 0 20px; }

  .section { padding: 48px 20px; }
  .container { padding: 0 20px; }
  .footer { grid-template-columns: 1fr; padding: 32px 20px; }
  .footer-bottom { padding: 14px 20px; }

  /* Hero */
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-left { padding: 40px 20px; min-height: auto; }
  .hero-left::after { display: none; }
  .hero-right { padding: 36px 20px; }
  .hero-actions { flex-wrap: wrap; }

  /* How */
  .how-section { grid-template-columns: 1fr; }
  .how-left { padding: 48px 20px; border-right: none; border-bottom: 2px solid var(--dark); }
  .how-right { padding: 48px 20px; }

  /* Features */
  .features-grid { grid-template-columns: 1fr; }
  .feature-card { border-right: none !important; }
  .features-header { padding: 40px 20px 28px; }

  /* Pricing */
  .pricing-grid { grid-template-columns: 1fr; }
  .pricing-card { border-right: none !important; border-bottom: 2px solid var(--dark); padding: 28px 20px; }
  .pricing-card:last-child { border-bottom: none; }
  .pricing-header { padding: 40px 20px 28px; }
  .pricing-price { font-size: var(--fs-2xl); }

  /* CTA */
  .cta-section { grid-template-columns: 1fr; padding: 48px 20px; }
  .cta-title { font-size: var(--fs-2xl); }

  /* Generator */
  .gen-page-header { padding: 28px 20px; }
  .gen-wrap { padding: 36px 20px; }
  .gen-filters { grid-template-columns: 1fr; }
  .topic-header { padding: 20px; flex-direction: column; gap: 12px; }
  .topic-section { grid-template-columns: 1fr; padding: 16px 20px; }
  .topic-name { font-size: var(--fs-xl); }

  /* About */
  .about-hero { grid-template-columns: 1fr; padding: 40px 20px; }
  .about-stats-grid { grid-template-columns: 1fr 1fr; }
  .values-grid { grid-template-columns: 1fr; }
  .value-card { border-right: none !important; }

  /* Blog */
  .blog-grid { grid-template-columns: 1fr; }
  .blog-card { border-right: none !important; }
  .blog-featured-grid { grid-template-columns: 1fr !important; }

  /* Pricing compare */
  .pricing-compare { padding: 32px 20px; }

  /* Articles / КР */
  .articles-search-wrap { max-width: 100%; }
  .kr-item { flex-direction: column; align-items: flex-start; }
  .kr-item-right { margin-top: 8px; }

  /* Auth */
  .auth-box { padding: 28px 20px; }
  .plan-grid { grid-template-columns: 1fr 1fr; }

  /* Utility */
  .pg-sec    { padding: 48px 20px; }
  .pg-sec-sm { padding: 40px 20px; }
  .pg-hero   { padding: 48px 20px; }
  .pg-inner  { padding: 0; }
  .name-row  { grid-template-columns: 1fr 1fr; }

  /* Disclaimer inside topic-body — align with topic-section horizontal padding */
  .topic-body .disclaimer { margin: 16px 20px; }
}

/* ── БОГАТЫЙ КОНТЕНТ В РАЗБОРАХ ТЕМ (study-section-text) ── */
.study-section-text p { margin: 0 0 10px; }
.study-section-text p:last-child { margin-bottom: 0; }
.study-section-text h4 { font-size: var(--fs-sm); font-weight: 700; color: var(--dark); margin: 16px 0 6px; letter-spacing: 0.01em; }
.study-section-text h4:first-child { margin-top: 0; }
.study-section-text ul, .study-section-text ol { margin: 0 0 10px; padding-left: 22px; }
.study-section-text li { margin-bottom: 5px; line-height: 1.6; }
.study-section-text table { width: 100%; border-collapse: collapse; font-size: 12px; margin: 12px 0; }
.study-section-text th { background: var(--navy); color: var(--white); font-weight: 700; padding: 8px 12px; text-align: left; font-size: 11px; letter-spacing: 0.04em; }
.study-section-text td { padding: 7px 12px; border-bottom: 1px solid var(--border); vertical-align: top; line-height: 1.5; }
.study-section-text tr:nth-child(even) td { background: rgba(0,0,0,0.025); }
.study-section-text strong { font-weight: 700; }
.algo-box { background: #EEF2FF; border: 2px solid var(--navy); padding: 14px 18px; margin: 12px 0; font-size: 13px; line-height: 1.75; border-radius: 2px; }
.algo-box-title { font-weight: 700; color: var(--navy); font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 8px; }
.warn-box { background: #FFFBEB; border-left: 4px solid var(--yellow); padding: 10px 14px; margin: 10px 0; font-size: 13px; color: var(--dark); line-height: 1.6; }
.study-section.kr-s .study-section-text h4 { color: var(--navy); }

/* ── РУБРИКИ ДНЯ (articles.html) ── */
.daily-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.daily-card {
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12);
  border-radius: 4px; padding: 20px; display: flex; flex-direction: column; gap: 8px;
}
.daily-card-icon { font-size: 26px; line-height: 1; }
.daily-card-tag { font-size: 11px; font-weight: 700; color: var(--yellow); text-transform: uppercase; letter-spacing: 0.07em; }
.daily-card-text { color: rgba(255,255,255,0.75); font-size: var(--fs-sm); line-height: 1.65; flex: 1; margin: 0; }
.daily-card-src { color: var(--yellow); font-size: var(--fs-xs); font-weight: 700; text-decoration: none; }
.daily-card-src:hover { text-decoration: underline; }
@media (max-width: 768px) { .daily-grid { grid-template-columns: 1fr; } }

/* ── СТРАНИЦА РАЗБОРОВ ТЕМ (study.html) ── */
.study-page-header { background: var(--navy); padding: 40px 48px; border-bottom: 2px solid var(--dark); }
.study-layout { display: grid; grid-template-columns: 240px 1fr; border-bottom: 2px solid var(--dark); }
.study-sidebar {
  border-right: 2px solid var(--dark); position: sticky; top: var(--nav-h);
  height: calc(100vh - var(--nav-h)); overflow-y: auto; background: var(--dark); padding-bottom: 40px;
}
.study-sidebar::-webkit-scrollbar { width: 4px; }
.study-sidebar::-webkit-scrollbar-track { background: transparent; }
.study-sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); }
.study-sidebar-hd { font-size: var(--fs-xs); font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: rgba(255,237,169,0.4); padding: 20px 20px 12px; border-bottom: 1px solid rgba(255,255,255,0.06); }
.study-group { }
.study-group-btn { width: 100%; text-align: left; background: none; border: none; color: rgba(255,255,255,0.4); font-family: var(--font); font-size: var(--fs-xs); font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; padding: 12px 20px 8px; cursor: pointer; display: flex; justify-content: space-between; transition: color 0.15s; }
.study-group-btn:hover { color: var(--yellow); }
.study-group-btn.open { color: rgba(255,237,169,0.7); }
.study-group-items { display: none; }
.study-group-items.open { display: flex; flex-direction: column; }
.study-nav-all { width: 100%; text-align: left; background: none; border: none; border-top: 1px solid rgba(255,255,255,0.06); color: rgba(255,255,255,0.5); font-family: var(--font); font-size: var(--fs-sm); padding: 14px 20px; cursor: pointer; transition: all 0.15s; }
.study-nav-all:hover { color: var(--yellow); background: rgba(255,255,255,0.04); }
.study-nav-all.active { color: var(--yellow); }
.study-nav-item { width: 100%; text-align: left; background: none; border: none; border-left: 2px solid transparent; color: rgba(255,255,255,0.45); font-family: var(--font); font-size: var(--fs-sm); padding: 8px 20px 8px 26px; cursor: pointer; transition: all 0.15s; }
.study-nav-item:hover { color: var(--white); background: rgba(255,255,255,0.04); border-left-color: rgba(255,255,255,0.2); }
.study-nav-item.active { color: var(--yellow); border-left-color: var(--yellow); background: rgba(255,237,169,0.06); }
.study-content { padding: 40px 48px; min-height: calc(100vh - var(--nav-h)); }
.study-search-wrap { position: relative; max-width: 520px; margin-bottom: 0; }
.study-search { width: 100%; padding: 12px 44px 12px 16px; background: rgba(255,255,255,0.1); border: 2px solid rgba(255,255,255,0.2); font-family: var(--font); font-size: var(--fs-sm); color: var(--white); transition: border-color 0.15s; }
.study-search::placeholder { color: rgba(255,255,255,0.4); }
.study-search:focus { outline: none; border-color: var(--yellow); }
.study-search-icon { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); font-size: 16px; pointer-events: none; }
.study-sidebar-mobile-wrap { display: none; padding: 12px 20px; background: var(--dark); border-bottom: 1px solid rgba(255,255,255,0.08); }
.study-sidebar-mobile { width: 100%; padding: 8px 12px; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2); color: var(--white); font-family: var(--font); font-size: var(--fs-sm); font-weight: 700; appearance: none; cursor: pointer; }
.study-sidebar-mobile:focus { outline: none; }
.study-sidebar-mobile option, .study-sidebar-mobile optgroup { background: var(--dark); color: var(--white); }
.study-count-label { font-size: var(--fs-xs); color: var(--muted); margin-bottom: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; display: flex; align-items: center; flex-wrap: wrap; gap: 4px; }
.study-count-sub { font-size: 12px; font-weight: 400; letter-spacing: 0; text-transform: none; color: var(--muted); }
.study-show-all-btn { background: none; border: none; color: var(--navy); font-size: 12px; font-family: var(--font); cursor: pointer; margin-left: 4px; text-decoration: underline; padding: 0; letter-spacing: 0; text-transform: none; font-weight: 600; }
.study-show-all-btn:hover { color: var(--dark); }
.study-inline-search-wrap { position: relative; margin-bottom: 20px; }
.study-inline-search { width: 100%; padding: 12px 44px 12px 16px; background: var(--white); border: 2px solid var(--border); font-family: var(--font); font-size: var(--fs-sm); color: var(--dark); box-sizing: border-box; transition: border-color 0.15s; }
.study-inline-search::placeholder { color: var(--muted); }
.study-inline-search:focus { outline: none; border-color: var(--navy); }
.study-inline-search-icon { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); font-size: 16px; pointer-events: none; }
.study-cards-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 2px solid var(--dark); }
.study-card { padding: 24px 28px; border-right: 2px solid var(--dark); border-bottom: 2px solid var(--dark); cursor: pointer; transition: background 0.15s; }
.study-card:nth-child(2n) { border-right: none; }
.study-card:hover { background: var(--yellow); }
.study-card:hover .study-card-sub { color: var(--dark); }
.study-card-subject { font-size: var(--fs-xs); font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; color: var(--navy); margin-bottom: 6px; }
.study-card-name { font-size: var(--fs-base); font-weight: 700; color: var(--dark); margin-bottom: 4px; line-height: 1.3; }
.study-card-sub { font-size: var(--fs-xs); color: var(--muted); line-height: 1.5; transition: color 0.15s; }
.study-topic-detail { animation: fadeUp 0.3s both; }
.study-back-btn { background: none; border: none; font-family: var(--font); font-size: var(--fs-xs); font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; color: var(--muted); cursor: pointer; display: flex; align-items: center; gap: 6px; margin-bottom: 20px; padding: 0; transition: color 0.15s; }
.study-back-btn:hover { color: var(--navy); }
.study-topic-title { font-size: var(--fs-2xl); font-weight: 700; color: var(--dark); margin-bottom: 8px; line-height: 1.2; }
.study-topic-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }
.study-section { border: 2px solid var(--border); margin-bottom: 10px; overflow: hidden; background: var(--white); }
.study-section-inner { display: grid; grid-template-columns: 160px 1fr; gap: 16px; padding: 18px 24px; align-items: start; }
.study-section-label { font-size: var(--fs-xs); font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--muted); padding-top: 2px; }
.study-section-text { font-size: var(--fs-sm); color: var(--dark); line-height: 1.75; }
.study-section.kr-s { background: #F0F4FF; border-color: var(--navy); }
.study-section.kr-s .study-section-text { color: var(--navy); }
.study-sources { margin-top: 16px; padding: 18px 24px; border: 2px solid var(--border); background: var(--bg); }
.study-sources-title { font-size: var(--fs-xs); font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.study-sources-list { display: flex; flex-wrap: wrap; gap: 8px; }
.study-source-link { font-size: var(--fs-xs); font-weight: 700; color: var(--navy); border: 1px solid rgba(8,24,123,0.3); padding: 5px 12px; transition: all 0.15s; }
.study-source-link:hover { background: var(--navy); color: var(--yellow); }
.study-gen-btn { margin-top: 12px; }

/* Generator — sources block */
.topic-sources { padding: 14px 32px 20px; border-top: 1px solid var(--border); background: var(--bg); }
.topic-sources-title { font-size: var(--fs-xs); font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.topic-sources-list { display: flex; flex-wrap: wrap; gap: 8px; }
.topic-source-link { font-size: var(--fs-xs); font-weight: 700; color: var(--navy); border: 1px solid rgba(8,24,123,0.25); padding: 4px 10px; transition: all 0.15s; text-decoration: none; }
.topic-source-link:hover { background: var(--navy); color: var(--yellow); }

/* ── АДАПТИВ study page ── */
@media (max-width: 1024px) {
  .study-layout { grid-template-columns: 200px 1fr; }
  .study-content { padding: 32px 32px; }
}
@media (max-width: 768px) {
  .study-layout { grid-template-columns: 1fr; }
  .study-sidebar { display: none; }
  .study-sidebar-mobile-wrap { display: block; }
  .study-content { padding: 24px 20px; }
  .study-cards-grid { grid-template-columns: 1fr; }
  .study-card { border-right: none !important; }
  .study-section-inner { grid-template-columns: 1fr; gap: 6px; }
  .topic-sources { padding: 12px 20px 16px; }
  .study-section-text table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .algo-box { padding: 12px 14px; font-size: 12px; }
}
@media (max-width: 480px) {
  .study-content { padding: 16px; }
  .study-page-header { padding: 28px 16px; }
}

/* ── АДАПТИВ: смартфон малый (≤480px) ── */
@media (max-width: 480px) {
  /* footer-bottom: stack vertically and center */
  .footer-bottom { justify-content: center; flex-direction: column; text-align: center; gap: 6px; }

  /* ext-search: input wraps below on very narrow screens */
  .ext-search-row { flex-wrap: wrap; }
  .ext-search-row .ext-search-input { width: 100%; }
  .ext-search-row .btn { width: 100%; justify-content: center; }
  .hero-stats { grid-template-columns: 1fr; }
  .hero-stat-num { font-size: var(--fs-xl); }
  .hero-stat-label { font-size: var(--fs-base); }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .section-title { font-size: var(--fs-xl); }
  .cta-title { font-size: var(--fs-xl); }
  .pricing-price { font-size: var(--fs-xl); }
  .about-stats-grid { grid-template-columns: 1fr; }
  .about-stat-num { font-size: var(--fs-2xl); }
  .plan-grid { grid-template-columns: 1fr; }
  .name-row { grid-template-columns: 1fr; }
  .blog-featured-grid { grid-template-columns: 1fr !important; }
  .pg-sec    { padding: 40px 16px; }
  .pg-sec-sm { padding: 32px 16px; }
  .pg-hero   { padding: 40px 16px; }
  .nav { padding: 0 16px; }
  .how-left  { padding: 40px 16px; }
  .how-right { padding: 40px 16px; }
  .gen-wrap  { padding: 28px 16px; }
  .gen-page-header { padding: 24px 16px; }
  .about-hero { padding: 36px 16px; }
  .footer { padding: 28px 16px; }
  .footer-bottom { padding: 12px 16px; }
}