* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --dark: #0f1015;
  --dark-2: #181922;
  --text: #202128;
  --muted: #6e7280;
  --soft: #f4f5f8;
  --white: #fff;
  --line: #e4e6ec;
  --red: #d62828;
  --red-2: #9f1515;
  --gold: #f5bd3b;
  --green: #1eaa59;
  --bad: #d93030;
  --shadow: 0 18px 50px rgba(0,0,0,.10);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: var(--white);
  color: var(--text);
  line-height: 1.65;
}

a { color: inherit; text-decoration: none; }

.header {
  min-height: 100vh;
  color: white;
  background:
    radial-gradient(circle at 15% 25%, rgba(214,40,40,.55), transparent 30%),
    radial-gradient(circle at 85% 65%, rgba(245,189,59,.22), transparent 28%),
    linear-gradient(135deg, #0f1015, #251010 58%, #0f1015);
}

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 76px;
  width: 100%;
  padding-left: max(4%, calc((100% - 1220px) / 2));
  padding-right: max(4%, calc((100% - 1220px) / 2));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(22, 10, 12, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  box-shadow: 0 10px 35px rgba(0,0,0,.22);
}

.logo {
  font-weight: 900;
  font-size: 21px;
  letter-spacing: .6px;
}

.logo span { color: var(--red); }

.nav-links {
  display: flex;
  gap: 15px;
  font-size: 14px;
  color: rgba(255,255,255,.88);
  align-items: center;
  white-space: nowrap;
}

.nav-links a {
  padding: 8px 0;
}

.nav-links a:hover { color: white; }

.menu-btn {
  display: none;
  background: rgba(255,255,255,.08);
  color: white;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 12px;
  padding: 7px 12px;
  font-size: 22px;
}

.hero {
  width: min(1220px, 92%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.35fr .65fr;
  gap: 36px;
  align-items: center;
  min-height: 100vh;
  padding: 112px 0 56px;
}

.badge,
.label {
  display: inline-block;
  color: white;
  background: var(--red);
  padding: 8px 14px;
  border-radius: 999px;
  font-weight: 900;
  font-size: 13px;
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(44px, 8vw, 92px);
  line-height: .98;
  letter-spacing: -3px;
  margin-bottom: 26px;
}

.hero-text {
  color: rgba(255,255,255,.84);
  max-width: 760px;
  font-size: clamp(18px, 2vw, 23px);
  margin-bottom: 30px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  border: none;
  border-radius: 14px;
  padding: 15px 23px;
  font-size: 16px;
  font-weight: 900;
  cursor: pointer;
  display: inline-flex;
  transition: .2s;
}

.btn.primary { background: var(--red); color: white; }
.btn.primary:hover { background: var(--red-2); transform: translateY(-2px); }
.btn.ghost { border: 1px solid rgba(255,255,255,.25); color: white; background: rgba(255,255,255,.08); }
.btn.outline { border: 2px solid var(--dark); color: var(--dark); background: transparent; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }

.hero-panel {
  display: grid;
  gap: 18px;
}

.panel-card {
  padding: 26px;
  border-radius: 26px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.14);
  box-shadow: 0 16px 60px rgba(0,0,0,.18);
}

.panel-card span {
  color: var(--gold);
  font-weight: 900;
}

.panel-card strong {
  display: block;
  font-size: 28px;
  margin: 4px 0;
}

.panel-card p { color: rgba(255,255,255,.75); }

.section {
  padding: 90px 0;
}

.section > * {
  width: min(1220px, 92%);
  margin-left: auto;
  margin-right: auto;
}

.section-head {
  max-width: 860px;
  margin-bottom: 38px;
}

.section-head h2 {
  font-size: clamp(32px, 4vw, 54px);
  line-height: 1.08;
  letter-spacing: -1.4px;
  margin-bottom: 14px;
}

.section-head p {
  color: var(--muted);
  font-size: 18px;
}

.soft { background: var(--soft); }
.dark { background: var(--dark); color: white; }
.red {
  color: white;
  background:
    radial-gradient(circle at 10% 20%, rgba(255,255,255,.16), transparent 28%),
    linear-gradient(135deg, var(--red), #5b0b0b);
}

.dark .section-head p,
.red .section-head p { color: rgba(255,255,255,.78); }

.light-label {
  background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.24);
}

.passport-grid,
.feature-grid,
.level-grid,
.equipment-layout,
.safety-grid,
.practice-grid,
.result-grid,
.future-grid,
.history-grid {
  display: grid;
  gap: 22px;
}

.passport-grid { grid-template-columns: repeat(4, 1fr); }
.feature-grid, .level-grid, .history-grid { grid-template-columns: repeat(3, 1fr); }
.equipment-layout, .safety-grid, .practice-grid, .future-grid { grid-template-columns: repeat(4, 1fr); }
.result-grid { grid-template-columns: repeat(3, 1fr); }

.passport-card,
.feature-card,
.level-card,
.rule-card,
.equipment-card,
.safety-card,
.practice-card,
.result-card,
.future-grid div,
.source-card,
.quiz-box,
.term-output,
.compare-card {
  border-radius: 28px;
  padding: 28px;
}

.passport-card,
.feature-card,
.level-card,
.rule-card,
.equipment-card,
.result-card,
.future-grid div,
.source-card,
.quiz-box,
.term-output,
.compare-card {
  background: white;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.passport-card h3,
.feature-card h3,
.level-card h3,
.rule-card h3,
.equipment-card h3,
.safety-card h3,
.practice-card h3,
.result-card h3,
.future-grid h3,
.source-card h3 {
  font-size: 23px;
  margin-bottom: 10px;
}

.icon,
.equipment-icon {
  font-size: 36px;
  margin-bottom: 12px;
}

.tasks-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.task {
  padding: 24px;
  border-radius: 24px;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.12);
}

.task b {
  display: block;
  color: var(--gold);
  font-size: 28px;
  margin-bottom: 8px;
}

.route {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.route-step {
  padding: 22px;
  border-radius: 24px;
  background: var(--soft);
  border: 1px solid var(--line);
}

.route-step span {
  width: 42px;
  height: 42px;
  background: var(--red);
  color: white;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 900;
  margin-bottom: 14px;
}

.route-step h3 { font-size: 20px; margin-bottom: 8px; }

.history-grid article {
  padding: 28px;
  border-radius: 26px;
  background: rgba(255,255,255,.11);
  border: 1px solid rgba(255,255,255,.17);
}

.level-card { position: relative; overflow: hidden; }
.level-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 7px;
  background: var(--red);
}

.level-badge {
  display: inline-block;
  background: var(--red);
  color: white;
  padding: 7px 12px;
  border-radius: 999px;
  font-weight: 900;
  margin-bottom: 16px;
}

.level-card ul {
  margin-top: 16px;
  padding-left: 20px;
}

.rules-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 18px;
}

.rule-card.big {
  grid-row: span 2;
  background: var(--dark);
  color: white;
}

.safety-card,
.practice-card {
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.14);
}

.safety-card b {
  color: var(--gold);
  font-size: 28px;
}

.term-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.term-buttons button {
  padding: 12px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: white;
  cursor: pointer;
  font-weight: 900;
  transition: .2s;
}

.term-buttons button:hover,
.term-buttons button.active {
  background: var(--red);
  color: white;
  border-color: var(--red);
}

.term-output {
  margin-top: 22px;
  font-size: 20px;
  border-left: 8px solid var(--red);
}

.flash-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
}

.flash-card {
  min-height: 190px;
  perspective: 1000px;
  cursor: pointer;
}

.flash-card.flipped .flash-inner {
  transform: rotateY(180deg);
}

.flash-inner {
  width: 100%;
  height: 100%;
  min-height: 190px;
  position: relative;
  transform-style: preserve-3d;
  transition: .55s;
}

.front,
.back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: 24px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 18px;
  font-weight: 900;
  font-size: 18px;
}

.front {
  background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.2);
}

.back {
  background: white;
  color: var(--dark);
  transform: rotateY(180deg);
}

.practice-card p {
  color: var(--muted);
  margin-bottom: 14px;
}

.practice-card button {
  width: 100%;
  padding: 13px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fafafa;
  text-align: left;
  margin-top: 10px;
  cursor: pointer;
}

.practice-card button.correct {
  background: #e8f8ee;
  border-color: var(--green);
}

.practice-card button.wrong {
  background: #ffeaea;
  border-color: var(--bad);
}

.feedback {
  min-height: 24px;
  margin-top: 12px;
  font-weight: 900;
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.compare-card ul {
  padding-left: 20px;
  margin-top: 10px;
}

.compare-card.before {
  border-left: 8px solid var(--bad);
}

.compare-card.after {
  border-left: 8px solid var(--green);
}

.quiz-box {
  max-width: 980px;
}

.quiz-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-weight: 900;
  margin-bottom: 10px;
}

.progress {
  height: 12px;
  background: #ececec;
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 26px;
}

#progressBar {
  height: 100%;
  width: 0%;
  background: var(--red);
  transition: .25s;
}

#questionText {
  font-size: 28px;
  line-height: 1.25;
  margin-bottom: 20px;
}

.answers {
  display: grid;
  gap: 12px;
}

.answer {
  border: 2px solid var(--line);
  background: #fafafa;
  padding: 15px;
  border-radius: 15px;
  cursor: pointer;
  text-align: left;
  font-size: 16px;
}

.answer:hover {
  border-color: var(--red);
}

.answer.correct {
  background: #e8f8ee;
  border-color: var(--green);
}

.answer.wrong {
  background: #ffeaea;
  border-color: var(--bad);
}

.quiz-actions {
  display: flex;
  gap: 12px;
  margin-top: 22px;
  flex-wrap: wrap;
}

.result {
  margin-top: 22px;
  padding: 24px;
  background: var(--soft);
  border-left: 8px solid var(--red);
  border-radius: 20px;
}

.result-card {
  box-shadow: none;
}

.result-card strong {
  display: block;
  color: var(--red);
  font-size: 28px;
  margin-bottom: 10px;
}

.device-row {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 26px;
  flex-wrap: wrap;
}

.device {
  background: var(--dark);
  padding: 14px;
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.device div {
  border-radius: 18px;
  color: white;
  background: linear-gradient(135deg, var(--red), var(--dark));
  display: grid;
  place-items: center;
  text-align: center;
  padding: 20px;
}

.device b {
  display: block;
  font-size: 24px;
}

.device span {
  color: rgba(255,255,255,.75);
}

.desktop { width: 430px; height: 250px; }
.desktop div { height: 100%; }
.tablet { width: 230px; height: 290px; }
.tablet div { height: 100%; }
.phone { width: 130px; height: 255px; }
.phone div { height: 100%; }

.conclusion p {
  max-width: 920px;
  font-size: 20px;
  margin-bottom: 24px;
}

.footer {
  background: var(--dark);
  color: white;
  padding: 30px 20px;
  text-align: center;
}

@media (max-width: 1100px) {
  .nav-links {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    background: rgba(15,16,21,.98);
    padding: 20px 4%;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    white-space: normal;
    max-height: calc(100vh - 76px);
    overflow-y: auto;
  }

  .nav-links.open { display: flex; }
  .menu-btn { display: block; }

  .hero {
    grid-template-columns: 1fr;
  }

  .passport-grid,
  .tasks-grid,
  .equipment-layout,
  .safety-grid,
  .practice-grid,
  .future-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .route,
  .flash-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .result-grid,
  .feature-grid,
  .level-grid,
  .history-grid {
    grid-template-columns: 1fr 1fr;
  }

  .rules-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .hero h1 {
    letter-spacing: -1.2px;
  }

  .passport-grid,
  .feature-grid,
  .tasks-grid,
  .route,
  .history-grid,
  .level-grid,
  .rules-grid,
  .equipment-layout,
  .safety-grid,
  .flash-grid,
  .practice-grid,
  .compare-grid,
  .result-grid,
  .future-grid {
    grid-template-columns: 1fr;
  }

  .quiz-meta {
    flex-direction: column;
  }

  .section {
    padding: 70px 0;
  }

  .desktop { width: 100%; }
}


/* Фото и визуальные блоки */
.hero-photo {
  width: 100%;
  display: block;
  border-radius: 30px;
  border: 1px solid rgba(255,255,255,.18);
  box-shadow: 0 22px 70px rgba(0,0,0,.25);
  object-fit: cover;
  aspect-ratio: 16 / 10;
}

.section-image {
  width: min(1220px, 92%);
  margin: -8px auto 32px;
}

.section-image img {
  width: 100%;
  display: block;
  border-radius: 30px;
  box-shadow: var(--shadow);
  object-fit: cover;
  max-height: 430px;
}

.photo-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr 1fr;
  gap: 22px;
}

.photo-card {
  margin: 0;
  background: white;
  border: 1px solid var(--line);
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.photo-card.large {
  grid-row: span 2;
}

.photo-card img {
  width: 100%;
  height: 230px;
  object-fit: cover;
  display: block;
}

.photo-card.large img {
  height: 520px;
}

.photo-card figcaption {
  padding: 22px;
}

.photo-card h3 {
  font-size: 23px;
  margin-bottom: 8px;
}

.photo-card p {
  color: var(--muted);
}

@media (max-width: 1100px) {
  .photo-grid {
    grid-template-columns: 1fr 1fr;
  }
  .photo-card.large {
    grid-row: auto;
  }
  .photo-card.large img {
    height: 260px;
  }
}

@media (max-width: 720px) {
  .photo-grid {
    grid-template-columns: 1fr;
  }
}


/* Реальные фотографии */
.hero-photo,
.section-image img,
.photo-card img {
  filter: saturate(1.08) contrast(1.05);
}

.photo-card figcaption {
  min-height: 135px;
}

.photo-credit {
  margin-top: 18px;
}


/* Улучшение длинного блока истории */
.history-grid article p + p {
  margin-top: 12px;
}


/* Больше информации в карточке «История самбо» */
.photo-card figcaption p + p {
  margin-top: 10px;
}

.photo-card.large figcaption {
  min-height: 220px;
}

.photo-card.large img {
  object-position: center center;
}