/* ===== COMMON.CSS — Shared styles for all Catnip pages ===== */

/* ===== Reset & base ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

/* ===== Цвета ===== */
:root {
  --blue: #009BFF;
  --blue-dark: #0077CC;
  --black: #0A0A0A;
  --white: #FFFFFF;
  --cream: #FFF8E7;
  --green: #007F2D;
  --red: #C42424;
  --bg: var(--blue);
  --text: var(--black);
  --card: var(--cream);
  --border: var(--black);
  --muted-bg: var(--black);
  --muted-fg: var(--blue);
}
body.dark {
  --bg: #0A0A0A;
  --text: #F5F5F5;
  --card: #1A1A1A;
  --border: #009BFF;
  --muted-bg: #009BFF;
  --muted-fg: #0A0A0A;
}

body {
  font-family: 'Nunito', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  transition: background .3s ease, color .3s ease;
}
body > footer { margin-top: auto; }
body[lang="zh"] { font-family: 'Noto Sans SC', 'Nunito', system-ui, sans-serif; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 2; }

.bg-decor { position: absolute; top: 0; left: 0; right: 0; bottom: 0; pointer-events: none; overflow: hidden; z-index: 0; }
.bg-decor span { position: absolute; color: var(--text); opacity: 0.12; font-size: 32px; }
.bg-decor span.big { font-size: 72px; }
.bg-decor span.med { font-size: 48px; }

/* ===== Navigation ===== */
nav {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px 0; border-bottom: 2px solid var(--border);
  position: relative; z-index: 2; gap: 16px;
}
.logo { display: flex; align-items: center; gap: 12px; font-weight: 900; font-size: 22px; color: var(--text); letter-spacing: -0.5px; text-decoration: none; }
.logo-img { width: 52px; height: 52px; border-radius: 12px; display: block; object-fit: cover; }
.nav-right { display: flex; align-items: center; gap: 18px; }
.nav-links { display: flex; gap: 24px; font-size: 15px; font-weight: 700; color: var(--text); }
.nav-links a { color: inherit; text-decoration: none; transition: opacity .2s; }
.nav-links a:hover { opacity: 0.6; }
.nav-links a.active { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 4px; }

/* ===== Theme toggle ===== */
.theme-toggle {
  background: var(--black); color: var(--blue);
  border: 2px solid var(--black); border-radius: 50%;
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; font-size: 16px;
  transition: transform .2s, box-shadow .2s;
}
.theme-toggle:hover { transform: translate(-2px, -2px); box-shadow: 3px 3px 0 var(--black); }
body.dark .theme-toggle { background: var(--blue); color: var(--black); border-color: var(--blue); }
body.dark .theme-toggle:hover { box-shadow: 3px 3px 0 var(--blue); }

/* ===== Language switcher ===== */
.lang-switch { display: flex; background: var(--black); border-radius: 999px; padding: 4px; gap: 2px; }
.lang-btn { background: transparent; color: var(--blue); border: none; cursor: pointer; padding: 6px 12px; border-radius: 999px; font-weight: 800; font-size: 12px; font-family: inherit; transition: background .2s, color .2s; letter-spacing: 0.5px; }
.lang-btn:hover { color: var(--white); }
.lang-btn.active { background: var(--blue); color: var(--black); }
body.dark .lang-switch { background: var(--blue); }
body.dark .lang-btn { color: var(--black); }
body.dark .lang-btn:hover { color: var(--black); opacity: 0.7; }
body.dark .lang-btn.active { background: var(--black); color: var(--blue); }

/* ===== Buttons (shared) ===== */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 16px 30px; border-radius: 999px;
  font-weight: 800; font-size: 16px; text-decoration: none;
  transition: transform .15s, box-shadow .15s;
  border: 2px solid var(--black); cursor: pointer;
  font-family: inherit;
}
.btn-primary { background: var(--black); color: var(--blue); box-shadow: 5px 5px 0 var(--black); }
.btn-primary:hover { transform: translate(-2px, -2px); box-shadow: 7px 7px 0 var(--black); }
.btn-ghost { background: var(--blue); color: var(--black); box-shadow: 5px 5px 0 var(--black); }
.btn-ghost:hover { transform: translate(-2px, -2px); box-shadow: 7px 7px 0 var(--black); }
body.dark .btn { border-color: var(--blue); }
body.dark .btn-primary { background: var(--blue); color: var(--black); box-shadow: 5px 5px 0 var(--blue); }
body.dark .btn-primary:hover { box-shadow: 7px 7px 0 var(--blue); }
body.dark .btn-ghost { background: transparent; color: var(--blue); box-shadow: 5px 5px 0 var(--blue); }
body.dark .btn-ghost:hover { box-shadow: 7px 7px 0 var(--blue); }

/* ===== Badge ===== */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--black); color: var(--blue);
  font-size: 13px; font-weight: 800; padding: 8px 18px;
  border-radius: 999px; margin-bottom: 28px;
  text-transform: uppercase; letter-spacing: 0.5px;
}
body.dark .badge { background: var(--blue); color: var(--black); }

/* ===== Section sub-title ===== */
.section-sub {
  text-align: center; font-size: 15px; font-weight: 700;
  margin-bottom: 40px; opacity: 0.8; color: var(--text);
}

/* ===== Footer ===== */
footer { padding: 28px 0; background: var(--black); color: var(--blue); font-size: 14px; font-weight: 700; border-top: 2px solid var(--blue-dark); }
footer .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
footer a { color: inherit; text-decoration: none; }
footer a:hover { color: var(--white); }

/* ===== Reveal scroll animation ===== */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .8s ease, transform .8s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== Burger menu (mobile) ===== */
.burger {
  display: none;
  background: var(--black); color: var(--blue);
  border: 2px solid var(--black); border-radius: 10px;
  width: 38px; height: 38px;
  align-items: center; justify-content: center;
  cursor: pointer; font-size: 20px;
  transition: transform .2s;
  padding: 0;
}
.burger:hover { transform: scale(1.05); }
body.dark .burger { background: var(--blue); color: var(--black); border-color: var(--blue); }

@media (max-width: 700px) {
  .burger { display: flex; }
}

/* ===== Mobile nav overlay ===== */
.mobile-nav {
  position: fixed; inset: 0;
  background: var(--black);
  z-index: 9999;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 0;
  opacity: 0; pointer-events: none;
  transition: opacity .3s ease;
}
.mobile-nav.open { opacity: 1; pointer-events: all; }
body.dark .mobile-nav { background: #0A0A0A; }

.mobile-nav-close {
  position: absolute; top: 20px; right: 24px;
  background: none; border: none; color: var(--blue);
  font-size: 32px; cursor: pointer;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
}

.mobile-nav a {
  color: var(--blue); text-decoration: none;
  font-size: 28px; font-weight: 900;
  padding: 18px 40px;
  transition: opacity .2s;
  letter-spacing: -0.5px;
}
.mobile-nav a:hover { opacity: 0.6; }

.mobile-nav-footer {
  position: absolute; bottom: 40px;
  display: flex; gap: 12px; align-items: center;
}

/* ===== Scroll-to-top button ===== */
.scroll-top {
  position: fixed; bottom: 28px; right: 28px;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--black); color: var(--blue);
  border: 3px solid var(--black);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; cursor: pointer;
  box-shadow: 4px 4px 0 var(--black);
  transition: transform .2s, box-shadow .2s, opacity .3s;
  opacity: 0; pointer-events: none;
  z-index: 999;
}
.scroll-top.visible { opacity: 1; pointer-events: all; }
.scroll-top:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--black); }
body.dark .scroll-top {
  background: var(--blue); color: var(--black);
  border-color: var(--blue); box-shadow: 4px 4px 0 var(--blue);
}
body.dark .scroll-top:hover { box-shadow: 6px 6px 0 var(--blue); }

/* ===== Skeleton loader ===== */
.skeleton {
  background: linear-gradient(90deg, #e0e0e0 25%, #f0f0f0 50%, #e0e0e0 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: 8px;
}
body.dark .skeleton {
  background: linear-gradient(90deg, #2a2a2a 25%, #3a3a3a 50%, #2a2a2a 75%);
  background-size: 200% 100%;
}
@keyframes skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.skeleton-price { height: 32px; width: 120px; margin-bottom: 8px; }
.skeleton-change { height: 18px; width: 100px; }
.skeleton-meta { height: 14px; width: 100%; margin-top: 12px; }

/* ===== Crypto converter ===== */
.converter-section { padding: 40px 0 0; }
.converter-card {
  max-width: 500px; margin: 0 auto;
  background: var(--cream); border: 3px solid var(--black);
  border-radius: 18px; padding: 28px;
  box-shadow: 6px 6px 0 var(--black);
}
body.dark .converter-card {
  background: #1A1A1A; color: #F5F5F5;
  border-color: var(--blue); box-shadow: 6px 6px 0 var(--blue);
}
.converter-title {
  font-size: 18px; font-weight: 900; text-align: center;
  margin-bottom: 20px; letter-spacing: -0.3px;
}
.converter-row {
  display: flex; gap: 12px; align-items: center;
  margin-bottom: 14px; flex-wrap: wrap;
}
.converter-input {
  flex: 1; min-width: 120px;
  background: var(--white); border: 2.5px solid var(--black);
  border-radius: 12px; padding: 12px 16px;
  font-family: inherit; font-size: 18px; font-weight: 800;
  color: var(--black);
  outline: none; transition: box-shadow .15s;
  font-variant-numeric: tabular-nums;
}
.converter-input:focus { box-shadow: 3px 3px 0 var(--black); }
body.dark .converter-input {
  background: #2A2A2A; color: #F5F5F5; border-color: var(--blue);
}
body.dark .converter-input:focus { box-shadow: 3px 3px 0 var(--blue); }
.converter-select {
  background: var(--black); color: var(--blue);
  border: 2.5px solid var(--black); border-radius: 12px;
  padding: 12px 16px; font-family: inherit;
  font-weight: 800; font-size: 14px; cursor: pointer;
  outline: none;
}
body.dark .converter-select {
  background: var(--blue); color: var(--black);
  border-color: var(--blue);
}
.converter-swap {
  background: var(--blue); color: var(--black);
  border: 2.5px solid var(--black); border-radius: 50%;
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; font-size: 18px;
  margin: 0 auto; transition: transform .2s;
}
.converter-swap:hover { transform: rotate(180deg); }
body.dark .converter-swap { border-color: var(--blue); }
.converter-result {
  text-align: center; font-size: 22px; font-weight: 900;
  padding: 10px 0 0; letter-spacing: -0.5px;
  font-variant-numeric: tabular-nums;
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ===== Shared responsive ===== */
@media (max-width: 700px) {
  .nav-links { display: none; }
  nav { padding: 16px 0; gap: 10px; }
  .bg-decor span.big { font-size: 48px; }
  /* Уменьшаем боковые отступы контейнера на узких экранах */
  .container { padding: 0 16px; }
  /* Запрещаем горизонтальный скролл на самом html элементе тоже —
     overflow-x:hidden на body не всегда хватает на iOS Safari */
  html { overflow-x: hidden; max-width: 100%; }
  /* Защита от внутреннего переполнения в grid/flex детях */
  .crypto-card, .community-card, .about-card, .stat-card { min-width: 0; }
}