/* ─────────────────────────────────────────────
   Qun Shop — landing styles
   ───────────────────────────────────────────── */

:root{
  --bg:          #0a0b0e;
  --bg-2:        #101218;
  --surface:     rgba(255,255,255,0.04);
  --border:      rgba(255,255,255,0.08);
  --border-2:    rgba(255,255,255,0.14);
  --text:        #ffffff;
  --text-dim:    #9098a8;
  --text-mute:   #6a7184;
  --accent:      #7B61FF;
  --accent-2:    #5b3df0;
  --green:       #00C896;
  --orange:      #f7931a;
  --blue:        #0098ea;
  --max:         1200px;
  --radius:      16px;
  --radius-sm:   10px;
  --shadow:      0 20px 60px -20px rgba(0,0,0,0.6);
}

*,
*::before,
*::after{ box-sizing:border-box; }

html,body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:'Inter', system-ui, -apple-system, sans-serif;
  font-size:16px;
  line-height:1.5;
  overscroll-behavior:none;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

button,a,input{
  -webkit-tap-highlight-color:transparent;
}

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

input,button{
  font-family:inherit;
}

.container{
  max-width:var(--max);
  margin:0 auto;
  padding:0 24px;
  width:100%;
}

/* ───────── Background particles ───────── */
.bg-particles{
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(circle at 20% 10%, rgba(123,97,255,0.18), transparent 40%),
    radial-gradient(circle at 80% 30%, rgba(0,200,150,0.10), transparent 45%),
    radial-gradient(circle at 50% 90%, rgba(123,97,255,0.10), transparent 50%);
  background-attachment:fixed;
}
.bg-particles::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size:60px 60px;
  mask-image:radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse at center, black 30%, transparent 75%);
}

body > *:not(.bg-particles){ position:relative; z-index:1; }

/* ───────── Glass utility ───────── */
.glass{
  background:var(--surface);
  border:1px solid var(--border);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-radius:var(--radius);
}

/* ───────── Navbar ───────── */
.navbar{
  position:sticky;
  top:0;
  z-index:50;
  transition:background .25s ease, border-color .25s ease, backdrop-filter .25s ease;
  border-bottom:1px solid transparent;
}
.navbar.scrolled{
  background:rgba(10,11,14,0.7);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom-color:var(--border);
}
.nav-inner{
  max-width:var(--max);
  margin:0 auto;
  padding:14px 24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}

.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  font-size:18px;
  letter-spacing:-0.01em;
}
.logo-icon{
  display:inline-grid;
  place-items:center;
  width:28px;
  height:28px;
  border-radius:8px;
  background:linear-gradient(135deg, var(--accent), var(--accent-2));
  color:#fff;
  font-size:14px;
  box-shadow:0 6px 18px -6px rgba(123,97,255,0.7);
}

.nav-links{
  display:flex;
  align-items:center;
  gap:32px;
}
.nav-links > a{
  font-size:14px;
  font-weight:500;
  color:var(--text-dim);
  transition:color .15s ease;
  padding:8px 0;
}
.nav-links > a:hover{ color:var(--text); }

.lang-switch{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 10px;
  border:1px solid var(--border);
  border-radius:999px;
  background:rgba(255,255,255,0.02);
}
.lang-btn{
  background:transparent;
  border:0;
  color:var(--text-mute);
  font-size:13px;
  font-weight:600;
  cursor:pointer;
  padding:4px 8px;
  border-radius:999px;
  min-height:32px;
  transition:color .15s ease, background .15s ease;
}
.lang-btn:hover{ color:var(--text); }
.lang-btn.active{
  color:#fff;
  background:var(--accent);
}
.lang-sep{ color:var(--text-mute); font-size:13px; }

.hamburger{
  display:none;
  background:transparent;
  border:1px solid var(--border);
  border-radius:10px;
  width:44px;
  height:44px;
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
}
.hamburger span{
  display:block;
  width:18px;
  height:2px;
  background:#fff;
  border-radius:2px;
  transition:transform .2s ease, opacity .2s ease;
}
.hamburger.open span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2){ opacity:0; }
.hamburger.open span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

/* ───────── Hero ───────── */
.hero{
  padding:80px 0 40px;
  text-align:center;
}
.hero-title{
  font-size:clamp(36px, 6vw, 64px);
  font-weight:800;
  letter-spacing:-0.03em;
  line-height:1.05;
  margin:0 0 18px;
  background:linear-gradient(180deg, #fff 0%, #b9bdcc 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-sub{
  font-size:clamp(15px, 2vw, 18px);
  color:var(--text-dim);
  max-width:560px;
  margin:0 auto;
}

/* ───────── Converter ───────── */
.converter-section{
  padding:24px 0 80px;
}
.converter{
  max-width:520px;
  margin:0 auto;
  padding:28px;
  box-shadow:var(--shadow);
}

.conv-row + .conv-row{ margin-top:14px; }

.conv-label{
  display:block;
  font-size:12px;
  text-transform:uppercase;
  letter-spacing:0.08em;
  color:var(--text-mute);
  margin-bottom:8px;
}
.conv-input-row{
  display:flex;
  align-items:stretch;
  gap:10px;
  background:rgba(255,255,255,0.03);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:8px;
  transition:border-color .15s ease;
}
.conv-input-row:focus-within{ border-color:var(--accent); }

.conv-amount{
  flex:1;
  min-width:0;
  background:transparent;
  border:0;
  outline:0;
  color:#fff;
  font-size:22px;
  font-weight:600;
  padding:10px 12px;
}
.conv-amount::-webkit-outer-spin-button,
.conv-amount::-webkit-inner-spin-button{ -webkit-appearance:none; margin:0; }

/* Custom dropdown */
.conv-select-wrap{ position:relative; }
.conv-select{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(255,255,255,0.05);
  border:1px solid var(--border);
  color:#fff;
  border-radius:10px;
  padding:8px 12px;
  min-height:48px;
  font-weight:600;
  cursor:pointer;
  transition:background .15s ease, border-color .15s ease;
}
.conv-select:hover{ background:rgba(255,255,255,0.08); }
.conv-select .caret{ color:var(--text-mute); font-size:12px; margin-left:2px; }

.conv-dropdown{
  position:absolute;
  top:calc(100% + 6px);
  right:0;
  min-width:160px;
  list-style:none;
  margin:0;
  padding:6px;
  background:#16181f;
  border:1px solid var(--border-2);
  border-radius:12px;
  box-shadow:0 16px 40px rgba(0,0,0,0.5);
  display:none;
  z-index:20;
}
.conv-dropdown.open{ display:block; }
.conv-dropdown li{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 12px;
  border-radius:8px;
  cursor:pointer;
  font-weight:600;
  font-size:14px;
  min-height:44px;
}
.conv-dropdown li:hover,
.conv-dropdown li[aria-selected="true"]{ background:rgba(255,255,255,0.06); }
.conv-dropdown li[aria-disabled="true"]{
  opacity:0.4;
  cursor:not-allowed;
}

/* Coin icons */
.coin-icon{
  width:24px;
  height:24px;
  border-radius:50%;
  display:inline-grid;
  place-items:center;
  font-size:10px;
  font-weight:700;
  color:#fff;
  letter-spacing:-0.02em;
  flex-shrink:0;
}
.coin-ton{  background:linear-gradient(135deg, #0098ea, #0070b3); }
.coin-btc{  background:linear-gradient(135deg, #f7931a, #c9700f); }
.coin-eth{  background:linear-gradient(135deg, #7B61FF, #4d36cf); }
.coin-usdt{ background:linear-gradient(135deg, #26a17b, #138360); }

/* Swap */
.swap-row{
  display:flex;
  justify-content:center;
  margin:14px 0;
}
.swap-btn{
  width:48px;
  height:48px;
  border-radius:50%;
  background:linear-gradient(135deg, var(--accent), var(--accent-2));
  color:#fff;
  border:4px solid var(--bg);
  cursor:pointer;
  display:grid;
  place-items:center;
  transition:transform .35s ease, box-shadow .2s ease;
  box-shadow:0 8px 24px -8px rgba(123,97,255,0.7);
}
.swap-btn:hover{ box-shadow:0 12px 28px -8px rgba(123,97,255,0.9); }
.swap-btn.spin{ transform:rotate(180deg); }

/* Rate display */
.rate-display{
  margin-top:18px;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  font-size:14px;
  color:var(--text-dim);
  min-height:22px;
}
.rate-dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--green);
  box-shadow:0 0 0 0 rgba(0,200,150,0.6);
  animation:pulse 1.6s ease-out infinite;
}
.rate-display.stale .rate-dot{
  background:#f5a623;
  animation:none;
}
.rate-display.stale{ color:#f5a623; }
@keyframes pulse{
  0%   { box-shadow:0 0 0 0 rgba(0,200,150,0.6); }
  70%  { box-shadow:0 0 0 10px rgba(0,200,150,0); }
  100% { box-shadow:0 0 0 0 rgba(0,200,150,0); }
}

/* CTA */
.cta-btn{
  display:flex;
  align-items:center;
  justify-content:center;
  width:100%;
  height:56px;
  margin-top:20px;
  border-radius:14px;
  background:linear-gradient(135deg, var(--accent), var(--accent-2));
  color:#fff;
  font-size:16px;
  font-weight:700;
  letter-spacing:-0.01em;
  cursor:pointer;
  transition:transform .15s ease, box-shadow .2s ease, filter .15s ease;
  box-shadow:0 12px 30px -10px rgba(123,97,255,0.8);
}
.cta-btn:hover{ filter:brightness(1.08); }
.cta-btn:active{ transform:translateY(1px); }

.cta-sub{
  text-align:center;
  margin:12px 0 0;
  font-size:12px;
  color:var(--text-mute);
  letter-spacing:0.08em;
  text-transform:uppercase;
}

/* ───────── Stats ───────── */
.stats-section{ padding:30px 0 60px; }
.stats-grid{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:16px;
  max-width:760px;
  margin:0 auto;
}
.stat-card{
  padding:28px 20px;
  text-align:center;
  transition:transform .2s ease, border-color .2s ease;
}
.stat-card:hover{
  transform:translateY(-3px);
  border-color:var(--border-2);
}
.stat-value{
  font-size:clamp(28px, 4vw, 40px);
  font-weight:800;
  letter-spacing:-0.02em;
  background:linear-gradient(135deg, #fff, var(--accent));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  margin-bottom:6px;
}
.stat-label{
  font-size:13px;
  color:var(--text-dim);
  text-transform:uppercase;
  letter-spacing:0.08em;
}

/* ───────── Sections ───────── */
.section-title{
  font-size:clamp(28px, 4vw, 40px);
  font-weight:700;
  letter-spacing:-0.02em;
  text-align:center;
  margin:0 0 40px;
}

.how-section{ padding:60px 0; }
.how-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:20px;
}
.how-card{
  padding:28px;
  transition:transform .2s ease, border-color .2s ease;
}
.how-card:hover{
  transform:translateY(-4px);
  border-color:var(--border-2);
}
.how-icon{
  width:48px;
  height:48px;
  border-radius:12px;
  background:rgba(123,97,255,0.12);
  color:var(--accent);
  display:grid;
  place-items:center;
  margin-bottom:16px;
}
.how-step{
  font-size:12px;
  font-weight:700;
  color:var(--accent);
  letter-spacing:0.1em;
  margin-bottom:6px;
}
.how-card h3{
  font-size:18px;
  font-weight:600;
  margin:0 0 8px;
  letter-spacing:-0.01em;
}
.how-card p{
  font-size:14px;
  color:var(--text-dim);
  margin:0;
}

/* ───────── FAQ ───────── */
.faq-section{ padding:60px 0 80px; }
.faq-list{
  max-width:760px;
  margin:0 auto;
  display:flex;
  flex-direction:column;
  gap:12px;
}
.faq-item{
  overflow:hidden;
  transition:border-color .2s ease;
}
.faq-item:hover{ border-color:var(--border-2); }
.faq-q{
  width:100%;
  background:transparent;
  border:0;
  color:#fff;
  text-align:left;
  padding:20px 22px;
  min-height:60px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  cursor:pointer;
  font-size:15px;
  font-weight:600;
}
.faq-toggle{
  display:inline-grid;
  place-items:center;
  width:28px;
  height:28px;
  border-radius:50%;
  background:rgba(123,97,255,0.15);
  color:var(--accent);
  font-size:18px;
  flex-shrink:0;
  transition:transform .25s ease;
}
.faq-item.open .faq-toggle{ transform:rotate(45deg); }

.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .35s ease;
}
.faq-a p{
  margin:0;
  padding:0 22px 20px;
  color:var(--text-dim);
  font-size:14px;
  line-height:1.6;
}

/* ───────── Footer ───────── */
.footer{
  border-top:1px solid var(--border);
  padding:40px 0;
  background:linear-gradient(180deg, transparent, rgba(0,0,0,0.4));
}
.footer-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:24px;
}
.footer-tag{
  margin:8px 0 0;
  color:var(--text-mute);
  font-size:13px;
}
.footer-links{
  display:flex;
  list-style:none;
  margin:0;
  padding:0;
  gap:24px;
  justify-content:center;
}
.footer-links a{
  color:var(--text-dim);
  font-size:14px;
  transition:color .15s ease;
}
.footer-links a:hover{ color:#fff; }
.copy{
  text-align:right;
  margin:0;
  color:var(--text-mute);
  font-size:12px;
}

/* ───────── Reveal animation ───────── */
.reveal{
  opacity:0;
  transform:translateY(20px);
  transition:opacity .6s ease, transform .6s ease;
}
.reveal.in-view{
  opacity:1;
  transform:translateY(0);
}

/* ───────── Responsive ───────── */
@media (max-width: 900px){
  .nav-links{
    position:absolute;
    top:100%;
    left:16px;
    right:16px;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:8px;
    background:rgba(16,18,24,0.96);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border:1px solid var(--border);
    border-radius:16px;
    box-shadow:var(--shadow);
    transform:translateY(-10px);
    opacity:0;
    pointer-events:none;
    transition:opacity .2s ease, transform .2s ease;
  }
  .nav-links.open{
    opacity:1;
    transform:translateY(0);
    pointer-events:auto;
  }
  .nav-links > a{
    padding:14px 16px;
    border-radius:10px;
    font-size:15px;
    min-height:48px;
    display:flex;
    align-items:center;
  }
  .nav-links > a:hover{ background:rgba(255,255,255,0.04); }
  .lang-switch{
    margin:8px;
    justify-content:center;
  }
  .hamburger{ display:flex; }

  .footer-inner{
    grid-template-columns:1fr;
    text-align:center;
    gap:20px;
  }
  .footer-links{ flex-wrap:wrap; }
  .copy{ text-align:center; }

  .how-grid,
  .stats-grid{
    grid-template-columns:1fr;
  }
}

@media (max-width: 480px){
  .container{ padding:0 16px; }
  .nav-inner{ padding:12px 16px; }
  .logo-text{ font-size:16px; }

  .hero{ padding:48px 0 24px; }
  .converter{ padding:20px; border-radius:18px; }

  .conv-amount{
    font-size:16px;   /* keep ≥16 — prevents iOS auto-zoom */
    padding:8px 10px;
  }
  .conv-select{
    padding:8px 10px;
    font-size:14px;
  }
  .coin-label{ font-size:13px; }

  .cta-btn{ height:56px; font-size:15px; }

  .stats-section{ padding:20px 0 40px; }
  .stat-card{ padding:22px 16px; }

  .how-section,
  .faq-section{ padding:40px 0; }
  .section-title{ margin-bottom:28px; }

  .faq-q{ font-size:14px; padding:16px 18px; }
  .faq-a p{ padding:0 18px 16px; font-size:13px; }
}