/* ───────────────────────────────────────────────
   Liquid-glass дизайн-система (mobile-first)
   Используется страницей капчи (/app) и домом (/home)
   ─────────────────────────────────────────────── */
:root {
  --tg-text: var(--tg-theme-text-color, #f4f6fb);
  --tg-hint: var(--tg-theme-hint-color, #9aa4b8);
  --tg-link: var(--tg-theme-link-color, #6fd3ff);
  --tg-button-text: #ffffff;

  /* фирменные акценты */
  --accent-1: #7c5cff;
  --accent-2: #22d3ee;
  --accent-3: #ff6bd6;
  --accent-grad: linear-gradient(135deg, var(--accent-1), var(--accent-2) 60%, var(--accent-3));

  /* liquid glass */
  --glass-bg: linear-gradient(135deg, rgba(255,255,255,0.12), rgba(255,255,255,0.035));
  --glass-brd: rgba(255,255,255,0.16);
  --glass-shadow: 0 14px 44px rgba(0,0,0,0.42);
  --glass-inset: inset 0 1px 0 rgba(255,255,255,0.34), inset 0 -1px 1px rgba(255,255,255,0.05);
  --blur: 22px;

  --radius: 26px;
  --radius-sm: 16px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { height: 100%; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100dvh;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
  color: var(--tg-text);
  background:
    radial-gradient(1200px 800px at 50% -10%, #1b2140 0%, transparent 60%),
    linear-gradient(180deg, #0b0d18 0%, #070810 100%);
  background-attachment: fixed;
  display: flex; align-items: center; justify-content: center;
  overflow-x: hidden;
  overscroll-behavior-y: contain;
  -webkit-font-smoothing: antialiased;
}

/* анимированные «жидкие» блобы фона */
.bg-orbs { position: fixed; inset: 0; overflow: hidden; z-index: 0; pointer-events: none; }
.bg-orbs span {
  position: absolute; border-radius: 50%;
  filter: blur(80px); opacity: .5;
  animation: float 16s ease-in-out infinite;
  will-change: transform;
}
.bg-orbs span:nth-child(1){ width:62vw;height:62vw;background:var(--accent-1);top:-18vw;left:-16vw; }
.bg-orbs span:nth-child(2){ width:52vw;height:52vw;background:var(--accent-2);bottom:-14vw;right:-12vw;animation-delay:-5s; }
.bg-orbs span:nth-child(3){ width:46vw;height:46vw;background:var(--accent-3);top:38%;left:48%;animation-delay:-9s;opacity:.4; }
@keyframes float {
  0%,100% { transform: translate(0,0) scale(1); }
  33% { transform: translate(6vw,-5vw) scale(1.08); }
  66% { transform: translate(-5vw,4vw) scale(.94); }
}
@media (prefers-reduced-motion: reduce) { .bg-orbs span { animation: none; } }

/* стеклянная утилита */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(180%);
  border: 1px solid var(--glass-brd);
  box-shadow: var(--glass-shadow), var(--glass-inset);
}

/* ───────────────── Карточка капчи (/app) ───────────────── */
.card {
  position: relative; z-index: 1;
  width: min(92vw, 440px);
  margin: max(16px, var(--safe-top)) 0 max(16px, var(--safe-bottom));
  padding: clamp(22px, 6vw, 30px) clamp(18px, 5vw, 26px);
  border-radius: var(--radius);
  text-align: center;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(180%);
  border: 1px solid var(--glass-brd);
  box-shadow: var(--glass-shadow), var(--glass-inset);
  overflow: hidden;
  animation: rise .55s cubic-bezier(.2,.8,.2,1);
}
/* верхний «блик» стекла */
.card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 40%;
  background: linear-gradient(180deg, rgba(255,255,255,.10), transparent);
  pointer-events: none;
}
@keyframes rise { from{opacity:0;transform:translateY(26px) scale(.96);} to{opacity:1;transform:none;} }

.hidden { display: none !important; }
.muted { color: var(--tg-hint); font-size: 14px; line-height: 1.5; }
.error { color: #ff7a7a; font-size: 13px; margin-top: 10px; }

h1 { font-size: clamp(20px,5.5vw,24px); margin: 10px 0 4px; letter-spacing:-.02em; }
h2 { font-size: clamp(17px,4.6vw,19px); margin: 4px 0 18px; letter-spacing:-.01em; }

.gw-head { margin-bottom: 18px; position: relative; z-index: 1; }
.gw-emoji { font-size: 50px; line-height: 1; filter: drop-shadow(0 10px 22px rgba(124,92,255,.55)); }
.gw-prize { color: var(--tg-link); font-weight: 600; font-size: 15px; margin: 4px 0 0; }

.step { animation: fade .35s ease; position: relative; z-index: 1; }
@keyframes fade { from{opacity:0;transform:translateY(6px);} to{opacity:1;transform:none;} }

.spinner {
  width: 46px; height: 46px; margin: 12px auto 16px;
  border: 3px solid rgba(255,255,255,.14);
  border-top-color: var(--accent-2);
  border-radius: 50%; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* кнопки */
.btn {
  width: 100%; border: none; cursor: pointer;
  padding: 16px 18px; border-radius: var(--radius-sm);
  font-size: 16px; font-weight: 700; letter-spacing: .01em;
  color: var(--tg-button-text); margin-top: 14px;
  min-height: 52px;
  background: var(--accent-grad);
  background-size: 160% 160%;
  box-shadow: 0 12px 28px rgba(124,92,255,.45), var(--glass-inset);
  transition: transform .12s ease, box-shadow .2s ease, filter .2s;
  animation: sheen 6s ease infinite;
}
@keyframes sheen { 0%,100%{background-position:0% 50%;} 50%{background-position:100% 50%;} }
.btn:active { transform: scale(.97); box-shadow: 0 6px 16px rgba(124,92,255,.4); }
.btn.primary { /* алиас */ }
.btn:disabled { filter: grayscale(.5) brightness(.7); opacity:.6; }

/* слайдер «я не робот» */
.slider {
  position: relative; height: 62px; border-radius: var(--radius-sm);
  background: rgba(255,255,255,.06);
  border: 1px solid var(--glass-brd);
  box-shadow: var(--glass-inset);
  overflow: hidden; user-select: none; touch-action: none;
}
.slider-fill { position:absolute; inset:0; width:0; background: var(--accent-grad); opacity:.6; }
.slider-thumb {
  position:absolute; top:6px; left:6px; width:50px; height:50px;
  border-radius:13px; background: var(--accent-grad);
  display:flex; align-items:center; justify-content:center;
  font-size:22px; color:#fff; z-index:2;
  box-shadow:0 8px 18px rgba(0,0,0,.35), var(--glass-inset);
}
.slider-label {
  position:absolute; inset:0; display:flex; align-items:center; justify-content:center;
  color: var(--tg-hint); font-size:14px; pointer-events:none; font-weight:600;
}
.check-done {
  margin: 18px auto 0; width:66px; height:66px; border-radius:50%;
  background: var(--accent-grad); color:#fff; font-size:34px;
  display:flex; align-items:center; justify-content:center;
  box-shadow: 0 14px 30px rgba(34,211,238,.4);
  animation: pop .45s cubic-bezier(.2,1.4,.4,1);
}
@keyframes pop { from{transform:scale(0);} to{transform:scale(1);} }

/* математика */
.math-q {
  font-size: clamp(30px,9vw,38px); font-weight: 800; letter-spacing: 2px;
  background: var(--accent-grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; margin: 8px 0 18px;
}
.math-input {
  width: 100%; padding: 16px; font-size: 22px; text-align:center; font-weight:700;
  border-radius: var(--radius-sm); border: 1px solid var(--glass-brd);
  background: rgba(255,255,255,.06); color: var(--tg-text); outline: none;
  box-shadow: var(--glass-inset);
}
.math-input:focus { border-color: var(--accent-2); }

/* каналы */
.channels { display:flex; flex-direction:column; gap:10px; margin-bottom: 6px; }
.channel-link {
  display:flex; align-items:center; gap:10px; text-decoration:none;
  padding: 15px 16px; border-radius:var(--radius-sm); min-height:52px;
  background: rgba(255,255,255,.06); border:1px solid var(--glass-brd);
  box-shadow: var(--glass-inset);
  color: var(--tg-text); font-weight:600; transition: background .2s, transform .1s;
}
.channel-link:active { background: rgba(255,255,255,.12); transform: scale(.99); }
.channel-link.ok { border-color: #3ad29f; }

.success-burst { font-size: 70px; animation: burst .65s cubic-bezier(.2,1.5,.4,1); }
@keyframes burst { 0%{transform:scale(0) rotate(-20deg);} 70%{transform:scale(1.25);} 100%{transform:scale(1);} }