:root {
  --bg: #05070d;
  --bg-soft: rgba(255, 255, 255, 0.05);
  --panel: rgba(10, 14, 24, 0.75);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text: #f4f7ff;
  --muted: #a5acc5;
  --primary: #7c5cff;
  --primary-2: #00d5ff;
  --success: #17d48b;
  --danger: #ff5d73;
  --warning: #ffb44c;
  --shadow: 0 20px 80px rgba(0, 0, 0, 0.45);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: 'Inter', sans-serif;
  background:
    radial-gradient(circle at top, rgba(124, 92, 255, 0.18), transparent 28%),
    radial-gradient(circle at 90% 20%, rgba(0, 213, 255, 0.14), transparent 26%),
    linear-gradient(180deg, #070a12 0%, #03050a 100%);
  color: var(--text);
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 30px 30px;
  mask-image: radial-gradient(circle at center, black 45%, transparent 90%);
  pointer-events: none;
}

.bg-glow {
  position: fixed;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  pointer-events: none;
}

.glow-left {
  top: 6%;
  left: -80px;
  background: rgba(124, 92, 255, 0.35);
}

.glow-right {
  right: -60px;
  bottom: 10%;
  background: rgba(0, 213, 255, 0.22);
}

.page-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  position: relative;
}

.captcha-card {
  width: min(100%, 560px);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(18px);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.captcha-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.08), transparent 35%, transparent 65%, rgba(0,213,255,0.08));
  pointer-events: none;
}

.card-badge {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.09);
  background: rgba(255,255,255,0.04);
  color: #dce4ff;
  font-size: 12px;
  letter-spacing: 0.14em;
  font-weight: 700;
}

h1 {
  margin: 18px 0 12px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.05;
}

.card-text {
  margin: 0 0 24px;
  color: var(--muted);
  line-height: 1.65;
}

.captcha-stage {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: 18px;
}

.captcha-header-row,
.status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.captcha-header-row {
  margin-bottom: 14px;
  color: #dbe2ff;
  font-size: 14px;
  font-weight: 600;
}

.ghost-btn {
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  border-radius: 999px;
  padding: 10px 14px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.ghost-btn:hover {
  transform: translateY(-1px);
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.18);
}

.puzzle-board {
  position: relative;
  height: 230px;
  border-radius: 20px;
  overflow: hidden;
  background:
    radial-gradient(circle at 25% 20%, rgba(124, 92, 255, 0.35), transparent 22%),
    radial-gradient(circle at 70% 65%, rgba(0, 213, 255, 0.28), transparent 26%),
    linear-gradient(135deg, #10172a 0%, #0a1020 55%, #070b15 100%);
  border: 1px solid rgba(255,255,255,0.08);
}

.board-overlay,
.board-noise,
.scan-line {
  position: absolute;
  inset: 0;
}

.board-overlay {
  background:
    linear-gradient(120deg, rgba(255,255,255,0.04), transparent 28%, transparent 68%, rgba(255,255,255,0.04)),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.03), rgba(255,255,255,0.03) 1px, transparent 1px, transparent 16px);
}

.board-noise {
  opacity: 0.12;
  background-image: radial-gradient(rgba(255,255,255,0.7) 0.5px, transparent 0.8px);
  background-size: 14px 14px;
}

.scan-line {
  background: linear-gradient(180deg, transparent, rgba(0,213,255,0.14), transparent);
  animation: scan 3.4s linear infinite;
}

@keyframes scan {
  from { transform: translateY(-100%); }
  to { transform: translateY(100%); }
}

.target-slot,
.puzzle-piece {
  position: absolute;
  top: 74px;
  width: 58px;
  height: 58px;
  border-radius: 16px;
}

.target-slot::before,
.puzzle-piece::before,
.target-slot::after,
.puzzle-piece::after {
  content: '';
  position: absolute;
  border-radius: 50%;
}

.target-slot::before,
.puzzle-piece::before {
  width: 18px;
  height: 18px;
  top: 19px;
  right: -8px;
}

.target-slot::after,
.puzzle-piece::after {
  width: 18px;
  height: 18px;
  bottom: -8px;
  left: 18px;
}

.target-slot {
  background: rgba(0,0,0,0.34);
  border: 2px dashed rgba(255,255,255,0.24);
  box-shadow: inset 0 0 0 999px rgba(0,0,0,0.14);
}

.target-slot::before,
.target-slot::after {
  background: rgba(0,0,0,0.34);
  border: 2px dashed rgba(255,255,255,0.24);
}

.puzzle-piece {
  left: 18px;
  background: linear-gradient(135deg, rgba(124,92,255,0.95), rgba(0,213,255,0.95));
  box-shadow: 0 12px 40px rgba(8, 16, 34, 0.4), inset 0 1px 0 rgba(255,255,255,0.35);
  border: 1px solid rgba(255,255,255,0.38);
  transition: transform 0.08s linear, box-shadow 0.2s ease;
}

.puzzle-piece::before,
.puzzle-piece::after {
  background: linear-gradient(135deg, rgba(124,92,255,0.95), rgba(0,213,255,0.95));
  border: 1px solid rgba(255,255,255,0.38);
}

.puzzle-piece.solved {
  box-shadow: 0 0 0 2px rgba(23,212,139,0.45), 0 16px 50px rgba(23,212,139,0.22);
}

.slider-box {
  margin-top: 18px;
}

.slider-track {
  position: relative;
  height: 62px;
  border-radius: 999px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  overflow: hidden;
}

.slider-progress {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, rgba(124,92,255,0.4), rgba(0,213,255,0.28));
  transition: width 0.08s linear;
}

.slider-label {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #d7ddf6;
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  padding: 0 80px;
}

.slider-handle {
  position: absolute;
  top: 6px;
  left: 6px;
  width: 50px;
  height: 50px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, #ffffff, #dbe8ff);
  box-shadow: 0 14px 28px rgba(0,0,0,0.28), inset 0 1px 0 rgba(255,255,255,0.9);
  cursor: grab;
  z-index: 2;
}

.slider-handle:active {
  cursor: grabbing;
}

.slider-handle span,
.slider-handle span::before,
.slider-handle span::after {
  display: block;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 16px;
  border-radius: 999px;
  background: linear-gradient(180deg, #6b5cff, #00c8ff);
}

.slider-handle span {
  left: 19px;
}

.slider-handle span::before,
.slider-handle span::after {
  content: '';
}

.slider-handle span::before { left: -8px; }
.slider-handle span::after { left: 8px; }

.status-row {
  margin-top: 16px;
}

.status-pill,
.attempts-pill {
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 700;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
}

.redirect-card {
  margin-top: 18px;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.035);
  border: 1px solid rgba(255,255,255,0.08);
}

.redirect-label {
  display: block;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 8px;
}

.redirect-card code {
  color: #9fe6ff;
  font-size: 14px;
  word-break: break-all;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%) translateY(20px);
  min-width: 240px;
  max-width: calc(100vw - 32px);
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(7, 12, 20, 0.92);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--text);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  box-shadow: var(--shadow);
  z-index: 20;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.success {
  color: #abffd8;
  border-color: rgba(23,212,139,0.35);
}

.error {
  color: #ffd2d8;
  border-color: rgba(255,93,115,0.35);
}

@media (max-width: 640px) {
  .page-shell {
    padding: 14px;
  }

  .captcha-card {
    padding: 18px;
    border-radius: 24px;
  }

  .captcha-stage {
    padding: 14px;
  }

  .captcha-header-row,
  .status-row {
    flex-direction: column;
    align-items: stretch;
  }

  .status-pill,
  .attempts-pill,
  .ghost-btn {
    text-align: center;
  }

  .puzzle-board {
    height: 210px;
  }

  .target-slot,
  .puzzle-piece {
    top: 68px;
    width: 52px;
    height: 52px;
  }

  .target-slot::before,
  .puzzle-piece::before,
  .target-slot::after,
  .puzzle-piece::after {
    transform: scale(0.92);
    transform-origin: center;
  }

  .slider-label {
    font-size: 13px;
    padding: 0 68px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}