:root {
  --activity-primary: #1f6f8b;
  --activity-secondary: #2a9d8f;
  --activity-accent: #f4a261;
  --activity-bg: #eef6f7;
  --activity-surface: #ffffff;
  --activity-ink: #17324d;
  --activity-muted: #557080;
  --activity-line: #b9d8de;
}

html {
  min-height: 100%;
  background: var(--activity-bg);
}

body,
#ardoraMain,
#ardoraAct,
#ardoraQuest,
#defIma,
.conten,
button,
input {
  font-family: Arial, Helvetica, sans-serif !important;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--activity-ink) !important;
  background:
    radial-gradient(circle at top right, rgba(42, 157, 143, 0.18), transparent 32%),
    linear-gradient(145deg, #f7fbfc 0%, var(--activity-bg) 100%) !important;
  overflow-x: hidden;
}

#ardoraMain {
  box-sizing: border-box;
  width: calc(100% - 24px);
  max-width: 1160px;
  margin: 12px auto;
  padding: 16px !important;
  color: var(--activity-ink) !important;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(31, 111, 139, 0.14);
  border-radius: 18px;
  box-shadow: 0 14px 34px rgba(23, 50, 77, 0.13);
  overflow: hidden;
}

.activity-stage {
  display: flow-root;
  position: relative;
  clear: both;
  transform-origin: top left;
}

#ardoraEnu {
  box-sizing: border-box;
  padding: 12px 16px 14px !important;
  margin-bottom: 16px !important;
  font-family: Arial, Helvetica, sans-serif !important;
  line-height: 1.4;
  color: #ffffff !important;
  background: linear-gradient(135deg, var(--activity-primary), var(--activity-secondary));
  border: 0 !important;
  border-radius: 14px;
  box-shadow: 0 7px 18px rgba(31, 111, 139, 0.22);
}

#ardoraEnu .activity-title {
  display: block;
  color: #ffffff;
  font-size: 30px;
  font-weight: 700;
  line-height: 1.2;
}

#ardoraEnu .activity-intro {
  display: block;
  max-width: 900px;
  margin: 8px auto 0;
  color: #f5ffff;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.45;
}

#ardoraEnu .activity-guide {
  display: block;
  max-width: 900px;
  margin: 5px auto 0;
  color: #d9fff4;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.45;
}

#ardoraQuest,
#defIma,
.conten {
  font-size: 15px !important;
  line-height: 1.4 !important;
}

#ardoraAct {
  box-sizing: border-box;
  background-color: var(--activity-surface) !important;
  border-color: var(--activity-line) !important;
  border-radius: 14px !important;
  box-shadow: 0 7px 18px rgba(23, 50, 77, 0.1);
}

#ardoraQuest,
#defIma {
  box-sizing: border-box;
  color: var(--activity-ink) !important;
  background: #eaf5f4;
  border-left: 5px solid var(--activity-secondary);
  border-radius: 8px;
  padding: 10px 12px !important;
}

.bLetter {
  color: #ffffff !important;
  background: linear-gradient(145deg, var(--activity-secondary), var(--activity-primary)) !important;
  border: 1px solid rgba(255, 255, 255, 0.45) !important;
  border-radius: 9px !important;
  box-shadow: 0 3px 8px rgba(23, 50, 77, 0.2);
  transition: filter 0.18s ease, box-shadow 0.18s ease;
}

.bLetter:hover {
  filter: brightness(1.12);
  box-shadow: 0 5px 12px rgba(23, 50, 77, 0.28);
}

.bGame {
  color: var(--activity-ink) !important;
  background: #ffffff !important;
  border-color: var(--activity-line) !important;
  border-radius: 8px !important;
  box-shadow: inset 0 -3px 0 #dbecef;
}

.cell {
  color: var(--activity-ink) !important;
  background-color: #f4fafb !important;
}

.activeCell {
  border-color: #8dbec8 !important;
}

.blackCell {
  background-color: #24485b !important;
  border-color: #24485b !important;
}

.conten {
  color: var(--activity-ink) !important;
  background: #f7fbfc !important;
  border-color: var(--activity-line) !important;
  border-radius: 9px !important;
  box-shadow: 0 2px 6px rgba(23, 50, 77, 0.08);
  transition: background-color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.conten:hover {
  background: #e5f4f2 !important;
  border-color: var(--activity-secondary) !important;
  transform: translateY(-1px);
}

#buttonOk {
  overflow: hidden;
  background: var(--activity-secondary) !important;
  border: 0 !important;
  border-radius: 50% !important;
  box-shadow: 0 6px 14px rgba(23, 50, 77, 0.24) !important;
}

#buttonOk #outerRect,
#buttonOk #innerRect {
  fill: var(--activity-secondary) !important;
  stroke: #ffffff !important;
}

#buttonOk #buttonText {
  fill: #ffffff !important;
}

#buttonDir {
  color: #ffffff !important;
  background: var(--activity-primary) !important;
  border-color: var(--activity-primary) !important;
  border-radius: 8px !important;
}

.titleDef {
  color: var(--activity-primary) !important;
  border-color: var(--activity-line) !important;
}

#ardoraTabSVG {
  border-color: var(--activity-line) !important;
  border-radius: 10px !important;
  box-shadow: 0 4px 12px rgba(23, 50, 77, 0.16) !important;
}

*:focus-visible {
  outline: 3px solid var(--activity-accent) !important;
  outline-offset: 2px;
}

@media (max-width: 700px) {
  #ardoraEnu .activity-title {
    font-size: 24px;
  }

  #ardoraEnu .activity-intro {
    font-size: 15px;
  }

  #ardoraEnu .activity-guide {
    font-size: 13px;
  }

  #ardoraMain {
    width: calc(100% - 12px);
    margin: 6px auto;
    padding: 10px !important;
    border-radius: 12px;
  }
}