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

:root {
  --page-bg: #4a1456;
  --card-bg-top: #211d44;
  --card-bg-bottom: #1a1736;
  --card-border: rgba(204, 170, 255, 0.14);
  --text-main: #f5ede3;
  --text-soft: #efe3d8;
  --text-muted: #cabbd8;
  --button-bg: #d4b6ff;
  --button-text: #2d2146;
  --soft-panel: rgba(96, 88, 134, 0.26);
  --soft-border: rgba(255, 255, 255, 0.08);
  --glow: 0 0 26px rgba(212, 182, 255, 0.34);
  --card-shadow: 0 18px 40px rgba(10, 8, 30, 0.22);
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--page-bg);
  color: var(--text-main);
  font-family: Georgia, serif;
  padding: 24px 16px;
}

.shadow-tool {
  max-width: 780px;
  margin: 0 auto;
  padding: 34px 26px 24px;
  border-radius: 26px;
  background: linear-gradient(180deg, var(--card-bg-top) 0%, var(--card-bg-bottom) 100%);
  border: 1px solid var(--card-border);
  box-shadow:
    var(--card-shadow),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
  text-align: center;
}

.icon {
  font-size: 1.6rem;
  margin-bottom: 10px;
}

.shadow-tool h2 {
  margin: 0 0 14px;
  font-size: clamp(1.8rem, 3.2vw, 2.5rem);
  line-height: 1.16;
  color: var(--text-main);
}

.tool-intro {
  max-width: 650px;
  margin: 0 auto 22px;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-soft);
}

#startButton,
#nextButton,
#restartButton,
.secondary-button {
  border: none;
  border-radius: 999px;
  font-family: Georgia, serif;
  font-size: 0.98rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

#startButton,
#nextButton,
#restartButton {
  background: var(--button-bg);
  color: var(--button-text);
  box-shadow: var(--glow);
}

#startButton {
  padding: 14px 26px;
  min-width: 280px;
  max-width: 100%;
}

#nextButton,
#restartButton {
  padding: 13px 22px;
}

.secondary-button {
  padding: 13px 22px;
  background: transparent;
  color: var(--text-soft);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

#startButton:hover,
#nextButton:hover,
#restartButton:hover,
.secondary-button:hover {
  transform: translateY(-1px);
}

#toolContent {
  margin-top: 24px;
  text-align: left;
}

.prompt-box,
.result-box {
  background: var(--soft-panel);
  border: 1px solid var(--soft-border);
  border-radius: 20px;
  padding: 22px;
}

.prompt-label {
  margin: 0 0 12px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

#promptText {
  margin: 0 0 16px;
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--text-main);
}

#responseInput {
  width: 100%;
  min-height: 120px;
  resize: vertical;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  font-family: Georgia, serif;
  font-size: 0.98rem;
  line-height: 1.65;
  padding: 15px 16px;
  outline: none;
}

#responseInput::placeholder {
  color: rgba(245, 237, 227, 0.55);
}

#responseInput:focus {
  border-color: rgba(212, 182, 255, 0.36);
  box-shadow: 0 0 0 3px rgba(212, 182, 255, 0.1);
}

.button-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
}

.result-box {
  text-align: left;
}

#resultText p {
  margin: 0 0 14px;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-soft);
}

#resultText p:last-child {
  margin-bottom: 0;
}

#restartButton {
  margin-top: 18px;
}

.hidden {
  display: none;
}

@media (max-width: 768px) {
  body {
    padding: 18px 12px;
  }

  .shadow-tool {
    padding: 28px 18px 20px;
    border-radius: 22px;
  }

  .shadow-tool h2 {
    font-size: 1.9rem;
  }

  .tool-intro {
    font-size: 0.96rem;
    line-height: 1.7;
  }

  #startButton {
    width: 100%;
    min-width: 0;
  }

  #promptText {
    font-size: 1.15rem;
  }

  .button-row {
    flex-direction: column;
  }

  .button-row button {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .shadow-tool {
    padding: 22px 14px 18px;
    border-radius: 18px;
  }

  .icon {
    font-size: 1.35rem;
  }

  .shadow-tool h2 {
    font-size: 1.55rem;
  }

  .tool-intro {
    font-size: 0.92rem;
  }

  #responseInput {
    min-height: 110px;
    font-size: 0.95rem;
  }
}