:root {
  --color-bg: #e6f4f7;
  --color-bg-accent: #d4f0e4;
  --color-card: #ffffff;
  --color-primary: #1f8ac0;
  --color-primary-soft: #41a0d0;
  --color-secondary: #2f9e7f;
  --color-secondary-soft: #4fb297;
  --color-text-main: #15324a;
  --color-text-muted: #496377;
  --color-error: #c0392b;
  --color-success: #1e8449;
  --shadow-soft: 0 10px 30px rgba(10, 60, 90, 0.12);
  --radius-card: 18px;
  --radius-pill: 999px;
  --transition-fast: 0.2s ease-out;
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  color: var(--color-text-main);
  background: radial-gradient(circle at top left, #e8f7ff, #d9f3ea 40%, #f6fbff);
}

.page-wrapper {
  min-height: 100vh;
  max-width: 960px;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  background: linear-gradient(
    120deg,
    rgba(255, 255, 255, 0.96),
    rgba(212, 240, 228, 0.96)
  );
  border-radius: 16px;
  box-shadow: var(--shadow-soft);
}

.logo-title {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-image {
  width: 56px;
  height: 56px;
  object-fit: contain;
  border-radius: 14px;
  background: #ffffff;
  padding: 6px;
}

.title-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.game-title {
  margin: 0;
  font-size: 1.4rem;
  letter-spacing: 0.03em;
}

.game-subtitle {
  margin: 0;
  font-size: 0.86rem;
  color: var(--color-text-muted);
}

.safepoints-badge {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding: 6px 12px;
  border-radius: 14px;
  background: linear-gradient(135deg, #1f8ac0, #2f9e7f);
  color: #ffffff;
  box-shadow: 0 6px 16px rgba(7, 81, 121, 0.35);
}

.safepoints-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  opacity: 0.9;
}

.safepoints-value {
  font-size: 1.2rem;
  font-weight: 700;
}

.game-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px 0 16px;
}

.screen {
  width: 100%;
  max-width: 800px;
}

.hidden {
  display: none;
}

.card {
  background: var(--color-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  padding: 20px 20px 16px;
}

.landing-card {
  text-align: center;
}

.player-name-block {
  margin: 10px auto 18px;
  max-width: 360px;
  text-align: left;
}

.player-name-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 4px;
}

.player-name-input {
  width: 100%;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid rgba(21, 50, 74, 0.25);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.player-name-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(31, 138, 192, 0.2);
}

.player-name-error {
  min-height: 16px;
  margin: 4px 0 0;
  font-size: 0.8rem;
  color: var(--color-error);
}

.landing-title {
  margin: 4px 0 8px;
  font-size: 1.6rem;
}

.landing-text {
  margin: 0 0 20px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.chapter-card-wrapper {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chapter-title {
  margin: 4px 0 4px;
  font-size: 1.4rem;
}

.chapter-intro {
  margin: 0 0 10px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.chapter-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chapter-card {
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(21, 50, 74, 0.14);
  background: #f3fbff;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: background var(--transition-fast), box-shadow var(--transition-fast),
    transform var(--transition-fast), border-color var(--transition-fast);
}

.chapter-card:hover {
  background: #e4f5fb;
  border-color: rgba(31, 138, 192, 0.5);
  box-shadow: 0 6px 14px rgba(18, 98, 140, 0.18);
  transform: translateY(-1px);
}

.chapter-card-title {
  margin: 0;
  font-size: 1.02rem;
}

.chapter-card-description {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.chapter-card-meta {
  margin: 0;
  font-size: 0.8rem;
  color: var(--color-secondary);
  font-weight: 600;
}

.mission-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.mission-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}

.mission-header-left {
  display: flex;
  align-items: center;
  gap: 6px;
}

.mission-badge,
.difficulty-badge {
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 600;
}

.mission-badge {
  background: rgba(31, 138, 192, 0.1);
  color: var(--color-primary);
}

.difficulty-badge {
  background: rgba(47, 158, 127, 0.12);
  color: var(--color-secondary);
}

.chapter-badge {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 600;
}

.mission-title {
  margin: 0;
  font-size: 1.3rem;
}

.mission-story {
  margin: 4px 0 8px;
  font-size: 0.96rem;
  color: var(--color-text-muted);
}

.choices-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 6px 0 4px;
}

.choice-button {
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  border-radius: 999px;
  border: 2px solid transparent;
  background: #f1f8fb;
  color: var(--color-text-main);
  font-size: 0.94rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background var(--transition-fast), box-shadow var(--transition-fast),
    transform var(--transition-fast), border-color var(--transition-fast);
}

.choice-button::before {
  content: attr(data-choice-id);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  background: #ffffff;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.8rem;
  box-shadow: 0 0 0 1px rgba(31, 138, 192, 0.18);
}

.choice-button:hover:not(.disabled) {
  background: #e3f3fa;
  box-shadow: 0 6px 16px rgba(16, 89, 128, 0.16);
  transform: translateY(-1px);
}

.choice-button.disabled {
  cursor: default;
  opacity: 0.7;
  box-shadow: none;
}

.choice-button.correct {
  border-color: var(--color-secondary-soft);
  background: #e0f5ed;
}

.choice-button.incorrect {
  border-color: rgba(192, 57, 43, 0.6);
  background: #fdebea;
}

.feedback-message {
  min-height: 20px;
  margin: 4px 0 0;
  font-size: 0.9rem;
}

.feedback-message.error {
  color: var(--color-error);
}

.feedback-message.success {
  color: var(--color-success);
}

.reward-message {
  min-height: 22px;
  margin: 2px 0 0;
  font-size: 0.9rem;
  color: var(--color-secondary);
  font-weight: 600;
}

.mission-footer {
  margin-top: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.progress-text {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.chapter-complete-actions {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.primary-button,
.secondary-button {
  border: none;
  border-radius: var(--radius-pill);
  padding: 10px 18px;
  font-size: 0.98rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast),
    box-shadow var(--transition-fast), opacity var(--transition-fast);
}

.primary-button {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #ffffff;
  box-shadow: 0 6px 18px rgba(18, 94, 132, 0.35);
}

.primary-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(18, 94, 132, 0.4);
}

.secondary-button {
  background: #e1f2f6;
  color: var(--color-primary);
}

.secondary-button:disabled {
  opacity: 0.5;
  cursor: default;
  box-shadow: none;
}

.game-footer {
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  padding-bottom: 4px;
}

.game-footer a {
  color: var(--color-primary-soft);
  text-decoration: none;
  font-weight: 600;
}

.game-footer a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  .game-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .safepoints-badge {
    align-items: flex-start;
    width: 100%;
  }

  .card {
    padding: 16px 14px 14px;
  }

  .mission-footer {
    flex-direction: column-reverse;
    align-items: stretch;
  }

  .secondary-button {
    width: 100%;
    text-align: center;
  }
}