:root {
  --bg: var(--tg-theme-bg-color, #fff7f6);
  --secondary-bg: var(--tg-theme-secondary-bg-color, #ffffff);
  --text: var(--tg-theme-text-color, #241a1a);
  --hint: var(--tg-theme-hint-color, #8e8e93);
  --link: var(--tg-theme-link-color, #2481cc);
  --button: var(--tg-theme-button-color, #e0558a);
  --button-text: var(--tg-theme-button-text-color, #ffffff);
  --accent-blue: #3b6fd6;
  --accent-green: #2e9e5b;
  --card-border: rgba(224, 85, 138, 0.18);
  --gradient-top: #ffe3ec;
  --gradient-bottom: #e3f1ff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --gradient-top: #3a2233;
    --gradient-bottom: #1e2a3a;
    --card-border: rgba(255, 255, 255, 0.08);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  background-image: linear-gradient(180deg, var(--gradient-top) 0%, var(--gradient-bottom) 100%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  position: relative;
  overflow-x: hidden;
}

/* Декоративная собачка на заднем фоне — временно эмодзи-заглушка,
   заменим на настоящую картинку (dog.png), когда пришлёте файл */
.bg-decoration {
  position: fixed;
  right: -20px;
  bottom: -10px;
  width: 220px;
  height: 220px;
  font-size: 200px;
  line-height: 1;
  opacity: 0.2;
  pointer-events: none;
  z-index: 0;
  user-select: none;
}

.bg-decoration::before {
  content: "🐕";
}

.screen {
  position: relative;
  z-index: 1;
  padding: 16px 16px 32px;
  max-width: 480px;
  margin: 0 auto;
}

.top-bar {
  display: flex;
  justify-content: flex-end;
}

.date-badge {
  background: var(--secondary-bg);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

h1 {
  text-align: center;
  font-size: 24px;
  line-height: 1.25;
  margin: 14px 0 20px;
}

.subtitle {
  display: inline-block;
  margin-top: 4px;
  font-size: 15px;
  font-weight: 500;
  color: var(--hint);
}

.rate-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 20px;
}

.rate-card {
  background: var(--secondary-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 14px;
}

.rate-card .rate-card-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--hint);
  margin-bottom: 8px;
}

.rate-card .rate-value {
  font-size: 20px;
  font-weight: 700;
  margin: 2px 0;
}

.rate-card .rate-value.green {
  color: var(--accent-green);
}

.rate-card .rate-value.blue {
  color: var(--accent-blue);
}

.rate-card .rate-sub {
  font-size: 12px;
  color: var(--hint);
  margin-top: 2px;
}

.loading,
.error-text {
  color: var(--hint);
  grid-column: 1 / -1;
  text-align: center;
}

.stale-warning {
  grid-column: 1 / -1;
  color: #c0392b;
  font-size: 13px;
  text-align: center;
  margin: -8px 0 4px;
}

.action-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 16px;
}

.action-button {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px 8px;
  border: 1px solid var(--card-border);
  border-radius: 16px;
  background: var(--secondary-bg);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.3;
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.action-button:active {
  transform: scale(0.97);
}

.action-button.selected {
  border-color: var(--button);
  box-shadow: 0 0 0 2px var(--button) inset;
}

.action-icon {
  font-size: 26px;
}

.back-button {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: none;
  color: var(--link);
  font-size: 15px;
  font-weight: 600;
  padding: 8px 0 16px;
  cursor: pointer;
}

.card {
  background: var(--secondary-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 16px;
}

label {
  display: block;
  font-size: 13px;
  color: var(--hint);
  margin-bottom: 6px;
}

input[type="number"] {
  width: 100%;
  font-size: 18px;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--card-border);
  background: var(--bg);
  color: var(--text);
}

input[type="number"]:focus {
  outline: 2px solid var(--link);
}

.result {
  font-size: 18px;
  font-weight: 700;
  min-height: 24px;
  margin-top: 10px;
}

.primary-button {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 12px;
  background: var(--button);
  color: var(--button-text);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 6px;
}

.primary-button:disabled {
  opacity: 0.5;
  cursor: default;
}

.calc-hint {
  font-size: 13px;
  color: var(--hint);
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--card-border);
}

.status-message {
  text-align: center;
  margin-top: 14px;
  font-size: 14px;
}

.status-message.success {
  color: #2e7d32;
}

.status-message.error {
  color: #c0392b;
}