:root {
  --bg: var(--tg-theme-bg-color, #f4f5f7);
  --text: var(--tg-theme-text-color, #1c1c1e);
  --hint: var(--tg-theme-hint-color, #8e8e93);
  --link: var(--tg-theme-link-color, #2a7fff);
  --button: var(--tg-theme-button-color, #2a7fff);
  --button-text: var(--tg-theme-button-text-color, #ffffff);
  --secondary-bg: var(--tg-theme-secondary-bg-color, #ffffff);
  --section-separator: rgba(120, 120, 128, 0.18);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Vazirmatn", "IRANSans", "Segoe UI", Tahoma, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.app {
  max-width: 520px;
  margin: 0 auto;
  padding: 20px 16px 40px;
  min-height: 100vh;
}

.app-header {
  text-align: center;
  margin-bottom: 18px;
}

.app-header h1 {
  font-size: 1.5rem;
  margin: 0 0 4px;
}

.subtitle {
  color: var(--hint);
  margin: 0;
  font-size: 0.95rem;
}

.today-card {
  background: var(--secondary-bg);
  border-radius: 16px;
  padding: 16px;
  text-align: center;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.today-label {
  color: var(--hint);
  font-size: 0.85rem;
  margin-bottom: 6px;
}

.today-values {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.9;
}

.tabs {
  display: flex;
  background: var(--secondary-bg);
  border-radius: 12px;
  padding: 4px;
  margin-bottom: 16px;
  gap: 4px;
}

.tab {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text);
  padding: 10px 8px;
  border-radius: 9px;
  font-size: 0.95rem;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.tab.active {
  background: var(--button);
  color: var(--button-text);
  font-weight: 600;
}

.panel {
  background: var(--secondary-bg);
  border-radius: 16px;
  padding: 18px 16px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.panel.hidden {
  display: none;
}

.field-label {
  display: block;
  font-size: 0.9rem;
  color: var(--hint);
  margin-bottom: 8px;
}

.date-input,
select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--section-separator);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
}

.jalali-selects {
  display: grid;
  grid-template-columns: 1fr 1.4fr 1fr;
  gap: 8px;
}

.result {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--section-separator);
  min-height: 1.4em;
  font-size: 1.05rem;
  line-height: 2;
}

.result .big {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--link);
}

.result .muted {
  color: var(--hint);
  font-size: 0.9rem;
}

.app-footer {
  text-align: center;
  margin-top: 28px;
  color: var(--hint);
  font-size: 0.8rem;
}