/* ریست خیلی سبک */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "IRANYekan", "Vazirmatn", sans-serif;
  background: radial-gradient(circle at top left, #ffe6f0, #f4edff 40%, #fdfbff 80%);
  color: #222;
  direction: rtl;
}

/* اپ کانتینر */
.app {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem;
}

/* هدر */
.app-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  width: 46px;
  height: 46px;
  border-radius: 18px;
  background: linear-gradient(135deg, #f06292, #ba68c8);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.4rem;
  box-shadow: 0 12px 30px rgba(240, 98, 146, 0.35);
}

.brand-text h1 {
  margin: 0;
  font-size: 1.2rem;
}

.brand-text p {
  margin: 0.15rem 0 0;
  font-size: 0.85rem;
  color: #555;
}

.brand-text span {
  font-weight: 600;
  color: #c2185b;
}

.badge {
  font-size: 0.8rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: #6a1b9a;
  border: 1px solid rgba(186, 104, 200, 0.4);
  box-shadow: 0 6px 16px rgba(0,0,0,0.06);
}

/* مقدمه */
.intro {
  margin-bottom: 1.25rem;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 18px;
  padding: 0.9rem 1rem;
  box-shadow: 0 10px 30px rgba(174, 144, 214, 0.15);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* گرید کارت‌ها */
.calculator-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.8rem;
  margin-bottom: 1.4rem;
}

.calc-card {
  border: none;
  cursor: pointer;
  text-align: right;
  padding: 0.9rem 0.85rem;
  border-radius: 18px;
  background: rgba(255,255,255,0.9);
  box-shadow: 0 10px 24px rgba(169, 145, 200, 0.18);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
}

.calc-card i {
  font-size: 1.5rem;
  color: #ab47bc;
}

.calc-card h3 {
  margin: 0;
  font-size: 0.95rem;
}

.calc-card p {
  margin: 0;
  font-size: 0.8rem;
  color: #666;
}

.calc-card::after {
  content: "→";
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  color: #999;
}

.calc-card.active {
  background: linear-gradient(135deg, #f8bbd0, #e1bee7);
  box-shadow: 0 12px 30px rgba(233, 30, 99, 0.28);
  transform: translateY(-1px);
}

.calc-card.active i {
  color: #ad1457;
}

.calc-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(150, 120, 200, 0.28);
}

/* پنل‌ها */
.panels {
  background: rgba(255,255,255,0.92);
  border-radius: 24px;
  padding: 1.2rem 1.1rem 1.4rem;
  box-shadow: 0 18px 40px rgba(128, 106, 183, 0.25);
}

.calc-panel {
  display: none;
  animation: fadeIn 0.25s ease;
}

.calc-panel.active {
  display: block;
}

.calc-panel h2 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  color: #6a1b9a;
}

.panel-desc {
  margin: 0 0 0.9rem;
  font-size: 0.85rem;
  line-height: 1.7;
  color: #555;
}

.panel-desc code {
  background: #f3e5f5;
  padding: 0.05rem 0.25rem;
  border-radius: 4px;
}

/* فرم‌ها */
.calc-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
}

.form-row label {
  color: #444;
}

.form-row input,
.form-row textarea {
  border-radius: 12px;
  border: 1px solid #e0cfe9;
  padding: 0.5rem 0.6rem;
  font-size: 0.85rem;
  outline: none;
  background: #fcf9ff;
  transition: border 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.form-row input:focus,
.form-row textarea:focus {
  border-color: #ba68c8;
  box-shadow: 0 0 0 2px rgba(186, 104, 200, 0.2);
  background: #ffffff;
}

.form-row textarea {
  resize: vertical;
}

/* گرید دونیمه برای گروه خونی */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
}

/* دکمه‌ها */
.btn-primary {
  align-self: flex-start;
  border: none;
  border-radius: 999px;
  padding: 0.45rem 1.2rem;
  font-size: 0.9rem;
  background: linear-gradient(135deg, #ec407a, #ab47bc);
  color: #fff;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(233, 30, 99, 0.35);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.btn-primary:hover {
  box-shadow: 0 12px 30px rgba(233, 30, 99, 0.4);
}

/* نتیجه */
.result {
  border-radius: 16px;
  background: #faf5ff;
  padding: 0.7rem 0.8rem;
  font-size: 0.85rem;
  line-height: 1.7;
  border: 1px solid #e1bee7;
  white-space: pre-line;
}

/* خطا */
.result.error {
  background: #ffebee;
  border-color: #ef9a9a;
  color: #c62828;
}

/* فوتر */
.app-footer {
  margin-top: 1.5rem;
  text-align: center;
  font-size: 0.8rem;
  color: #777;
}

/* انیمیشن */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ریسپانسیو موبایل */
@media (max-width: 640px) {
  .app {
    padding: 1rem 0.75rem 2rem;
  }

  .panels {
    padding: 0.9rem 0.8rem 1.1rem;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }
}