:root {
  --green-dark: #1b5e20;
  --green: #2e7d32;
  --green-light: #66bb6a;
  --bg: #f4f7f2;
  --card-bg: #ffffff;
  --text: #1f2b1f;
  --muted: #6b7a6b;
  --error: #c62828;
  --error-bg: #fdecea;
  --success: #2e7d32;
  --success-bg: #e8f5e9;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Vazirmatn', Tahoma, sans-serif;
  background: var(--bg);
  color: var(--text);
  direction: rtl;
}

.site-header {
  background: linear-gradient(135deg, var(--green-dark), var(--green));
  color: #fff;
  padding: 28px 20px;
  text-align: center;
}
.site-header .logo { font-size: 24px; font-weight: 800; }
.site-header .tagline { font-size: 14px; opacity: 0.9; margin-top: 4px; }

.container {
  max-width: 560px;
  margin: 0 auto;
  padding: 16px;
}

.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
  margin-bottom: 16px;
}

.step { display: none; }
.step.active { display: block; }

h2 { font-size: 18px; margin-top: 0; color: var(--green-dark); }
h3 { font-size: 15px; color: var(--green-dark); }

label {
  display: block;
  font-size: 15px;
  color: var(--muted);
  margin: 14px 0 6px;
}

select, input[type=text], input[type=tel], input[type=file], textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid #dfe6df;
  border-radius: 10px;
  font-family: inherit;
  font-size: 15px;
  background: #fbfdfb;
  color: var(--text);
}
textarea { resize: vertical; }

input[type=range] {
  width: 100%;
  accent-color: var(--green);
  margin-top: 8px;
  -webkit-appearance: none;
  appearance: none;
  height: 34px;
  background: transparent;
  cursor: pointer;
}
/* ردِ اسلایدر */
input[type=range]::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 3px;
  background: #dfe6df;
}
input[type=range]::-moz-range-track {
  height: 6px;
  border-radius: 3px;
  background: #dfe6df;
}
/* دستگیره (دایره) بزرگ‌تر */
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--green);
  border: 3px solid #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
  margin-top: -14px;
  cursor: pointer;
}
input[type=range]::-moz-range-thumb {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--green);
  border: 3px solid #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
  cursor: pointer;
}

/* حباب عددی که روی دستگیره می‌نشیند */
.range-track-wrap {
  position: relative;
}
.range-value-bubble {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 17px;
  transform: translate(-50%, -50%);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 800;
  color: #fff;
  pointer-events: none;
  white-space: nowrap;
}

.range-hints {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--muted);
  margin-top: 2px;
}

.dual-range { margin-top: 8px; }
.range-row { margin-bottom: 16px; }
.range-row:last-child { margin-bottom: 0; }
.range-row-label {
  display: block;
  font-size: 12px;
  color: var(--green-dark);
  font-weight: 600;
  margin-bottom: 4px;
}

.weight-label { color: var(--green-dark); font-weight: 700; }

.price-preview {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg);
  border-radius: 10px;
  padding: 12px 14px;
  margin-top: 14px;
  font-size: 14px;
}
.price-preview strong { color: var(--green-dark); font-size: 17px; }

.price-tier-tag {
  font-weight: 700;
  color: #e65100;
  background: #fff3e0;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 12px;
}

.btn {
  border: none;
  border-radius: 10px;
  padding: 13px 18px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: opacity .15s ease;
}
.btn:active { opacity: 0.8; }
.btn-primary { background: var(--green); color: #fff; }
.btn-secondary { background: #e8f5e9; color: var(--green-dark); width: 100%; margin-top: 14px; }
.btn-outline { background: transparent; color: var(--green-dark); border: 1px solid var(--green-light); }
.btn-block { width: 100%; margin-top: 18px; }
.btn-row { display: flex; gap: 10px; margin-top: 18px; }
.btn-row .btn { flex: 1; }

.cart-wrap { margin-top: 22px; }
.cart-table { width: 100%; border-collapse: collapse; font-size: 13px; margin-top: 8px; }
.cart-table th {
  text-align: right;
  color: var(--muted);
  font-weight: 600;
  padding: 8px 6px;
  border-bottom: 1px solid #e3e9e3;
}
.cart-table td {
  padding: 10px 6px;
  border-bottom: 1px solid #eef2ee;
}
.empty-cell { text-align: center; color: var(--muted); padding: 16px 0; }

.remove-row-btn {
  background: none;
  border: none;
  color: var(--error);
  cursor: pointer;
  font-size: 16px;
}

.cart-total {
  text-align: left;
  margin-top: 10px;
  font-size: 15px;
}
.cart-total strong { color: var(--green-dark); }

.cart-discount-row {
  text-align: left;
  margin-top: 6px;
  font-size: 13px;
  color: var(--error);
}
.cart-discount-row span { font-weight: 700; }

.cart-final-total-row {
  text-align: left;
  margin-top: 6px;
  padding-top: 8px;
  border-top: 1px dashed #dfe6df;
  font-size: 16px;
}
.cart-final-total-row strong { color: var(--green-dark); }

.note-wrap { margin-top: 20px; }

.alert {
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 13px;
  margin-top: 14px;
}
.alert-error { background: var(--error-bg); color: var(--error); }
.alert-success { background: var(--success-bg); color: var(--success); }
.hidden { display: none; }

.form-group { margin-bottom: 6px; }

/* Bank card */
.bank-card {
  background: linear-gradient(135deg, #37474f, #102027);
  color: #fff;
  border-radius: 16px;
  padding: 22px;
  margin-top: 6px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.25);
}
.bank-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  opacity: 0.9;
}
.bank-chip { font-size: 20px; }
.bank-card-number {
  font-size: 22px;
  letter-spacing: 3px;
  margin: 26px 0 18px;
  direction: ltr;
  text-align: center;
  font-weight: 700;
}
.bank-card-bottom { font-size: 13px; opacity: 0.9; }

.payment-note { font-size: 13px; color: var(--muted); margin-top: 14px; line-height: 1.9; }

.receipt-filename { font-size: 12px; color: var(--green-dark); margin-top: 6px; }

.success-box { text-align: center; padding: 20px 0; }
.success-icon { font-size: 44px; }
.success-box p { color: var(--muted); font-size: 14px; line-height: 1.9; }

.site-footer {
  text-align: center;
  font-size: 12px;
  color: var(--muted);
  padding: 20px;
}

@media (min-width: 600px) {
  .container { padding: 24px; }
}