:root {
  --bg: #F3F3F1;
  --card: #E6E6E4;
  --text: #020202;
  --sub: #444444;
  --border: #A5A5A1;
  --track: #C8C8C6;
  --input-bg: #FFFFFF;
  --input-border: #B0BEC5;
  --red: #E9443E;
  --red-dark: #B71C1C;
  --green: #1E824C;
  --amber: #F59E0B;
  --dark-card: #18181B;
  --error-bg: #FFDAD6;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Noto Sans Bengali", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--track);
}
.header-inner {
  max-width: 640px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo { border-radius: 10px; }
.brand { font-size: 20px; font-weight: 700; }
.app-link { margin-left: auto; color: var(--green); text-decoration: none; font-weight: 500; }

.page {
  max-width: 640px;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

h1 { font-size: 24px; line-height: 1.4; margin: 8px 0; }
h2 { font-size: 20px; line-height: 1.4; margin: 0 0 12px; }
.sub { color: var(--sub); margin: 0 0 16px; }

.btn-primary, .btn-secondary, .btn-green {
  width: 100%;
  height: 48px;
  border-radius: 12px;
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
}
.btn-primary { background: var(--red); color: #fff; border: none; }
.btn-primary:active { background: var(--red-dark); }
.btn-primary:disabled { opacity: 0.6; }
.btn-secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-green { background: var(--green); color: #fff; border: none; }
.btn-green:active { opacity: 0.85; }

.plan-cards { display: flex; flex-direction: column; gap: 12px; }
.plan-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--track);
  border-radius: 16px;
  padding: 16px;
  text-align: left;
  font-family: inherit;
  color: var(--text);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.plan-card.selected { border: 2px solid var(--red); }
.plan-name { font-weight: 700; font-size: 16px; }
.plan-price { font-weight: 700; font-size: 20px; }
.plan-note, .plan-term { color: var(--sub); font-size: 14px; }
.plan-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--green);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 999px;
}
.plan-footnote { color: var(--sub); font-size: 14px; }

.steps { margin: 0; padding-left: 24px; display: flex; flex-direction: column; gap: 8px; }
.merchant-box {
  margin-top: 16px;
  background: var(--green);
  color: #fff;
  border-radius: 16px;
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.merchant-label { font-size: 14px; color: #fff; font-weight: 700; }
.merchant-number { font-size: 20px; font-weight: 700; letter-spacing: 0.5px; background: #fff; color: #14532D; padding: 4px 14px; border-radius: 999px; }
.copy-btn {
  margin-left: auto;
  background: transparent;
  color: #fff;
  border: 1px solid #fff;
  border-radius: 999px;
  padding: 6px 16px;
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
}
/* Top toast notification (e.g. after Copy). */
.toast {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  background: var(--green);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  padding: 10px 20px;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}
.warning-box {
  margin-top: 12px;
  background: var(--error-bg);
  border: 1px solid var(--red);
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 14px;
}

.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 700; margin-bottom: 6px; }
.field input, .field select {
  width: 100%;
  height: 48px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 12px;
  padding: 0 12px;
  font-family: inherit;
  font-size: 16px;
  color: var(--text);
}
.field input:focus, .field select:focus { outline: none; border-color: var(--red); }
.field input.input-error, .field select.input-error { border-color: var(--red); }
.help { color: var(--sub); font-size: 14px; margin: 6px 0 0; }
.hp-field { display: none; }
.error-box {
  background: var(--error-bg);
  border: 1px solid var(--red);
  border-radius: 12px;
  padding: 12px 16px;
  margin-bottom: 16px;
  font-size: 14px;
}
.success-box {
  background: #e6f4ea;
  border: 1px solid var(--green);
  border-radius: 16px;
  padding: 16px;
  margin-top: 16px;
}
.success-box h3 { margin: 0 0 8px; }
.success-box .small { font-size: 14px; color: var(--sub); }
#turnstileContainer { margin-bottom: 16px; }

.features-header { text-align: center; margin-bottom: 16px; }
.features-header .logo { margin: 0 auto 8px; }
.features-card {
  background: var(--card);
  border: 1px solid var(--track);
  border-radius: 16px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.feature-row { display: flex; gap: 12px; align-items: flex-start; }
.feature-row svg { width: 24px; height: 24px; flex-shrink: 0; color: var(--red); margin-top: 2px; }
.feature-row strong { display: block; font-size: 16px; }
.feature-row span { display: block; font-size: 14px; color: var(--sub); }
.features-footnote { color: var(--sub); font-size: 14px; margin-top: 12px; }

.site-footer {
  max-width: 640px;
  margin: 0 auto;
  padding: 16px 16px 88px;
  border-top: 1px solid var(--track);
  text-align: center;
  color: var(--sub);
  font-size: 14px;
}

/* WhatsApp support floating button + popup (bottom-right corner). */
.wa-wrap {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}
.wa-float {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #25D366;
  border: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
}
.wa-float img { width: 28px; height: 28px; }
.wa-popup {
  width: 280px;
  background: var(--input-bg);
  border: 1px solid var(--track);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  position: relative;
}
.wa-popup-title { font-weight: 700; font-size: 17px; margin-bottom: 6px; }
.wa-popup-text { color: var(--sub); font-size: 14px; margin: 0 0 12px; }
.wa-popup-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  background: #25D366;
  color: #fff;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  font-size: 15px;
}
.wa-close {
  position: absolute;
  top: 8px;
  right: 10px;
  background: none;
  border: none;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  color: var(--sub);
  padding: 4px;
}
.site-footer a { color: var(--green); text-decoration: none; }
.site-footer p { margin: 4px 0; }