@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&display=swap');

:root {
  --bg-gradient: linear-gradient(135deg, #0f0f0f, #1f1f1f);
  --card-bg: rgba(255,255,255,0.05);
  --card-border: rgba(255,255,255,0.15);
  --accent-white: #ffffff;
  --text-light: #ececec;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Poppins', sans-serif;
  background: var(--bg-gradient);
  color: var(--text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}

.control-panel {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  backdrop-filter: blur(20px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.6);
  width: 100%;
  max-width: 420px;
  padding: 2rem;
}

/* IMAGE PLACEHOLDER */
.image-placeholder {
  width: 100%;
  height: 140px;
  background: rgba(255,255,255,0.1);
  border: 1px dashed rgba(255,255,255,0.3);
  border-radius: 12px;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: 0.9rem;
}

.heading h1 {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--accent-white);
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text-light);
}

input[type="email"],
input[type="tel"],
input[type="text"],
input[readonly] {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px;
  background: rgba(255,255,255,0.1);
  color: var(--text-light);
  font-size: 1rem;
  transition: border-color 0.3s, background 0.3s;
}

input:focus {
  outline: none;
  border-color: var(--accent-white);
  background: rgba(255,255,255,0.15);
}

.checkbox_group {
  display: flex;
  gap: 1rem;
}

.checkbox_group label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-weight: 500;
}

input[type="radio"] {
  accent-color: var(--accent-white);
  width: 1.2rem;
  height: 1.2rem;
}

.btn-pay {
  width: 100%;
  padding: 0.75rem;
  background: var(--accent-white);
  color: #0f0f0f;
  border: none;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s;
}

.btn-pay:hover {
  background: rgba(255,255,255,0.8);
  transform: translateY(-2px);
}

/* MODAL STYLES */
.modal {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.7);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

.modal-content {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  backdrop-filter: blur(20px);
  padding: 2rem;
  width: 90%;
  max-width: 360px;
  text-align: center;
  box-shadow: 0 6px 24px rgba(0,0,0,0.6);
}

.modal-content h2 {
  color: var(--accent-white);
  margin-bottom: 1rem;
}

.modal-content p {
  margin-bottom: 1rem;
  color: var(--text-light);
}

.ref-box {
  display: flex;
  gap: 0.5rem;
}

.copy-button {
  background: var(--accent-white);
  color: #0f0f0f;
  border: none;
  border-radius: 8px;
  padding: 0.5rem 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s;
}

.copy-button:hover {
  background: rgba(255,255,255,0.8);
}

.close-btn {
  position: absolute;
  top: 1rem; right: 1rem;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text-light);
}

@media (max-width: 480px) {
  .control-panel { padding: 1.5rem; }
  .heading h1 { font-size: 1.6rem; }
  .btn-pay { font-size: 1rem; }
}