/* ============================================
   REFERRAL PROGRAM — Clean Minimalist Light
   Playfair Display + Inter | White + Slate
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,700;0,800;1,700&family=Inter:wght@300;400;500;600&display=swap');

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

:root {
  --bg:        #f7f7f5;
  --surface:   #ffffff;
  --border:    #e8e8e4;
  --border-hi: #d4d4ce;
  --accent:    #2563eb;
  --accent-lt: #eff4ff;
  --text-1:    #18181b;
  --text-2:    #71717a;
  --text-3:    #a1a1aa;
  --green:     #16a34a;
  --green-lt:  #f0fdf4;
  --red:       #dc2626;
  --red-lt:    #fef2f2;
  --radius:    14px;
  --radius-sm: 10px;
  --shadow:    0 1px 3px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 4px 6px rgba(0,0,0,0.04), 0 12px 40px rgba(0,0,0,0.1);
}

html { height: 100%; font-size: 18px; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text-1);
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1.25rem;
}

/* Subtle dot grid */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle, rgba(0,0,0,0.07) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
  z-index: 0;
}

/* Hide old decorative elements */
.noise, .corner-mark { display: none; }

/* ---- Container ---- */
.container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  animation: fadeUp 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Header ---- */
.header {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-lt);
  border: 1px solid rgba(37,99,235,0.15);
  padding: 5px 12px;
  border-radius: 100px;
  width: fit-content;
}
.badge::before {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s ease infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.35; }
}

h2 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2rem, 9vw, 2.75rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--text-1);
}
h2 span {
  color: var(--accent);
  font-style: italic;
}

.subtitle {
  font-size: 0.9rem;
  color: var(--text-2);
  line-height: 1.7;
}
.subtitle strong {
  color: var(--text-1);
  font-weight: 500;
}

.rewards {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 2px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-2);
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
  transition: border-color 0.2s, color 0.2s, box-shadow 0.2s;
}
.pill:hover {
  border-color: var(--border-hi);
  color: var(--text-1);
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.pill-icon { font-size: 0.9rem; }

/* ---- Card ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: var(--shadow);
  transition: box-shadow 0.3s;
}
.card:focus-within {
  box-shadow: var(--shadow-lg);
}

/* ---- Label ---- */
label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: 0.02em;
}

/* ---- Input ---- */
.input-wrap { position: relative; }

input[type="email"] {
  width: 100%;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.8rem 2.6rem 0.8rem 1rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.925rem;
  color: var(--text-1);
  outline: none;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
}
input[type="email"]::placeholder { color: var(--text-3); }
input[type="email"]:focus {
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(37,99,235,0.08);
}

.input-icon {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  color: var(--text-3);
  pointer-events: none;
  transition: color 0.2s;
}
.input-wrap:focus-within .input-icon { color: var(--accent); }

/* ---- Button ---- */
button#btn {
  width: 100%;
  background: var(--text-1);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.875rem 1.5rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
}
button#btn:hover {
  background: #27272a;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}
button#btn:active { transform: translateY(0); box-shadow: none; }
button#btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.btn-inner span:last-child { transition: transform 0.2s; }
button#btn:hover .btn-inner span:last-child { transform: translateX(4px); }

/* ---- Message ---- */
#msg {
  font-size: 0.83rem;
  line-height: 1.5;
  min-height: 1.2em;
  text-align: center;
  border-radius: 8px;
  padding: 0;
  transition: all 0.25s;
}
#msg:not(:empty) { padding: 10px 14px; }
#msg.ok {
  background: var(--green-lt);
  border: 1px solid rgba(22,163,74,0.2);
  color: var(--green);
}
#msg.err {
  background: var(--red-lt);
  border: 1px solid rgba(220,38,38,0.2);
  color: var(--red);
}

/* ---- Divider ---- */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0.25rem 0;
}

/* ---- Steps ---- */
.steps {
  display: flex;
  align-items: flex-start;
}

.step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  position: relative;
}
.step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 15px;
  left: 62%; right: -38%;
  height: 1px;
  background: var(--border);
}

.step-num {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--accent-lt);
  border: 1.5px solid rgba(37,99,235,0.2);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.step-label {
  font-size: 0.73rem;
  color: var(--text-2);
  line-height: 1.4;
  max-width: 80px;
}

/* ---- Footer ---- */
.footer {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-3);
}

/* ---- Responsive ---- */
@media (max-width: 480px) {
  body { padding: 1.5rem 1rem; align-items: flex-start; }
  .card { padding: 1.5rem; }
}