:root {
  --wa-dark: #0B141A;
  --wa-teal-dark: #075E54;
  --wa-teal: #128C7E;
  --wa-green: #25D366;
  --wa-green-dim: #1DA851;
  --wa-bubble: #DCF8C6;
  --wa-blue-tick: #34B7F1;
  --paper: #F0F2F5;
  --text-dark: #111B21;
  --muted: #667781;
  --hairline: #E9EDEF;
}
* { font-family: 'Inter', sans-serif; }
.font-display { font-family: 'Space Grotesk', sans-serif; }

body { background: var(--paper); min-height: 100vh; }

.brand-panel {
  position: relative;
  background: linear-gradient(165deg, var(--wa-teal-dark) 0%, var(--wa-teal) 60%, var(--wa-teal-dark) 100%);
  overflow: hidden;
  min-height: 100vh;
}
.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.32;
  pointer-events: none;
}
.glow-1 { width: 340px; height: 340px; background: var(--wa-green); top: -80px; left: -60px; }
.glow-2 { width: 280px; height: 280px; background: var(--wa-green); bottom: 40px; right: -60px; opacity: 0.2; }

.logo-card {
  background: #fff;
  border-radius: 14px;
  padding: 14px 20px;
  display: inline-block;
  box-shadow: 0 10px 30px -12px rgba(0,0,0,0.4);
}
.logo-card img { display: block; height: 34px; width: auto; }

.thread-panel {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  backdrop-filter: blur(6px);
  padding: 20px;
}
.bubble-wa {
  background: var(--wa-bubble);
  border-radius: 8px;
  padding: 8px 12px;
  display: inline-block;
  max-width: 100%;
}

.form-side {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: #fff;
  border-radius: 20px;
  padding: 44px 40px;
  box-shadow: 0 1px 2px rgba(17,27,33,0.04), 0 20px 45px -20px rgba(17,27,33,0.18);
  border: 1px solid rgba(17,27,33,0.05);
}

.input-group-wa {
  border: 1.5px solid var(--hairline);
  border-radius: 10px;
  overflow: hidden;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.input-group-wa:focus-within {
  border-color: var(--wa-green);
  box-shadow: 0 0 0 3px rgba(37,211,102,0.15);
}
.input-group-wa .input-group-text {
  background: #fff;
  border: none;
  color: var(--muted);
}
.input-group-wa .form-control {
  border: none;
  box-shadow: none;
  padding-left: 0;
  font-size: 15px;
}
.input-group-wa .form-control:focus { box-shadow: none; }
.toggle-visibility { background: #fff; border: none; color: var(--muted); cursor: pointer; }
.is-invalid-group { border-color: #dc3545 !important; }

/* ── Button — fixed: horizontal padding restored (was 0, causing
   clipped text on any non-full-width button), shadow toned down
   so it reads as elevation rather than a glow/halo. ── */
.btn-wa {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: linear-gradient(135deg, var(--wa-green), var(--wa-green-dim));
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 12px 22px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.2;
  white-space: nowrap;
  transition: transform .12s ease, box-shadow .2s ease;
  box-shadow: 0 4px 10px -4px rgba(37,211,102,0.45);
}
.btn-wa:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 14px -4px rgba(37,211,102,0.5);
  color: #fff;
}
.btn-wa:active { transform: translateY(0); }
.btn-wa.btn-sm {
  padding: 7px 14px;
  font-size: 13.5px;
  border-radius: 8px;
  box-shadow: 0 3px 8px -4px rgba(37,211,102,0.4);
}

.form-check-input:checked { background-color: var(--wa-green); border-color: var(--wa-green); }

a.link-wa { color: var(--wa-teal); text-decoration: none; font-weight: 500; }
a.link-wa:hover { text-decoration: underline; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

@media (max-width: 991.98px) {
  .brand-panel { min-height: auto; padding-bottom: 3rem; }
  .form-side { min-height: auto; padding: 2.5rem 1rem; }
}