/* ═══════════════════════════════════════════════
   SMART BANDAGE AI — AUTH SCREENS (auth.css)
   Welcome · Login · Multi-step Register
   ═══════════════════════════════════════════════ */

/* ── AUTH WRAPPER ──────────────────────────── */
.auth-screen {
  position: fixed; inset: 0; z-index: 500;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg);
  overflow-y: auto;
  padding: 20px;
}
.auth-screen.hidden { display: none !important; }

/* Animated gradient background */
.auth-screen::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 120% 80% at 20% 10%, rgba(0,229,160,0.12) 0%, transparent 50%),
    radial-gradient(ellipse 80% 60% at 80% 90%, rgba(124,58,237,0.10) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 50% 50%, rgba(0,212,200,0.06) 0%, transparent 50%);
  animation: authBgShift 12s ease-in-out infinite alternate;
}

@keyframes authBgShift {
  0%   { transform: scale(1)   rotate(0deg); }
  50%  { transform: scale(1.1) rotate(2deg); }
  100% { transform: scale(1)   rotate(-1deg); }
}

/* ── WELCOME SCREEN ───────────────────────── */
.welcome-container {
  position: relative; z-index: 1;
  display: flex; flex-direction: column; align-items: center;
  text-align: center; gap: 32px;
  max-width: 440px; width: 100%;
  animation: fadeSlideUp .6s ease;
}

.welcome-logo {
  width: 96px; height: 96px;
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(0,229,160,0.2), rgba(0,212,200,0.1));
  border: 2px solid rgba(0,229,160,0.3);
  display: flex; align-items: center; justify-content: center;
  animation: logoPulseAuth 3s ease infinite;
  box-shadow: 0 0 60px rgba(0,229,160,0.15);
}

@keyframes logoPulseAuth {
  0%,100% { box-shadow: 0 0 40px rgba(0,229,160,0.15), 0 0 0 0 rgba(0,229,160,0.3); }
  50%     { box-shadow: 0 0 60px rgba(0,229,160,0.25), 0 0 0 12px rgba(0,229,160,0); }
}

.welcome-title {
  font-family: var(--font-head);
  font-size: 32px; font-weight: 700;
  background: linear-gradient(135deg, var(--text), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.welcome-sub {
  font-size: 15px; color: var(--text-muted);
  line-height: 1.6; max-width: 340px;
}

.welcome-features {
  display: flex; gap: 16px; flex-wrap: wrap; justify-content: center;
}

.welcome-feat {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 16px; border-radius: 99px;
  background: var(--surface2); border: 1px solid var(--border);
  font-size: 12px; color: var(--text-muted); font-weight: 500;
}
.welcome-feat-icon {
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--green-dim);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px;
}

.welcome-actions {
  display: flex; flex-direction: column; gap: 12px;
  width: 100%; max-width: 320px;
}

.btn-get-started {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  width: 100%; padding: 16px; border-radius: var(--radius);
  background: linear-gradient(135deg, var(--green), var(--teal));
  color: #060d1f; font-weight: 700; font-size: 15px;
  border: none; cursor: pointer;
  transition: all .25s;
  box-shadow: 0 6px 28px rgba(0,229,160,0.35);
}
.btn-get-started:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 40px rgba(0,229,160,0.45);
}
.btn-get-started:active { transform: translateY(0); }

.btn-login-link {
  padding: 12px; border-radius: var(--radius);
  background: transparent; color: var(--text-muted);
  font-size: 14px; font-weight: 500;
  border: 1px solid var(--border);
  cursor: pointer; transition: all .2s;
}
.btn-login-link:hover { color: var(--green); border-color: var(--green); }

.welcome-version {
  font-size: 11px; color: var(--text-dim);
  margin-top: 8px;
}

/* ── AUTH CARD (Login + Register) ──────────── */
.auth-card {
  position: relative; z-index: 1;
  background: rgba(13,25,41,0.85);
  border: 1px solid var(--border2);
  border-radius: var(--radius-xl);
  width: 100%; max-width: 460px;
  backdrop-filter: blur(20px);
  box-shadow: 0 16px 64px rgba(0,0,0,0.5);
  animation: fadeSlideUp .4s ease;
  overflow: hidden;
}

.auth-card-header {
  padding: 28px 28px 0;
  display: flex; flex-direction: column; gap: 6px;
}
.auth-card-header .auth-back {
  align-self: flex-start;
  display: flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: 99px;
  background: var(--surface2); border: 1px solid var(--border);
  color: var(--text-muted); font-size: 12px; font-weight: 500;
  cursor: pointer; transition: all .2s; margin-bottom: 12px;
}
.auth-card-header .auth-back:hover { color: var(--green); border-color: var(--green); }

.auth-card-title {
  font-family: var(--font-head);
  font-size: 22px; font-weight: 700; color: var(--text);
}
.auth-card-sub {
  font-size: 13px; color: var(--text-muted); line-height: 1.5;
}

/* ── STEP PROGRESS ────────────────────────── */
.step-progress {
  display: flex; align-items: center; justify-content: center;
  gap: 8px; padding: 20px 28px 0;
}
.step-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--surface3); border: 1.5px solid var(--border2);
  transition: all .3s;
}
.step-dot.active {
  background: var(--green); border-color: var(--green);
  box-shadow: 0 0 12px rgba(0,229,160,0.5);
}
.step-dot.completed {
  background: var(--green-dark); border-color: var(--green-dark);
}
.step-line {
  width: 40px; height: 2px; border-radius: 99px;
  background: var(--border); transition: background .3s;
}
.step-line.completed { background: var(--green-dark); }

/* ── AUTH FORM BODY ───────────────────────── */
.auth-body {
  padding: 24px 28px 28px;
  display: flex; flex-direction: column; gap: 18px;
}

.auth-field {
  display: flex; flex-direction: column; gap: 6px;
}
.auth-field label {
  font-size: 12px; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .5px;
}
.auth-field input,
.auth-field select,
.auth-field textarea {
  width: 100%; padding: 12px 14px; border-radius: var(--radius-sm);
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border);
  font-size: 14px; font-family: var(--font-body);
  transition: border-color .2s, box-shadow .2s;
}
.auth-field input:focus,
.auth-field select:focus,
.auth-field textarea:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 3px var(--green-dim);
}
.auth-field input::placeholder { color: var(--text-dim); }
.auth-field textarea { resize: vertical; min-height: 60px; }
.auth-field .field-error {
  font-size: 11px; color: var(--danger); display: none;
}
.auth-field.error input,
.auth-field.error select {
  border-color: var(--danger);
}
.auth-field.error .field-error { display: block; }

.auth-field-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
}

/* Role selector cards */
.role-selector {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
}
.role-option {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding: 14px 10px; border-radius: var(--radius-sm);
  background: var(--surface); border: 1.5px solid var(--border);
  cursor: pointer; transition: all .25s;
  color: var(--text-muted); font-size: 12px; font-weight: 600;
}
.role-option:hover { border-color: var(--border2); color: var(--text); }
.role-option.selected {
  border-color: var(--green);
  background: var(--green-dim);
  color: var(--green);
  box-shadow: 0 0 16px rgba(0,229,160,0.15);
}
.role-option-icon {
  font-size: 24px;
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--surface2);
  display: flex; align-items: center; justify-content: center;
  transition: background .25s;
}
.role-option.selected .role-option-icon {
  background: rgba(0,229,160,0.15);
}

/* Connection preference cards */
.conn-selector {
  display: flex; flex-direction: column; gap: 10px;
}
.conn-option {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px; border-radius: var(--radius-sm);
  background: var(--surface); border: 1.5px solid var(--border);
  cursor: pointer; transition: all .25s;
  color: var(--text); font-size: 13px;
}
.conn-option:hover { border-color: var(--border2); }
.conn-option.selected {
  border-color: var(--green);
  background: var(--green-dim);
  box-shadow: 0 0 16px rgba(0,229,160,0.15);
}
.conn-option-icon { font-size: 22px; flex-shrink: 0; }
.conn-option-text { display: flex; flex-direction: column; }
.conn-option-text strong { font-weight: 600; font-size: 13px; }
.conn-option-text small { font-size: 11px; color: var(--text-muted); }

/* Review summary */
.review-summary {
  display: flex; flex-direction: column; gap: 10px;
  padding: 16px; border-radius: var(--radius-sm);
  background: var(--surface); border: 1px solid var(--border);
}
.review-row {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px;
}
.review-row .review-label { color: var(--text-muted); }
.review-row .review-value { color: var(--text); font-weight: 600; }

/* ── PIN INPUT ────────────────────────────── */
.pin-input-group {
  display: flex; gap: 12px; justify-content: center;
}
.pin-digit {
  width: 56px; height: 64px;
  text-align: center; font-size: 24px; font-weight: 700;
  font-family: var(--font-head);
  background: var(--bg); color: var(--text);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color .2s, box-shadow .2s;
}
.pin-digit:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 3px var(--green-dim);
}

/* ── AUTH BUTTONS ──────────────────────────── */
.auth-actions {
  display: flex; flex-direction: column; gap: 10px;
  margin-top: 4px;
}

.btn-auth-primary {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; padding: 14px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--green), var(--teal));
  color: #060d1f; font-weight: 700; font-size: 14px;
  border: none; cursor: pointer;
  transition: all .25s;
  box-shadow: 0 4px 20px rgba(0,229,160,0.3);
}
.btn-auth-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 28px rgba(0,229,160,0.45); }
.btn-auth-primary:active { transform: translateY(0); }
.btn-auth-primary:disabled { opacity: .4; pointer-events: none; }

.btn-auth-secondary {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; padding: 12px; border-radius: var(--radius-sm);
  background: transparent; color: var(--text-muted);
  font-size: 13px; font-weight: 500;
  border: 1px solid var(--border);
  cursor: pointer; transition: all .2s;
}
.btn-auth-secondary:hover { color: var(--text); border-color: var(--border2); }

/* ── AUTH DIVIDER ─────────────────────────── */
.auth-divider {
  display: flex; align-items: center; gap: 12px;
  font-size: 11px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 1px;
}
.auth-divider::before, .auth-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}

/* ── ANIMATIONS ───────────────────────────── */
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeSlideLeft {
  from { opacity: 0; transform: translateX(30px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes fadeSlideRight {
  from { opacity: 0; transform: translateX(-30px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* Step transition */
.auth-step { display: none; }
.auth-step.active { display: flex; flex-direction: column; gap: 18px; animation: fadeSlideLeft .35s ease; }

/* ── MOBILE ADJUSTMENTS ───────────────────── */
@media (max-width: 768px) {
  .auth-card {
    max-width: 100%;
    border-radius: var(--radius-lg);
  }
  .auth-card-header { padding: 22px 20px 0; }
  .auth-body { padding: 20px 20px 24px; }
  .auth-card-title { font-size: 20px; }
  .welcome-title { font-size: 26px; }
  .pin-digit { width: 48px; height: 56px; font-size: 20px; }
  .auth-field-row { grid-template-columns: 1fr; }
}

@media (max-width: 420px) {
  .welcome-features { flex-direction: column; align-items: center; }
  .pin-digit { width: 44px; height: 50px; font-size: 18px; }
  .role-selector { grid-template-columns: 1fr 1fr; gap: 8px; }
}