/* ==========================================================================
   Planexa — Premium App Lock Screen (Enterprise Grade)
   --------------------------------------------------------------------------
   Design system aligned with css/planexa.css (landing) and css/login.css (auth)
   Tokens mirror the landing page's dark-only palette for maximum contrast.
   ========================================================================== */

:root {
  /* Lock screen specific tokens (dark-only, high contrast) */
  --lock-bg: #070B12;
  --lock-bg-elevated: #0A0F18;
  --lock-surface: #0D1420;
  --lock-surface-2: #111A28;
  --lock-surface-3: #16202F;
  --lock-surface-glass: rgba(13, 20, 32, 0.72);

  --lock-border: #1B2637;
  --lock-border-soft: rgba(148, 163, 184, 0.08);
  --lock-border-strong: #263449;
  --lock-border-glass: rgba(148, 163, 184, 0.14);

  --lock-text: #F2F5F9;
  --lock-text-soft: #C3CCDA;
  --lock-text-muted: #8B97A9;
  --lock-text-faint: #64748B;

  --lock-accent: #5B7CFA;
  --lock-accent-hover: #6E8CFF;
  --lock-accent-soft: rgba(91, 124, 250, 0.12);
  --lock-accent-border: rgba(91, 124, 250, 0.28);
  --lock-accent-glow: rgba(91, 124, 250, 0.35);

  --lock-green: #3FB984;
  --lock-green-soft: rgba(63, 185, 132, 0.12);
  --lock-amber: #D6A14A;
  --lock-red: #F87171;
  --lock-red-soft: rgba(248, 113, 113, 0.12);

  --lock-shadow-sm: 0 1px 2px rgba(2, 6, 23, 0.4);
  --lock-shadow-md: 0 12px 34px -14px rgba(2, 6, 23, 0.8);
  --lock-shadow-lg: 0 50px 100px -50px rgba(2, 6, 23, 0.95);
  --lock-shadow-glow: 0 0 48px var(--lock-accent-glow);
  --lock-ring: 0 0 0 4px var(--lock-accent-soft);

  --lock-r-xs: 6px;
  --lock-r-sm: 8px;
  --lock-r-md: 10px;
  --lock-r-lg: 14px;
  --lock-r-xl: 18px;
  --lock-r-2xl: 24px;
  --lock-r-pill: 999px;

  --lock-1: 4px;
  --lock-2: 8px;
  --lock-3: 12px;
  --lock-4: 16px;
  --lock-5: 20px;
  --lock-6: 24px;
  --lock-8: 32px;
  --lock-10: 40px;
  --lock-12: 48px;

  --lock-t-fast: 140ms cubic-bezier(0.4, 0, 0.2, 1);
  --lock-t: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --lock-t-slow: 320ms cubic-bezier(0.16, 1, 0.3, 1);
  --lock-t-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);

  --lock-font: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.lock-overlay {
  position: fixed;
  inset: 0;
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--lock-4);
  background: var(--lock-bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(91, 124, 250, 0.18), transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(139, 124, 246, 0.1), transparent 50%);
  animation: lock-fade-in var(--lock-t-slow) ease-out both;
}

@keyframes lock-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Backdrop glass layer */
.lock-overlay::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--lock-surface-glass);
  backdrop-filter: blur(24px) saturate(150%);
  -webkit-backdrop-filter: blur(24px) saturate(150%);
  z-index: -1;
}

/* ==========================================================================
   Lock Card
   ========================================================================== */
.lock-card {
  width: 100%;
  max-width: 420px;
  padding: var(--lock-10) var(--lock-8);
  border: 1px solid var(--lock-border);
  border-radius: var(--lock-r-2xl);
  background: var(--lock-surface);
  box-shadow: var(--lock-shadow-lg), var(--lock-shadow-glow);
  text-align: center;
  animation: lock-card-enter var(--lock-t-spring) both;
  position: relative;
  overflow: hidden;
}

@keyframes lock-card-enter {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Subtle top accent border */
.lock-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg,
    var(--lock-accent) 0%,
    #8B7CF6 50%,
    var(--lock-accent) 100%
  );
  background-size: 200% 100%;
  animation: lock-accent-shift 4s ease-in-out infinite;
}

@keyframes lock-accent-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ==========================================================================
   Header Section
   ========================================================================== */
.lock-header {
  margin-bottom: var(--lock-6);
}

.lock-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--lock-4);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--lock-r-xl);
  background: var(--lock-accent-soft);
  border: 1px solid var(--lock-accent-border);
  color: var(--lock-accent);
  animation: lock-icon-pulse 3s ease-in-out infinite;
}

@keyframes lock-icon-pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 var(--lock-accent-glow);
  }
  50% {
    box-shadow: 0 0 0 8px transparent;
  }
}

.lock-icon svg {
  width: 28px;
  height: 28px;
}

.lock-title {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--lock-text);
  margin-bottom: var(--lock-2);
}

.lock-subtitle {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--lock-text-muted);
  max-width: 300px;
  margin: 0 auto;
}

/* Security badge row */
.lock-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--lock-5);
  margin-top: var(--lock-6);
  padding-top: var(--lock-5);
  border-top: 1px solid var(--lock-border-soft);
}

.lock-trust__item {
  display: inline-flex;
  align-items: center;
  gap: var(--lock-2);
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--lock-text-faint);
  white-space: nowrap;
}

.lock-trust__item svg {
  width: 12px;
  height: 12px;
  color: var(--lock-green);
  flex-shrink: 0;
}

/* ==========================================================================
   Password Input
   ========================================================================== */
.lock-passcode {
  margin-top: var(--lock-8);
}

.lock-passcode__label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--lock-text-faint);
  margin-bottom: var(--lock-4);
  text-align: left;
}

.lock-passcode__input {
  display: block;
  width: 100%;
  min-height: 48px;
  padding: 0 var(--lock-4);
  border: 1px solid var(--lock-border-strong);
  border-radius: var(--lock-r-md);
  background: var(--lock-bg-elevated);
  color: var(--lock-text);
  font: inherit;
  letter-spacing: 0.02em;
  outline: none;
  transition: border-color var(--lock-t-fast), box-shadow var(--lock-t-fast);
}

.lock-passcode__input:focus {
  border-color: var(--lock-accent);
  box-shadow: var(--lock-ring);
}

.lock-passcode__input:disabled {
  opacity: 0.7;
}

/* ==========================================================================
   Error State
   ========================================================================== */
.lock-error {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--lock-2);
  min-height: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--lock-red);
  animation: lock-error-enter var(--lock-t-fast) ease-out both;
}

@keyframes lock-error-enter {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.lock-error svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.lock-error[hidden] {
  display: none;
}

/* ==========================================================================
   Actions
   ========================================================================== */
.lock-actions {
  display: flex;
  flex-direction: column;
  gap: var(--lock-3);
  margin-top: var(--lock-8);
}

.lock-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--lock-2);
  height: 48px;
  width: 100%;
  padding-inline: var(--lock-6);
  border: 1px solid transparent;
  border-radius: var(--lock-r-lg);
  font-family: var(--lock-font);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--lock-t-fast);
}

.lock-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.lock-btn--primary {
  background: var(--lock-accent);
  color: #FFFFFF;
  box-shadow: var(--lock-shadow-sm), 0 0 0 1px var(--lock-accent-border);
}

.lock-btn--primary:hover:not(:disabled) {
  background: var(--lock-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 28px -8px var(--lock-accent-glow), 0 0 0 1px var(--lock-accent-border);
}

.lock-btn--primary:active:not(:disabled) {
  transform: translateY(0);
}

.lock-btn--secondary {
  background: var(--lock-surface-2);
  border-color: var(--lock-border);
  color: var(--lock-text-soft);
}

.lock-btn--secondary:hover:not(:disabled) {
  background: var(--lock-surface-3);
  border-color: var(--lock-border-strong);
  color: var(--lock-text);
}

/* Forgot/Cancel link button */
.lock-btn--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--lock-text-muted);
  font-weight: 500;
  height: 40px;
}

.lock-btn--ghost:hover:not(:disabled) {
  color: var(--lock-text);
  background: var(--lock-surface-2);
}

/* ==========================================================================
   Biometric / Alternative Auth Row
   ========================================================================== */
.lock-alternatives {
  margin-top: var(--lock-8);
  padding-top: var(--lock-6);
  border-top: 1px solid var(--lock-border-soft);
}

.lock-divider {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--lock-5);
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lock-text-faint);
}

.lock-divider::before,
.lock-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--lock-border-soft);
}

.lock-divider span {
  padding-inline: var(--lock-4);
  background: var(--lock-surface);
}

.lock-biometric {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--lock-3);
  width: 100%;
  padding: var(--lock-3) var(--lock-5);
  border: 1px solid var(--lock-border);
  border-radius: var(--lock-r-lg);
  background: var(--lock-surface-2);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--lock-text-soft);
  cursor: pointer;
  transition: all var(--lock-t-fast);
}

.lock-biometric:hover {
  border-color: var(--lock-accent-border);
  background: var(--lock-accent-soft);
  color: var(--lock-accent);
}

.lock-biometric:focus-visible {
  outline: 2px solid var(--lock-accent);
  outline-offset: 2px;
}

.lock-biometric svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* ==========================================================================
   Device Info / Session Context
   ========================================================================== */
.lock-context {
  margin-top: var(--lock-8);
  padding-top: var(--lock-6);
  border-top: 1px solid var(--lock-border-soft);
}

.lock-context__item {
  display: inline-flex;
  align-items: center;
  gap: var(--lock-2);
  font-size: 0.6875rem;
  color: var(--lock-text-faint);
}

.lock-context__item + .lock-context__item {
  margin-top: var(--lock-2);
}

.lock-context__item svg {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
}

/* ==========================================================================
   Loading / Verifying State
   ========================================================================== */
.lock-btn--loading {
  position: relative;
  color: transparent !important;
}

.lock-btn--loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top-color: #FFFFFF;
  border-radius: 50%;
  animation: lock-spin 0.8s linear infinite;
}

@keyframes lock-spin {
  to { transform: rotate(360deg); }
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  .lock-overlay,
  .lock-card,
  .lock-icon,
  .lock-error,
  .lock-btn--loading::after {
    animation: none !important;
    transition-duration: 0.01ms !important;
  }
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 480px) {
  .lock-overlay {
    padding: var(--lock-3);
    align-items: stretch;
  }

  .lock-card {
    max-width: 100%;
    padding: var(--lock-8) var(--lock-5);
    border-radius: var(--lock-r-xl);
    min-height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .lock-icon {
    width: 56px;
    height: 56px;
  }

  .lock-icon svg {
    width: 24px;
    height: 24px;
  }

  .lock-trust {
    flex-wrap: wrap;
    gap: var(--lock-3);
  }

  .lock-btn {
    height: 44px;
    font-size: 0.875rem;
  }
}

@media (max-width: 360px) {
}

/* ==========================================================================
   High Contrast Mode
   ========================================================================== */
@media (prefers-contrast: more) {
  .lock-card {
    border-width: 2px;
  }



  .lock-btn {
    border-width: 2px;
  }
}

/* ==========================================================================
   Print
   ========================================================================== */
@media print {
  .lock-overlay { display: none !important; }
}