/**
 * Aira Antivirus — Reusable Design System Primitives
 * Premium Cybersecurity × AI Infrastructure
 * Strictly adhering to frontend-design, frontend-ui-engineering, better-colors, better-accessibility
 */

/* ==========================================================================
   1. Buttons (Primary, Secondary, Ghost, Icon Buttons)
   All meet min hit targets (44px touch, 40px desktop) and visible focus rings
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: var(--hit-target-desktop);
  padding: var(--space-2) var(--space-5);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  line-height: var(--leading-none);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  position: relative;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

/* Button Touch-device & mobile resilience */
@media (pointer: coarse) {
  .btn {
    min-height: var(--hit-target-min);
    padding-inline: var(--space-6);
  }
}

.btn {
  max-width: 100%;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent-400);
  outline-offset: 2px;
  box-shadow: var(--focus-ring);
}

/* Primary Button: Tactile Cyber-Blue with Laser Sheen (Variant B) */
.btn--primary,
.btn--primary:hover,
.btn--primary:active,
.btn--primary:focus-visible {
  color: #ffffff;
}

.btn--primary {
  position: relative;
  background: linear-gradient(180deg, #3b66ff 0%, #254ee0 100%);
  color: #ffffff;
  border: 1px solid rgba(147, 197, 253, 0.28);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.25);
  overflow: hidden;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.btn--primary svg {
  color: #ffffff;
  stroke: currentColor;
  opacity: 1;
}

.btn--primary::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -60%;
  width: 40%;
  height: 200%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: rotate(25deg);
  pointer-events: none;
  transition: none;
}

.btn--primary:hover {
  transform: none;
  color: #ffffff;
  border-color: rgba(147, 197, 253, 0.6);
  box-shadow: 0 4px 18px rgba(59, 102, 255, 0.35);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.btn--primary:hover span,
.btn--primary:hover svg {
  color: #ffffff;
  opacity: 1;
}

.btn--primary:hover::before {
  left: 140%;
  transition: left 0.85s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn--primary:active {
  transform: none;
  color: #ffffff;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

@media (prefers-reduced-motion: reduce) {
  .btn--primary::before {
    display: none;
  }
}

/* Secondary Button: Technical Slate Surface with Hairline Border */
.btn--secondary {
  background-color: var(--surface-interactive);
  color: var(--text-primary);
  border-color: var(--border-default);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.btn--secondary:hover {
  background-color: var(--surface-interactive-hover);
  color: #ffffff;
  border-color: var(--border-strong);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  transform: none;
}

.btn--secondary:active {
  background-color: var(--surface-interactive-active);
  transform: none;
}

/* Button Sizing Variations */
.btn--sm {
  min-height: 34px;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  border-radius: var(--radius-sm);
}

.btn--lg {
  min-height: 48px;
  padding: var(--space-3) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-md);
}

/* ==========================================================================
   2. Badge Primitive
   Refined status and telemetry tags with accessible indicators
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-normal);
  line-height: var(--leading-none);
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  background-color: var(--surface-card);
  color: var(--text-secondary);
  white-space: nowrap;
}

/* Badge Status Dot */
.badge__dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: currentColor;
  flex-shrink: 0;
  position: relative;
}

/* Pulse animation for active telemetry */
.badge__dot--pulse::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background-color: inherit;
  opacity: 0.5;
  animation: badge-pulse 2.2s ease-out infinite;
}

@keyframes badge-pulse {
  0%   { transform: scale(1); opacity: 0.7; }
  70%  { transform: scale(2.4); opacity: 0; }
  100% { transform: scale(2.4); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .badge__dot--pulse::after {
    animation: none;
    display: none;
  }
}

/* Badge Variants */
.badge--accent {
  background-color: var(--surface-accent-subtle);
  border-color: var(--border-accent);
  color: var(--color-accent-300);
}

.badge--secure {
  background-color: rgba(16, 185, 129, 0.08);
  border-color: var(--border-status-secure);
  color: var(--status-secure);
}

.badge--warning {
  background-color: rgba(245, 158, 11, 0.08);
  border-color: var(--border-status-warning);
  color: var(--status-warning);
}

.badge--danger {
  background-color: rgba(244, 63, 94, 0.08);
  border-color: var(--border-status-danger);
  color: var(--status-danger);
}

/* ==========================================================================
   3. Section Label Primitive
   Technological section marker avoiding generic AI eyebrow clichés
   ========================================================================== */

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-accent);
  padding: var(--space-1) 0;
}

.section-label__index {
  color: var(--text-secondary);
  font-size: 0.9em;
}

.section-label__sep {
  color: var(--border-strong);
}

/* ==========================================================================
   4. Card & Surface Primitives
   Architectural depth with subtle gradient lighting & hairline borders
   ========================================================================== */

.surface-card {
  position: relative;
  background-color: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  background-image: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.03) 0%,
    transparent 100%
  );
  overflow: hidden;
}

.surface-elevated {
  background-color: var(--surface-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
}

.surface-interactive {
  transition:
    border-color var(--transition-normal),
    transform var(--transition-normal),
    box-shadow var(--transition-normal);
}

.surface-interactive:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-md), var(--glow-primary);
  transform: translateY(-2px);
}

/* Subtle corner accent indicator (optional architectural detail) */
.surface-card--accented::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent-400), transparent);
}

/* ==========================================================================
   5. Icon Container Primitive
   Precision geometric vessel for scalable SVGs
   ========================================================================== */

.icon-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--surface-interactive);
  border: 1px solid var(--border-default);
  color: var(--color-accent-400);
  flex-shrink: 0;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast);
}

.icon-box svg {
  width: 22px;
  height: 22px;
  stroke-width: 1.8;
}

.icon-box--lg {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-lg);
}

.icon-box--lg svg {
  width: 26px;
  height: 26px;
}

.icon-box--secure {
  background-color: rgba(16, 185, 129, 0.08);
  border-color: var(--border-status-secure);
  color: var(--status-secure);
}

.icon-box--accent {
  background-color: var(--surface-accent-subtle);
  border-color: var(--border-accent);
  color: var(--color-accent-300);
}

/* ==========================================================================
   6. Background / Grid Primitive
   Architectural technical matrix with restrained opacity
   ========================================================================== */

.bg-grid-mesh {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-background);
  background-size: 48px 48px;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  mask-image: radial-gradient(ellipse 80% 50% at 50% 0%, #000 70%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 50% at 50% 0%, #000 70%, transparent 100%);
}

.bg-dots-matrix {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-background);
  background-size: 24px 24px;
  background-image: radial-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  mask-image: radial-gradient(circle at 50% 30%, #000 50%, transparent 90%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 50%, transparent 90%);
}

/* ==========================================================================
   7. Controlled Glow Primitive
   Non-blinding ambient lighting framing content with high precision
   ========================================================================== */

.glow-emitter {
  position: absolute;
  width: min(650px, 100vw);
  max-width: 100%;
  height: 400px;
  border-radius: 50%;
  pointer-events: none;
  z-index: var(--z-background);
  filter: blur(100px);
  opacity: 0.45;
  background: radial-gradient(
    ellipse at center,
    rgba(59, 102, 255, 0.35) 0%,
    rgba(6, 182, 212, 0.15) 45%,
    transparent 70%
  );
}

.glow-emitter--top-center {
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
}

.glow-emitter--subtle {
  opacity: 0.25;
  filter: blur(120px);
}

/* ==========================================================================
   8. Accessibility Utilities
   ========================================================================== */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}