/* 
   ZOOM TRANSITIONS CSS
   Card-to-page zoom animation styles
   Mobile-first, performance optimized
*/

/* ══════════════════════════════════════════════════════════════════════════
   ZOOM TRANSITION BACKDROP
   ══════════════════════════════════════════════════════════════════════════ */

.zoom-transition-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 11, 0);
  backdrop-filter: blur(0);
  -webkit-backdrop-filter: blur(0);
  z-index: 9999;
  pointer-events: none;
  transition: 
    background var(--focus-duration-open, 400ms) var(--focus-easing-open, cubic-bezier(0.32, 0.72, 0, 1)),
    backdrop-filter var(--focus-duration-open, 400ms) var(--focus-easing-open, cubic-bezier(0.32, 0.72, 0, 1));
  will-change: background, backdrop-filter;
}

.zoom-transition-backdrop--active {
  background: rgba(10, 10, 11, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  pointer-events: auto;
}

/* ══════════════════════════════════════════════════════════════════════════
   ZOOM TRANSITION CLONE
   The animated card element
   ══════════════════════════════════════════════════════════════════════════ */

.zoom-transition-clone {
  position: fixed;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  z-index: 10000;
  will-change: transform, border-radius;
}

.zoom-transition-clone .focus-card__preview {
  display: block;
}

.zoom-transition-clone .focus-card__body {
  padding: var(--space-6);
}

.zoom-transition-clone .focus-card__arrow {
  display: none;
}

/* ══════════════════════════════════════════════════════════════════════════
   FOCUS OVERLAY ENHANCEMENTS
   Smooth transition states
   ══════════════════════════════════════════════════════════════════════════ */

.focus-overlay-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 11, 0);
  backdrop-filter: blur(0);
  -webkit-backdrop-filter: blur(0);
  z-index: var(--z-overlay, 500);
  opacity: 0;
  visibility: hidden;
  transition: 
    opacity var(--focus-duration-open, 400ms) var(--focus-easing-open, cubic-bezier(0.32, 0.72, 0, 1)),
    visibility 0ms var(--focus-duration-open, 400ms),
    backdrop-filter var(--focus-duration-open, 400ms) var(--focus-easing-open, cubic-bezier(0.32, 0.72, 0, 1));
}

.focus-overlay-backdrop--active {
  opacity: 1;
  visibility: visible;
  background: rgba(10, 10, 11, var(--focus-backdrop-opacity, 0.85));
  backdrop-filter: blur(var(--focus-backdrop-blur, 20px));
  -webkit-backdrop-filter: blur(var(--focus-backdrop-blur, 20px));
  transition: 
    opacity var(--focus-duration-open, 400ms) var(--focus-easing-open, cubic-bezier(0.32, 0.72, 0, 1)),
    visibility 0ms 0ms,
    backdrop-filter var(--focus-duration-open, 400ms) var(--focus-easing-open, cubic-bezier(0.32, 0.72, 0, 1));
}

.focus-overlay {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-overlay, 500) + 1);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: 
    opacity var(--focus-duration-open, 400ms) var(--focus-easing-open, cubic-bezier(0.32, 0.72, 0, 1)),
    visibility 0ms var(--focus-duration-open, 400ms);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.focus-overlay--active {
  opacity: 1;
  visibility: visible;
  transition: 
    opacity var(--focus-duration-open, 400ms) var(--focus-easing-open, cubic-bezier(0.32, 0.72, 0, 1)),
    visibility 0ms 0ms;
}

.focus-overlay__panel {
  position: relative;
  width: 100%;
  max-width: 900px;
  max-height: calc(100vh - var(--space-8));
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transform: translateY(20px) scale(0.98);
  transition: transform var(--focus-duration-open, 400ms) var(--focus-easing-open, cubic-bezier(0.32, 0.72, 0, 1));
  will-change: transform;
}

.focus-overlay--active .focus-overlay__panel {
  transform: translateY(0) scale(1);
}

.focus-overlay__close {
  position: sticky;
  top: var(--space-4);
  right: var(--space-4);
  float: right;
  margin: var(--space-4);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 10;
  transition: all var(--duration-fast) var(--ease-out);
}

.focus-overlay__close:hover,
.focus-overlay__close:focus {
  background: var(--accent-primary);
  color: var(--text-primary);
  border-color: var(--accent-primary);
  transform: scale(1.05);
}

.focus-overlay__close:active {
  transform: scale(0.95);
}

.focus-overlay__content {
  padding: var(--space-6);
  padding-top: 0;
}

/* ══════════════════════════════════════════════════════════════════════════
   OVERLAY LOADING STATE
   Loading spinner for dynamically fetched content
   ══════════════════════════════════════════════════════════════════════════ */

.focus-overlay__loading {
  min-height: 400px;
  display: flex;
  flex-direction: column;
}

.focus-overlay__loader {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-12);
}

.focus-overlay__loader-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-secondary);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: focus-overlay-spin 0.8s linear infinite;
}

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

/* External content container */
.focus-overlay__external-content {
  animation: focus-overlay-fade-in 0.3s ease-out;
}

.focus-overlay__external-content .container {
  max-width: 100%;
  padding: 0;
}

.focus-overlay__external-content .case-study-hero {
  padding: var(--space-4) 0 var(--space-6);
  text-align: left;
}

.focus-overlay__external-content .case-study-hero__badge {
  margin-bottom: var(--space-3);
}

.focus-overlay__external-content .case-study-hero__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
}

.focus-overlay__external-content .case-study-hero__subtitle {
  margin: 0 0 var(--space-4);
  max-width: none;
}

.focus-overlay__external-content .case-study-content {
  padding: var(--space-4) 0;
}

.focus-overlay__external-content .case-study-section {
  margin-bottom: var(--space-6);
}

.focus-overlay__external-content .cta-section {
  padding: var(--space-6) 0;
}

.focus-overlay__external-content footer {
  display: none;
}

@keyframes focus-overlay-fade-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .focus-overlay__loader-spinner {
    animation: none;
    border-top-color: var(--accent-primary);
    opacity: 0.7;
  }
  
  .focus-overlay__external-content {
    animation: none;
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   FOCUS CARD HOVER ENHANCEMENTS
   Premium hover effects
   ══════════════════════════════════════════════════════════════════════════ */

.focus-card {
  cursor: pointer;
  transition: 
    transform var(--focus-duration-hover, 250ms) var(--focus-easing-hover, cubic-bezier(0.25, 0.46, 0.45, 0.94)),
    box-shadow var(--focus-duration-hover, 250ms) var(--focus-easing-hover, cubic-bezier(0.25, 0.46, 0.45, 0.94)),
    border-color var(--focus-duration-hover, 250ms) var(--focus-easing-hover, cubic-bezier(0.25, 0.46, 0.45, 0.94));
  will-change: transform;
}

.focus-card:hover {
  transform: translateY(var(--focus-card-lift, -8px)) scale(var(--focus-card-scale-hover, 1.02));
  box-shadow: 
    var(--shadow-lg),
    var(--focus-glow-spread, 0 0 40px rgba(59, 130, 246, 0.12));
  border-color: var(--accent-primary);
}

.focus-card:active {
  transform: translateY(-4px) scale(1);
  transition-duration: 100ms;
}

/* ══════════════════════════════════════════════════════════════════════════
   BODY STATE
   ══════════════════════════════════════════════════════════════════════════ */

body.focus-overlay-open {
  overflow: hidden;
  position: fixed;
  width: 100%;
  height: 100%;
}

/* ══════════════════════════════════════════════════════════════════════════
   MOBILE OPTIMIZATIONS
   ══════════════════════════════════════════════════════════════════════════ */

@media (max-width: 768px) {
  .focus-overlay {
    padding: 0;
  }

  .focus-overlay__panel {
    max-height: 100vh;
    height: 100%;
    border-radius: 0;
    border: none;
    transform: translateY(100%);
  }

  .focus-overlay--active .focus-overlay__panel {
    transform: translateY(0);
  }

  .focus-overlay__close {
    position: fixed;
    top: env(safe-area-inset-top, var(--space-4));
    right: var(--space-4);
    margin: 0;
    background: var(--bg-secondary);
    box-shadow: var(--shadow-md);
  }

  .focus-overlay__content {
    padding: var(--space-4);
    padding-top: calc(44px + var(--space-8));
    padding-bottom: env(safe-area-inset-bottom, var(--space-8));
  }

  /* Reduce animation on mobile */
  .focus-card:hover {
    transform: none;
  }

  .focus-card:active {
    transform: scale(0.98);
  }

  /* Hide zoom transitions on mobile */
  .zoom-transition-clone,
  .zoom-transition-backdrop {
    display: none !important;
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   REDUCED MOTION
   ══════════════════════════════════════════════════════════════════════════ */

@media (prefers-reduced-motion: reduce) {
  .focus-overlay-backdrop,
  .focus-overlay,
  .focus-overlay__panel,
  .focus-card,
  .zoom-transition-clone,
  .zoom-transition-backdrop {
    transition: none !important;
    animation: none !important;
  }

  .focus-overlay--active .focus-overlay__panel {
    transform: none;
  }

  .focus-card:hover {
    transform: none;
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   OVERLAY CONTENT SECTIONS
   ══════════════════════════════════════════════════════════════════════════ */

.focus-overlay__header {
  margin-bottom: var(--space-8);
}

.focus-overlay__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.focus-overlay__meta-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.focus-overlay__meta-label {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.focus-overlay__meta-value {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

.focus-overlay__title {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  line-height: var(--leading-tight);
}

.focus-overlay__summary {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.focus-overlay__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.focus-overlay__section {
  margin-bottom: var(--space-8);
}

.focus-overlay__section-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.focus-overlay__section-title::before {
  content: '';
  width: 4px;
  height: 1.25rem;
  background: linear-gradient(180deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 2px;
}

.focus-overlay__section-content {
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

.focus-overlay__section-content p {
  margin-bottom: var(--space-4);
}

.focus-overlay__section-content ul {
  list-style: none;
  padding-left: 0;
}

.focus-overlay__section-content li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-2);
}

.focus-overlay__section-content li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  background: var(--accent-primary);
  border-radius: 50%;
}

.focus-overlay__tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-primary);
}

.tech-stack__item {
  display: inline-flex;
  padding: var(--space-2) var(--space-3);
  background: var(--accent-subtle);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--accent-secondary);
}

/* ══════════════════════════════════════════════════════════════════════════
   ARCHITECTURE DIAGRAM
   ══════════════════════════════════════════════════════════════════════════ */

.architecture-diagram {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin: var(--space-4) 0;
  overflow-x: auto;
}

.architecture-diagram__title {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
}

.architecture-diagram__content {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--accent-secondary);
  white-space: pre;
  line-height: 1.5;
}

/* ══════════════════════════════════════════════════════════════════════════
   TRADEOFF TABLE
   ══════════════════════════════════════════════════════════════════════════ */

.tradeoff-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-4) 0;
  font-size: var(--text-sm);
}

.tradeoff-table th,
.tradeoff-table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--border-primary);
}

.tradeoff-table th {
  font-weight: 600;
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.tradeoff-table td {
  color: var(--text-secondary);
}

.tradeoff-table tr:hover td {
  background: var(--bg-tertiary);
}

@media (max-width: 768px) {
  .tradeoff-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .architecture-diagram__content {
    font-size: var(--text-xs);
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   PAGE ZOOM TRANSITION SYSTEM
   Card-to-page navigation with smooth zoom animation
   ══════════════════════════════════════════════════════════════════════════ */

.page-zoom-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 11, 0);
  backdrop-filter: blur(0);
  -webkit-backdrop-filter: blur(0);
  z-index: 10000;
  pointer-events: none;
  transition: 
    background 450ms cubic-bezier(0.32, 0.72, 0, 1),
    backdrop-filter 450ms cubic-bezier(0.32, 0.72, 0, 1);
  will-change: background, backdrop-filter;
}

.page-zoom-backdrop--active {
  background: rgba(10, 10, 11, 0.95);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  pointer-events: auto;
}

.page-zoom-clone {
  position: fixed;
  background: var(--bg-secondary, #111113);
  border: 1px solid var(--border-primary, rgba(255, 255, 255, 0.06));
  overflow: hidden;
  z-index: 10001;
  will-change: transform, border-radius, opacity;
  box-shadow: 
    0 25px 50px -12px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.05);
}

.page-zoom-clone .focus-card__preview {
  display: block;
  height: 40%;
  overflow: hidden;
}

.page-zoom-clone .focus-card__body {
  padding: var(--space-4, 1rem);
}

.page-zoom-clone .focus-card__arrow,
.page-zoom-clone .focus-card__actions {
  display: none;
}

.page-zoom-reverse-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-primary, #0a0a0b);
  z-index: 10001;
  will-change: transform, opacity, border-radius;
}

/* ══════════════════════════════════════════════════════════════════════════
   PROJECT PAGE BACK BUTTON
   Consistent close/back navigation
   ══════════════════════════════════════════════════════════════════════════ */

.page-back-btn {
  position: fixed;
  top: var(--space-4, 1rem);
  left: var(--space-4, 1rem);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: var(--space-2, 0.5rem);
  padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
  background: var(--bg-glass, rgba(17, 17, 19, 0.8));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-secondary, rgba(255, 255, 255, 0.1));
  border-radius: var(--radius-full, 9999px);
  color: var(--text-secondary, #a1a1aa);
  font-size: var(--text-sm, 0.875rem);
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: all 200ms ease;
  min-height: 44px;
  min-width: 44px;
}

.page-back-btn:hover,
.page-back-btn:focus {
  background: var(--bg-glass-hover, rgba(31, 31, 35, 0.9));
  color: var(--text-primary, #fafafa);
  border-color: var(--border-hover, rgba(255, 255, 255, 0.15));
  transform: translateX(-2px);
}

.page-back-btn:active {
  transform: scale(0.98);
}

.page-back-btn__icon {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

.page-back-btn__text {
  display: inline;
}

/* ══════════════════════════════════════════════════════════════════════════
   SWIPE INDICATOR
   Visual feedback for mobile swipe-to-close
   ══════════════════════════════════════════════════════════════════════════ */

.swipe-indicator {
  position: fixed;
  top: var(--space-4, 1rem);
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 5px;
  background: var(--border-secondary, rgba(255, 255, 255, 0.1));
  border-radius: var(--radius-full, 9999px);
  z-index: 101;
  opacity: 0;
  transition: opacity 200ms ease;
}

.swipe-indicator--visible {
  opacity: 1;
}

/* ══════════════════════════════════════════════════════════════════════════
   MOBILE PAGE ZOOM OPTIMIZATIONS
   ══════════════════════════════════════════════════════════════════════════ */

@media (max-width: 768px) {
  .page-zoom-backdrop {
    transition-duration: 350ms;
  }

  .page-zoom-clone {
    transition-duration: 350ms;
  }

  .page-back-btn {
    top: auto;
    bottom: calc(env(safe-area-inset-bottom, 0px) + var(--space-4, 1rem));
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-3, 0.75rem) var(--space-6, 1.5rem);
    box-shadow: var(--shadow-lg, 0 10px 15px rgba(0, 0, 0, 0.3));
  }

  .page-back-btn:hover {
    transform: translateX(-50%);
  }

  .page-back-btn__text {
    display: none;
  }

  .swipe-indicator {
    display: block;
    opacity: 0.5;
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   REDUCED MOTION FOR PAGE ZOOM
   ══════════════════════════════════════════════════════════════════════════ */

@media (prefers-reduced-motion: reduce) {
  .page-zoom-backdrop,
  .page-zoom-clone,
  .page-zoom-reverse-overlay,
  .page-back-btn {
    transition: none !important;
    animation: none !important;
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   SAFE AREA SUPPORT
   For devices with notches and rounded corners
   ══════════════════════════════════════════════════════════════════════════ */

@supports (padding: env(safe-area-inset-top)) {
  .page-back-btn {
    top: calc(env(safe-area-inset-top) + var(--space-4, 1rem));
    left: calc(env(safe-area-inset-left) + var(--space-4, 1rem));
  }

  @media (max-width: 768px) {
    .page-back-btn {
      top: auto;
      left: 50%;
      bottom: calc(env(safe-area-inset-bottom) + var(--space-4, 1rem));
    }
  }
}