/* ====================================================
   INTERACTIONS.CSS – Premium Micro-Interactions Layer
   Devanshu Shah Portfolio
   All rules are purely additive — no existing layout,
   fonts, grid, spacing, or components are changed.
   ==================================================== */


/* ====================================================
   1. PAGE LOADING SCREEN — Product Thinking Engine
   ==================================================== */

#loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  /* Grid is embedded in the loader itself so it's always visible */
  background-color: var(--bg-primary);
  background-image: var(--grid-bg);
  background-size: var(--grid-size) var(--grid-size);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  pointer-events: all;
  transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

#loader.loader--done {
  display: none;
}

/* ── Central content block ─────────────────────── */
.loader__content {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100vw;
  height: 100vh;
}

/* ── Circular Progress Loader ──────────────────── */
.loader__ring-wrapper {
  position: relative;
  width: 140px;
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  background: var(--bg-primary); /* Slight mask to hide background noise inside the circle if needed, or leave transparent */
  border-radius: 50%;
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .loader__ring-wrapper {
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
}

.loader__ring-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg); /* Start animation from the top */
}

.loader__ring-bg {
  fill: none;
  stroke: var(--border);
  stroke-width: 2px;
}

.loader__ring-fill {
  fill: none;
  stroke: var(--accent);
  stroke-width: 3.5px;
  stroke-linecap: round;
  /* 2 * Math.PI * 46 = 289.026 */
  stroke-dasharray: 289.026;
  stroke-dashoffset: 289.026; /* Starts fully hidden */
  filter: drop-shadow(0 0 6px rgba(108, 92, 231, 0.4));
  transition: stroke-dashoffset 0.1s ease-out; /* Smooth JS updates */
}

[data-theme="dark"] .loader__ring-fill {
  filter: drop-shadow(0 0 8px rgba(138, 124, 255, 0.5));
}

.loader__percentage {
  font-family: var(--font-headings);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: center;
  line-height: 1.3;
  letter-spacing: 0.02em;
}

/* ── Floating product lifecycle chips ──────────── */
.loader__chips-zone {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 1px;
  height: 1px;
  z-index: 1; /* Behind the ring */
}

.loader__chip {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-family: var(--font-headings);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  white-space: nowrap;
  box-shadow: var(--shadow-card);
  will-change: transform, opacity;
}

/* Body locked during load */
body.loading {
  overflow: hidden;
}


/* ====================================================
   2. PAGE TRANSITION — fade-in on load
   ==================================================== */

body {
  animation: pageFadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1) both;
}

/* Suppress on index — loader handles the reveal */
body.has-loader {
  animation: none;
}

@keyframes pageFadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Exit state — added by JS before navigation */
body.page-exit {
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 0.32s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Fade-in for inner pages (case-study, prd, etc.) */
body.page-fade-in {
  animation: pageFadeIn 0.42s cubic-bezier(0.22, 1, 0.36, 1) both;
}


/* ====================================================
   3. ENHANCED CARD HOVER — lift + glow
   Override the more aggressive existing values with
   a minimal, premium feel.
   ==================================================== */

.case-card {
  position: relative;
  transition: transform 0.22s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.22s cubic-bezier(0.22, 1, 0.36, 1),
              border-color 0.22s ease,
              background-color 0.3s ease !important;
}

.case-card:hover {
  transform: translateY(-4px) !important;
  box-shadow: 0 16px 40px -8px rgba(108, 92, 231, 0.18),
              0 4px 12px -4px rgba(108, 92, 231, 0.10) !important;
  border-color: rgba(108, 92, 231, 0.35) !important;
}

[data-theme="dark"] .case-card:hover {
  box-shadow: 0 16px 40px -8px rgba(138, 124, 255, 0.2),
              0 4px 12px -4px rgba(138, 124, 255, 0.12) !important;
  border-color: rgba(138, 124, 255, 0.35) !important;
}

/* Tear-down cards (no visual block) */
.teardown-card:hover {
  transform: translateY(-4px) !important;
}

/* PRD card */
.prd-card {
  transition: transform 0.22s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.22s cubic-bezier(0.22, 1, 0.36, 1),
              border-color 0.22s ease !important;
}

.prd-card:hover {
  transform: translateY(-4px) scale(1.005) !important;
  border-color: rgba(108, 92, 231, 0.35) !important;
  box-shadow: 0 14px 32px -6px rgba(108, 92, 231, 0.14),
              0 4px 10px -4px rgba(108, 92, 231, 0.08) !important;
}

[data-theme="dark"] .prd-card:hover {
  box-shadow: 0 14px 32px -6px rgba(138, 124, 255, 0.18),
              0 4px 10px -4px rgba(138, 124, 255, 0.10) !important;
}

/* Impact cards */
.impact-card {
  transition: transform 0.22s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.22s cubic-bezier(0.22, 1, 0.36, 1),
              border-color 0.22s ease;
}

.impact-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px -6px rgba(108, 92, 231, 0.14);
  border-color: rgba(108, 92, 231, 0.3);
}

[data-theme="dark"] .impact-card:hover {
  box-shadow: 0 10px 24px -6px rgba(138, 124, 255, 0.18);
}


/* ====================================================
   5. NAV GROUPED DROPDOWN
   ==================================================== */

.nav__group {
  position: relative;
}

/* Chevron indicator */
.nav__group-btn {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.4rem 0.65rem;
  border-radius: 8px;
  cursor: pointer;
  background: none;
  border: none;
  transition: all var(--transition);
  white-space: nowrap;
  min-height: 36px;
  position: relative;
}

.nav__group-btn::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 8px;
  right: 8px;
  height: 1.5px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s cubic-bezier(0.22, 1, 0.36, 1);
}

.nav__group:hover .nav__group-btn::after,
.nav__group.open .nav__group-btn::after {
  transform: scaleX(1);
}

.nav__group-btn:hover,
.nav__group.open .nav__group-btn {
  color: var(--text-primary);
  background: rgba(0,0,0,0.04);
}

[data-theme="dark"] .nav__group-btn:hover,
[data-theme="dark"] .nav__group.open .nav__group-btn {
  background: rgba(255,255,255,0.06);
}

.nav__chevron {
  width: 10px;
  height: 10px;
  stroke: currentColor;
  stroke-width: 2.5;
  fill: none;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.nav__group.open .nav__chevron {
  transform: rotate(180deg);
}

/* Dropdown panel */
.nav__dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 180px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.375rem;
  box-shadow: 0 8px 32px -4px rgba(0,0,0,0.12), 0 2px 8px rgba(0,0,0,0.06);
  display: none;
  opacity: 0;
  z-index: 500;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

[data-theme="dark"] .nav__dropdown {
  box-shadow: 0 8px 32px -4px rgba(0,0,0,0.4), 0 2px 8px rgba(0,0,0,0.3);
}

.nav__dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.875rem;
  border-radius: 7px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}

.nav__dropdown-item:hover {
  color: var(--accent);
  background: var(--accent-soft);
}

.nav__dropdown-item__dot {
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
  opacity: 0.5;
}

/* Mobile: drawer grouped items */
.nav__drawer-group {
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
  margin-bottom: 0.5rem;
}

.nav__drawer-group-label {
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0.75rem 1.5rem 0.25rem;
}

/* ====================================================
   4. NAV LINK ANIMATED UNDERLINE
   ==================================================== */

.nav__links a {
  position: relative;
  overflow: hidden;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 8px;
  right: 8px;
  height: 1.5px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s cubic-bezier(0.22, 1, 0.36, 1);
}

.nav__links a:hover::after,
.nav__links a.active::after {
  transform: scaleX(1);
}


/* ====================================================
   5. BUTTON MICRO-INTERACTIONS
   ==================================================== */

.btn--primary {
  transition: transform 0.2s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.2s cubic-bezier(0.22, 1, 0.36, 1),
              background 0.2s ease,
              border-color 0.2s ease !important;
}

.btn--primary:hover {
  transform: translateY(-1px) scale(1.02) !important;
  box-shadow: 0 6px 24px rgba(108, 92, 231, 0.32),
              0 0 0 3px rgba(108, 92, 231, 0.12) !important;
}

.btn--secondary {
  transition: transform 0.2s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.2s cubic-bezier(0.22, 1, 0.36, 1),
              background 0.2s ease,
              border-color 0.2s ease !important;
}

.btn--secondary:hover {
  transform: translateY(-1px) scale(1.02) !important;
  box-shadow: 0 4px 18px rgba(108, 92, 231, 0.18),
              0 0 0 3px rgba(108, 92, 231, 0.08) !important;
}

[data-theme="dark"] .btn--primary:hover {
  box-shadow: 0 6px 24px rgba(138, 124, 255, 0.35),
              0 0 0 3px rgba(138, 124, 255, 0.15) !important;
}

[data-theme="dark"] .btn--secondary:hover {
  box-shadow: 0 4px 18px rgba(138, 124, 255, 0.2),
              0 0 0 3px rgba(138, 124, 255, 0.1) !important;
}

.btn:active {
  transform: translateY(0) scale(0.98) !important;
  transition-duration: 0.08s !important;
}


/* ====================================================
   6. ICON MICRO-HOVER
   ==================================================== */

.case-card__visual svg,
.prd-card__visual svg,
.impact-card__icon svg,
.exp-card__visual svg {
  transition: transform 0.18s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
}

.case-card:hover .case-card__visual svg,
.exp-card:hover .exp-card__visual svg {
  transform: rotate(5deg) scale(1.08);
}

.prd-card:hover .prd-card__visual svg {
  transform: rotate(-4deg) scale(1.1);
}

.impact-card:hover .impact-card__icon svg {
  transform: scale(1.15) rotate(3deg);
}

/* Arrow icons in CTA links animate on card hover */
.card-cta svg {
  transition: transform 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}

.case-card:hover .card-cta svg,
.prd-card:hover .card-cta svg {
  transform: translateX(4px);
}


/* ====================================================
   7. CASE STUDY PREVIEW PANEL
   ==================================================== */

.case-card {
  /* Needed for absolute positioning of preview panel */
  overflow: visible !important;
}

/* wrap inner content for parallax without breaking overflow:hidden on card border */
.case-card__inner-wrap {
  display: contents;
}

.cs-preview {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--bg-card);
  border: 1px solid rgba(108, 92, 231, 0.25);
  border-radius: 10px;
  padding: 0.875rem 1.125rem;
  box-shadow: 0 8px 32px -4px rgba(108, 92, 231, 0.15),
              0 2px 8px rgba(0,0,0,0.06);
  z-index: 10;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.28s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
  pointer-events: none;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

[data-theme="dark"] .cs-preview {
  border-color: rgba(138, 124, 255, 0.25);
  box-shadow: 0 8px 32px -4px rgba(138, 124, 255, 0.18),
              0 2px 8px rgba(0,0,0,0.3);
}

.cs-preview--visible {
  opacity: 1;
  transform: translateY(0);
}

.cs-preview__metric {
  font-family: var(--font-headings);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 0.2rem;
}

.cs-preview__summary {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  line-height: 1.4;
}

.cs-preview__tag {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.15rem 0.45rem;
  border-radius: 99px;
  margin-bottom: 0.5rem;
}

/* Divider dot between metric and summary */
.cs-preview__row {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}


/* ====================================================
   8. CURSOR PARALLAX CARD FEEDBACK (desktop)
   ==================================================== */

/* The card content wrapper moves slightly on cursor */
.case-card__parallax-inner {
  transition: transform 0.15s linear;
  will-change: transform;
}


/* ====================================================
   9. SCROLL REVEAL — Additional finesse
   ==================================================== */

/* Section headers stagger */
.section-header .section-title,
.work__header .section-title {
  transition-delay: 0s;
}

.section-header .section-subtitle,
.work__header .section-subtitle {
  transition-delay: 0.06s;
}

/* Smooth will-change cleanup after animation */
.reveal.in-view,
.reveal-stagger.in-view > * {
  will-change: auto;
}


/* ====================================================
   10. MOBILE — Disable hover-only effects
   ==================================================== */

@media (hover: none), (pointer: coarse) {
  .cs-preview { display: none !important; }

  .nav__links a::after { display: none; }

  .case-card:hover,
  .prd-card:hover,
  .teardown-card:hover,
  .impact-card:hover {
    transform: none !important;
    box-shadow: var(--shadow-card) !important;
    border-color: var(--border) !important;
  }

  .btn--primary:hover,
  .btn--secondary:hover {
    transform: none !important;
    box-shadow: none !important;
  }

  .case-card:hover .case-card__visual svg,
  .prd-card:hover .prd-card__visual svg,
  .impact-card:hover .impact-card__icon svg,
  .exp-card:hover .exp-card__visual svg {
    transform: none !important;
  }
}


/* ====================================================
   11. REDUCED MOTION RESPECT
   ==================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  #loader { display: none !important; }
  body.loading { overflow: auto; }
}