/* ============================================================================
   abcGEO — UI layer
   Glassmorphism, micro-interactions and engagement widgets.

   Layers on top of css/styles.css. Every token below falls back to a literal,
   so this file can also be dropped onto the Tailwind-only blog posts that do
   not load the shared design system.
   Load order: styles.css → instastack-tool.css → ui.css
   ========================================================================== */

:root {
  --ui-coral:      var(--color-coral, #FF6B4A);
  --ui-amber:      var(--color-amber, #FF8C00);
  --ui-teal:       var(--color-teal, #00C9A7);
  --ui-cyan:       var(--color-cyan, #00B4D8);
  --ui-warm-ink:   var(--color-warm-ink, #8F2F10);
  --ui-teal-ink:   var(--color-teal-ink, #00564C);
  --ui-cyan-ink:   var(--color-cyan-ink, #0A5A72);
  --ui-ink:        var(--color-ink, #1A202C);
  --ui-ink-muted:  var(--color-ink-muted, #455063);
  --ui-ink-on-fill:var(--color-ink-cta, #141A23);
  --ui-cream:      var(--color-cream, #FAF9F6);
  --ui-cream-alt:  var(--color-cream-alt, #F4F7F6);
  --ui-white:      var(--color-white, #FFFFFF);
  --ui-border:     var(--color-border, rgba(26, 32, 44, 0.12));
  --ui-font-display: var(--font-display, 'Syne', sans-serif);
  --ui-font-mono:    var(--font-mono, 'JetBrains Mono', monospace);
  --ui-ease:       var(--ease-energetic, cubic-bezier(0.34, 1.56, 0.64, 1));

  /* Frosted glass: kept at high opacity so text on top stays AAA-legible */
  --ui-glass:        rgba(255, 255, 255, 0.74);
  --ui-glass-strong: rgba(255, 255, 255, 0.86);
  --ui-glass-blur:   saturate(180%) blur(16px);
  --ui-glass-edge:   inset 0 1px 0 rgba(255, 255, 255, 0.85);

  /* Multi-layered ambient glow — warm coral + cool teal, cast softly */
  --ui-ambient: 0 1px 2px rgba(26, 32, 44, 0.04),
                0 8px 20px -12px rgba(255, 107, 74, 0.16),
                0 6px 18px -14px rgba(0, 201, 167, 0.18);
  --ui-ambient-hover: 0 2px 6px rgba(26, 32, 44, 0.05),
                      0 22px 44px -18px rgba(255, 107, 74, 0.30),
                      0 18px 40px -22px rgba(0, 201, 167, 0.32),
                      0 0 0 1px rgba(0, 201, 167, 0.22);
  --ui-ambient-warm:  0 2px 6px rgba(26, 32, 44, 0.05),
                      0 24px 48px -18px rgba(255, 140, 0, 0.34),
                      0 16px 36px -22px rgba(255, 107, 74, 0.30);
}

/* Anchors clear the sticky header when smooth-scrolled to */
html { scroll-behavior: smooth; }
:target,
[id] { scroll-margin-top: 5.5rem; }

/* ============================================================================
   1. Glassmorphism & depth
   ========================================================================== */

.glass,
.site-header {
  background: var(--ui-glass);
  -webkit-backdrop-filter: var(--ui-glass-blur);
  backdrop-filter: var(--ui-glass-blur);
}

.site-header {
  box-shadow: var(--ui-glass-edge), 0 1px 0 var(--ui-border);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

/* Header firms up once the page scrolls under it */
.site-header.is-scrolled {
  background: var(--ui-glass-strong);
  box-shadow: var(--ui-glass-edge), 0 10px 30px -18px rgba(255, 107, 74, 0.30),
              0 6px 20px -14px rgba(0, 201, 167, 0.26);
}

/* Frosted surfaces for cards and tool containers */
.formula-panel,
.tool-item,
.blog-item,
.eq-part,
#instastack-app .panel,
#instastack-app .env-panel,
#instastack-app .output-section,
#instastack-app .arch-section {
  background: var(--ui-glass-strong);
  -webkit-backdrop-filter: var(--ui-glass-blur);
  backdrop-filter: var(--ui-glass-blur);
  box-shadow: var(--ui-glass-edge), var(--ui-ambient);
}

/* ============================================================================
   2. Micro-interactions
   ========================================================================== */

.tool-item,
.blog-item,
.eq-part,
#instastack-app .panel {
  transition: transform 0.3s var(--ui-ease), box-shadow 0.3s ease,
              border-color 0.3s ease, background 0.3s ease;
  will-change: transform;
}

.tool-item:hover,
.blog-item:hover,
.eq-part:hover {
  transform: translateY(-4px) scale(1.02);
  border-color: rgba(0, 201, 167, 0.45);
  box-shadow: var(--ui-glass-edge), var(--ui-ambient-hover);
}

/* Tool panels lift without scaling — they hold live checkboxes and inputs,
   so scaling mid-interaction would soften the text under the cursor. */
#instastack-app .panel:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 201, 167, 0.45);
  box-shadow: var(--ui-glass-edge), var(--ui-ambient-hover);
}

/* Buttons: soft lift + scale + accent glow */
.btn,
.nav-links a.btn {
  transition: transform 0.24s var(--ui-ease), background 0.24s ease,
              border-color 0.24s ease, box-shadow 0.24s ease, color 0.24s ease;
}

.btn:hover,
.nav-links a.btn:hover {
  transform: translateY(-2px) scale(1.02);
}

.btn:active,
.nav-links a.btn:active {
  transform: translateY(0) scale(0.99);
}

.btn-primary:hover,
.nav-links a.btn-primary:hover {
  box-shadow: var(--ui-ambient-warm);
}

.btn-secondary:hover,
.btn-ghost:hover {
  box-shadow: var(--ui-ambient-hover);
}

/* Shimmer sweep across the primary CTA */
.btn-primary {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(115deg, transparent 20%, rgba(255, 255, 255, 0.55) 50%, transparent 80%);
  transform: translateX(-120%);
  transition: transform 0.7s ease;
}

.btn-primary:hover::after {
  transform: translateX(120%);
}

/* ============================================================================
   3. Entry animations (fade-in / slide-up on scroll)
   `.reveal` toggling is handled by js/main.js; js/ui.js adds the stagger.
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s ease, transform 0.65s var(--ui-ease);
}

.reveal-left  { transform: translateX(-22px); }
.reveal-right { transform: translateX(22px); }
.reveal-scale { transform: scale(0.96); }

.reveal.visible,
.reveal-left.visible,
.reveal-right.visible,
.reveal-scale.visible {
  opacity: 1;
  transform: none;
}

/* ============================================================================
   4. Gradient heading accents (text clipping)
   Stops are all AAA-dark, so clipped text stays legible on cream and white.
   ========================================================================== */

.text-gradient {
  background: linear-gradient(100deg, var(--ui-ink) 0%, var(--ui-warm-ink) 48%, var(--ui-teal-ink) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  /* Keeps descenders from being clipped by the background box */
  padding-bottom: 0.08em;
}

.text-gradient-warm {
  background: linear-gradient(100deg, var(--ui-warm-ink) 0%, #9A3412 55%, var(--ui-ink) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  padding-bottom: 0.08em;
}

/* ============================================================================
   5. Live search / quick filter bar
   ========================================================================== */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin: 1.75rem 0 0.5rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--ui-border);
  border-radius: 999px;
  background: var(--ui-glass-strong);
  -webkit-backdrop-filter: var(--ui-glass-blur);
  backdrop-filter: var(--ui-glass-blur);
  box-shadow: var(--ui-glass-edge), var(--ui-ambient);
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.filter-bar:focus-within {
  border-color: rgba(0, 201, 167, 0.5);
  box-shadow: var(--ui-glass-edge), var(--ui-ambient-hover);
}

.filter-search {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex: 1 1 15rem;
  min-width: 0;
  padding-left: 0.65rem;
}

.filter-search svg {
  width: 1.05rem;
  height: 1.05rem;
  flex-shrink: 0;
  color: var(--ui-teal-ink);
}

.filter-search input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--ui-ink);
  font-family: inherit;
  font-size: 0.95rem;
  padding: 0.35rem 0;
}

.filter-search input::placeholder { color: var(--ui-ink-muted); }
.filter-search input:focus { outline: none; }
.filter-search input::-webkit-search-cancel-button { cursor: pointer; }

.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.filter-chip {
  border: 1px solid var(--ui-border);
  background: var(--ui-white);
  color: var(--ui-ink-muted);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.22s var(--ui-ease), background 0.22s ease,
              color 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.filter-chip:hover {
  transform: translateY(-1px) scale(1.02);
  border-color: rgba(0, 201, 167, 0.5);
  color: var(--ui-teal-ink);
  box-shadow: 0 6px 14px -8px rgba(0, 201, 167, 0.5);
}

.filter-chip.is-active {
  background: var(--ui-teal);
  border-color: var(--ui-teal);
  color: var(--ui-ink-on-fill);
  box-shadow: 0 8px 18px -8px rgba(0, 201, 167, 0.6);
}

.filter-status {
  flex: 0 0 auto;
  margin: 0 0.5rem 0 auto;
  font-family: var(--ui-font-mono);
  font-size: 0.72rem;
  color: var(--ui-ink-muted);
}

.filter-empty {
  margin: 1.5rem 0 0;
  padding: 1.5rem;
  border: 1px dashed rgba(0, 201, 167, 0.45);
  border-radius: 0.9rem;
  background: rgba(0, 201, 167, 0.07);
  color: var(--ui-ink-muted);
  text-align: center;
}

.filter-empty strong { color: var(--ui-ink); }

/* Items animate out/in as the filter runs */
[data-filter-item] {
  transition: opacity 0.28s ease, transform 0.28s var(--ui-ease);
}

[data-filter-item].is-filtered-out {
  display: none;
}

@media (max-width: 620px) {
  .filter-bar {
    border-radius: 1.1rem;
    align-items: stretch;
  }

  .filter-status {
    margin: 0 0 0 0.65rem;
  }
}

/* ============================================================================
   6. Interactive tool cards
   ========================================================================== */

/* Column layout lets `.tool-meta` pin to the bottom so cards of differing
   content length still line their footers up. */
.tool-item {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  position: relative;
  overflow: hidden;
}

.tool-item .badge {
  align-self: flex-start;
  margin-bottom: 0.75rem;
}

/* Accent wash that blooms in on hover */
.tool-item::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(circle at 85% 0%, rgba(255, 107, 74, 0.14), transparent 55%),
              radial-gradient(circle at 0% 100%, rgba(0, 201, 167, 0.14), transparent 55%);
  transition: opacity 0.35s ease;
}

.tool-item:hover::before { opacity: 1; }

.tool-item > * { position: relative; }

.tool-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.15rem 0 0.9rem;
}

.metric {
  display: inline-flex;
  flex-direction: column;
  gap: 0.05rem;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--ui-border);
  border-radius: 0.6rem;
  background: var(--ui-white);
  transition: transform 0.22s var(--ui-ease), border-color 0.22s ease, box-shadow 0.22s ease;
}

.tool-item:hover .metric {
  border-color: rgba(0, 201, 167, 0.4);
  box-shadow: 0 6px 14px -10px rgba(0, 201, 167, 0.6);
}

.metric-value {
  font-family: var(--ui-font-display);
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--ui-warm-ink);
}

.metric-label {
  font-family: var(--ui-font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ui-ink-muted);
}

.quickstart {
  margin: 0.35rem 0 1rem;
}

.quickstart-label {
  margin: 0 0 0.5rem;
  font-family: var(--ui-font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ui-teal-ink);
}

.qs-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

/* Each chip deep-links into INSTASTACK with a pre-selected stack (#s= config) */
.qs-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid rgba(0, 201, 167, 0.4);
  border-radius: 999px;
  background: rgba(0, 201, 167, 0.10);
  color: #00463E;
  font-size: 0.76rem;
  font-weight: 600;
  transition: transform 0.22s var(--ui-ease), background 0.22s ease,
              border-color 0.22s ease, box-shadow 0.22s ease;
}

.qs-chip:hover {
  transform: translateY(-2px) scale(1.03);
  background: var(--ui-teal);
  border-color: var(--ui-teal);
  color: var(--ui-ink-on-fill);
  box-shadow: 0 10px 20px -10px rgba(0, 201, 167, 0.75);
}

.qs-chip::before {
  content: '▸';
  font-size: 0.7em;
  opacity: 0.8;
}

.tool-meta {
  margin-top: auto;
  padding-top: 0.85rem;
  border-top: 1px solid var(--ui-border);
}

/* Cards for tools that are not shipped yet */
.tool-item.is-upcoming {
  background: var(--ui-glass);
}

.tool-item.is-upcoming .metric-value { color: var(--ui-ink-muted); }

/* ============================================================================
   7. Floating quick-tool launcher
   ========================================================================== */

.quick-launcher {
  position: fixed;
  right: max(1.1rem, env(safe-area-inset-right));
  bottom: max(1.1rem, env(safe-area-inset-bottom));
  z-index: 60;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.6rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px) scale(0.96);
  transition: opacity 0.35s ease, transform 0.35s var(--ui-ease), visibility 0.35s;
}

.quick-launcher.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.ql-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.15rem;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--ui-amber) 0%, var(--ui-coral) 100%);
  color: var(--ui-ink-on-fill);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--ui-ambient-warm);
  transition: transform 0.24s var(--ui-ease), box-shadow 0.24s ease, background 0.24s ease;
}

.ql-toggle:hover {
  transform: translateY(-2px) scale(1.03);
  background: linear-gradient(135deg, #FFA033 0%, var(--ui-amber) 100%);
  box-shadow: 0 26px 52px -18px rgba(255, 140, 0, 0.55),
              0 18px 40px -22px rgba(255, 107, 74, 0.5);
}

.ql-toggle svg {
  width: 1.05rem;
  height: 1.05rem;
}

.ql-toggle .ql-chevron {
  transition: transform 0.3s var(--ui-ease);
}

.quick-launcher.is-open .ql-toggle .ql-chevron {
  transform: rotate(180deg);
}

.ql-panel {
  width: min(19rem, calc(100vw - 2.2rem));
  padding: 0.9rem;
  border: 1px solid var(--ui-border);
  border-radius: 1rem;
  background: var(--ui-glass-strong);
  -webkit-backdrop-filter: var(--ui-glass-blur);
  backdrop-filter: var(--ui-glass-blur);
  box-shadow: var(--ui-glass-edge), 0 28px 60px -24px rgba(255, 107, 74, 0.34),
              0 20px 46px -26px rgba(0, 201, 167, 0.34);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px) scale(0.97);
  transform-origin: bottom right;
  transition: opacity 0.28s ease, transform 0.28s var(--ui-ease), visibility 0.28s;
}

.quick-launcher.is-open .ql-panel {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.ql-title {
  margin: 0 0 0.15rem;
  font-family: var(--ui-font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ui-teal-ink);
}

.ql-sub {
  margin: 0 0 0.7rem;
  font-size: 0.8rem;
  color: var(--ui-ink-muted);
}

.ql-list {
  display: grid;
  gap: 0.35rem;
  margin: 0 0 0.7rem;
  padding: 0;
  list-style: none;
}

.ql-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--ui-border);
  border-radius: 0.6rem;
  background: var(--ui-white);
  color: var(--ui-ink);
  font-size: 0.85rem;
  font-weight: 600;
  transition: transform 0.22s var(--ui-ease), border-color 0.22s ease,
              background 0.22s ease, box-shadow 0.22s ease;
}

.ql-item:hover {
  transform: translateX(3px);
  border-color: rgba(0, 201, 167, 0.5);
  background: rgba(0, 201, 167, 0.09);
  box-shadow: 0 8px 18px -10px rgba(0, 201, 167, 0.6);
}

.ql-item span:last-child {
  font-family: var(--ui-font-mono);
  font-size: 0.66rem;
  color: var(--ui-ink-muted);
}

.ql-launch {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 0.9rem;
  border-radius: 0.6rem;
  background: var(--ui-teal);
  color: var(--ui-ink-on-fill);
  font-size: 0.85rem;
  font-weight: 700;
  transition: transform 0.22s var(--ui-ease), background 0.22s ease, box-shadow 0.22s ease;
}

.ql-launch:hover {
  transform: translateY(-2px) scale(1.02);
  background: #2BDCC0;
  box-shadow: 0 12px 24px -10px rgba(0, 201, 167, 0.7);
}

@media (max-width: 520px) {
  .quick-launcher { gap: 0.5rem; }
  .ql-toggle { padding: 0.7rem 1rem; font-size: 0.85rem; }
}

/* ============================================================================
   8. Reduced motion — disable transforms/animation, keep content visible
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .reveal,
  .reveal-left,
  .reveal-right,
  .reveal-scale {
    opacity: 1 !important;
    transform: none !important;
  }

  .btn-primary::after { display: none; }

  .tool-item:hover,
  .blog-item:hover,
  .eq-part:hover,
  .btn:hover,
  .qs-chip:hover,
  .ql-item:hover,
  .ql-toggle:hover,
  .filter-chip:hover,
  #instastack-app .panel:hover {
    transform: none !important;
  }
}