/* =========================================================
   ui.css — device optimization + interaction layer
   Loader, mobile nav, tooltips, modals, progress bar, micro-fx
   ========================================================= */

html{ -webkit-text-size-adjust: 100%; overflow-x: hidden; }
body{ overflow-x: hidden; }
img, svg, video{ max-width: 100%; height: auto; }

/* ---------------- page loader ---------------- */
.page-loader{
  position: fixed; inset: 0; z-index: 3000;
  background: var(--cream);
  display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 14px;
  transition: opacity .5s var(--ease), visibility .5s var(--ease);
}
.page-loader.hide{ opacity: 0; visibility: hidden; pointer-events: none; }
.loader-bloom{ width: 46px; height: 46px; animation: spin 1.4s linear infinite; }
.loader-bloom svg{ width: 100%; height: 100%; }
.page-loader p{ font-family: var(--font-display); font-style: italic; color: var(--plum-quiet); font-size: 0.95rem; }

/* ---------------- mobile nav ---------------- */
.nav-burger{
  display: none; width: 42px; height: 42px; border-radius: 50%;
  align-items: center; justify-content: center; flex-direction: column; gap: 4px;
  background: transparent;
}
.nav-burger span{ width: 20px; height: 2px; background: var(--plum); border-radius: 2px; transition: all .3s var(--ease); }
.nav-burger.active span:nth-child(1){ transform: translateY(6px) rotate(45deg); }
.nav-burger.active span:nth-child(2){ opacity: 0; }
.nav-burger.active span:nth-child(3){ transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 780px){
  .nav-burger{ display: flex; }
  .nav-links{
    position: fixed; top: 0; right: 0; height: 100dvh; width: min(78vw, 320px);
    background: var(--cream); flex-direction: column; align-items: flex-start;
    padding: 100px 30px 30px; gap: 26px !important;
    transform: translateX(100%); transition: transform .45s var(--ease);
    box-shadow: -18px 0 40px rgba(62,44,63,0.12);
    z-index: 900;
  }
  .nav-links.open{ transform: translateX(0); }
  .nav-links a{ font-size: 1.05rem; }
  .nav-scrim{
    position: fixed; inset: 0; background: rgba(62,44,63,0.28); z-index: 400;
    opacity: 0; visibility: hidden; transition: all .35s var(--ease);
  }
  .nav-scrim.show{ opacity: 1; visibility: visible; }
}

/* ---------------- touch targets ---------------- */
@media (pointer: coarse){
  .btn, .step-tab, .flower-chip, .option-tile, .swatch, .effect-chip, .toggle-pill,
  .align-btn, .font-swatch, .share-icon, .deco-toggle, .template-chip{
    min-height: 40px;
  }
  .swatch{ width: 40px; height: 40px; }
}

/* ---------------- tooltips ---------------- */
[data-tooltip]{ position: relative; }
[data-tooltip]::after{
  content: attr(data-tooltip);
  position: absolute; bottom: calc(100% + 10px); left: 50%; transform: translateX(-50%) translateY(4px);
  background: var(--plum); color: var(--cream); font-size: 0.72rem; line-height: 1.4;
  padding: 7px 11px; border-radius: 8px; white-space: nowrap; max-width: 220px; white-space: normal; width: max-content; max-width: 200px; text-align:center;
  opacity: 0; pointer-events: none; transition: all .2s var(--ease); z-index: 200;
  box-shadow: var(--shadow-soft);
}
[data-tooltip]::before{
  content:''; position: absolute; bottom: calc(100% + 5px); left: 50%; transform: translateX(-50%);
  border: 5px solid transparent; border-top-color: var(--plum);
  opacity: 0; transition: all .2s var(--ease); pointer-events:none; z-index: 200;
}
[data-tooltip]:hover::after, [data-tooltip]:focus-visible::after,
[data-tooltip]:hover::before, [data-tooltip]:focus-visible::before{
  opacity: 1; transform: translateX(-50%) translateY(0);
}
@media (pointer: coarse){ [data-tooltip]::after, [data-tooltip]::before{ display:none; } }

/* ---------------- modal ---------------- */
.modal-scrim{
  position: fixed; inset: 0; background: rgba(62,44,63,0.35); backdrop-filter: blur(3px);
  display: flex; align-items: center; justify-content: center; padding: 20px;
  z-index: 2000; opacity: 0; visibility: hidden; transition: all .3s var(--ease);
}
.modal-scrim.show{ opacity: 1; visibility: visible; }
.modal-box{
  background: var(--white); border-radius: var(--radius-l); padding: 32px;
  max-width: 420px; width: 100%; box-shadow: var(--shadow-deep);
  transform: translateY(16px) scale(0.97); transition: transform .35s var(--ease);
  text-align: center;
}
.modal-scrim.show .modal-box{ transform: translateY(0) scale(1); }
.modal-box h3{ font-family: var(--font-serif-alt); font-size: 1.3rem; margin-bottom: 10px; }
.modal-box p{ color: var(--plum-quiet); font-size: 0.92rem; line-height: 1.6; margin-bottom: 24px; }
.modal-actions{ display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ---------------- progress bar (multi-step) ---------------- */
.progress-track{
  height: 5px; border-radius: 999px; background: rgba(62,44,63,0.08); overflow: hidden; margin: 4px 0 22px;
}
.progress-fill{
  height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--blush-deep), var(--lavender-deep));
  width: 0%; transition: width .5s var(--ease);
}

/* ---------------- drag reorder ---------------- */
.stem-row{ cursor: grab; }
.stem-row.dragging{ opacity: 0.4; cursor: grabbing; }
.stem-row.drag-over{ border-top: 2px solid var(--gold); }
.drag-handle{ opacity: 0.4; margin-right: 6px; font-size: 0.9rem; }

/* ---------------- cursor glow (hero only, desktop) ---------------- */
.cursor-glow{
  position: fixed; width: 260px; height: 260px; border-radius: 50%; pointer-events: none;
  background: radial-gradient(circle, rgba(203,185,227,0.28), transparent 70%);
  transform: translate(-50%,-50%); z-index: 1; opacity: 0; transition: opacity .4s var(--ease);
  will-change: transform;
}
.cursor-glow.show{ opacity: 1; }
@media (pointer: coarse), (max-width: 780px){ .cursor-glow{ display: none; } }

/* ---------------- page transition fade ---------------- */
body.page-transition{ animation: fadeIn .5s var(--ease); }
.transition-link-active{ animation: fadeOutPage .35s var(--ease) forwards; }
@keyframes fadeOutPage{ to{ opacity: 0; transform: translateY(-8px); } }

/* ---------------- skeleton / lazy fade for images ---------------- */
img[loading="lazy"]{ opacity: 0; transition: opacity .5s var(--ease); }
img[loading="lazy"].loaded{ opacity: 1; }

/* ---------------- floating "next step" button ---------------- */
.fab-next{
  position: fixed; right: 22px; bottom: 22px; z-index: 700;
  display: flex; align-items: center; gap: 8px;
  padding: 14px 22px; border-radius: 999px;
  background: linear-gradient(135deg, var(--blush-deep), var(--lavender-deep));
  color: var(--white); font-size: 0.9rem; font-weight: 500;
  box-shadow: var(--shadow-deep);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.fab-next:hover{ transform: translateY(-3px) scale(1.03); }
@media (max-width: 680px){
  .fab-next{ right: 14px; bottom: 14px; padding: 12px 18px; font-size: 0.84rem; }
}
@media (prefers-reduced-motion: reduce){
  .page-loader, .nav-links, .modal-scrim, .modal-box, .cursor-glow{ transition: none !important; animation: none !important; }
}