/* =========================================================
   image-input.css
   - reusable image slot styles (clean)
   ========================================================= */

.img-slot {
  --slot-radius: var(--bs-border-radius);
  --slot-aspect: 4 / 3;
  --ctl-btn-size: clamp(22px, 18cqb, 33px);
  --ctl-btn-offset: clamp(2px, 2.5cqb, 5px);
  --spinner-size: clamp(22px, 18cqb, 68px);
  --hint-fontsize: clamp(.85rem, 9cqb, 1.3rem);
  --hint-bi-size: clamp(1.5rem, 28cqb, 6.5rem);
  --hint-img-size: calc(var(--hint-bi-size) * 1.3);
  --skeleton-base-1: #f2f2f2;
  --skeleton-base-2: #dcdcdc;
  /***/
  --z-img-base: 0; /* .img-clip */
  --z-img-content: 1; /* img */
  --z-img-overlay: 2; /* skeleton / hint / cam-frame */
  --z-img-hover: 3; /* hover / drag overlay */
  --z-img-spinner: 4; /* loading spinner */
  --z-img-controller: 5; /* tool buttons (highest) */
  /***/
  position: relative;
}

[data-bs-theme="dark"] .img-slot {
  --skeleton-base-1: #3a3a3a;
  --skeleton-base-2: #5a5a5a;
}

.img-slot.img-slot-square {
  --slot-aspect: 1 / 1;
}

.img-slot.img-slot-circle {
  --slot-aspect: 1 / 1;
  --slot-radius: 50%;
}

  .img-slot.img-slot-square .img-clip,
  .img-slot.img-slot-circle .img-clip {
    height: 100%;
    width: 100%;
  }

    .img-slot.img-slot-square .img-clip img,
    .img-slot.img-slot-circle .img-clip img {
      object-fit: cover;
    }

/* ---------- preview ---------- */

/* 🔍 inspect mode (default billing) */
.img-slot[data-mode="inspect"] .img-preview {
  --image-input-viewheight: 45vh; /* หรือ 50–70vh */
  height: var(--image-input-viewheight);
  aspect-ratio: auto !important;
}

/* 📷 camera mode */
.img-slot[data-mode="deskcam"] .img-preview {
  aspect-ratio: 4 / 3 !important;
  height: auto !important;
}

.img-preview {
  position: relative;
  width: 100%;
  aspect-ratio: var(--slot-aspect);
  container-type: size;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  border-radius: var(--slot-radius);
  outline: 1px solid var(--bs-border-color);
  cursor: pointer;
  overflow: visible;
}

  .img-preview .img-clip {
    border-radius: inherit;
    overflow: hidden;
    height: 100%;
    background-color: rgba(var(--bs-tertiary-bg-rgb), .4);
    width: 100%;
    background-size: cover;
    transition: opacity .15s ease;
  }

    .img-preview .img-clip img {
      width: 100%;
      height: 100%;
      display: block;
      object-fit: contain;
    }

  /* fallback for extreme aspect ratios */
  .img-preview.fit-contain .img-clip img {
    object-fit: contain;
  }

  /* ---------- hint ---------- */

  .img-preview .img-hint {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    font-size: var(--hint-fontsize);
    color: rgba(var(--bs-secondary-rgb), .6);
    pointer-events: none;
    text-align: center;
    padding: 0 .5rem;
    line-height: 1.25;
  }

    .img-preview .img-hint img {
      width: var(--hint-img-size);
      height: var(--hint-img-size);
      object-fit: contain;
      filter: grayscale(.25) opacity(.35);
    }

    .img-preview .img-hint .bi {
      font-size: var(--hint-bi-size);
      color: rgba(var(--bs-secondary-rgb), .35);
    }

  .img-preview.has-image .img-hint {
    display: none;
  }

  /* ---------- spinner ---------- */

  .img-preview .img-spinner {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    z-index: var(--z-img-spinner);
  }

    .img-preview .img-spinner > .spinner-border,
    .img-preview .img-spinner > .spinner-grow {
      width: var(--spinner-size);
      height: var(--spinner-size);
      border-width: max(2px, calc(var(--spinner-size) * .12));
      color: rgba(var(--bs-tertiary-color-rgb), .6);
      background-color: rgba(var(--bs-tertiary-bg-rgb), .5);
    }

    .img-preview .img-spinner:empty::before {
      content: "";
      width: var(--spinner-size);
      height: var(--spinner-size);
      border-width: max(2px, calc(var(--spinner-size) * .12));
      border-style: solid;
      color: rgba(var(--bs-tertiary-color-rgb), .6);
      border-color: currentColor;
      border-top-color: rgba(var(--bs-tertiary-color-rgb), .15);
      border-radius: 50%;
      background-color: rgba(var(--bs-tertiary-bg-rgb), .5);
      animation: spin 0.8s linear infinite;
    }

    .img-preview .img-spinner.d-none {
      display: none !important;
    }

@media (prefers-reduced-motion: reduce) {
  .img-preview .img-spinner:empty::before {
    animation: none;
  }
}

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

/* ---------- drag & drop ---------- */

.img-preview::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity .15s ease;
  z-index: var(--z-img-hover);
}

.img-preview.hover-enabled:hover {
  outline: none;
}

  .img-preview.hover-enabled.is-dragover::after,
  .img-preview.hover-enabled:hover::after {
    outline: 2px dashed var(--bs-secondary);
    background: rgba(var(--bs-primary-rgb), 0.04);
    box-shadow: var(--bs-box-shadow);
    opacity: 1;
  }

.img-preview.hover-enabled.is-dragover::after {
  outline-color: var(--bs-primary);
}

/* ---------- empty state ---------- */

.img-preview:not(.has-image) .img-clip img {
  visibility: hidden;
}

.img-preview:not(.has-image):not(:has(.img-hint))[data-img-hint]::before {
  content: attr(data-img-hint);
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: clamp(.8rem, 9cqi, 1.3rem);
  color: rgba(var(--bs-secondary-rgb), .6);
  text-align: center;
  padding: 0 .35rem;
  line-height: 1.25;
  pointer-events: none;
  z-index: var(--z-img-overlay);
}

/* ---------- fade-in ---------- */

.img-preview .img-clip img {
  opacity: 0;
  transition: opacity 220ms cubic-bezier(.3, .6, .2, 1); /* Custom fade-in */
  /*transition: opacity 220ms cubic-bezier(.2, .8, .2, 1); -- Soft fade-in (best for images)*/
  /*transition: opacity 220ms cubic-bezier(.4, 0, .2, 1);  -- Standard UI ease (recommended default)*/
  /*transition: opacity 220ms cubic-bezier(.4, 0, .6, 1);  -- Snappy UI (buttons, toggles)*/
  /*transition: opacity 220ms cubic-bezier(0, 0, .2, 1);   -- Deceleration only (lists appearing)*/
  /*transition: opacity 220ms ease-in;                     -- pure ease-in */
}

.img-preview.is-loaded .img-clip img {
  opacity: 1;
}

.img-preview.is-loading .img-clip img {
  opacity: 0;
}

.img-preview.is-loading[data-loading="dim"] .img-clip img {
  opacity: 1;
}

.img-preview.is-loading[data-loading="dim"] .img-clip {
  opacity: .65;
}

/* ---------- skeleton ---------- */

.img-preview.is-loading:not(:has(.img-spinner:not(.d-none)))::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient( 100deg, var(--skeleton-base-1) 30%, var(--skeleton-base-2) 48%, var(--skeleton-base-1) 66% );
  background-size: 400% 100%;
  animation: skeleton-loading 1.2s linear infinite;
  z-index: var(--z-img-overlay);
}

.img-slot.img-slot-circle
.img-preview.is-loading::before {
  border-radius: 50%;
}

@keyframes skeleton-loading {
  0% {
    background-position: 100% 0;
  }

  100% {
    background-position: 0 0;
  }
}

/* ---------- camera overlay ---------- */

.imgcam-frame {
  position: absolute;
  inset: 0;
  z-index: var(--z-img-overlay);
}

/* ---------- controller ---------- */

.img-preview > .img-controller {
  position: absolute;
  top: var(--ctl-btn-offset);
  right: var(--ctl-btn-offset);
  display: flex;
  flex-direction: column;
  gap: var(--ctl-btn-offset);
  z-index: var(--z-img-controller);
  pointer-events: auto;
}

  .img-preview > .img-controller[data-position="left"] {
    left: var(--ctl-btn-offset);
    right: auto;
  }

  .img-preview > .img-controller[data-position="top"] {
    flex-direction: row;
  }

  .img-preview > .img-controller[data-position="bottom"] {
    top: auto;
    bottom: var(--ctl-btn-offset);
    flex-direction: row;
  }

  .img-preview > .img-controller .img-btn {
    width: var(--ctl-btn-size);
    height: var(--ctl-btn-size);
    padding: 0;
    border-radius: 50%;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(var(--bs-secondary-rgb), .65);
    color: var(--bs-light);
    cursor: pointer;
  }

    .img-preview > .img-controller .img-btn:hover:not(:disabled) {
      background: rgba(var(--bs-secondary-rgb), .95);
      transform: scale(1.05);
    }

    .img-preview > .img-controller .img-btn:active:not(:disabled) {
      transform: scale(.95);
    }

    .img-preview > .img-controller .img-btn:disabled {
      opacity: .5;
      cursor: not-allowed;
    }

    .img-preview > .img-controller .img-btn i {
      font-size: calc(var(--ctl-btn-size) * 0.575);
    }

/* =========================================================
   Circle slot – controller in TOP-LEFT corner
   ========================================================= */

.img-slot.img-slot-circle {
  --ctl-arc-x1: -0.15;
  --ctl-arc-y1: -0.0;
  --ctl-arc-x2: -0.35;
  --ctl-arc-y2: -0.15;
  --ctl-arc-x3: -1.175;
  --ctl-arc-y3: 0.15;
}

  .img-slot.img-slot-circle
  .img-preview > .img-controller {
    top: var(--ctl-btn-offset);
    left: var(--ctl-btn-offset);
    right: auto;
  }

    .img-slot.img-slot-circle
    .img-preview > .img-controller .img-btn {
      position: relative;
    }

      /* =========================================
         Circle slot – TOP-LEFT edge hugging
         ========================================= */

      .img-slot.img-slot-circle
      .img-preview > .img-controller .img-btn:nth-child(1) {
        margin-left: calc(var(--ctl-btn-size) * var(--ctl-arc-x1));
        margin-top: calc(var(--ctl-btn-size) * var(--ctl-arc-y1));
      }

      .img-slot.img-slot-circle
      .img-preview > .img-controller .img-btn:nth-child(2) {
        margin-left: calc(var(--ctl-btn-size) * var(--ctl-arc-x2));
        margin-top: calc(var(--ctl-btn-size) * var(--ctl-arc-y2));
      }

      .img-slot.img-slot-circle
      .img-preview > .img-controller .img-btn:nth-child(3) {
        margin-left: calc(var(--ctl-btn-size) * var(--ctl-arc-x3));
        margin-top: calc(var(--ctl-btn-size) * var(--ctl-arc-y3));
      }

/* ===================================
   image controller visibility rule
   =================================== */

@media (min-width: 992px) and (hover: hover) and (pointer: fine) {
  .img-slot .img-controller.img-controller-hover {
    opacity: 0;
    transition: opacity .15s ease;
  }

    .img-slot:hover .img-controller.img-controller-hover,
    .img-slot .img-controller.img-controller-hover:focus-within {
      opacity: 1;
    }
}

.btn[data-prev] {
  position: absolute;
  top: 50%;
  left: 4px;
  transform: translate(0, 0%);
  background-color: rgba(var(--bs-body-color-rgb), .25);
  color: rgba(var(--bs-body-bg-rgb), .8);
  transition: background-color .15s ease;
}

.btn[data-next] {
  position: absolute;
  top: 50%;
  right: 4px;
  transform: translate(0, 0%);
  background-color: rgba(var(--bs-body-color-rgb), .25);
  color: rgba(var(--bs-body-bg-rgb), .8);
  transition: background-color .15s ease;
}

  .btn[data-prev]:hover,
  .btn[data-next]:hover {
    background-color: rgba(var(--bs-body-color-rgb), .5);
    color: rgba(var(--bs-body-bg-rgb), 1);
  }


/* ==== READONLY OVERLAY ==== */

.img-slot.readonly,
.img-slot.readonly * {
  cursor: default;
}

  .img-slot.readonly::after {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(var(--bs-body-color-rgb), 0.08);
    border-radius: inherit;
    pointer-events: none;
  }

  /* 🔒 lock icon */
  .img-slot.readonly::before {
    content: "\F47A"; /* bi-lock */
    font-family: "bootstrap-icons";
    position: absolute;
    top: 4px;
    right: 4px;
    font-size: 28px;
    background-color: rgba(var(--bs-body-color-rgb), .15);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    padding: 3px;
    color: rgba(var(--bs-body-bg-rgb), .65);
    pointer-events: none;
    z-index: 1;
  }

/* ensure positioning */
.img-slot {
  position: relative;
}


/* ==== ZOOM / DRAW MOVE ==== */

.img-clip img[data-scroll-zoom] {
  will-change: transform;
  transition: transform 0.08s linear;
}

.img-clip img[data-scroll-zoom] {
  user-select: none;
}

/* ==== LONG PRESS OPEN DESKTOP CAMERA ==== */

.img-preview.is-pressing {
  outline: 2px solid rgba(var(--bs-primary-rgb), .5);
  outline-offset: 2px;
}