/*
 * prox-components.css — shared component primitives
 *
 * - .prox-modal — single modal pattern with focus-trap / Esc / backdrop
 * - .prox-btn — single button system (primary / ghost / danger / success, sizes sm/md/lg)
 * - .prox-state — empty / loading / error states with consistent layout
 * - .prox-skeleton — shimmer loader for thumbnails
 * - .prox-bulk-bar — floating bulk-action bar
 * - .prox-input — uniform form fields
 *
 * Loaded after prox-tokens.css. Class prefix is intentionally `prox-` so
 * it never collides with existing CSS during the migration. Migrating a
 * component is a matter of changing `class="..."` in the HTML/JS — the
 * old styles can be left in place as a fallback while we transition.
 */

/* ────────────────────────────────────────────────────────────────
 * Modal
 * Use:
 *   <div class="prox-modal" data-prox-modal>
 *     <div class="prox-modal-backdrop"></div>
 *     <div class="prox-modal-panel" role="dialog" aria-modal="true">
 *       <header class="prox-modal-header">
 *         <h2 class="prox-modal-title">…</h2>
 *         <button class="prox-modal-close" aria-label="Close">×</button>
 *       </header>
 *       <div class="prox-modal-body">…</div>
 *       <footer class="prox-modal-footer">…</footer>
 *     </div>
 *   </div>
 * Toggle by setting `.is-open` on the .prox-modal.
 * Behavior is wired by prox-modal.js (Esc, click-outside, focus-trap).
 * ──────────────────────────────────────────────────────────────── */
.prox-modal {
  position: fixed;
  inset: 0;
  z-index: var(--prox-z-modal);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--prox-space-4);
}
.prox-modal.is-open { display: flex; }

.prox-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: prox-modal-fade-in var(--prox-duration-fast) var(--prox-ease-out);
}

.prox-modal-panel {
  position: relative;
  width: 100%;
  max-width: 480px;
  max-height: calc(100vh - var(--prox-space-8));
  background: var(--prox-surface-2);
  border: 1px solid var(--prox-border);
  border-radius: var(--prox-radius-xl);
  box-shadow: var(--prox-shadow-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: prox-modal-slide-in var(--prox-duration-base) var(--prox-ease-out);
}
.prox-modal-panel.size-md { max-width: 560px; }
.prox-modal-panel.size-lg { max-width: 720px; }
.prox-modal-panel.size-xl { max-width: 960px; }

@keyframes prox-modal-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes prox-modal-slide-in {
  from { opacity: 0; transform: translateY(8px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.prox-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--prox-space-3);
  padding: var(--prox-space-5) var(--prox-space-6);
  border-bottom: 1px solid var(--prox-border);
}
.prox-modal-title {
  margin: 0;
  font-size: var(--prox-text-xl);
  font-weight: var(--prox-weight-semibold);
  letter-spacing: var(--prox-tracking-tight);
  color: var(--prox-text-primary);
}
.prox-modal-close {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--prox-text-tertiary);
  font-size: 22px;
  line-height: 1;
  border-radius: var(--prox-radius-sm);
  cursor: pointer;
  transition: background var(--prox-duration-fast) var(--prox-ease-out),
              color      var(--prox-duration-fast) var(--prox-ease-out);
}
.prox-modal-close:hover {
  background: var(--prox-surface-3);
  color: var(--prox-text-primary);
}
.prox-modal-close:focus-visible {
  outline: none;
  box-shadow: var(--prox-shadow-glow);
}

.prox-modal-body {
  padding: var(--prox-space-6);
  overflow-y: auto;
  flex: 1;
}

.prox-modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--prox-space-3);
  padding: var(--prox-space-4) var(--prox-space-6);
  border-top: 1px solid var(--prox-border);
  background: var(--prox-surface-1);
}

/* ────────────────────────────────────────────────────────────────
 * Buttons
 * .prox-btn → base + .prox-btn-{primary|ghost|danger|success|gradient}
 * Sizes: .is-sm / .is-md (default) / .is-lg
 * State: :disabled or [aria-busy="true"]
 * Optional: <span class="prox-btn-spinner"></span> inside for progress
 * ──────────────────────────────────────────────────────────────── */
.prox-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--prox-space-2);
  padding: 10px 18px;
  font-family: var(--prox-font-sans);
  font-size: var(--prox-text-base);
  font-weight: var(--prox-weight-semibold);
  letter-spacing: var(--prox-tracking-normal);
  border: 1px solid transparent;
  border-radius: var(--prox-radius-md);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  transition: background    var(--prox-duration-fast) var(--prox-ease-out),
              border-color  var(--prox-duration-fast) var(--prox-ease-out),
              color         var(--prox-duration-fast) var(--prox-ease-out),
              transform     var(--prox-duration-fast) var(--prox-ease-out),
              box-shadow    var(--prox-duration-fast) var(--prox-ease-out);
}
.prox-btn:focus-visible {
  outline: none;
  box-shadow: var(--prox-shadow-glow);
}
.prox-btn:disabled,
.prox-btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
}
.prox-btn:active:not(:disabled):not([aria-busy="true"]) {
  transform: translateY(1px);
}

.prox-btn.is-sm  { padding:  6px 12px; font-size: var(--prox-text-sm); border-radius: var(--prox-radius-sm); }
.prox-btn.is-lg  { padding: 14px 24px; font-size: var(--prox-text-md); border-radius: var(--prox-radius-lg); }
.prox-btn.is-block { display: flex; width: 100%; }

.prox-btn-primary {
  background: var(--prox-accent);
  color: var(--prox-text-on-accent);
  border-color: var(--prox-accent);
}
.prox-btn-primary:hover:not(:disabled):not([aria-busy="true"]) {
  background: var(--prox-accent-hover);
  border-color: var(--prox-accent-hover);
}

.prox-btn-gradient {
  background: var(--prox-gradient);
  background-size: 150% 150%;
  color: var(--prox-text-on-accent);
  border-color: transparent;
  transition: opacity var(--prox-duration-fast) var(--prox-ease-out),
              background-position var(--prox-duration-slow) var(--prox-ease-out),
              transform var(--prox-duration-fast) var(--prox-ease-out),
              box-shadow var(--prox-duration-fast) var(--prox-ease-out);
}
.prox-btn-gradient:hover:not(:disabled):not([aria-busy="true"]) {
  background-position: 100% 100%;
  box-shadow: var(--prox-shadow-md), var(--prox-shadow-glow);
}

.prox-btn-ghost {
  background: transparent;
  color: var(--prox-text-primary);
  border-color: var(--prox-border-strong);
}
.prox-btn-ghost:hover:not(:disabled):not([aria-busy="true"]) {
  background: var(--prox-surface-3);
  border-color: var(--prox-text-tertiary);
}

.prox-btn-danger {
  background: transparent;
  color: var(--prox-danger);
  border-color: rgba(239, 68, 68, 0.5);
}
.prox-btn-danger:hover:not(:disabled):not([aria-busy="true"]) {
  background: var(--prox-danger-soft);
  border-color: var(--prox-danger);
}

.prox-btn-success {
  background: transparent;
  color: var(--prox-success);
  border-color: rgba(16, 185, 129, 0.5);
}
.prox-btn-success:hover:not(:disabled):not([aria-busy="true"]) {
  background: var(--prox-success-soft);
  border-color: var(--prox-success);
}

/* Inline spinner for buttons in busy state */
.prox-btn-spinner {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: prox-spin 0.7s linear infinite;
  flex-shrink: 0;
}
.prox-btn[aria-busy="true"] {
  cursor: progress;
}
@keyframes prox-spin { to { transform: rotate(360deg); } }

/* ────────────────────────────────────────────────────────────────
 * State components — empty / loading / error
 * ──────────────────────────────────────────────────────────────── */
.prox-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--prox-space-12) var(--prox-space-5);
  min-height: 320px;
  gap: var(--prox-space-3);
  color: var(--prox-text-tertiary);
}
.prox-state-illus {
  width: 56px;
  height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--prox-radius-pill);
  background: var(--prox-surface-2);
  border: 1px solid var(--prox-border);
  font-size: 26px;
  margin-bottom: var(--prox-space-1);
  color: var(--prox-text-secondary);
}
.prox-state-title {
  margin: 0;
  font-size: var(--prox-text-lg);
  font-weight: var(--prox-weight-semibold);
  color: var(--prox-text-primary);
}
.prox-state-body {
  margin: 0;
  font-size: var(--prox-text-sm);
  color: var(--prox-text-tertiary);
  max-width: 360px;
  line-height: var(--prox-leading-normal);
}
.prox-state-actions {
  display: flex;
  gap: var(--prox-space-2);
  margin-top: var(--prox-space-3);
  flex-wrap: wrap;
  justify-content: center;
}

.prox-state.is-loading .prox-state-illus {
  background: transparent;
  border-color: var(--prox-border-strong);
  border-top-color: var(--prox-accent);
  border-style: solid;
  border-width: 3px;
  animation: prox-spin 0.8s linear infinite;
  font-size: 0;
}
.prox-state.is-error .prox-state-illus {
  background: var(--prox-danger-soft);
  border-color: rgba(239, 68, 68, 0.4);
  color: var(--prox-danger);
}

/* ────────────────────────────────────────────────────────────────
 * Skeleton loader
 * Applies a shimmering placeholder look. Set width/height inline.
 * ──────────────────────────────────────────────────────────────── */
.prox-skeleton {
  position: relative;
  background: var(--prox-surface-2);
  overflow: hidden;
  border-radius: var(--prox-radius-md);
}
.prox-skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.04) 50%,
    transparent 100%
  );
  animation: prox-skeleton-sweep 1.4s ease-in-out infinite;
}
@keyframes prox-skeleton-sweep {
  from { transform: translateX(-100%); }
  to   { transform: translateX(100%);  }
}

/* ────────────────────────────────────────────────────────────────
 * Floating bulk-action bar
 * Use:
 *   <div class="prox-bulk-bar" data-prox-bulk-bar hidden>
 *     <span class="prox-bulk-bar-count">0 selected</span>
 *     <div class="prox-bulk-bar-actions">…buttons…</div>
 *   </div>
 * Toggle by removing the `hidden` attribute and updating count text.
 * ──────────────────────────────────────────────────────────────── */
.prox-bulk-bar {
  position: fixed;
  left: 50%;
  bottom: max(var(--prox-space-6), env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: var(--prox-z-overlay);
  display: flex;
  align-items: center;
  gap: var(--prox-space-4);
  padding: var(--prox-space-2) var(--prox-space-2) var(--prox-space-2) var(--prox-space-5);
  background: var(--prox-surface-3);
  border: 1px solid var(--prox-border-strong);
  border-radius: var(--prox-radius-pill);
  box-shadow: var(--prox-shadow-lg);
  animation: prox-bulk-bar-rise var(--prox-duration-base) var(--prox-ease-spring);
  max-width: calc(100vw - var(--prox-space-6));
}
.prox-bulk-bar[hidden] { display: none; }
.prox-bulk-bar-count {
  font-size: var(--prox-text-sm);
  font-weight: var(--prox-weight-semibold);
  color: var(--prox-text-primary);
  white-space: nowrap;
}
.prox-bulk-bar-actions {
  display: flex;
  gap: var(--prox-space-1);
  align-items: center;
}
.prox-bulk-bar-actions .prox-btn {
  padding: 8px 14px;
  font-size: var(--prox-text-sm);
}
.prox-bulk-bar-clear {
  background: transparent;
  border: none;
  color: var(--prox-text-tertiary);
  font-size: 18px;
  width: 32px;
  height: 32px;
  border-radius: var(--prox-radius-pill);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background var(--prox-duration-fast) var(--prox-ease-out),
              color      var(--prox-duration-fast) var(--prox-ease-out);
}
.prox-bulk-bar-clear:hover {
  background: var(--prox-surface-4);
  color: var(--prox-text-primary);
}
@keyframes prox-bulk-bar-rise {
  from { opacity: 0; transform: translate(-50%, 24px); }
  to   { opacity: 1; transform: translate(-50%, 0);    }
}

/* ────────────────────────────────────────────────────────────────
 * Form fields
 * ──────────────────────────────────────────────────────────────── */
.prox-input {
  width: 100%;
  padding: 10px 14px;
  font-family: var(--prox-font-sans);
  font-size: var(--prox-text-md);
  color: var(--prox-text-primary);
  background: var(--prox-surface-2);
  border: 1px solid var(--prox-border-strong);
  border-radius: var(--prox-radius-md);
  outline: none;
  transition: border-color var(--prox-duration-fast) var(--prox-ease-out),
              box-shadow   var(--prox-duration-fast) var(--prox-ease-out);
}
.prox-input::placeholder { color: var(--prox-text-quaternary); }
.prox-input:focus {
  border-color: var(--prox-accent);
  box-shadow: var(--prox-shadow-glow);
}
.prox-input.is-invalid {
  border-color: var(--prox-danger);
  animation: prox-shake 240ms var(--prox-ease-in-out);
}
@keyframes prox-shake {
  0%, 100% { transform: translateX(0); }
  20%      { transform: translateX(-5px); }
  40%      { transform: translateX(5px); }
  60%      { transform: translateX(-3px); }
  80%      { transform: translateX(3px); }
}

.prox-input-with-action {
  position: relative;
}
.prox-input-with-action .prox-input { padding-right: 44px; }
.prox-input-action-btn {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--prox-text-tertiary);
  font-size: 16px;
  border-radius: var(--prox-radius-sm);
  cursor: pointer;
  transition: color var(--prox-duration-fast) var(--prox-ease-out);
}
.prox-input-action-btn:hover { color: var(--prox-text-primary); }

/* ────────────────────────────────────────────────────────────────
 * Tooltip helper
 * Use: <span data-prox-tooltip="…">…</span>
 * ──────────────────────────────────────────────────────────────── */
[data-prox-tooltip] { position: relative; }
[data-prox-tooltip]::after {
  content: attr(data-prox-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 10px;
  background: var(--prox-surface-4);
  color: var(--prox-text-primary);
  border: 1px solid var(--prox-border-strong);
  border-radius: var(--prox-radius-sm);
  font-size: var(--prox-text-xs);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  z-index: var(--prox-z-tooltip);
  transition: opacity var(--prox-duration-fast) var(--prox-ease-out);
  box-shadow: var(--prox-shadow-md);
}
[data-prox-tooltip]:hover::after,
[data-prox-tooltip]:focus-visible::after { opacity: 1; }

/* ────────────────────────────────────────────────────────────────
 * Sticky-bottom CTA on mobile (recipient pages)
 * ──────────────────────────────────────────────────────────────── */
.prox-sticky-cta {
  display: none;
}
@media (max-width: 640px) {
  .prox-sticky-cta {
    display: block;
    position: sticky;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--prox-space-3) var(--prox-space-4) calc(var(--prox-space-3) + env(safe-area-inset-bottom));
    background: linear-gradient(180deg, transparent 0%, var(--prox-bg) 30%);
    z-index: var(--prox-z-sticky);
  }
  .prox-sticky-cta .prox-btn { width: 100%; }
}

/* ────────────────────────────────────────────────────────────────
 * Recipient: sender attribution
 * ──────────────────────────────────────────────────────────────── */
.prox-sender-attr {
  display: inline-flex;
  align-items: center;
  gap: var(--prox-space-2);
  padding: var(--prox-space-2) var(--prox-space-3);
  background: var(--prox-surface-2);
  border: 1px solid var(--prox-border);
  border-radius: var(--prox-radius-pill);
  font-size: var(--prox-text-xs);
  color: var(--prox-text-secondary);
}
.prox-sender-avatar {
  width: 22px;
  height: 22px;
  border-radius: var(--prox-radius-pill);
  background: var(--prox-gradient);
  color: #fff;
  font-size: 10px;
  font-weight: var(--prox-weight-bold);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-transform: uppercase;
  flex-shrink: 0;
}
.prox-sender-attr-label {
  color: var(--prox-text-tertiary);
}

/* ────────────────────────────────────────────────────────────────
 * Downloaded checkmark badge (recipient persistence)
 * ──────────────────────────────────────────────────────────────── */
.prox-downloaded-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  background: var(--prox-success-soft);
  color: var(--prox-success);
  border-radius: var(--prox-radius-pill);
  font-size: var(--prox-text-micro);
  font-weight: var(--prox-weight-semibold);
}

/* ────────────────────────────────────────────────────────────────
 * Inline share-row metric chip (sender portal)
 * ──────────────────────────────────────────────────────────────── */
.prox-metric-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  background: var(--prox-surface-3);
  border: 1px solid var(--prox-border);
  border-radius: var(--prox-radius-pill);
  font-size: var(--prox-text-micro);
  color: var(--prox-text-tertiary);
  font-weight: var(--prox-weight-medium);
}
.prox-metric-chip strong {
  color: var(--prox-text-primary);
  font-weight: var(--prox-weight-semibold);
}

/* ────────────────────────────────────────────────────────────────
 * First-upload micro-celebration
 * Apply .prox-celebrate to any element to trigger a one-shot
 * checkmark scale-in animation. Removed via JS after firing.
 * ──────────────────────────────────────────────────────────────── */
.prox-celebrate {
  position: relative;
}
.prox-celebrate::before {
  content: "✓";
  position: absolute;
  top: 8px;
  right: 8px;
  width: 28px;
  height: 28px;
  background: var(--prox-success);
  color: #fff;
  font-size: 16px;
  font-weight: var(--prox-weight-bold);
  border-radius: var(--prox-radius-pill);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--prox-shadow-md);
  animation: prox-celebrate-pop 1.2s var(--prox-ease-spring) forwards;
  z-index: var(--prox-z-base);
}
@keyframes prox-celebrate-pop {
  0%   { opacity: 0; transform: scale(0.2); }
  30%  { opacity: 1; transform: scale(1.15); }
  60%  { opacity: 1; transform: scale(1);    }
  90%  { opacity: 1; transform: scale(1);    }
  100% { opacity: 0; transform: scale(0.9);  }
}