/* =============================================================
   file-converter.css
   Styles for the File Converter tool.
   Requires main.css + tool.css to be loaded first.
   All colours use CSS custom properties from the design system.
   ============================================================= */

/* ---------------------------------------------------------
   Ensure the HTML `hidden` attribute is respected even when
   an element has an explicit `display` rule in this stylesheet.
   Without this, `display: flex` on .fc-file-info etc. would
   override the browser's built-in [hidden] { display:none }.
   --------------------------------------------------------- */
.fc-wrap [hidden] {
  display: none !important;
}

/* ---------------------------------------------------------
   Wrapper: gives the tool-container flex column behaviour
   --------------------------------------------------------- */
.fc-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
  padding: var(--sp-8);
}

/* ---------------------------------------------------------
   Drop Zone
   --------------------------------------------------------- */
.fc-dropzone {
  position: relative;
  border: 2px dashed var(--color-border-solid);
  border-radius: var(--radius-lg);
  background: var(--color-bg-elevated);
  cursor: pointer;
  transition: border-color var(--dur-base) var(--ease),
              background  var(--dur-base) var(--ease);
  outline: none;
}

.fc-dropzone:hover,
.fc-dropzone:focus-visible {
  border-color: var(--color-accent);
  background: var(--color-accent-dim);
}

.fc-dropzone--over {
  border-color: var(--color-accent);
  background: var(--color-accent-dim);
  box-shadow: 0 0 0 4px var(--color-accent-glow);
}

.fc-dropzone__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  padding: var(--sp-16) var(--sp-8);
  text-align: center;
  pointer-events: none; /* clicks fall through to the wrapper */
  user-select: none;
}

.fc-dropzone__icon {
  font-size: 2.5rem;
  line-height: 1;
}

.fc-dropzone__text {
  font-size: 1.0625rem;
  color: var(--color-text);
  margin: 0;
}

.fc-dropzone__browse {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
}

.fc-dropzone__hint {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin: 0;
  letter-spacing: 0.01em;
}

/* hidden file input — occupies full zone for click-to-browse */
.fc-dropzone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

/* ---------------------------------------------------------
   File Info Bar
   --------------------------------------------------------- */
.fc-file-info {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-solid);
  border-radius: var(--radius);
  padding: var(--sp-3) var(--sp-5);
}

/* Format badge (e.g. "MD", "HTML", "DOCX") */
.fc-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3rem;
  padding: var(--sp-1) var(--sp-2);
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.fc-file-info__meta {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.fc-file-info__name {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-strong);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.fc-file-info__size {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.fc-clear-btn {
  flex-shrink: 0;
  background: none;
  border: 1px solid var(--color-border-solid);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  width: 1.75rem;
  height: 1.75rem;
  font-size: 0.75rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease),
              background var(--dur-fast) var(--ease);
}

.fc-clear-btn:hover {
  color: var(--color-text-strong);
  border-color: var(--color-text-muted);
  background: var(--color-bg-hover);
}

/* ---------------------------------------------------------
   Controls: Output Format Selector + Convert Button
   --------------------------------------------------------- */
.fc-controls {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.fc-controls__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0;
}

.fc-format-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.fc-fmt-btn {
  padding: var(--sp-2) var(--sp-4);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-solid);
  border-radius: var(--radius-full);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease),
              background   var(--dur-fast) var(--ease),
              color        var(--dur-fast) var(--ease);
  white-space: nowrap;
}

.fc-fmt-btn:hover:not(:disabled) {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-dim);
}

.fc-fmt-btn[aria-pressed="true"] {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
  font-weight: 600;
}

.fc-fmt-btn:disabled {
  opacity: 0.38;
  cursor: not-allowed;
}

.fc-fmt-ext {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  opacity: 0.8;
  margin-left: var(--sp-1);
}

.fc-convert-btn {
  align-self: flex-start;
  padding: var(--sp-3) var(--sp-8);
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease),
              opacity    var(--dur-fast) var(--ease),
              transform  var(--dur-fast) var(--ease);
}

.fc-convert-btn:hover:not(:disabled) {
  background: var(--color-accent-hover);
}

.fc-convert-btn:active:not(:disabled) {
  transform: scale(0.98);
}

.fc-convert-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ---------------------------------------------------------
   Converting Spinner
   --------------------------------------------------------- */
.fc-status {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  padding: var(--sp-4) 0;
}

.fc-spinner {
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--color-border-solid);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: fc-spin 0.7s linear infinite;
  flex-shrink: 0;
}

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

/* ---------------------------------------------------------
   Error State
   --------------------------------------------------------- */
.fc-error {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius);
  padding: var(--sp-4) var(--sp-5);
  font-size: 0.9375rem;
}

.fc-error__icon {
  font-size: 1.1rem;
  color: #f87171;
  flex-shrink: 0;
}

.fc-error__msg {
  flex: 1;
  color: var(--color-text);
}

.fc-error__retry {
  flex-shrink: 0;
  padding: var(--sp-2) var(--sp-4);
  background: none;
  border: 1px solid rgba(239, 68, 68, 0.5);
  border-radius: var(--radius-full);
  color: #f87171;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease);
}

.fc-error__retry:hover {
  background: rgba(239, 68, 68, 0.15);
}

/* ---------------------------------------------------------
   Result Area
   --------------------------------------------------------- */
.fc-result {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.fc-result__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

.fc-result__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.fc-result__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-wrap: wrap;
}

.fc-result__note {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.fc-download-btn {
  padding: var(--sp-2) var(--sp-5);
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease);
  white-space: nowrap;
}

.fc-download-btn:hover {
  background: var(--color-accent-hover);
}

.fc-new-btn {
  padding: var(--sp-2) var(--sp-5);
  background: none;
  border: 1px solid var(--color-border-solid);
  border-radius: var(--radius-full);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease),
              color        var(--dur-fast) var(--ease);
  white-space: nowrap;
}

.fc-new-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ---------------------------------------------------------
   Preview — iframe + pre
   --------------------------------------------------------- */
.fc-preview-wrap {
  border: 1px solid var(--color-border-solid);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff; /* preview always shown on white bg */
}

.fc-preview-frame {
  width: 100%;
  height: 480px;
  border: none;
  display: block;
}

.fc-preview-pre {
  margin: 0;
  padding: var(--sp-5) var(--sp-6);
  background: var(--color-bg-elevated);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 480px;
  overflow-y: auto;
}

/* ---------------------------------------------------------
   Responsive adjustments
   --------------------------------------------------------- */
@media (max-width: 640px) {
  .fc-wrap {
    padding: var(--sp-5);
    gap: var(--sp-5);
  }

  .fc-dropzone__inner {
    padding: var(--sp-10) var(--sp-5);
  }

  .fc-format-group {
    gap: var(--sp-2);
  }

  .fc-fmt-btn {
    padding: var(--sp-2) var(--sp-3);
    font-size: 0.8125rem;
  }

  .fc-result__header {
    flex-direction: column;
    align-items: flex-start;
  }

  .fc-preview-frame {
    height: 360px;
  }
}