/* ============================================================
   FILE PREVIEW PAGE  — page-file-preview.php
   ============================================================ */

/* ── Top bar ──────────────────────────────────────────────── */
.fp-topbar {
  position: sticky;
  top: 0;
  z-index: 200;
  padding: 1rem 0;
  background: rgba(17, 14, 10, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}

.fp-topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.fp-topbar__logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.01em;
}

.fp-topbar__accent {
  color: var(--az-orange);
  font-style: italic;
}

.fp-topbar__back {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--fs-small);
  color: var(--text-muted);
  transition: color var(--trans-base);
}

.fp-topbar__back:hover { color: var(--az-orange); }

/* ── Page wrapper ─────────────────────────────────────────── */
.fp {
  min-height: 100vh;
  background: var(--az-dark-1);
}

/* ── Page header ──────────────────────────────────────────── */
.fp__header {
  padding: clamp(3rem, 7vw, 5rem) 0 clamp(2rem, 4vw, 3rem);
  text-align: center;
}

.fp__overline {
  font-family: var(--font-mono);
  font-size: var(--fs-overline);
  color: var(--az-orange);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.fp__title {
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  color: var(--text-primary);
  line-height: 1.15;
  margin-bottom: 1.25rem;
}

.fp__title em {
  color: var(--az-orange);
  font-style: italic;
}

.fp__subtitle {
  font-size: var(--fs-body-lg);
  color: var(--text-secondary);
  max-width: 560px;
  margin-inline: auto;
  line-height: 1.7;
}

/* ── Drop section ─────────────────────────────────────────── */
.fp__drop-section {
  padding-bottom: clamp(2rem, 4vw, 3rem);
}

/* Drop zone */
.fp__dropzone {
  border: 1.5px dashed var(--border-orange);
  border-radius: var(--radius-lg);
  background: var(--az-dark-2);
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--trans-base), background var(--trans-base);
  position: relative;
  overflow: hidden;
}

.fp__dropzone--over {
  border-color: var(--az-orange);
  background: var(--az-dark-3);
}

.fp__drop-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 3rem 2rem;
  text-align: center;
}

.fp__drop-icon {
  color: var(--az-orange);
  opacity: 0.7;
  margin-bottom: 0.5rem;
}

.fp__drop-label {
  font-size: var(--fs-body-lg);
  color: var(--text-primary);
  font-weight: 500;
}

.fp__drop-or {
  font-size: var(--fs-small);
  color: var(--text-muted);
}

.fp__file-label {
  cursor: pointer;
}

.fp__drop-formats {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  color: var(--text-muted);
  letter-spacing: 0.04em;
  margin-top: 0.25rem;
}

/* Loading spinner */
.fp__loading:not([hidden]) {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 3rem 2rem;
  color: var(--text-secondary);
  font-size: var(--fs-small);
}

.fp__spinner {
  width: 36px;
  height: 36px;
  border: 2px solid var(--border-medium);
  border-top-color: var(--az-orange);
  border-radius: 50%;
  animation: fp-spin 0.8s linear infinite;
}

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

@media (prefers-reduced-motion: reduce) {
  .fp__spinner { animation: none; opacity: 0.5; }
}

/* Error */
.fp__error:not([hidden]) {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  margin-top: 1rem;
  padding: 1rem 1.25rem;
  background: rgba(220, 50, 50, 0.08);
  border: 1px solid rgba(220, 50, 50, 0.25);
  border-radius: var(--radius-md);
  color: #f08080;
  font-size: var(--fs-small);
}

.fp__error svg { flex-shrink: 0; }

#fp-error-msg { flex: 1; min-width: 160px; }

/* ── Canvas viewer ────────────────────────────────────────── */
.fp__viewer { padding-bottom: var(--space-2xl); }

/* Desktop two-column: sticky canvas left, scrollable content right */
@media (min-width: 900px) {
  .fp__viewer {
    padding-bottom: 0;
  }

  .fp__viewer-layout {
    display: grid;
    grid-template-columns: 55% 45%;
    align-items: start; /* required — without this, sticky won't activate in grid */
    min-height: 100svh;
    min-height: 100vh; /* fallback */
  }

  .fp__canvas-col {
    position: sticky;
    top: 0;
    height: 100vh;
    height: 100svh;
    border-right: 1px solid var(--border-subtle);
  }

  .fp__canvas-col .fp__canvas-wrap {
    height: 100%;
    border-bottom: none;
  }

  .fp__content-col {
    padding: var(--space-xl) var(--space-lg) var(--space-2xl);
  }

  /* Widen stats grid in the narrower content column */
  .fp__content-col .fp__stats {
    grid-template-columns: 1fr 1fr;
  }

  .fp__content-col .fp__cta {
    max-width: none;
  }
}

.fp__canvas-wrap {
  position: relative;
  width: 100%;
  height: clamp(360px, 62vh, 700px);
  background: var(--az-dark-1);
  border-bottom: 1px solid var(--border-subtle);
  overflow: hidden;
}

#fp-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.fp__canvas-hint {
  position: absolute;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  color: var(--text-muted);
  letter-spacing: 0.06em;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0.7;
}

.fp__reload-btn {
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  background: rgba(17, 14, 10, 0.75);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-full);
  border: 1px solid var(--border-medium);
  color: var(--text-muted);
  font-size: var(--fs-small);
  font-family: var(--font-body);
  cursor: pointer;
  transition: color var(--trans-base), border-color var(--trans-base);
}

.fp__reload-btn:hover {
  color: var(--az-orange);
  border-color: var(--az-orange);
}

/* ── Stats grid ───────────────────────────────────────────── */
.fp__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  background: var(--border-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: var(--space-lg) 0 var(--space-md);
}

.fp__stat {
  background: var(--az-dark-2);
  padding: 1.25rem 1.5rem;
}

.fp__stat-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.fp__stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--az-orange);
  word-break: break-all;
}

/* ── Privacy note ─────────────────────────────────────────── */
.fp__privacy-note {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  color: var(--text-muted);
  letter-spacing: 0.04em;
  margin-bottom: var(--space-xl);
}

/* ── CTA ──────────────────────────────────────────────────── */
.fp__cta {
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-xl);
  max-width: 560px;
}

.fp__cta-title {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.fp__cta-body {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.fp__cta-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ── Mobile ───────────────────────────────────────────────── */
@media (max-width: 600px) {
  .fp__canvas-hint { display: none; }
  .fp__stats { grid-template-columns: 1fr 1fr; }
  .fp__cta-btns { flex-direction: column; }
  .fp__cta-btns .btn { width: 100%; justify-content: center; }
}