:root {
  color-scheme: light dark;
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
  background-color: #0f172a;
  color: #f8fafc;
  --accent: #38bdf8;
  --muted: rgba(248, 250, 252, 0.7);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: radial-gradient(circle at top, #1d4ed8 0%, #0f172a 40%, #020617 100%);
}

main {
  flex: 1;
  width: min(960px, 94vw);
  margin: 0 auto;
  padding: 1.5rem 0 2.5rem;
}

.app-header,
.app-footer {
  text-align: center;
  padding: 1.5rem 1rem;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(6px);
}

.tagline {
  margin: 0.5rem auto 0;
  max-width: 36rem;
  color: var(--muted);
}

.privacy-note {
  color: #cbd5f5;
  font-size: 0.95rem;
}

.app-nav {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem 0;
  flex-wrap: wrap;
}

.nav-btn,
.primary-btn,
.secondary-btn,
.link-btn {
  cursor: pointer;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 0.75rem 1.35rem;
  font-size: 1rem;
  transition: transform 0.15s ease, box-shadow 0.2s;
}

.nav-btn,
.secondary-btn {
  background: rgba(56, 189, 248, 0.1);
  color: #e0f2fe;
}

.primary-btn {
  background: var(--accent);
  color: #0f172a;
  font-weight: 600;
}

.nav-btn:focus-visible,
.primary-btn:focus-visible,
.secondary-btn:focus-visible,
.link-btn:focus-visible {
  outline: 2px solid #fbcfe8;
  outline-offset: 2px;
}

.primary-btn:disabled,
.secondary-btn:disabled {
  opacity: 0.45;
  pointer-events: none;
}

.link-btn {
  background: none;
  color: #38bdf8;
  padding-inline: 0.5rem;
}

.nav-btn:hover,
.primary-btn:hover,
.secondary-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(8, 145, 178, 0.3);
}

.view {
  margin-top: 2rem;
  background: rgba(15, 23, 42, 0.85);
  border-radius: 1.25rem;
  padding: 1.5rem;
  box-shadow: 0 25px 50px -12px rgba(2, 6, 23, 0.55);
}

.actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.drop-zone {
  border: 2px dashed rgba(56, 189, 248, 0.5);
  border-radius: 1rem;
  padding: 2.5rem 1rem;
  text-align: center;
  color: var(--muted);
  transition: border-color 0.2s ease, background 0.2s;
}

.drop-zone.dragover {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.08);
}

.canvas-wrap {
  width: 100%;
  max-height: 70vh;
  border-radius: 1rem;
  overflow: hidden;
  background: #020617;
  display: flex;
  justify-content: center;
  align-items: center;
}

#previewCanvas {
  width: 100%;
  height: auto;
  max-height: 70vh;
}

.controls {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0 1rem;
}

.controls label {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.95rem;
}

.inline-row { display: flex; align-items: center; gap: 0.5rem; }
.spinner { width: 14px; height: 14px; border: 2px solid rgba(248,250,252,0.25); border-top-color: #38bdf8; border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Loading overlay for image processing */
.loading-overlay { position: fixed; inset: 0; display: grid; place-items: center; background: rgba(15,23,42,0.85); backdrop-filter: blur(4px); z-index: 9999; }
.loading-overlay[hidden] { display: none; }
.loading-dialog { display: flex; flex-direction: column; align-items: center; gap: 16px; padding: 32px; background: rgba(30,41,59,0.95); border: 1px solid rgba(56,189,248,0.4); border-radius: 16px; box-shadow: 0 20px 50px rgba(0,0,0,0.5); }
.spinner-large { width: 56px; height: 56px; border: 5px solid rgba(148,163,184,0.2); border-top-color: #38bdf8; border-radius: 50%; animation: spin 0.7s linear infinite; }
#loadingMessage { margin: 0; font-size: 15px; color: #e2e8f0; font-weight: 500; }

.toggle {
  flex-direction: row;
  align-items: center;
  gap: 0.75rem;
}

.export-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.notice,
.warning {
  background: rgba(253, 224, 71, 0.12);
  border: 1px solid rgba(253, 224, 71, 0.35);
  padding: 0.75rem 1rem;
  border-radius: 0.75rem;
  margin-top: 1rem;
  color: #fde68a;
}

.warning {
  background: rgba(244, 114, 182, 0.12);
  border-color: rgba(244, 114, 182, 0.5);
  color: #f9a8d4;
}

.meta-display {
  margin-top: 1rem;
  font-size: 0.95rem;
  color: #e2e8f0;
}

.metadata-viewer {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(226, 232, 240, 0.2);
  border-radius: 0.75rem;
  padding: 1.5rem;
  margin: 1.5rem 0;
  backdrop-filter: blur(10px);
}

.metadata-viewer h3 {
  margin: 0 0 1rem 0;
  color: #38bdf8;
  font-size: 1.1rem;
}

.metadata-table {
  width: 100%;
  border-collapse: collapse;
}

.metadata-table tr {
  border-bottom: 1px solid rgba(226, 232, 240, 0.1);
}

.metadata-table tr:last-child {
  border-bottom: none;
}

.metadata-table td {
  padding: 0.75rem 0.5rem;
  color: #e2e8f0;
  font-size: 0.95rem;
  vertical-align: top;
}

.metadata-table td:first-child {
  width: 35%;
  color: #94a3b8;
}

.metadata-share-controls {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(226, 232, 240, 0.2);
  border-radius: 0.75rem;
  padding: 1.5rem;
  margin: 1rem 0;
  backdrop-filter: blur(10px);
}

.metadata-share-controls h4 {
  margin: 0 0 0.5rem 0;
  color: #38bdf8;
  font-size: 1rem;
}

.metadata-share-controls .hint-text {
  margin: 0 0 1rem 0;
  color: #94a3b8;
  font-size: 0.9rem;
}

/* History UI removed per user request */

@media (min-width: 720px) {
  .controls {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}