/* -----------------------------------------------------------------------------
   Random Image — theme and layout
   ----------------------------------------------------------------------------- */

:root {
  --bg: #0f1724;
  --bg-end: #071024;
  --surface: rgba(255, 255, 255, 0.03);
  --accent: #38bdf8;
  --accent-contrast: #052029;
  --muted: #9ca3af;
  --text: #e6eef8;
  --radius: 10px;
  --radius-sm: 8px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-end) 100%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  overflow-x: hidden;
}

/* Main content */
.wrap {
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 24px;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(20px, 4vw, 34px);
}

.hint {
  color: var(--muted);
  margin: 6px 0 18px;
}

/* Image container */
.viewer {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  padding: 12px;
  border-radius: var(--radius);
  min-height: 200px;
  position: relative;
}

.viewer img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  display: block;
  opacity: 0;
  transform: scale(0.995);
  transition: opacity 0.28s ease, transform 0.28s ease;
}

.loader {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(56, 189, 248, 0.25);
  border-top-color: var(--accent);
  border-radius: 50%;
  position: absolute;
  opacity: 0;
  transition: opacity 0.2s ease;
  animation: spin 0.9s linear infinite;
}

.viewer.loading .loader {
  opacity: 1;
}

.viewer img.visible {
  opacity: 1;
  transform: scale(1);
}

/* Controls */
.controls {
  margin-top: 14px;
  display: flex;
  gap: 8px;
}

.controls button {
  background: var(--accent);
  color: var(--accent-contrast);
  border: 0;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease;
}

.controls button:hover {
  filter: brightness(1.1);
}

.controls button:active {
  transform: translateY(1px);
}

.controls button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.controls button[aria-busy="true"],
.controls button:disabled {
  opacity: 0.8;
  cursor: wait;
}

.small {
  color: var(--muted);
  font-size: 13px;
  margin-top: 12px;
}

.status {
  color: var(--muted);
  margin-top: 10px;
  font-size: 14px;
  min-height: 20px;
}

.noscript {
  color: var(--muted);
  text-align: center;
  padding: 8px 12px;
}

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

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .viewer img {
    transition: none;
  }
  .loader {
    animation: none;
  }
}