:root {
  color-scheme: light dark;

  --bg: #fafafa;
  --bg-secondary: #f4f4f5;
  --surface: #ffffff;
  --border: #d4d4d8;
  --text: #18181b;
  --text-secondary: #52525b;
  --accent: #2563eb;
  --accent-text: #ffffff;
  --shadow: 0 8px 32px #00000014;
  --radius: 12px;

  /* Viewer chrome is always dark so it reads over any image */
  --chrome-bg: #000000cc;
  --chrome-border: #ffffff26;
  --chrome-text: #f4f4f5;
  --chrome-text-dim: #a1a1aa;

  --stage-bg: #000000;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #09090b;
    --bg-secondary: #18181b;
    --surface: #131316;
    --border: #3f3f46;
    --text: #fafafa;
    --text-secondary: #a1a1aa;
    --accent: #60a5fa;
    --accent-text: #09090b;
    --shadow: 0 8px 32px #0009;
  }
}

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

[hidden] {
  display: none !important;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  line-height: 1.5;
  overscroll-behavior: none;
}

/* ─── Empty state ─────────────────────────────────────────────────────── */

.empty {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 1rem;
}

.empty-card {
  width: 100%;
  max-width: 32rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 2.5rem 1.25rem;
  background: var(--surface);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--text);
  font: inherit;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.15s;

  &:hover,
  &:focus-visible {
    border-color: var(--accent);
    background: var(--bg-secondary);
  }

  &:active {
    transform: scale(0.995);
  }
}

.empty-icon {
  display: block;
  width: 3rem;
  height: 3rem;
  color: var(--accent);

  & svg {
    width: 100%;
    height: 100%;
  }
}

.empty-title {
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.empty-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 24rem;
  text-wrap: balance;
}

.empty-hint {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  opacity: 0.75;
}

.empty-note {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-align: center;
}

@media (min-width: 640px) {
  .empty-card {
    padding: 3.5rem 2rem;
  }
}

/* Drag feedback across the whole window */
body.dragover .empty-card {
  border-color: var(--accent);
  background: var(--bg-secondary);
}

body.dragover::after {
  content: "";
  position: fixed;
  inset: 0.5rem;
  border: 2px dashed var(--accent);
  border-radius: var(--radius);
  pointer-events: none;
  z-index: 50;
}

/* ─── Viewer ──────────────────────────────────────────────────────────── */

.viewer {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  background: var(--stage-bg);
}

.stage {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  background: var(--stage-bg);
}

/* Blurred backdrop, only for the "blur" background setting */
.stage::before {
  content: "";
  position: absolute;
  inset: -5%;
  background-image: var(--img-url);
  background-size: cover;
  background-position: center;
  filter: blur(2.5rem) brightness(0.55);
  opacity: 0;
  transition: opacity 0.2s;
}

.viewer[data-bg="blur"] .stage::before {
  opacity: 1;
}

.frame {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  transform: translate(-50%, -50%) rotate(0deg);
  transition: transform 0.25s ease;
}

#image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.viewer[data-fit="cover"] #image {
  object-fit: cover;
}

.viewer[data-fit="none"] #image {
  object-fit: none;
}

.dim {
  position: absolute;
  inset: 0;
  background: #000;
  opacity: calc(var(--dim, 0) / 100);
  pointer-events: none;
  transition: opacity 0.2s;
}

/* ─── Clock overlay ───────────────────────────────────────────────────── */

.clock {
  position: absolute;
  top: max(2.5rem, env(safe-area-inset-top));
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  color: #fff;
  text-shadow: 0 2px 12px #000000b3;
  pointer-events: none;
  font-variant-numeric: tabular-nums;
}

.clock-time {
  font-size: clamp(2.75rem, 16vw, 6rem);
  font-weight: 250;
  letter-spacing: -0.02em;
  line-height: 1;
}

.clock-date {
  font-size: clamp(0.8rem, 3.5vw, 1.1rem);
  font-weight: 500;
  letter-spacing: 0.02em;
  opacity: 0.9;
}

/* ─── Toolbar ─────────────────────────────────────────────────────────── */

.toolbar {
  flex-shrink: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 0.75rem;
  padding-bottom: max(0.625rem, env(safe-area-inset-bottom));
  background: var(--chrome-bg);
  border-top: 1px solid var(--chrome-border);
  backdrop-filter: blur(12px);
  color: var(--chrome-text);
}

.file-name {
  flex: 1 1 100%;
  min-width: 0;
  font-size: 0.75rem;
  color: var(--chrome-text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.actions {
  flex: 1 1 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

@media (min-width: 640px) {
  .toolbar {
    flex-wrap: nowrap;
    padding: 0.75rem 1rem;
  }

  .file-name {
    flex: 0 1 auto;
    font-size: 0.8rem;
  }

  .actions {
    justify-content: flex-end;
    flex-wrap: nowrap;
  }
}

/* ─── Buttons ─────────────────────────────────────────────────────────── */

.action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4em;
  padding: 0.5em 0.85em;
  min-height: 2.5rem;
  border-radius: 8px;
  border: 1px solid var(--chrome-border);
  background: #ffffff14;
  color: var(--chrome-text);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;

  &:hover {
    background: #ffffff26;
  }

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

.action-btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);

  &:hover {
    background: color-mix(in srgb, var(--accent) 85%, #fff);
  }
}

.action-btn-icon {
  padding: 0.5em;
  width: 2.5rem;
}

/* Wake-lock host wraps its button; keep it inert as a layout box */
wake-lock {
  display: inline-flex;
}

/* Lit dot when the wake lock is held */
.dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.35;
  transition: opacity 0.15s, background 0.15s, box-shadow 0.15s;
}

wake-lock[active] .action-btn {
  border-color: #22c55e;
  color: #86efac;
}

wake-lock[active] .dot {
  background: #22c55e;
  opacity: 1;
  box-shadow: 0 0 0.5rem #22c55e;
}

.btn-text {
  display: none;
}

@media (min-width: 420px) {
  .btn-text {
    display: inline;
  }
}

/* ─── Shared icons ────────────────────────────────────────────────────── */

.icon-mask {
  display: inline-block;
  background-color: currentColor;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-size: contain;
  mask-size: contain;
}

.icon-settings {
  width: 1.25rem;
  height: 1.25rem;
  -webkit-mask-image: url(/icons/settings.svg);
  mask-image: url(/icons/settings.svg);
}

/* ─── Locked mode ─────────────────────────────────────────────────────── */

.lock-chrome {
  position: fixed;
  left: 50%;
  bottom: max(1.5rem, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  display: none;
  opacity: 0;
  transition: opacity 0.25s;
  z-index: 10;
}

.lock-chrome .action-btn {
  background: var(--chrome-bg);
  backdrop-filter: blur(12px);
}

body.locked {
  cursor: none;
}

body.locked .toolbar {
  display: none;
}

body.locked .lock-chrome {
  display: block;
}

body.locked.chrome-visible {
  cursor: auto;
}

body.locked.chrome-visible .lock-chrome {
  opacity: 1;
}

/* ─── Status toast ────────────────────────────────────────────────────── */

.status {
  position: fixed;
  left: 50%;
  top: max(1rem, env(safe-area-inset-top));
  transform: translateX(-50%);
  max-width: min(90vw, 30rem);
  padding: 0.6rem 1rem;
  border-radius: 8px;
  background: var(--chrome-bg);
  border: 1px solid var(--chrome-border);
  backdrop-filter: blur(12px);
  color: var(--chrome-text);
  font-size: 0.85rem;
  text-align: center;
  z-index: 100;
}

/* ─── Settings dialog ─────────────────────────────────────────────────── */

dialog {
  padding: 0;
  margin: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  width: min(28rem, calc(100vw - 2rem));
  max-height: calc(100dvh - 2rem);
  box-shadow: var(--shadow);

  &::backdrop {
    background: #000000a6;
    backdrop-filter: blur(2px);
  }
}

.dialog-inner {
  display: flex;
  flex-direction: column;
  max-height: inherit;
}

.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);

  & h2 {
    font-size: 1.05rem;
    font-weight: 650;
  }

  & .action-btn {
    border-color: var(--border);
    background: transparent;
    color: var(--text-secondary);

    &:hover {
      background: var(--bg-secondary);
      color: var(--text);
    }
  }
}

.dialog-body {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;

  & label {
    font-size: 0.85rem;
    font-weight: 550;
    display: flex;
    justify-content: space-between;
    gap: 0.5rem;
  }

  & select,
  & input[type="range"] {
    width: 100%;
    font: inherit;
    font-size: 0.9rem;
  }

  & select {
    padding: 0.55rem 0.6rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text);
  }

  & input[type="range"] {
    accent-color: var(--accent);
  }
}

.field-value {
  color: var(--text-secondary);
  font-weight: 400;
  font-variant-numeric: tabular-nums;
}

.field-check {
  flex-direction: row;
  align-items: center;
  gap: 0.6rem;

  & input {
    width: 1.1rem;
    height: 1.1rem;
    accent-color: var(--accent);
    flex-shrink: 0;
  }

  & label {
    font-weight: 450;
    display: block;
  }
}

.dialog-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  padding-bottom: max(1rem, env(safe-area-inset-bottom));
  border-top: 1px solid var(--border);

  & .action-btn {
    border-color: var(--border);
    background: var(--bg-secondary);
    color: var(--text);

    &:hover {
      background: var(--border);
    }
  }

  & .action-btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--accent-text);

    &:hover {
      background: color-mix(in srgb, var(--accent) 85%, var(--text));
    }
  }
}

.support-note {
  flex: 1 1 14rem;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

@media (max-width: 639px) {
  dialog {
    inset: 0;
    margin: 0;
    width: 100vw;
    height: 100dvh;
    max-width: 100vw;
    max-height: 100dvh;
    border-radius: 0;
  }

  .dialog-inner {
    height: 100%;
  }

  .dialog-footer {
    & .action-btn {
      flex: 1 1 auto;
    }
  }
}