:root {
  --bg: #0b0d10;
  --panel: #12161b;
  --panel-soft: #171c22;
  --line: #262d36;
  --text: #ebeff5;
  --muted: #9ca6b4;
  --btn: #edf1f6;
  --btn-text: #0b0d10;
  --btn-idle: #1a2028;
  --btn-idle-text: #bac3d0;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Avenir Next", "Helvetica Neue", "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
}

body {
  padding-top: max(8px, env(safe-area-inset-top));
  padding-right: max(8px, env(safe-area-inset-right));
  padding-bottom: max(8px, env(safe-area-inset-bottom));
  padding-left: max(8px, env(safe-area-inset-left));
}

.app {
  width: min(1120px, 100%);
  margin: 0 auto;
  min-height: calc(var(--app-vh, 100dvh) - 16px);
  max-height: calc(var(--app-vh, 100dvh) - 16px);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 10px;
}

.topbar {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

h1 {
  margin: 0;
  font-size: 1.03rem;
  font-weight: 630;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

h1 span {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.9rem;
}

.privacy-copy {
  margin: 0;
  font-size: 0.76rem;
  line-height: 1.3;
  color: var(--muted);
}

.mode-switch {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #0f1318;
  padding: 3px;
}

.mode-btn {
  border: 0;
  background: transparent;
  border-radius: 8px;
  color: var(--btn-idle-text);
  font-size: 0.86rem;
  font-weight: 600;
  padding: 8px 14px;
  cursor: pointer;
}

.mode-btn.active {
  background: var(--btn);
  color: var(--btn-text);
}

.screen {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  min-height: 0;
  overflow: hidden;
}

.screen[hidden] {
  display: none !important;
}

#liveScreen {
  padding: 10px;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 10px;
}

.viewer-wrap {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: #06080b;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.view-layers {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.view-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#viewBaby {
  z-index: 2;
  /* clip-path will be set via JS based on orientation */
}

#viewAdult {
  z-index: 1;
}

.split-line {
  position: absolute;
  background: rgba(255, 255, 255, 0.7);
  z-index: 3;
  pointer-events: none;
}

/* Vertical split (mobile default) */
@media (max-width: 899px) {
  #viewBaby {
    -webkit-clip-path: inset(50% 0 0 0);
    clip-path: inset(50% 0 0 0);
  }
  .split-line {
    top: 50%;
    left: 0;
    width: 100%;
    height: 2px;
    transform: translateY(-50%);
  }
}

/* Horizontal split (desktop) */
@media (min-width: 900px) {
  #viewBaby {
    -webkit-clip-path: inset(0 0 0 50%);
    clip-path: inset(0 0 0 50%);
  }
  .split-line {
    top: 0;
    left: 50%;
    width: 2px;
    height: 100%;
    transform: translateX(-50%);
  }
}

.view-labels {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 5;
  padding: 12px;
}

.label-tag {
  position: absolute;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
}

/* Position for mobile */
@media (max-width: 899px) {
  .adult-tag { top: 12px; left: 12px; }
  .baby-tag { top: calc(50% + 12px); left: 12px; }
}

/* Position for desktop */
@media (min-width: 900px) {
  .adult-tag { top: 12px; left: 12px; }
  .baby-tag { top: 12px; left: calc(50% + 12px); }
}

#viewfinder {
  display: none;
}

#camera {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.flip-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  z-index: 10;
  cursor: pointer;
  transition: background 0.2s;
}

.flip-btn:active {
  background: rgba(0, 0, 0, 0.7);
}

.status {
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: 8px;
  font-size: 0.75rem;
  color: #e7ebf2;
  background: rgb(0 0 0 / 0.55);
  border-radius: 8px;
  padding: 6px 8px;
}

.controls {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  background: var(--panel-soft);
  display: grid;
  gap: 8px;
}

.controls label {
  font-size: 0.94rem;
}

#ageSlider {
  width: 100%;
  accent-color: #dbe2eb;
}

datalist {
  display: none;
}

.age-breakpoints {
  position: relative;
  height: 18px;
}

.age-breakpoints span {
  position: absolute;
  left: var(--mark);
  transform: translateX(-50%);
  font-size: 0.68rem;
  color: var(--muted);
}

.age-breakpoints span::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 5px;
  background: #5f6a78;
}

.age-breakpoints span:last-child {
  transform: translateX(-100%);
}

.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

button {
  border: 1px solid #d8dee8;
  background: #d8dee8;
  color: #0a0d11;
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 0.86rem;
  font-weight: 610;
  cursor: pointer;
  touch-action: manipulation;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

input,
button,
label {
  -webkit-tap-highlight-color: transparent;
}

#photoScreen {
  padding: 10px;
}

.photo-layout {
  height: 100%;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(210px, 280px) 1fr;
  gap: 10px;
  align-items: start;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

.source-card,
.tile {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 7px;
  background: #0f141a;
}

.source-card {
  display: grid;
  gap: 7px;
}

.source-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

#sourceLabel {
  font-size: 0.78rem;
  font-weight: 600;
  color: #d4dbe6;
}

#photoInput {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.file-btn {
  display: inline-block;
  border: 1px solid #d8dee8;
  border-radius: 8px;
  padding: 6px 9px;
  font-size: 0.74rem;
  font-weight: 600;
  color: #11151b;
  background: #d8dee8;
  cursor: pointer;
}

#comparisonMeta {
  margin: 0;
  font-size: 0.74rem;
  line-height: 1.3;
  color: var(--muted);
}

.source-card canvas {
  width: 100%;
  display: block;
  aspect-ratio: 4 / 3;
  border-radius: 7px;
  background: #05070a;
  max-height: clamp(110px, 20vh, 180px);
}

.month-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
  align-content: start;
}

.tile canvas {
  width: 100%;
  display: block;
  aspect-ratio: 4 / 3;
  border-radius: 7px;
  background: #05070a;
  max-height: clamp(72px, 12vh, 112px);
}

.tile figcaption {
  margin-top: 4px;
  text-align: center;
  font-size: 0.72rem;
  color: #aeb7c5;
}

@media (max-width: 860px) {
  .topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .brand-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .mode-switch {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .photo-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto;
  }

  .month-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 580px) {
  .button-row {
    grid-template-columns: 1fr;
  }

  .month-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}