:root {
  --paper: #e8e7e3;
  --mat: #f6f5f2;
  --ink: #1a1d1f;
  --ink-soft: #5d6164;
  --rule: #c9c7c0;
  --marigold: #e2a312;
  --marigold-ink: #4a3300;
  --serif: "Newsreader", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --row-h: clamp(110px, 22vw, 230px);
  --gap: 6px;
  --gutter: clamp(12px, 3vw, 40px);
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #17191a;
    --mat: #202325;
    --ink: #ecebe6;
    --ink-soft: #9a9d9f;
    --rule: #34383a;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.5 var(--sans);
  min-height: 100vh;
}

button,
input {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

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

/* ---------- message and PIN screens ---------- */

.center {
  min-height: 100vh;
  display: grid;
  place-content: center;
  gap: 12px;
  padding: var(--gutter);
  max-width: 34rem;
  margin: 0 auto;
}

.center h1 {
  font: 400 clamp(1.8rem, 5vw, 2.6rem) / 1.15 var(--serif);
  margin: 0;
}

.center p {
  margin: 0;
  color: var(--ink-soft);
}

.pin-form {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.pin-form input {
  flex: 1;
  min-width: 0;
  padding: 12px 14px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--mat);
  letter-spacing: 0.3em;
  font-size: 1.25rem;
}

.btn {
  padding: 11px 20px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  background: var(--ink);
  color: var(--paper);
}

.btn.ghost {
  background: transparent;
  color: var(--ink);
}

.btn[disabled] {
  opacity: 0.55;
  cursor: progress;
}

.error {
  color: #a3341f;
  min-height: 1.5em;
}

@media (prefers-color-scheme: dark) {
  .error {
    color: #ff9e8a;
  }
}

/* ---------- header and moment bar ---------- */

.top {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: clamp(20px, 5vw, 56px) var(--gutter) 18px;
}

.top h1 {
  font: 400 clamp(2rem, 6vw, 3.6rem) / 1.05 var(--serif);
  letter-spacing: -0.01em;
  margin: 0;
}

.top .count {
  margin: 6px 0 0;
  color: var(--ink-soft);
}

.actions {
  display: flex;
  gap: 8px;
}

.actions .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.actions .btn[aria-pressed="true"] {
  background: var(--marigold);
  border-color: var(--marigold);
  color: var(--marigold-ink);
}

.moments {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  gap: 22px;
  overflow-x: auto;
  padding: 10px var(--gutter);
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  scrollbar-width: none;
}

.moments::-webkit-scrollbar {
  display: none;
}

.moments a {
  flex: none;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}

.moments a[aria-current="true"] {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* ---------- grid ---------- */

main {
  padding: 0 var(--gutter) 80px;
}

.moment h2 {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font: 400 clamp(1.5rem, 4vw, 2.2rem) / 1.1 var(--serif);
  margin: 44px 0 16px;
  scroll-margin-top: 56px;
}

.moment h2 small {
  font: 400 0.9rem var(--sans);
  color: var(--ink-soft);
}

.grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap);
  list-style: none;
  margin: 0;
  padding: 0;
}

.grid::after {
  content: "";
  flex-grow: 1000;
}

.tile {
  position: relative;
  height: var(--row-h);
  flex-grow: calc(var(--ar) * 100);
  flex-basis: calc(var(--ar) * var(--row-h));
  min-width: 0;
  background: var(--mat);
  overflow: hidden;
}

.tile img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  user-select: none;
}

.tile .open {
  position: absolute;
  inset: 0;
  border: 0;
  background: transparent;
  padding: 0;
}

.star {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 0;
  background: transparent;
  padding: 0;
}

.star svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: #fff;
  stroke-width: 1.6;
  stroke-linejoin: round;
  filter: drop-shadow(0 1px 2px rgb(0 0 0 / 0.55));
}

.tile.starred .star svg,
.viewer .star[aria-pressed="true"] svg {
  fill: var(--marigold);
  stroke: var(--marigold);
}

.star.pop svg {
  animation: pop 0.22s ease-out;
}

@keyframes pop {
  50% {
    transform: scale(1.35);
  }
}

@media (hover: hover) {
  .tile:not(.starred) .star {
    opacity: 0;
    transition: opacity 0.12s;
  }

  .tile:hover .star,
  .tile:focus-within .star {
    opacity: 1;
  }
}

.only-stars .tile:not(.starred) {
  display: none;
}

.only-stars .moment:not(.has-stars) {
  display: none;
}

.empty-favs {
  max-width: 30rem;
  margin: 64px 0;
  color: var(--ink-soft);
}

.empty-favs strong {
  display: block;
  font: 400 1.6rem / 1.2 var(--serif);
  color: var(--ink);
  margin-bottom: 6px;
}

/* ---------- viewer ---------- */

dialog {
  border: 0;
  padding: 0;
  color: var(--ink);
}

dialog::backdrop {
  background: rgb(10 11 12 / 0.55);
}

.viewer {
  width: 100vw;
  max-width: none;
  height: 100dvh;
  max-height: none;
  background: #0f1112;
  color: #ecebe6;
}

.viewer .stage {
  position: absolute;
  inset: 0 0 64px 0;
  display: grid;
  place-items: center;
  touch-action: pan-y;
}

.viewer .stage img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  user-select: none;
}

.viewer .bar {
  position: absolute;
  inset: auto 0 0 0;
  height: 64px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.viewer .bar .where {
  flex: 1;
  color: #aeb1b3;
  font-size: 0.9rem;
}

/* The star is absolutely placed on grid tiles; inside the viewer bar it is a normal button. */
.viewer .bar .star {
  position: static;
  width: 44px;
}

.viewer .icon-btn,
.viewer .bar a {
  min-width: 44px;
  height: 44px;
  display: inline-grid;
  place-items: center;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: #ecebe6;
  text-decoration: none;
  padding: 0 10px;
}

.viewer .icon-btn:hover,
.viewer .bar a:hover {
  background: rgb(255 255 255 / 0.1);
}

.viewer .nav {
  position: absolute;
  top: 0;
  bottom: 64px;
  width: 20%;
  min-width: 56px;
  border: 0;
  background: transparent;
  color: #ecebe6;
  font-size: 2rem;
  opacity: 0;
  transition: opacity 0.15s;
}

.viewer .nav:hover,
.viewer .nav:focus-visible {
  opacity: 1;
}

.viewer .nav.prev {
  left: 0;
}

.viewer .nav.next {
  right: 0;
}

.viewer :focus-visible {
  outline-color: #ecebe6;
}

@media (hover: none) {
  .viewer .nav {
    display: none;
  }
}

/* ---------- downloads sheet ---------- */

.sheet {
  width: min(34rem, calc(100vw - 24px));
  max-height: calc(100dvh - 24px);
  background: var(--mat);
  border-radius: 6px;
  padding: 24px;
  overflow: auto;
}

.sheet h2 {
  font: 400 1.8rem / 1.1 var(--serif);
  margin: 0 0 6px;
}

.sheet h3 {
  font: 500 1.15rem / 1.2 var(--serif);
  margin: 26px 0 6px;
}

.sheet p {
  margin: 0 0 12px;
  color: var(--ink-soft);
}

.sheet ul {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--rule);
}

.sheet li a {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
  text-decoration: none;
}

.sheet li a:hover {
  background: var(--paper);
}

.sheet li a span {
  color: var(--ink-soft);
}

.sheet progress {
  width: 100%;
  height: 6px;
  margin: 8px 0;
  accent-color: var(--marigold);
}

.sheet .row {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* ---------- toast ---------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(20px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  max-width: min(28rem, calc(100vw - 24px));
  padding: 10px 16px;
  border-radius: 4px;
  background: var(--ink);
  color: var(--paper);
  z-index: 100;
}

.toast[hidden] {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  .star.pop svg {
    animation: none;
  }

  * {
    transition: none !important;
  }
}