/* =============================================================================
 * A Snapshot in History — styles
 * Darkroom palette: ink, photo paper, safelight amber. Tailwind handles layout
 * utilities; this file owns the components.
 * ========================================================================== */

:root {
  --ink: #14110f;
  --ink-2: #1d1916;
  --ink-3: #2a2420;
  --line: rgba(242, 234, 217, 0.12);
  --paper: #f2ead9;
  --paper-dim: rgba(242, 234, 217, 0.66);
  --amber: #e7a33e;
  --amber-hi: #f4bd62;
  --safelight: #d6402f;
  --sage: #8fb59a;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

html, body {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

[hidden] { display: none !important; }

button { cursor: pointer; font: inherit; }
button:disabled { cursor: not-allowed; }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }

/* ------------------------------------------------------------------ header */
.topbar {
  background: var(--ink);
  border-bottom: 1px solid var(--line);
  position: relative;
  z-index: 20;
}
.brand { color: var(--paper); text-decoration: none; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.brand-name em, .card-title em { font-style: italic; font-weight: 500; color: var(--amber); }
.brand-mark {
  /* a tiny contact-sheet frame */
  width: 26px; height: 20px; flex: none;
  border: 2px solid var(--paper);
  border-radius: 3px;
  position: relative;
  background: linear-gradient(135deg, transparent 55%, var(--amber) 55%);
}
.brand-mark::before {
  content: '';
  position: absolute; left: 4px; top: 3px;
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--paper);
}
.brand-mark-lg { width: 46px; height: 34px; border-width: 3px; margin: 0 auto 0.9rem; display: block; }
.brand-mark-lg::before { width: 8px; height: 8px; left: 7px; top: 5px; }

@media (max-width: 520px) {
  .brand-name { font-size: 0.95rem; }
}

.stat {
  display: flex; flex-direction: column; align-items: flex-end;
  padding: 0.3rem 0.75rem;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  min-width: 4.5rem;
}
.stat-label {
  font-size: 0.65rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--paper-dim);
}
.stat-value { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; line-height: 1.15; }
.stat-dim { color: var(--paper-dim); font-weight: 500; }

/* ------------------------------------------------------------------ viewer */
.viewer {
  overflow: hidden;
  background:
    radial-gradient(ellipse at center, #241e1a 0%, var(--ink) 75%);
  touch-action: none;
  cursor: grab;
  user-select: none;
}
.viewer.is-dragging { cursor: grabbing; }
.photo-wrap {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  padding: 12px;
}
.photo {
  max-width: 100%; max-height: 100%;
  object-fit: contain;
  transform-origin: center center;
  will-change: transform;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.55);
  border-radius: 4px;
  opacity: 0;
  transition: opacity 0.35s ease;
}
.photo.is-loaded { opacity: 1; }
.photo.is-animating { transition: transform 0.2s ease, opacity 0.35s ease; }

.photo-state {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 0.6rem; text-align: center; padding: 1.5rem;
  color: var(--paper-dim);
  pointer-events: none;
}
.photo-error {
  color: var(--paper);
  background:
    repeating-linear-gradient(45deg, rgba(242, 234, 217, 0.025) 0 12px, transparent 12px 24px);
}
.spinner {
  width: 34px; height: 34px; border-radius: 50%;
  border: 3px solid var(--line); border-top-color: var(--amber);
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.zoom-controls {
  position: absolute; left: 12px; top: 12px; z-index: 5;
  display: flex; flex-direction: column; gap: 6px;
}
.icon-btn {
  width: 36px; height: 36px; border-radius: 10px;
  background: rgba(20, 17, 15, 0.82); color: var(--paper);
  border: 1px solid var(--line);
  font-size: 1.15rem; line-height: 1;
  backdrop-filter: blur(6px);
}
.icon-btn:hover { background: var(--ink-3); }

/* --------------------------------------------------------------- map panel */
.map-panel {
  --w-collapsed: 300px; --h-collapsed: 210px;
  --w-expanded: min(620px, calc(100vw - 32px));
  --h-expanded: min(460px, calc(100% - 32px));
  position: absolute; right: 16px; bottom: 16px; z-index: 10;
  width: var(--w-collapsed); height: var(--h-collapsed);
  display: flex; flex-direction: column;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  opacity: 0.88;
  transition: width 0.28s ease, height 0.28s ease, opacity 0.2s ease;
}
.map-panel.is-expanded { width: var(--w-expanded); height: var(--h-expanded); opacity: 1; }
@media (hover: hover) and (pointer: fine) {
  .map-panel:hover { width: var(--w-expanded); height: var(--h-expanded); opacity: 1; }
}
@media (max-width: 640px) {
  .map-panel {
    --w-collapsed: 46vw; --h-collapsed: 130px;
    --w-expanded: calc(100vw - 20px); --h-expanded: calc(100% - 20px);
    right: 10px; bottom: 10px;
  }
}

.map-head {
  display: flex; align-items: center; justify-content: space-between; gap: 6px;
  padding: 6px 6px 6px 10px;
  border-bottom: 1px solid var(--line);
  font-size: 0.75rem; color: var(--paper-dim);
  flex: none;
}
.map-hint { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.map-btn {
  width: 28px; height: 28px; border-radius: 8px;
  display: grid; place-items: center;
  background: transparent; color: var(--paper-dim);
  border: 1px solid transparent;
}
.map-btn:hover { background: var(--ink-3); color: var(--paper); }
.map-btn[aria-pressed='true'] { color: var(--amber); border-color: rgba(231, 163, 62, 0.4); }
.map { flex: 1; min-height: 0; background: #aad3df; cursor: crosshair; }
.map-panel.is-locked .map { cursor: grab; }

/* Leaflet tweaks */
.leaflet-container { font-family: var(--font-body); }
.leaflet-control-attribution { font-size: 10px; }

.pin { position: relative; width: 26px; height: 36px; }
.pin svg { width: 100%; height: 100%; filter: drop-shadow(0 3px 4px rgba(0, 0, 0, 0.45)); }
.pin-label {
  position: absolute; left: 50%; bottom: 100%; transform: translate(-50%, -2px);
  white-space: nowrap; font-size: 11px; font-weight: 700;
  background: var(--ink); color: var(--paper);
  padding: 2px 6px; border-radius: 6px;
}

/* ------------------------------------------------------------- control bar */
.controlbar {
  background: var(--ink);
  border-top: 1px solid var(--line);
  position: relative; z-index: 20;
}
.field-label {
  font-size: 0.68rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--paper-dim);
}
.year-out {
  font-family: var(--font-display); font-weight: 700; font-size: 1.6rem; line-height: 1;
  color: var(--amber);
}
.year-out[data-unset='true'] { font-family: var(--font-body); font-size: 0.85rem; font-weight: 500; color: var(--paper-dim); }

.year-slider {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 28px; background: transparent; margin: 2px 0 0;
  --fill: 50%;
}
.year-slider::-webkit-slider-runnable-track {
  height: 6px; border-radius: 999px;
  background: linear-gradient(to right, var(--amber) var(--fill), var(--ink-3) var(--fill));
}
.year-slider::-moz-range-track { height: 6px; border-radius: 999px; background: var(--ink-3); }
.year-slider::-moz-range-progress { height: 6px; border-radius: 999px; background: var(--amber); }
.year-slider::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 22px; height: 22px; margin-top: -8px; border-radius: 50%;
  background: var(--paper); border: 4px solid var(--amber);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}
.year-slider::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--paper); border: 4px solid var(--amber);
}
.year-slider.is-unset { --fill: 0%; }
.year-slider.is-unset::-webkit-slider-thumb { border-color: var(--paper-dim); }
.year-slider.is-unset::-moz-range-thumb { border-color: var(--paper-dim); }
.year-slider.is-unset::-moz-range-progress { background: transparent; }
.year-slider:disabled { opacity: 0.5; }
.year-slider:focus-visible { outline: none; }
.year-slider:focus-visible::-webkit-slider-thumb { box-shadow: 0 0 0 4px rgba(231, 163, 62, 0.45); }
.year-slider:focus-visible::-moz-range-thumb { box-shadow: 0 0 0 4px rgba(231, 163, 62, 0.45); }

.ticks {
  position: relative; height: 1em; margin: -2px 11px 0; /* 11px = half the thumb, so labels line up with it */
  font-size: 0.65rem; color: var(--paper-dim); opacity: 0.7;
}
.ticks span { position: absolute; top: 0; transform: translateX(-50%); white-space: nowrap; }
.step-btn {
  flex: none; width: 38px; height: 38px; border-radius: 10px;
  background: var(--ink-2); color: var(--paper);
  border: 1px solid var(--line); font-size: 1.4rem; line-height: 1;
}
.step-btn:hover:not(:disabled) { background: var(--ink-3); }
.step-btn:disabled { opacity: 0.4; }

.checklist { display: flex; gap: 0.75rem; font-size: 0.78rem; color: var(--paper-dim); }
.checklist li { display: flex; align-items: center; gap: 0.35rem; white-space: nowrap; }
.checklist li::before {
  content: ''; width: 14px; height: 14px; border-radius: 50%;
  border: 1.5px solid var(--paper-dim);
}
.checklist li.is-done { color: var(--paper); }
.checklist li.is-done::before {
  border-color: var(--sage);
  background: var(--sage) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.5l2.5 2.5L12 5.5' stroke='%2314110f' stroke-width='2.2' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/100% no-repeat;
}

.primary-btn {
  padding: 0.8rem 1.5rem; border-radius: 12px;
  background: var(--amber); color: var(--ink);
  font-weight: 700; letter-spacing: 0.01em; white-space: nowrap;
  border: 0;
  box-shadow: 0 6px 18px rgba(231, 163, 62, 0.25);
  transition: transform 0.12s ease, background 0.15s ease, box-shadow 0.15s ease;
}
.primary-btn:hover:not(:disabled) { background: var(--amber-hi); transform: translateY(-1px); }
.primary-btn:active:not(:disabled) { transform: translateY(0); }
.primary-btn:disabled { background: var(--ink-3); color: var(--paper-dim); box-shadow: none; }

/* result */
.round-points { font-family: var(--font-display); font-weight: 700; font-size: 1.9rem; line-height: 1; }
.res-detail { font-size: 0.88rem; color: var(--paper-dim); display: flex; align-items: center; gap: 0.4rem; }
.res-detail b { color: var(--paper); }
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.dot-loc { background: var(--safelight); }
.dot-time { background: var(--amber); }
.meter { height: 6px; border-radius: 999px; background: var(--ink-3); overflow: hidden; }
.meter span {
  display: block; height: 100%; width: 0;
  background: linear-gradient(90deg, var(--safelight), var(--amber));
  transition: width 0.7s cubic-bezier(.2, .8, .2, 1);
}
.res-desc { margin-top: 0.5rem; font-size: 0.9rem; color: var(--paper); max-width: 70ch; }
.res-credit { display: inline-block; margin-top: 0.25rem; font-size: 0.78rem; color: var(--paper-dim); text-decoration: underline; text-underline-offset: 2px; }
.res-credit:hover { color: var(--amber); }

/* ---------------------------------------------------------------- overlays */
.overlay {
  position: fixed; inset: 0; z-index: 1000;
  display: grid; place-items: center;
  padding: 16px;
  background: rgba(10, 8, 7, 0.78);
  backdrop-filter: blur(6px);
  overflow-y: auto;
}
.card {
  width: 100%;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 1.75rem;
  text-align: center;
}
.card-title { font-family: var(--font-display); font-weight: 700; font-size: 2.2rem; line-height: 1.1; letter-spacing: -0.02em; }
.card-lede { margin-top: 0.6rem; color: var(--paper-dim); }
.how {
  counter-reset: step; text-align: left;
  margin: 1.2rem 0 0.9rem; display: grid; gap: 0.55rem;
}
.how li {
  counter-increment: step;
  display: flex; gap: 0.7rem; align-items: baseline;
  padding: 0.6rem 0.8rem; border-radius: 10px; background: var(--ink-3);
}
.how li::before {
  content: counter(step);
  font-family: var(--font-display); font-weight: 700; color: var(--amber);
}

.summary { width: 100%; margin-top: 1.1rem; border-collapse: collapse; font-size: 0.88rem; text-align: left; }
.summary th {
  font-size: 0.65rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--paper-dim);
  font-weight: 600; padding: 0 0.5rem 0.5rem; border-bottom: 1px solid var(--line);
}
.summary td { padding: 0.55rem 0.5rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.summary .num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
.summary td.num b { font-family: var(--font-display); }
.summary .desc { color: var(--paper-dim); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* ===================================================================== MENU */
.menu {
  position: fixed; inset: 0; z-index: 900;
  display: flex; flex-direction: column;
  background: var(--ink);
  overflow-y: auto;
}
.menu[hidden] { display: none !important; }
.menu-map { position: absolute; inset: 0; z-index: 0; background: var(--ink); }
.menu-map .leaflet-tile-pane { filter: grayscale(1) invert(1) sepia(0.35) brightness(0.42) contrast(1.1); }
.menu-map .leaflet-control-attribution { background: rgba(20, 17, 15, 0.7); color: var(--paper-dim); }
.menu-map .leaflet-control-attribution a { color: var(--paper-dim); }
.menu-shade {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(ellipse at center, rgba(20, 17, 15, 0.15) 0%, rgba(20, 17, 15, 0.75) 80%),
    linear-gradient(to bottom, rgba(20, 17, 15, 0.6), transparent 25%, transparent 75%, rgba(20, 17, 15, 0.8));
}
.menu-top, .menu-main, .menu-foot { position: relative; z-index: 2; }
.menu-top {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 18px clamp(16px, 4vw, 40px);
}
.menu-brand { display: flex; align-items: center; gap: 12px; }
.menu-brand .brand-mark-lg { margin: 0; }
.menu-title {
  font-family: var(--font-display); font-weight: 700; letter-spacing: -0.02em;
  font-size: clamp(1.35rem, 3.2vw, 2.1rem); line-height: 1.05;
}
.menu-title em { font-style: italic; font-weight: 500; color: var(--amber); }

.menu-main {
  flex: 1; display: flex; flex-direction: column; justify-content: center;
  width: 100%; max-width: 1240px; margin: 0 auto;
  padding: 8px clamp(16px, 4vw, 40px) 24px;
}
.menu-tagline {
  font-family: var(--font-display); font-style: italic;
  font-size: clamp(1.05rem, 2.2vw, 1.4rem); color: var(--paper-dim);
  margin-bottom: 18px; text-align: center;
}

.mode-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(12px, 1.8vw, 22px); }
@media (max-width: 820px) { .mode-grid { grid-template-columns: 1fr; } }

.mode-card {
  position: relative; overflow: hidden;
  aspect-ratio: 16 / 10;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, var(--ink-3), var(--ink-2));
  color: var(--paper); text-align: left;
  padding: 0;
  box-shadow: var(--shadow);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
@media (max-width: 820px) { .mode-card { aspect-ratio: auto; height: clamp(130px, 22vh, 190px); } }
.mode-card:hover:not(:disabled), .mode-card:focus-visible { transform: translateY(-3px); border-color: rgba(231, 163, 62, 0.6); }
.mode-card:disabled { cursor: progress; opacity: 0.7; }
.mode-img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: 0; filter: saturate(0.85);
  transition: opacity 0.5s ease, transform 0.6s ease;
}
.mode-img.is-loaded { opacity: 1; }
.mode-card:hover .mode-img { transform: scale(1.04); }
.mode-card::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(14, 12, 10, 0.92) 0%, rgba(14, 12, 10, 0.35) 45%, rgba(14, 12, 10, 0.05) 70%);
}
.mode-text {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 1;
  display: flex; flex-direction: column; gap: 2px;
  padding: clamp(14px, 2vw, 22px);
}
.mode-name { font-family: var(--font-display); font-weight: 700; font-size: clamp(1.6rem, 2.6vw, 2.2rem); line-height: 1; }
.mode-desc { font-size: 0.92rem; color: rgba(242, 234, 217, 0.85); }
.mode-badge {
  position: absolute; top: 12px; right: 12px; z-index: 1;
  font-size: 0.75rem; font-weight: 700;
  padding: 4px 10px; border-radius: 999px;
  background: var(--amber); color: var(--ink);
}

.era-picker { max-width: 760px; width: 100%; margin: 0 auto; }
.era-head { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.era-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; }
.era-btn {
  display: flex; justify-content: space-between; align-items: baseline; gap: 8px;
  padding: 16px 18px; border-radius: 14px;
  background: rgba(29, 25, 22, 0.88); color: var(--paper);
  border: 1px solid var(--line);
  backdrop-filter: blur(6px);
  text-align: left;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.era-btn:hover:not(:disabled) { border-color: rgba(231, 163, 62, 0.6); transform: translateY(-2px); }
.era-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.era-years { font-family: var(--font-display); font-weight: 700; font-size: 1.3rem; }
.era-count { font-size: 0.78rem; color: var(--paper-dim); white-space: nowrap; }

.menu-status { min-height: 1.4em; margin-top: 14px; text-align: center; color: var(--paper-dim); font-size: 0.92rem; }
.menu-foot {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 16px;
  padding: 12px clamp(16px, 4vw, 40px) max(30px, env(safe-area-inset-bottom)); /* room for the map attribution */
  font-size: 0.8rem; color: var(--paper-dim);
}
.menu-foot a { color: var(--paper); }

.ghost-btn {
  padding: 0.55rem 1rem; border-radius: 999px;
  background: rgba(29, 25, 22, 0.8); color: var(--paper);
  border: 1px solid var(--line); font-weight: 600; font-size: 0.88rem;
  backdrop-filter: blur(6px); white-space: nowrap;
}
.ghost-btn:hover { border-color: rgba(231, 163, 62, 0.6); }
.secondary-btn {
  padding: 0.8rem 1.5rem; border-radius: 12px;
  background: transparent; color: var(--paper);
  border: 1px solid var(--line); font-weight: 600;
}
.secondary-btn:hover { background: var(--ink-3); }

.mode-label {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 999px;
  border: 1px solid rgba(231, 163, 62, 0.45); color: var(--amber);
  white-space: nowrap;
}
@media (max-width: 520px) { .mode-label { display: none; } }

/* Link back to the games hub (index.html) from the game menu */
.menu-actions { display: flex; align-items: center; gap: 8px; }
a.ghost-btn { text-decoration: none; display: inline-flex; align-items: center; }
@media (max-width: 560px) {
  .menu-top { flex-wrap: wrap; row-gap: 12px; }
  .menu-brand { flex: 1 1 100%; }
  .menu-actions { flex: 1 1 100%; }
  .menu-actions .ghost-btn { flex: 1; justify-content: center; text-align: center; }
}