:root {
  --paper: #F7F5EF;
  --ink: #1C1A14;
  --stamp: #B5301C;
  --rule: #D8D3C6;
  --quiet: #6B675B;
  --card: #FDFCF8;
}

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

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 16px;
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 2px solid var(--stamp); outline-offset: 3px; }
.mono { font-family: 'Spline Sans Mono', monospace; }

/* ---------- Letterhead ---------- */
.letterhead {
  border-bottom: 2px solid var(--ink);
  padding: 0 clamp(16px, 4vw, 48px);
}
.letterhead-inner {
  max-width: 1160px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand svg { flex: none; }
.brand-name {
  font-family: 'Archivo', sans-serif;
  font-weight: 800;
  font-size: 19px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.1;
}
.brand-sub {
  font-family: 'Spline Sans Mono', monospace;
  font-size: 11px;
  color: var(--quiet);
  letter-spacing: 0.04em;
}
nav {
  display: flex;
  gap: clamp(14px, 2.5vw, 30px);
  align-items: center;
  font-family: 'Archivo', sans-serif;
  font-weight: 600;
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  flex-wrap: wrap;
}
nav a { padding: 4px 0; border-bottom: 2px solid transparent; }
nav a:hover { border-bottom-color: var(--stamp); }
nav .cred {
  font-family: 'Spline Sans Mono', monospace;
  font-size: 11.5px;
  text-transform: none;
  letter-spacing: 0;
  color: var(--quiet);
  border: 1px solid var(--rule);
  padding: 6px 12px;
  border-radius: 2px;
  background: transparent;
  cursor: pointer;
}
nav .cred:hover { border-color: var(--ink); color: var(--ink); }

/* ---------- Messages ---------- */
.messages { list-style: none; max-width: 1160px; margin: 0 auto; padding: 14px clamp(16px, 4vw, 48px) 0; }
.messages li {
  font-family: 'Spline Sans Mono', monospace;
  font-size: 12.5px;
  border: 1px solid var(--rule);
  background: var(--card);
  padding: 10px 16px;
  border-radius: 2px;
  margin-bottom: 8px;
}
.messages li.error { border-color: var(--stamp); color: var(--stamp); }

/* ---------- Title block ---------- */
.title-block { padding: 0 clamp(16px, 4vw, 48px); border-bottom: 1px solid var(--rule); }
.title-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 54px 0 40px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  flex-wrap: wrap;
}
h1 {
  font-family: 'Archivo', sans-serif;
  font-weight: 800;
  font-size: clamp(30px, 4.6vw, 52px);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1.05;
}
.title-sub { margin-top: 12px; font-style: italic; font-size: 17px; color: var(--quiet); max-width: 52ch; }
.survey-stats {
  font-family: 'Spline Sans Mono', monospace;
  font-size: 12px;
  color: var(--quiet);
  text-align: right;
  line-height: 1.9;
  white-space: nowrap;
}
.survey-stats b { color: var(--ink); font-weight: 700; }
.report-btn {
  display: inline-block;
  margin-top: 10px;
  font-family: 'Archivo', sans-serif;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--paper);
  padding: 12px 22px;
  border-radius: 2px;
  transition: background 0.15s ease;
}
.report-btn:hover { background: var(--stamp); }

/* ---------- Classification filters ---------- */
.filters { padding: 0 clamp(16px, 4vw, 48px); border-bottom: 1px solid var(--rule); background: var(--card); }
.filters-inner { max-width: 1160px; margin: 0 auto; padding: 16px 0; display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.filters-label { font-family: 'Spline Sans Mono', monospace; font-size: 11px; letter-spacing: 0.08em; color: var(--quiet); margin-right: 8px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: 'Spline Sans Mono', monospace;
  font-size: 12px;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink);
  padding: 6px 12px;
  border-radius: 2px;
  transition: border-color 0.15s ease;
}
.chip:hover { border-color: var(--ink); }
.chip.active { border-color: var(--ink); background: var(--ink); color: var(--paper); }

/* ---------- Specimen cards ---------- */
.registry { padding: 44px clamp(16px, 4vw, 48px) 72px; }
.registry-inner {
  max-width: 1160px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}
.empty-note { font-style: italic; color: var(--quiet); grid-column: 1 / -1; }
.specimen {
  background: var(--card);
  border: 1px solid var(--rule);
  color: var(--ink);
  border-radius: 2px;
  padding: 22px 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.specimen:hover { border-color: var(--ink); transform: translateY(-2px); }
.specimen::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(180deg, rgba(247, 245, 239, 0.45) 0%, rgba(247, 245, 239, 0.82) 55%, rgba(253, 252, 248, 0.95) 100%),
    var(--specimen-photo, none);
  background-size: cover;
  background-position: center;
  filter: grayscale(0.4) sepia(0.1) contrast(0.95);
}
.specimen > * { position: relative; z-index: 1; }
.specimen-top { display: flex; justify-content: space-between; align-items: flex-start; }
.specimen-code {
  font-family: 'Spline Sans Mono', monospace;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--stamp);
  border: 1.5px solid var(--stamp);
  padding: 3px 8px;
  border-radius: 2px;
}
.specimen h2 { font-family: 'Archivo', sans-serif; font-weight: 600; font-size: 20px; line-height: 1.25; }
.specimen .meta { font-family: 'Spline Sans Mono', monospace; font-size: 11.5px; color: var(--quiet); line-height: 1.9; }
.specimen .meta b { color: var(--ink); font-weight: 500; }
.specimen-bottom {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: 'Spline Sans Mono', monospace;
  font-size: 12px;
}
.score { font-weight: 700; font-size: 15px; }
.score span { font-weight: 400; font-size: 11px; color: var(--quiet); }
.obs-count { color: var(--quiet); }

footer { border-top: 2px solid var(--ink); padding: 26px clamp(16px, 4vw, 48px) 40px; }
.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-family: 'Spline Sans Mono', monospace;
  font-size: 11.5px;
  color: var(--quiet);
}

/* ---------- Specimen detail ---------- */
.report { max-width: 960px; margin: 0 auto; padding: 36px clamp(16px, 4vw, 48px) 80px; }
.crumb { font-family: 'Spline Sans Mono', monospace; font-size: 12px; color: var(--quiet); margin-bottom: 34px; }
.crumb a:hover { color: var(--ink); text-decoration: underline; }

.report-head {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  border: 1px solid var(--ink);
  background: var(--card);
  border-radius: 2px;
  padding: 30px 32px;
  position: relative;
  overflow: hidden;
  color: var(--ink);
}
.report-head::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(180deg, rgba(253, 252, 248, 0.5) 0%, rgba(253, 252, 248, 0.85) 60%, rgba(253, 252, 248, 0.96) 100%),
    var(--specimen-photo, none);
  background-size: cover;
  background-position: center;
  filter: grayscale(0.4) sepia(0.1) contrast(0.95);
}
.report-head > * { position: relative; z-index: 1; }
.report-head.has-photo { cursor: pointer; }
.report-head.has-photo:hover::before { filter: grayscale(0.2) sepia(0.1) contrast(1); }
.report-head.has-photo:focus-visible { outline: 2px solid var(--stamp); outline-offset: 3px; }
.view-photo-hint {
  display: inline-block;
  margin-top: 14px;
  font-family: 'Spline Sans Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--quiet);
}
.report-head.has-photo:hover .view-photo-hint { color: var(--ink); }
.report-icon { flex: none; }
.report-id { font-family: 'Spline Sans Mono', monospace; font-size: 12px; font-weight: 700; letter-spacing: 0.06em; color: var(--stamp); }
.report-head h1 { font-size: clamp(26px, 4vw, 40px); line-height: 1.1; margin: 6px 0 14px; text-transform: none; }
.report-meta { font-family: 'Spline Sans Mono', monospace; font-size: 12px; color: var(--quiet); line-height: 2; }
.report-meta b { color: var(--ink); font-weight: 500; }
.field-desc { margin-top: 14px; font-style: italic; font-size: 17px; }
.stamp {
  position: absolute;
  right: 26px;
  top: 26px;
  transform: rotate(7deg);
  font-family: 'Archivo', sans-serif;
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stamp);
  border: 3px double var(--stamp);
  border-radius: 3px;
  padding: 7px 14px;
  opacity: 0.85;
  text-align: center;
  line-height: 1.3;
}
.stamp small { display: block; font-family: 'Spline Sans Mono', monospace; font-weight: 400; font-size: 9.5px; letter-spacing: 0.08em; }

.composite { display: flex; gap: 26px; align-items: baseline; margin: 34px 0 8px; flex-wrap: wrap; }
.composite .big { font-family: 'Spline Sans Mono', monospace; font-weight: 700; font-size: 48px; line-height: 1; }
.composite .big span { font-size: 18px; font-weight: 400; color: var(--quiet); }
.composite .basis { font-family: 'Spline Sans Mono', monospace; font-size: 12px; color: var(--quiet); }

section { margin-top: 44px; }
.sec-label {
  font-family: 'Archivo', sans-serif;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 8px;
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.sec-label .note { font-family: 'Spline Sans Mono', monospace; font-weight: 400; font-size: 11px; letter-spacing: 0.04em; text-transform: none; color: var(--quiet); }
.reading {
  display: grid;
  grid-template-columns: 210px 1fr 52px;
  gap: 16px;
  align-items: center;
  padding: 9px 0;
  border-bottom: 1px solid var(--rule);
  font-family: 'Spline Sans Mono', monospace;
  font-size: 12px;
}
.reading .bar {
  height: 10px;
  background: repeating-linear-gradient(90deg, var(--rule) 0 1px, transparent 1px 10%);
  position: relative;
  border-radius: 1px;
}
.reading .fill { position: absolute; inset: 0 auto 0 0; background: var(--ink); border-radius: 1px; }
.reading .val { font-weight: 700; text-align: right; font-size: 14px; }

.obs { border: 1px solid var(--rule); background: var(--card); border-radius: 2px; padding: 20px 24px; margin-bottom: 14px; }
.obs-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; font-family: 'Spline Sans Mono', monospace; font-size: 12px; }
.obs-head .observer { font-weight: 700; font-size: 13px; }
.obs-head .date { color: var(--quiet); }
.obs-body { margin-top: 8px; font-style: italic; font-size: 16px; }
.obs-readings { margin-top: 12px; display: flex; gap: 14px; flex-wrap: wrap; font-family: 'Spline Sans Mono', monospace; font-size: 11px; color: var(--quiet); }
.obs-readings b { color: var(--ink); font-weight: 700; }

.log-cta {
  margin-top: 34px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  border-radius: 2px;
  padding: 28px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.log-cta p { font-style: italic; color: #CFCABB; }
.log-cta strong {
  display: block;
  font-family: 'Archivo', sans-serif;
  font-weight: 800;
  font-size: 18px;
  font-style: normal;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--paper);
  margin-bottom: 4px;
}
.log-cta a, .log-cta button {
  flex: none;
  font-family: 'Archivo', sans-serif;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--paper);
  color: var(--ink);
  padding: 13px 24px;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.log-cta a:hover, .log-cta button:hover { background: var(--stamp); color: var(--paper); }

/* ---------- Photo modal ---------- */
.photo-modal {
  border: none;
  padding: 0;
  background: transparent;
  width: min(94vw, 1040px);
  max-height: 92vh;
  /* the global `* { margin: 0 }` reset above kills the UA's built-in
     `margin: auto` centering trick for <dialog>; restore it explicitly */
  margin: auto;
}
.photo-modal::backdrop {
  background: rgba(28, 26, 20, 0.82);
  animation: photo-backdrop-in 0.35s ease forwards;
}
.photo-modal.closing::backdrop { animation: photo-backdrop-out 0.25s ease forwards; }
.photo-modal-inner {
  background: var(--card);
  border: 1px solid var(--ink);
  border-radius: 2px;
  padding: 20px;
  max-height: calc(92vh - 40px);
  overflow: auto;
}
.photo-modal-inner img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 76vh;
  object-fit: contain;
  margin: 0 auto;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: var(--paper);
}

/* ---------- "Opening through a hole" reveal ---------- */
.photo-modal[open] {
  animation: hole-open 0.5s cubic-bezier(0.2, 0.7, 0.2, 1) forwards;
}
.photo-modal.closing {
  animation: hole-close 0.28s cubic-bezier(0.4, 0, 1, 1) forwards;
}
@keyframes hole-open {
  0% { clip-path: circle(0% at 50% 50%); opacity: 0; transform: scale(0.9); }
  60% { opacity: 1; }
  100% { clip-path: circle(75% at 50% 50%); opacity: 1; transform: scale(1); }
}
@keyframes hole-close {
  0% { clip-path: circle(75% at 50% 50%); opacity: 1; transform: scale(1); }
  100% { clip-path: circle(0% at 50% 50%); opacity: 0; transform: scale(0.9); }
}
@keyframes photo-backdrop-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes photo-backdrop-out {
  from { opacity: 1; }
  to { opacity: 0; }
}
.photo-modal-caption {
  margin-top: 12px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  font-family: 'Spline Sans Mono', monospace;
  font-size: 11.5px;
  color: var(--quiet);
}
.photo-modal-caption a { text-decoration: underline; }
.photo-modal-caption a:hover { color: var(--ink); }
.photo-modal-close {
  flex: none;
  font-family: 'Archivo', sans-serif;
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--paper);
  border: none;
  border-radius: 2px;
  padding: 7px 12px;
  cursor: pointer;
  transition: background 0.15s ease;
}
.photo-modal-close:hover { background: var(--stamp); }

/* ---------- Observation form ---------- */
.observe-form { display: flex; flex-direction: column; gap: 14px; }
.observe-form .field-row { display: flex; flex-direction: column; gap: 4px; }
.observe-form label {
  font-family: 'Spline Sans Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--quiet);
}
.observe-form input[type="text"],
.observe-form input[type="number"],
.auth-page input[type="text"],
.auth-page input[type="password"],
.auth-page input[type="email"] {
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 15px;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink);
  padding: 10px 12px;
  border-radius: 2px;
}
.observe-form .ratings-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }
.auth-page .field-row { display: flex; flex-direction: column; gap: 4px; margin-bottom: 14px; }
.auth-page label { font-family: 'Spline Sans Mono', monospace; font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--quiet); }
.observe-form button {
  align-self: flex-start;
  font-family: 'Archivo', sans-serif;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--paper);
  padding: 12px 22px;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.15s ease;
}
.observe-form button:hover { background: var(--stamp); }
.observe-form .errorlist { list-style: none; color: var(--stamp); font-family: 'Spline Sans Mono', monospace; font-size: 11px; }

/* ---------- Auth pages ---------- */
.auth-page { max-width: 440px; margin: 0 auto; padding: 60px clamp(16px, 4vw, 48px) 100px; }
.auth-page h1 { font-size: clamp(24px, 4vw, 32px); margin-bottom: 24px; text-transform: none; }
.auth-page form { display: flex; flex-direction: column; gap: 14px; }
.auth-page .helptext { font-family: 'Spline Sans Mono', monospace; font-size: 11px; color: var(--quiet); }
.auth-page p.switch { margin-top: 20px; font-family: 'Spline Sans Mono', monospace; font-size: 12.5px; color: var(--quiet); }
.auth-page p.switch a { text-decoration: underline; }

@media (max-width: 680px) {
  .report-head { flex-direction: column; gap: 16px; padding: 24px; }
  .stamp { position: static; transform: rotate(-3deg); width: max-content; margin-top: 4px; }
  .reading { grid-template-columns: 1fr 60px; grid-template-rows: auto auto; }
  .reading .bar { grid-column: 1 / -1; grid-row: 2; }
}