:root {
  --bg: #f5f5f2;
  --surface: #ffffff;
  --ink: #141b19;
  --muted: #69746f;
  --line: #e4e2dc;
  --line-strong: #d3d0c8;
  --accent: #2f6a54;
  --accent-deep: #14211d;
  --brass: #a8894f;
  --brass-soft: rgba(168, 137, 79, 0.42);
  --danger: #a7523d;
  --grid-line: rgba(20, 27, 25, 0.035);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --t-fast: 150ms;
  color-scheme: light;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    var(--bg);
  background-size: 96px 96px, 96px 96px, auto;
  overflow-x: hidden;
  font-variant-numeric: tabular-nums;
}
.login-shell {
  width: min(920px, 100%);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.82fr);
  gap: 18px;
  align-items: stretch;
}
.intro, .card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 1px 2px rgba(36, 48, 42, 0.05), 0 18px 50px rgba(20, 33, 29, 0.06);
}
.intro {
  min-height: 390px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(28px, 5vw, 48px);
  border-color: var(--accent-deep);
  background:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    var(--accent-deep);
  background-size: 72px 72px, 72px 72px, auto;
  color: #ffffff;
}
.intro::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  pointer-events: none;
}
.intro::after {
  content: "";
  position: absolute;
  left: 28px;
  right: 28px;
  bottom: 26px;
  height: 10px;
  background: repeating-linear-gradient(90deg, rgba(255,255,255,0.32) 0 1px, transparent 1px 8px);
  opacity: 0.5;
}
.card {
  border-top: 3px solid var(--accent);
  box-shadow: 0 1px 2px rgba(36, 48, 42, 0.05), 0 0 0 1px rgba(168, 137, 79, 0.14);
}
.card::before {
  content: "";
  position: absolute;
  left: 30px;
  right: 30px;
  top: 3px;
  height: 1px;
  background: var(--brass-soft);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: auto;
  font-weight: 800;
  color: #ffffff;
}
.brand-mark {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background: #6bb18d;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.35), 0 0 0 1px rgba(168, 137, 79, 0.28);
}
.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.intro .eyebrow {
  color: #9bd0b5;
}
.intro p {
  color: rgba(255, 255, 255, 0.74);
}
h1 {
  margin: 0 0 14px;
  font-size: clamp(28px, 5vw, 48px);
  line-height: 1.08;
  letter-spacing: 0;
}
p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.card {
  padding: 30px;
}
h2 {
  margin: 0 0 18px;
  font-size: 24px;
}
form {
  display: grid;
  gap: 14px;
}
label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 750;
}
input {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-bottom-color: rgba(47, 106, 84, 0.36);
  border-radius: 8px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.84);
  color: var(--ink);
  font: inherit;
  transition: border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
input:focus, button:focus-visible, a:focus-visible {
  outline: 3px solid rgba(47, 106, 84, 0.22);
  outline-offset: 3px;
}
button {
  min-height: 48px;
  border: 0;
  border-radius: 8px;
  color: white;
  background: var(--accent);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  transition: transform var(--t-fast) var(--ease), background var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
button::after {
  content: ">";
  margin-left: 9px;
  transform: translateX(-2px);
  transition: transform var(--t-fast) var(--ease);
}
button:hover {
  background: #245843;
  box-shadow: 0 0 0 1px var(--brass-soft);
}
button:hover::after {
  transform: translateX(2px);
}
button:active {
  transform: translateY(1px);
}
.links {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
}
a { color: var(--accent); }
.links a {
  text-decoration: none;
  background-image: linear-gradient(currentColor, currentColor);
  background-position: 0 100%;
  background-repeat: no-repeat;
  background-size: 0 1px;
  transition: background-size var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.links a:hover {
  background-size: 100% 1px;
}
.error {
  margin-bottom: 14px;
  padding: 11px 12px;
  border: 1px solid rgba(179, 90, 67, 0.28);
  border-radius: 8px;
  color: var(--danger);
  background: rgba(179, 90, 67, 0.08);
}
.notice {
  margin-bottom: 14px;
  padding: 11px 12px;
  border: 1px solid rgba(47, 106, 84, 0.28);
  border-radius: 2px;
  color: var(--accent);
  background: rgba(47, 106, 84, 0.08);
  font-size: 12px;
}
@media (max-width: 760px) {
  body { place-items: stretch; padding: 14px; }
  .login-shell { grid-template-columns: 1fr; }
  .intro { min-height: 260px; }
  .card { padding: 22px; }
}

/* A / Mineral Ledger login gate */
body {
  background:
    linear-gradient(90deg, rgba(244, 244, 239, 0.08), rgba(244, 244, 239, 0.28)),
    url("/site-assets/mineral-study-background.png") center / cover no-repeat;
  display: block;
  overflow: hidden;
  padding: 0;
  position: relative;
}
body::before,
body::after {
  content: "";
  pointer-events: none;
  position: absolute;
  z-index: 2;
}
body::before {
  border: solid rgba(20, 33, 29, 0.42);
  border-width: 1px 0;
  inset: 24px 32px;
}
body::after {
  border: solid rgba(20, 33, 29, 0.42);
  border-width: 0 1px;
  inset: 24px 32px;
}
.login-shell {
  display: block;
  min-height: 100vh;
  width: 100%;
}
.intro,
.card {
  border-radius: 6px;
  box-shadow: none;
  overflow: visible;
  position: absolute;
  z-index: 3;
}
.intro {
  background: transparent;
  border: 0;
  color: var(--ink);
  display: block;
  left: clamp(64px, 8vw, 128px);
  min-height: 0;
  padding: 0;
  top: 50%;
  transform: translateY(-54%);
  width: min(620px, 46vw);
}
.intro::before,
.intro::after { display: none; }
.brand {
  color: var(--ink);
  font-size: 13px;
  letter-spacing: 0.18em;
  margin: 0 0 40px;
  position: static;
  width: fit-content;
}
.brand-mark { display: none; }
.intro .eyebrow {
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  margin: 0 0 22px;
}
.intro h1 {
  font-family: "Songti SC", "Noto Serif CJK SC", serif;
  font-size: clamp(48px, 5.2vw, 78px);
  font-weight: 500;
  line-height: 1.08;
  margin: 0 0 28px;
}
.intro p:last-child {
  color: #3f4d47;
  font-size: 16px;
  line-height: 1.85;
}
.card {
  backdrop-filter: blur(14px);
  background: rgba(250, 250, 246, 0.93);
  border: 1px solid rgba(20, 33, 29, 0.28);
  padding: 34px 36px 30px;
  right: clamp(64px, 7vw, 112px);
  top: 50%;
  transform: translateY(-48%);
  width: min(390px, calc(100vw - 48px));
}
.card::before {
  background: var(--accent);
  height: 1px;
  left: -38px;
  right: auto;
  top: 54px;
  width: 38px;
}
.card h2 {
  border-bottom: 1px solid rgba(20, 33, 29, 0.18);
  font-size: 22px;
  margin-bottom: 26px;
  padding-bottom: 20px;
  text-align: right;
}
.card h2::before {
  color: var(--muted);
  content: "PRIVATE ACCESS";
  float: left;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.1em;
  padding-top: 8px;
}
form { gap: 18px; }
label {
  font-size: 12px;
  font-weight: 400;
}
input {
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(20, 33, 29, 0.42);
  border-radius: 0;
  height: 45px;
  padding: 0;
}
input:focus {
  border-bottom-color: var(--accent);
  outline: 0;
}
button {
  background: var(--ink);
  border-radius: 2px;
  justify-self: end;
  margin-top: 8px;
  padding: 0 18px;
  width: 150px;
}
.links {
  align-items: center;
  margin-top: 14px;
}
.links a {
  align-items: center;
  display: inline-flex;
  min-height: 44px;
}
.error {
  border-radius: 2px;
  font-size: 12px;
}
@media (max-width: 1100px) and (min-width: 821px) {
  .intro {
    left: 56px;
    width: min(430px, 44vw);
  }
  .card {
    right: 48px;
    width: min(360px, calc(100vw - 48px));
  }
}
@media (max-width: 820px) {
  body {
    min-height: 844px;
    overflow-y: auto;
  }
  body::before { inset: 14px 20px; }
  body::after { inset: 14px 20px; }
  .intro {
    left: 40px;
    right: 40px;
    top: 138px;
    transform: none;
    width: auto;
  }
  .brand {
    margin-bottom: 24px;
    position: static;
  }
  .intro .eyebrow { margin-bottom: 14px; }
  .intro h1 { font-size: 38px; margin-bottom: 14px; }
  .intro p:last-child { font-size: 13px; line-height: 1.65; }
  .card {
    bottom: 70px;
    left: 40px;
    padding: 24px;
    right: 40px;
    top: auto;
    transform: none;
    width: auto;
  }
  .card::before { display: none; }
  .card h2 { margin-bottom: 18px; padding-bottom: 14px; }
  input { height: 42px; }
}
@media (max-width: 420px) {
  .intro,
  .card { left: 32px; right: 32px; }
  .intro { top: 116px; }
  .intro h1 { font-size: 34px; }
  .card { bottom: 42px; }
  .links { font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
  }
}

.public-filing {
  bottom: 10px;
  color: rgba(20, 33, 29, 0.66);
  font-size: 11px;
  left: 50%;
  position: fixed;
  transform: translateX(-50%);
  z-index: 4;
}
.public-filing a {
  align-items: center;
  display: inline-flex;
  min-height: 44px;
  text-decoration: none;
}
@media (max-width: 820px) {
  .public-filing { bottom: 0; }
}
@media (max-width: 420px) {
  .card { bottom: 54px; }
}