:root {
  color-scheme: dark;
  --ink: #f4f5ef;
  --muted: #969b8e;
  --surface: #171915;
  --line: #30342c;
  --accent: #c8ff62;
  --danger: #ff8d7f;
  --page: #10110f;
  font-family: "Avenir Next", Avenir, "Segoe UI", sans-serif;
  background: var(--page);
  color: var(--ink);
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--page); }
body {
  min-height: 100svh;
  margin: 0;
  padding:
    max(22px, env(safe-area-inset-top))
    max(22px, env(safe-area-inset-right))
    max(22px, env(safe-area-inset-bottom))
    max(22px, env(safe-area-inset-left));
  background:
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px),
    var(--page);
  background-size: 44px 44px;
}

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

.login-shell {
  min-height: calc(100svh - max(44px, env(safe-area-inset-top) + env(safe-area-inset-bottom)));
  display: grid;
  place-items: center;
}

.login-panel {
  position: relative;
  width: min(100%, 430px);
  padding: clamp(26px, 7vw, 38px);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: 0 28px 80px rgba(0,0,0,.3);
}

.login-panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  border-radius: 20px 20px 0 0;
  background: var(--accent);
}

.brand {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  font-weight: 750;
  letter-spacing: .13em;
}

.brand-mark {
  width: 18px;
  height: 18px;
  border: 5px solid var(--accent);
  border-radius: 5px;
  transform: rotate(8deg);
}

.panel-heading { margin: 34px 0 32px; }
h1 { margin: 0; font-size: clamp(36px, 11vw, 48px); line-height: 1; letter-spacing: -.05em; }
.panel-heading p { margin: 12px 0 0; color: var(--muted); font-size: 14px; line-height: 1.5; }

form label {
  display: block;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 650;
}

.password-field { position: relative; }
input {
  width: 100%;
  min-height: 56px;
  padding: 14px 104px 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  outline: none;
  background: var(--page);
  color: var(--ink);
  font-size: 18px;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(200,255,98,.12); }
input[aria-invalid="true"] { border-color: var(--danger); }

.reveal-button {
  position: absolute;
  top: 6px;
  right: 6px;
  min-height: 44px;
  padding: 0 12px;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
}
.reveal-button:hover { color: var(--ink); }

.form-status {
  min-height: 20px;
  margin: 10px 0;
  color: var(--danger);
  font-size: 12px;
  line-height: 1.45;
}

.submit-button {
  width: 100%;
  min-height: 54px;
  padding: 0 17px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 0;
  border-radius: 12px;
  background: var(--accent);
  color: #15180f;
  cursor: pointer;
  font-weight: 750;
  transition: transform 140ms ease, filter 140ms ease;
}
.submit-button:hover { filter: brightness(1.05); }
.submit-button:active { transform: translateY(1px); }
.submit-button:disabled { cursor: wait; filter: saturate(.35); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

@media (max-width: 520px) {
  body { padding-inline: 16px; background-size: 36px 36px; }
  .login-panel { padding: 26px 22px 24px; }
  .panel-heading { margin-block: 28px 28px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: .01ms !important; }
}