:root {
  --text: #f1f1f4;
  --muted: rgba(241, 241, 244, 0.62);
  --faint: rgba(241, 241, 244, 0.58); /* at least 4.5:1 on the dark glass (WCAG AA) */
  --line: rgba(255, 255, 255, 0.22);
  --glass: rgba(28, 28, 34, 0.42);
  --glass-hi: rgba(255, 255, 255, 0.07);
  --edge: rgba(255, 255, 255, 0.16);
  --accent: #9b74e6;
  --danger: #ff7b7b;
  --ok: #6ee7a0;
  /* The divider between the panes runs from 48% (top) to 54% (bottom) of the card width. */
  --slide: cubic-bezier(0.65, 0, 0.35, 1);
  color-scheme: dark;
}

* { box-sizing: border-box; }

/* Layout rules like display:grid would otherwise override the hidden attribute. */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  min-height: 100%;
  color: var(--text);
  font: 14px/1.5 "Segoe UI Variable Text", "Segoe UI", system-ui, sans-serif;
  background: #050506 url("background.jpg") center / cover no-repeat fixed;
}

.sprites { position: absolute; width: 0; height: 0; overflow: hidden; }

.stage {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 22px;
  padding: 32px 16px;
}

.brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 600; letter-spacing: 0.4px; }
.brand img { border-radius: 8px; }

/* ---- glass card ---------------------------------------------------------- */

.card {
  position: relative;
  width: 100%;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.02) 45%, rgba(255, 255, 255, 0.05)), var(--glass);
  border: 1px solid var(--edge);
  border-radius: 18px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(22px) saturate(115%);
  overflow: hidden;
}

.split { max-width: 880px; min-height: 480px; display: grid; grid-template-columns: 1fr 1fr; }
.solo { max-width: 440px; padding: 40px 44px; }

.pane { display: flex; align-items: center; padding: 44px 56px; transition: opacity 0.4s var(--slide); }
.pane-right { padding-left: 76px; }
.split[data-mode="login"] .pane-right,
.split[data-mode="signup"] .pane-left { opacity: 0; }

.form-wrap { width: 100%; }

h2 { margin: 0 0 22px; font-size: 24px; font-weight: 600; }
.lead { color: var(--muted); margin: -10px 0 20px; }
.hint { color: var(--faint); font-size: 12px; margin: 0; }
code { background: rgba(255, 255, 255, 0.08); padding: 1px 5px; border-radius: 4px; }

/* ---- fields ---------------------------------------------------------------- */

form { display: flex; flex-direction: column; gap: 16px; }

.field {
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding: 6px 2px;
  transition: border-color 0.2s;
}
.field:focus-within { border-color: rgba(255, 255, 255, 0.7); }

.field input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 0;
  outline: 0;
  color: var(--text);
  font: inherit;
  padding: 4px 0;
}
.field input::placeholder { color: var(--faint); }
.field input.code { letter-spacing: 6px; font-variant-numeric: tabular-nums; }
.field input.code::placeholder { letter-spacing: normal; }

.ico { width: 17px; height: 17px; flex: none; fill: none; stroke: var(--muted); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.ico.sm { width: 14px; height: 14px; stroke: currentColor; }

.eye { background: none; border: 0; padding: 2px; cursor: pointer; display: flex; border-radius: 4px; }
.eye:hover .ico, .eye:focus-visible .ico { stroke: var(--text); }

/* ---- buttons --------------------------------------------------------------- */

button { font: inherit; color: inherit; }

.pill {
  margin-top: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.03));
  color: var(--text);
  font-weight: 600;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15), 0 4px 14px rgba(0, 0, 0, 0.35);
  transition: background 0.2s, border-color 0.2s, transform 0.1s;
}
.pill:hover:not(:disabled) { background: linear-gradient(180deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.06)); border-color: rgba(255, 255, 255, 0.65); }
.pill:active:not(:disabled) { transform: translateY(1px); }
.pill:disabled { opacity: 0.5; cursor: default; }
.pill.ghost { align-self: flex-start; padding: 8px 18px; font-size: 13px; }
form .pill { width: 100%; }
#view-home .pill { padding: 10px 28px; }

.link { background: none; border: 0; padding: 0; color: var(--text); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
.link:hover:not(:disabled) { color: #fff; }
.link:disabled { color: var(--faint); text-decoration: none; cursor: default; }

.switch { margin: 18px 0 0; font-size: 12.5px; color: var(--muted); text-align: center; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.field input:focus-visible { outline: 0; }

/* ---- messages -------------------------------------------------------------- */

.error { color: var(--danger); margin: 0; font-size: 12.5px; }
.notice { color: var(--ok); margin: 0; font-size: 12.5px; }
.error:empty, .notice:empty { display: none; }

/* Only unmet password rules are listed, as errors. */
.rules { list-style: none; margin: -8px 0 0; padding: 0; font-size: 12px; color: var(--danger); display: grid; gap: 1px; }
.rules li::before { content: "✕"; display: inline-block; width: 16px; }

.name-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

/* ---- recovery code, account settings ------------------------------------------ */

.recovery-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 0 0 20px;
  padding: 14px 16px;
  border: 1px solid rgba(155, 116, 230, 0.55);
  border-radius: 12px;
  background: rgba(155, 116, 230, 0.12);
}
.recovery-box code { background: none; padding: 0; font-size: 15px; letter-spacing: 1px; font-variant-numeric: tabular-nums; user-select: all; word-break: break-all; }

.check { display: flex; align-items: flex-start; gap: 10px; font-size: 13px; color: var(--muted); cursor: pointer; }
.check input { margin: 2px 0 0; accent-color: var(--accent); }

.field select { flex: 1; min-width: 0; background: transparent; border: 0; outline: 0; color: var(--text); font: inherit; padding: 4px 0; cursor: pointer; }
.field select option { background: #1b1b22; color: var(--text); }

#solo-card:has(#view-account:not([hidden])) { max-width: 520px; max-height: calc(100vh - 140px); overflow-y: auto; }
.group { border-top: 1px solid var(--line); padding: 14px 0; }
.group summary { cursor: pointer; font-weight: 600; list-style-position: outside; }
.group[open] summary { margin-bottom: 14px; }
.group.danger summary { color: var(--danger); }
.pill.danger { border-color: rgba(255, 123, 123, 0.6); color: var(--danger); }
.pill.danger:hover:not(:disabled) { border-color: var(--danger); }

/* ---- sliding glass panel ----------------------------------------------------- */

.overlay {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 54%;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.11), rgba(255, 255, 255, 0.03) 50%, rgba(255, 255, 255, 0.07)), rgba(40, 40, 48, 0.55);
  backdrop-filter: blur(26px) saturate(120%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
  transition: transform 0.7s var(--slide), clip-path 0.7s var(--slide);
  z-index: 2;
}
/* Covering the right pane: slanted left edge. 85.19% = 46/54 of its own width. */
.split[data-mode="login"] .overlay {
  transform: translateX(85.19%);
  clip-path: polygon(3.7% 0, 100% 0, 100% 100%, 14.8% 100%);
}
/* Covering the left pane: slanted right edge on the same line. */
.split[data-mode="signup"] .overlay {
  transform: translateX(0);
  clip-path: polygon(0 0, 88.9% 0, 100% 100%, 0 100%);
}

.overlay-panel {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 260px;
  transition: opacity 0.35s ease;
}
.overlay-panel h3 { margin: 0; font-size: 34px; line-height: 1.08; font-weight: 800; text-transform: uppercase; letter-spacing: 0.5px; }
.overlay-panel p { margin: 0; color: var(--muted); }
.overlay-login { left: 26%; }
.overlay-signup { left: 13%; }
.split[data-mode="login"] .overlay-signup,
.split[data-mode="signup"] .overlay-login { opacity: 0; pointer-events: none; }

.footer { color: var(--faint); font-size: 12px; margin: 0; }

/* ---- narrow windows: one pane at a time, no sliding panel ---------------------- */

@media (max-width: 760px) {
  .split { grid-template-columns: 1fr; min-height: 0; max-width: 440px; }
  .overlay { display: none; }
  .pane, .pane-right { padding: 36px 32px; }
  .split[data-mode="login"] .pane-right,
  .split[data-mode="signup"] .pane-left { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .overlay, .overlay-panel, .pane { transition: none; }
}

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.15); border-radius: 5px; }