:root {
  --bg: #f3f5f9;
  --card: #fff;
  --text: #18202e;
  --muted: #5d6879;
  --line: #cfd6e2;
  --accent: #2457d6;
  --accent-text: #fff;
  --err: #b3261e;
  --ok: #17744a;
  --disabled: #eef0f4;
  box-sizing: border-box;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10141c;
    --card: #1a202c;
    --text: #e8ecf4;
    --muted: #9aa5b8;
    --line: #344055;
    --accent: #6c93ff;
    --accent-text: #0b1020;
    --err: #ff8a80;
    --ok: #6fdca4;
    --disabled: #222a38;
  }
}

*, *::before, *::after { box-sizing: inherit; }

[hidden] { display: none !important; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

/* Card */
.card {
  width: 100%;
  max-width: 420px;
  padding: 28px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
}

h1 { font-size: 1.4rem; text-align: center; }

.sub { margin: 0 0 22px; color: var(--muted); font-size: .95rem; }

/* Fields */
.field { position: relative; margin-bottom: 16px; }

label { display: block; margin-bottom: 6px; font-size: .9rem; font-weight: 600; }

input[type="text"],
input[type="password"],
.sel-btn {
  width: 100%;
  min-height: 46px;
  padding: 11px 12px;
  font: inherit;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 9px;
}

input:disabled,
.sel-btn:disabled {
  background: var(--disabled);
  color: var(--muted);
  cursor: not-allowed;
}

input:focus-visible,
.sel-btn:focus-visible,
.btn:focus-visible,
.opt:focus-visible,
.link:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 1px;
}

.hint { margin: 6px 0 0; color: var(--muted); font-size: .85rem; }

.msg { min-height: 1.3em; margin: 6px 0 0; font-size: .88rem; }
.msg.err { color: var(--err); }
.msg.ok  { color: var(--ok); }

/* Custom select with logos */
.sel-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: left;
  cursor: pointer;
}
.sel-logo:empty { display: none; }
.sel-label.placeholder { color: var(--muted); }
.caret { margin-left: auto; color: var(--muted); }

.list {
  position: absolute;
  z-index: 5;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  max-height: 240px;
  margin: 0;
  padding: 4px;
  overflow: auto;
  list-style: none;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 9px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .18);
}

.opt {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: 7px;
  cursor: pointer;
}
.opt:hover,
.opt[aria-selected="true"] { background: var(--disabled); }

.opt:hover:not([aria-disabled="true"]),
.opt[aria-selected="true"] { background: var(--disabled); }

.opt[aria-disabled="true"] {
  color: var(--muted);
  opacity: .5;
  cursor: not-allowed;
}

/* Logos: swap these for <img> tags when you have real logos */
.logo {
  display: grid;
  place-items: center;
  flex: none;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  color: #fff;
  font-size: .8rem;
  font-weight: 700;
  overflow: hidden;
}

/* Buttons */
.btn {
  width: 100%;
  min-height: 48px;
  margin-top: 4px;
  font: inherit;
  font-weight: 600;
  color: var(--accent-text);
  background: var(--accent);
  border: 0;
  border-radius: 9px;
  cursor: pointer;
}

.link {
  margin-top: 8px;
  padding: 6px 0;
  font: inherit;
  color: var(--accent);
  background: none;
  border: 0;
  cursor: pointer;
}

/* Success state */
.done { padding: 10px 0; text-align: center; }
.tick {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  margin: 0 auto 12px;
  font-size: 1.6rem;
  color: var(--card);
  background: var(--ok);
  border-radius: 50%;
}