:root {
  --ink: #1a2228;
  --muted: #5a6870;
  --paper: #f2efe8;
  --line: #d4cfc4;
  --accent: #0d6e6e;
  --accent-deep: #0a5555;
  --danger: #9b2c2c;
  --badge: #e8f2f2;
  --font-display: "Syne", sans-serif;
  --font-body: "IBM Plex Sans JP", sans-serif;
}

* { box-sizing: border-box; }

/* Author display rules must not override the hidden attribute. */
[hidden] {
  display: none !important;
}

html, body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 10% 0%, rgba(13, 110, 110, 0.12), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(26, 34, 40, 0.08), transparent 50%),
    linear-gradient(160deg, #ebe6dc 0%, #f5f2eb 45%, #e4eceb 100%);
}

.gate {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem 1.25rem;
}

.login {
  width: min(100%, 22rem);
  animation: rise 0.45s ease-out;
}

.brand, .mark {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.06em;
  font-size: 1.75rem;
  color: var(--accent-deep);
}

.login h1, .home h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.35rem;
  margin: 0.35rem 0 0.5rem;
}

.lede {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
  margin: 0 0 1.5rem;
}

label {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 1rem;
  font-size: 0.8rem;
  color: var(--muted);
}

input, select {
  font: inherit;
  color: var(--ink);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  padding: 0.65rem 0.75rem;
  border-radius: 2px;
}

input:focus, select:focus {
  outline: 2px solid rgba(13, 110, 110, 0.35);
  outline-offset: 1px;
}

button {
  font: inherit;
  font-weight: 500;
  cursor: pointer;
  border: none;
  background: var(--accent);
  color: #fff;
  padding: 0.7rem 1rem;
  width: 100%;
  border-radius: 2px;
  transition: background 0.15s ease, transform 0.15s ease;
}

button:hover { background: var(--accent-deep); }
button:active { transform: translateY(1px); }

button.ghost {
  width: auto;
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 0.4rem 0.7rem;
  font-size: 0.8rem;
}

button.ghost:hover {
  background: rgba(255, 255, 255, 0.5);
  color: var(--ink);
}

.error {
  color: var(--danger);
  font-size: 0.85rem;
  margin: 0 0 0.75rem;
}

.shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  animation: rise 0.35s ease-out;
}

.top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.25rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(8px);
}

.top-brand {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.product {
  font-size: 0.85rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.top-user {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 0.85rem;
  font-size: 0.85rem;
}

.role-switch {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  font-size: 0.8rem;
}

.role-switch select {
  padding: 0.35rem 0.5rem;
  min-width: 6.5rem;
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  background: var(--badge);
  color: var(--accent-deep);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.home {
  padding: 2rem 1.5rem 3rem;
  max-width: 40rem;
}

.caps {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
  display: grid;
  gap: 0.5rem;
}

.caps li {
  padding: 0.65rem 0.85rem;
  border-left: 3px solid var(--accent);
  background: rgba(255, 255, 255, 0.4);
  font-size: 0.9rem;
}

.caps li.off {
  border-left-color: var(--line);
  color: var(--muted);
  opacity: 0.7;
}

.note {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.5;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 560px) {
  .top { padding: 0.85rem 1rem; }
  .home { padding: 1.5rem 1rem 2.5rem; }
}