:root {
  --bg: #f6f1e8;
  --panel: #fffaf1;
  --ink: #1f1a17;
  --muted: #655b54;
  --line: #d6c6b4;
  --accent: #0e7c66;
  --accent-2: #d16f3f;
  --code: #201c19;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(209, 111, 63, 0.12), transparent 30%),
    radial-gradient(circle at top right, rgba(14, 124, 102, 0.14), transparent 28%),
    var(--bg);
  color: var(--ink);
}

.hidden {
  display: none !important;
}

.overlay {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card,
.hero,
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 18px 60px rgba(61, 42, 24, 0.08);
}

.login-card {
  width: min(520px, calc(100vw - 32px));
  padding: 28px;
}

.login-actions,
.hero-buttons {
  display: flex;
  gap: 10px;
}

.login-status {
  margin-top: 14px;
  min-height: 24px;
  color: var(--muted);
}

.remember,
.toggle {
  display: flex;
  align-items: center;
  gap: 10px;
}

.shell {
  width: min(1180px, calc(100vw - 32px));
  margin: 32px auto 48px;
}

.hero {
  display: flex;
  gap: 24px;
  justify-content: space-between;
  padding: 28px;
  margin-bottom: 18px;
}

.session-box {
  display: grid;
  gap: 6px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-2);
}

h1,
h2 {
  margin: 0;
}

.lead,
.card p {
  color: var(--muted);
}

.hero-actions {
  min-width: 280px;
  display: grid;
  gap: 10px;
  align-content: start;
}

.grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr 1fr;
  margin-bottom: 18px;
}

.card {
  padding: 22px;
  margin-bottom: 18px;
}

.card-head,
.actions {
  display: flex;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span,
.toggle span,
.remember span {
  font-size: 13px;
  color: var(--muted);
}

.toggle-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.toggle-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 248, 240, 0.95)),
    #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
  cursor: pointer;
}

.toggle-copy {
  display: grid;
  gap: 6px;
}

.toggle-copy strong {
  font-size: 15px;
  color: var(--ink);
}

.toggle-copy span {
  font-size: 13px;
  color: var(--muted);
}

.switch {
  position: relative;
  display: inline-flex;
  width: 94px;
  min-width: 94px;
  height: 54px;
}

.switch input {
  position: absolute;
  inset: 0;
  opacity: 0;
  margin: 0;
  cursor: pointer;
}

.slider {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  overflow: hidden;
  background:
    radial-gradient(circle at 78% 24%, rgba(255, 255, 255, 0.16) 0 14%, transparent 15%),
    linear-gradient(180deg, #192743 0%, #23375f 55%, #0f1930 100%);
  border: 1px solid rgba(84, 108, 152, 0.45);
  box-shadow:
    inset 0 -8px 18px rgba(0, 0, 0, 0.25),
    inset 0 6px 12px rgba(255, 255, 255, 0.06),
    0 10px 22px rgba(14, 28, 53, 0.24);
  transition:
    background 280ms ease,
    box-shadow 280ms ease,
    border-color 280ms ease;
}

.day-night-slider::before {
  content: "";
  position: absolute;
  inset: 8px 12px 24px auto;
  width: 18px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.78);
  filter: blur(2px);
  opacity: 1;
  transform: translateY(0);
  transition: opacity 240ms ease, transform 240ms ease;
}

.slider-stars,
.slider-clouds,
.slider-thumb {
  position: absolute;
  pointer-events: none;
}

.slider-stars {
  inset: 0;
  opacity: 1;
  transition: opacity 260ms ease, transform 260ms ease;
  transform: translateY(0);
}

.slider-stars::before,
.slider-stars::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 245, 210, 0.95);
  box-shadow:
    18px 8px 0 -1px rgba(255, 245, 210, 0.85),
    32px -4px 0 -2px rgba(255, 245, 210, 0.78),
    34px 12px 0 -1px rgba(255, 245, 210, 0.9),
    49px 3px 0 -2px rgba(255, 245, 210, 0.8);
}

.slider-stars::before {
  width: 4px;
  height: 4px;
  top: 11px;
  left: 14px;
}

.slider-stars::after {
  width: 3px;
  height: 3px;
  top: 22px;
  left: 28px;
  box-shadow:
    14px -9px 0 -1px rgba(255, 245, 210, 0.88),
    26px 3px 0 -1px rgba(255, 245, 210, 0.78),
    39px -10px 0 -1px rgba(255, 245, 210, 0.82);
}

.slider-clouds {
  left: 10px;
  right: 18px;
  bottom: 7px;
  height: 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow:
    16px -6px 0 2px rgba(255, 255, 255, 0.95),
    34px -2px 0 1px rgba(255, 255, 255, 0.85),
    48px -8px 0 2px rgba(255, 255, 255, 0.92);
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 260ms ease, transform 260ms ease;
}

.slider-thumb {
  top: 5px;
  left: 6px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 36% 34%, rgba(250, 252, 255, 0.96) 0 18%, transparent 19%),
    linear-gradient(180deg, #dfe6f5 0%, #b2bfd7 100%);
  box-shadow:
    0 5px 12px rgba(7, 14, 29, 0.34),
    inset -6px -7px 10px rgba(98, 111, 137, 0.3),
    inset 4px 4px 8px rgba(255, 255, 255, 0.65);
  transition:
    transform 280ms cubic-bezier(0.22, 1, 0.36, 1),
    background 280ms ease,
    box-shadow 280ms ease;
}

.slider-thumb::before,
.slider-thumb::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  opacity: 0;
  transition: opacity 220ms ease;
}

.slider-thumb::before {
  inset: 8px 9px 11px 13px;
  background: rgba(159, 170, 198, 0.4);
}

.slider-thumb::after {
  width: 8px;
  height: 8px;
  top: 10px;
  left: 23px;
  background: rgba(159, 170, 198, 0.3);
}

.slider-thumb::before,
.slider-thumb::after {
  opacity: 1;
}

.switch input:checked + .slider {
  background:
    radial-gradient(circle at 22% 28%, rgba(255, 249, 201, 0.95) 0 10%, transparent 11%),
    linear-gradient(180deg, #92d7ff 0%, #6db7ff 52%, #4f97e0 100%);
  border-color: rgba(86, 122, 170, 0.28);
  box-shadow:
    inset 0 -8px 18px rgba(23, 78, 138, 0.18),
    inset 0 6px 12px rgba(255, 255, 255, 0.45),
    0 10px 22px rgba(38, 74, 118, 0.18);
}

.switch input:checked + .slider .slider-stars {
  opacity: 0;
  transform: translateY(-6px);
}

.switch input:checked + .slider .slider-clouds {
  opacity: 1;
  transform: translateY(0);
}

.switch input:checked + .slider .slider-thumb {
  transform: translateX(40px);
  background:
    radial-gradient(circle at 34% 32%, rgba(255, 251, 220, 0.95) 0 20%, transparent 21%),
    radial-gradient(circle at 64% 68%, rgba(255, 179, 40, 0.26) 0 12%, transparent 13%),
    linear-gradient(180deg, #ffd96a 0%, #ffb21a 100%);
  box-shadow:
    0 5px 12px rgba(129, 87, 8, 0.35),
    inset -6px -7px 10px rgba(180, 101, 0, 0.22),
    inset 4px 4px 8px rgba(255, 251, 209, 0.72);
}

.switch input:checked + .slider .slider-thumb::before,
.switch input:checked + .slider .slider-thumb::after,
.switch input:checked + .slider::before {
  opacity: 0;
}

.switch input:checked + .slider::before {
  transform: translateY(-6px);
}

.wide {
  grid-column: span 2;
}

input,
select,
button,
textarea,
code {
  font: inherit;
}

input,
select,
textarea {
  border-radius: 12px;
  border: 1px solid var(--line);
  padding: 12px 14px;
  background: #fff;
  color: var(--ink);
}

button {
  border-radius: 12px;
  border: none;
  padding: 12px 14px;
  background: var(--accent);
  color: white;
  cursor: pointer;
  transition: transform 140ms ease, opacity 140ms ease;
}

button:hover {
  transform: translateY(-1px);
  opacity: 0.94;
}

button.secondary {
  background: var(--accent-2);
}

.status,
.codebox {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
  color: var(--code);
  white-space: pre-wrap;
  word-break: break-word;
}

.codebox {
  font-family: "Cascadia Code", Consolas, monospace;
  min-height: 180px;
}

.codebox.large {
  min-height: 240px;
  width: 100%;
}

@media (max-width: 900px) {
  .grid,
  .form-grid,
  .toggle-grid,
  .hero {
    grid-template-columns: 1fr;
    display: grid;
  }

  .hero-actions,
  .wide {
    min-width: 0;
    grid-column: auto;
  }

  .login-actions,
  .hero-buttons {
    flex-direction: column;
  }
}