:root {
  --bg: #f3efe9;
  --bg-2: #e9e1d6;
  --card: #ffffff;
  --ink: #3a2a22;
  --muted: #927d70;
  --line: #e4dad0;
  --accent: #b14a3f;
  --accent-ink: #ffffff;
  --danger-bg: #fbeceb;
  --danger-ink: #a23b32;
  --danger-line: #efc9c5;
  --radius: 14px;
  --shadow: 0 10px 40px rgba(58, 42, 34, .12), 0 2px 8px rgba(58, 42, 34, .06);
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 50% -10%, var(--bg-2), transparent 60%),
    var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  -webkit-font-smoothing: antialiased;
}

.card {
  width: 100%;
  max-width: 380px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px 28px 22px;
}

.brand { text-align: center; margin-bottom: 22px; }
.logo {
  display: block;
  margin: 0 auto 12px;
  width: 72px;
  height: 72px;
  padding: 6px;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 4px 14px rgba(58, 42, 34, .14);
}
.brand-name {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .2px;
}
.brand-sub {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.form { display: flex; flex-direction: column; gap: 14px; }

.field { display: flex; flex-direction: column; gap: 6px; }
.field-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
}
.field input {
  width: 100%;
  padding: 11px 13px;
  font-size: 15px;
  color: var(--ink);
  background: #fcfaf8;
  border: 1px solid var(--line);
  border-radius: 10px;
  outline: none;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
.field input::placeholder { color: #b9a89c; }
.field input:focus {
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(177, 74, 63, .14);
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  margin-top: -2px;
}
.remember {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
}
.remember input { accent-color: var(--accent); }

.link { color: var(--accent); text-decoration: none; }
.link:hover { text-decoration: underline; }
.link.muted { color: var(--muted); }

.btn {
  position: relative;
  margin-top: 4px;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--accent-ink);
  background: var(--accent);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: filter .15s, opacity .15s;
}
.btn:hover { filter: brightness(1.05); }
.btn:active { filter: brightness(.96); }
.btn[disabled] { opacity: .7; cursor: default; }

.spinner {
  display: none;
  position: absolute;
  right: 14px;
  top: 50%;
  width: 16px;
  height: 16px;
  margin-top: -8px;
  border: 2px solid rgba(255, 255, 255, .5);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
.btn.loading .spinner { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }

.alert {
  font-size: 13.5px;
  line-height: 1.4;
  color: var(--danger-ink);
  background: var(--danger-bg);
  border: 1px solid var(--danger-line);
  border-radius: 10px;
  padding: 10px 12px;
}

.foot {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 12.5px;
  color: var(--muted);
}
.foot .dot { margin: 0 7px; opacity: .6; }

@keyframes shake {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}
.card.shake { animation: shake .5s cubic-bezier(.36, .07, .19, .97); }

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #211913;
    --bg-2: #2c211a;
    --card: #2a201a;
    --ink: #f0e7df;
    --muted: #b29c8d;
    --line: #3c2e25;
    --accent: #d2685a;
    --danger-bg: #3a2420;
    --danger-ink: #f1b3ab;
    --danger-line: #5b342e;
    --shadow: 0 10px 40px rgba(0, 0, 0, .45);
  }
  .field input { background: #241b15; }
  .field input:focus { background: #2a201a; }
}