:root {
  --ink: #1c2128;
  --gold: #f5b400;
  --red: #e23b3b;
  --line: #d5dbe3;
  font-family: Inter, "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  min-height: 100vh;
  background: #e8a24a url("login-bg.jpg") center / cover no-repeat;
  color: var(--ink);
  font-family: Inter, "Segoe UI", system-ui, sans-serif;
  display: grid;
  place-items: center;
  padding: 24px;
}
button, input { font: inherit; color: inherit; }

.card {
  width: min(420px, calc(100vw - 48px));
  min-height: min(420px, calc(100vw - 48px));
  background: #fff;
  box-shadow: 0 18px 50px rgba(20, 28, 40, 0.28);
  display: flex;
  flex-direction: column;
}
.card-head {
  background: #000;
  height: 88px;
  display: grid;
  place-items: center;
  padding: 0 20px;
  flex: 0 0 auto;
}
.card-head img {
  height: 46px;
  width: auto;
  max-width: 100%;
  display: block;
}
form {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
  padding: 28px 28px 32px;
}
label {
  display: block;
  font-size: 15px;
  margin-bottom: 6px;
}
input {
  width: 100%;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 12px 14px;
  outline: none;
  min-height: 46px;
}
input:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(245, 180, 0, 0.2);
}
button {
  border: 0;
  border-radius: 8px;
  min-height: 48px;
  padding: 12px 18px;
  font-weight: 700;
  font-size: 16px;
  background: var(--gold);
  color: #1a1d21;
  cursor: pointer;
  margin-top: 4px;
}
button:hover { filter: brightness(0.97); }
button:disabled { background: #eceff3; color: #b0b6be; cursor: default; }
.err {
  color: var(--red);
  font-size: 14px;
  margin: 0;
  min-height: 1.2em;
}