:root {
  --card-bg: rgba(255, 255, 255, 0.92);
  --text: #111827;
  --muted: #6b7280;
  --border: rgba(17, 24, 39, 0.12);
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.18);
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, sans-serif;
  color: var(--text);
}

/* Full-page background */
.page {
  min-height: 100vh;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;

  /* Option A: background image */
  background-image:
    linear-gradient(120deg, rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.25)),
    url("/static/background.svg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

/* Header + logo */
.header {
  position: absolute;
  top: 20px;
  left: 20px;
}

.logo {
  height: 100px;
  width: auto;
  display: block;
  filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.35));
}

/* Login card */
.card {
  width: 100%;
  max-width: 420px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  backdrop-filter: blur(8px);
}

.card h1 {
  margin: 0 0 8px 0;
  font-size: 22px;
  line-height: 1.2;
}

.subtitle {
  margin: 0 0 18px 0;
  color: var(--muted);
  font-size: 14px;
}

.form {
  display: grid;
  gap: 10px;
}

.label {
  font-size: 13px;
  color: var(--muted);
}

.input {
  width: 100%;
  padding: 12px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 15px;
  outline: none;
  background: rgba(255,255,255,0.95);
}

.input:focus {
  border-color: rgba(17, 24, 39, 0.35);
  box-shadow: 0 0 0 4px rgba(17, 24, 39, 0.08);
}

.btn {
  margin-top: 6px;
  padding: 12px 14px;
  border: 0;
  border-radius: 12px;
  font-size: 15px;
  cursor: pointer;
  background: #111827;
  color: white;
}

.btn:hover {
  filter: brightness(1.06);
}

.btn:active {
  transform: translateY(1px);
}

/* Mobile tweaks */
@media (max-width: 420px) {
  .header {
    left: 16px;
    top: 16px;
  }
  .logo {
    height: 40px;
  }
  .card {
    padding: 22px;
  }
}