:root {
  --color-bg: #101828;
  --color-panel: rgba(255, 255, 255, 0.08);
  --color-panel-soft: rgba(255, 255, 255, 0.12);
  --color-text: #f8fafc;
  --color-muted: #cbd5e1;
  --color-accent: #0f9f6e;
  --color-accent-dark: #047857;
  --color-warning: #d97706;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(15, 159, 110, 0.22), transparent 34%),
    linear-gradient(135deg, #101828 0%, #182235 52%, #0f172a 100%);
  color: var(--color-text);
  font-family: Arial, Helvetica, sans-serif;
}

.container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
}

.generator {
  width: min(100%, 480px);
  padding: 34px;
  background-color: transparent;
}

.ins {
  margin-bottom: 24px;
}

.ins h1 {
  margin: 0;
  font-size: clamp(2rem, 7vw, 3.2rem);
  line-height: 1.02;
  font-weight: 800;
}

.ins h1:first-child {
  color: var(--color-text);
}

.ins h1:nth-child(2) {
  color: var(--color-warning);
}

.input {
  margin-bottom: 18px;
}

.input input {
  min-height: 64px;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0;
  background-color: var(--color-panel-soft);
  color: var(--color-text);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
}

.input input::placeholder {
  color: rgba(248, 250, 252, 0.58);
}

.input input:focus,
.pass-length input:focus,
.form-check-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 0.2rem rgba(15, 159, 110, 0.18);
}

label {
  margin-bottom: 8px;
  color: var(--color-text);
  font-weight: 700;
}

.pass-length {
  margin-bottom: 14px;
}

.pass-length .mb-3 {
  margin-bottom: 0 !important;
}

.characters {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin: 20px 0 28px;
  padding: 16px;
  background-color: var(--color-panel-soft);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
}

.contains {
  width: 100%;
  margin: 0;
  color: var(--color-muted);
  font-size: 0.95rem;
  font-weight: 700;
}

.form-check {
  min-height: auto;
  margin: 0;
}

.form-check-input {
  cursor: pointer;
}

.form-check-input:checked {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.form-check-label {
  cursor: pointer;
  color: var(--color-text);
  font-weight: 700;
}

.buttons {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
}

.buttons button {
  min-height: 54px;
  padding-inline: 22px;
  border-radius: 8px;
  font-weight: 800;
}

.button-generator button {
  width: 100%;
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.button-generator button:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
}

.button-copy button {
  min-width: 112px;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.44);
}

.button-copy button:hover {
  color: var(--color-bg);
  background-color: #ffffff;
  border-color: #ffffff;
}

.alert {
  display: none;
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  margin: 0;
  padding: 12px 22px;
  border: 0;
  border-radius: 8px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.22);
}

.alert p {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 800;
}

@media (max-width: 430px) {
  .generator {
    padding: 24px;
  }

  .buttons {
    grid-template-columns: 1fr;
  }

  .button-copy button {
    width: 100%;
  }
}