:root {
  --page-bg: #1c1c1c;
  --card-bg: #1f2937;
  --text-primary: #ffffff;
  --text-secondary: #d5d4d8;
  --accent: #4adf86;
  --button-bg: #10b981;
  --button-bg-hover: #0ea571;
  --button-text: #ffffff;
  --divider: #2f3e53;
  --output-bg: #273549;
  --output-text: #55f991;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: var(--page-bg);
  color: var(--text-primary);
  font-family: "Inter", sans-serif;
}

.page {
  width: 100%;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: min(100%, 550px);
  min-height: 550px;
  background: var(--card-bg);
  padding: 115px 52px;
}

.title {
  margin: 0;
  max-width: 354px;
  font-family: "Karla", sans-serif;
  font-size: 40px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
}

.title-accent {
  display: block;
  color: var(--accent);
}

.subtitle {
  margin: 10px 0 0;
  font-size: 20px;
  line-height: 1.4;
  color: var(--text-secondary);
}

.options {
  display: grid;
  gap: 12px;
  margin-top: 34px;
  color: var(--text-secondary);
  font-size: 14px;
}

.length-control {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.length-control input {
  width: 76px;
  border: 1px solid var(--divider);
  border-radius: 6px;
  padding: 8px 10px;
  background: var(--output-bg);
  color: var(--text-primary);
  font: inherit;
}

.checkbox-control {
  display: flex;
  align-items: center;
  gap: 10px;
}

.checkbox-control input {
  accent-color: var(--button-bg);
}

.generate-btn {
  margin-top: 28px;
  border: 0;
  border-radius: 6px;
  padding: 9px 15px;
  min-width: 191px;
  min-height: 42px;
  background: var(--button-bg);
  color: var(--button-text);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.5;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.generate-btn:hover {
  background: var(--button-bg-hover);
}

.generate-btn:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 2px;
}

.divider {
  margin: 35px 0;
  border: 0;
  border-top: 1px solid var(--divider);
}

.password-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.password-output {
  display: grid;
  place-items: center;
  border: 0;
  min-height: 39px;
  border-radius: 6px;
  background: var(--output-bg);
  color: var(--output-text);
  cursor: pointer;
  font-family: inherit;
  font-size: 16px;
  line-height: 2;
  padding: 0 12px;
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.password-output:hover {
  filter: brightness(1.08);
}

.password-output:focus-visible,
.length-control input:focus-visible,
.checkbox-control input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .card {
    min-height: auto;
    padding: 72px 24px;
  }

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