/* ===== Fonts ===== */

@font-face {
  font-family: "Literata";
  src:
    url("/fonts/literata-latin-opsz-normal.woff2") format("woff2"),
    url("/fonts/literata-latin-ext-opsz-normal.woff2") format("woff2");
  font-weight: 200 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  src:
    url("/fonts/inter-latin-opsz-normal.woff2") format("woff2"),
    url("/fonts/inter-latin-ext-opsz-normal.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src:
    url("/fonts/jetbrains-mono-latin-wght-normal.woff2") format("woff2"),
    url("/fonts/jetbrains-mono-latin-ext-wght-normal.woff2") format("woff2");
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
}

/* ===== Design tokens ===== */

:root {
  --font-body: "Literata", Georgia, "Times New Roman", serif;
  --font-ui: "Inter", system-ui, -apple-system, sans-serif;
  --font-code: "JetBrains Mono", ui-monospace, "Cascadia Code", monospace;

  --text-sm: clamp(0.833rem, 0.75rem + 0.2vw, 0.875rem);
  --text-base: clamp(1rem, 0.9rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.2rem, 1.05rem + 0.4vw, 1.35rem);
  --text-xl: clamp(1.44rem, 1.2rem + 0.6vw, 1.62rem);
  --text-2xl: clamp(1.728rem, 1.4rem + 0.8vw, 1.944rem);
  --text-3xl: clamp(2.074rem, 1.6rem + 1.2vw, 2.488rem);

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  --leading-tight: 1.2;
  --leading-body: 1.6;

  --measure: 40rem;

  /* Light theme */
  --color-bg: #faf6f0;
  --color-text: #3d3530;
  --color-muted: #6b5f55;
  --color-accent: #8b4513;
  --color-border: #d4cdc5;
  --color-surface: #f0ece6;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1e1a17;
    --color-text: #e8e0d6;
    --color-muted: #a89888;
    --color-accent: #d4945a;
    --color-border: #4a4038;
    --color-surface: #2a2420;
  }
}

/* ===== Reset ===== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ===== Layout ===== */

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}

main {
  width: 100%;
  max-width: var(--measure);
}

/* ===== Header ===== */

h1 {
  font-family: var(--font-ui);
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: var(--leading-tight);
  margin-block-end: var(--space-xs);
}

.subtitle {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-muted);
  margin-block-end: var(--space-2xl);
}

/* ===== Passphrase output ===== */

.passphrase-display {
  font-family: var(--font-code);
  font-size: var(--text-xl);
  overflow-wrap: break-word;
  word-wrap: break-word;
  padding: var(--space-lg);
  background-color: var(--color-surface);
  border-radius: 0.25rem;
  border: 0.0625rem solid var(--color-border);
  min-height: 4rem;
  cursor: pointer;
  transition: border-color 0.15s;
}

.passphrase-display:hover {
  border-color: var(--color-accent);
}

.passphrase-display:focus-visible {
  outline: 0.125rem solid var(--color-accent);
  outline-offset: 0.125rem;
}

.passphrase-display .word {
  white-space: nowrap;
}

.passphrase-display .separator {
  white-space: pre;
  color: var(--color-muted);
}

/* ===== Controls ===== */

.controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  margin-block-start: var(--space-lg);
}

.btn {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: 0.5em 1.2em;
  border-radius: 0.25rem;
  border: 0.0625rem solid var(--color-border);
  background-color: var(--color-bg);
  color: var(--color-text);
  cursor: pointer;
  transition: border-color 0.15s, background-color 0.15s;
}

.btn:hover {
  border-color: var(--color-accent);
}

.btn:focus-visible {
  outline: 0.125rem solid var(--color-accent);
  outline-offset: 0.125rem;
}

.btn-primary {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
}

.btn-primary:hover {
  opacity: 0.9;
}

/* ===== Options ===== */

.options {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
  margin-block-start: var(--space-lg);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-muted);
}

.options label {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  cursor: pointer;
}

@media (max-width: 30rem) {
  .options {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .options label {
    justify-content: space-between;
  }

  .options select {
    flex: 1;
    min-width: 0;
  }
}

.options select,
.options input[type="number"] {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  padding: 0.25em 0.5em;
  border: 0.0625rem solid var(--color-border);
  border-radius: 0.25rem;
  background-color: var(--color-bg);
  color: var(--color-text);
}

/* ===== Entropy info ===== */

.entropy {
  margin-block-start: var(--space-md);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-muted);
}

/* ===== Entropy table ===== */

.entropy-table-wrapper {
  margin-block-start: var(--space-2xl);
  overflow-x: auto;
}

.entropy-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
}

.entropy-table th,
.entropy-table td {
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 0.0625rem solid var(--color-border);
}

.entropy-table th {
  font-weight: 600;
  color: var(--color-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.entropy-table td:nth-child(2),
.entropy-table td:nth-child(3) {
  font-family: var(--font-code);
}

.entropy-table td:last-child {
  color: var(--color-muted);
}

.entropy-table tr.active {
  font-weight: 700;
}

/* ===== Footer ===== */

footer {
  margin-block-start: var(--space-3xl);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-muted);
  text-align: center;
}

footer a {
  color: var(--color-accent);
}

/* ===== Copy feedback ===== */

.copied-toast {
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%) translateY(1rem);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  background-color: var(--color-surface);
  border: 0.0625rem solid var(--color-border);
  padding: var(--space-sm) var(--space-md);
  border-radius: 0.25rem;
  opacity: 0;
  transition: opacity 0.2s, transform 0.2s;
  pointer-events: none;
}

.copied-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===== Reduced motion ===== */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
  }
}