/* ─────────────────────────────
   Tokens
───────────────────────────── */
:root {
    --bg:           #faf9ff;
    --surface:      #ffffff;
    --surface-2:    #f3f0ff;
    --text:         #16112b;
    --text-2:       #6e6688;
    --border:       rgba(109, 40, 217, 0.12);
    --border-on:    rgba(109, 40, 217, 0.3);
    --accent:       #7c3aed;
    --accent-dim:   #6d28d9;
    --accent-soft:  rgba(124, 58, 237, 0.1);
    --accent-fg:    #ffffff;
    --ok:           #5b21b6;
    --err:          #be123c;
    --shadow:       0 24px 80px rgba(109, 40, 217, 0.10);
    --topbar-h:     3.75rem;
    --r:            1.5rem;
    --r-sm:         0.85rem;
    --container:    76rem;
    color-scheme: light;
  }
  
  @media (prefers-color-scheme: dark) {
    html:not([data-theme]) {
      --bg:           #000000;
      --surface:      #0c0c10;
      --surface-2:    #13121a;
      --text:         #ece8ff;
      --text-2:       #7a7290;
      --border:       rgba(167, 139, 250, 0.11);
      --border-on:    rgba(167, 139, 250, 0.3);
      --accent:       #a78bfa;
      --accent-dim:   #c4b5fd;
      --accent-soft:  rgba(167, 139, 250, 0.1);
      --accent-fg:    #000000;
      --ok:           #c4b5fd;
      --err:          #fb7185;
      --shadow:       0 32px 80px rgba(0, 0, 0, 0.6);
      color-scheme: dark;
    }
  }
  
  html[data-theme="light"] {
    --bg:           #faf9ff;
    --surface:      #ffffff;
    --surface-2:    #f3f0ff;
    --text:         #16112b;
    --text-2:       #6e6688;
    --border:       rgba(109, 40, 217, 0.12);
    --border-on:    rgba(109, 40, 217, 0.3);
    --accent:       #7c3aed;
    --accent-dim:   #6d28d9;
    --accent-soft:  rgba(124, 58, 237, 0.1);
    --accent-fg:    #ffffff;
    --ok:           #5b21b6;
    --err:          #be123c;
    --shadow:       0 24px 80px rgba(109, 40, 217, 0.10);
    color-scheme: light;
  }
  
  html[data-theme="dark"] {
    --bg:           #000000;
    --surface:      #0c0c10;
    --surface-2:    #13121a;
    --text:         #ece8ff;
    --text-2:       #7a7290;
    --border:       rgba(167, 139, 250, 0.11);
    --border-on:    rgba(167, 139, 250, 0.3);
    --accent:       #a78bfa;
    --accent-dim:   #c4b5fd;
    --accent-soft:  rgba(167, 139, 250, 0.1);
    --accent-fg:    #000000;
    --ok:           #c4b5fd;
    --err:          #fb7185;
    --shadow:       0 32px 80px rgba(0, 0, 0, 0.6);
    color-scheme: dark;
  }
  
  /* ─────────────────────────────
     Reset
  ───────────────────────────── */
  *, *::before, *::after  { box-sizing: border-box; }
  html                    { scroll-behavior: smooth; }
  
  body {
    margin: 0;
    min-width: 320px;
    background: var(--bg);
    color: var(--text);
    font-family: 'Plus Jakarta Sans', ui-sans-serif, system-ui, sans-serif;
    font-size: 1rem;
    line-height: 1.65;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
  }
  
  button, input, textarea { font: inherit; }
  textarea                { resize: none; }
  img, svg                { display: block; max-width: 100%; }
  p                       { margin: 0; }
  h1, h2, h3              { margin: 0; }
  fieldset                { border: none; margin: 0; padding: 0; }
  
  a { color: var(--accent); text-underline-offset: 0.2em; }
  a:hover { color: var(--accent-dim); }
  
  :focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
  ::selection    { background: var(--accent-soft); }
  
  /* ─────────────────────────────
     Layout
  ───────────────────────────── */
  .container {
    width: min(calc(100% - 1.75rem), var(--container));
    margin-inline: auto;
  }
  
  @media (min-width: 40rem) {
    .container { width: min(calc(100% - 2rem), var(--container)); }
  }
  
  .skip-link {
    position: absolute;
    top: -5rem;
    left: 1rem;
    z-index: 200;
    padding: 0.7rem 1.1rem;
    border-radius: 999px;
    background: var(--accent);
    color: var(--accent-fg);
    font-weight: 700;
    text-decoration: none;
  }
  .skip-link:focus { top: 1rem; }
  
  /* ─────────────────────────────
     Topbar (fixed)
  ───────────────────────────── */
  .topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--topbar-h);
    z-index: 100;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
  }
  
  .topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
  }
  
  /* DM Serif Display italic for brand */
  .brand {
    font-family: 'DM Serif Display', Georgia, serif;
    font-style: italic;
    font-size: 1.1rem;
    font-weight: 400;
    letter-spacing: 0;
    color: var(--accent);
    white-space: nowrap;
  }
  
  .theme-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 2.4rem;
    padding: 0.55rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: transparent;
    color: var(--text-2);
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: border-color 160ms ease, color 160ms ease;
  }
  .theme-btn:hover {
    border-color: var(--border-on);
    color: var(--text);
  }
  
  /* ─────────────────────────────
     Landing (full viewport)
  ───────────────────────────── */
  .landing {
    min-height: 100vh;           /* fallback */
    min-height: 100svh;
    padding-top: var(--topbar-h);
    display: flex;
    flex-direction: column;
  }
  
  /* ─────────────────────────────
     Hero
  ───────────────────────────── */
  .hero {
    flex: 1;
    display: flex;
    align-items: center;
    padding: 3.5rem 0 2.5rem;
  }
  
  .eyebrow {
    margin: 0 0 1rem;
    color: var(--accent);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
  }
  
  /* DM Serif Display for the main heading */
  h1 {
    font-family: 'DM Serif Display', Georgia, serif;
    font-style: normal;
    font-weight: 400;
    font-size: clamp(2.4rem, 5.5vw, 4.5rem);
    line-height: 1.1;
    letter-spacing: -0.01em;
    max-width: 16ch;
  }
  
  .hero-sub {
    margin-top: 1.25rem;
    max-width: 34rem;
    color: var(--text-2);
    font-size: 1.05rem;
    line-height: 1.7;
  }
  
  /* ─────────────────────────────
     Landing info cards
  ───────────────────────────── */
  .landing-cards {
    padding: 0 0 1.5rem;
  }
  
  .cards-grid {
    display: grid;
    gap: 1rem;
  }
  
  @media (min-width: 42rem) {
    .cards-grid { grid-template-columns: repeat(2, 1fr); }
  }
  
  @media (min-width: 64rem) {
    .cards-grid { grid-template-columns: repeat(3, 1fr); }
  }
  
  .landing-card {
    padding: 1.4rem 1.5rem;
    border: 1px solid var(--border);
    border-radius: var(--r);
    background: var(--surface);
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
  }
  
  .card-eyebrow {
    color: var(--accent);
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.13em;
    text-transform: uppercase;
  }
  
  /* DM Serif Display for h2 headings */
  h2 {
    font-family: 'DM Serif Display', Georgia, serif;
    font-style: normal;
    font-weight: 400;
    font-size: clamp(1.1rem, 1.8vw, 1.35rem);
    line-height: 1.25;
    letter-spacing: -0.01em;
  }
  
  .landing-card p:not(.card-eyebrow) {
    color: var(--text-2);
    font-size: 0.96rem;
    line-height: 1.65;
    margin: 0;
  }
  
  /* ─────────────────────────────
     Scroll CTA
  ───────────────────────────── */
  .scroll-cta-wrap {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1.25rem 0 2rem;
  }
  
  .scroll-cta {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-2);
    transition: color 200ms ease;
  }
  .scroll-cta:hover { color: var(--accent); }
  
  .scroll-cta-text {
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.07em;
    text-transform: uppercase;
  }
  
  .scroll-arrow {
    display: block;
    font-size: 1.15rem;
    animation: drift 2.2s ease-in-out infinite;
  }
  
  @keyframes drift {
    0%, 100% { transform: translateY(0); opacity: 0.7; }
    50%       { transform: translateY(6px); opacity: 1; }
  }
  
  /* ─────────────────────────────
     Generator section
  ───────────────────────────── */
  #generator {
    padding: 3rem 0 0;
  }
  
  .generator-wrap {
    padding-bottom: 3rem;
  }
  
  /* ─────────────────────────────
     Generator card
  ───────────────────────────── */
  .generator-card {
    border: 1px solid var(--border);
    border-radius: var(--r);
    background: var(--surface);
    box-shadow: var(--shadow);
    overflow: hidden;
  }
  
  /* ─────────────────────────────
     Two-column layout
     1px gap-as-border trick: grid bg = border, gap = 1px
  ───────────────────────────── */
  .generator-body {
    display: grid;
    background: var(--border);
    gap: 1px 0;
  }
  
  @media (min-width: 62rem) {
    .generator-body {
      grid-template-columns: 1fr 1.05fr;
      gap: 0 1px;
    }
  }
  
  /* ─────────────────────────────
     Output column
  ───────────────────────────── */
  .output-col {
    display: flex;
    flex-direction: column;
    background: var(--surface-2);
  }
  
  .output-zone {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 1.4rem;
  }
  
  .output-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.8rem;
  }
  
  .zone-label {
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-2);
  }
  
  .password-output {
    flex: 1;
    width: 100%;
    min-height: 10rem;
    padding: 1rem 1.05rem;
    border: 1px solid var(--border);
    border-radius: var(--r-sm);
    background: var(--surface);
    color: var(--text);
    font-family: ui-monospace, 'SF Mono', Menlo, Monaco, Consolas, monospace;
    font-size: 1rem;
    line-height: 1.65;
    letter-spacing: 0.025em;
    word-break: break-all;
    white-space: pre-wrap;
    transition: border-color 160ms;
  }
  .password-output::placeholder {
    color: var(--text-2);
    font-family: 'Plus Jakarta Sans', sans-serif;
    letter-spacing: 0;
  }
  .password-output:focus {
    outline: none;
    border-color: var(--border-on);
  }
  
  .hint {
    margin-top: 0.6rem;
    color: var(--text-2);
    font-size: 0.87rem;
  }
  
  .copy-btn {
    display: inline-flex;
    align-items: center;
    min-height: 2.2rem;
    padding: 0.45rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface);
    color: var(--text-2);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 160ms, color 160ms;
  }
  .copy-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
  }
  
  /* ─────────────────────────────
     Settings column
  ───────────────────────────── */
  .settings-col {
    display: flex;
    flex-direction: column;
    background: var(--surface);
  }
  
  .setting-block {
    padding: 1.1rem 1.4rem;
    display: grid;
    gap: 0.85rem;
  }
  
  .setting-block + .setting-block {
    border-top: 1px solid var(--border);
  }
  
  .setting-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
  }
  
  .setting-label {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text);
    margin: 0;
  }
  
  legend {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text);
    padding: 0;
    float: left;
    width: 100%;
  }
  
  label { color: var(--text); font-weight: 600; }
  
  /* ─────────────────────────────
     Range slider
  ───────────────────────────── */
  input[type="range"] {
    appearance: none;
    -webkit-appearance: none;
    width: 100%;
    height: 0.25rem;
    border-radius: 999px;
    background: var(--border-on);
    outline: none;
    cursor: pointer;
  }
  input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    -webkit-appearance: none;
    width: 1.4rem;
    height: 1.4rem;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid var(--surface);
    box-shadow: 0 0 0 1.5px var(--accent);
    cursor: pointer;
    transition: transform 120ms;
  }
  input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.15); }
  input[type="range"]::-moz-range-thumb {
    width: 1.4rem;
    height: 1.4rem;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid var(--surface);
    box-shadow: 0 0 0 1.5px var(--accent);
    cursor: pointer;
  }
  
  .value-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 3.2rem;
    padding: 0.3rem 0.7rem;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
    font-weight: 700;
    font-size: 0.95rem;
    font-variant-numeric: tabular-nums;
  }
  
  .range-ends {
    display: flex;
    justify-content: space-between;
    color: var(--text-2);
    font-size: 0.82rem;
  }
  
  /* ─────────────────────────────
     Chip toggles
  ───────────────────────────── */
  .chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
  }
  .chip-group-col { flex-direction: column; }
  
  .chip {
    display: inline-flex;
    align-items: center;
    padding: 0.55rem 1rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: transparent;
    color: var(--text-2);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    user-select: none;
    transition: border-color 160ms, background 160ms, color 160ms;
  }
  .chip:hover {
    border-color: var(--border-on);
    color: var(--text);
  }
  .chip:has(input:checked) {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: var(--accent);
    font-weight: 600;
  }
  .chip:has(input:focus-visible) {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
  }
  .chip input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
  }
  .chip-block {
    width: 100%;
    border-radius: var(--r-sm);
    justify-content: flex-start;
  }
  
  /* ─────────────────────────────
     Text input
  ───────────────────────────── */
  .field-wrap { display: grid; gap: 0.45rem; }
  
  input[type="text"] {
    width: 100%;
    min-height: 3rem;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--r-sm);
    background: var(--surface-2);
    color: var(--text);
    font-weight: 500;
    transition: border-color 160ms, background 160ms;
  }
  input[type="text"]:focus {
    outline: none;
    border-color: var(--border-on);
    background: var(--surface);
  }
  input[type="text"]::placeholder {
    color: var(--text-2);
    font-weight: 400;
  }
  
  /* ─────────────────────────────
     Strength bar
  ───────────────────────────── */
  .strength-track {
    height: 0.35rem;
    border-radius: 999px;
    background: var(--border-on);
    overflow: hidden;
  }
  .strength-fill {
    display: block;
    height: 100%;
    width: 0%;
    border-radius: inherit;
    transition: width 320ms cubic-bezier(0.4,0,0.2,1), background-color 320ms ease;
  }
  .strength-fill[data-strength="empty"]       { width: 0%;   background: transparent; }
  .strength-fill[data-strength="very-weak"]   { width: 20%;  background: #5b21b6; }
  .strength-fill[data-strength="fair"]        { width: 40%;  background: #7c3aed; }
  .strength-fill[data-strength="good"]        { width: 60%;  background: #8b5cf6; }
  .strength-fill[data-strength="strong"]      { width: 80%;  background: #a78bfa; }
  .strength-fill[data-strength="very-strong"] { width: 100%; background: #c4b5fd; }
  
  /* ─────────────────────────────
     Feedback block
  ───────────────────────────── */
  .feedback-block {
    min-height: 3rem;
    gap: 0.4rem;
    justify-content: center;
  }
  .status-msg, .error-msg {
    min-height: 1.4rem;
    font-size: 0.9rem;
    font-weight: 600;
  }
  .status-msg { color: var(--ok); }
  .error-msg  { color: var(--err); }
  
  /* ─────────────────────────────
     Generate button
  ───────────────────────────── */
  .generate-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 3.75rem;
    padding: 1rem;
    border: none;
    border-radius: 0 0 var(--r) var(--r);
    background: var(--accent);
    color: var(--accent-fg);
    font-family: 'DM Serif Display', Georgia, serif;
    font-style: italic;
    font-size: 1.15rem;
    font-weight: 400;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: background-color 160ms, transform 120ms;
  }
  .generate-btn:hover  { background: var(--accent-dim); }
  .generate-btn:active { transform: scale(0.999); }
  
  /* ─────────────────────────────
     Footer
  ───────────────────────────── */
  .site-footer  { padding-bottom: 2.5rem; }
  .footer-inner {
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
  }
  .site-footer p {
    color: var(--text-2);
    font-size: 0.92rem;
  }
  
  /* ─────────────────────────────
     Utilities
  ───────────────────────────── */
  .sr-only {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
  }
  
  [aria-invalid="true"] {
    border-color: var(--err) !important;
    box-shadow: 0 0 0 3px rgba(251, 113, 133, 0.15);
  }
  
  /* ─────────────────────────────
     Reduced motion
  ───────────────────────────── */
  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
      animation: none !important;
      transition-duration: 0.01ms !important;
    }
    .strength-fill { transition: none; }
  }