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

:root {
    --deep:   #031725;
    --navy:   #022E5B;
    --blue:   #499BED;
    --light:  #A1C6F6;
    --pale:   #DAEAFF;
    --bg:     #f0f6ff;
    --card-bg:#ffffff;
    --border: #c2daf8;
    --text:   #031725;
    --text-2: #022E5B;
    --radius: 6px;
    --font-display: 'Space Mono', monospace;
    --font-body:    'Space Grotesk', sans-serif;
}

html { font-size: clamp(14px, 1vh, 28px); scroll-behavior: smooth; }

body{background: var(--bg);color: var(--ash);font-family: var(--font-body);}

header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(240,246,255,0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 0 2rem;
    height: 3.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;

    & .logo {
        font-family: var(--font-display);
        font-size: 1.5rem;
        color: var(--navy);
        letter-spacing: -0.02em;
        text-decoration: none;
        & span { 
            color: var(--blue); 
        }
    }

    & nav { 
        display: flex; gap: 1.5rem; align-items: center; 
        & a{
            color: var(--text-2);
            text-decoration: none;
            font-size: 1rem;
            opacity: 0.6;
            transition: opacity 0.2s, color 0.2s;
            &:hover { opacity: 1; color: var(--blue); }
        }

    }
}

.page-header {
    max-width: 60rem;
    margin: 0 auto;
    padding: 1.5rem 2rem 2rem;

    & h1 {
        font-family: var(--font-display);
        font-size: clamp(1.6rem, 4vw, 2.4rem);
        color: var(--navy);
        letter-spacing: -1px;
        margin-bottom: 0.5rem;
    }
}

.tool-wrap {
    max-width: 60rem;
    margin: 0 auto;
    padding: 0 2rem 4rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;

    & .card {
        background: var(--card-bg);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 1.5rem;
        box-shadow: 0 2px 12px rgba(3,23,37,0.06);
    }

    & .output-wrap {
        display: flex;
        align-items: center;
        gap: 0.75rem;
    }

    & .output {
        flex: 1;
        font-family: var(--font-display);
        font-size: clamp(0.85rem, 2.5vw, 1.15rem);
        color: var(--navy);
        background: var(--bg);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 0.9rem 1rem;
        word-break: break-all;
        min-height: 3rem;
        line-height: 1.5;
        letter-spacing: 1px;
    }

    & .btn-icon {
        flex-shrink: 0;
        width: 2.75rem;
        height: 2.75rem;
        border-radius: var(--radius);
        border: 1px solid var(--border);
        background: var(--card-bg);
        color: var(--navy);
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 0.2s;
        &:hover { background: var(--pale); border-color: var(--blue); color: var(--blue); }
        & svg { width: 1.1rem; height: 1.1rem; }
    }
}
.strength-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.75rem;
    & .strength-bars {
        display: flex;
        gap: 4px;
        flex: 1;
    }
    & .strength-bar {
        height: 4px;
        flex: 1;
        border-radius: 2px;
        background: var(--border);
        transition: background 0.3s;
    }
    & .strength-label {
        font-family: var(--font-display);
        font-size: 0.65rem;
        letter-spacing: 0.1em;
        text-transform: uppercase;
        color: var(--text-2);
        opacity: 0.5;
        white-space: nowrap;
    }
}

.settings-title {
    font-family: var(--font-display);
    font-size: 1rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--blue);
    opacity: 0.7;
    margin-bottom: 1.25rem;
}

.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
    &:last-child { border-bottom: none; padding-bottom: 0; }
    &:first-of-type { padding-top: 0; }

    & .setting-label {
        font-size: 1.2rem;
        color: var(--text-2);
        font-weight: 500;
    }
    & .setting-sub {
        font-size: 1rem;
        color: var(--text-2);
        opacity: 0.45;
        margin-top: 0.1rem;
    }
}

    .input-number-wrap input[type="number"] {
      width: 4.5rem;
      padding: 0.4rem 0.6rem;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      font-family: var(--font-display);
      font-size: 1rem;
      color: var(--navy);
      background: var(--bg);
      outline: none;
      text-align: center;
      transition: border-color 0.2s;
    }
    .input-number-wrap input[type="number"]:focus {
      border-color: var(--blue);
    }

    /* toggle switch */
    .toggle {
      position: relative;
      width: 2.5rem;
      height: 1.4rem;
      flex-shrink: 0;
    }
    .toggle input { opacity: 0; width: 0; height: 0; }
    .toggle-track {
      position: absolute;
      inset: 0;
      background: var(--border);
      border-radius: 999px;
      cursor: pointer;
      transition: background 0.2s;
    }
    .toggle input:checked + .toggle-track { background: var(--blue); }
    .toggle-track::after {
      content: '';
      position: absolute;
      top: 3px;
      left: 3px;
      width: calc(1.4rem - 6px);
      height: calc(1.4rem - 6px);
      border-radius: 50%;
      background: white;
      transition: transform 0.2s;
    }
    .toggle input:checked + .toggle-track::after {
      transform: translateX(1.1rem);
    }

    /* ── GENERATE BUTTON ── */
    .btn-generate {
      width: 100%;
      padding: 0.9rem;
      background: var(--blue);
      color: white;
      border: none;
      border-radius: var(--radius);
      font-family: var(--font-display);
      font-size: 1rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      cursor: pointer;
      transition: background 0.18s, transform 0.1s;
    }
    .btn-generate:hover { background: var(--navy); }
    .btn-generate:active { transform: scale(0.99); }

    /* ── BULK ── */
    .bulk-list {
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
    }
    .bulk-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 0.6rem 0.9rem;
    }
    .bulk-item span {
      font-family: var(--font-display);
      font-size: 1.2rem;
      color: var(--navy);
      word-break: break-all;
      flex: 1;
      margin-right: 0.75rem;
    }
    .bulk-copy {
      flex-shrink: 0;
      background: none;
      border: none;
      cursor: pointer;
      color: var(--text-2);
      opacity: 0.4;
      padding: 0.2rem;
      transition: opacity 0.18s, color 0.18s;
    }
    .bulk-copy:hover { opacity: 1; color: var(--blue); }
    .bulk-copy svg { width: 0.9rem; height: 0.9rem; }

    .bulk-controls {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 1rem;
    }
    .bulk-count-wrap {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 1.2rem;
      color: var(--text-2);
    }
    .bulk-count-wrap input[type="number"] {
      width: 4rem;
      padding: 0.35rem 0.5rem;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      font-family: var(--font-display);
      font-size: 1rem;
      color: var(--navy);
      background: var(--bg);
      outline: none;
      text-align: center;
    }
    .btn-copy-all {
      font-family: var(--font-display);
      font-size: 1rem;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      padding: 0.4rem 0.9rem;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      background: var(--card-bg);
      color: var(--text-2);
      cursor: pointer;
      transition: all 0.18s;
    }
    .btn-copy-all:hover { border-color: var(--blue); color: var(--blue); }

    /* toast */
    .toast {
      position: fixed;
      bottom: 2rem;
      left: 50%;
      transform: translateX(-50%) translateY(4rem);
      background: var(--navy);
      color: white;
      font-family: var(--font-display);
      font-size: 0.75rem;
      letter-spacing: 0.08em;
      padding: 0.6rem 1.25rem;
      border-radius: 999px;
      opacity: 0;
      transition: all 0.25s;
      pointer-events: none;
      z-index: 999;
    }
    .toast.show {
      opacity: 1;
      transform: translateX(-50%) translateY(0);
    }

    /* ── FOOTER ── */
    footer {
      padding: 2rem;
      text-align: center;
      font-size: 0.8rem;
      color: var(--text-2);
      opacity: 0.4;
      border-top: 1px solid var(--border);
    }
    footer a { color: var(--navy); text-decoration: none; margin: 0 0.75rem; }
    footer a:hover { color: var(--blue); }

    @media (max-width: 600px) {
      .tool-wrap, .page-header, .breadcrumb { padding-left: 1.25rem; padding-right: 1.25rem; }
      header { padding: 0 1.25rem; }
    }