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

:root {
    
    --black: #050505;
    --white: #f7f6f2;          
    --paper-dim: #ebe9e2;      
    --line: #050505;
    --klein: #1c2adb;         
    --klein-dim: rgba(28, 42, 219, 0.12);
    --klein-ink: #f7f6f2;      
    
    --body: var(--black);
    --surface: var(--black);
    --surface-alt: #0e0e10;
    --border: #2a2a2c;
    --border-soft: #1a1a1c;
    --amber: var(--klein);
    --amber-bright: var(--klein);
    --amber-dim: var(--klein-dim);
    --amber-wash: rgba(28, 42, 219, 0.08);
    --text-primary: var(--white);
    --text-secondary: #a9a9a4;
    --text-muted: #6f6f6a;

    
    --color-bg: var(--black);
    --color-surface: #0e0e10;
    --color-text: var(--white);
    --color-text-muted: #9a9a95;
    --color-border: #26262a;
    --color-accent: var(--klein);
    --color-accent-hover: #4655ff;
    --content-width: 1200px;

    
    --font-display: "Archivo Black", "Helvetica Neue", Arial, sans-serif;
    --font-serif: "Fraunces", "Times New Roman", serif;
    --font-body: "Inter", Arial, Helvetica, sans-serif;
    --font-title: "Archivo Black", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "Space Mono", "JetBrains Mono", monospace;

    
    --shadow-hard: 6px 6px 0 var(--black);
    --shadow-hard-inv: 6px 6px 0 var(--white);
    --shadow-hard-klein: 6px 6px 0 var(--klein);
}

html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        transition-duration: 0.001ms !important;
    }
}

body {
    background-color: var(--black);
    color: var(--text-primary);
    min-height: 100vh;
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.5;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

a.no_underline {
    text-decoration: none;
    color: var(--text-primary);
}

.text-body { font-family: var(--font-body); }
.title-body { font-family: var(--font-title); }


.mono-label {
    font-family: var(--font-mono);
    letter-spacing: 0.06em;
}

::selection {
    background: var(--klein);
    color: var(--klein-ink);
}

:focus-visible {
    outline: 3px solid var(--klein);
    outline-offset: 3px;
}

.ft-weight {
    opacity: 1;
    font-weight: 700 !important;
    color: var(--color-text, var(--white));
    font-style: normal;
}


   
   


.u-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--klein);
}

.u-eyebrow::before {
    content: "";
    width: 8px;
    height: 8px;
    background: var(--klein);
    flex-shrink: 0;
}


.u-hairline {
    border: 0;
    border-top: 1px solid var(--border);
}


.btn-bracket {
    appearance: none;
    background: none;
    border: 0;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-secondary);
    padding: 8px 4px;
    position: relative;
    transition: color 0.12s ease;
}

.btn-bracket::before { content: "["; margin-right: 4px; color: var(--border); }
.btn-bracket::after  { content: "]"; margin-left: 4px; color: var(--border); }

.btn-bracket:hover,
.btn-bracket:focus-visible {
    color: var(--white);
}

.btn-bracket[aria-pressed="true"],
.btn-bracket.is-active {
    color: var(--klein);
}

.btn-bracket[aria-pressed="true"]::before,
.btn-bracket[aria-pressed="true"]::after,
.btn-bracket.is-active::before,
.btn-bracket.is-active::after {
    color: var(--klein);
}


.btn-solid {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 13px 22px;
    background: var(--white);
    color: var(--black);
    border: 1px solid var(--white);
    border-radius: 0;
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-decoration: none;
    transition: background 0.12s ease, color 0.12s ease, transform 0.12s ease;
}

.btn-solid:hover,
.btn-solid:focus-visible {
    background: var(--klein);
    border-color: var(--klein);
    color: var(--klein-ink);
    transform: translate(-2px, -2px);
    box-shadow: var(--shadow-hard-klein);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 22px;
    background: transparent;
    color: var(--white);
    border: 1px solid var(--border);
    border-radius: 0;
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-decoration: none;
    transition: border-color 0.12s ease, color 0.12s ease, transform 0.12s ease;
}

.btn-outline:hover,
.btn-outline:focus-visible {
    border-color: var(--klein);
    color: var(--klein);
    transform: translate(-2px, -2px);
}


.u-arrow::after {
    content: "→";
    display: inline-block;
    margin-left: 8px;
    transition: transform 0.12s ease;
}
a:hover .u-arrow::after,
.btn-solid:hover .u-arrow::after,
.btn-outline:hover .u-arrow::after {
    transform: translateX(4px);
}


.progress-blocks {
    display: flex;
    gap: 3px;
    list-style: none;
}

.progress-blocks li {
    width: 10px;
    height: 14px;
    background: var(--border);
    flex-shrink: 0;
}

.progress-blocks li[data-filled="true"] {
    background: var(--klein);
}

.progress-blocks--done li[data-filled="true"] {
    background: var(--white);
}