:root {
    /* Palette: High contrast, technical, brutalist */
    --color-bg: #F4F4F2; /* Off-white / Newsprint */
    --color-text: #1A1A1A; /* Graphite Black */
    --color-accent: #D32F2F; /* Clinical Red */
    --color-accent-hover: #B71C1C;
    --color-border: #E0E0DF;
    --color-bg-dark: #1A1A1A;
    --color-text-light: #F4F4F2;
    --color-success: #2E7D32; /* Deep Green */
    --color-warning: #F57C00;

    /* Typography */
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'DM Sans', sans-serif;

    /* Spacing & Sizes */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 1rem;
    --space-4: 1.5rem;
    --space-5: 2rem;
    --space-6: 3rem;
    --space-8: 4rem;
    --space-12: 6rem;
    --space-16: 8rem;
    --space-32: 16rem;

    /* Structural */
    --max-width: 1200px;
    --header-height: 4rem;
    --border-radius: 2px; /* Very sharp, non-AI */
    --border-width: 1px;
}

/* Base resets & fonts */
@font-face {
    font-family: 'Space Grotesk';
    src: url('/assets/fonts/SpaceGrotesk-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Space Grotesk';
    src: url('/assets/fonts/SpaceGrotesk-Bold.woff2') format('woff2');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'DM Sans';
    src: url('/assets/fonts/DMSans-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'DM Sans';
    src: url('/assets/fonts/DMSans-Bold.woff2') format('woff2');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

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

body {
    margin: 0;
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    margin-top: 0;
    margin-bottom: var(--space-4);
    line-height: 1.1;
    letter-spacing: -0.02em;
}

a {
    color: inherit;
    text-decoration: underline;
    text-decoration-color: var(--color-accent);
    text-decoration-thickness: 2px;
    text-underline-offset: 4px;
    transition: all 0.2s ease;
}

a:hover {
    color: var(--color-accent);
    background-color: rgba(211, 47, 47, 0.1);
}

img, svg {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

@media (min-width: 768px) {
    .grid-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
    .grid-4 { grid-template-columns: repeat(4, 1fr); }
    .grid-sidebar { grid-template-columns: 250px 1fr; }
}

.section {
    padding: var(--space-12) 0;
    border-bottom: var(--border-width) solid var(--color-border);
}

.bg-dark {
    background-color: var(--color-bg-dark);
    color: var(--color-text-light);
}

.bg-dark h1, .bg-dark h2, .bg-dark h3, .bg-dark h4 {
    color: var(--color-text-light);
}

/* Header & Nav */
.site-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    border-bottom: var(--border-width) solid var(--color-text);
    position: sticky;
    top: 0;
    background-color: var(--color-bg);
    z-index: 100;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.logo:hover {
    background-color: transparent;
    color: var(--color-accent);
}

.main-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: var(--space-4);
}

.main-nav a {
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-2) 0;
}

.main-nav a[aria-current="page"] {
    border-bottom: 2px solid var(--color-accent);
    color: var(--color-accent);
}

/* Footer */
.site-footer {
    padding: var(--space-12) 0;
    background-color: var(--color-bg-dark);
    color: var(--color-text-light);
    font-size: 0.875rem;
}

.site-footer a {
    color: var(--color-text-light);
    text-decoration-color: var(--color-border);
}

/* Tools & Forms */
.tool-card {
    border: var(--border-width) solid var(--color-text);
    padding: var(--space-6);
    background-color: #FFF;
    border-radius: var(--border-radius);
    box-shadow: 4px 4px 0 var(--color-text);
}

.form-group {
    margin-bottom: var(--space-4);
}

.form-label {
    display: block;
    font-family: var(--font-display);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.form-input {
    width: 100%;
    padding: var(--space-3);
    border: var(--border-width) solid var(--color-text);
    font-family: var(--font-body);
    font-size: 1rem;
    border-radius: var(--border-radius);
    background-color: var(--color-bg);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 2px rgba(211, 47, 47, 0.2);
}

.btn {
    display: inline-block;
    padding: var(--space-3) var(--space-6);
    background-color: var(--color-text);
    color: var(--color-bg);
    font-family: var(--font-display);
    font-weight: 700;
    text-decoration: none;
    text-transform: uppercase;
    border: none;
    cursor: pointer;
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
}

.btn:hover {
    background-color: var(--color-accent);
    color: #fff;
}

.btn-outline {
    background-color: transparent;
    color: var(--color-text);
    border: var(--border-width) solid var(--color-text);
}

.btn-outline:hover {
    background-color: var(--color-text);
    color: var(--color-bg);
}

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-6) 0;
    font-size: 0.875rem;
}

.data-table th, .data-table td {
    padding: var(--space-3);
    border: var(--border-width) solid var(--color-border);
    text-align: left;
}

.data-table th {
    background-color: rgba(0,0,0,0.05);
    font-family: var(--font-display);
    font-weight: 700;
}

/* Motif */
.motif-line {
    width: 100%;
    height: 1px;
    background-color: var(--color-text);
    margin: var(--space-8) 0;
}

.motif-block {
    display: inline-block;
    width: var(--space-4);
    height: var(--space-4);
    background-color: var(--color-accent);
    margin-right: var(--space-3);
}

/* Helpers */
.text-accent { color: var(--color-accent); }
.text-display { font-family: var(--font-display); }
.text-xl { font-size: clamp(2rem, 5vw, 4rem); line-height: 1; }
.text-lg { font-size: clamp(1.5rem, 3vw, 2.5rem); }
.text-sm { font-size: 0.875rem; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-8 { margin-bottom: var(--space-8); }
.pb-0 { padding-bottom: 0; }

.noscript-warning {
    background-color: var(--color-warning);
    color: #fff;
    padding: var(--space-4);
    font-weight: 700;
    margin-bottom: var(--space-4);
    border-radius: var(--border-radius);
}