/* ==========================================================================
   Design System Tokens - Precision Drafting / Industrial Brutalism
   ========================================================================== */

@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 100 900;
    font-display: swap;
    src: url('/assets/fonts/Inter-Variable.woff2') format('woff2');
}

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

:root {
    /* Color Palette */
    --color-bg: #f4f4f0; /* Paper / Blueprint Off-White */
    --color-surface: #ffffff; /* True White */
    --color-surface-dark: #e8e8e2; /* Draft Grey */
    --color-text-primary: #111111; /* Carbon Black */
    --color-text-secondary: #4a4a4a; /* Graphite */
    --color-accent: #0a2463; /* Blueprint Blue */
    --color-highlight: #ff5a00; /* Safety/Warning Orange */
    --color-border: #d0d0c8;
    --color-border-dark: #111111;

    /* Typography */
    --font-display: 'Inter', system-ui, -apple-system, sans-serif;
    --font-body: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'Space Mono', monospace;

    /* Spacing Scale (8px base) */
    --space-1: 0.25rem;  /* 4px */
    --space-2: 0.5rem;   /* 8px */
    --space-3: 1rem;     /* 16px */
    --space-4: 1.5rem;   /* 24px */
    --space-5: 2rem;     /* 32px */
    --space-6: 3rem;     /* 48px */
    --space-8: 4rem;     /* 64px */
    --space-12: 6rem;    /* 96px */
    --space-16: 8rem;    /* 128px */
    --space-24: 12rem;   /* 192px */

    /* Type Scale */
    --text-xs: 0.75rem;   /* 12px */
    --text-sm: 0.875rem;  /* 14px */
    --text-base: 1rem;    /* 16px */
    --text-lg: 1.125rem;  /* 18px */
    --text-xl: 1.25rem;   /* 20px */
    --text-2xl: 1.5rem;   /* 24px */
    --text-3xl: 2rem;     /* 32px */
    --text-4xl: 2.5rem;   /* 40px */
    --text-5xl: 3.5rem;   /* 56px */
    --text-6xl: 4.5rem;   /* 72px */
    --text-8xl: 6rem;     /* 96px */
    --text-9xl: 8rem;     /* 128px */

    /* Container */
    --container-width: 1440px;
    --container-padding: 2rem;

    /* Layout */
    --border-radius: 0; /* Brutalist sharp edges */
    --border-width: 2px;
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

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

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style-position: inside;
}

table {
    width: 100%;
    border-collapse: collapse;
}

button {
    font: inherit;
    color: inherit;
    background: transparent;
    border: none;
    cursor: pointer;
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-4);
    text-wrap: balance;
}

h1 { font-size: var(--text-6xl); }
h2 { font-size: var(--text-5xl); }
h3 { font-size: var(--text-4xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }

p {
    margin-bottom: var(--space-4);
    max-width: 70ch;
}

.mono {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.lead {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    font-weight: 400;
}

.label {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-secondary);
    display: block;
    margin-bottom: var(--space-2);
}

/* ==========================================================================
   Layout & Grid
   ========================================================================== */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

.grid {
    display: grid;
    gap: var(--space-8);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

section {
    padding: var(--space-16) 0;
    border-bottom: var(--border-width) solid var(--color-border-dark);
}

/* ==========================================================================
   Components
   ========================================================================== */
/* Button */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    background-color: var(--color-text-primary);
    color: var(--color-bg);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: var(--text-base);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: var(--border-width) solid var(--color-text-primary);
    transition: all 0.2s ease;
    text-decoration: none;
}

.btn:hover {
    background-color: var(--color-highlight);
    color: var(--color-text-primary);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-text-primary);
}

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

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-bg);
    border-bottom: var(--border-width) solid var(--color-border-dark);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-display);
    font-weight: 800;
    font-size: var(--text-lg);
    letter-spacing: -0.02em;
    text-transform: uppercase;
}

.site-nav {
    display: flex;
    gap: var(--space-6);
}

.site-nav a {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color 0.2s ease;
}

.site-nav a:hover,
.site-nav a.active {
    color: var(--color-text-primary);
}

.site-nav a.active {
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 4px;
}

.btn-preorder {
    background-color: var(--color-highlight);
    color: var(--color-text-primary);
    padding: var(--space-2) var(--space-4);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    font-weight: 700;
    text-transform: uppercase;
    border: var(--border-width) solid var(--color-text-primary);
    transition: all 0.2s ease;
}

.btn-preorder:hover {
    background-color: var(--color-text-primary);
    color: var(--color-highlight);
}

/* Footer */
.site-footer {
    background-color: var(--color-text-primary);
    color: var(--color-surface);
    padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-8);
}

.footer-brand p {
    color: #888;
    margin-top: var(--space-4);
    font-size: var(--text-sm);
}

.footer-links h4 {
    color: var(--color-bg);
    font-size: var(--text-base);
    margin-bottom: var(--space-4);
    font-family: var(--font-mono);
    text-transform: uppercase;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-2);
}

.footer-links a {
    color: #888;
    font-size: var(--text-sm);
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--color-highlight);
}

/* Data Table */
.data-table {
    width: 100%;
    margin-bottom: var(--space-8);
    border: var(--border-width) solid var(--color-border-dark);
}

.data-table th,
.data-table td {
    padding: var(--space-4);
    border: var(--border-width) solid var(--color-border-dark);
    text-align: left;
}

.data-table th {
    background-color: var(--color-surface-dark);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    text-transform: uppercase;
}

/* Tools Component */
.tool-container {
    background-color: var(--color-surface);
    border: var(--border-width) solid var(--color-border-dark);
    padding: var(--space-8);
    margin-bottom: var(--space-8);
}

.tool-controls {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.tool-input-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

input[type="range"],
input[type="number"],
select {
    padding: var(--space-2);
    border: var(--border-width) solid var(--color-border-dark);
    font-family: var(--font-mono);
    background: var(--color-bg);
}

.tool-output {
    background: var(--color-text-primary);
    color: var(--color-bg);
    padding: var(--space-6);
    font-family: var(--font-mono);
}

/* Responsive */
@media (max-width: 1024px) {
    :root {
        --text-6xl: 3.5rem;
        --text-8xl: 4.5rem;
        --text-9xl: 5rem;
    }

    .grid-4, .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .header-inner {
        flex-wrap: wrap;
        height: auto;
        padding: var(--space-4) 0;
        gap: var(--space-4);
    }

    .site-nav {
        order: 3;
        width: 100%;
        overflow-x: auto;
        padding-bottom: var(--space-2);
    }

    .grid-2 {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }
}