/* ======================================================================
   Dark Theme – Modern, Intelligently Minimalist Design
   Author: LayerPress
   ====================================================================== */

/* 1. CSS Variables ----------------------------------------------------- */
/* Local font faces */
@font-face {
    font-family: 'Inter';
    src: url('../fonts/Inter/Inter-200.woff2') format('woff2'),
         url('../fonts/Inter/Inter-200.ttf') format('truetype');
    font-weight: 200;
    font-style: normal;
}
@font-face {
    font-family: 'Inter';
    src: url('../fonts/Inter/Inter-800.woff2') format('woff2'),
         url('../fonts/Inter/Inter-800.ttf') format('truetype');
    font-weight: 800;
    font-style: normal;
}
@font-face {
    font-family: 'Noto Sans JP';
    src: url('../fonts/NotoSansJP/NotoSansJP-200.woff2') format('woff2'),
         url('../fonts/NotoSansJP/NotoSansJP-200.ttf') format('truetype');
    font-weight: 200;
    font-style: normal;
}
@font-face {
    font-family: 'Noto Sans JP';
    src: url('../fonts/NotoSansJP/NotoSansJP-800.woff2') format('woff2'),
         url('../fonts/NotoSansJP/NotoSansJP-800.ttf') format('truetype');
    font-weight: 800;
    font-style: normal;
}
:root {
    /* Colors (Dark Theme) */
    --color-bg: #0e1114;
    --color-bg-contrast: #1c1f23;
    --color-text-primary: #e0e6ed;
    --color-text-secondary: #a8b1c2;
    --color-accent: #4fc3f7;      /* Light Cyan */
    --color-link-hover: #82e0ff;

    /* Typography */
    --font-family-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
                        Roboto, Helvetica, Arial, sans-serif;
    --font-family-jp: "Noto Sans JP", -apple-system, BlinkMacSystemFont,
                      "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

    --font-weight-normal: 200;
    --font-weight-bold: 800;

    /* Spacing */
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;

    /* Breakpoints */
    --breakpoint-sm: 600px;
    --breakpoint-md: 800px;
    --breakpoint-lg: 1200px;
}

/* 2. Base Styles ------------------------------------------------------ */
html {
    scroll-behavior: smooth;
    /*font-size: 100%;*/ /* 16px */
    font-size: 87.5%; /* 14px */
    /*font-size: 75%;*/ /* 12px */
}

body {
    margin: 0;
    padding: var(--spacing-lg);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    font-family: var(--font-family-sans), var(--font-family-jp);
    line-height: 1.8;
    letter-spacing: 0.1rem;
    font-weight: var(--font-weight-normal);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    color: var(--color-text-primary);
    font-weight: var(--font-weight-bold);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease-in-out;
}

a:hover,
a:focus {
    color: var(--color-link-hover);
}

strong {
  font-weight: var(--font-weight-bold);
}

/* Code Blocks */
pre, code {
    background-color: var(--color-bg-contrast);
    color: var(--color-text-secondary);
    font-family: Menlo, Monaco, "Courier New", monospace;
    border-radius: 4px;
}

pre {
    padding: var(--spacing-md);
    overflow-x: auto;
}

/* Lists */
ul, ol {
    margin-bottom: var(--spacing-md);
    padding-left: 1.5rem;
}

li {
    margin-bottom: var(--spacing-sm);
}

/* Blockquotes */
blockquote {
    border-left: 4px solid var(--color-accent);
    padding-left: var(--spacing-md);
    margin-left: 0;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* Images */
img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

/* 3. Layout ----------------------------------------------------------- */
.container {
    max-width: var(--breakpoint-sm);
    margin-left: auto;
    margin-right: auto;
}

/* Grid Utility */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

@media (min-width: var(--breakpoint-sm)) {
    .grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: var(--breakpoint-md)) {
    .grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
}

/* Header / Footer */
header,
footer {
    font-size: var(--spacing-md);
    text-align: center;
    padding: var(--spacing-md) 0;
    margin: 0 auto;
}

header h1,
footer p {
    margin: 0;
    text-align: center;
}

/* Navigation */
nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
}

nav a {
    font-weight: var(--font-weight-bold);
}

/* 4. Utility Classes ----------------------------------------------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mb-md { margin-bottom: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-lg { margin-bottom: var(--spacing-lg); }

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

/* 5. Responsive Typography ------------------------------------------- */
@media (max-width: var(--breakpoint-sm)) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
}

@media (max-width: var(--breakpoint-md)) {
    body { padding: var(--spacing-md); }
}