/* Modern CSS for redshiftzero's blog */

/* CSS Variables for consistent theming */
:root {
    /* Colors - Inspired by ethereum.org but unique */
    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-primary-light: #e0e7ff;
    --color-bg: #ffffff;
    --color-text: #0f172a;
    --color-text-muted: #475569;
    --color-text-light: #64748b;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-accent: #06b6d4;
    --color-success: #059669;
    --color-warning: #d97706;
    --color-error: #dc2626;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Roboto Mono', Consolas, 'Liberation Mono', Menlo, monospace;
    --font-serif: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Layout */
    --max-width: 1200px;
    --header-height: 4.5rem;
    --border-radius: 0.75rem;
    --border-radius-lg: 1rem;
    --border-radius-xl: 1.5rem;

    /* Shadows */
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #111827;
        --color-text: #f9fafb;
        --color-text-muted: #9ca3af;
        --color-border: #374151;
        --color-border-light: #1f2937;
    }
}

/* Base styles */
* {
    box-sizing: border-box;
}

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

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

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-sans);
    font-weight: 600;
    line-height: 1.25;
    margin: var(--spacing-xl) 0 var(--spacing-md);
    color: var(--color-text);
}

h1 {
    font-size: 2.25rem;
    font-weight: 700;
}

h2 {
    font-size: 1.875rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1.125rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin: var(--spacing-md) 0;
    line-height: 1.7;
}

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

a:hover {
    color: var(--color-primary-hover);
}

/* Code */
code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background-color: var(--color-border-light);
    color: #dc2626;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
}

pre {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    background-color: #1f2937;
    color: #f9fafb;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    overflow-x: auto;
    border: 1px solid var(--color-border);
    margin: var(--spacing-xl) 0;
}

pre code {
    background: none;
    padding: 0;
    color: inherit;
}

/* Images */
img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    margin: var(--spacing-xl) auto;
    display: block;
}

/* Blockquotes */
blockquote {
    border-left: 4px solid var(--color-primary);
    background-color: var(--color-border-light);
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    font-style: italic;
    color: var(--color-text-muted);
}

/* Lists */
ul,
ol {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
}

li {
    margin: var(--spacing-sm) 0;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-xl) 0;
    font-size: 0.875rem;
}

th,
td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

th {
    font-weight: 600;
    background-color: var(--color-border-light);
}

/* Layout */
.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: linear-gradient(135deg, #fef3c7 0%, #fce7f3 25%, #e0e7ff 50%, #dbeafe 75%, #f0f9ff 100%);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    z-index: 100;
    backdrop-filter: blur(8px);
}

.header-wrapper {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.site-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

.brand {
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.2s ease;
}

.brand:hover {
    color: var(--color-primary);
}

/* Navigation */
.nav {
    display: flex;
    align-items: center;
}

.menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-xl);
}

.menu-item a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    position: relative;
}

.menu-item a:hover {
    color: var(--color-primary);
    background-color: var(--color-primary-light);
    transform: translateY(-1px);
}

.menu-item a:active {
    transform: translateY(0);
}

.icon {
    width: 1.25rem;
    height: 1.25rem;
    fill: currentColor;
}

/* Hide mobile navigation checkbox */
#nav-toggle {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    position: absolute !important;
    left: -9999px !important;
    width: 0 !important;
    height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    border: 0 !important;
    clip: rect(0, 0, 0, 0) !important;
}

/* Main content */
.main {
    flex: 1;
    padding-top: calc(var(--header-height) + var(--spacing-2xl));
    padding-bottom: var(--spacing-3xl);
}

.main-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* Post styles */
.post-title {
    font-size: 3rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
    color: var(--color-text);
}

.post-meta {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 1rem;
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-lg);
    background-color: var(--color-bg-secondary);
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--color-primary);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.post-body {
    margin-top: var(--spacing-2xl);
    line-height: 1.8;
    font-size: 1.125rem;
    color: var(--color-text);
}

.post-body p {
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.post-body p:last-child {
    margin-bottom: 0;
}

/* Fix any weird line breaks */
.post-body br {
    display: none;
}

.post-body p br {
    display: inline;
}

.post-body h1,
.post-body h2,
.post-body h3,
.post-body h4,
.post-body h5,
.post-body h6 {
    scroll-margin-top: calc(var(--header-height) + var(--spacing-md));
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
    color: var(--color-text);
}

.post-body h2 {
    font-size: 1.75rem;
}

.post-body h3 {
    font-size: 1.5rem;
}

/* List styles */
.list-item {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: var(--spacing-lg) var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    border-radius: var(--border-radius-lg);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    transition: all 0.2s ease;
}

.list-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.list-item-title {
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    font-size: 1.1rem;
    transition: color 0.2s ease;
}

.list-item-title:hover {
    color: var(--color-primary);
}

.list-item-time {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-3xl);
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-border);
}

.pagination ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-sm);
    align-items: center;
}

.pagination li {
    list-style: none;
    margin: 0;
    padding: 0;
}

.pagination-prev,
.pagination-next {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    color: var(--color-text);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    min-width: 120px;
    text-align: center;
    display: block;
}

.pagination-prev:hover,
.pagination-next:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pagination-prev:active,
.pagination-next:active {
    transform: translateY(0);
}

/* Pagination list and items */
.pagination ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-sm);
    align-items: center;
}

.pagination-item {
    display: flex;
    align-items: center;
    justify-content: center;
}

.pagination-item a,
.pagination-item span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    color: var(--color-text);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.pagination-item a:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pagination-item.current span {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* Footer */
.footer {
    margin-top: auto;
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Back to top */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 50;
}

.back-to-top a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    background-color: var(--color-primary);
    color: white;
    border-radius: 50%;
    text-decoration: none;
    box-shadow: var(--shadow-lg);
    transition: all 0.2s ease;
}

.back-to-top a:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
}

/* Responsive design */
@media (max-width: 768px) {
    :root {
        --max-width: 100%;
    }

    .header-wrapper {
        padding: 0 var(--spacing-md);
    }

    .main-inner {
        padding: 0 var(--spacing-md);
    }

    .post-title {
        font-size: 2rem;
    }

    .menu {
        gap: var(--spacing-md);
    }

    .list-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .pagination {
        flex-direction: row;
        gap: var(--spacing-sm);
        padding: var(--spacing-lg) 0;
        flex-wrap: wrap;
        justify-content: center;
    }

    .pagination ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-sm);
        margin: 0;
    }

    .pagination li.pagination-prev,
    .pagination li.pagination-next {
        min-width: 80px;
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
        touch-action: manipulation;
        white-space: nowrap;
    }

    .pagination li.pagination-prev a,
    .pagination li.pagination-next a {
        min-width: 80px;
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
        touch-action: manipulation;
        white-space: nowrap;
    }

    .pagination li.pagination-item a,
    .pagination li.pagination-item span {
        min-width: 40px;
        height: 40px;
        font-size: 0.9rem;
        touch-action: manipulation;
    }
}

/* Archive page styles */
.archive-list {
    margin-top: var(--spacing-2xl);
    display: grid;
    gap: var(--spacing-md);
}

.archive-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-xl);
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-border-light) 100%);
    border: 1px solid var(--color-border);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.archive-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.archive-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.archive-item:hover::before {
    transform: scaleY(1);
}

.archive-date {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 600;
    min-width: 120px;
    margin-right: var(--spacing-xl);
    flex-shrink: 0;
    text-align: right;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-primary-light);
    border-radius: var(--border-radius);
    font-family: var(--font-mono);
    letter-spacing: 0.5px;
}

.archive-title {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.2s ease;
    flex: 1;
    line-height: 1.4;
    position: relative;
}

.archive-title:hover {
    color: var(--color-primary);
    transform: translateX(4px);
}

/* Archive page header styling */
.page-title {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 3rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

/* Mobile responsive archive */
@media (max-width: 768px) {
    .archive-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .archive-date {
        min-width: auto;
        margin-right: 0;
        text-align: left;
        align-self: flex-start;
    }

    .archive-title {
        font-size: 1rem;
    }

    .page-title {
        font-size: 2.5rem;
    }
}

/* Utility classes */
.text-center {
    text-align: center;
}

.text-muted {
    color: var(--color-text-muted);
}

.mt-0 {
    margin-top: 0;
}

.mt-1 {
    margin-top: var(--spacing-sm);
}

.mt-2 {
    margin-top: var(--spacing-md);
}

.mt-3 {
    margin-top: var(--spacing-lg);
}

.mt-4 {
    margin-top: var(--spacing-xl);
}

.mb-0 {
    margin-bottom: 0;
}

.mb-1 {
    margin-bottom: var(--spacing-sm);
}

.mb-2 {
    margin-bottom: var(--spacing-md);
}

.mb-3 {
    margin-bottom: var(--spacing-lg);
}

.mb-4 {
    margin-bottom: var(--spacing-xl);
}