/**
 * Minimal Theme Styles
 * Ultra-clean, typography-focused design
 * Breathes with whitespace
 */

/* ============================================
   CSS Custom Properties
   Monochromatic palette with subtle accent
   ============================================ */
:root {
    /* Colors - stark and clean */
    --c-bg: #ffffff;
    --c-bg-alt: #fafafa;
    --c-text: #111111;
    --c-text-secondary: #666666;
    --c-text-tertiary: #999999;
    --c-border: #e5e5e5;
    --c-border-light: #f0f0f0;
    --c-accent: #111111;
    --c-accent-hover: #333333;

    /* Typography - refined scale */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;

    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px */
    --text-base: 1.125rem;   /* 18px */
    --text-lg: 1.25rem;      /* 20px */
    --text-xl: 1.5rem;       /* 24px */
    --text-2xl: 2rem;        /* 32px */
    --text-3xl: 2.5rem;      /* 40px */
    --text-4xl: 3rem;        /* 48px */

    --leading-tight: 1.2;
    --leading-normal: 1.7;
    --leading-relaxed: 1.8;

    --tracking-tight: -0.02em;
    --tracking-normal: 0;
    --tracking-wide: 0.05em;

    /* Spacing - generous whitespace */
    --space-1: 0.25rem;      /* 4px */
    --space-2: 0.5rem;       /* 8px */
    --space-3: 0.75rem;      /* 12px */
    --space-4: 1rem;         /* 16px */
    --space-5: 1.5rem;       /* 24px */
    --space-6: 2rem;         /* 32px */
    --space-8: 3rem;         /* 48px */
    --space-10: 4rem;        /* 64px */
    --space-12: 5rem;        /* 80px */
    --space-16: 8rem;        /* 128px */

    /* Layout */
    --width-content: 680px;
    --width-wide: 1100px;
    --width-full: 100%;

    --header-height: 80px;

    /* Transitions - subtle and smooth */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --duration-fast: 150ms;
    --duration-normal: 300ms;
}

/* Dark mode - inverted with care */
[data-theme="dark"] {
    --c-bg: #0a0a0a;
    --c-bg-alt: #141414;
    --c-text: #f0f0f0;
    --c-text-secondary: #a0a0a0;
    --c-text-tertiary: #666666;
    --c-border: #222222;
    --c-border-light: #1a1a1a;
    --c-accent: #f0f0f0;
    --c-accent-hover: #cccccc;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--c-text);
    background-color: var(--c-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

::selection {
    background: var(--c-text);
    color: var(--c-bg);
}

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

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

button, input, textarea, select {
    font: inherit;
    color: inherit;
    background: none;
    border: none;
    outline: none;
}

button {
    cursor: pointer;
}

ul, ol {
    list-style: none;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: var(--leading-tight);
    letter-spacing: var(--tracking-tight);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
    margin-bottom: 1.5em;
}

strong {
    font-weight: 600;
}

em {
    font-style: italic;
}

small {
    font-size: var(--text-sm);
}

/* ============================================
   Layout
   ============================================ */
.container {
    width: 100%;
    max-width: var(--width-content);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-5);
    padding-right: var(--space-5);
}

.container--wide {
    max-width: var(--width-wide);
}

.site-main {
    min-height: calc(100vh - var(--header-height));
}

/* ============================================
   Header - Ultra minimal
   ============================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
    background-color: var(--c-bg);
    border-bottom: 1px solid var(--c-border-light);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--width-wide);
    margin: 0 auto;
    padding: 0 var(--space-5);
}

.site-logo {
    font-size: var(--text-lg);
    font-weight: 700;
    letter-spacing: var(--tracking-tight);
    color: var(--c-text);
    transition: opacity var(--duration-fast) var(--ease-out);
}

.site-logo:hover {
    opacity: 0.6;
}

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

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

.nav__link {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--c-text-secondary);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    transition: color var(--duration-fast) var(--ease-out);
}

.nav__link:hover {
    color: var(--c-text);
}

.nav__link--active {
    color: var(--c-text);
}

/* Header actions */
.header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--c-text-secondary);
    transition: color var(--duration-fast) var(--ease-out);
}

.btn-icon:hover {
    color: var(--c-text);
}

.btn-icon svg {
    width: 20px;
    height: 20px;
}

.btn-menu {
    display: none;
}

/* Theme toggle icons */
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="light"] .icon-sun,
:root:not([data-theme]) .icon-sun { display: none; }
[data-theme="light"] .icon-moon,
:root:not([data-theme]) .icon-moon { display: block; }

/* ============================================
   Reading Progress Bar
   ============================================ */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--c-text);
    z-index: 101;
    transition: width 50ms linear;
}

/* ============================================
   Search Modal
   ============================================ */
.search-modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 20vh;
    background-color: rgba(0, 0, 0, 0.8);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--duration-normal) var(--ease-out),
                visibility var(--duration-normal) var(--ease-out);
}

.search-modal.is-active {
    opacity: 1;
    visibility: visible;
}

.search-modal__inner {
    width: 100%;
    max-width: 560px;
    padding: var(--space-5);
}

.search-modal__form {
    position: relative;
}

.search-modal__input {
    width: 100%;
    padding: var(--space-5);
    font-size: var(--text-xl);
    background-color: var(--c-bg);
    border: 2px solid transparent;
    transition: border-color var(--duration-fast) var(--ease-out);
}

.search-modal__input:focus {
    border-color: var(--c-text);
}

.search-modal__input::placeholder {
    color: var(--c-text-tertiary);
}

.search-modal__close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    font-size: var(--text-2xl);
    color: var(--c-text-tertiary);
    transition: color var(--duration-fast) var(--ease-out);
}

.search-modal__close:hover {
    color: var(--c-text);
}

/* ============================================
   Homepage
   ============================================ */
.home-intro {
    padding: var(--space-16) 0 var(--space-12);
    text-align: center;
}

.home-intro__title {
    font-size: var(--text-3xl);
    font-weight: 400;
    letter-spacing: var(--tracking-tight);
    margin-bottom: var(--space-4);
}

.home-intro__desc {
    font-size: var(--text-lg);
    color: var(--c-text-secondary);
    max-width: 480px;
    margin: 0 auto;
}

/* Posts List - Clean and focused */
.posts-section {
    padding: var(--space-10) 0 var(--space-16);
}

.posts-list {
    display: flex;
    flex-direction: column;
}

/* ============================================
   Post Card - Text-focused minimal design
   ============================================ */
.post-card {
    display: block;
    padding: var(--space-8) 0;
    border-bottom: 1px solid var(--c-border-light);
    transition: opacity var(--duration-fast) var(--ease-out);
}

.post-card:first-child {
    border-top: 1px solid var(--c-border-light);
}

.post-card:hover {
    opacity: 0.7;
}

.post-card__meta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-3);
}

.post-card__date {
    font-size: var(--text-sm);
    color: var(--c-text-tertiary);
    font-variant-numeric: tabular-nums;
}

.post-card__category {
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--c-text-secondary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.post-card__title {
    font-size: var(--text-2xl);
    font-weight: 600;
    line-height: var(--leading-tight);
    margin-bottom: var(--space-3);
    transition: color var(--duration-fast) var(--ease-out);
}

.post-card:hover .post-card__title {
    color: var(--c-text-secondary);
}

.post-card__excerpt {
    font-size: var(--text-base);
    color: var(--c-text-secondary);
    line-height: var(--leading-relaxed);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-card__footer {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-top: var(--space-4);
}

.post-card__reading-time {
    font-size: var(--text-sm);
    color: var(--c-text-tertiary);
}

/* Featured Post - Larger emphasis */
.post-card--featured {
    padding: var(--space-10) 0;
}

.post-card--featured .post-card__title {
    font-size: var(--text-3xl);
}

/* Post Card with Image */
.post-card--with-image {
    display: grid;
    grid-template-columns: 1fr 200px;
    gap: var(--space-6);
    align-items: center;
}

.post-card__image {
    aspect-ratio: 4/3;
    overflow: hidden;
}

.post-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    transition: filter var(--duration-normal) var(--ease-out);
}

.post-card:hover .post-card__image img {
    filter: grayscale(0%);
}

/* ============================================
   Single Post - Reading focused
   ============================================ */
.single-post {
    padding-bottom: var(--space-16);
}

.post-header {
    padding: var(--space-16) 0 var(--space-10);
    text-align: center;
}

.post-header__category {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--c-text-secondary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    margin-bottom: var(--space-5);
}

.post-header__title {
    font-size: var(--text-4xl);
    font-weight: 700;
    line-height: 1.1;
    max-width: 800px;
    margin: 0 auto var(--space-6);
}

.post-header__meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-5);
    color: var(--c-text-secondary);
    font-size: var(--text-sm);
}

.post-header__author {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.post-header__avatar {
    width: 40px;
    height: 40px;
    object-fit: cover;
    filter: grayscale(100%);
}

.post-header__author-name {
    font-weight: 500;
    color: var(--c-text);
}

.post-header__separator {
    color: var(--c-border);
}

/* Featured Image */
.post-featured-image {
    margin-bottom: var(--space-10);
}

.post-featured-image img {
    width: 100%;
    max-width: var(--width-wide);
    margin: 0 auto;
}

/* Post Content - Typography perfection */
.post-content {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
}

.post-content > * {
    max-width: var(--width-content);
    margin-left: auto;
    margin-right: auto;
}

.post-content h2 {
    font-size: var(--text-2xl);
    margin-top: 3em;
    margin-bottom: 0.75em;
}

.post-content h3 {
    font-size: var(--text-xl);
    margin-top: 2.5em;
    margin-bottom: 0.5em;
}

.post-content h4 {
    font-size: var(--text-lg);
    margin-top: 2em;
    margin-bottom: 0.5em;
}

.post-content p {
    margin-bottom: 1.75em;
}

.post-content a {
    color: var(--c-text);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
    transition: opacity var(--duration-fast) var(--ease-out);
}

.post-content a:hover {
    opacity: 0.6;
}

.post-content ul,
.post-content ol {
    margin-bottom: 1.75em;
    padding-left: 1.5em;
}

.post-content ul {
    list-style-type: disc;
}

.post-content ol {
    list-style-type: decimal;
}

.post-content li {
    margin-bottom: 0.5em;
}

.post-content li::marker {
    color: var(--c-text-tertiary);
}

.post-content blockquote {
    margin: 2.5em 0;
    padding: var(--space-6) var(--space-8);
    border-left: 3px solid var(--c-text);
    background-color: var(--c-bg-alt);
    font-size: var(--text-lg);
    font-style: italic;
    color: var(--c-text-secondary);
}

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

.post-content pre {
    margin: 2.5em auto;
    padding: var(--space-6);
    background-color: var(--c-bg-alt);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    line-height: 1.6;
}

.post-content code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background-color: var(--c-bg-alt);
    padding: 0.2em 0.4em;
}

.post-content pre code {
    background: none;
    padding: 0;
}

.post-content img {
    margin: 2.5em auto;
    max-width: var(--width-wide);
}

.post-content figure {
    margin: 2.5em auto;
    max-width: var(--width-wide);
}

.post-content figcaption {
    margin-top: var(--space-3);
    font-size: var(--text-sm);
    color: var(--c-text-tertiary);
    text-align: center;
}

.post-content hr {
    margin: 3em auto;
    border: none;
    border-top: 1px solid var(--c-border);
    max-width: 100px;
}

/* Video Embed */
.video-embed {
    position: relative;
    padding-bottom: 56.25%;
    margin: 2.5em auto;
    max-width: var(--width-wide);
}

.video-embed iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* Post Tags */
.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-10);
    padding-top: var(--space-8);
    border-top: 1px solid var(--c-border-light);
}

.post-tag {
    font-size: var(--text-sm);
    color: var(--c-text-secondary);
    padding: var(--space-2) var(--space-4);
    background-color: var(--c-bg-alt);
    transition: background-color var(--duration-fast) var(--ease-out),
                color var(--duration-fast) var(--ease-out);
}

.post-tag:hover {
    background-color: var(--c-text);
    color: var(--c-bg);
}

/* Author Box */
.author-box {
    display: flex;
    gap: var(--space-6);
    margin-top: var(--space-10);
    padding: var(--space-8);
    background-color: var(--c-bg-alt);
}

.author-box__avatar {
    width: 80px;
    height: 80px;
    flex-shrink: 0;
    object-fit: cover;
    filter: grayscale(100%);
}

.author-box__name {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.author-box__name a:hover {
    opacity: 0.6;
}

.author-box__bio {
    font-size: var(--text-sm);
    color: var(--c-text-secondary);
    line-height: var(--leading-relaxed);
}

/* Share Links */
.post-share {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-top: var(--space-8);
}

.post-share__label {
    font-size: var(--text-sm);
    color: var(--c-text-tertiary);
}

.post-share__link {
    color: var(--c-text-secondary);
    transition: color var(--duration-fast) var(--ease-out);
}

.post-share__link:hover {
    color: var(--c-text);
}

.post-share__link svg {
    width: 18px;
    height: 18px;
}

/* ============================================
   Related Posts
   ============================================ */
.related-posts {
    padding: var(--space-12) 0;
    border-top: 1px solid var(--c-border-light);
}

.related-posts__title {
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--c-text-tertiary);
    margin-bottom: var(--space-8);
}

.related-posts__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
}

.related-post {
    display: block;
    transition: opacity var(--duration-fast) var(--ease-out);
}

.related-post:hover {
    opacity: 0.6;
}

.related-post__title {
    font-size: var(--text-lg);
    font-weight: 600;
    line-height: var(--leading-tight);
    margin-bottom: var(--space-2);
}

.related-post__date {
    font-size: var(--text-sm);
    color: var(--c-text-tertiary);
}

/* ============================================
   Comments Section
   ============================================ */
.comments-section {
    padding: var(--space-12) 0;
    background-color: var(--c-bg-alt);
}

.comments-section__title {
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--c-text-tertiary);
    margin-bottom: var(--space-8);
}

.comments-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

/* Comment */
.comment {
    display: flex;
    gap: var(--space-4);
}

.comment__avatar {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    object-fit: cover;
    filter: grayscale(100%);
}

.comment__avatar-placeholder {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--c-text);
    color: var(--c-bg);
    font-weight: 600;
    font-size: var(--text-sm);
}

.comment__body {
    flex: 1;
}

.comment__header {
    display: flex;
    align-items: baseline;
    gap: var(--space-3);
    margin-bottom: var(--space-2);
}

.comment__author {
    font-weight: 600;
    font-size: var(--text-sm);
}

.comment__date {
    font-size: var(--text-xs);
    color: var(--c-text-tertiary);
}

.comment__content {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--c-text-secondary);
}

.comment__reply-btn {
    margin-top: var(--space-2);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--c-text-tertiary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    transition: color var(--duration-fast) var(--ease-out);
}

.comment__reply-btn:hover {
    color: var(--c-text);
}

.comment__replies {
    margin-top: var(--space-6);
    margin-left: var(--space-10);
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

/* Comment Form */
.comment-form {
    margin-top: var(--space-8);
    padding: var(--space-6);
    background-color: var(--c-bg);
}

.comment-form__title {
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

.comment-form__textarea {
    width: 100%;
    min-height: 120px;
    padding: var(--space-4);
    border: 1px solid var(--c-border);
    resize: vertical;
    transition: border-color var(--duration-fast) var(--ease-out);
}

.comment-form__textarea:focus {
    border-color: var(--c-text);
}

.comment-form__submit {
    margin-top: var(--space-4);
}

.comment-form__login {
    color: var(--c-text-secondary);
    font-size: var(--text-sm);
}

.comment-form__login a {
    color: var(--c-text);
    text-decoration: underline;
}

/* ============================================
   Archive Page
   ============================================ */
.archive-header {
    padding: var(--space-16) 0 var(--space-10);
    text-align: center;
    border-bottom: 1px solid var(--c-border-light);
}

.archive-header__label {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--c-text-tertiary);
    margin-bottom: var(--space-3);
}

.archive-header__title {
    font-size: var(--text-3xl);
    font-weight: 700;
}

.archive-header__count {
    font-size: var(--text-sm);
    color: var(--c-text-tertiary);
    margin-top: var(--space-3);
}

/* ============================================
   Search Page
   ============================================ */
.search-header {
    padding: var(--space-16) 0 var(--space-10);
    text-align: center;
}

.search-header__title {
    font-size: var(--text-2xl);
    font-weight: 400;
    margin-bottom: var(--space-6);
}

.search-header__title strong {
    font-weight: 700;
}

.search-header__form {
    max-width: 400px;
    margin: 0 auto;
}

.search-header__input {
    width: 100%;
    padding: var(--space-4);
    border: 1px solid var(--c-border);
    font-size: var(--text-base);
    text-align: center;
    transition: border-color var(--duration-fast) var(--ease-out);
}

.search-header__input:focus {
    border-color: var(--c-text);
}

.no-results {
    text-align: center;
    padding: var(--space-12) 0;
    color: var(--c-text-secondary);
}

/* ============================================
   Page Template
   ============================================ */
.page-template {
    padding: var(--space-16) 0;
}

.page-header {
    text-align: center;
    margin-bottom: var(--space-10);
}

.page-header__title {
    font-size: var(--text-3xl);
    font-weight: 700;
}

.page-content {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
}

.page-content p {
    margin-bottom: 1.75em;
}

/* ============================================
   404 Page
   ============================================ */
.error-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
    padding: var(--space-12);
}

.error-page__code {
    font-size: 8rem;
    font-weight: 800;
    line-height: 1;
    color: var(--c-border);
}

.error-page__title {
    font-size: var(--text-2xl);
    font-weight: 600;
    margin-top: var(--space-4);
}

.error-page__desc {
    color: var(--c-text-secondary);
    margin-top: var(--space-2);
}

.error-page__link {
    display: inline-block;
    margin-top: var(--space-6);
    font-size: var(--text-sm);
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* ============================================
   Footer - Minimal
   ============================================ */
.site-footer {
    padding: var(--space-10) 0;
    border-top: 1px solid var(--c-border-light);
}

.footer__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--width-wide);
    margin: 0 auto;
    padding: 0 var(--space-5);
}

.footer__copyright {
    font-size: var(--text-sm);
    color: var(--c-text-tertiary);
}

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

.footer__link {
    font-size: var(--text-sm);
    color: var(--c-text-secondary);
    transition: color var(--duration-fast) var(--ease-out);
}

.footer__link:hover {
    color: var(--c-text);
}

/* ============================================
   Sidebar - Optional minimal sidebar
   ============================================ */
.sidebar {
    padding: var(--space-8) 0;
}

.sidebar__section {
    margin-bottom: var(--space-10);
}

.sidebar__title {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--c-text-tertiary);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--c-border-light);
}

.sidebar__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.sidebar__link {
    font-size: var(--text-sm);
    color: var(--c-text-secondary);
    transition: color var(--duration-fast) var(--ease-out);
}

.sidebar__link:hover {
    color: var(--c-text);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: all var(--duration-fast) var(--ease-out);
}

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

.btn--primary:hover {
    opacity: 0.8;
}

.btn--secondary {
    border: 1px solid var(--c-border);
    color: var(--c-text);
}

.btn--secondary:hover {
    border-color: var(--c-text);
}

/* ============================================
   Pagination
   ============================================ */
.pagination {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin-top: var(--space-12);
    padding-top: var(--space-8);
    border-top: 1px solid var(--c-border-light);
}

.pagination ul {
    display: flex;
    gap: var(--space-1);
}

.pagination a,
.pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--space-3);
    font-size: var(--text-sm);
    border: 1px solid var(--c-border);
    transition: all var(--duration-fast) var(--ease-out);
}

.pagination a:hover {
    border-color: var(--c-text);
}

.pagination .active span {
    background-color: var(--c-text);
    border-color: var(--c-text);
    color: var(--c-bg);
}

.pagination .ellipsis span {
    border: none;
    color: var(--c-text-tertiary);
}

/* ============================================
   Utilities
   ============================================ */
.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;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    :root {
        --text-4xl: 2.5rem;
        --text-3xl: 2rem;
    }

    .related-posts__grid {
        grid-template-columns: 1fr;
    }

    .post-card--with-image {
        grid-template-columns: 1fr;
    }

    .post-card__image {
        display: none;
    }
}

@media (max-width: 768px) {
    :root {
        --text-4xl: 2rem;
        --text-3xl: 1.75rem;
        --text-2xl: 1.5rem;
        --space-16: 5rem;
        --space-12: 3rem;
        --space-10: 2.5rem;
    }

    /* Mobile Navigation */
    .nav-primary {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--c-bg);
        padding: var(--space-8) var(--space-5);
        transform: translateX(100%);
        transition: transform var(--duration-normal) var(--ease-out);
        z-index: 99;
    }

    .nav-primary.is-active {
        transform: translateX(0);
    }

    .nav__list {
        flex-direction: column;
        gap: 0;
    }

    .nav__link {
        display: block;
        padding: var(--space-4) 0;
        font-size: var(--text-lg);
        border-bottom: 1px solid var(--c-border-light);
    }

    .btn-menu {
        display: flex;
    }

    /* Post adjustments */
    .post-header {
        padding: var(--space-10) 0 var(--space-8);
    }

    .post-header__meta {
        flex-direction: column;
        gap: var(--space-3);
    }

    .post-header__separator {
        display: none;
    }

    .author-box {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .comment__replies {
        margin-left: var(--space-5);
    }

    /* Footer mobile */
    .footer__inner {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --text-4xl: 1.75rem;
        --text-3xl: 1.5rem;
        --space-5: 1rem;
    }

    .home-intro {
        padding: var(--space-10) 0 var(--space-8);
    }

    .post-card {
        padding: var(--space-6) 0;
    }

    .post-card__title {
        font-size: var(--text-xl);
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .site-header,
    .site-footer,
    .search-modal,
    .reading-progress,
    .post-share,
    .comments-section,
    .related-posts,
    .pagination {
        display: none !important;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
        background: #fff;
    }

    .post-content a {
        text-decoration: underline;
    }

    .post-content a[href]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }
}