/* ==========================================================================
   ismat.dev — shared stylesheet
   One design system for every page: tokens, layout, components.
   ========================================================================== */

/* --- Design tokens ------------------------------------------------------ */

:root {
    /* Light only. This also stops browsers on a dark OS from auto-darkening
       form fields and scrollbars on the feed's comment box. */
    color-scheme: light;

    --bg: #ffffff;
    --surface: #fafafa;
    --surface-2: #f4f4f5;
    --text: #18181b;
    --text-body: #3f3f46;
    --muted: #71717a;
    --faint: #a1a1aa;
    --border: rgba(0, 0, 0, 0.08);
    --border-strong: rgba(0, 0, 0, 0.14);
    --accent: #0084ff;
    --accent-hover: #0068cc;
    --accent-soft: rgba(0, 132, 255, 0.08);
    --like: #e0245e;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);

    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Wide shell (header, footer, home hero) with narrower columns for
       anything that is read line by line. */
    --page: 1040px;
    --page-narrow: 720px;
    --page-wide: 880px;
    --gutter: 40px;
    --radius: 10px;
    --radius-lg: 16px;
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Reset -------------------------------------------------------------- */

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    background-color: var(--bg);
    color: var(--text-body);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.2s ease, color 0.2s ease;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: var(--accent);
    text-decoration: none;
}

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

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

svg {
    flex-shrink: 0;
}

h1, h2, h3, h4 {
    color: var(--text);
    line-height: 1.25;
    letter-spacing: -0.02em;
    font-weight: 700;
}

::selection {
    background: var(--accent-soft);
    color: var(--text);
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
}

/* --- Layout ------------------------------------------------------------- */

.container {
    width: 100%;
    max-width: var(--page);
    margin: 0 auto;
    padding: 0 var(--gutter);
}

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

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

main {
    flex: 1;
    width: 100%;
    padding-bottom: 80px;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 8px;
    padding: 10px 16px;
    background: var(--text);
    color: var(--bg);
    border-radius: 8px;
    z-index: 100;
}

.skip-link:focus {
    left: 16px;
    color: var(--bg);
}

/* --- Header / navigation ------------------------------------------------ */

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 28px 0 22px;
}

.brand {
    font-size: 1.375rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
    white-space: nowrap;
}

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

/* Plain text links, flush right — no pills, no boxes. */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 1.75rem;
    list-style: none;
}

.nav-menu a {
    font-size: 1.0625rem;
    font-weight: 400;
    color: var(--muted);
    transition: color 0.15s ease;
}

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

.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--text);
}

.nav-burger {
    display: none;
}

/* --- Buttons ------------------------------------------------------------ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 22px;
    border-radius: 9px;
    font-size: 0.9375rem;
    font-weight: 600;
    border: 1px solid transparent;
    transition: transform 0.2s var(--ease), background-color 0.2s ease,
        border-color 0.2s ease, color 0.2s ease;
}

.btn:active {
    transform: translateY(1px);
}

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

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

.btn-secondary {
    background-color: transparent;
    border-color: var(--border-strong);
    color: var(--text);
}

.btn-secondary:hover {
    background-color: var(--surface-2);
    border-color: var(--border-strong);
    color: var(--text);
}

/* --- Home / hero -------------------------------------------------------- */

/* The home page holds a single block, vertically centred in what is left of
   the viewport once the sticky header and the footer have taken their share. */
main.main-centered {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-bottom: 0;
}

/* Vertical only — `.hero` shares its element with `.container`, so a padding
   shorthand here would wipe out the container's horizontal gutter. */
.hero {
    padding-top: 64px;
    padding-bottom: 64px;
}

.hero-top {
    display: flex;
    align-items: center;
    gap: 26px;
}

.avatar {
    width: 108px;
    height: 108px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    background-color: var(--surface-2);
    box-shadow: 0 0 0 1px var(--border), var(--shadow-md);
    transition: transform 0.35s var(--ease);
}

.avatar:hover {
    transform: scale(1.04);
}

.hero-name {
    font-size: clamp(1.85rem, 6vw, 2.375rem);
    font-weight: 800;
    letter-spacing: -0.035em;
}

.hero-role {
    margin-top: 4px;
    font-size: 1.0625rem;
    color: var(--muted);
}

.hero-bio {
    margin-top: 28px;
    font-size: 1.1875rem;
    line-height: 1.55;
    color: var(--text-body);
    max-width: 34ch;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.socials {
    display: flex;
    gap: 6px;
    margin-top: 14px;
    margin-left: -8px;
}

.socials a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    color: var(--muted);
    transition: color 0.15s ease, background-color 0.15s ease,
        transform 0.2s var(--ease);
}

.socials a:hover {
    color: var(--text);
    background-color: var(--surface-2);
    transform: translateY(-2px);
}

/* --- Section banner ----------------------------------------------------- */

.section-banner {
    background-color: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 36px 0;
    text-align: center;
    margin-bottom: 44px;
}

.section-title {
    font-size: 2.1rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.section-subtitle {
    margin: 12px auto 0;
    padding: 0 var(--gutter);
    font-size: 1.0625rem;
    color: var(--muted);
    max-width: 56ch;
}

/* Page-level actions sitting above the content, e.g. the CV print button. */
.page-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 36px;
}

/* --- Blog index --------------------------------------------------------- */

/* Longhand padding only: `.blog-layout` shares its element with `.container`,
   and a shorthand here would wipe out the container's horizontal gutter. */
.blog-layout {
    display: flex;
    align-items: flex-start;
    gap: 60px;
    padding-bottom: 40px;
}

.posts-column {
    flex: 1;
    min-width: 0;
}

.sidebar-column {
    width: 280px;
    flex-shrink: 0;
}

.sidebar {
    position: sticky;
    top: 84px;
}

.sidebar-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.sidebar-text {
    font-size: 0.9375rem;
    line-height: 1.65;
    color: var(--muted);
}

.year-group + .year-group {
    margin-top: 44px;
}

.year-badge {
    display: inline-block;
    background-color: var(--surface-2);
    color: var(--text);
    font-size: 0.8125rem;
    font-weight: 600;
    padding: 5px 16px;
    border-radius: 999px;
    margin-bottom: 26px;
}

.month-group + .month-group {
    margin-top: 34px;
}

.month-title {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--text);
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 4px;
}

.post-list {
    list-style: none;
}

.post-row {
    display: block;
    padding: 16px 14px;
    margin: 0 -14px;
    border-radius: var(--radius);
    border-bottom: 1px solid var(--border);
    transition: background-color 0.15s ease;
}

.post-row:last-child {
    border-bottom: none;
}

.post-row:hover {
    background-color: var(--surface);
}

.post-row-date {
    font-size: 0.8125rem;
    color: var(--faint);
    margin-bottom: 5px;
}

.post-row-title {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.45;
    transition: color 0.15s ease;
}

.post-row:hover .post-row-title {
    color: var(--accent);
}

.dot::before {
    content: '·';
    margin-right: 8px;
}

/* --- Callout / subscribe card ------------------------------------------- */

.card {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 22px 24px;
}

.card-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.card-text {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--muted);
}

.subscribe-card {
    margin-top: 56px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.subscribe-card .btn {
    flex-shrink: 0;
}

/* --- Article (prose) ---------------------------------------------------- */

.article {
    padding-top: 48px;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--faint);
    margin-bottom: 14px;
}

.article-title {
    font-size: clamp(1.75rem, 5vw, 2.375rem);
    font-weight: 800;
    letter-spacing: -0.035em;
    margin-bottom: 32px;
}

.prose {
    font-size: 1.0625rem;
    line-height: 1.75;
    color: var(--text-body);
}

.prose p {
    margin-bottom: 22px;
}

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

.prose strong {
    color: var(--text);
    font-weight: 650;
}

.prose a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
    text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent);
}

.prose a:hover {
    text-decoration-color: currentColor;
}

.prose h2 {
    font-size: 1.4375rem;
    margin: 40px 0 14px;
}

.prose h3 {
    font-size: 1.1875rem;
    margin: 32px 0 12px;
}

.prose ul,
.prose ol {
    margin: 0 0 22px 1.25rem;
}

.prose li {
    margin-bottom: 8px;
}

.prose blockquote {
    margin: 28px 0;
    padding: 4px 0 4px 20px;
    border-left: 3px solid var(--border-strong);
    color: var(--muted);
    font-style: italic;
}

.prose code {
    font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, monospace;
    font-size: 0.875em;
    background-color: var(--surface-2);
    padding: 0.15em 0.4em;
    border-radius: 5px;
    color: var(--text);
}

.prose pre {
    background-color: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
    overflow-x: auto;
    margin-bottom: 22px;
}

.prose pre code {
    background: none;
    padding: 0;
}

.prose figure {
    margin: 36px 0;
}

.prose figure img {
    width: 100%;
    max-height: 640px;
    object-fit: cover;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.prose figcaption {
    margin-top: 10px;
    font-size: 0.875rem;
    color: var(--faint);
    text-align: center;
}

/* Article footer navigation */
.article-nav {
    margin-top: 56px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    justify-content: space-between;
}

.article-nav-link {
    display: flex;
    flex-direction: column;
    gap: 3px;
    max-width: 46%;
    font-size: 0.9375rem;
}

.article-nav-link.is-next {
    text-align: right;
    margin-left: auto;
}

.article-nav-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--faint);
}

.article-nav-title {
    color: var(--text);
    font-weight: 600;
    line-height: 1.4;
    transition: color 0.15s ease;
}

.article-nav-link:hover .article-nav-title {
    color: var(--accent);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--muted);
    margin-bottom: 28px;
    transition: color 0.15s ease;
}

.back-link:hover {
    color: var(--accent);
}

.back-link svg {
    transition: transform 0.2s var(--ease);
}

.back-link:hover svg {
    transform: translateX(-3px);
}

/* --- CV ----------------------------------------------------------------- */

.cv-section + .cv-section {
    margin-top: 48px;
}

.cv-section-title {
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--faint);
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 24px;
}

.cv-item + .cv-item {
    margin-top: 28px;
}

.cv-item-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 6px 16px;
}

.cv-item-title {
    font-size: 1.0625rem;
    font-weight: 650;
    color: var(--text);
    line-height: 1.4;
}

.cv-item-org {
    font-weight: 500;
    color: var(--muted);
}

.cv-item-period {
    font-size: 0.875rem;
    color: var(--faint);
    white-space: nowrap;
}

.cv-item-desc {
    margin-top: 8px;
    font-size: 0.9375rem;
    line-height: 1.65;
    color: var(--text-body);
}

.cv-item-desc p {
    margin-bottom: 8px;
}

.cv-item-desc p:last-child {
    margin-bottom: 0;
}

.cv-item-desc ul.cv-bullets {
    list-style: disc;
    margin: 6px 0 0 1.15rem;
}

.cv-item-desc ul.cv-bullets li {
    margin-bottom: 6px;
}

.cv-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 10px;
    font-size: 0.875rem;
    font-weight: 500;
}

.cv-link:hover {
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* --- Feed --------------------------------------------------------------- */

.feed-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.feed-card {
    background-color: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 22px 24px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.feed-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-sm);
}

.feed-head {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.feed-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    object-fit: cover;
    background-color: var(--surface-2);
}

.feed-author {
    font-size: 0.9375rem;
    font-weight: 650;
    color: var(--text);
}

.feed-post-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.8125rem;
    color: var(--faint);
    margin-top: 1px;
}

.feed-title {
    font-size: 1.125rem;
    font-weight: 650;
    margin-bottom: 8px;
}

.feed-content {
    font-size: 0.9875rem;
    line-height: 1.7;
    color: var(--text-body);
}

.feed-content p {
    margin-bottom: 12px;
}

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

.feed-image {
    width: 100%;
    max-height: 520px;
    object-fit: cover;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    margin-top: 16px;
}

.feed-actions {
    display: flex;
    gap: 6px;
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}

.feed-action {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 7px 12px;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--muted);
    transition: color 0.15s ease, background-color 0.15s ease;
}

.feed-action:hover {
    background-color: var(--surface-2);
    color: var(--text);
}

.feed-action.is-liked {
    color: var(--like);
}

.feed-action.is-liked svg {
    fill: var(--like);
}

.feed-action svg {
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    transition: transform 0.2s var(--ease);
}

.feed-action:active svg {
    transform: scale(0.85);
}

.comments {
    display: none;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.comments.is-open {
    display: block;
}

.comment {
    padding: 12px 14px;
    background-color: var(--surface);
    border-radius: var(--radius);
    margin-bottom: 10px;
}

.comment-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 4px;
}

.comment-author {
    font-size: 0.875rem;
    font-weight: 650;
    color: var(--text);
}

.comment-date {
    font-size: 0.75rem;
    color: var(--faint);
}

.comment-text {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--text-body);
    white-space: pre-wrap;
}

.comments-empty {
    font-size: 0.9375rem;
    color: var(--faint);
    padding: 4px 0 12px;
}

.comment-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 14px;
}

.field {
    width: 100%;
    padding: 11px 14px;
    font-family: inherit;
    font-size: 0.9375rem;
    color: var(--text);
    background-color: var(--bg);
    border: 1px solid var(--border-strong);
    border-radius: 9px;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.field::placeholder {
    color: var(--faint);
}

.field:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

textarea.field {
    min-height: 88px;
    resize: vertical;
}

.comment-form .btn {
    align-self: flex-start;
}

/* --- Empty state -------------------------------------------------------- */

.empty {
    text-align: center;
    padding: 64px 24px;
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius-lg);
    background-color: var(--surface);
}

.empty svg {
    color: var(--faint);
    margin: 0 auto 16px;
}

.empty h3 {
    font-size: 1.125rem;
    margin-bottom: 8px;
}

.empty p {
    font-size: 0.9375rem;
    color: var(--muted);
    max-width: 42ch;
    margin: 0 auto;
}

/* --- Footer ------------------------------------------------------------- */

.site-footer {
    border-top: 1px solid var(--border);
    padding: 28px 0;
    font-size: 0.875rem;
    color: var(--faint);
}

.footer-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.site-footer a {
    color: var(--faint);
}

.site-footer a:hover {
    color: var(--text);
}

.footer-socials {
    display: flex;
    gap: 14px;
}

/* --- Scroll reveal ------------------------------------------------------ */

[data-reveal] {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

[data-reveal].is-visible {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }

    [data-reveal] {
        opacity: 1;
        transform: none;
    }
}

/* --- Responsive --------------------------------------------------------- */

@media (max-width: 860px) {
    .blog-layout {
        flex-direction: column;
        gap: 40px;
    }

    .sidebar-column {
        width: 100%;
    }

    .sidebar {
        position: static;
    }
}

@media (max-width: 720px) {
    :root {
        --gutter: 20px;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .nav-burger {
        display: inline-flex;
    }

    .site-header {
        position: relative;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        z-index: 40;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 4px var(--gutter) 14px;
        background-color: var(--bg);
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        display: none;
    }

    .nav-menu.is-open {
        display: flex;
    }

    .nav-menu a {
        display: block;
        padding: 12px 0;
        font-size: 1.0625rem;
    }

    .section-banner {
        padding: 26px 0;
        margin-bottom: 32px;
    }

    /* azimjon.com stacks the avatar above the name on narrow screens. */
    .hero-top {
        flex-direction: column;
        align-items: flex-start;
        gap: 18px;
    }

    .avatar {
        width: 84px;
        height: 84px;
    }

    .hero-bio {
        font-size: 1.0625rem;
        max-width: none;
    }

    .feed-card,
    .card {
        padding: 18px;
    }

    .article-nav-link {
        max-width: 100%;
    }

    .article-nav-link.is-next {
        text-align: left;
        margin-left: 0;
    }
}

/* --- Print (CV) --------------------------------------------------------- */

@media print {
    .site-header,
    .site-footer,
    .no-print {
        display: none !important;
    }

    body {
        color: #000;
        background: #fff;
    }

    main {
        padding: 0;
    }

    a {
        color: #000;
        text-decoration: none;
    }
}