:root {
    --bg: #fafafa;
    --surface: #fff;
    --surface-2: #f2f2f0;
    --text: #101010;
    --muted: #666;
    --line: #e6e6e3;
    --accent: #111;
    --radius: 28px;
    --max: 1180px;
    --ease: cubic-bezier(.16, 1, .3, 1);
    --shadow: 0 24px 80px rgba(0, 0, 0, .08)
}

[data-theme=dark] {
    --bg: #0d0d0d;
    --surface: #151515;
    --surface-2: #1b1b1b;
    --text: #f5f5f2;
    --muted: #a2a2a0;
    --line: #292929;
    --accent: #f5f5f2;
    --shadow: 0 24px 80px rgba(0, 0, 0, .28)
}

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

html {
    scroll-behavior: smooth
}

body {
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility
}

a {
    color: inherit
}

button,
input {
    font: inherit
}

.container {
    width: min(var(--max), calc(100% - 48px));
    margin: auto
}

.site-nav {
    position: fixed;
    inset: 16px 0 auto;
    z-index: 100
}

.nav-shell {
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 10px 0 18px;
    background: color-mix(in srgb, var(--surface) 82%, transparent);
    border: 1px solid color-mix(in srgb, var(--line) 80%, transparent);
    backdrop-filter: blur(18px);
    border-radius: 999px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, .05)
}

.logo {
    text-decoration: none;
    font-weight: 700;
    letter-spacing: -.04em
}

.logo span {
    color: var(--muted);
    font-weight: 500
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 26px
}

.nav-links a {
    font-size: 13px;
    text-decoration: none;
    color: var(--muted);
    transition: .35s var(--ease)
}

.nav-links a:hover,
.nav-links a[aria-current=page] {
    color: var(--text)
}

.theme-toggle,
.menu-toggle {
    border: 1px solid var(--line);
    background: transparent;
    color: var(--text);
    border-radius: 999px;
    padding: 9px 13px;
    cursor: pointer;
    transition: .35s var(--ease)
}

.theme-toggle:hover,
.menu-toggle:hover {
    background: var(--text);
    color: var(--bg)
}

.menu-toggle {
    display: none
}

.hero {
    min-height: 100svh;
    display: flex;
    align-items: flex-end;
    padding: 160px 0 110px;
    overflow: hidden
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.25fr .75fr;
    gap: 64px;
    align-items: end
}

.eyebrow {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .18em;
    color: var(--muted);
    margin-bottom: 26px
}

.hero h1 {
    font-size: clamp(58px, 8.4vw, 124px);
    line-height: .91;
    letter-spacing: -.075em;
    max-width: 1050px
}

.hero h1 em {
    font-style: normal;
    color: var(--muted)
}

.hero-copy {
    max-width: 430px;
    color: var(--muted);
    font-size: 17px;
    line-height: 1.75
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 34px
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    border: 1px solid var(--text);
    background: var(--text);
    color: var(--bg);
    text-decoration: none;
    padding: 13px 18px;
    border-radius: 999px;
    font-size: 13px;
    transition: .5s var(--ease)
}

.btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 30px rgba(0, 0, 0, .12)
}

.btn.ghost {
    background: transparent;
    color: var(--text);
    border-color: var(--line)
}

.btn.ghost:hover {
    background: var(--surface-2);
    box-shadow: none
}

.availability {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-size: 12px;
    margin-top: 30px
}

.dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #54a86b;
    box-shadow: 0 0 0 5px color-mix(in srgb, #54a86b 15%, transparent)
}

.section {
    padding: 130px 0
}

.section-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 32px;
    margin-bottom: 48px
}

.section-label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .18em;
    color: var(--muted)
}

.section-title {
    font-size: clamp(34px, 5vw, 68px);
    letter-spacing: -.06em;
    line-height: 1;
    max-width: 720px
}

.section-intro {
    max-width: 430px;
    color: var(--muted)
}

.project-list {
    display: grid;
    gap: 90px
}

.project-card {
    display: block;
    text-decoration: none
}

.project-media {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    background: var(--surface-2);
    aspect-ratio: 16/9;
    border: 1px solid var(--line)
}

.project-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 1s var(--ease)
}

.project-card:hover .project-media img {
    transform: scale(1.045)
}

.project-overlay {
    position: absolute;
    inset: auto 20px 20px auto;
    opacity: 0;
    transform: translateY(12px);
    transition: .5s var(--ease)
}

.project-card:hover .project-overlay {
    opacity: 1;
    transform: none
}

.project-info {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 24px;
    padding-top: 22px
}

.project-title {
    font-size: 28px;
    letter-spacing: -.035em
}

.project-desc {
    color: var(--muted);
    max-width: 650px;
    margin-top: 8px
}

.tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-content: start;
    justify-content: flex-end
}

.tag {
    border: 1px solid var(--line);
    padding: 7px 11px;
    border-radius: 999px;
    font-size: 11px;
    color: var(--muted);
    white-space: nowrap
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid var(--line)
}

.service {
    padding: 28px 26px 30px 0;
    border-bottom: 1px solid var(--line);
    min-height: 260px
}

.service+.service {
    padding-left: 26px;
    border-left: 1px solid var(--line)
}

.service-number {
    font: 12px ui-monospace, monospace;
    color: var(--muted)
}

.service h3 {
    font-size: 24px;
    margin: 64px 0 14px;
    letter-spacing: -.03em
}

.service p {
    color: var(--muted);
    max-width: 330px
}

.about-grid {
    display: grid;
    grid-template-columns: .85fr 1.15fr;
    gap: 80px;
    align-items: center
}

.portrait {
    aspect-ratio: 1;
    border-radius: 50%;
    overflow: hidden;
    background: var(--surface-2);
    border: 1px solid var(--line)
}

.portrait img {
    width: 100%;
    height: 100%;
    object-fit: cover
}

.about-copy h2 {
    font-size: clamp(38px, 5vw, 68px);
    line-height: .98;
    letter-spacing: -.06em;
    margin-bottom: 28px
}

.about-copy p {
    color: var(--muted);
    font-size: 17px;
    line-height: 1.75;
    max-width: 680px;
    margin-bottom: 18px
}

.stats {
    display: flex;
    gap: 44px;
    margin: 34px 0
}

.stat strong {
    display: block;
    font-size: 30px;
    letter-spacing: -.04em
}

.stat span {
    font-size: 12px;
    color: var(--muted)
}

.cta-band {
    padding: 90px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line)
}

.cta-band-inner {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 40px
}

.cta-band h2 {
    font-size: clamp(42px, 6vw, 84px);
    letter-spacing: -.07em;
    line-height: .92;
    max-width: 750px
}

.cta-band p {
    color: var(--muted);
    max-width: 320px
}

.page-hero {
    padding: 190px 0 90px
}

.page-hero h1 {
    font-size: clamp(58px, 8vw, 110px);
    letter-spacing: -.075em;
    line-height: .92;
    max-width: 1000px
}

.page-hero .sub {
    color: var(--muted);
    max-width: 620px;
    font-size: 18px;
    margin-top: 28px;
    line-height: 1.7
}

.process {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    border-top: 1px solid var(--line)
}

.process-step {
    padding: 28px 20px 20px 0;
    min-height: 250px
}

.process-step+.process-step {
    border-left: 1px solid var(--line);
    padding-left: 20px
}

.process-step .num {
    font: 12px ui-monospace, monospace;
    color: var(--muted)
}

.process-step h3 {
    margin: 62px 0 12px;
    font-size: 20px
}

.process-step p {
    color: var(--muted);
    font-size: 14px
}

.case-hero {
    padding: 180px 0 70px
}

.case-meta {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin: 28px 0
}

.case-hero h1 {
    font-size: clamp(56px, 8vw, 110px);
    line-height: .92;
    letter-spacing: -.075em;
    max-width: 1000px
}

.case-hero p {
    max-width: 680px;
    color: var(--muted);
    font-size: 18px;
    line-height: 1.75;
    margin-top: 26px
}

.case-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 30px
}

.case-cover {
    width: 100%;
    aspect-ratio: 16/9;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--surface-2);
    border: 1px solid var(--line)
}

.case-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover
}

.case-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 80px;
    padding: 100px 0
}

.case-toc {
    position: sticky;
    top: 110px;
    height: max-content
}

.case-toc a {
    display: block;
    color: var(--muted);
    text-decoration: none;
    font-size: 12px;
    margin-bottom: 13px
}

.case-toc a:hover {
    color: var(--text)
}

.case-content {
    max-width: 760px
}

.case-section {
    padding-bottom: 90px
}

.case-section h2 {
    font-size: clamp(32px, 4vw, 52px);
    line-height: 1;
    letter-spacing: -.055em;
    margin-bottom: 22px
}

.case-section h3 {
    font-size: 23px;
    margin: 36px 0 12px
}

.case-section p,
.case-section li {
    color: var(--muted);
    font-size: 16px;
    line-height: 1.85
}

.case-section ul {
    padding-left: 20px
}

.case-visual {
    margin: 32px 0;
    padding: 30px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface-2);
    min-height: 180px
}

.concept-note {
    display: inline-flex;
    padding: 7px 10px;
    border-radius: 999px;
    border: 1px solid var(--line);
    font-size: 11px;
    color: var(--muted);
    margin-bottom: 22px
}

.meta-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    margin: 50px 0
}

.meta-item {
    padding: 24px 16px 24px 0
}

.meta-item+.meta-item {
    border-left: 1px solid var(--line);
    padding-left: 16px
}

.meta-item span {
    display: block;
    color: var(--muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .12em;
    margin-bottom: 8px
}

.meta-item strong {
    font-size: 16px
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 22px
}

.featured-post {
    grid-column: 1/-1;
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: 0;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden
}

.post-visual {
    min-height: 380px;
    background: linear-gradient(135deg, var(--surface-2), var(--bg));
    display: grid;
    place-items: center;
    font-size: 13px;
    color: var(--muted)
}

.post-body {
    padding: 48px
}

.post-body h2 {
    font-size: clamp(34px, 4vw, 58px);
    letter-spacing: -.055em;
    line-height: 1;
    margin: 14px 0
}

.post-body p {
    color: var(--muted);
    line-height: 1.75
}

.post-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 30px;
    text-decoration: none;
    transition: .5s var(--ease)
}

.post-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow)
}

.post-card .post-index {
    font: 12px ui-monospace, monospace;
    color: var(--muted)
}

.post-card h3 {
    font-size: 27px;
    letter-spacing: -.035em;
    margin: 60px 0 14px
}

.post-card p {
    color: var(--muted);
    line-height: 1.7
}

.post-meta {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    color: var(--muted);
    font-size: 11px
}

.filter-bar {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin: 44px 0
}

.filter-btn {
    border: 1px solid var(--line);
    background: transparent;
    color: var(--muted);
    padding: 9px 13px;
    border-radius: 999px;
    cursor: pointer;
    font-size: 12px
}

.filter-btn.active,
.filter-btn:hover {
    background: var(--text);
    border-color: var(--text);
    color: var(--bg)
}

.article {
    max-width: 820px;
    margin: auto
}

.article-header {
    padding: 180px 0 70px
}

.article-header h1 {
    font-size: clamp(52px, 7vw, 90px);
    line-height: .95;
    letter-spacing: -.07em
}

.article-header .lede {
    font-size: 20px;
    color: var(--muted);
    line-height: 1.7;
    margin-top: 26px
}

.article-content {
    font-size: 17px
}

.article-content h2 {
    font-size: 38px;
    letter-spacing: -.05em;
    line-height: 1;
    margin: 80px 0 20px
}

.article-content p {
    color: var(--muted);
    line-height: 1.9;
    margin: 0 0 20px
}

.article-content blockquote {
    border-left: 2px solid var(--text);
    padding: 20px 0 20px 24px;
    margin: 40px 0;
    font-size: 20px;
    line-height: 1.6
}

.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--text);
    z-index: 200
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr .7fr;
    gap: 90px
}

.contact-grid h2 {
    font-size: clamp(42px, 6vw, 80px);
    line-height: .95;
    letter-spacing: -.07em
}

.contact-links {
    display: grid;
    gap: 14px
}

.contact-link {
    padding: 20px 0;
    border-bottom: 1px solid var(--line);
    text-decoration: none;
    display: flex;
    justify-content: space-between;
    gap: 20px
}

.contact-link span {
    color: var(--muted);
    font-size: 13px
}

footer {
    padding: 70px 0 30px
}

.footer-top {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    padding: 36px 0;
    border-top: 1px solid var(--line)
}

.footer-top h2 {
    font-size: 30px;
    letter-spacing: -.04em
}

.footer-links {
    display: flex;
    gap: 22px;
    flex-wrap: wrap
}

.footer-links a {
    color: var(--muted);
    font-size: 13px;
    text-decoration: none
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    color: var(--muted);
    font-size: 11px;
    padding-top: 18px
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 8px
}

.reveal {
    opacity: 0;
    transform: translateY(34px);
    transition: opacity .9s var(--ease), transform .9s var(--ease);
    will-change: opacity, transform
}

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

.reveal.delay-1 {
    transition-delay: .08s
}

.reveal.delay-2 {
    transition-delay: .16s
}

.reveal.delay-3 {
    transition-delay: .24s
}

.cursor-glow {
    position: fixed;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    pointer-events: none;
    background: radial-gradient(circle, color-mix(in srgb, var(--text) 5%, transparent), transparent 68%);
    transform: translate(-50%, -50%);
    z-index: -1
}

.page-transition {
    position: fixed;
    inset: 0;
    background: var(--text);
    transform: translateY(100%);
    z-index: 300;
    pointer-events: none;
    transition: transform .65s var(--ease)
}

.page-transition.active {
    transform: translateY(0)
}

@media(max-width:900px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        padding: 14px;
        background: var(--surface);
        border: 1px solid var(--line);
        border-radius: 24px;
        flex-direction: column;
        align-items: stretch
    }

    .nav-links.open {
        display: flex
    }

    .nav-links a {
        padding: 10px 8px
    }

    .theme-toggle {
        margin-top: 4px
    }

    .menu-toggle {
        display: block
    }

    .hero {
        padding-top: 150px
    }

    .hero-grid,
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr
    }

    .hero-grid {
        gap: 48px
    }

    .service-grid {
        grid-template-columns: 1fr
    }

    .service+.service {
        padding-left: 0;
        border-left: 0
    }

    .process {
        grid-template-columns: 1fr 1fr
    }

    .process-step+.process-step {
        border-left: 0;
        padding-left: 0
    }

    .case-layout {
        grid-template-columns: 1fr;
        gap: 35px
    }

    .case-toc {
        position: static;
        display: flex;
        gap: 14px;
        overflow: auto
    }

    .case-toc a {
        white-space: nowrap
    }

    .meta-grid {
        grid-template-columns: 1fr 1fr
    }

    .meta-item:nth-child(odd) {
        border-left: 0;
        padding-left: 0
    }

    .featured-post {
        grid-template-columns: 1fr
    }

    .post-visual {
        min-height: 260px
    }

    .footer-top {
        flex-direction: column
    }
}

@media(max-width:600px) {
    .container {
        width: min(var(--max), calc(100% - 32px))
    }

    .site-nav {
        inset: 10px 0 auto
    }

    .nav-shell {
        height: 58px
    }

    .hero {
        padding: 130px 0 70px
    }

    .section {
        padding: 90px 0
    }

    .section-head {
        display: block
    }

    .section-intro {
        margin-top: 18px
    }

    .project-list {
        gap: 60px
    }

    .project-info {
        grid-template-columns: 1fr
    }

    .tags {
        justify-content: flex-start
    }

    .project-title {
        font-size: 24px
    }

    .service {
        min-height: 0;
        padding: 24px 0
    }

    .service h3 {
        margin-top: 45px
    }

    .process {
        grid-template-columns: 1fr
    }

    .process-step {
        min-height: 0;
        padding: 24px 0
    }

    .process-step+.process-step {
        border-top: 1px solid var(--line);
        padding: 24px 0
    }

    .case-hero {
        padding-top: 140px
    }

    .case-layout {
        padding: 60px 0
    }

    .meta-grid {
        grid-template-columns: 1fr
    }

    .meta-item+.meta-item {
        border-left: 0;
        border-top: 1px solid var(--line);
        padding-left: 0
    }

    .blog-grid {
        grid-template-columns: 1fr
    }

    .featured-post {
        grid-column: auto
    }

    .post-body {
        padding: 30px
    }

    .post-card h3 {
        margin-top: 40px
    }

    .article-header {
        padding-top: 140px
    }

    .stats {
        gap: 24px;
        flex-wrap: wrap
    }

    .cta-band-inner {
        display: block
    }

    .cta-band p {
        margin-top: 24px
    }

    .footer-bottom {
        display: block
    }

    .footer-bottom span {
        display: block;
        margin-top: 8px
    }
}

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

    .reveal {
        opacity: 1;
        transform: none;
        transition: none
    }

    .project-media img,
    .btn,
    .post-card {
        transition: none
    }

    .page-transition {
        display: none
    }
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 30px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.form-group label {
  font-size: 13px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.form-input, .form-textarea {
  width: 100%;
  padding: 14px 18px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 14px;
  color: var(--text);
  outline: none;
  transition: border-color 0.3s var(--ease);
}
.form-input:focus, .form-textarea:focus {
  border-color: var(--text);
}
.form-textarea {
  min-height: 140px;
  resize: vertical;
}
.form-alert {
  padding: 14px 18px;
  border-radius: 12px;
  font-size: 14px;
  margin-bottom: 20px;
}
.form-alert.success {
  background: color-mix(in srgb, #54a86b 15%, transparent);
  border: 1px solid #54a86b;
  color: var(--text);
}
.form-alert.error {
  background: color-mix(in srgb, #e05353 15%, transparent);
  border: 1px solid #e05353;
  color: var(--text);
}@media (max-width: 900px) {
  /* تنظیم تمام‌عرض بودن متن معرفی پروژه‌ها */
  .case-hero p,
  .project-desc,
  .hero-copy,
  .section-intro {
    max-width: 100% !important;
  }

  /* تنظیم اطلاعات کارت و تگ‌ها در موبایل */
  .project-info {
    grid-template-columns: 1fr !important;
    gap: 16px !important;
  }

  .tags {
    justify-content: flex-start !important;
  }

  /* در صورتی که بالای کیس‌استادی تگ‌ها کنار تایتل قرار می‌گیرند */
  .case-meta {
    flex-wrap: wrap;
    gap: 8px;
    margin: 18px 0;
  }
}
@media (max-width: 900px) {
  /* تنظیم تمام‌عرض بودن متن معرفی پروژه‌ها */
  .case-hero p,
  .project-desc,
  .hero-copy,
  .section-intro {
    max-width: 100% !important;
  }

  /* تنظیم اطلاعات کارت و تگ‌ها در موبایل */
  .project-info {
    grid-template-columns: 1fr !important;
    gap: 16px !important;
  }

  .tags {
    justify-content: flex-start !important;
  }

  /* در صورتی که بالای کیس‌استادی تگ‌ها کنار تایتل قرار می‌گیرند */
  .case-meta {
    flex-wrap: wrap;
    gap: 8px;
    margin: 18px 0;
  }
}