/* ============================================
   Kobumura — Design System
   Complete component library. Every visual
   property is defined here — no utility
   classes in markup.
   ============================================ */

/* ── Reset ─────────────────────────────────── */

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

html {
    scroll-behavior: smooth;
    -moz-tab-size: 4;
    tab-size: 4;
}

body {
    background-color: #0a0f0f;
    color: #d1d5db;
    font-family: 'Inter', ui-sans-serif, system-ui, sans-serif;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

button, input, select, textarea {
    font: inherit;
    color: inherit;
}

button {
    background: none;
    border: none;
    cursor: pointer;
}

ul, ol {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: inherit;
    font-weight: inherit;
}

.hidden {
    display: none;
}

/* ── Base ──────────────────────────────────── */

/* ── Logo ──────────────────────────────────── */

.logo {
    height: 3rem;
    width: auto;
}

.logo-link {
    display: flex;
    align-items: center;
    transition: opacity 0.3s ease;
}

.logo-link:hover {
    opacity: 0.8;
}

.logo-text {
    fill: #fff;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 1px;
}

/* ── Navigation ────────────────────────────── */

.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background-color: rgba(10, 15, 15, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-bar.nav-scrolled {
    background-color: rgba(10, 15, 15, 0.95);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 5rem;
}

.nav-desktop {
    display: none;
    align-items: center;
    gap: 2.5rem;
}

@media (min-width: 768px) {
    .nav-desktop {
        display: flex;
    }
}

.nav-icon {
    width: 1.5rem;
    height: 1.5rem;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: color 0.3s ease;
    color: #9ca3af;
}

.nav-link:hover {
    color: #fff;
}

.nav-link-active {
    color: #73E8FF;
}

.nav-link-active:hover {
    color: #73E8FF;
}

.mobile-menu {
    background-color: rgba(17, 26, 27, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
}

@media (min-width: 768px) {
    .mobile-menu {
        display: none;
    }
}

.mobile-menu-toggle {
    color: #9ca3af;
    transition: color 0.3s ease;
}

.mobile-menu-toggle:hover {
    color: #fff;
}

@media (min-width: 768px) {
    .mobile-menu-toggle {
        display: none;
    }
}

.mobile-nav-link + .mobile-nav-link {
    margin-top: 1rem;
}

.mobile-nav-link {
    display: block;
    font-size: 1.125rem;
    font-weight: 500;
    transition: color 0.3s ease;
    color: #9ca3af;
}

.mobile-nav-link:hover {
    color: #fff;
}

/* ── Layout ────────────────────────────────── */

.page-width {
    max-width: 80rem;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

@media (min-width: 1024px) {
    .page-width {
        padding-left: 2rem;
        padding-right: 2rem;
    }
}

.page-width-article {
    max-width: 56rem;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

@media (min-width: 1024px) {
    .page-width-article {
        padding-left: 2rem;
        padding-right: 2rem;
    }
}

.page-width-sm {
    max-width: 48rem;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

@media (min-width: 1024px) {
    .page-width-sm {
        padding-left: 2rem;
        padding-right: 2rem;
    }
}

.page-header {
    padding-top: 8rem;
    padding-bottom: 4rem;
}

@media (min-width: 768px) {
    .page-header {
        padding-top: 10rem;
        padding-bottom: 5rem;
    }
}

.section-padding {
    padding-top: 5rem;
    padding-bottom: 5rem;
}

@media (min-width: 768px) {
    .section-padding {
        padding-top: 7rem;
        padding-bottom: 7rem;
    }
}

/* ── Headings ──────────────────────────────── */

.heading-page {
    font-size: 2.25rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.025em;
    margin-bottom: 1.5rem;
}

@media (min-width: 640px) {
    .heading-page {
        font-size: 3rem;
    }
}

@media (min-width: 1024px) {
    .heading-page {
        font-size: 4.5rem;
    }
}

.heading-section {
    font-size: 1.875rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.025em;
    margin-bottom: 1.5rem;
}

@media (min-width: 640px) {
    .heading-section {
        font-size: 2.25rem;
    }
}

@media (min-width: 1024px) {
    .heading-section {
        font-size: 3rem;
    }
}

/* ── Footer ────────────────────────────────── */

.footer-link {
    color: #6b7280;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: #73E8FF;
}

.footer-heading {
    color: #fff;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

/* ── Scroll Reveal ──────────────────────────── */

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ── Gradient Utilities ─────────────────────── */

.gradient-text {
    background: linear-gradient(135deg, #73E8FF 0%, #917AFF 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient-radial {
    background: radial-gradient(ellipse at 50% 0%, rgba(115, 232, 255, 0.06) 0%, transparent 60%);
}

.bg-gradient-radial-purple {
    background: radial-gradient(ellipse at 50% 100%, rgba(145, 122, 255, 0.05) 0%, transparent 60%);
}

.gradient-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(115, 232, 255, 0.3), rgba(145, 122, 255, 0.3), transparent);
}

/* ── Buttons ───────────────────────────────── */

.btn,
.btn-primary,
.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: #73E8FF;
    color: #0a0f0f;
}

.btn-primary:hover {
    background-color: #917AFF;
    color: #fff;
}

.btn-outline {
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
}

.btn-outline:hover {
    border-color: rgba(115, 232, 255, 0.3);
    color: #73E8FF;
}

/* ── Section Labels ────────────────────────── */

.section-label,
.section-label-purple {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: 1.5rem;
}

.section-label {
    color: #73E8FF;
}

.section-label-purple {
    color: #917AFF;
}

/* ── Cards ─────────────────────────────────── */

.card,
.card-sm,
.card-lg {
    display: block;
    border-radius: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    background-color: rgba(17, 26, 27, 0.5);
}

.card {
    padding: 2rem;
}

.card-sm {
    padding: 1.5rem;
}

.card-lg {
    padding: 2.5rem;
}

/* ── Badges ────────────────────────────────── */

.badge-cyan,
.badge-purple,
.badge-green {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 9999px;
    border: 1px solid;
}

.badge-cyan {
    background-color: rgba(115, 232, 255, 0.1);
    color: #73E8FF;
    border-color: rgba(115, 232, 255, 0.2);
}

.badge-purple {
    background-color: rgba(145, 122, 255, 0.1);
    color: #917AFF;
    border-color: rgba(145, 122, 255, 0.2);
}

.badge-green {
    background-color: rgba(34, 197, 94, 0.1);
    color: #4ade80;
    border-color: rgba(34, 197, 94, 0.2);
}

/* ── Icons ─────────────────────────────────── */

.icon-cyan {
    width: 1.25rem;
    height: 1.25rem;
    color: #73E8FF;
}

.icon-purple {
    width: 1.25rem;
    height: 1.25rem;
    color: #917AFF;
}

.card .icon-cyan,
.card .icon-purple {
    width: 1.5rem;
    height: 1.5rem;
}

.icon-btn {
    width: 1rem;
    height: 1rem;
    margin-left: 0.5rem;
}

/* ── Icon Boxes ────────────────────────────── */

.icon-box-cyan,
.icon-box-purple {
    width: 3rem;
    height: 3rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.icon-box-cyan {
    background-color: rgba(115, 232, 255, 0.1);
}

.icon-box-purple {
    background-color: rgba(145, 122, 255, 0.1);
}

/* ── Form Elements ─────────────────────────── */

.form-label {
    display: block;
    font-size: 0.875rem;
    color: #9ca3af;
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    background-color: #111a1b;
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
    transition: border-color 0.3s ease;
}

.form-input::placeholder {
    color: #4b5563;
}

.form-input:focus {
    border-color: rgba(115, 232, 255, 0.5);
    outline: none;
}

/* ── Hover Effects ──────────────────────────── */

.card-hover {
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.card-hover:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: rgba(115, 232, 255, 0.2);
}

.card .icon-box-cyan,
.card .icon-box-purple {
    margin-bottom: 1.5rem;
}

.card .prose-body,
.card-sm .prose-body {
    font-size: 0.875rem;
}

.card-lg .prose-body {
    font-size: 1rem;
}

.card .badge-group,
.card-sm .badge-group,
.card-lg .badge-group {
    margin-bottom: 1.5rem;
}

.card .badge-list,
.card-sm .badge-list,
.card-lg .badge-list {
    margin-top: 1.5rem;
}

.btn-glow:hover {
    box-shadow: 0 0 30px rgba(115, 232, 255, 0.25);
}

.tech-badge {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    color: #9ca3af;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 0.5rem;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.tech-badge:hover {
    background-color: rgba(115, 232, 255, 0.1);
    border-color: rgba(115, 232, 255, 0.3);
    color: #73E8FF;
}

/* ── Glow Effects ───────────────────────────── */

.glow-cyan {
    box-shadow: 0 0 40px rgba(115, 232, 255, 0.15);
}

.glow-purple {
    box-shadow: 0 0 40px rgba(145, 122, 255, 0.15);
}

/* ── Scrollbar ──────────────────────────────── */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #0a0f0f;
}

::-webkit-scrollbar-thumb {
    background: #1e2d2f;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #2a3d3f;
}

/* ── Article Prose ─────────────────────────── */

.article-prose {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: #9ca3af;
}

.article-prose h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: #fff;
    margin-top: 3rem;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.article-prose h3 {
    font-size: 1.375rem;
    font-weight: 600;
    color: #fff;
    margin-top: 2.5rem;
    margin-bottom: 0.75rem;
}

.article-prose h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: #e5e7eb;
    margin-top: 2rem;
    margin-bottom: 0.5rem;
}

.article-prose p {
    margin-bottom: 1.25rem;
}

.article-prose a {
    color: #73E8FF;
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color 0.3s ease;
}

.article-prose a:hover {
    color: #917AFF;
}

.article-prose strong {
    color: #fff;
    font-weight: 600;
}

.article-prose em {
    font-style: italic;
}

.article-prose ul,
.article-prose ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
}

.article-prose ul {
    list-style-type: disc;
}

.article-prose ol {
    list-style-type: decimal;
}

.article-prose li {
    margin-bottom: 0.375rem;
}

.article-prose li > ul,
.article-prose li > ol {
    margin-top: 0.375rem;
    margin-bottom: 0;
}

.article-prose code {
    background: rgba(115, 232, 255, 0.08);
    color: #73E8FF;
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    font-size: 0.875em;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

.article-prose pre {
    background: #111a1b;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 0.75rem;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
    overflow-x: auto;
}

.article-prose pre code {
    background: none;
    color: #d1d5db;
    padding: 0;
    border-radius: 0;
    font-size: 0.8125rem;
    line-height: 1.7;
}

.article-prose blockquote {
    border-left: 3px solid #73E8FF;
    padding: 0.75rem 1.25rem;
    margin-bottom: 1.5rem;
    background: rgba(115, 232, 255, 0.03);
    border-radius: 0 0.5rem 0.5rem 0;
}

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

.article-prose table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
}

.article-prose thead th {
    background: #111a1b;
    color: #fff;
    font-weight: 600;
    text-align: left;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.article-prose tbody td {
    padding: 0.625rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.article-prose tbody tr:hover {
    background: rgba(115, 232, 255, 0.02);
}

.article-prose hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(115, 232, 255, 0.3), rgba(145, 122, 255, 0.3), transparent);
    margin: 2.5rem 0;
}

.article-prose img {
    max-width: 100%;
    border-radius: 0.75rem;
    margin: 1.5rem auto;
    display: block;
}

.article-prose > *:first-child {
    margin-top: 0;
}

/* ── Headings (extended) ──────────────────── */

.heading-hero {
    font-size: 3rem;
    font-weight: 700;
    color: #fff;
    line-height: 1.05;
    letter-spacing: -0.025em;
    margin-bottom: 2rem;
}

@media (min-width: 640px) {
    .heading-hero {
        font-size: 3.75rem;
    }
}

@media (min-width: 1024px) {
    .heading-hero {
        font-size: 6rem;
    }
}

.heading-subsection {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 2rem;
}

.heading-article {
    font-size: 1.875rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.025em;
    line-height: 1.1;
}

@media (min-width: 640px) {
    .heading-article {
        font-size: 2.25rem;
    }
}

@media (min-width: 1024px) {
    .heading-article {
        font-size: 3rem;
    }
}

/* ── Card Headings ────────────────────────── */

.h3-card,
.h3-card-xl,
.h3-card-2xl {
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.75rem;
}

.h3-card {
    font-size: 1.125rem;
}

.h3-card-xl {
    font-size: 1.25rem;
}

.h3-card-2xl {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* ── Body Text ────────────────────────────── */

.prose-body {
    color: #9ca3af;
    line-height: 1.625;
}

/* ── Links ─────────────────────────────────── */

.link-back {
    color: #73E8FF;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.link-back:hover {
    color: #fff;
}

.link-hover-cyan {
    color: #9ca3af;
    transition: color 0.3s ease;
}

.link-hover-cyan:hover {
    color: #73E8FF;
}

/* ── Badge Containers ─────────────────────── */

.badge-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.badge-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* ── Tags ──────────────────────────────────── */

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 9999px;
    background-color: rgba(10, 15, 15, 0.5);
    color: #6b7280;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* ── Tech Stack Item ──────────────────────── */

.tech-stack-item {
    padding: 1rem;
    border-radius: 0.75rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    background-color: rgba(17, 26, 27, 0.3);
    text-align: center;
}

/* ── Hero ──────────────────────────────────── */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 5rem;
}

.hero > .page-width {
    padding-top: 6rem;
    padding-bottom: 6rem;
}

@media (min-width: 768px) {
    .hero > .page-width {
        padding-top: 8rem;
        padding-bottom: 8rem;
    }
}

/* ── Section Padding Variant ──────────────── */

.section-padding-sm {
    padding-top: 4rem;
    padding-bottom: 4rem;
}

@media (min-width: 768px) {
    .section-padding-sm {
        padding-top: 5rem;
        padding-bottom: 5rem;
    }
}

/* ── Card Badge Row ───────────────────────── */

.card-badge-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

/* ── Contact ──────────────────────────────── */

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

/* ── Article ──────────────────────────────── */

.article-header {
    padding-top: 8rem;
    padding-bottom: 2rem;
}

@media (min-width: 768px) {
    .article-header {
        padding-top: 10rem;
        padding-bottom: 3rem;
    }
}

.article-body {
    padding-top: 3rem;
    padding-bottom: 4rem;
}

@media (min-width: 768px) {
    .article-body {
        padding-top: 4rem;
        padding-bottom: 4rem;
    }
}

/* ── Footer ───────────────────────────────── */

.footer {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.footer-description {
    margin-top: 1rem;
    color: #6b7280;
    font-size: 0.875rem;
    line-height: 1.625;
    max-width: 20rem;
}

.footer-nav-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-bottom {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

@media (min-width: 640px) {
    .footer-bottom {
        flex-direction: row;
    }
}

.footer-copyright {
    color: #4b5563;
    font-size: 0.875rem;
}

.footer-meta {
    color: #374151;
    font-size: 0.75rem;
}

/* ── Group Hover ──────────────────────────── */

.group-hover-cyan {
    transition: color 0.3s ease;
}

.group:hover .group-hover-cyan {
    color: #73E8FF;
}

/* ── Hero Content ─────────────────────────── */

.hero-content {
    max-width: 56rem;
}

.hero-identity {
    color: #9ca3af;
    line-height: 1.625;
    max-width: 42rem;
    margin-bottom: 1rem;
}

.hero-lead {
    color: #9ca3af;
    line-height: 1.625;
    font-size: 1.125rem;
    max-width: 42rem;
    margin-bottom: 3rem;
}

@media (min-width: 640px) {
    .hero-lead {
        font-size: 1.25rem;
    }
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

/* ── Section Intro ────────────────────────── */

.section-intro {
    text-align: center;
    margin-bottom: 5rem;
}

.section-intro .heading-section,
.section-title-row .heading-section {
    margin-bottom: 0;
}

.section-header {
    margin-bottom: 4rem;
}

.section-title-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.section-desc {
    color: #9ca3af;
    line-height: 1.625;
    font-size: 1.125rem;
    max-width: 48rem;
}

.page-header-desc {
    color: #9ca3af;
    line-height: 1.625;
    font-size: 1.125rem;
    max-width: 42rem;
}

.section-more {
    text-align: center;
    margin-top: 3rem;
}

/* ── CTA Sections ─────────────────────────── */

.cta-content {
    text-align: center;
}

.cta-description {
    color: #9ca3af;
    line-height: 1.625;
    font-size: 1.125rem;
    margin-bottom: 2.5rem;
    max-width: 36rem;
    margin-left: auto;
    margin-right: auto;
}

/* ── Grid Layouts ─────────────────────────── */

.grid-proof {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .grid-proof {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .grid-proof {
        grid-template-columns: repeat(3, 1fr);
    }
}

.grid-2col {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .grid-2col {
        grid-template-columns: repeat(2, 1fr);
    }
}

.grid-3col {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .grid-3col {
        grid-template-columns: repeat(3, 1fr);
    }
}

.grid-2col-lg {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 1024px) {
    .grid-2col-lg {
        grid-template-columns: repeat(2, 1fr);
    }
}

.grid-2col-centered {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    max-width: 56rem;
    margin-left: auto;
    margin-right: auto;
}

@media (min-width: 768px) {
    .grid-2col-centered {
        grid-template-columns: repeat(2, 1fr);
    }
}

.grid-tech-stack {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    max-width: 56rem;
    margin-left: auto;
    margin-right: auto;
}

@media (min-width: 640px) {
    .grid-tech-stack {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .grid-tech-stack {
        grid-template-columns: repeat(4, 1fr);
    }
}

.grid-series-nav {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 640px) {
    .grid-series-nav {
        grid-template-columns: repeat(2, 1fr);
    }
}

.content-split {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
    align-items: start;
}

@media (min-width: 1024px) {
    .content-split {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ── Contact ─────────────────────────────── */

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-heading {
    color: #fff;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.contact-note {
    color: #4b5563;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* ── Form ─────────────────────────────────── */

.form-stack {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

textarea.form-input {
    resize: none;
}

.btn-full {
    width: 100%;
}

/* ── About ────────────────────────────────── */

.prose-stack {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.text-accent {
    color: #fff;
    font-weight: 500;
}

.tech-stack-name {
    color: #fff;
    font-weight: 500;
    font-size: 0.875rem;
}

.tech-stack-category {
    color: #4b5563;
    font-size: 0.75rem;
    margin-top: 0.25rem;
}

/* ── Article (extended) ──────────────────── */

.article-meta {
    margin-top: 2rem;
}

.series-nav-label {
    font-size: 0.75rem;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.series-nav-title {
    color: #fff;
    font-weight: 600;
}

.series-nav-next {
    text-align: right;
}

/* ── Error ────────────────────────────────── */

.error-content {
    text-align: center;
}

.heading-error {
    font-size: 2.25rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.025em;
    margin-bottom: 1.5rem;
}

@media (min-width: 640px) {
    .heading-error {
        font-size: 3rem;
    }
}

/* ── Misc ───────────────────────────────────── */

a:focus-visible,
button:focus-visible {
    outline: 2px solid #73E8FF;
    outline-offset: 2px;
    border-radius: 2px;
}

::selection {
    background: rgba(115, 232, 255, 0.2);
    color: #fff;
}