@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;450;500;550;600;650;700&family=Manrope:wght@400;500;600;650;700;750;800&display=swap');

/* =========================================================
   01. GLOBAL THEME VARIABLES
   Change these values to adjust the site's overall appearance.
   The light theme overrides these variables further below.
========================================================= */

:root {
    color-scheme: dark;
    --paper: #090e16;
    --panel: #0e1622;
    --surface: #131e2d;
    --foundation: #10293c;
    --ink: #f0f5fc;
    --muted: #9aaac0;
    --line: #243348;
    --green: #25e88a;
    --blue: #72aaff;
    --soft: #152333;
    --dot: #34445c;
    --connector: #405d7e;
    --sans: 'DM Sans', system-ui, sans-serif;
    --display: 'Manrope', system-ui, sans-serif;
}

/* Light theme color overrides */
html[data-theme="light"] {
    color-scheme: light;
    --paper: #f4f7fc;
    --panel: #eaf0f9;
    --surface: #fff;
    --foundation: #10293c;
    --ink: #10233c;
    --muted: #536780;
    --line: #ced9e9;
    --green: #007f52;
    --blue: #155bc0;
    --soft: #e5edf8;
    --dot: #b4c6e0;
    --connector: #8da8cb;
}

/* =========================================================
   02. BASE STYLES AND ACCESSIBILITY
   Controls default typography, spacing, links and focus states.
========================================================= */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font: 16px/1.65 var(--sans);
    -webkit-font-smoothing: antialiased;
}

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

button {
    font: inherit;
    cursor: pointer;
}

a,
button {
    touch-action: manipulation;
}

a:focus-visible,
button:focus-visible {
    outline: 3px solid var(--blue);
    outline-offset: 5px;
}

::selection {
    background: #2b72cb;
    color: white;
}

/* Main page width and horizontal alignment */
.container,
.nav-wrap {
    max-width: 1180px;
    width: calc(100% - 96px);
    margin: auto;
}

/* Keyboard accessibility: skip directly to main content */
.skip {
    position: fixed;
    top: -80px;
    background: var(--ink);
    color: white;
    padding: 12px;
    z-index: 100;
}

.skip:focus {
    top: 10px;
}

/* =========================================================
   03. HEADER AND NAVIGATION
   Controls the sticky top navigation, brand and theme toggle.
========================================================= */

header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
}

.nav-wrap {
    height: 86px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.brand {
    display: flex;
    gap: 13px;
    align-items: center;
    font-size: 14px;
    font-weight: 650;
}

.brand-icon {
    font-family: var(--display);
    background: var(--green);
    color: #071810;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 22px;
    letter-spacing: -2px;
    font-weight: 800;
}

.brand-icon span {
    font-size: 11px;
    margin-left: 3px;
    align-self: flex-start;
    margin-top: 5px;
    color: #071810;
}

nav {
    display: flex;
    align-items: center;
    gap: 25px;
    margin-left: auto;
    font-size: 13px;
    font-weight: 500;
}

nav a:hover,
.text-link:hover,
.contact-links a:hover {
    color: var(--green);
}

.nav-contact {
    border: 1px solid var(--line);
    padding: 9px 15px;
    border-radius: 100px;
}

.nav-contact span {
    margin-left: 14px;
}

/* Dark/light theme switch */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: 7px;
    min-height: 38px;
    padding: 8px 12px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 100px;
    color: var(--ink);
    font-size: 11px;
    flex-shrink: 0;
}

.theme-toggle svg {
    width: 16px;
    height: 16px;
}

.moon-icon {
    display: none;
}

[data-theme="light"] .sun-icon {
    display: none;
}

[data-theme="light"] .moon-icon {
    display: block;
}

/* Reading progress indicator below the navigation */
.reading-progress {
    height: 2px;
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    background: linear-gradient(90deg, var(--green), #428eff);
    transform: scaleX(var(--progress, 0));
    transform-origin: left;
}

/* =========================================================
   04. HERO SECTION
   Controls the introduction, headline, location and CTA buttons.
========================================================= */

.hero {
    display: grid;
    grid-template-columns: 1.12fr 1fr;
    gap: 54px;
    padding-top: 76px;
    padding-bottom: 70px;
    align-items: center;
    position: relative;
}

.hero:before {
    content: '';
    position: absolute;
    right: 0;
    top: 0;
    width: 60%;
    height: 90%;
    background: radial-gradient(ellipse at 75% 40%, #2879ee12, transparent 65%);
    pointer-events: none;
    z-index: -1;
}

.identity-label {
    font: 10px/1.5 monospace;
    letter-spacing: 2.4px;
    color: var(--muted);
    margin-bottom: 15px;
}

.eyebrow,
.mini-label {
    font-size: 10px;
    letter-spacing: 1.8px;
    font-weight: 650;
}

.eyebrow {
    display: flex;
    align-items: center;
    gap: 9px;
    color: var(--blue);
    margin-bottom: 24px;
}

.hero .eyebrow {
    color: var(--green);
    font-size: 9px;
    letter-spacing: 1.2px;
    margin-bottom: 25px;
}

.status-dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    flex-shrink: 0;
    background: var(--green);
    border-radius: 50%;
    box-shadow: 0 0 0 4px #25e88a12;
}

h1,
h2,
h3,
h4,
p {
    margin: 0;
}

h1,
h2,
h3,
h4 {
    font-family: var(--display);
}

h1 {
    font-size: clamp(41px, 4.7vw, 60px);
    font-weight: 800;
    letter-spacing: -3.1px;
    line-height: 1.13;
}

h1 em {
    font-style: normal;
    color: var(--green);
}

.hero .intro {
    font-size: 16px;
    margin-top: 25px;
    line-height: 1.85;
    max-width: 535px;
    color: var(--muted);
}

.hero-note {
    font: 12px/1.85 var(--sans);
    max-width: 490px;
    color: var(--muted);
    margin-top: 16px;
}

.actions {
    display: flex;
    gap: 25px;
    align-items: center;
    margin-top: 29px;
}

.hero .actions {
    margin-top: 27px;
}

.button {
    display: inline-flex;
    gap: 27px;
    align-items: center;
    font-size: 13px;
    font-weight: 500;
    border-radius: 6px;
    padding: 13px 19px;
}

.primary {
    background: var(--green);
    color: #061b12;
    border-radius: 100px;
    font-weight: 700;
    box-shadow: 0 6px 25px #25e88a13;
}

.primary:hover {
    background: #54f5a5;
    color: #061b12;
    box-shadow: 0 8px 28px #25e88a25;
}

.text-link {
    font-size: 13px;
}

.hero-location {
    display: flex;
    gap: 22px;
    font-size: 10px;
    color: var(--muted);
    margin-top: 30px;
}

.hero-location span+span {
    border-left: 1px solid var(--line);
    padding-left: 22px;
}

/* =========================================================
   05. PLATFORM MAP / ARCHITECTURE VISUAL
   Controls the decorative data-engineering architecture graphic.
========================================================= */

.platform-map {
    position: relative;
    border: 1px solid var(--line);
    border-radius: 17px;
    background: var(--panel);
    padding: 23px 20px 17px;
    box-shadow: 0 30px 80px #0002;
    overflow: hidden;
}

.platform-map:before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 50% 48%, #1ed76009, transparent 50%),
        radial-gradient(ellipse at 85% 85%, #438eff0b, transparent 60%);
    pointer-events: none;
}

.map-heading {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    align-items: center;
    position: relative;
}

.map-heading .mini-label {
    font-size: 8px;
    letter-spacing: 1.5px;
    color: var(--muted);
}

.map-coordinates {
    font: 7px monospace;
    color: var(--muted);
    opacity: .8;
}

.map-canvas {
    height: 470px;
    position: relative;
    margin: 10px 0 0;
    background-image: radial-gradient(var(--dot) .6px, transparent .6px);
    background-size: 17px 17px;
    color: var(--blue);
}

.map-wires {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.wire-base {
    stroke: var(--connector);
    stroke-width: 1;
}

.wire-signal {
    stroke: url(#wire);
    stroke-width: 1.8;
    stroke-dasharray: 12 250;
    stroke-linecap: round;
}

.map-node {
    position: absolute;
    width: 44%;
    padding: 14px 12px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 9px;
    box-shadow: 0 6px 18px #00000009;
    min-height: 117px;
    color: var(--ink);
}

.node-ai {
    left: 0;
    top: 16px;
}

.node-growth {
    right: 0;
    top: 16px;
}

.node-partners {
    left: 0;
    bottom: 16px;
}

.node-tools {
    right: 0;
    bottom: 16px;
}

.node-glyph {
    display: block;
    font: 20px/1 monospace;
    color: var(--green);
    margin-bottom: 11px;
}

.node-growth .node-glyph,
.node-tools .node-glyph {
    color: var(--blue);
}

.node-tag {
    display: block;
    font: 7px/1.5 monospace;
    letter-spacing: 1px;
    color: var(--muted);
}

.map-node h3 {
    font-size: 13px;
    font-weight: 650;
    letter-spacing: -.2px;
    margin: 5px 0;
}

.map-node p {
    font-size: 9px;
    line-height: 1.7;
    color: var(--muted);
}

.map-core {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 184px;
    min-height: 136px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    border: 1px solid #25e88a70;
    border-radius: 12px;
    background: linear-gradient(125deg, #12352e, #12243f);
    box-shadow: 0 0 35px #25e88a0c, 0 14px 30px #0003;
    color: #f1f7fc;
    padding: 13px;
}

.map-core .node-tag {
    font-size: 6px;
    letter-spacing: 1.2px;
    color: #8bbda8;
}

.map-core strong {
    font: 700 24px/1.15 var(--display);
    letter-spacing: -.8px;
    margin: 6px 0 9px;
}

.core-caption {
    font: 7px monospace;
    color: #a7c1cb;
}

.core-mark {
    display: flex;
    align-items: center;
    gap: 3px;
    height: 12px;
    margin-bottom: 5px;
}

.core-mark i {
    height: 8px;
    width: 3px;
    border-radius: 1px;
    background: #25e88a;
}

.core-mark i:nth-child(2) {
    height: 12px;
    background: #64daae;
}

.core-mark i:nth-child(3) {
    height: 6px;
    background: #6daaff;
}

.map-rail {
    display: flex;
    justify-content: space-around;
    gap: 8px;
    border-top: 1px solid var(--line);
    padding-top: 16px;
    font: 7px/1.5 monospace;
    letter-spacing: .7px;
    color: var(--muted);
}

.map-rail span:first-child {
    color: var(--green);
}

.map-rail i {
    display: inline-block;
    width: 4px;
    height: 4px;
    background: var(--green);
    border-radius: 50%;
    margin-right: 5px;
    vertical-align: middle;
}

.map-footnote {
    text-align: center;
    font-size: 7px;
    color: var(--muted);
    margin-top: 11px;
}

/* =========================================================
   06. CAREER STRIP
   The horizontal company-name strip below the hero section.
========================================================= */

.career-strip {
    border-block: 1px solid var(--line);
}

.career-inner {
    min-height: 98px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.career-inner .mini-label {
    font-size: 10px;
    color: var(--muted);
}

.career-inner>div {
    display: flex;
    gap: 42px;
    align-items: center;
}

.career-inner strong {
    font-family: var(--display);
    font-size: 21px;
    letter-spacing: -.8px;
    font-weight: 700;
}

.career-inner strong:first-child {
    color: var(--green);
}

.strip-note {
    font-size: 10px;
    color: var(--muted);
}

/* =========================================================
   07. GENERAL SECTION HEADINGS
   Shared spacing and heading styles used across page sections.
========================================================= */

.section {
    padding-block: 90px;
}

.section-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 50px;
    margin-bottom: 48px;
}

.section-heading .eyebrow {
    margin-bottom: 15px;
}

.section-heading h2 {
    font-size: 38px;
    font-weight: 700;
    letter-spacing: -1.8px;
    line-height: 1.25;
}

.section-heading>p {
    font-size: 13px;
    color: var(--muted);
    max-width: 300px;
    line-height: 1.8;
}

/* =========================================================
   08. EXPERIENCE SECTION
   Controls employment history, responsibilities and skill tags.
========================================================= */

.role {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 40px;
    padding: 38px 0;
    border-top: 1px solid var(--line);
}

.role:last-child {
    padding-bottom: 0;
}

.role-index {
    font: 10px monospace;
    color: var(--blue);
}

.role-meta {
    min-width: 0;
}

.role-meta h3 {
    font-size: 25px;
    letter-spacing: -.9px;
    margin: 7px 0 8px;
    font-weight: 800;
}

.role:first-child .role-meta h3 {
    color: var(--green);
}

.role-meta p {
    font-size: 12px;
}

.location {
    font-size: 11px;
    color: var(--muted);
}

.role-title {
    display: flex;
    align-items: center;
    gap: 14px;
}

.role-title h4 {
    font-size: 19px;
    letter-spacing: -.4px;
    font-weight: 650;
}

.current {
    font-size: 8px;
    letter-spacing: 1px;
    padding: 3px 9px;
    border-radius: 100px;
    background: #25e88a18;
    border: 1px solid #25e88a44;
    color: var(--green);
}

.role-summary {
    font-size: 14px;
    margin-top: 13px;
    color: var(--muted);
    line-height: 1.85;
}

.role-points {
    padding: 0;
    list-style: none;
    margin: 19px 0;
    display: grid;
    gap: 12px;
}

.role-points li {
    font-size: 12px;
    color: var(--muted);
    line-height: 1.85;
    position: relative;
    padding-left: 14px;
}

.role-points li:before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 4px;
    height: 4px;
    background: var(--blue);
    border-radius: 1px;
}

.role-points strong {
    font-weight: 600;
    color: var(--ink);
}

.tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.tags span {
    background: var(--soft);
    border: 1px solid var(--line);
    font-size: 9px;
    padding: 3px 8px;
    border-radius: 4px;
    color: var(--muted);
}

.promotion {
    display: flex;
    flex-direction: column;
    gap: 3px;
    margin-top: 13px;
    border-left: 2px solid var(--blue);
    padding-left: 12px;
    font-size: 11px;
    color: var(--muted);
}

.promotion small {
    font-size: 10px;
    color: var(--muted);
    margin-top: 3px;
}

/* =========================================================
   09. COMPANY LOGOS
   Desktop logo container: 112 × 52 px.
   object-fit keeps logos from becoming distorted.
   scale(1.3) enlarges the artwork inside the container.
   Mobile rules below resize the container, while the scale
   remains inherited unless explicitly overridden.
========================================================= */

.company-heading {
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    gap: 14px;
    width: 100%;
    min-width: 0;
    min-height: 60px;
    margin: 9px 0 14px;
    color: var(--ink);
    font-family: var(--display);
    font-size: 23px;
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -.6px;
}

/* White background keeps different logo styles consistent */
.company-wordmark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 112px;
    width: 112px;
    height: 52px;
    min-width: 112px;
    padding: 8px 12px;
    overflow: hidden;
    background: #fff;
    border: 1px solid #e2e7f0;
    border-radius: 10px;
}

/* Logo image sizing and visual zoom */
.company-wordmark img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transform: scale(1.3);
}

/* Company name takes the remaining available width */
.company-name {
    display: block;
    flex: 1 1 auto;
    min-width: 0;
    color: var(--ink);
    overflow-wrap: break-word;
}

/* Keep company names the same color, including the first role */
.role:first-child .company-heading,
.role:first-child .company-name {
    color: var(--ink);
}

/* =========================================================
   10. PROJECTS SECTION
   Controls project cards, category filters and technology tags.
========================================================= */

.projects-section {
    background: var(--panel);
    border-block: 1px solid var(--line);
}

.project-toolbar {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-bottom: 23px;
    border-bottom: 1px solid var(--line);
    padding-bottom: 20px;
}

.filter {
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 100px;
    padding: 8px 15px;
    color: var(--muted);
    font-size: 11px;
}

.filter.active {
    background: var(--green);
    color: #071d13;
    border-color: var(--green);
    font-weight: 650;
}

.filter:hover {
    border-color: var(--green);
}

#project-count {
    margin-left: auto;
    font-size: 10px;
    color: var(--muted);
}

.project-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.project {
    border: 1px solid var(--line);
    border-radius: 13px;
    background: var(--paper);
    padding: 27px;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.project[hidden] {
    display: none;
}

.project:before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    border-radius: inherit;
    background: linear-gradient(135deg, #3688ff0d, transparent 50%);
    opacity: 0;
    transition: opacity .3s;
}

.project:hover:before {
    opacity: 1;
}

.project:hover {
    border-color: var(--blue);
    box-shadow: 0 16px 32px #00000015;
}

.project-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 21px;
    color: var(--blue);
}

.project-top .mini-label {
    font-size: 8px;
    letter-spacing: 1.5px;
    color: var(--blue);
}

.project-index {
    font: 10px monospace;
    color: var(--muted);
}

.project h3 {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -.7px;
    line-height: 1.35;
}

.project-label {
    font-size: 9px;
    color: var(--muted);
    margin-top: 7px;
}

.project-desc {
    font-size: 12px;
    color: var(--muted);
    line-height: 1.9;
    margin-top: 17px;
}

.flow {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 7px;
    border-block: 1px solid var(--line);
    padding: 17px 0;
    margin: 23px 0;
    font: 9px/1.7 monospace;
    color: var(--muted);
}

.flow i {
    font-style: normal;
    color: var(--green);
}

.project-footer {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 15px;
    margin-top: auto;
}

.project-footer a {
    font-size: 10px;
    white-space: nowrap;
    padding-top: 3px;
    font-weight: 600;
}

.project-footer .tags span {
    font-size: 8px;
    padding: 2px 6px;
}

.project-footer a:hover,
.repo-link:hover {
    color: var(--green);
}

.project-footer a span {
    display: inline-block;
}

.repo-link {
    display: block;
    width: fit-content;
    margin: 29px auto 0;
    font-size: 12px;
    border-bottom: 1px solid var(--line);
    padding-bottom: 5px;
}

.repo-link span {
    margin-left: 22px;
}

/* =========================================================
   11. EXPERTISE AND SKILLS
   Three-column skills layout and education/certification details.
========================================================= */

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 35px;
}

.expertise-grid article {
    border-top: 2px solid var(--blue);
    padding-top: 18px;
}

.expertise-grid article:nth-child(2) {
    border-color: var(--green);
}

.expertise-grid article:nth-child(3) {
    border-color: #847dff;
}

.cap-number {
    font: 10px monospace;
    color: var(--blue);
}

.expertise-grid h3 {
    font-size: 18px;
    letter-spacing: -.5px;
    margin: 15px 0 12px;
}

.expertise-grid p {
    font-size: 12px;
    color: var(--muted);
    line-height: 1.9;
}

.skill-text {
    font-size: 11px;
    color: var(--blue);
    line-height: 2;
    margin-top: 22px;
}

/* Education and credentials */
.credentials {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    border-top: 1px solid var(--line);
    margin-top: 65px;
    padding-top: 38px;
}

.credentials .eyebrow {
    font-size: 9px;
    letter-spacing: 1.5px;
    margin-bottom: 14px;
}

.credentials h3 {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: -.3px;
}

.credentials p {
    font-size: 12px;
    color: var(--muted);
    margin-top: 10px;
    line-height: 1.9;
}

.credentials ul {
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 11px;
    color: var(--muted);
    line-height: 2.1;
}

/* =========================================================
   12. WORK CASES / PROJECT DETAIL
   Controls detailed project descriptions, expandable details,
   engineering principles and project architecture sections.
========================================================= */

.work-section-label {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
    margin-bottom: 22px;
}

.work-section-label h3 {
    font: 650 15px var(--display);
    letter-spacing: -.3px;
}

.work-section-label>span:last-child {
    margin-left: auto;
    font: 8px monospace;
    letter-spacing: 1px;
    color: var(--muted);
}

.internal-work {
    border-top: 1px solid var(--line);
}

.work-case {
    display: grid;
    grid-template-columns: 50px 1fr;
    gap: 20px;
    padding: 28px 0;
    border-bottom: 1px solid var(--line);
}

.work-case-index {
    font: 11px monospace;
    color: var(--blue);
    padding-top: 4px;
}

.work-case-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    margin-bottom: 10px;
}

.work-case-top .mini-label {
    color: var(--blue);
    font-size: 8px;
    letter-spacing: 1.5px;
}

.internal-badge {
    border: 1px solid var(--line);
    border-radius: 100px;
    padding: 3px 9px;
    font: 9px var(--sans);
    white-space: nowrap;
    color: var(--muted);
    background: var(--surface);
}

.work-case h3 {
    font-size: 24px;
    font-weight: 650;
    letter-spacing: -.7px;
    line-height: 1.4;
}

.work-desc {
    font-size: 13px;
    line-height: 1.85;
    color: var(--muted);
    max-width: 780px;
    margin-top: 10px;
}

.work-scope {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 11px;
    color: var(--ink);
    margin-top: 17px;
}

.work-scope>span:first-child {
    font: 7px monospace;
    letter-spacing: 1.2px;
    color: var(--green);
}

.work-status {
    margin-left: auto;
    font-size: 9px;
    color: var(--muted);
}

.case-details {
    margin-top: 18px;
}

.case-details summary {
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 16px;
    width: fit-content;
    font-size: 11px;
    color: var(--blue);
    padding: 4px 0;
}

.case-details summary::-webkit-details-marker {
    display: none;
}

.case-details summary>span {
    font: 18px/1 monospace;
    transition: transform .25s;
}

.case-details[open] summary>span {
    transform: rotate(45deg);
}

.case-details summary:hover {
    color: var(--green);
}

.case-details summary:focus-visible {
    outline: 2px solid var(--blue);
    outline-offset: 5px;
}

.case-expanded {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 36px;
    margin-top: 18px;
    padding: 22px 25px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--paper);
}

.case-expanded h4 {
    font-size: 11px;
    font-weight: 650;
    margin-bottom: 8px;
}

.case-expanded p {
    font-size: 12px;
    line-height: 1.9;
    color: var(--muted);
}

.work-boundary {
    font: 10px/1.8 var(--sans);
    color: var(--muted);
    margin-top: 18px;
}

/* Public/personal projects heading */
.public-project-heading {
    margin: 63px 0 27px;
    padding-top: 38px;
    border-top: 1px solid var(--line);
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 25px;
}

.public-project-heading .eyebrow {
    font-size: 8px;
    letter-spacing: 1.5px;
    margin-bottom: 13px;
}

.public-project-heading h3 {
    font-size: 27px;
    line-height: 1.3;
    letter-spacing: -.8px;
}

.public-project-heading>p {
    font-size: 11px;
    color: var(--muted);
    max-width: 220px;
}

/* Engineering pillar cards */
.pillar-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
}

.pillar {
    padding: 27px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    position: relative;
}

.pillar .cap-number {
    font-size: 10px;
}

.pillar h3 {
    font-size: 19px;
    line-height: 1.4;
    letter-spacing: -.6px;
    margin: 20px 0 14px;
}

.pillar p {
    font-size: 12px;
    line-height: 1.95;
    color: var(--muted);
}

.pillar-focus {
    font: 10px/1.8 monospace;
    color: var(--blue);
    margin-top: 24px;
}

.pillar-tools {
    font-size: 10px;
    line-height: 1.8;
    color: var(--muted);
    margin-top: 7px;
}

.pillar-statement {
    background: var(--panel);
}

.pillar-statement .mini-label {
    font: 8px monospace;
    letter-spacing: 1.6px;
    color: var(--green);
}

.pillar-statement h3 {
    font-size: 26px;
    letter-spacing: -.9px;
    margin-top: 22px;
}

.statement-end {
    display: block;
    font: 9px/1.8 monospace;
    color: var(--green);
    margin-top: 27px;
}

/* Engineering principles list */
.engineering-principles {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-top: 60px;
}

.principles-heading .eyebrow {
    font-size: 9px;
    margin-bottom: 13px;
}

.principles-heading h3 {
    font-size: 26px;
    letter-spacing: -.8px;
    line-height: 1.3;
}

.engineering-principles>div:last-child {
    display: grid;
    gap: 22px;
}

.engineering-principles article {
    position: relative;
    padding-left: 34px;
}

.engineering-principles article>span {
    position: absolute;
    left: 0;
    top: 3px;
    color: var(--blue);
    font: 10px monospace;
}

.engineering-principles h4 {
    font-size: 14px;
    letter-spacing: -.3px;
    font-weight: 650;
    margin-bottom: 6px;
}

.engineering-principles p {
    font-size: 12px;
    line-height: 1.85;
    color: var(--muted);
}

/* =========================================================
   13. CONTACT SECTION AND FOOTER
   Controls contact information, portrait and bottom footer.
========================================================= */

.contact-section {
    background: var(--panel);
    border-block: 1px solid var(--line);
    position: relative;
}

.contact-section:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--green), #3986ff, transparent);
}

.contact-inner {
    padding-block: 65px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}

.contact-inner .eyebrow {
    font-size: 9px;
    margin-bottom: 17px;
}

.contact-inner h2 {
    font-size: 40px;
    letter-spacing: -1.8px;
    line-height: 1.25;
    font-weight: 750;
}

.contact-inner>div>p {
    font-size: 12px;
    color: var(--muted);
    margin-top: 17px;
}

.contact-email {
    display: inline-block;
    font-size: 22px;
    letter-spacing: -.5px;
    margin-top: 20px;
    border-bottom: 1px solid var(--line);
    padding-bottom: 5px;
    color: var(--green);
}

.contact-email span {
    margin-left: 30px;
}

.contact-links {
    display: flex;
    gap: 22px;
    margin-top: 21px;
    align-items: center;
    font-size: 11px;
}

.contact-links button {
    background: none;
    border: 0;
    padding: 0;
    color: var(--ink);
    font-size: 11px;
}

.contact-links button:hover {
    text-decoration: underline;
}

#copy-status {
    font-size: 10px;
    color: var(--green);
}

.resume-link {
    font-size: 10px;
    display: block;
    margin-top: 24px;
    color: var(--muted);
}

.resume-link>span {
    margin-left: 10px;
    color: var(--muted);
    font-size: 9px;
}

/* Profile photograph */
.portrait {
    width: 210px;
    flex-shrink: 0;
}

.portrait img {
    display: block;
    width: 210px;
    height: auto;
    aspect-ratio: 1;
    object-fit: cover;
    object-position: center;
    filter: none;
    border: 1px solid var(--line);
    border-radius: 12px;
}

.portrait p {
    font-size: 12px !important;
    margin-top: 12px !important;
    font-weight: 600;
}

.portrait p span {
    display: block;
    font-size: 10px;
    font-weight: 400;
    margin-top: 3px;
}

footer {
    display: flex;
    gap: 20px;
    justify-content: space-between;
    padding-block: 25px;
    font-size: 9px;
    color: var(--muted);
}

footer a {
    color: var(--ink);
}

/* =========================================================
   14. ANIMATIONS AND INTERACTION EFFECTS
   Animations run only when the visitor has not requested
   reduced motion in their operating-system settings.
========================================================= */

@media(prefers-reduced-motion:no-preference) {
    body,
    header,
    .project,
    .theme-toggle,
    .tags span,
    .projects-section,
    .contact-section {
        transition: background-color .35s, color .35s, border-color .35s;
    }

    .button,
    .theme-toggle,
    .filter,
    .project,
    .nav-contact {
        transition:
            transform .22s cubic-bezier(.2, .8, .2, 1),
            background-color .25s,
            border-color .25s,
            box-shadow .25s;
    }

    .button:hover,
    .theme-toggle:hover {
        transform: translateY(-3px);
    }

    .button:active,
    .theme-toggle:active,
    .filter:active,
    .nav-contact:active {
        transform: scale(.95);
    }

    .project:hover {
        transform: translateY(-5px);
    }

    .button span,
    .project-footer a span,
    .text-link {
        transition: transform .25s;
    }

    .button:hover span,
    .project-footer a:hover span {
        transform: translate(2px, -2px);
    }

    /* Animated underline on navigation links */
    nav a {
        position: relative;
    }

    nav a:not(.nav-contact):after {
        content: '';
        position: absolute;
        bottom: -9px;
        left: 0;
        width: 100%;
        height: 2px;
        background: var(--green);
        transform: scaleX(0);
        transform-origin: left;
        transition: transform .25s;
    }

    nav a:hover:after,
    nav a[aria-current="location"]:after {
        transform: scaleX(1);
    }

    /* Scroll reveal animation */
    .motion-ready .reveal {
        opacity: 0;
        transform: translateY(22px);
        transition: opacity .65s, transform .65s cubic-bezier(.2, .7, .2, 1);
    }

    .motion-ready .reveal.in-view {
        opacity: 1;
        transform: none;
    }

    .hero-copy {
        animation: hero-enter .8s both;
    }

    .platform-map {
        animation: hero-enter .9s .12s both;
    }

    .source-row span:nth-child(2) {
        animation: signal 5s 1s infinite;
    }

    .system-bottom .status-dot {
        animation: signal-dot 3s infinite;
    }

    .filter-enter {
        animation: filter-enter .4s cubic-bezier(.2, .8, .2, 1) both;
        animation-delay: var(--card-delay, 0ms);
    }

    .click-ring {
        position: fixed;
        pointer-events: none;
        z-index: 50;
        width: 12px;
        height: 12px;
        border: 1px solid var(--green);
        border-radius: 50%;
        animation: click-ring .45s ease-out forwards;
    }

    .wire-signal {
        animation: flow-through 9s linear infinite;
    }

    .core-mark i {
        animation: core-signal 3s ease-in-out infinite;
    }

    .core-mark i:nth-child(2) {
        animation-delay: .35s;
    }

    .core-mark i:nth-child(3) {
        animation-delay: .7s;
    }

    .case-details[open] .case-expanded {
        animation: case-open .3s ease both;
    }

    /* Animation definitions */
    @keyframes hero-enter {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: none;
        }
    }

    @keyframes filter-enter {
        from {
            opacity: 0;
            transform: translateY(12px) scale(.98);
        }
        to {
            opacity: 1;
            transform: none;
        }
    }

    @keyframes signal {
        0%, 65%, 100% {
            border-color: var(--line);
        }
        80% {
            border-color: var(--blue);
            box-shadow: 0 0 15px #4a96ff18;
        }
    }

    @keyframes signal-dot {
        50% {
            box-shadow: 0 0 0 5px #25e88a15;
        }
    }

    @keyframes click-ring {
        to {
            transform: scale(4);
            opacity: 0;
        }
    }

    @keyframes flow-through {
        to {
            stroke-dashoffset: -524;
        }
    }

    @keyframes core-signal {
        50% {
            opacity: .45;
            transform: scaleY(.6);
        }
    }

    @keyframes case-open {
        from {
            opacity: 0;
            transform: translateY(-7px);
        }
        to {
            opacity: 1;
            transform: none;
        }
    }
}

/* =========================================================
   15. TABLET RESPONSIVENESS
   Adjusts layout for screens up to 1050px wide.
========================================================= */

@media(max-width:1050px) {
    .container,
    .nav-wrap {
        width: calc(100% - 64px);
    }

    .nav-wrap {
        gap: 15px;
    }

    nav {
        gap: 17px;
    }

    .hero {
        gap: 30px;
    }

    .hero h1 {
        font-size: 48px;
        letter-spacing: -2.5px;
    }

    .map-heading {
        flex-wrap: wrap;
        gap: 4px;
    }

    .platform-map {
        padding-inline: 15px;
    }

    .map-node {
        padding: 12px 10px;
    }

    .map-core {
        width: 160px;
    }

    .map-node h3 {
        font-size: 11px;
    }

    .map-node p {
        font-size: 8px;
    }

    .map-core strong {
        font-size: 22px;
    }

    .map-rail {
        font-size: 6px;
    }

    .career-inner {
        justify-content: start;
        gap: 40px;
    }

    .career-inner>div {
        flex: 1;
        justify-content: space-between;
        gap: 20px;
    }

    .strip-note {
        display: none;
    }

    .role {
        grid-template-columns: 210px minmax(0, 1fr);
        gap: 25px;
    }

    .project-footer {
        flex-direction: column;
        gap: 14px;
    }

    .section-heading h2 {
        font-size: 34px;
    }

    .pillar {
        padding: 22px;
    }

    .pillar h3 {
        font-size: 17px;
    }

    .engineering-principles {
        gap: 35px;
    }
}

/* =========================================================
   16. MOBILE RESPONSIVENESS
   Adjusts the main layout for phones and narrow screens.
========================================================= */

@media(max-width:740px) {
    .container,
    .nav-wrap {
        width: calc(100% - 40px);
    }

    /* Compact navigation */
    .nav-wrap {
        height: 72px;
        gap: 10px;
    }

    .brand {
        font-size: 10px;
        gap: 8px;
    }

    .brand-icon {
        width: 30px;
        height: 32px;
        font-size: 19px;
    }

    nav {
        gap: 12px;
        font-size: 10px;
    }

    nav a[href="#expertise"],
    nav .nav-contact {
        display: none;
    }

    .theme-toggle {
        padding: 8px;
        min-width: 34px;
        justify-content: center;
    }

    .theme-toggle span {
        display: none;
    }

    /* Hero becomes a single-column layout */
    .hero {
        grid-template-columns: 1fr;
        gap: 36px;
        padding-top: 46px;
        padding-bottom: 45px;
    }

    .hero h1 {
        font-size: clamp(40px, 8.5vw, 60px);
        letter-spacing: -2.3px;
    }

    .hero .intro {
        font-size: 15px;
    }

    .hero .eyebrow {
        font-size: 8px;
        letter-spacing: 1px;
        margin-bottom: 21px;
    }

    .identity-label {
        font-size: 9px;
        letter-spacing: 2px;
        margin-bottom: 14px;
    }

    .hero-note {
        font-size: 11px;
    }

    .hero-location {
        font-size: 9px;
        gap: 14px;
    }

    .hero-location span+span {
        padding-left: 14px;
    }

    /* Scale down the architecture illustration */
    .platform-map {
        width: 100%;
        max-width: 480px;
        margin: auto;
        padding: 20px 15px 15px;
    }

    .map-heading {
        flex-wrap: nowrap;
    }

    .map-heading .mini-label {
        font-size: 7px;
    }

    .map-coordinates {
        font-size: 6px;
    }

    .map-canvas {
        height: 450px;
    }

    .map-node {
        min-height: 123px;
        padding: 12px 10px;
    }

    .map-node h3 {
        font-size: 12px;
    }

    .map-node p {
        font-size: 9px;
    }

    .map-core {
        width: 162px;
        min-height: 128px;
    }

    .map-core strong {
        font-size: 22px;
    }

    .node-tag {
        font-size: 6px;
        letter-spacing: .6px;
    }

    .node-glyph {
        font-size: 18px;
        margin-bottom: 9px;
    }

    .map-rail {
        font-size: 6px;
        gap: 6px;
    }

    .map-footnote {
        font-size: 6px;
    }

    /* Career strip becomes vertically stacked */
    .career-inner {
        padding-block: 22px;
        display: block;
        min-height: 0;
    }

    .career-inner .mini-label {
        display: block;
        margin-bottom: 13px;
        font-size: 8px;
    }

    .career-inner>div {
        display: flex;
        gap: 15px;
        justify-content: space-between;
    }

    .career-inner strong {
        font-size: 20px;
    }

    /* Reduce general section spacing */
    .section {
        padding-block: 55px;
    }

    .section-heading {
        display: block;
        margin-bottom: 32px;
    }

    .section-heading h2 {
        font-size: 31px;
        letter-spacing: -1.2px;
    }

    .section-heading>p {
        margin-top: 18px;
        max-width: 430px;
        font-size: 12px;
    }

    /* Experience entries become a single column */
    .role {
        grid-template-columns: 1fr;
        gap: 18px;
        padding-block: 28px;
    }

    .role-meta {
        display: block;
        min-width: 0;
    }

    .role-index {
        display: none;
    }

    /* Company heading and logo dimensions on mobile */
    .role-meta .company-heading {
        margin: 0 0 10px;
        min-height: 48px;
        font-size: 19px;
        gap: 11px;
    }

    .company-wordmark {
        flex-basis: 96px;
        width: 96px;
        min-width: 96px;
        height: 44px;
        padding: 6px 10px;
    }

    /*
       The desktop transform: scale(1.3) is inherited here.
       Increase max dimensions only if the actual mobile preview
       shows the artwork is still too small.
    */
    .company-wordmark img {
        max-width: 76px;
        max-height: 29px;
    }

    .company-name {
        overflow-wrap: anywhere;
    }

    .role-meta p {
        font-size: 10px;
    }

    .role-meta .location {
        font-size: 10px;
    }

    .role-title h4 {
        font-size: 17px;
    }

    .role-summary {
        font-size: 13px;
    }

    .role-points li {
        font-size: 12px;
    }

    /* Project cards stack vertically */
    .project-grid {
        grid-template-columns: 1fr;
    }

    .project-toolbar {
        flex-wrap: wrap;
        gap: 3px;
    }

    .filter {
        font-size: 10px;
        padding: 7px 10px;
    }

    #project-count {
        width: 100%;
        margin-top: 10px;
        font-size: 9px;
    }

    .project {
        padding: 23px;
    }

    .project h3 {
        font-size: 21px;
    }

    .project-footer {
        flex-direction: row;
        align-items: center;
    }

    .project-footer .tags {
        max-width: 65%;
    }

    /* Skills and credentials become single-column layouts */
    .expertise-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .expertise-grid h3 {
        margin: 8px 0;
    }

    .skill-text {
        margin-top: 13px;
    }

    .credentials {
        grid-template-columns: 1fr;
        gap: 30px;
        margin-top: 36px;
        padding-top: 28px;
    }

    /* Work case layout */
    .work-section-label {
        flex-wrap: wrap;
        gap: 8px;
    }

    .work-section-label>span:last-child {
        font-size: 7px;
        letter-spacing: .5px;
    }

    .work-case {
        grid-template-columns: 1fr;
        gap: 9px;
        padding-block: 24px;
    }

    .work-case-index {
        font-size: 9px;
        padding: 0;
    }

    .work-case-top {
        gap: 10px;
        align-items: start;
    }

    .work-case-top .mini-label {
        font-size: 7px;
        letter-spacing: 1px;
        max-width: 55%;
    }

    .internal-badge {
        font-size: 8px;
        padding: 3px 7px;
    }

    .work-case h3 {
        font-size: 21px;
        letter-spacing: -.6px;
    }

    .work-desc {
        font-size: 12px;
    }

    .work-scope {
        font-size: 10px;
        gap: 8px;
    }

    .work-status {
        margin-left: 0;
        width: 100%;
        padding-top: 2px;
        font-size: 9px;
    }

    .case-expanded {
        grid-template-columns: 1fr;
        gap: 18px;
        padding: 18px;
    }

    .case-expanded p {
        font-size: 11px;
    }

    .work-boundary {
        font-size: 9px;
    }

    /* Personal/public project section */
    .public-project-heading {
        display: block;
        margin-top: 40px;
        padding-top: 28px;
    }

    .public-project-heading h3 {
        font-size: 24px;
    }

    .public-project-heading>p {
        max-width: 100%;
        margin-top: 13px;
    }

    .pillar-grid {
        grid-template-columns: 1fr 1fr;
    }

    .pillar {
        padding: 20px;
    }

    .pillar h3 {
        font-size: 16px;
        margin-top: 15px;
    }

    .pillar p {
        font-size: 11px;
        line-height: 1.85;
    }

    .pillar-focus,
    .pillar-tools {
        font-size: 9px;
    }

    .pillar-statement h3 {
        font-size: 23px;
    }

    .statement-end {
        font-size: 8px;
    }

    /* Engineering principles stack vertically */
    .engineering-principles {
        grid-template-columns: 1fr;
        gap: 25px;
        margin-top: 40px;
    }

    .principles-heading h3 {
        font-size: 24px;
    }

    .engineering-principles p {
        font-size: 11px;
    }

    /* Contact information and profile photo */
    .contact-inner {
        padding-block: 45px;
        gap: 30px;
        align-items: start;
    }

    .contact-inner h2 {
        font-size: 30px;
        letter-spacing: -1px;
    }

    .contact-inner>div>p {
        font-size: 11px;
    }

    .contact-email {
        font-size: 18px;
    }

    .contact-email span {
        margin-left: 8px;
    }

    .portrait {
        width: 100px;
    }

    .portrait img {
        width: 100px;
    }

    .portrait p {
        font-size: 10px !important;
    }

    .contact-links {
        gap: 16px;
        font-size: 10px;
        flex-wrap: wrap;
    }

    .contact-links button {
        font-size: 10px;
    }

    .resume-link>span {
        display: block;
        margin: 3px 0 0;
    }

    footer {
        font-size: 8px;
        gap: 14px;
        flex-wrap: wrap;
    }

    footer>span:nth-child(2) {
        display: none;
    }
}

/* =========================================================
   17. SMALL SCREEN ADJUSTMENTS
   Further adjustments for phones 430px wide and below.
========================================================= */

@media(max-width:430px) {
    .pillar-grid {
        grid-template-columns: 1fr;
    }

    .pillar {
        padding: 25px;
    }

    .pillar h3 {
        font-size: 19px;
    }

    .pillar p {
        font-size: 12px;
    }

    .pillar-focus,
    .pillar-tools {
        font-size: 10px;
    }

    .map-canvas {
        height: 410px;
    }

    .map-node h3 {
        font-size: 11px;
    }

    .map-node p {
        font-size: 8px;
    }

    .map-core {
        width: 150px;
    }

    .map-core strong {
        font-size: 21px;
    }

    .map-heading .mini-label {
        font-size: 6px;
        letter-spacing: 1px;
    }

    .map-coordinates {
        font-size: 5px;
    }

    .map-rail {
        font-size: 5px;
    }

    .work-section-label>span:last-child {
        width: 100%;
        margin-left: 15px;
    }

    /* Contact layout stacks photo below contact details */
    .contact-inner {
        display: block;
    }

    .portrait {
        margin-top: 30px;
        display: flex;
        gap: 14px;
        align-items: center;
        width: auto;
    }

    .portrait img {
        width: 90px;
    }

    .contact-email {
        font-size: 18px;
    }
}

/* Additional adjustments for phones 400px wide and below */
@media(max-width:400px) {
    .project-footer {
        flex-direction: column;
        align-items: start;
    }

    .project-footer .tags {
        max-width: 100%;
    }

    .hero-location {
        font-size: 8px;
    }
}

/* =========================================================
   18. EXTRA-SMALL PHONE ADJUSTMENTS
   Targets devices 360px wide and below.
========================================================= */

@media(max-width:360px) {
    .brand>span:last-child {
        max-width: 95px;
        line-height: 1.3;
    }

    .nav-wrap {
        gap: 7px;
    }

    nav {
        gap: 9px;
        font-size: 9px;
    }

    .hero .eyebrow {
        font-size: 7px;
        letter-spacing: 1px;
    }

    .hero h1 {
        font-size: 36px;
        letter-spacing: -1.9px;
    }

    .map-core {
        width: 136px;
    }

    .map-node {
        padding: 10px 8px;
    }

    .map-node h3 {
        font-size: 10px;
    }

    .node-tag {
        font-size: 5px;
    }

    .map-node p {
        font-size: 7px;
    }

    /* Smaller company logo container on narrow phones */
    .company-heading {
        gap: 8px;
        font-size: 17px;
    }

    .company-wordmark {
        flex-basis: 84px;
        width: 84px;
        min-width: 84px;
        height: 40px;
        padding: 5px 8px;
    }

    /* Inherits the desktop scale(1.3) rule */
    .company-wordmark img {
        max-width: 68px;
        max-height: 27px;
    }

    .map-canvas {
        height: 410px;
    }
}

/* =========================================================
   19. THEME-SPECIFIC OVERRIDES
   Small color corrections for buttons in light mode.
========================================================= */

html[data-theme="light"] .primary,
html[data-theme="light"] .filter.active {
    color: #fff;
}

html[data-theme="light"] .primary:hover {
    background: #006b46;
    color: #fff;
}

/* =========================================================
   20. REDUCED MOTION ACCESSIBILITY
   Respects visitors who disable animations on their devices.
========================================================= */

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