/*
 * Mahdi Mohseni — portfolio
 * A dependency-free design system for GitHub Pages.
 */

:root {
    --ink: #07110f;
    --ink-soft: #0b1714;
    --surface: #101e1a;
    --surface-raised: #152722;
    --surface-soft: #1b302a;
    --text: #f1f4eb;
    --text-soft: #b6c3b9;
    --text-muted: #809087;
    --line: rgba(223, 236, 226, 0.13);
    --line-strong: rgba(223, 236, 226, 0.25);
    --turquoise: #57d6c8;
    --turquoise-deep: #28a99c;
    --turquoise-soft: rgba(87, 214, 200, 0.12);
    --warm: #e3b96c;
    --danger: #ff9589;
    --success: #79dec0;
    --shadow: 0 30px 80px rgba(0, 0, 0, 0.3);
    --header-bg: rgba(7, 17, 15, 0.82);
    --display: "Helvetica Neue", "Avenir Next", Avenir, Helvetica, Arial, sans-serif;
    --serif: Iowan Old Style, Baskerville, "Times New Roman", serif;
    --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    --section-space: clamp(5.5rem, 10vw, 9rem);
    --shell: 1180px;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
    --radius-sm: 0.75rem;
    --radius-md: 1.25rem;
    --radius-lg: 2rem;
}

html[data-theme="light"] {
    --ink: #f3f1e9;
    --ink-soft: #ebe9df;
    --surface: #ffffff;
    --surface-raised: #f8f7f0;
    --surface-soft: #e7ebe4;
    --text: #10221d;
    --text-soft: #445950;
    --text-muted: #596b63;
    --line: rgba(15, 42, 34, 0.13);
    --line-strong: rgba(15, 42, 34, 0.25);
    --turquoise: #066e65;
    --turquoise-deep: #055b55;
    --turquoise-soft: rgba(8, 125, 115, 0.09);
    --warm: #9b6815;
    --danger: #b4362c;
    --success: #13745d;
    --shadow: 0 28px 70px rgba(26, 46, 39, 0.12);
    --header-bg: rgba(243, 241, 233, 0.86);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 5.5rem;
    background: var(--ink);
}

body {
    min-width: 320px;
    margin: 0;
    overflow-x: hidden;
    background:
        radial-gradient(circle at 12% 8%, rgba(57, 190, 175, 0.06), transparent 27rem),
        var(--ink);
    color: var(--text);
    font-family: var(--display);
    font-size: 1rem;
    line-height: 1.65;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

body.menu-open {
    overflow: hidden;
}

::selection {
    background: var(--turquoise);
    color: #07110f;
}

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

button,
input,
textarea {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

a {
    color: inherit;
}

:focus-visible {
    outline: 3px solid var(--turquoise);
    outline-offset: 4px;
}

.skip-link {
    position: fixed;
    top: 0.75rem;
    left: 0.75rem;
    z-index: 2000;
    padding: 0.7rem 1rem;
    transform: translateY(-160%);
    border-radius: 0.4rem;
    background: var(--text);
    color: var(--ink);
    font-weight: 700;
    text-decoration: none;
    transition: transform 180ms ease;
}

.skip-link:focus {
    transform: translateY(0);
}

.section-shell {
    width: min(calc(100% - 3rem), var(--shell));
    margin-inline: auto;
}

.section {
    position: relative;
    padding-block: var(--section-space);
    scroll-margin-top: 4.5rem;
}

.eyebrow {
    margin: 0 0 1.35rem;
    color: var(--turquoise);
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    line-height: 1.4;
    text-transform: uppercase;
}

.hero .eyebrow {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.hero .eyebrow > span {
    width: 1.7rem;
    height: 1px;
    background: currentColor;
}

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

h1,
h2,
h3,
h4 {
    line-height: 1.08;
}

h1,
h2 {
    margin-bottom: 0;
    font-weight: 580;
    letter-spacing: -0.055em;
}

h1 em,
h2 em {
    color: var(--turquoise);
    font-family: var(--serif);
    font-weight: 400;
    letter-spacing: -0.035em;
}

h2 {
    font-size: clamp(2.65rem, 5vw, 5rem);
}

.button {
    min-height: 3.4rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.9rem;
    padding: 0.85rem 1.35rem;
    border: 1px solid transparent;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 750;
    letter-spacing: 0.005em;
    line-height: 1;
    text-decoration: none;
    cursor: pointer;
    transition: transform 250ms var(--ease), background 250ms ease, border-color 250ms ease, color 250ms ease, box-shadow 250ms ease;
}

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

.button-primary {
    background: var(--turquoise);
    color: #061310;
    box-shadow: 0 12px 35px rgba(47, 187, 171, 0.18);
}

.button-primary:hover {
    background: #78e3d8;
    box-shadow: 0 16px 45px rgba(47, 187, 171, 0.26);
}

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

html[data-theme="light"] .button-primary:hover {
    background: #055b55;
    color: #fff;
}

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

.button-secondary:hover {
    border-color: var(--turquoise);
    background: var(--turquoise-soft);
}

.button-light {
    background: #f0f8f3;
    color: #0b2822;
}

.button-light:hover {
    background: #fff;
    box-shadow: 0 15px 35px rgba(1, 23, 19, 0.16);
}

/* Header and navigation */
.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    border-bottom: 1px solid transparent;
    transition: background 250ms ease, border-color 250ms ease, backdrop-filter 250ms ease;
}

.site-header.is-scrolled,
body.menu-open .site-header {
    border-color: var(--line);
    background: var(--header-bg);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
}

.nav-shell {
    width: min(calc(100% - 3rem), 1280px);
    min-height: 5.25rem;
    margin-inline: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 750;
    letter-spacing: -0.015em;
    text-decoration: none;
}

.brand-mark {
    width: 2.25rem;
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    border: 1px solid var(--line-strong);
    border-radius: 50%;
    color: var(--turquoise);
    font-family: var(--serif);
    font-size: 1.15rem;
    font-style: italic;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 2.1rem;
}

.site-nav a {
    position: relative;
    padding-block: 0.8rem;
    color: var(--text-soft);
    font-size: 0.82rem;
    font-weight: 650;
    text-decoration: none;
    transition: color 180ms ease;
}

.site-nav a::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 0.55rem;
    left: 0;
    height: 1px;
    transform: scaleX(0);
    transform-origin: right;
    background: var(--turquoise);
    transition: transform 250ms var(--ease);
}

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

.site-nav a:hover::after,
.site-nav a.is-active::after {
    transform: scaleX(1);
    transform-origin: left;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.nav-cv-link {
    min-height: 2.75rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    padding: 0.65rem 1rem;
    border-radius: 999px;
    background: var(--turquoise);
    color: #061310;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.03em;
    text-decoration: none;
    transition: transform 220ms var(--ease), background 180ms ease, box-shadow 180ms ease;
}

.nav-cv-link:hover {
    transform: translateY(-2px);
    background: #78e3d8;
    box-shadow: 0 10px 28px rgba(47, 187, 171, 0.2);
}

html[data-theme="light"] .nav-cv-link {
    background: var(--turquoise);
    color: #fff;
}

html[data-theme="light"] .nav-cv-link:hover {
    background: var(--turquoise-deep);
}

.icon-button,
.menu-toggle {
    width: 2.75rem;
    height: 2.75rem;
    display: grid;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: transparent;
    color: var(--text);
    cursor: pointer;
    transition: background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.icon-button:hover,
.menu-toggle:hover {
    border-color: var(--line-strong);
    background: var(--turquoise-soft);
    transform: rotate(-5deg);
}

.icon-button svg {
    width: 1.05rem;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.8;
}

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

html[data-theme="light"] .theme-sun {
    display: block;
}

.menu-toggle {
    display: none;
    align-content: center;
    gap: 0.35rem;
}

.menu-toggle span {
    width: 1.1rem;
    height: 1px;
    display: block;
    background: currentColor;
    transition: transform 220ms ease;
}

.menu-toggle[aria-expanded="true"] span:first-child {
    transform: translateY(3px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:last-child {
    transform: translateY(-3px) rotate(-45deg);
}

/* Hero */
.hero {
    min-height: 100svh;
    position: relative;
    display: flex;
    align-items: center;
    padding: 8.5rem 0 6.5rem;
    overflow: hidden;
    border-bottom: 1px solid var(--line);
}

.hero::before {
    content: "";
    position: absolute;
    top: 10%;
    right: -12rem;
    width: 38rem;
    height: 38rem;
    border: 1px solid var(--line);
    border-radius: 50%;
    box-shadow: 0 0 0 7rem rgba(87, 214, 200, 0.015), 0 0 0 14rem rgba(87, 214, 200, 0.01);
}

.hero-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(22rem, 0.72fr);
    align-items: center;
    gap: clamp(3rem, 8vw, 7rem);
}

.hero-copy {
    max-width: 730px;
}

.hero h1 {
    max-width: 820px;
    font-size: clamp(3.6rem, 7.15vw, 7.1rem);
    line-height: 0.94;
}

.hero h1 em {
    font-size: 0.58em;
    white-space: nowrap;
}

.hero-intro {
    max-width: 650px;
    margin: 2rem 0 2.1rem;
    color: var(--text-soft);
    font-size: clamp(1.06rem, 1.55vw, 1.25rem);
    line-height: 1.65;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.hero-facts {
    max-width: 660px;
    margin: 3rem 0 0;
    padding: 1.35rem 0 0;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
    border-top: 1px solid var(--line);
    list-style: none;
}

.hero-facts li {
    display: grid;
    gap: 0.15rem;
}

.hero-facts strong {
    color: var(--text);
    font-size: 0.9rem;
}

.hero-facts span {
    color: var(--text-muted);
    font-size: 0.76rem;
}

.hero-network {
    position: absolute;
    top: 48%;
    left: 43%;
    width: min(64rem, 69vw);
    transform: translateY(-50%);
    opacity: 0.32;
}

.network-lines path {
    fill: none;
    stroke: var(--turquoise);
    stroke-dasharray: 4 10;
    stroke-width: 0.8;
}

.network-nodes circle {
    fill: var(--ink);
    stroke: var(--turquoise);
    stroke-width: 1.4;
}

.network-nodes circle:nth-child(5) {
    fill: var(--turquoise);
    filter: drop-shadow(0 0 12px var(--turquoise));
}

.portrait-stage {
    width: min(100%, 465px);
    position: relative;
    justify-self: end;
    padding: 1.25rem 1rem 3rem;
}

.portrait-frame {
    position: relative;
    aspect-ratio: 0.86;
    overflow: hidden;
    border: 1px solid var(--line-strong);
    border-radius: 15rem 15rem 1.3rem 1.3rem;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.portrait-frame::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 52%, rgba(2, 18, 14, 0.25));
    pointer-events: none;
}

.portrait-frame picture,
.portrait-frame img {
    width: 100%;
    height: 100%;
}

.portrait-frame img {
    object-fit: cover;
    object-position: 50% 52%;
    filter: saturate(0.76) contrast(1.04);
}

.portrait-orbit {
    position: absolute;
    inset: 0 -1.2rem 1.4rem 1.5rem;
    border: 1px solid var(--turquoise);
    border-radius: 50% 50% 1.6rem 1.6rem;
    opacity: 0.4;
}

.portrait-orbit::after {
    content: "";
    position: absolute;
    top: 15%;
    right: -0.28rem;
    width: 0.55rem;
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--turquoise);
    box-shadow: 0 0 20px var(--turquoise);
}

.portrait-note {
    position: absolute;
    right: -1.4rem;
    bottom: 1.25rem;
    width: min(18rem, 75%);
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    padding: 1rem 1.1rem;
    border: 1px solid var(--line-strong);
    border-radius: 0.85rem;
    background: var(--header-bg);
    box-shadow: 0 16px 50px rgba(0, 0, 0, 0.25);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
}

.portrait-note p {
    margin: 0;
    color: var(--text);
    font-size: 0.76rem;
    line-height: 1.45;
}

.portrait-note small {
    display: block;
    margin-bottom: 0.2rem;
    color: var(--text-muted);
    font-family: var(--mono);
    font-size: 0.62rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.signal-dot {
    width: 0.48rem;
    min-width: 0.48rem;
    aspect-ratio: 1;
    display: inline-block;
    margin-top: 0.28rem;
    border-radius: 50%;
    background: var(--turquoise);
    box-shadow: 0 0 0 5px var(--turquoise-soft);
}

.portrait-index {
    position: absolute;
    bottom: 0.1rem;
    left: 1.5rem;
    color: var(--text-muted);
    font-family: var(--mono);
    font-size: 0.65rem;
    letter-spacing: 0.15em;
}

.scroll-cue {
    position: absolute;
    bottom: 1.75rem;
    left: 2.5rem;
    z-index: 3;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-muted);
    font-family: var(--mono);
    font-size: 0.63rem;
    letter-spacing: 0.1em;
    text-decoration: none;
    text-transform: uppercase;
}

.scroll-cue i {
    width: 3rem;
    height: 1px;
    position: relative;
    overflow: hidden;
    background: var(--line-strong);
}

.scroll-cue i::after {
    content: "";
    position: absolute;
    inset: 0;
    transform: translateX(-100%);
    background: var(--turquoise);
    animation: scroll-line 2.2s ease-in-out infinite;
}

@keyframes scroll-line {
    50%, 100% { transform: translateX(100%); }
}

/* Profile */
.profile-section {
    background: var(--ink-soft);
}

.profile-grid {
    display: grid;
    grid-template-columns: minmax(17rem, 0.78fr) minmax(0, 1.22fr);
    gap: clamp(3rem, 9vw, 8rem);
    align-items: start;
}

.profile-copy {
    max-width: 650px;
    padding-top: 2.5rem;
}

.profile-copy .lead {
    margin-bottom: 1.5rem;
    color: var(--text);
    font-size: clamp(1.45rem, 2.5vw, 2.15rem);
    letter-spacing: -0.035em;
    line-height: 1.25;
}

.profile-copy > p:not(.lead) {
    color: var(--text-soft);
}

.profile-links {
    margin-top: 2.25rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1.7rem;
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    border-bottom: 1px solid var(--line-strong);
    color: var(--text);
    font-size: 0.87rem;
    font-weight: 700;
    text-decoration: none;
    transition: border-color 180ms ease, color 180ms ease;
}

.text-link:hover {
    border-color: var(--turquoise);
    color: var(--turquoise);
}

/* Shared section heading */
.split-heading {
    margin-bottom: clamp(3rem, 6vw, 5rem);
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(17rem, 0.42fr);
    align-items: end;
    gap: 3rem;
}

.split-heading > p {
    margin-bottom: 0.55rem;
    padding-left: 1.4rem;
    border-left: 1px solid var(--turquoise);
    color: var(--text-soft);
    font-size: 0.95rem;
}

/* Expertise */
.expertise-section {
    overflow: hidden;
}

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

.expertise-card {
    min-height: 31rem;
    position: relative;
    display: flex;
    flex-direction: column;
    padding: clamp(1.5rem, 3vw, 2.25rem);
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--surface);
    transition: transform 350ms var(--ease), border-color 250ms ease, background 250ms ease;
}

.expertise-card::after {
    content: "";
    position: absolute;
    right: -6rem;
    bottom: -7rem;
    width: 15rem;
    aspect-ratio: 1;
    border: 1px solid var(--line);
    border-radius: 50%;
    box-shadow: 0 0 0 2.5rem rgba(87, 214, 200, 0.015), 0 0 0 5rem rgba(87, 214, 200, 0.01);
}

.expertise-card:hover {
    z-index: 2;
    transform: translateY(-0.5rem);
    border-color: var(--line-strong);
    background: var(--surface-raised);
}

.featured-expertise {
    background: linear-gradient(150deg, var(--surface-raised), var(--surface));
}

.card-index {
    align-self: flex-end;
    color: var(--text-muted);
    font-family: var(--mono);
    font-size: 0.64rem;
    letter-spacing: 0.12em;
}

.expertise-icon {
    width: 5rem;
    margin: 3.6rem 0 3rem;
    color: var(--turquoise);
}

.expertise-icon svg {
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.25;
}

.expertise-card h3 {
    max-width: 17rem;
    margin-bottom: 1rem;
    font-size: clamp(1.35rem, 2.1vw, 1.8rem);
    font-weight: 650;
    letter-spacing: -0.035em;
}

.expertise-card > p {
    margin-bottom: 2rem;
    color: var(--text-soft);
    font-size: 0.92rem;
}

.tag-list {
    position: relative;
    z-index: 2;
    margin: auto 0 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    list-style: none;
}

.tag-list li {
    padding: 0.35rem 0.7rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--text-soft);
    font-size: 0.68rem;
    font-weight: 650;
}

/* Featured work */
.work-section {
    background: var(--ink-soft);
}

.flagship-project {
    display: grid;
    grid-template-columns: minmax(22rem, 0.78fr) minmax(0, 1.22fr);
    min-height: 48rem;
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: #087e74;
    color: #effaf4;
    box-shadow: var(--shadow);
}

.project-copy {
    position: relative;
    z-index: 2;
    padding: clamp(2rem, 5vw, 4.5rem);
    background:
        linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px);
    background-size: 2.5rem 2.5rem;
}

.project-status {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    margin-bottom: 2rem;
    font-family: var(--mono);
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.project-status span {
    width: 0.42rem;
    aspect-ratio: 1;
    border-radius: 50%;
    background: #c5ffcf;
    box-shadow: 0 0 0 5px rgba(197, 255, 207, 0.14);
}

.ownership {
    margin-bottom: 0.75rem;
    color: rgba(240, 250, 244, 0.72);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.project-copy h3 {
    margin: 0 0 1.75rem;
    font-size: clamp(3.4rem, 6vw, 6.2rem);
    font-weight: 580;
    letter-spacing: -0.065em;
    line-height: 0.83;
}

.project-lead {
    margin-bottom: 1.15rem;
    color: #fff;
    font-size: clamp(1.05rem, 1.5vw, 1.25rem);
    line-height: 1.5;
}

.project-copy > p:not(.project-status, .ownership, .project-lead) {
    color: rgba(240, 250, 244, 0.72);
    font-size: 0.88rem;
}

.project-features {
    margin: 2rem 0 2.5rem;
    padding: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.18);
    list-style: none;
}

.project-features li {
    display: grid;
    grid-template-columns: 2rem 1fr;
    gap: 0.5rem;
    padding: 0.85rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.78rem;
}

.project-features span {
    color: #9cfff3;
    font-family: var(--mono);
    font-size: 0.65rem;
}

.project-visual {
    min-width: 0;
    position: relative;
    display: grid;
    align-content: center;
    margin: 0;
    padding: clamp(2rem, 5vw, 4.5rem) 0 clamp(2rem, 5vw, 4.5rem) clamp(1.5rem, 4vw, 4rem);
    overflow: hidden;
    background: #062d29;
}

.project-visual::before {
    content: "TJ";
    position: absolute;
    top: -2.2rem;
    right: -0.7rem;
    color: rgba(106, 243, 225, 0.045);
    font-family: var(--serif);
    font-size: 21rem;
    font-style: italic;
    line-height: 1;
}

.visual-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(5px);
}

.visual-orb-one {
    top: 6%;
    right: -8rem;
    width: 25rem;
    aspect-ratio: 1;
    background: radial-gradient(circle, rgba(72, 220, 203, 0.22), transparent 68%);
}

.visual-orb-two {
    bottom: -12rem;
    left: 10%;
    width: 28rem;
    aspect-ratio: 1;
    background: radial-gradient(circle, rgba(229, 182, 104, 0.15), transparent 66%);
}

.workspace-window {
    width: 120%;
    min-width: 39rem;
    position: relative;
    z-index: 2;
    overflow: hidden;
    border: 1px solid rgba(209, 241, 232, 0.17);
    border-radius: 1rem 0 0 1rem;
    background: #f8f9f6;
    color: #16211f;
    box-shadow: 0 35px 85px rgba(0, 0, 0, 0.38);
    transform: perspective(1400px) rotateY(-4deg) rotateX(1.5deg);
    transform-origin: center left;
}

.workspace-topbar {
    height: 3.65rem;
    display: grid;
    grid-template-columns: 1fr auto auto;
    align-items: center;
    gap: 1.4rem;
    padding: 0 1rem;
    border-bottom: 1px solid #dde4df;
    background: #fff;
    font-size: 0.63rem;
}

.workspace-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.workspace-brand span {
    width: 1.75rem;
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    border-radius: 0.48rem;
    background: #087e74;
    color: #fff;
    font-family: var(--serif);
    font-style: italic;
}

.workspace-saved {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: #60716b;
}

.workspace-saved i {
    width: 0.35rem;
    aspect-ratio: 1;
    border-radius: 50%;
    background: #18a779;
}

.workspace-compile {
    display: inline-block;
    padding: 0.48rem 0.75rem;
    border-radius: 0.42rem;
    background: #087e74;
    color: #fff;
    font-size: 0.58rem;
    font-weight: 750;
}

.workspace-body {
    min-height: 24rem;
    display: grid;
    grid-template-columns: 8.5rem minmax(14rem, 1fr) minmax(12rem, 0.9fr);
}

.workspace-files,
.workspace-code,
.workspace-preview {
    min-width: 0;
    padding: 1rem 0.8rem;
}

.workspace-files {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    border-right: 1px solid #dde4df;
    background: #f0f3ef;
}

.workspace-body small {
    display: block;
    margin-bottom: 0.65rem;
    color: #7b8984;
    font-size: 0.47rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.workspace-files span {
    padding: 0.35rem 0.45rem;
    border-radius: 0.3rem;
    color: #53625d;
    font-family: var(--mono);
    font-size: 0.49rem;
    white-space: nowrap;
}

.workspace-files span.active {
    background: #dcebe6;
    color: #0a655c;
}

.workspace-files span.nested {
    padding-left: 1rem;
}

.workspace-code {
    border-right: 1px solid #dde4df;
    background: #fbfcfa;
}

.workspace-code ol {
    margin: 0;
    padding-left: 2rem;
    color: #a1aaa6;
    font-family: var(--mono);
    font-size: 0.49rem;
    line-height: 2.25;
}

.workspace-code code {
    color: #44534e;
}

.workspace-code b {
    color: #087e74;
    font-weight: 650;
}

.workspace-code em {
    color: #8b5c9e;
    font-style: normal;
}

.workspace-preview {
    background: #e9eeea;
}

.paper {
    width: 78%;
    min-width: 8rem;
    aspect-ratio: 0.72;
    margin: 0.5rem auto;
    padding: 1.4rem 1.1rem;
    background: #fff;
    box-shadow: 0 5px 18px rgba(41, 62, 55, 0.12);
}

.paper i,
.paper b,
.paper span {
    display: block;
    background: #cbd2cf;
}

.paper i {
    width: 52%;
    height: 0.35rem;
    margin: 0 auto 0.65rem;
    background: #344943;
}

.paper b {
    width: 32%;
    height: 0.18rem;
    margin: 0 auto 1.2rem;
}

.paper span {
    width: 100%;
    height: 0.13rem;
    margin-bottom: 0.42rem;
}

.paper span:nth-of-type(2),
.paper span:nth-of-type(5) {
    width: 82%;
}

.ai-note {
    width: 16.5rem;
    position: absolute;
    z-index: 3;
    right: 1.25rem;
    bottom: 5.5rem;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 0.7rem;
    padding: 0.8rem 0.85rem;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 0.7rem;
    background: rgba(6, 36, 32, 0.88);
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.3);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
}

.ai-note > span {
    color: #75e4d6;
}

.ai-note p {
    margin: 0;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.58rem;
    line-height: 1.4;
}

.ai-note small {
    display: block;
    color: #fff;
    font-weight: 750;
}

.ai-note > i {
    padding: 0.3rem 0.45rem;
    border-radius: 0.3rem;
    background: #4bcbbb;
    color: #062d29;
    font-size: 0.49rem;
    font-style: normal;
    font-weight: 800;
}

.visual-caption {
    position: relative;
    z-index: 2;
    margin: 1.4rem 0 0;
    color: rgba(255, 255, 255, 0.48);
    font-family: var(--mono);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.selected-grid {
    margin-top: 1rem;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.selected-card {
    min-height: 23rem;
    display: flex;
    flex-direction: column;
    padding: clamp(1.5rem, 3vw, 2rem);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--surface);
    transition: border-color 250ms ease, transform 350ms var(--ease);
}

.selected-card:hover {
    transform: translateY(-0.35rem);
    border-color: var(--line-strong);
}

.selected-meta {
    margin-bottom: 4rem;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    color: var(--text-muted);
    font-family: var(--mono);
    font-size: 0.58rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.selected-meta > span {
    color: var(--turquoise);
}

.selected-card h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 650;
    letter-spacing: -0.035em;
}

.selected-card > p {
    color: var(--text-soft);
    font-size: 0.86rem;
}

/* Journey */
.journey-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: clamp(3rem, 8vw, 7rem);
}

.journey-column > h3 {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--line-strong);
    color: var(--turquoise);
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.timeline-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.timeline-list li {
    position: relative;
    padding: 0 0 3.25rem 2rem;
    border-left: 1px solid var(--line);
}

.timeline-list li:last-child {
    padding-bottom: 0;
    border-left-color: transparent;
}

.timeline-list li::before {
    content: "";
    position: absolute;
    top: 0.2rem;
    left: -0.31rem;
    width: 0.55rem;
    aspect-ratio: 1;
    border: 2px solid var(--ink);
    border-radius: 50%;
    background: var(--turquoise);
    box-shadow: 0 0 0 1px var(--turquoise);
}

.timeline-list time {
    display: block;
    margin-bottom: 0.65rem;
    color: var(--text-muted);
    font-family: var(--mono);
    font-size: 0.63rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.timeline-list h4 {
    margin-bottom: 0.35rem;
    font-size: 1.18rem;
    font-weight: 650;
    letter-spacing: -0.025em;
}

.timeline-list p {
    max-width: 30rem;
    margin-bottom: 0;
    color: var(--text-soft);
    font-size: 0.83rem;
}

.timeline-list .place {
    margin-bottom: 0.65rem;
    color: var(--turquoise);
    font-size: 0.75rem;
    font-weight: 650;
}

.toolkit {
    margin-top: clamp(4rem, 8vw, 7rem);
    padding-top: 2.5rem;
    border-top: 1px solid var(--line-strong);
}

.toolkit-groups {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.toolkit-groups strong {
    display: block;
    margin-bottom: 0.55rem;
    color: var(--text);
    font-size: 0.78rem;
}

.toolkit-groups p {
    margin: 0;
    color: var(--text-soft);
    font-size: 0.78rem;
    line-height: 1.8;
}

/* Contact */
.contact-section {
    overflow: hidden;
    border-top: 1px solid var(--line);
    background:
        radial-gradient(circle at 0 100%, rgba(63, 206, 190, 0.1), transparent 32rem),
        var(--ink-soft);
}

.contact-section::after {
    content: "";
    position: absolute;
    right: -12rem;
    bottom: -20rem;
    width: 42rem;
    aspect-ratio: 1;
    border: 1px solid var(--line);
    border-radius: 50%;
    box-shadow: 0 0 0 5rem rgba(87, 214, 200, 0.012), 0 0 0 10rem rgba(87, 214, 200, 0.008);
}

.contact-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: minmax(18rem, 0.78fr) minmax(27rem, 1.12fr);
    gap: clamp(3rem, 9vw, 8rem);
    align-items: start;
}

.contact-copy > p:not(.eyebrow) {
    max-width: 31rem;
    margin: 2rem 0 2.5rem;
    color: var(--text-soft);
}

.contact-links {
    display: grid;
}

.contact-links a {
    display: grid;
    grid-template-columns: 5rem 1fr auto;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--line);
    text-decoration: none;
    transition: color 180ms ease, padding 250ms var(--ease);
}

.contact-links a:hover {
    padding-left: 0.5rem;
    color: var(--turquoise);
}

.contact-links span {
    color: var(--text-muted);
    font-family: var(--mono);
    font-size: 0.62rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.contact-links strong {
    overflow: hidden;
    font-size: 0.78rem;
    font-weight: 650;
    text-overflow: ellipsis;
}

.contact-links i {
    font-style: normal;
}

.contact-form-card {
    padding: clamp(1.5rem, 4vw, 3rem);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-lg);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.form-heading {
    margin-bottom: 2.5rem;
    padding-bottom: 1.25rem;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    border-bottom: 1px solid var(--line);
}

.form-heading > span {
    font-weight: 720;
}

.form-heading p {
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.55rem;
    color: var(--text-muted);
    font-size: 0.68rem;
}

.form-heading .signal-dot {
    margin: 0;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.form-field {
    min-width: 0;
    margin-bottom: 1.35rem;
}

.form-field label {
    display: block;
    margin-bottom: 0.55rem;
    color: var(--text-soft);
    font-size: 0.72rem;
    font-weight: 700;
}

.form-field label span {
    color: var(--text-muted);
    font-weight: 500;
}

.form-field input,
.form-field textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 0.65rem;
    outline: none;
    background: var(--ink-soft);
    color: var(--text);
    font-size: 0.9rem;
    transition: border-color 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.form-field input {
    height: 3.25rem;
    padding: 0 0.85rem;
}

.form-field textarea {
    min-height: 9rem;
    padding: 0.8rem 0.85rem;
    resize: vertical;
}

.form-field input:hover,
.form-field textarea:hover {
    border-color: var(--line-strong);
}

.form-field input:focus,
.form-field textarea:focus {
    border-color: var(--turquoise);
    box-shadow: 0 0 0 3px var(--turquoise-soft);
}

.form-field input[aria-invalid="true"],
.form-field textarea[aria-invalid="true"] {
    border-color: var(--danger);
}

.field-hint,
.field-error {
    display: block;
    margin-top: 0.35rem;
    font-size: 0.62rem;
    line-height: 1.4;
}

.field-hint {
    color: var(--text-muted);
}

.field-error {
    min-height: 0.85rem;
    color: var(--danger);
}

.honeypot {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
}

.form-submit-row {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.form-submit-row > p {
    max-width: 13rem;
    margin: 0;
    color: var(--text-muted);
    font-size: 0.62rem;
    line-height: 1.4;
}

.submit-button {
    min-width: 10rem;
}

.submit-button[disabled] {
    transform: none;
    cursor: wait;
    opacity: 0.75;
}

.button-spinner {
    width: 1rem;
    aspect-ratio: 1;
    display: none;
    border: 2px solid rgba(6, 19, 16, 0.28);
    border-top-color: #061310;
    border-radius: 50%;
    animation: spin 700ms linear infinite;
}

.submit-button.is-loading .button-spinner {
    display: block;
}

.submit-button.is-loading .button-arrow {
    display: none;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.form-status {
    display: none;
    margin-top: 1.2rem;
    padding: 0.8rem 0.9rem;
    border: 1px solid var(--line);
    border-radius: 0.55rem;
    font-size: 0.75rem;
    line-height: 1.5;
}

.form-status:not(:empty) {
    display: block;
}

.form-status[data-state="success"] {
    border-color: rgba(121, 222, 192, 0.35);
    background: rgba(121, 222, 192, 0.08);
    color: var(--success);
}

.form-status[data-state="error"] {
    border-color: rgba(255, 149, 137, 0.35);
    background: rgba(255, 149, 137, 0.07);
    color: var(--danger);
}

.form-status[data-state="info"] {
    border-color: var(--line-strong);
    background: var(--turquoise-soft);
    color: var(--text-soft);
}

.form-status a,
.noscript-note a {
    font-weight: 750;
}

.noscript-note {
    color: var(--text-soft);
    font-size: 0.8rem;
}

/* Footer */
.site-footer {
    padding: 3rem 0;
    border-top: 1px solid var(--line);
    background: var(--ink);
}

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

.footer-brand {
    margin-bottom: 0.75rem;
}

.footer-grid > div > p,
.copyright {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.68rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-soft);
    font-size: 0.72rem;
    font-weight: 650;
    text-decoration: none;
}

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

.copyright {
    text-align: right;
}

.back-to-top {
    width: 3rem;
    height: 3rem;
    position: fixed;
    right: 1.25rem;
    bottom: 1.25rem;
    z-index: 900;
    display: grid;
    place-items: center;
    border: 1px solid var(--line-strong);
    border-radius: 50%;
    background: var(--header-bg);
    color: var(--text);
    cursor: pointer;
    opacity: 0;
    transform: translateY(1rem);
    pointer-events: none;
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    transition: opacity 200ms ease, transform 250ms var(--ease), background 180ms ease;
}

.back-to-top.is-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.back-to-top:hover {
    background: var(--turquoise);
    color: #07110f;
}

.back-to-top svg {
    width: 1.2rem;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.6;
}

/* Progressive reveal. Content remains visible if JavaScript is unavailable. */
.js .reveal-ready {
    opacity: 0;
    transform: translateY(1.4rem);
    transition: opacity 650ms var(--ease), transform 650ms var(--ease);
}

.js .reveal-ready.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive layout */
@media (max-width: 1080px) {
    .hero-grid {
        grid-template-columns: minmax(0, 1.05fr) minmax(19rem, 0.65fr);
        gap: 3rem;
    }

    .hero h1 {
        font-size: clamp(3.5rem, 7vw, 5.7rem);
    }

    .portrait-note {
        right: -0.5rem;
    }

    .flagship-project {
        grid-template-columns: minmax(21rem, 0.9fr) minmax(0, 1.1fr);
    }

    .workspace-window {
        min-width: 36rem;
    }
}

@media (max-width: 900px) {
    .site-nav {
        position: fixed;
        inset: 5.25rem 0 auto;
        width: 100%;
        height: calc(100svh - 5.25rem);
        display: grid;
        align-content: start;
        gap: 0;
        padding: 1.5rem;
        overflow-y: auto;
        border-bottom: 1px solid var(--line);
        background: var(--ink);
        opacity: 0;
        transform: translateY(-0.75rem);
        visibility: hidden;
        transition: opacity 200ms ease, transform 250ms var(--ease);
    }

    .site-nav.is-open {
        opacity: 1;
        transform: translateY(0);
        visibility: visible;
    }

    .site-nav a {
        padding: 1rem 0;
        border-bottom: 1px solid var(--line);
        font-size: 1.25rem;
    }

    .site-nav a::after {
        display: none;
    }

    .menu-toggle {
        display: grid;
    }

    .hero {
        min-height: auto;
        padding-top: 9rem;
    }

    .hero-grid {
        grid-template-columns: minmax(0, 1.1fr) minmax(18rem, 0.65fr);
        gap: 2rem;
    }

    .hero h1 {
        font-size: clamp(3.2rem, 7.2vw, 4.9rem);
    }

    .hero-facts {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-facts li:last-child {
        display: none;
    }

    .portrait-stage {
        padding-inline: 0;
    }

    .portrait-note {
        width: 86%;
        right: -0.5rem;
    }

    .scroll-cue {
        display: none;
    }

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

    .expertise-card:last-child {
        grid-column: 1 / -1;
        min-height: 25rem;
    }

    .flagship-project {
        grid-template-columns: 1fr;
    }

    .project-visual {
        min-height: 38rem;
    }

    .workspace-window {
        width: 108%;
        min-width: 40rem;
    }

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

    .selected-card:last-child {
        grid-column: 1 / -1;
        min-height: 19rem;
    }

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

    .contact-copy {
        max-width: 42rem;
    }
}

@media (max-width: 700px) {
    .section-shell,
    .nav-shell {
        width: min(calc(100% - 2rem), var(--shell));
    }

    .brand-name {
        display: none;
    }

    .hero {
        padding: 8rem 0 4.5rem;
    }

    .hero::before {
        top: 31rem;
        right: -16rem;
        width: 33rem;
        height: 33rem;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 3.5rem;
    }

    .hero h1 {
        font-size: clamp(3.1rem, 14vw, 5.3rem);
    }

    .hero h1 em {
        font-size: 0.92em;
        white-space: normal;
    }

    .hero-intro {
        margin-top: 1.5rem;
        font-size: 1rem;
    }

    .hero-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .hero-actions .button {
        width: 100%;
    }

    .hero-facts {
        grid-template-columns: 1fr 1fr;
        gap: 0.8rem;
    }

    .portrait-stage {
        width: min(90%, 27rem);
        justify-self: center;
    }

    .portrait-frame {
        aspect-ratio: 0.9;
    }

    .hero-network {
        top: 69%;
        left: 9%;
        width: 53rem;
    }

    .profile-grid,
    .split-heading,
    .journey-grid {
        grid-template-columns: 1fr;
    }

    .profile-grid,
    .split-heading {
        gap: 2rem;
    }

    .profile-copy {
        padding-top: 0;
    }

    .split-heading > p {
        max-width: 32rem;
    }

    .expertise-grid,
    .selected-grid {
        grid-template-columns: 1fr;
    }

    .expertise-card,
    .expertise-card:last-child {
        min-height: 25rem;
        grid-column: auto;
    }

    .expertise-icon {
        margin: 2.6rem 0 2.2rem;
    }

    .project-copy {
        padding-block: 2.5rem 3rem;
    }

    .project-copy h3 {
        font-size: clamp(3.4rem, 16vw, 5.2rem);
    }

    .project-visual {
        min-height: 31rem;
        padding: 3rem 0 3rem 1.25rem;
    }

    .workspace-window {
        min-width: 33rem;
        transform: none;
    }

    .workspace-body {
        min-height: 20rem;
        grid-template-columns: 7.5rem 1fr 11rem;
    }

    .selected-card,
    .selected-card:last-child {
        min-height: 20rem;
        grid-column: auto;
    }

    .selected-meta {
        margin-bottom: 3rem;
    }

    .journey-grid {
        gap: 4rem;
    }

    .toolkit-groups {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .form-heading {
        align-items: flex-start;
        flex-direction: column;
    }

    .form-submit-row {
        align-items: stretch;
        flex-direction: column;
    }

    .form-submit-row > p {
        max-width: none;
    }

    .submit-button {
        width: 100%;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        align-items: start;
        gap: 2rem;
    }

    .footer-brand .brand-name {
        display: inline;
    }

    .copyright {
        text-align: left;
    }
}

@media (max-width: 430px) {
    .section-shell,
    .nav-shell {
        width: min(calc(100% - 1.4rem), var(--shell));
    }

    .nav-shell {
        min-height: 4.75rem;
    }

    .nav-actions {
        gap: 0.4rem;
    }

    .nav-cv-link {
        min-height: 2.65rem;
        padding-inline: 0.72rem;
        font-size: 0.68rem;
    }

    .site-nav {
        inset-block-start: 4.75rem;
        height: calc(100svh - 4.75rem);
    }

    .hero {
        padding-top: 7rem;
    }

    .hero h1 {
        font-size: clamp(2.8rem, 15vw, 4.2rem);
    }

    .hero-facts {
        grid-template-columns: 1fr;
    }

    .hero-facts li:nth-child(2) {
        display: none;
    }

    .portrait-stage {
        width: 94%;
    }

    .portrait-note {
        width: 92%;
        right: -0.15rem;
    }

    .project-status {
        align-items: flex-start;
    }

    .project-features li {
        grid-template-columns: 1.6rem 1fr;
    }

    .workspace-window {
        min-width: 29rem;
    }

    .workspace-body {
        grid-template-columns: 6.7rem 1fr 9rem;
    }

    .ai-note {
        right: 0.75rem;
        bottom: 3.8rem;
    }

    .contact-form-card {
        border-radius: 1.25rem;
    }

    .contact-links a {
        grid-template-columns: 4.2rem minmax(0, 1fr) auto;
    }

    .back-to-top {
        right: 0.75rem;
        bottom: 0.75rem;
    }
}

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

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .js .reveal-ready {
        opacity: 1;
        transform: none;
    }
}

@media (forced-colors: active) {
    .signal-dot,
    .project-status span,
    .timeline-list li::before {
        border: 1px solid ButtonText;
    }

    .button,
    .icon-button,
    .menu-toggle,
    .expertise-card,
    .selected-card,
    .contact-form-card {
        border: 1px solid ButtonText;
    }
}