.about-page .about-page__main {
    max-width: 1180px;
    padding-bottom: 1px;
}

.about-section-head {
    display: grid;
    grid-template-columns: minmax(180px, 0.34fr) minmax(0, 0.66fr);
    gap: clamp(2rem, 7vw, 7rem);
    align-items: start;
    margin-bottom: 2.4rem;
}

.about-section-head__label {
    color: var(--theme-accent);
    font-family: var(--font-mono);
    font-size: 0.64rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.about-section-head h2 {
    max-width: 760px;
    margin: -0.25rem 0 0;
    color: var(--theme-text);
    font-family: var(--font-heading);
    font-size: clamp(2.25rem, 4.7vw, 4.7rem);
    line-height: 0.98;
    letter-spacing: -0.06em;
}

.about-section-head p {
    max-width: 650px;
    margin: 1.2rem 0 0;
    color: var(--theme-muted);
    font-size: 0.92rem;
    line-height: 1.8;
}

.about-overview,
.about-expertise,
.about-skill-tree,
.about-work,
.about-toolkit,
.about-process {
    padding: clamp(4.5rem, 9vw, 8rem) 0;
    border-top: 1px solid var(--theme-border);
}

.about-page .about-expertise {
    padding: clamp(3.5rem, 6vw, 5rem) 0;
}

.about-overview {
    display: grid;
    grid-template-columns: minmax(240px, 0.35fr) minmax(0, 0.65fr);
    gap: clamp(2rem, 8vw, 8rem);
}

.about-overview h2 {
    margin: 0;
    font-family: var(--font-heading);
    font-size: clamp(2.4rem, 4.6vw, 4.6rem);
    line-height: 0.98;
    letter-spacing: -0.06em;
}

.about-overview__copy > p {
    margin: 0 0 1.2rem;
    color: var(--theme-muted);
    font-size: clamp(0.92rem, 1.25vw, 1.06rem);
    line-height: 1.85;
}

.about-overview__details {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem 2rem;
    margin: 2.3rem 0 0;
    padding-top: 1.5rem;
    border-top: 1px solid var(--theme-border);
}

.about-overview__details div { min-width: 0; }
.about-overview__details dt { color: var(--theme-muted); font-size: 0.67rem; font-weight: 750; text-transform: uppercase; letter-spacing: 0.08em; }
.about-overview__details dd { margin: 0.38rem 0 0; color: var(--theme-text); font-size: 0.84rem; font-weight: 750; }

.about-capability-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-top: 1px solid var(--theme-border);
    border-bottom: 1px solid var(--theme-border);
}

.about-capability {
    min-height: 235px;
    padding: clamp(1.6rem, 3vw, 2.4rem);
    border-left: 1px solid var(--theme-border);
    background: transparent;
    transition: background-color 180ms ease, transform 180ms ease;
}

.about-capability:first-child { border-left: 0; }
.about-capability:hover { background: color-mix(in srgb, var(--theme-accent) 4%, transparent); transform: translateY(-3px); }
.about-capability > span { color: var(--theme-accent); font-family: var(--font-mono); font-size: 0.62rem; font-weight: 800; letter-spacing: 0.1em; }
.about-capability h3 { margin: 3rem 0 0.75rem; font-family: var(--font-heading); font-size: 1.35rem; letter-spacing: -0.035em; }
.about-capability p { margin: 0; color: var(--theme-muted); font-size: 0.82rem; line-height: 1.7; }
.about-capability ul { margin: 1.35rem 0 0; padding: 0; list-style: none; }
.about-capability li { padding: 0.43rem 0; border-top: 1px solid color-mix(in srgb, var(--theme-border) 66%, transparent); color: var(--theme-text); font-size: 0.72rem; font-weight: 700; }

.about-skill-tree {
    padding: clamp(4rem, 8vw, 7rem) 0;
}

.skill-tree {
    --tree-line: color-mix(in srgb, var(--theme-accent) 34%, var(--theme-border));
    position: relative;
}

.skill-tree__root {
    display: grid;
    position: relative;
    z-index: 1;
    width: min(100%, 390px);
    margin: 0 auto;
    padding: 1.15rem 1.25rem;
    border: 1px solid color-mix(in srgb, var(--theme-accent) 42%, var(--theme-border));
    border-radius: 14px;
    background: linear-gradient(135deg, color-mix(in srgb, var(--theme-accent) 10%, var(--theme-surface)), var(--theme-surface));
    box-shadow: 0 16px 45px color-mix(in srgb, #000 18%, transparent);
    text-align: center;
}

.skill-tree__root::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    width: 1px;
    height: 2rem;
    background: var(--tree-line);
}

.skill-tree__root > span,
.skill-branch__head > span {
    color: var(--theme-accent);
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.skill-tree__root strong {
    margin-top: 0.35rem;
    color: var(--theme-text);
    font-family: var(--font-heading);
    font-size: 1.08rem;
    letter-spacing: -0.025em;
}

.skill-tree__root small {
    margin-top: 0.3rem;
    color: var(--theme-muted);
    font-size: 0.7rem;
    line-height: 1.55;
}

.skill-tree__branches {
    display: grid;
    position: relative;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    padding-top: 4rem;
}

.skill-tree__branches::before {
    content: "";
    position: absolute;
    top: 2rem;
    right: calc(16.666% - 0.34rem);
    left: calc(16.666% - 0.34rem);
    height: 1px;
    background: var(--tree-line);
}

.skill-branch {
    display: flex;
    position: relative;
    min-width: 0;
    min-height: 410px;
    flex-direction: column;
    padding: 1.35rem;
    border: 1px solid var(--theme-border);
    border-radius: 14px;
    background: color-mix(in srgb, var(--theme-surface) 72%, transparent);
    transition: border-color 180ms ease, background-color 180ms ease, transform 180ms ease;
}

.skill-branch::before {
    content: "";
    position: absolute;
    bottom: 100%;
    left: 50%;
    width: 1px;
    height: 2rem;
    background: var(--tree-line);
}

.skill-branch::after {
    content: "";
    position: absolute;
    bottom: calc(100% + 1.72rem);
    left: calc(50% - 3px);
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--theme-accent);
    box-shadow: 0 0 0 5px color-mix(in srgb, var(--theme-accent) 12%, transparent);
}

.skill-branch:hover {
    border-color: color-mix(in srgb, var(--theme-accent) 34%, var(--theme-border));
    background: color-mix(in srgb, var(--theme-accent) 4%, var(--theme-surface));
    transform: translateY(-4px);
}

.skill-branch__head {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 0.8rem;
    align-items: start;
}

.skill-branch__head > span {
    display: grid;
    width: 30px;
    height: 30px;
    place-items: center;
    border: 1px solid color-mix(in srgb, var(--theme-accent) 30%, var(--theme-border));
    border-radius: 8px;
    background: color-mix(in srgb, var(--theme-accent) 7%, transparent);
}

.skill-branch__head h3 {
    margin: 0;
    color: var(--theme-text);
    font-family: var(--font-heading);
    font-size: 1rem;
    letter-spacing: -0.025em;
}

.skill-branch__head p {
    margin: 0.35rem 0 0;
    color: var(--theme-muted);
    font-size: 0.7rem;
    line-height: 1.55;
}

.skill-branch__nodes {
    display: grid;
    gap: 0.45rem;
    margin: 1.35rem 0 0;
    padding: 0;
    list-style: none;
}

.skill-branch__nodes li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    min-height: 40px;
    padding: 0.55rem 0.65rem;
    border: 1px solid color-mix(in srgb, var(--theme-border) 74%, transparent);
    border-radius: 9px;
    background: color-mix(in srgb, var(--theme-surface-soft) 66%, transparent);
}

.skill-branch__nodes li > span {
    color: var(--theme-text);
    font-size: 0.71rem;
    font-weight: 750;
}

.skill-branch__nodes small {
    flex: 0 0 auto;
    padding: 0.17rem 0.38rem;
    border: 1px solid var(--theme-border);
    border-radius: 999px;
    font-family: var(--font-mono);
    font-size: 0.52rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.skill-branch__nodes small[data-level="core"] { border-color: color-mix(in srgb, #4ade80 35%, var(--theme-border)); color: #7ee2a1; }
.skill-branch__nodes small[data-level="production"] { border-color: color-mix(in srgb, var(--theme-accent) 38%, var(--theme-border)); color: var(--theme-accent); }
.skill-branch__nodes small[data-level="applied"] { border-color: color-mix(in srgb, #c084fc 34%, var(--theme-border)); color: #caa5f1; }

.skill-branch__proof {
    margin: auto 0 0;
    padding-top: 1rem;
    border-top: 1px solid color-mix(in srgb, var(--theme-border) 68%, transparent);
    color: var(--theme-muted);
    font-size: 0.65rem;
    line-height: 1.55;
}

.skill-tree__legend {
    display: flex;
    justify-content: center;
    gap: 0.65rem 1.4rem;
    margin-top: 1.25rem;
    color: var(--theme-muted);
    font-size: 0.62rem;
}

.skill-tree__legend span {
    display: inline-flex;
    align-items: center;
    gap: 0.38rem;
}

.skill-tree__legend i {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.skill-tree__legend i[data-level="core"] { background: #4ade80; }
.skill-tree__legend i[data-level="production"] { background: var(--theme-accent); }
.skill-tree__legend i[data-level="applied"] { background: #c084fc; }
.skill-tree__legend strong { color: var(--theme-text); font-size: inherit; }

.about-work__list {
    border-top: 1px solid var(--theme-border);
}

.about-work-item {
    display: grid;
    grid-template-columns: 155px minmax(0, 1fr) auto;
    gap: clamp(1.5rem, 4vw, 4rem);
    align-items: center;
    padding: 2rem 0;
    border-bottom: 1px solid var(--theme-border);
    color: inherit;
    text-decoration: none;
}

.about-work-item__type { color: var(--theme-accent); font-family: var(--font-mono); font-size: 0.62rem; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; }
.about-work-item h3 { margin: 0; color: var(--theme-text); font-family: var(--font-heading); font-size: clamp(1.25rem, 2.2vw, 1.8rem); letter-spacing: -0.035em; transition: color 180ms ease, transform 180ms ease; }
.about-work-item p { max-width: 690px; margin: 0.55rem 0 0; color: var(--theme-muted); font-size: 0.78rem; line-height: 1.65; }
.about-work-item__arrow { color: var(--theme-muted); font-size: 1.35rem; transition: color 180ms ease, transform 180ms ease; }
.about-work-item:hover h3 { color: var(--theme-accent); transform: translateX(5px); }
.about-work-item:hover .about-work-item__arrow { color: var(--theme-accent); transform: translateX(5px); }

.about-toolkit__grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
}

.about-toolkit__group {
    padding: 1.5rem;
    border-top: 2px solid var(--theme-accent);
    background: color-mix(in srgb, var(--theme-surface) 70%, transparent);
}

.about-toolkit__group h3 { margin: 0 0 1.25rem; font-size: 0.78rem; letter-spacing: 0.02em; }
.about-toolkit__group ul { display: flex; flex-wrap: wrap; gap: 0.48rem; margin: 0; padding: 0; list-style: none; }
.about-toolkit__group li { padding: 0.35rem 0.55rem; border: 1px solid var(--theme-border); border-radius: 999px; color: var(--theme-muted); font-size: 0.67rem; font-weight: 700; }

.about-process__steps {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: about-step;
}

.about-process__steps li {
    min-height: 230px;
    padding: 1.6rem;
    border-top: 1px solid var(--theme-border);
    border-left: 1px solid var(--theme-border);
    counter-increment: about-step;
}

.about-process__steps li:first-child { border-left: 0; }
.about-process__steps li::before { content: "0" counter(about-step); display: block; color: var(--theme-accent); font-family: var(--font-mono); font-size: 0.62rem; font-weight: 800; }
.about-process__steps h3 { margin: 3.8rem 0 0.7rem; font-size: 1rem; }
.about-process__steps p { margin: 0; color: var(--theme-muted); font-size: 0.74rem; line-height: 1.65; }

.about-page .about-contact {
    margin-top: 0;
    overflow: hidden;
    position: relative;
}

.about-page .about-contact::before {
    content: "";
    position: absolute;
    width: 280px;
    height: 280px;
    right: -120px;
    bottom: -190px;
    border: 1px solid color-mix(in srgb, var(--theme-accent) 35%, transparent);
    border-radius: 50%;
}

@media (max-width: 900px) {
    .about-section-head,
    .about-overview { grid-template-columns: 1fr; gap: 1.4rem; }
    .about-capability-grid { grid-template-columns: 1fr; }
    .about-capability { min-height: 0; border-top: 1px solid var(--theme-border); border-left: 0; }
    .about-capability:first-child { border-top: 0; }
    .about-capability h3 { margin-top: 2.5rem; }
    .about-toolkit__grid,
    .about-process__steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .about-process__steps li:nth-child(3) { border-left: 0; }
    .skill-tree__branches { grid-template-columns: 1fr; gap: 0.75rem; padding-top: 2rem; }
    .skill-tree__branches::before { display: none; }
    .skill-branch { min-height: 0; }
    .skill-branch::before,
    .skill-branch::after { display: none; }
    .skill-tree__root::after { height: 2rem; }
    .skill-branch__proof { margin-top: 1.25rem; }
    .skill-tree__legend { flex-wrap: wrap; }
}

@media (max-width: 620px) {
    .about-overview__details,
    .about-toolkit__grid,
    .about-process__steps { grid-template-columns: 1fr; }
    .about-work-item { grid-template-columns: 1fr auto; gap: 0.65rem 1rem; }
    .about-work-item__type { grid-column: 1 / -1; }
    .about-process__steps li { min-height: 0; border-left: 0; }
    .about-process__steps h3 { margin-top: 2rem; }
}

@media (prefers-reduced-motion: reduce) {
    .about-capability,
    .skill-branch,
    .about-work-item h3,
    .about-work-item__arrow { transition: none; }
}