:root[data-theme="dark"] {
    color-scheme: dark;
    --paper: #111923;
    --bright: #192431;
    --paper-bright: #192431;
    --ink: #eef2f4;
    --soft: #b7c2cc;
    --ink-soft: #b7c2cc;
    --line: #35414d;
    --blue: #243746;
    --shadow-soft: 0 16px 35px rgb(0 0 0 / 20%), 0 2px 6px rgb(0 0 0 / 14%);
    --shadow-lift: 0 24px 50px rgb(0 0 0 / 35%), 0 6px 12px rgb(0 0 0 / 18%);
}

:root[data-theme="dark"] body {
    color: var(--ink);
    background: linear-gradient(135deg, #111923 0%, #151f2a 50%, #1a2934 100%);
}

:root[data-theme="dark"] body::before {
    opacity: .12;
    background-image: radial-gradient(#d5e0e8 .55px, transparent .55px);
}

:root[data-theme="dark"] header {
    border-color: rgb(255 255 255 / 10%);
    background: rgb(17 25 35 / 90%);
}

:root[data-theme="dark"] .page-hero {
    background: linear-gradient(120deg, #1e303c, #171f2a 78%);
    box-shadow: inset 0 -1px rgb(255 255 255 / 7%);
}

:root[data-theme="dark"] .dark {
    color: #f1f4f6;
}

:root[data-theme="dark"] .dark-band,
:root[data-theme="dark"] .contact {
    color: #f1f4f6;
    background: linear-gradient(140deg, #202d43, #111923 65%, #0c121a);
}

:root[data-theme="dark"] .journal-note {
    border-color: rgb(255 255 255 / 12%);
    background: linear-gradient(135deg, #202e3a, #263845);
}

:root[data-theme="dark"] .card {
    color: var(--ink);
    border-color: var(--line);
    background: linear-gradient(145deg, #202d39, #192431);
}

:root[data-theme="dark"] .card h3,
:root[data-theme="dark"] .card strong,
:root[data-theme="dark"] .card p {
    color: var(--ink) !important;
}

:root[data-theme="dark"] .card.yellow {
    color: #182130;
    background: linear-gradient(145deg, #f8c843, #f4bd31);
}

:root[data-theme="dark"] .card.yellow h3,
:root[data-theme="dark"] .card.yellow strong,
:root[data-theme="dark"] .card.yellow p {
    color: #182130 !important;
}

:root[data-theme="dark"] .service,
:root[data-theme="dark"] .project-card:not(:nth-child(2)),
:root[data-theme="dark"] .stat,
:root[data-theme="dark"] .statement {
    color: var(--ink);
    background: #192431;
}

:root[data-theme="dark"] .services-grid,
:root[data-theme="dark"] .stats {
    background: var(--line);
}

:root[data-theme="dark"] .service:hover {
    color: #f1f4f6 !important;
    border-color: var(--yellow) !important;
    background-color: #263746 !important;
}

:root[data-theme="dark"] .service:hover h3 {
    color: #fffefa !important;
}

:root[data-theme="dark"] .service:hover p {
    color: #eef2f4 !important;
}

:root[data-theme="dark"] .service:hover .service-number {
    color: var(--yellow) !important;
}

:root[data-theme="dark"] .process {
    color: #eef2f4;
    background: #111923;
    transition: color .2s ease, background-color .2s ease;
}

:root[data-theme="dark"] .process h3 {
    color: #fffefa;
}

:root[data-theme="dark"] .process p {
    color: #b7c2cc;
}

:root[data-theme="dark"] .process:hover {
    color: #eef2f4 !important;
    background-color: #263746 !important;
    box-shadow: inset 0 3px var(--yellow);
}

:root[data-theme="dark"] .process:hover h3 {
    color: #fffefa !important;
}

:root[data-theme="dark"] .process:hover p {
    color: #eef2f4 !important;
}

:root[data-theme="dark"] .process:hover .process-no {
    color: var(--yellow) !important;
}

:root[data-theme="dark"] .project-card:nth-child(2) {
    color: #182130;
}

:root[data-theme="dark"] .article-card,
:root[data-theme="dark"] .article-grid > .empty-state,
:root[data-theme="dark"] .contact-form,
:root[data-theme="dark"] form {
    color: var(--ink);
    border-color: var(--line);
    background: #192431;
}

:root[data-theme="dark"] input,
:root[data-theme="dark"] select,
:root[data-theme="dark"] textarea {
    color: var(--ink);
    border-color: var(--line);
    background: #111923;
}

:root[data-theme="dark"] footer {
    background: #0d141d;
}

:root[data-theme="dark"] .menu-toggle,
:root[data-theme="dark"] .theme-toggle {
    color: var(--ink);
}

:root[data-theme="dark"] .brand-mark {
    background-color: #fffefa;
}

:root[data-theme="dark"] .button {
    color: #111923;
    border-color: #eef2f4;
    background: #eef2f4;
}

:root[data-theme="dark"] .button.light {
    color: #111923;
    border-color: #fffefa;
    background: #fffefa;
}

.theme-toggle {
    display: inline-grid;
    width: 38px;
    height: 38px;
    flex: 0 0 38px;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: 50%;
    color: var(--ink);
    background: transparent;
    font-size: 19px;
    line-height: 1;
    cursor: pointer;
    transition: color .2s ease, background .2s ease, border-color .2s ease, transform .2s ease;
}

.theme-toggle:hover {
    border-color: var(--yellow);
    background: rgb(244 189 49 / 14%);
    transform: rotate(-10deg);
}

.nav {
    gap: 14px;
}

.theme-toggle:focus-visible,
.menu-toggle:focus-visible {
    outline: 3px solid var(--yellow);
    outline-offset: 3px;
}

@media (max-width: 800px) {
    .theme-toggle {
        margin-left: auto;
    }

    .nav.open .theme-toggle {
        margin-left: 0;
    }
}