/* SOLARIS THEME */
:root,
:root[data-theme="dark"] {
    --solaris-bg: #0b1426;
    --solaris-surface: #0b1426;
    --solaris-border: #293a54;
    --solaris-border-strong: #3e5878;
    --solaris-accent: #7cccf0;
    --solaris-accent-rgb: 124, 204, 240;
    --solaris-accent-soft: rgba(124, 204, 240, 0.09);
    --solaris-text: #eef5ff;
    --solaris-muted: #b1bfd3;
    --solaris-subtle: #7f90a8;

    --theme: var(--solaris-bg);
    --entry: var(--solaris-bg);
    --primary: var(--solaris-text);
    --secondary: var(--solaris-muted);
    --tertiary: #14213a;
    --content: #d8e3f2;
    --code-block-bg: #08101f;
    --code-bg: #14213a;
    --border: var(--solaris-border);
    color-scheme: dark;
}

:root[data-theme="light"] {
    --solaris-bg: #f5f8fc;
    --solaris-surface: #f5f8fc;
    --solaris-border: #c8d5e5;
    --solaris-border-strong: #87a2bd;
    --solaris-accent: #1478a6;
    --solaris-accent-rgb: 20, 120, 166;
    --solaris-accent-soft: rgba(20, 120, 166, 0.08);
    --solaris-text: #17263c;
    --solaris-muted: #50637b;
    --solaris-subtle: #6c7f95;

    --theme: var(--solaris-bg);
    --entry: var(--solaris-bg);
    --primary: var(--solaris-text);
    --secondary: var(--solaris-muted);
    --tertiary: #e7eef6;
    --content: #263950;
    --code-block-bg: #e9f0f7;
    --code-bg: #e3ebf4;
    --border: var(--solaris-border);
    color-scheme: light;
}

html,
body,
body.dark,
.list,
.header,
.footer,
main {
    background: var(--solaris-bg) !important;
    transition: background-color 0.25s ease, color 0.25s ease;
}

body {
    color: var(--solaris-text) !important;
}

.header {
    border-bottom: 1px solid var(--solaris-border);
}

.footer {
    border-top: 1px solid var(--solaris-border);
}

a {
    color: var(--solaris-accent) !important;
    transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

a:hover {
    color: var(--solaris-text) !important;
    text-shadow: 0 0 9px rgba(var(--solaris-accent-rgb), 0.38);
}

.logo img,
.hero-logo {
    border-radius: 12px;
    filter: drop-shadow(0 0 12px rgba(var(--solaris-accent-rgb), 0.24));
}

.logo > a {
    color: var(--solaris-text) !important;
}

:root[data-theme="light"] .hero-logo {
    box-shadow: 0 14px 34px rgba(23, 38, 60, 0.14);
}

#theme-toggle {
    display: inline-grid;
    width: 38px;
    height: 38px;
    padding: 6px;
    border: 1px solid var(--solaris-border);
    border-radius: 999px;
    color: var(--solaris-muted);
    place-items: center;
    transition: color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

#theme-toggle:hover,
#theme-toggle:focus-visible {
    border-color: var(--solaris-accent);
    color: var(--solaris-accent);
    box-shadow: 0 0 14px rgba(var(--solaris-accent-rgb), 0.2);
    outline: none;
}

.header .menu li a,
#menu a {
    color: var(--solaris-muted) !important;
}

.header .menu li a:hover,
#menu a:hover,
#menu .active {
    color: var(--solaris-text) !important;
}

#menu .active {
    border-bottom-color: var(--solaris-accent);
}

div[style*="border-left"]:hover {
    border-left-color: var(--solaris-accent) !important;
}

/* RESEARCH AND ACTIVITIES OVERVIEW PAGES */
.page-intro {
    max-width: 760px;
    margin: 0 0 2.5rem;
    color: var(--solaris-muted);
    font-size: 1.08rem;
    line-height: 1.75;
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.25rem;
    margin: 1rem 0 2.5rem;
}

.research-vision,
.research-directions {
    width: min(1160px, calc(100vw - 3rem));
    margin-right: 0;
    margin-left: 50%;
    transform: translateX(-50%);
}

.research-vision {
    position: relative;
    margin-bottom: clamp(2.5rem, 6vw, 4.5rem);
    padding: clamp(1.6rem, 4vw, 2.5rem) 0 clamp(1.8rem, 4vw, 3rem);
    border-bottom: 1px solid var(--solaris-border);
}

.research-vision::after {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: min(190px, 36%);
    height: 2px;
    background: var(--solaris-accent);
    box-shadow: 0 0 16px rgba(var(--solaris-accent-rgb), 0.55);
    content: "";
}

.research-eyebrow,
.research-direction-kicker {
    margin: 0 0 0.65rem;
    color: var(--solaris-accent);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.13em;
    text-shadow: 0 0 10px rgba(var(--solaris-accent-rgb), 0.25);
    text-transform: uppercase;
}

.research-intro {
    max-width: 860px;
    margin-bottom: 0;
    color: var(--solaris-text);
    font-size: clamp(1.15rem, 2vw, 1.42rem);
    line-height: 1.7;
}

.research-directions {
    display: grid;
    gap: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 3rem;
}

.research-direction {
    position: relative;
    display: grid;
    overflow: hidden;
    padding: clamp(1.4rem, 3.5vw, 2.5rem);
    border: 1px solid var(--solaris-border);
    border-radius: 18px;
    background: linear-gradient(125deg, rgba(var(--solaris-accent-rgb), 0.065), transparent 36%), var(--solaris-bg);
    box-shadow: 0 14px 45px rgba(2, 11, 26, 0.12), 0 0 24px rgba(var(--solaris-accent-rgb), 0.06);
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    gap: clamp(1.8rem, 5vw, 4rem);
    align-items: center;
    isolation: isolate;
    transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}

.research-direction::before {
    position: absolute;
    z-index: -1;
    top: -35%;
    left: -12%;
    width: 380px;
    height: 380px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(var(--solaris-accent-rgb), 0.09), transparent 68%);
    content: "";
    pointer-events: none;
}

.research-direction:hover,
.research-direction:focus-within {
    border-color: var(--solaris-border-strong);
    box-shadow: 0 18px 50px rgba(2, 11, 26, 0.16), 0 0 30px rgba(var(--solaris-accent-rgb), 0.12);
    transform: translateY(-3px);
}

.research-direction--reverse .research-direction-copy {
    order: 2;
}

.research-direction--reverse .research-direction-media {
    order: 1;
}

.research-direction-copy {
    position: relative;
    min-width: 0;
}

.research-direction-number {
    position: absolute;
    top: -1.3rem;
    right: 0;
    color: rgba(var(--solaris-accent-rgb), 0.09);
    font-size: clamp(4.8rem, 9vw, 7.5rem);
    font-weight: 900;
    letter-spacing: -0.08em;
    line-height: 1;
    pointer-events: none;
    user-select: none;
}

.research-direction-copy h2 {
    position: relative;
    max-width: 520px;
    margin: 0 0 1.1rem;
    color: var(--solaris-text);
    font-size: clamp(1.8rem, 3.5vw, 2.65rem);
    letter-spacing: -0.035em;
    line-height: 1.08;
}

.research-direction-copy > p:not(.research-direction-kicker) {
    position: relative;
    margin: 0 0 0.9rem;
    color: var(--solaris-muted);
    font-size: 1rem;
    line-height: 1.7;
}

.research-focus-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1.25rem 0 1.35rem;
    padding: 0;
    list-style: none;
}

.research-focus-list li {
    margin: 0;
    padding: 0.38rem 0.68rem;
    border: 1px solid var(--solaris-border-strong);
    border-radius: 999px;
    color: var(--solaris-accent);
    font-size: 0.74rem;
    font-weight: 750;
    line-height: 1.35;
}

.research-paper-link {
    display: inline-flex;
    padding: 0.55rem 0.85rem;
    border: 1px solid rgba(var(--solaris-accent-rgb), 0.48);
    border-radius: 8px;
    color: var(--solaris-accent) !important;
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.035em;
    text-decoration: none;
    text-transform: uppercase;
}

.research-paper-link:hover,
.research-paper-link:focus-visible {
    border-color: var(--solaris-accent);
    background: var(--solaris-accent-soft);
    color: var(--solaris-text) !important;
    outline: none;
}

.research-direction-media {
    min-width: 0;
    margin: 0;
}

.research-figure-frame {
    display: grid;
    min-height: 330px;
    overflow: hidden;
    padding: clamp(0.45rem, 1.1vw, 0.75rem);
    border: 1px solid rgba(20, 120, 166, 0.2);
    border-radius: 14px;
    background: #fff;
    box-shadow: 0 12px 34px rgba(2, 11, 26, 0.16);
    place-items: center;
}

.research-figure-frame img {
    width: 100%;
    height: 100%;
    max-height: 430px;
    border-radius: 9px;
    object-fit: contain;
}

.research-direction-media figcaption {
    margin-top: 0.85rem;
    color: var(--solaris-subtle);
    font-size: 0.78rem;
    line-height: 1.55;
}

.research-direction-media figcaption strong {
    color: var(--solaris-accent);
}

.overview-card {
    min-height: 230px;
    padding: 1.6rem;
    border: 1px solid var(--solaris-border);
    border-radius: 10px;
    background: var(--solaris-bg);
    box-shadow: 0 0 14px rgba(var(--solaris-accent-rgb), 0.08);
    transition: border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.overview-card:hover {
    border-color: var(--solaris-accent);
    background: rgba(var(--solaris-accent-rgb), 0.025);
    box-shadow: 0 0 24px rgba(var(--solaris-accent-rgb), 0.18);
}

.overview-card h2 {
    margin: 1rem 0 0.75rem;
    color: var(--solaris-text);
    font-size: 1.3rem;
    line-height: 1.3;
}

.overview-card p {
    margin: 0;
    color: var(--solaris-muted);
    line-height: 1.65;
}

.placeholder-label {
    display: inline-block;
    padding: 0.25rem 0.55rem;
    border: 1px solid rgba(var(--solaris-accent-rgb), 0.42);
    border-radius: 999px;
    color: var(--solaris-accent);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-shadow: 0 0 8px rgba(var(--solaris-accent-rgb), 0.24);
}

.placeholder-note {
    padding: 1rem 1.25rem;
    border-left: 3px solid var(--solaris-accent);
    background: var(--solaris-accent-soft);
    color: var(--solaris-muted);
    line-height: 1.6;
}

/* ACTIVITIES */
.activities-stack {
    display: grid;
    gap: 1.5rem;
    margin: 1rem 0 2.5rem;
}

.activity-section {
    overflow: hidden;
    border: 1px solid var(--solaris-border);
    border-radius: 12px;
    background: var(--solaris-bg);
    box-shadow: 0 0 16px rgba(var(--solaris-accent-rgb), 0.08);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.activity-section:hover,
.activity-section:focus-within {
    border-color: var(--solaris-border-strong);
    box-shadow: 0 0 26px rgba(var(--solaris-accent-rgb), 0.15);
}

.activity-section-header {
    padding: 1.6rem 1.75rem 1.4rem;
    border-bottom: 1px solid var(--solaris-border);
    background: linear-gradient(110deg, var(--solaris-accent-soft), transparent 65%);
}

.activity-kicker {
    color: var(--solaris-accent);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    text-shadow: 0 0 9px rgba(var(--solaris-accent-rgb), 0.28);
}

.activity-section-header h2 {
    margin: 0.35rem 0 0.45rem;
    color: var(--solaris-text);
    font-size: 1.5rem;
    line-height: 1.25;
}

.activity-section-header p,
.activity-entry p {
    margin: 0;
    color: var(--solaris-muted);
    line-height: 1.65;
}

.activity-section-content,
.activity-year-list {
    padding: 0 1.75rem;
}

.activity-section-content {
    padding-top: 1.5rem;
    padding-bottom: 1.6rem;
}

.activity-year-group {
    display: grid;
    grid-template-columns: 86px minmax(0, 1fr);
    gap: 1.25rem;
    padding: 1.5rem 0;
}

.activity-year-group + .activity-year-group {
    border-top: 1px solid var(--solaris-border);
}

.activity-year {
    padding-top: 0.1rem;
}

.activity-year span {
    color: var(--solaris-accent);
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-shadow: 0 0 10px rgba(var(--solaris-accent-rgb), 0.24);
}

.activity-entry {
    min-width: 0;
    padding-left: 1.15rem;
    border-left: 2px solid var(--solaris-border-strong);
}

.activity-entries {
    display: grid;
    min-width: 0;
}

.activity-entries .activity-entry + .activity-entry {
    margin-top: 1.35rem;
    padding-top: 1.35rem;
    border-top: 1px solid var(--solaris-border);
}

.activity-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem 0.75rem;
    align-items: center;
    margin-bottom: 0.35rem !important;
    color: var(--solaris-subtle) !important;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.activity-meta time {
    color: var(--solaris-accent);
}

.course-code {
    color: var(--solaris-accent) !important;
    font-size: 0.82rem;
    font-weight: 750;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.activity-meta span::before {
    margin-right: 0.75rem;
    color: var(--solaris-border-strong);
    content: "•";
}

.activity-entry h3 {
    margin: 0.3rem 0 0.4rem;
    color: var(--solaris-text);
    font-size: 1.08rem;
    line-height: 1.35;
}

.activity-entry h3 a {
    color: var(--solaris-text);
    text-decoration: none;
}

.activity-entry h3 a:hover {
    color: var(--solaris-accent);
}

.activity-entry .placeholder-label + h3 {
    margin-top: 0.65rem;
}

.activity-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.8rem;
}

.activity-links a {
    padding: 0.32rem 0.65rem;
    border: 1px solid var(--solaris-border-strong);
    border-radius: 999px;
    color: var(--solaris-accent);
    font-size: 0.76rem;
    font-weight: 700;
    text-decoration: none;
}

.activity-links a:hover {
    background: var(--solaris-accent-soft);
}

@media (max-width: 760px) {
    .research-vision,
    .research-directions {
        width: 100%;
        margin-left: 0;
        transform: none;
    }

    .research-direction {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .research-direction--reverse .research-direction-copy,
    .research-direction--reverse .research-direction-media {
        order: initial;
    }

    .research-direction-copy {
        order: 1 !important;
    }

    .research-direction-media {
        order: 2 !important;
    }

    .research-figure-frame {
        min-height: 260px;
    }
}

@media (max-width: 640px) {
    .overview-grid {
        grid-template-columns: 1fr;
    }

    .overview-card {
        min-height: auto;
        padding: 1.4rem;
    }

    .research-direction {
        padding: 1.15rem;
        border-radius: 14px;
    }

    .research-direction-copy h2 {
        padding-right: 1.6rem;
    }

    .research-direction-number {
        top: -0.7rem;
        font-size: 4.8rem;
    }

    .research-figure-frame {
        min-height: 220px;
    }

    .activity-section-header,
    .activity-section-content,
    .activity-year-list {
        padding-right: 1.25rem;
        padding-left: 1.25rem;
    }

    .activity-year-group {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .activity-meta span {
        flex-basis: 100%;
    }

    .activity-meta span::before {
        display: none;
    }
}