/* =========================================================
   DESIGN VARIABLES
   ========================================================= */

:root {

    --navy: #15324d;

    --navy-dark: #0d2236;

    --blue: #3478f6;

    --blue-light: #edf4ff;

    --text: #293b4f;

    --muted: #69798a;

    --background: #f6f8fb;

    --white: #ffffff;

    --border: #e5ebf1;

}


/* =========================================================
   GLOBAL
   ========================================================= */

* {
    box-sizing: border-box;
}


html {
    scroll-behavior: smooth;
}


body {

    margin: 0;

    padding-top: 82px;

    font-family: "DM Sans", sans-serif;

    color: var(--text);

    background: var(--background);

    line-height: 1.7;

}


a {
    text-decoration: none;
}



/* =========================================================
   NAVIGATION
   ========================================================= */

.navbar {

    min-height: 82px;

    background: rgba(255, 255, 255, 0.96);

    backdrop-filter: blur(12px);

    border-bottom: 1px solid var(--border);

}


.navbar-brand {

    color: var(--navy) !important;

    font-weight: 700;

    font-size: 1.35rem;

}


.nav-link {

    color: #536477 !important;

    font-weight: 500;

    margin-left: 12px;

}


.nav-link:hover {

    color: var(--blue) !important;

}



/* =========================================================
   HERO
   ========================================================= */

.hero-section {

    padding: 105px 0 95px;

    background:

        radial-gradient(
            circle at 88% 10%,
            rgba(52,120,246,0.16),
            transparent 33%
        ),

        linear-gradient(
            180deg,
            #ffffff,
            #f6f8fb
        );

}


.hero-kicker {

    color: var(--blue);

    font-size: 0.82rem;

    font-weight: 700;

    letter-spacing: 0.11em;

    text-transform: uppercase;

}


.hero-title {

    margin-top: 15px;

    color: var(--navy);

    font-size: clamp(3.3rem, 8vw, 6rem);

    font-weight: 700;

    letter-spacing: -0.06em;

    line-height: 0.95;

}


.hero-subtitle {

    max-width: 820px;

    margin-top: 30px;

    color: #3f5872;

    font-size: 1.65rem;

    line-height: 1.4;

}


.hero-text {

    max-width: 800px;

    margin-top: 25px;

    color: var(--muted);

    font-size: 1.08rem;

}



/* =========================================================
   GENERAL SECTIONS
   ========================================================= */

.section-block {

    padding: 80px 0;

}


.section-soft {

    background: var(--white);

}


.section-heading {

    max-width: 700px;

    margin-bottom: 40px;

}


.section-eyebrow {

    display: block;

    margin-bottom: 8px;

    color: var(--blue);

    font-size: 0.78rem;

    font-weight: 700;

    letter-spacing: 0.12em;

    text-transform: uppercase;

}


.section-heading h2 {

    color: var(--navy);

    font-size: 2.2rem;

    font-weight: 700;

    letter-spacing: -0.03em;

}


.section-heading p {

    color: var(--muted);

}



/* =========================================================
   RESEARCH INTEREST CARDS
   ========================================================= */

.interest-card {

    height: 100%;

    padding: 23px;

    display: flex;

    align-items: center;

    gap: 14px;

    background: var(--white);

    border: 1px solid var(--border);

    border-radius: 18px;

    color: #344b62;

    font-weight: 600;

    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease,
        border-color 0.2s ease;

}


.interest-card:hover {

    transform: translateY(-5px);

    border-color: #b9d0f5;

    box-shadow:
        0 14px 30px rgba(32, 61, 94, 0.08);

}


.interest-icon {

    width: 44px;

    height: 44px;

    flex: 0 0 44px;

    display: flex;

    align-items: center;

    justify-content: center;

    border-radius: 12px;

    background: var(--blue-light);

    color: var(--blue);

    font-size: 1.2rem;

}



/* =========================================================
   EDUCATION
   ========================================================= */

.education-timeline {

    max-width: 900px;

}


.education-entry {

    position: relative;

    display: grid;

    grid-template-columns: 22px 1fr;

    gap: 25px;

    padding-bottom: 50px;

}


.education-entry::before {

    content: "";

    position: absolute;

    left: 8px;

    top: 22px;

    bottom: 0;

    width: 2px;

    background: #dce5ef;

}


.education-entry:last-child::before {

    display: none;

}


.education-marker {

    width: 18px;

    height: 18px;

    margin-top: 5px;

    background: var(--blue);

    border-radius: 50%;

    box-shadow:
        0 0 0 6px var(--blue-light);

    z-index: 1;

}


.education-year {

    color: var(--blue);

    font-weight: 700;

}


.education-entry h3 {

    margin-top: 6px;

    color: var(--navy);

    font-size: 1.3rem;

    font-weight: 700;

}


.education-thesis {

    max-width: 750px;

    color: var(--muted);

}



/* =========================================================
   CONTACT PANEL
   ========================================================= */

.contact-panel {

    padding: 42px;

    display: flex;

    align-items: center;

    justify-content: space-between;

    gap: 30px;

    background:
        linear-gradient(
            135deg,
            #15324d,
            #204f7c
        );

    color: white;

    border-radius: 25px;

    box-shadow:
        0 20px 45px rgba(20, 49, 76, 0.16);

}


.contact-panel h2 {

    color: white;

}


.contact-panel .section-eyebrow {

    color: #8fbbff;

}



/* =========================================================
   INNER PAGE HERO
   ========================================================= */

.page-hero {

    padding: 85px 0 60px;

    background: white;

    border-bottom: 1px solid var(--border);

}


.page-hero h1 {

    color: var(--navy);

    font-size: 3.7rem;

    font-weight: 700;

    letter-spacing: -0.05em;

}


.page-hero p {

    max-width: 750px;

    color: var(--muted);

    font-size: 1.15rem;

}



/* =========================================================
   RESEARCH PAGE
   ========================================================= */

.research-card {

    height: 100%;

    padding: 30px;

    background: white;

    border: 1px solid var(--border);

    border-radius: 20px;

    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease;

}


.research-card:hover {

    transform: translateY(-5px);

    box-shadow:
        0 15px 32px rgba(24, 52, 82, 0.09);

}


.research-card-icon {

    width: 50px;

    height: 50px;

    display: flex;

    align-items: center;

    justify-content: center;

    margin-bottom: 20px;

    background: var(--blue-light);

    color: var(--blue);

    border-radius: 14px;

    font-size: 1.3rem;

}


.research-card h3 {

    color: var(--navy);

    font-size: 1.25rem;

    font-weight: 700;

}


.research-card p {

    margin-bottom: 0;

    color: var(--muted);

}


.method-card {

    height: 100%;

    padding: 28px;

    background: #f5f8fc;

    border-radius: 18px;

}


.method-number {

    color: var(--blue);

    font-size: 0.85rem;

    font-weight: 700;

    letter-spacing: 0.1em;

}


.method-card h3 {

    margin-top: 16px;

    color: var(--navy);

    font-size: 1.2rem;

    font-weight: 700;

}


.method-card p {

    color: var(--muted);

}



/* =========================================================
   PUBLICATIONS
   ========================================================= */

.publication-note {

    padding: 16px 20px;

    background: var(--blue-light);

    color: #3f5e7d;

    border-radius: 12px;

}


.publication-card {

    display: grid;

    grid-template-columns: 90px 1fr;

    gap: 25px;

    padding: 32px 0;

    border-bottom: 1px solid var(--border);

}


.publication-year {

    color: var(--blue);

    font-weight: 700;

}


.publication-body h3 {

    color: var(--navy);

    font-size: 1.25rem;

    line-height: 1.5;

}


.publication-venue {

    color: var(--muted);

    font-style: italic;

}


.publication-tags {

    display: flex;

    flex-wrap: wrap;

    gap: 8px;

}


.publication-tags span {

    padding: 5px 12px;

    background: #eef3f8;

    border-radius: 50px;

    color: #52677b;

    font-size: 0.82rem;

}


/* =========================================================
   PUBLICATION METRICS
   ========================================================= */

.metric-card {

    height: 100%;

    padding: 28px;

    text-align: center;

    background: white;

    border: 1px solid var(--border);

    border-radius: 18px;

}


.metric-value {

    color: var(--navy);

    font-size: 2.3rem;

    font-weight: 700;

}


.metric-label {

    margin-top: 5px;

    color: var(--muted);

    font-size: 0.9rem;

}


.publication-authors {

    margin-bottom: 5px;

    color: #4d6073;

}


.publication-meta {

    display: flex;

    flex-wrap: wrap;

    align-items: center;

    gap: 10px;

    margin-top: 14px;

}


.citation-badge {

    padding: 5px 12px;

    background: #eef3f8;

    border-radius: 50px;

    color: #53697d;

    font-size: 0.82rem;

}


/* =========================================================
   CONTACT CARDS
   ========================================================= */

.contact-card {

    height: 100%;

    padding: 32px;

    background: white;

    border: 1px solid var(--border);

    border-radius: 20px;

}


.contact-icon {

    width: 50px;

    height: 50px;

    display: flex;

    justify-content: center;

    align-items: center;

    margin-bottom: 20px;

    background: var(--blue-light);

    border-radius: 14px;

    color: var(--blue);

    font-size: 1.3rem;

}


.contact-card h3 {

    color: var(--navy);

    font-weight: 700;

}



/* =========================================================
   LEARNING PAGE
   ========================================================= */

.learn-hero {

    padding: 95px 0 70px;

    background:

        radial-gradient(
            circle at center top,
            rgba(52,120,246,0.13),
            transparent 40%
        ),

        white;

}


.learn-icon {

    width: 75px;

    height: 75px;

    margin: 0 auto 20px;

    display: flex;

    align-items: center;

    justify-content: center;

    border-radius: 22px;

    background: var(--blue-light);

    color: var(--blue);

    font-size: 2rem;

}


.learn-hero h1 {

    color: var(--navy);

    font-size: 3.7rem;

    font-weight: 700;

    letter-spacing: -0.05em;

}


.learn-hero p {

    max-width: 700px;

    margin: 20px auto 0;

    color: var(--muted);

    font-size: 1.15rem;

}


.game-card {

    height: 100%;

    padding: 30px;

    background: white;

    border: 1px solid var(--border);

    border-radius: 20px;

    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease;

}


.game-card:hover {

    transform: translateY(-5px);

    box-shadow:
        0 15px 35px rgba(22, 51, 82, 0.09);

}


.game-icon {

    width: 54px;

    height: 54px;

    display: flex;

    align-items: center;

    justify-content: center;

    margin-bottom: 20px;

    background: var(--blue-light);

    border-radius: 15px;

    color: var(--blue);

    font-size: 1.5rem;

}


.game-card h3 {

    color: var(--navy);

    font-size: 1.25rem;

    font-weight: 700;

}


.game-card p {

    color: var(--muted);

}


.coming-soon {

    display: inline-block;

    padding: 5px 12px;

    background: #eef3f8;

    border-radius: 50px;

    color: #66788a;

    font-size: 0.8rem;

    font-weight: 600;

}



/* =========================================================
   FOOTER
   ========================================================= */

.site-footer {

    padding: 35px 0;

    background: var(--navy-dark);

    color: #c5d1dd;

}


.footer-name {

    color: white;

    font-weight: 700;

}


.footer-description {

    color: #91a4b6;

    font-size: 0.88rem;

}


.footer-copy {

    color: #8296aa;

    font-size: 0.88rem;

}



/* =========================================================
   MOBILE
   ========================================================= */

@media (max-width: 768px) {

    body {
        padding-top: 70px;
    }


    .hero-section {
        padding: 70px 0;
    }


    .hero-subtitle {
        font-size: 1.35rem;
    }


    .section-block {
        padding: 60px 0;
    }


    .page-hero h1,
    .learn-hero h1 {
        font-size: 2.7rem;
    }


    .contact-panel {

        padding: 30px;

        flex-direction: column;

        align-items: flex-start;

    }


    .publication-card {

        grid-template-columns: 1fr;

        gap: 8px;

    }

}