@import url('https://fonts.googleapis.com/css2?family=Sora:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');



:root {

    --primary: #5b48d4;

    --primary-dark: #2e1f8c;

    --primary-light: #efedff;

    --accent: #a893ff;

    --accent-soft: #d9d2ff;

    --text: #0d1a3d;

    --text-light: #2f3a5c;

    --muted: #6a7290;

    --border: #e0e2f0;

    --white: #ffffff;

    --background: #f6f7fe;

    --shadow-sm: 0 8px 24px rgba(54, 49, 125, 0.08);

    --shadow-md: 0 18px 44px rgba(64, 54, 160, 0.14);

    --shadow-lg: 0 26px 70px rgba(46, 31, 140, 0.22);

}



* {

    margin: 0;

    padding: 0;

    box-sizing: border-box;

}



html {

    scroll-behavior: smooth;

}



body {

    min-height: 100vh;

    overflow-x: hidden;

    color: var(--text);

    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;

    line-height: 1.65;

    background:

        radial-gradient(circle at 8% 8%, rgba(168, 147, 255, 0.26), transparent 28%),

        radial-gradient(circle at 92% 24%, rgba(144, 196, 255, 0.22), transparent 30%),

        radial-gradient(circle at 50% 100%, rgba(202, 188, 255, 0.18), transparent 32%),

        var(--background);

    -webkit-font-smoothing: antialiased;

}



body.spotlight-open {

    overflow: hidden;

}



img {

    display: block;

    max-width: 100%;

}



a {

    color: inherit;

    text-decoration: none;

}



button {

    font: inherit;

}



/* =========================================================

   SCROLL PROGRESS

========================================================= */

.scroll-progress {

    position: fixed;

    top: 0;

    left: 0;

    z-index: 10000;

    width: 100%;

    height: 3px;

    pointer-events: none;

}



.scroll-progress span {

    display: block;

    width: 100%;

    height: 100%;

    transform: scaleX(0);

    transform-origin: left center;

    background: linear-gradient(90deg, #5b48d4, #a893ff, #5b48d4);

}



/* =========================================================

   SITE HEADER

========================================================= */

.site-header {

    position: sticky;

    top: 12px;

    z-index: 999;

    width: min(1150px, calc(100% - 32px));

    margin: 12px auto 0;

}



.header-inner {

    position: relative;

    display: flex;

    align-items: center;

    gap: 22px;

    padding: 10px 18px;

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

    border: 1px solid rgba(220, 222, 240, 0.9);

    border-radius: 14px;

    box-shadow: 0 6px 22px rgba(56, 52, 125, 0.07);

    backdrop-filter: blur(15px);

    -webkit-backdrop-filter: blur(15px);

    transition: box-shadow 0.3s ease, background 0.3s ease;

}



.site-header.scrolled .header-inner {

    background: rgba(255,255,255,.985);

    box-shadow: 0 14px 34px rgba(54, 51, 110, 0.14);

}



.header-brand {

    display: flex;

    align-items: center;

    gap: 10px;

    flex-shrink: 0;

    color: var(--primary-dark);

    font-family: 'Sora', sans-serif;

    font-size: 13px;

    font-weight: 800;

    letter-spacing: .1em;

}



.header-brand img {

    width: 28px;

    height: 28px;

    padding: 3px;

    object-fit: contain;

    border-radius: 50%;

    background: rgba(118, 98, 233, .12);

}



.header-collapse {

    display: flex;

    align-items: center;

    gap: 22px;

    margin-left: auto;

}



.header-nav {

    display: flex;

    align-items: center;

    gap: 4px;

}



.header-nav a {

    padding: 7px 12px;

    border-radius: 8px;

    color: #3a4467;

    font-size: 11.5px;

    font-weight: 600;

    transition: color .2s ease, background .2s ease, transform .2s ease;

}



.header-nav a:hover,

.header-nav a.is-active {

    color: var(--primary);

    background: rgba(118, 98, 233, .09);

}



.header-nav a:hover {

    transform: translateY(-1px);

}



.header-actions {

    display: flex;

    align-items: center;

    gap: 10px;

    flex-shrink: 0;

}



.header-profile {

    width: 38px;

    height: 38px;

    display: grid;

    place-items: center;

    flex-shrink: 0;

    overflow: hidden;

    border: 1px solid #d9d2ff;

    border-radius: 50%;

    background: linear-gradient(135deg, #f0edff, #e0d9ff);

    transition: transform .2s ease, box-shadow .2s ease;

}



.header-profile:hover {

    transform: translateY(-2px) scale(1.05);

    box-shadow: 0 8px 18px rgba(98, 82, 220, .28);

}



.header-profile img {

    width: 100%;

    height: 100%;

    object-fit: cover;

}



.header-cta {

    display: inline-flex;

    align-items: center;

    padding: 10px 20px;

    border-radius: 999px;

    color: #fff;

    font-family: 'Sora', sans-serif;

    font-size: 11.5px;

    font-weight: 700;

    background: linear-gradient(135deg, #7765ed, #5945ce);

    box-shadow: 0 7px 17px rgba(98, 82, 220, .28);

    transition: transform .25s ease, box-shadow .25s ease;

}



.header-cta:hover {

    transform: translateY(-2px);

    box-shadow: 0 12px 24px rgba(98, 82, 220, .36);

}



.logout-btn {

    display: inline-flex;

    align-items: center;

    gap: 6px;

    padding: 8px 14px;

    border: 1px solid rgba(217, 74, 94, .22);

    border-radius: 999px;

    color: #b3324a;

    font-family: 'Sora', sans-serif;

    font-size: 11px;

    font-weight: 700;

    background: rgba(217, 74, 94, .08);

    transition: transform .2s ease, background .2s ease, color .2s ease;

}



.logout-btn svg {

    width: 14px;

    height: 14px;

}



.logout-btn:hover {

    color: #fff;

    background: linear-gradient(135deg, #e46476, #c93a4d);

    border-color: transparent;

    transform: translateY(-2px);

}



.nav-toggle {

    display: none;

}



.nav-toggle-label {

    display: none;

}



/* =========================================================

   PAGE

========================================================= */

.about-page {

    width: min(1120px, calc(100% - 32px));

    margin: 24px auto 90px;

}



/* =========================================================

   HERO

========================================================= */

.research-hero {

    position: relative;

    min-height: 390px;

    display: grid;

    place-items: center;

    overflow: hidden;

    isolation: isolate;

    margin-bottom: 24px;

    border: 1px solid rgba(214, 211, 242, .94);

    border-radius: 28px;

    background:

        radial-gradient(circle at 50% 42%, rgba(255,255,255,.98) 0 15%, rgba(255,255,255,.7) 35%, transparent 62%),

        linear-gradient(145deg, #f8f7ff 0%, #eeebff 55%, #eef5ff 100%);

    box-shadow: var(--shadow-md);

}



.research-hero::before,

.research-hero::after {

    content: "";

    position: absolute;

    width: 330px;

    height: 330px;

    border-radius: 50%;

    filter: blur(4px);

    opacity: .55;

    z-index: -1;

}



.research-hero::before {

    left: -130px;

    top: -130px;

    background: radial-gradient(circle, rgba(140, 112, 255, .42), transparent 68%);

}



.research-hero::after {

    right: -130px;

    bottom: -130px;

    background: radial-gradient(circle, rgba(113, 184, 255, .32), transparent 68%);

}



.research-hero h1 {

    position: relative;

    z-index: 4;

    padding: 18px 28px;

    text-align: center;

    color: transparent;

    font-family: 'Sora', sans-serif;

    font-size: clamp(34px, 7vw, 74px);

    line-height: 1;

    font-weight: 800;

    letter-spacing: -.055em;

    background: linear-gradient(135deg, #21166f 5%, #5b48d4 58%, #947ef1 100%);

    -webkit-background-clip: text;

    background-clip: text;

    filter: drop-shadow(0 8px 24px rgba(91,72,212,.12));

}



.hero-orbit {

    position: absolute;

    width: min(720px, 80vw);

    aspect-ratio: 1;

    border: 1px dashed rgba(91,72,212,.16);

    border-radius: 50%;

    animation: orbitSpin 34s linear infinite;

}



.hero-orbit::before,

.hero-orbit::after {

    content: "";

    position: absolute;

    inset: 12%;

    border: 1px dashed rgba(91,72,212,.12);

    border-radius: 50%;

}



.hero-orbit::after {

    inset: 28%;

}



.orbit-dot {

    --angle: calc(var(--i) * 40deg);

    position: absolute;

    left: 50%;

    top: 50%;

    width: 9px;

    height: 9px;

    margin: -4.5px;

    border-radius: 50%;

    background: linear-gradient(135deg, #8d77f1, #5b48d4);

    box-shadow: 0 0 0 6px rgba(91,72,212,.08);

    transform:

        rotate(var(--angle))

        translateX(min(36vw, 320px))

        rotate(calc(var(--angle) * -1));

}



@keyframes orbitSpin {

    to { transform: rotate(360deg); }

}



.hero-stack {

    position: absolute;

    inset: 0;

    pointer-events: none;

}



.stack-card {

    position: absolute;

    width: 98px;

    aspect-ratio: 4 / 5;

    overflow: hidden;

    border: 6px solid rgba(255,255,255,.92);

    border-radius: 20px;

    background: #ece9ff;

    box-shadow: 0 18px 35px rgba(64,54,160,.18);

    animation: stackFloat 5s ease-in-out infinite;

}



.stack-card img {

    width: 100%;

    height: 100%;

    object-fit: cover;

}



.stack-1 { left: 8%; top: 18%; transform: rotate(-10deg); }

.stack-2 { right: 10%; top: 15%; transform: rotate(9deg); animation-delay: .6s; }

.stack-3 { left: 18%; bottom: 9%; transform: rotate(7deg); animation-delay: 1.2s; }

.stack-4 { right: 20%; bottom: 8%; transform: rotate(-8deg); animation-delay: 1.8s; }

.stack-5 { left: 48%; top: 6%; width: 76px; transform: rotate(4deg); animation-delay: 2.4s; }



@keyframes stackFloat {

    0%,100% { translate: 0 0; }

    50% { translate: 0 -10px; }

}



.hero-random {

    position: absolute;

    right: 22px;

    bottom: 22px;

    z-index: 5;

    width: 48px;

    height: 48px;

    display: grid;

    place-items: center;

    border: 1px solid rgba(91,72,212,.18);

    border-radius: 50%;

    color: var(--primary);

    background: rgba(255,255,255,.88);

    box-shadow: 0 10px 24px rgba(66,55,160,.13);

    cursor: pointer;

    backdrop-filter: blur(12px);

    transition: transform .25s ease, box-shadow .25s ease, background .25s ease;

}



.hero-random:hover {

    transform: translateY(-4px) rotate(8deg);

    background: #fff;

    box-shadow: 0 15px 28px rgba(66,55,160,.2);

}



.hero-random svg {

    width: 20px;

    height: 20px;

}



/* =========================================================

   RESEARCHER BOARD

========================================================= */

.researcher-board {

    display: grid;

    grid-template-columns: repeat(2, minmax(0,1fr));

    gap: 20px;

    align-items: start;

}



.researcher-card {

    position: relative;

    overflow: hidden;

    padding: 22px;

    border: 1px solid rgba(223,221,242,.98);

    border-radius: 22px;

    background: rgba(255,255,255,.92);

    box-shadow: var(--shadow-sm);

    outline: none;

    isolation: isolate;

    cursor: pointer;

    transition:

        transform .35s cubic-bezier(.2,.7,.2,1),

        box-shadow .35s ease,

        border-color .35s ease;

}



.researcher-card:nth-child(3n + 2) {

    background: linear-gradient(160deg, rgba(255,255,255,.96), rgba(247,244,255,.96));

}



.researcher-card:nth-child(3n) {

    background: linear-gradient(160deg, rgba(255,255,255,.96), rgba(244,248,255,.96));

}



.researcher-card:hover,

.researcher-card:focus-visible,

.researcher-card.is-open {

    transform: translateY(-6px);

    border-color: rgba(168,147,255,.72);

    box-shadow: var(--shadow-md);

}



.card-glow {

    position: absolute;

    width: 180px;

    height: 180px;

    right: -90px;

    top: -90px;

    border-radius: 50%;

    background: radial-gradient(circle, rgba(168,147,255,.24), transparent 70%);

    pointer-events: none;

    z-index: -1;

    transition: transform .4s ease;

}



.researcher-card:hover .card-glow {

    transform: scale(1.35);

}



.researcher-head {

    display: grid;

    grid-template-columns: 82px minmax(0,1fr) 38px;

    gap: 16px;

    align-items: center;

}



.portrait-shell {

    position: relative;

    width: 82px;

    height: 82px;

    overflow: hidden;

    border: 4px solid rgba(255,255,255,.96);

    border-radius: 22px;

    background: linear-gradient(145deg,#eeeaff,#ddd5ff);

    box-shadow:

        0 0 0 1px rgba(168,147,255,.34),

        0 10px 22px rgba(87,70,180,.16);

    transform: rotate(-2deg);

    transition: transform .35s cubic-bezier(.2,.7,.2,1);

}



.researcher-card:nth-child(even) .portrait-shell {

    transform: rotate(2deg);

}



.researcher-card:hover .portrait-shell {

    transform: rotate(0) scale(1.05);

}



.researcher-image {

    position: relative;

    z-index: 2;

    width: 100%;

    height: 100%;

    object-fit: cover;

}



.portrait-fallback,

.spotlight-fallback {

    position: absolute;

    inset: 0;

    display: grid;

    place-items: center;

    color: var(--primary-dark);

    font-family: 'Sora', sans-serif;

    font-size: 28px;

    font-weight: 800;

    background:

        radial-gradient(circle at 30% 20%, rgba(255,255,255,.9), transparent 34%),

        linear-gradient(145deg,#eeeaff,#dcd5ff);

}



.researcher-image:not(.is-missing) + .portrait-fallback {

    display: none;

}



.researcher-title {

    min-width: 0;

}



.researcher-title h2 {

    color: var(--text);

    font-family: 'Sora', sans-serif;

    font-size: 15px;

    line-height: 1.3;

    font-weight: 800;

    letter-spacing: -.02em;

}



.researcher-role {

    margin-top: 5px;

    color: var(--primary);

    font-size: 11.5px;

    font-weight: 700;

}



.card-expand {

    width: 38px;

    height: 38px;

    display: grid;

    place-items: center;

    border: 1px solid rgba(91,72,212,.16);

    border-radius: 12px;

    color: var(--primary);

    background: rgba(91,72,212,.06);

    cursor: pointer;

    transition: transform .3s ease, background .25s ease;

}



.card-expand:hover {

    background: rgba(91,72,212,.12);

}



.card-expand svg {

    width: 17px;

    height: 17px;

    transition: transform .35s ease;

}



.researcher-card.is-open .card-expand svg {

    transform: rotate(45deg);

}



.reflection {

    position: relative;

    max-height: 150px;

    overflow: hidden;

    margin-top: 18px;

    color: var(--text-light);

    font-size: 12.2px;

    line-height: 1.85;

    transition: max-height .7s cubic-bezier(.2,.7,.2,1);

}



.reflection::after {

    content: "";

    position: absolute;

    left: 0;

    right: 0;

    bottom: 0;

    height: 72px;

    background: linear-gradient(to bottom, transparent, rgba(255,255,255,.98));

    pointer-events: none;

    transition: opacity .3s ease;

}



.researcher-card:nth-child(3n + 2) .reflection::after {

    background: linear-gradient(to bottom, transparent, rgba(247,244,255,.98));

}



.researcher-card:nth-child(3n) .reflection::after {

    background: linear-gradient(to bottom, transparent, rgba(244,248,255,.98));

}



.researcher-card.is-open .reflection {

    max-height: 1800px;

}



.researcher-card.is-open .reflection::after {

    opacity: 0;

}



.reflection p + p {

    margin-top: 14px;

}



.reflection strong {

    color: var(--primary-dark);

}



.card-pulse {

    display: flex;

    gap: 5px;

    margin-top: 16px;

}



.card-pulse span {

    width: 5px;

    height: 5px;

    border-radius: 50%;

    background: rgba(91,72,212,.2);

    transition: transform .3s ease, background .3s ease;

}



.researcher-card:hover .card-pulse span,

.researcher-card.is-open .card-pulse span {

    background: rgba(91,72,212,.72);

}



.researcher-card:hover .card-pulse span:nth-child(2),

.researcher-card.is-open .card-pulse span:nth-child(2) {

    transform: translateY(-3px);

}



.researcher-card:hover .card-pulse span:nth-child(3),

.researcher-card.is-open .card-pulse span:nth-child(3) {

    transform: translateY(-6px);

}



/* =========================================================

   SPOTLIGHT

========================================================= */

.spotlight {

    position: fixed;

    inset: 0;

    z-index: 5000;

    display: grid;

    grid-template-columns: 52px minmax(0,900px) 52px;

    gap: 16px;

    align-items: center;

    justify-content: center;

    padding: 40px;

    background: rgba(23,19,63,.64);

    backdrop-filter: blur(18px);

    -webkit-backdrop-filter: blur(18px);

    opacity: 0;

    visibility: hidden;

    pointer-events: none;

    transition: opacity .35s ease, visibility .35s ease;

}



.spotlight.is-visible {

    opacity: 1;

    visibility: visible;

    pointer-events: auto;

}



.spotlight-card {

    max-height: min(84vh, 840px);

    min-height: 0;

    display: grid;

    grid-template-columns: minmax(240px, .7fr) minmax(0,1.3fr);

    overflow: hidden;

    border: 1px solid rgba(255,255,255,.65);

    border-radius: 28px;

    background: rgba(255,255,255,.97);

    box-shadow: 0 30px 90px rgba(13,8,60,.35);

    transform: translateY(18px) scale(.97);

    transition: transform .4s cubic-bezier(.2,.7,.2,1);

}



.spotlight.is-visible .spotlight-card {

    transform: translateY(0) scale(1);

}



.spotlight-photo {

    position: relative;

    min-height: 360px;

    overflow: hidden;

    background: linear-gradient(145deg,#eeeaff,#d9d1ff);

}



.spotlight-photo::after {

    content: "";

    position: absolute;

    inset: auto 0 0;

    height: 34%;

    background: linear-gradient(to top, rgba(46,31,140,.18), transparent);

    pointer-events: none;

}



.spotlight-photo img {

    position: relative;

    z-index: 2;

    width: 100%;

    height: 100%;

    min-height: 360px;

    object-fit: cover;

}



.spotlight-photo img:not(.is-missing) + .spotlight-fallback {

    display: none;

}



.spotlight-copy {

    min-width: 0;

    min-height: 0;

    overflow-y: auto;

    overscroll-behavior: contain;

    -webkit-overflow-scrolling: touch;

    padding: 36px 38px 40px;

}



.spotlight-copy h2 {

    color: var(--text);

    font-family: 'Sora', sans-serif;

    font-size: clamp(20px,3vw,31px);

    line-height: 1.2;

    font-weight: 800;

    letter-spacing: -.035em;

}



.spotlight-role {

    margin-top: 7px;

    color: var(--primary);

    font-size: 12px;

    font-weight: 700;

}



.spotlight-role:empty {

    display: none;

}



.spotlight-reflection {

    margin-top: 24px;

    color: var(--text-light);

    font-size: 13px;

    line-height: 1.9;

}



.spotlight-reflection p + p {

    margin-top: 16px;

}



.spotlight-reflection strong {

    color: var(--primary-dark);

}



.spotlight-nav,

.spotlight-close {

    border: 1px solid rgba(255,255,255,.28);

    color: #fff;

    background: rgba(255,255,255,.12);

    cursor: pointer;

    backdrop-filter: blur(10px);

    transition: transform .25s ease, background .25s ease;

}



.spotlight-nav {

    width: 52px;

    height: 52px;

    display: grid;

    place-items: center;

    border-radius: 50%;

}



.spotlight-nav:hover,

.spotlight-close:hover {

    background: rgba(255,255,255,.22);

    transform: scale(1.08);

}



.spotlight-nav svg {

    width: 21px;

    height: 21px;

}



.spotlight-close {

    position: absolute;

    right: 28px;

    top: 28px;

    width: 44px;

    height: 44px;

    display: grid;

    place-items: center;

    border-radius: 14px;

}



.spotlight-close svg {

    width: 19px;

    height: 19px;

}



/* =========================================================

   REVEAL

========================================================= */

.researcher-card {

    opacity: 0;

    transform: translateY(24px);

}



.researcher-card.is-visible {

    opacity: 1;

    transform: translateY(0);

}



.researcher-card.is-visible:hover,

.researcher-card.is-visible:focus-visible,

.researcher-card.is-visible.is-open {

    transform: translateY(-6px);

}



/* =========================================================

   TABLET

========================================================= */

@media (max-width: 900px) {

    .researcher-board {

        grid-template-columns: 1fr;

    }



    .research-hero {

        min-height: 340px;

    }



    .stack-card {

        width: 82px;

    }



    .spotlight-card {

        grid-template-columns: 220px minmax(0,1fr);

    }



    .spotlight {

        padding: 26px;

    }

}



/* =========================================================

   MOBILE NAV + PAGE

========================================================= */

@media (max-width: 780px) {

    .site-header {

        top: 8px;

        width: calc(100% - 20px);

        margin-top: 8px;

    }



    .header-inner {

        flex-wrap: wrap;

        gap: 12px;

        padding: 10px 14px;

    }



    .header-brand {

        gap: 8px;

    }



    .header-brand img {

        width: 24px;

        height: 24px;

    }



    .header-brand span {

        font-size: 12px;

    }



    .nav-toggle {

        position: absolute;

        opacity: 0;

        pointer-events: none;

    }



    .nav-toggle-label {

        display: flex;

        width: 40px;

        height: 40px;

        margin-left: auto;

        align-items: center;

        justify-content: center;

        flex-direction: column;

        gap: 4px;

        border: 1px solid rgba(98,82,220,.15);

        border-radius: 11px;

        background: rgba(98,82,220,.08);

        cursor: pointer;

    }



    .nav-toggle-label span {

        display: block;

        width: 18px;

        height: 2px;

        border-radius: 999px;

        background: var(--primary);

        transform-origin: center;

        transition: transform .35s cubic-bezier(.2,.7,.2,1), opacity .25s ease;

    }



    .header-collapse {

        flex: 0 0 100%;

        width: 100%;

        flex-direction: column;

        align-items: stretch;

        gap: 6px;

        margin-left: 0;

        max-height: 0;

        overflow: hidden;

        opacity: 0;

        transform: translateY(-8px);

        pointer-events: none;

        transition:

            max-height .45s cubic-bezier(.2,.7,.2,1),

            opacity .25s ease,

            transform .3s ease,

            margin-top .35s ease,

            padding-top .35s ease;

    }



    .nav-toggle:checked ~ .header-collapse {

        max-height: 700px;

        opacity: 1;

        transform: translateY(0);

        margin-top: 10px;

        padding-top: 12px;

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

        pointer-events: auto;

    }



    .header-nav {

        width: 100%;

        flex-direction: column;

        align-items: stretch;

        gap: 6px;

    }



    .header-nav a {

        width: 100%;

        padding: 12px 14px;

        text-align: center;

        font-size: 12.5px;

        border: 1px solid rgba(98,82,220,.12);

        border-radius: 10px;

        background: rgba(98,82,220,.06);

    }



    .header-actions {

        width: 100%;

        justify-content: space-between;

        margin-top: 8px;

        padding-top: 12px;

        border-top: 1px dashed rgba(98,82,220,.22);

    }



    .header-profile {

        width: 46px;

        height: 46px;

    }



    .logout-btn {

        flex: 1;

        max-width: 220px;

        justify-content: center;

        padding: 13px 18px;

        border-radius: 12px;

        font-size: 12.5px;

    }



    .header-cta {

        width: 100%;

        justify-content: center;

        padding: 13px 18px;

        font-size: 12.5px;

    }



    .nav-toggle:checked ~ .nav-toggle-label span:nth-child(1) {

        transform: translateY(6px) rotate(45deg);

    }



    .nav-toggle:checked ~ .nav-toggle-label span:nth-child(2) {

        opacity: 0;

        transform: scaleX(0);

    }



    .nav-toggle:checked ~ .nav-toggle-label span:nth-child(3) {

        transform: translateY(-6px) rotate(-45deg);

    }



    .about-page {

        width: calc(100% - 20px);

        margin-top: 18px;

    }



    .research-hero {

        min-height: 310px;

        border-radius: 22px;

    }



    .research-hero h1 {

        font-size: clamp(32px, 11vw, 54px);

        max-width: 90%;

    }



    .stack-card {

        width: 70px;

        border-width: 4px;

        border-radius: 15px;

    }



    .stack-1 { left: 4%; top: 15%; }

    .stack-2 { right: 5%; top: 13%; }

    .stack-3 { left: 10%; bottom: 8%; }

    .stack-4 { right: 11%; bottom: 7%; }

    .stack-5 { display: none; }



    .hero-random {

        right: 14px;

        bottom: 14px;

        width: 43px;

        height: 43px;

    }



    .researcher-card {

        padding: 18px;

        border-radius: 19px;

    }



    .researcher-head {

        grid-template-columns: 68px minmax(0,1fr) 36px;

        gap: 13px;

    }



    .portrait-shell {

        width: 68px;

        height: 68px;

        border-radius: 18px;

    }



    .researcher-title h2 {

        font-size: 13.5px;

    }



    .researcher-role {

        font-size: 10.5px;

    }



    .reflection {

        font-size: 11.5px;

        line-height: 1.8;

        max-height: 135px;

    }



    .spotlight {

        grid-template-columns: 44px minmax(0,1fr) 44px;

        gap: 8px;

        padding: 18px 10px;

    }



    .spotlight-card {

        width: min(100%, 680px);

        height: min(84vh, 760px);

        max-height: 84vh;

        min-height: 0;

        grid-template-columns: 1fr;

        grid-template-rows: minmax(180px, 30vh) minmax(0, 1fr);

        border-radius: 22px;

        overflow: hidden;

    }



    .spotlight-photo {

        min-height: 0;

        height: 100%;

        max-height: none;

    }



    .spotlight-photo img {

        width: 100%;

        height: 100%;

        min-height: 0;

        max-height: none;

        object-fit: cover;

    }



    .spotlight-copy {

        min-height: 0;

        height: 100%;

        overflow-y: auto;

        overscroll-behavior-y: contain;

        -webkit-overflow-scrolling: touch;

        scrollbar-gutter: stable;

        padding: 22px 20px 34px;

    }



    .spotlight-reflection {

        padding-bottom: 8px;

    }



    .spotlight-copy h2 {

        font-size: 20px;

    }



    .spotlight-reflection {

        margin-top: 18px;

        font-size: 11.5px;

        line-height: 1.8;

    }



    .spotlight-nav {

        width: 42px;

        height: 42px;

    }



    .spotlight-close {

        right: 12px;

        top: 12px;

        width: 40px;

        height: 40px;

        z-index: 4;

    }

}



@media (max-width: 520px) {

    .research-hero {

        min-height: 270px;

    }



    .stack-card {

        width: 58px;

    }



    .researcher-head {

        grid-template-columns: 60px minmax(0,1fr) 34px;

        gap: 11px;

    }



    .portrait-shell {

        width: 60px;

        height: 60px;

        border-radius: 16px;

    }



    .researcher-title h2 {

        font-size: 12.5px;

    }



    .card-expand {

        width: 34px;

        height: 34px;

    }



    .spotlight {

        grid-template-columns: 1fr;

        padding: 14px;

    }



    .spotlight-nav {

        position: absolute;

        top: 50%;

        z-index: 6;

        transform: translateY(-50%);

    }



    .spotlight-nav:hover {

        transform: translateY(-50%) scale(1.06);

    }



    .spotlight-prev {

        left: 8px;

    }



    .spotlight-next {

        right: 8px;

    }



    .spotlight-card {

        width: 100%;

        height: 88vh;

        max-height: 88vh;

        grid-template-rows: minmax(150px, 25vh) minmax(0, 1fr);

    }



    .spotlight-copy {

        padding: 20px 18px 30px;

    }

}



@media (max-width: 420px) {

    .header-inner {

        padding: 9px 12px;

        gap: 10px;

    }



    .header-brand img {

        width: 22px;

        height: 22px;

    }



    .header-brand span {

        font-size: 11px;

        letter-spacing: .08em;

    }



    .nav-toggle-label {

        width: 36px;

        height: 36px;

        border-radius: 10px;

    }



    .nav-toggle-label span {

        width: 16px;

    }



    .research-hero h1 {

        font-size: 34px;

    }



    .researcher-card {

        padding: 16px;

    }



    .reflection {

        font-size: 11px;

    }

}



@media (prefers-reduced-motion: reduce) {

    *,

    *::before,

    *::after {

        animation-duration: .01ms !important;

        animation-iteration-count: 1 !important;

        transition-duration: .01ms !important;

        scroll-behavior: auto !important;

    }

}

/* ============================================================
   PERSONIUM HEADER — ENHANCED VERSION
   HEADER ONLY. About-page content is untouched.
   ============================================================ */

.site-header {
    position: sticky;
    top: 14px;
    z-index: 999;
    width: min(1160px, calc(100% - 32px));
    margin: 14px auto 0;
}

.header-inner {
    position: relative;
    min-height: 58px;
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 9px 12px 9px 16px;
    background: rgba(255, 255, 255, 0.97);
    border: 1px solid rgba(220, 222, 240, 0.92);
    border-radius: 17px;
    box-shadow: 0 10px 30px rgba(56, 52, 125, 0.10);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.site-header.scrolled .header-inner {
    background: rgba(255, 255, 255, 0.99);
    box-shadow: 0 16px 38px rgba(54, 51, 110, 0.15);
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 9px;
    flex: 0 0 auto;
    color: var(--primary-dark);
    font-family: 'Sora', sans-serif;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.09em;
}

.header-brand img {
    width: 30px;
    height: 30px;
    padding: 3px;
    object-fit: contain;
    border: 1px solid rgba(118, 98, 233, 0.14);
    border-radius: 10px;
    background: linear-gradient(145deg, #f1eeff, #e4ddff);
}

.header-collapse {
    min-width: 0;
    flex: 1 1 auto;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 14px;
    margin-left: auto;
}

.header-nav {
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 3px;
    padding: 3px;
    background: rgba(118, 98, 233, 0.045);
    border: 1px solid rgba(118, 98, 233, 0.08);
    border-radius: 11px;
}

.header-nav a {
    padding: 7px 10px;
    border-radius: 8px;
    color: #3a4467;
    font-size: 11px;
    font-weight: 650;
    white-space: nowrap;
    transition:
        color 0.2s ease,
        background 0.2s ease,
        transform 0.2s ease;
}

.header-nav a:hover,
.header-nav a.is-active,
.header-nav a:focus-visible {
    color: var(--primary-dark);
    background: #fff;
    outline: none;
}

.header-nav a:hover,
.header-nav a:focus-visible {
    transform: translateY(-1px);
}

.header-actions {
    flex: 0 0 auto;
    min-width: max-content;
    display: flex;
    align-items: center;
    gap: 8px;
}


/* Compact PC profile — prevents collision with Logout */
.header-profile {
    width: 42px;
    min-width: 42px;
    height: 42px;
    display: inline-grid;
    place-items: center;
    padding: 3px;
    flex: 0 0 42px;
    overflow: visible;
    color: var(--primary);
    border: 1px solid rgba(118, 98, 233, 0.18);
    border-radius: 12px;
    background: linear-gradient(145deg, #f7f5ff, #ece8ff);
    box-shadow: 0 5px 13px rgba(98, 82, 220, 0.10);
    transition:
        transform 0.22s ease,
        border-color 0.22s ease,
        box-shadow 0.22s ease;
}

.header-profile:hover,
.header-profile:focus-visible {
    transform: translateY(-2px);
    border-color: rgba(118, 98, 233, 0.34);
    box-shadow: 0 10px 22px rgba(98, 82, 220, 0.17);
    outline: none;
}

.header-profile-avatar {
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    overflow: hidden;
    border-radius: 9px;
    background: linear-gradient(145deg, #f1eeff, #ded7ff);
}

.header-profile-avatar > img {
    width: 100%;
    height: 100%;
    padding: 0;
    object-fit: cover;
    object-position: center;
    border-radius: 9px;
}

.header-default-profile {
    width: 100%;
    height: 100%;
    display: grid;
    place-items: center;
    color: var(--primary);
}

.header-default-profile svg {
    width: 20px;
    height: 20px;
}

.header-profile-copy {
    display: none;
}


/* Logout stays separate from profile */
.logout-btn {
    min-width: 82px;
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    flex: 0 0 auto;
    padding: 8px 12px;
    color: #b3324a;
    font-family: 'Sora', sans-serif;
    font-size: 10.5px;
    font-weight: 700;
    border: 1px solid rgba(217, 74, 94, 0.20);
    border-radius: 12px;
    background: rgba(217, 74, 94, 0.06);
    white-space: nowrap;
    transition:
        transform 0.2s ease,
        background 0.2s ease,
        color 0.2s ease,
        box-shadow 0.2s ease;
}

.logout-btn svg {
    width: 14px;
    height: 14px;
}

.logout-btn:hover,
.logout-btn:focus-visible {
    color: #fff;
    background: linear-gradient(135deg, #e46476, #c93a4d);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 8px 18px rgba(217, 74, 94, 0.25);
    outline: none;
}

.header-cta {
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 17px;
    color: #fff;
    background: linear-gradient(135deg, #7765ed, #5945ce);
    border-radius: 12px;
    font-family: 'Sora', sans-serif;
    font-size: 10.5px;
    font-weight: 700;
    white-space: nowrap;
    box-shadow: 0 7px 17px rgba(98, 82, 220, 0.25);
}

.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
}


/* ============================================================
   SMALLER PC / TABLET HEADER — 651px to 900px
   ============================================================ */
@media (min-width: 651px) and (max-width: 900px) {

    .site-header {
        width: calc(100% - 24px);
    }

    .header-inner {
        gap: 10px;
        padding-left: 12px;
        padding-right: 10px;
    }

    .header-brand {
        gap: 7px;
        font-size: 11px;
    }

    .header-brand img {
        width: 28px;
        height: 28px;
    }

    .nav-toggle-label {
        display: none;
    }

    .header-collapse {
        width: auto;
        max-height: none;
        margin: 0 0 0 auto;
        padding: 0;
        flex: 1 1 auto;
        display: flex;
        flex-direction: row;
        align-items: center;
        justify-content: flex-end;
        gap: 8px;
        overflow: visible;
        opacity: 1;
        transform: none;
        border-top: 0;
        pointer-events: auto;
        transition: none;
    }

    .header-nav {
        width: auto;
        flex-direction: row;
        gap: 1px;
        padding: 2px;
    }

    .header-nav a {
        width: auto;
        padding: 6px 7px;
        font-size: 9.4px;
        border: 0;
        background: transparent;
    }

    .header-actions {
        width: auto;
        margin: 0;
        padding: 0;
        flex-direction: row;
        gap: 6px;
        border-top: 0;
    }

    .header-profile {
        width: 38px;
        min-width: 38px;
        height: 38px;
        flex-basis: 38px;
    }

    .header-profile-avatar {
        width: 30px;
        height: 30px;
    }

    .logout-btn {
        min-width: 38px;
        min-height: 38px;
        width: 38px;
        padding: 0;
    }

    .logout-btn span {
        display: none;
    }

    .header-cta {
        width: auto;
        min-height: 38px;
        padding: 8px 12px;
        font-size: 9.5px;
    }
}


/* ============================================================
   MOBILE HEADER — ≤ 650px
   ============================================================ */
@media (max-width: 650px) {

    .site-header {
        top: 10px;
        width: calc(100% - 16px);
        margin: 8px auto 0;
    }

    .header-inner {
        min-height: 54px;
        padding: 8px 10px 8px 11px;
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        gap: 0;
        row-gap: 8px;
        border-radius: 16px;
        box-shadow: 0 10px 28px rgba(48, 40, 108, 0.12);
    }

    .header-brand {
        min-width: 0;
        margin-right: auto;
        gap: 8px;
        font-size: 12px;
        letter-spacing: 0.075em;
    }

    .header-brand img {
        width: 28px;
        height: 28px;
        padding: 2px;
        border-radius: 9px;
    }

    .nav-toggle {
        position: absolute;
        opacity: 0;
        pointer-events: none;
    }

    .nav-toggle-label {
        width: 36px;
        height: 36px;
        margin-left: 10px;
        display: flex;
        flex-shrink: 0;
        align-items: center;
        justify-content: center;
        flex-direction: column;
        gap: 4px;
        cursor: pointer;
        border: 1px solid rgba(98, 82, 220, 0.14);
        border-radius: 11px;
        background: rgba(98, 82, 220, 0.07);
        -webkit-tap-highlight-color: transparent;
        user-select: none;
    }

    .nav-toggle-label span {
        width: 16px;
        height: 2px;
        display: block;
        border-radius: 999px;
        background: var(--primary);
        transform-origin: center;
        transition:
            transform 0.3s cubic-bezier(0.2, 0.7, 0.2, 1),
            opacity 0.2s ease;
    }

    .header-collapse {
        flex: 0 0 100%;
        width: 100%;
        max-height: 0;
        margin: 0;
        padding: 0;
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
        overflow: hidden;
        opacity: 0;
        transform: translateY(-7px);
        pointer-events: none;
        border-top: 0;
        transition:
            max-height 0.42s cubic-bezier(0.2, 0.7, 0.2, 1),
            opacity 0.24s ease,
            transform 0.30s ease,
            padding-top 0.32s ease,
            margin-top 0.32s ease;
    }

    .nav-toggle:checked ~ .header-collapse {
        max-height: 590px;
        margin-top: 2px;
        padding-top: 10px;
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
        border-top: 1px solid rgba(98, 82, 220, 0.10);
    }

    .header-nav {
        width: 100%;
        padding: 0;
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 7px;
        border: 0;
        background: transparent;
    }

    .header-nav a {
        width: 100%;
        min-height: 42px;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 9px 10px;
        text-align: center;
        font-size: 10.5px;
        font-weight: 700;
        border: 1px solid rgba(98, 82, 220, 0.10);
        border-radius: 11px;
        background: linear-gradient(
            135deg,
            rgba(255,255,255,.95),
            rgba(245,243,255,.90)
        );
    }

    .header-nav a.is-active {
        color: var(--primary-dark);
        border-color: rgba(98, 82, 220, 0.20);
        background: rgba(98, 82, 220, 0.10);
    }

    .header-actions {
        width: 100%;
        min-width: 0;
        margin-top: 1px;
        padding-top: 9px;
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: stretch;
        gap: 7px;
        border-top: 1px dashed rgba(98, 82, 220, 0.17);
    }

    .header-profile {
        width: 100%;
        min-width: 0;
        height: 50px;
        padding: 5px 9px 5px 6px;
        display: flex;
        align-items: center;
        justify-content: flex-start;
        gap: 9px;
        flex: none;
        border-radius: 12px;
    }

    .header-profile-avatar {
        width: 38px;
        height: 38px;
        flex: 0 0 38px;
        border-radius: 10px;
    }

    .header-profile-avatar > img {
        border-radius: 10px;
    }

    .header-profile-copy {
        min-width: 0;
        display: flex;
        flex: 1;
        flex-direction: column;
        align-items: flex-start;
        gap: 1px;
        line-height: 1.1;
    }

    .header-profile-copy > span {
        color: var(--muted);
        font-size: 8.5px;
        font-weight: 700;
    }

    .header-profile-copy > strong {
        color: var(--primary-dark);
        font-family: 'Sora', sans-serif;
        font-size: 10.5px;
        font-weight: 800;
        letter-spacing: 0.06em;
    }

    .logout-btn {
        width: 50px;
        min-width: 50px;
        min-height: 50px;
        padding: 0;
        border-radius: 12px;
    }

    .logout-btn svg {
        width: 17px;
        height: 17px;
    }

    .logout-btn span {
        display: none;
    }

    .header-cta {
        grid-column: 1 / -1;
        width: 100%;
        min-height: 46px;
        justify-content: center;
        border-radius: 12px;
        font-size: 11px;
    }

    .nav-toggle:checked ~ .nav-toggle-label span:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
    }

    .nav-toggle:checked ~ .nav-toggle-label span:nth-child(2) {
        opacity: 0;
        transform: scaleX(0);
    }

    .nav-toggle:checked ~ .nav-toggle-label span:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
    }
}


/* ============================================================
   SMALL MOBILE HEADER — ≤ 420px
   ============================================================ */
@media (max-width: 420px) {

    .site-header {
        top: 8px;
        width: calc(100% - 14px);
        margin-top: 7px;
    }

    .header-inner {
        min-height: 50px;
        padding: 7px 8px 7px 9px;
        border-radius: 14px;
    }

    .header-brand {
        gap: 7px;
        font-size: 11px;
        letter-spacing: 0.06em;
    }

    .header-brand img {
        width: 26px;
        height: 26px;
    }

    .nav-toggle-label {
        width: 32px;
        height: 32px;
        margin-left: 7px;
        border-radius: 10px;
    }

    .nav-toggle-label span {
        width: 14px;
    }

    .nav-toggle:checked ~ .header-collapse {
        max-height: 560px;
        padding-top: 8px;
    }

    .header-nav {
        gap: 6px;
    }

    .header-nav a {
        min-height: 39px;
        padding: 8px 7px;
        font-size: 9.5px;
        border-radius: 10px;
    }

    .header-actions {
        gap: 6px;
        padding-top: 8px;
    }

    .header-profile {
        height: 46px;
        padding: 4px 7px 4px 5px;
        gap: 7px;
        border-radius: 11px;
    }

    .header-profile-avatar {
        width: 36px;
        height: 36px;
        flex-basis: 36px;
    }

    .header-profile-copy > span {
        font-size: 8px;
    }

    .header-profile-copy > strong {
        font-size: 10px;
    }

    .logout-btn {
        width: 46px;
        min-width: 46px;
        min-height: 46px;
        border-radius: 11px;
    }

    .header-cta {
        min-height: 43px;
        padding: 9px 13px;
        font-size: 10px;
        border-radius: 11px;
    }
}