/* --- GOLD & BLACK THEME VARIABLES --- */
        :root {
            --bg-dark: #050505;
            --bg-card: #121212;
            --primary: #fbbf24;       /* Amber/Gold */
            --secondary: #b45309;     /* Copper */
            --highlight: #ffffff;     /* White */
            --text-main: #f5f5f5;
            --text-muted: #a3a3a3;
            --glass: rgba(5, 5, 5, 0.6);
            --border: rgba(251, 191, 36, 0.15);
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.8);
            --shadow-soft: 0 10px 24px -16px rgba(0, 0, 0, 0.75);
            --glow: radial-gradient(circle, rgba(251, 191, 36, 0.15) 0%, rgba(0,0,0,0) 70%);
            --grid-color: rgba(251, 191, 36, 0.03);
        }

        [data-theme="light"] {
            --bg-dark: #fafafa;
            --bg-card: #ffffff;
            --text-main: #171717;
            --text-muted: #525252;
            --highlight: #000000;
            --primary: #d97706;
            --secondary: #92400e;
            --glass: rgba(255, 255, 255, 0.7);
            --border: rgba(217, 119, 6, 0.15);
            --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.1);
            --grid-color: rgba(0, 0, 0, 0.03);
            --glow: radial-gradient(circle, rgba(217, 119, 6, 0.08) 0%, rgba(0,0,0,0) 60%);
        }

        /* --- RESET & BASE --- */
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'Inter', sans-serif; background-color: var(--bg-dark); color: var(--text-main); line-height: 1.65; overflow-x: hidden; transition: background-color 0.3s ease, color 0.3s ease; }
        a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
        ul { list-style: none; }

        /* --- NAVIGATION --- */
        header { 
            position: sticky; top: 0; z-index: 1000; 
            background: var(--glass);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid rgba(251, 191, 36, 0.1);
            transition: border-color 0.3s ease;
        }
        nav { max-width: 1200px; margin: 0 auto; padding: 1rem 2rem; display: flex; justify-content: space-between; align-items: center; position: relative; }

        /* LOGO */
        .logo-container { position: relative; display: flex; align-items: center; justify-content: center; padding: 5px; cursor: pointer; transition: transform 0.2s; }
        .logo-container:hover { transform: scale(1.05); }
        .logo-text { font-size: 2rem; font-weight: 800; color: var(--highlight); z-index: 10; position: relative; letter-spacing: 0.05em; text-shadow: 0 0 20px rgba(251, 191, 36, 0.4); transition: color 0.3s; }
        [data-theme="light"] .logo-text { text-shadow: none; }
        .logo-meaning {
            position: absolute;
            left: 50%;
            top: calc(100% + 9px);
            transform: translateX(-50%) translateY(4px);
            font-size: 0.67rem;
            letter-spacing: 0.05em;
            color: var(--text-muted);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 0.24rem 0.62rem;
            background: var(--bg-card);
            white-space: nowrap;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.18s ease, transform 0.18s ease;
            z-index: 30;
        }
        .logo-container:hover .logo-meaning,
        .logo-container:focus-within .logo-meaning {
            opacity: 1;
            transform: translateX(-50%) translateY(0);
        }

        /* LOGO PLUS STYLE (STATIC) */
        .logo-plus {
            color: var(--primary);
            font-weight: 900;
            margin-left: 2px;
            display: inline-block;
            position: relative;
            text-shadow: 0 0 10px rgba(251, 191, 36, 0.5);
        }
        .logo-plus::before {
            content: "";
            position: absolute;
            width: 190px;
            height: 20px;
            left: -178px;
            top: 50%;
            transform: translateY(-50%);
            background:
                linear-gradient(90deg, rgba(251, 191, 36, 0) 0%, rgba(251, 191, 36, 0.07) 24%, rgba(251, 191, 36, 0.42) 74%, rgba(255, 248, 234, 0.82) 100%),
                linear-gradient(90deg, rgba(255, 255, 255, 0) 0%, rgba(255, 252, 244, 0.36) 100%),
                repeating-linear-gradient(90deg, rgba(251, 191, 36, 0) 0 10px, rgba(251, 191, 36, 0.08) 10px 11px);
            background-size: 100% 100%, 100% 36%, 100% 100%;
            background-position: 0 0, 0 50%, 0 0;
            background-repeat: no-repeat;
            filter: blur(1.45px);
            opacity: 0.82;
            animation: beam-flow 3.2s ease-in-out infinite;
            pointer-events: none;
        }
        .logo-plus::after {
            content: "";
            position: absolute;
            width: 9px;
            height: 9px;
            border-radius: 50%;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            background: rgba(255, 250, 234, 0.95);
            box-shadow:
                0 0 0 7px rgba(251, 191, 36, 0.2),
                0 0 0 14px rgba(251, 191, 36, 0.11),
                0 0 0 20px rgba(251, 191, 36, 0.05),
                0 0 20px rgba(251, 191, 36, 0.74);
            animation: core-pulse 3.2s ease-in-out infinite;
            pointer-events: none;
        }
        
        .logo-scatter {
            position: absolute;
            right: -48px;
            top: 50%;
            transform: translateY(-50%);
            width: 112px;
            height: 72px;
            z-index: 5;
            opacity: 0.62;
            -webkit-mask-image: radial-gradient(ellipse at 15% 50%, black 18%, transparent 78%);
            mask-image: radial-gradient(ellipse at 15% 50%, black 18%, transparent 78%);
            pointer-events: none;
        }
        .logo-scatter::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(circle at 12% 50%, rgba(255, 244, 217, 0.9) 0.8px, transparent 3px),
                radial-gradient(circle at 28% 32%, rgba(251, 191, 36, 0.55) 1.1px, transparent 2.6px),
                radial-gradient(circle at 38% 62%, rgba(251, 191, 36, 0.45) 1px, transparent 2.4px),
                radial-gradient(circle at 52% 40%, rgba(251, 191, 36, 0.4) 1px, transparent 2.4px),
                radial-gradient(circle at 66% 22%, rgba(180, 83, 9, 0.36) 1px, transparent 2.2px),
                radial-gradient(circle at 74% 58%, rgba(251, 191, 36, 0.32) 1px, transparent 2.2px),
                radial-gradient(circle at 86% 44%, rgba(251, 191, 36, 0.24) 1px, transparent 2px);
            animation: plume-drift 5.6s ease-in-out infinite;
        }
        .logo-scatter::after {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(circle at 20% 48%, rgba(255, 250, 236, 0.7) 0.8px, transparent 2.6px),
                radial-gradient(circle at 44% 50%, rgba(251, 191, 36, 0.28) 0.9px, transparent 2.3px),
                radial-gradient(circle at 60% 36%, rgba(251, 191, 36, 0.22) 0.9px, transparent 2px),
                radial-gradient(circle at 70% 68%, rgba(180, 83, 9, 0.22) 0.9px, transparent 2px),
                radial-gradient(circle at 92% 52%, rgba(251, 191, 36, 0.2) 0.9px, transparent 2px);
            filter: blur(0.6px);
            opacity: 0.76;
            mix-blend-mode: screen;
            animation: plume-drift 7.4s ease-in-out infinite reverse;
        }
        [data-theme="light"] .logo-plus {
            text-shadow: 0 0 6px rgba(217, 119, 6, 0.3);
        }
        [data-theme="light"] .logo-plus::before {
            background:
                linear-gradient(90deg, rgba(217, 119, 6, 0) 0%, rgba(217, 119, 6, 0.06) 24%, rgba(217, 119, 6, 0.28) 72%, rgba(255, 255, 255, 0.72) 100%),
                linear-gradient(90deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.38) 100%),
                repeating-linear-gradient(90deg, rgba(217, 119, 6, 0) 0 10px, rgba(217, 119, 6, 0.08) 10px 11px);
            background-size: 100% 100%, 100% 36%, 100% 100%;
            background-position: 0 0, 0 50%, 0 0;
            background-repeat: no-repeat;
            opacity: 0.68;
        }
        [data-theme="light"] .logo-plus::after {
            background: rgba(255, 255, 255, 0.92);
            box-shadow:
                0 0 0 6px rgba(217, 119, 6, 0.16),
                0 0 0 12px rgba(217, 119, 6, 0.08),
                0 0 12px rgba(217, 119, 6, 0.32);
        }
        [data-theme="light"] .logo-scatter { opacity: 0.46; }
        @keyframes beam-flow {
            0%, 100% { opacity: 0.75; transform: translateY(-50%) scaleX(0.93); background-position: 0 0, 0 50%, 0 0; }
            50% { opacity: 1; transform: translateY(-50%) scaleX(1.02); background-position: 0 0, 0 50%, 20px 0; }
        }
        @keyframes core-pulse {
            0%, 100% { transform: translate(-50%, -50%) scale(0.94); }
            50% { transform: translate(-50%, -50%) scale(1.08); }
        }
        @keyframes plume-drift {
            0%, 100% { transform: translateX(0); opacity: 0.86; }
            50% { transform: translateX(4px); opacity: 1; }
        }

        .nav-links { display: flex; gap: 2rem; align-items: center; }
        .nav-btn {
            background: transparent; border: none; color: var(--text-muted); font-family: 'Inter', sans-serif; font-weight: 500; font-size: 0.95rem;
            cursor: pointer; transition: color 0.3s; position: relative; text-transform: uppercase; letter-spacing: 0.05em;
        }
        .nav-btn:hover, .nav-btn.active { color: var(--primary); }
        .nav-btn.active::after { content: ''; position: absolute; bottom: -5px; left: 0; width: 100%; height: 1px; background: var(--primary); box-shadow: 0 0 8px var(--primary); }
        
        .theme-toggle {
            background: transparent; border: 1px solid var(--border); color: var(--text-main);
            width: 36px; height: 36px; border-radius: 50%; cursor: pointer;
            display: flex; align-items: center; justify-content: center; font-size: 1.1rem;
            transition: all 0.3s; margin-left: 1rem;
        }
        .theme-toggle:hover { background: var(--border); color: var(--primary); }
        .hamburger { display: none; cursor: pointer; font-size: 1.8rem; color: var(--primary); background: none; border: none; margin-left: 1rem; }

        /* --- HERO --- */
        .hero { 
            position: relative; padding: 10rem 2rem; text-align: center; overflow: hidden; 
            border-bottom: 1px solid var(--border);
            background-color: var(--bg-dark);
            background-image: 
                linear-gradient(var(--grid-color) 1px, transparent 1px),
                linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
            background-size: 50px 50px;
            transition: background-color 0.3s, border-color 0.3s;
        }
        .hero-content { position: relative; z-index: 10; }
        
        .nano-scene { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; overflow: hidden; }
        .nano-scene::before {
            content: "";
            position: absolute;
            inset: 0;
            background:
                radial-gradient(circle at 18% 30%, rgba(251, 191, 36, 0.12), transparent 35%),
                radial-gradient(circle at 76% 68%, rgba(180, 83, 9, 0.14), transparent 40%);
            mix-blend-mode: screen;
        }
        .nano-hex {
            position: absolute; width: 60px; height: 60px; background: var(--grid-color);
            clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
            border: 1px solid var(--border); animation: float 10s ease-in-out infinite;
        }
        .hex-1 { top: 15%; left: 10%; animation-delay: 0s; transform: rotate(15deg); }
        .hex-2 { bottom: 20%; right: 15%; width: 100px; height: 100px; animation-delay: -2s; transform: rotate(-10deg); opacity: 0.5; }
        .hex-3 { top: 20%; right: 25%; width: 40px; height: 40px; animation-delay: -5s; }
        .circuit-line {
            position: absolute; background: linear-gradient(90deg, transparent, var(--primary), transparent);
            height: 1px; width: 150px; opacity: 0; animation: electron-flow 4s linear infinite;
        }
        .line-1 { top: 30%; left: 0; animation-delay: 1s; }
        .line-2 { bottom: 40%; right: 0; animation-delay: 3s; transform: rotate(180deg); }
        .line-3 { top: 60%; left: 20%; width: 200px; transform: rotate(45deg); animation-delay: 0s; }
        .emitter { position: absolute; width: 4px; height: 4px; background: var(--highlight); border-radius: 50%; box-shadow: 0 0 10px var(--primary); }
        .emitter::after {
            content: ''; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
            width: 20px; height: 20px; border: 1px solid var(--primary); border-radius: 50%;
            animation: ripple 2s ease-out infinite; opacity: 0;
        }
        .emit-1 { top: 30%; left: 25%; animation-delay: 0.5s; }
        .emit-2 { bottom: 25%; right: 30%; animation-delay: 1.5s; }
        .photon-wave {
            position: absolute;
            width: 560px;
            height: 560px;
            border: 1px solid rgba(251, 191, 36, 0.16);
            border-radius: 50%;
            opacity: 0.25;
            animation: wave-pulse 10s ease-in-out infinite;
        }
        .wave-1 { top: -220px; right: -120px; animation-delay: 0s; }
        .wave-2 { bottom: -260px; left: -140px; animation-delay: -3.8s; }
        .beam {
            position: absolute;
            width: 340px;
            height: 2px;
            background: linear-gradient(90deg, transparent, rgba(251, 191, 36, 0.9), transparent);
            opacity: 0.35;
            filter: blur(0.2px);
            animation: beam-shift 5.6s linear infinite;
        }
        .beam-1 { --beam-rot: -17deg; top: 22%; right: 8%; transform: rotate(var(--beam-rot)); }
        .beam-2 { --beam-rot: 15deg; bottom: 20%; left: 10%; transform: rotate(var(--beam-rot)); animation-delay: -2.1s; }
        .lattice-dots {
            position: absolute;
            width: 260px;
            height: 220px;
            top: 44%;
            left: 48%;
            transform: translate(-50%, -50%) rotate(-8deg);
            opacity: 0.45;
            background-image: radial-gradient(rgba(251, 191, 36, 0.5) 1.4px, transparent 1.4px);
            background-size: 16px 16px;
            mask-image: radial-gradient(circle, black 45%, transparent 100%);
            animation: lattice-drift 14s linear infinite;
        }
        .signal-node {
            position: absolute;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 0 0 rgba(251, 191, 36, 0.55);
            animation: node-spark 3.2s ease-out infinite;
        }
        .node-1 { top: 37%; left: 61%; animation-delay: 0.3s; }
        .node-2 { top: 62%; left: 36%; animation-delay: 1.2s; }
        .node-3 { top: 26%; left: 28%; animation-delay: 2.2s; }
        @keyframes float { 0%, 100% { transform: translateY(0) rotate(0deg); } 50% { transform: translateY(-20px) rotate(5deg); } }
        @keyframes electron-flow { 0% { opacity: 0; transform: translateX(-100%) scaleX(0.5); } 50% { opacity: 1; transform: translateX(50%) scaleX(1); } 100% { opacity: 0; transform: translateX(200%) scaleX(0.5); } }
        @keyframes ripple { 0% { width: 0px; height: 0px; opacity: 1; } 100% { width: 60px; height: 60px; opacity: 0; border-width: 0px; } }
        @keyframes wave-pulse {
            0%, 100% { transform: scale(0.92); opacity: 0.18; }
            50% { transform: scale(1.06); opacity: 0.34; }
        }
        @keyframes beam-shift {
            0% { opacity: 0; transform: translateX(-80px) rotate(var(--beam-rot, 0deg)); }
            20% { opacity: 0.42; }
            80% { opacity: 0.38; }
            100% { opacity: 0; transform: translateX(80px) rotate(var(--beam-rot, 0deg)); }
        }
        @keyframes lattice-drift {
            0% { transform: translate(-50%, -50%) rotate(-8deg); }
            50% { transform: translate(-47%, -52%) rotate(-4deg); }
            100% { transform: translate(-50%, -50%) rotate(-8deg); }
        }
        @keyframes node-spark {
            0% { box-shadow: 0 0 0 0 rgba(251, 191, 36, 0.55); transform: scale(1); }
            70% { box-shadow: 0 0 0 16px rgba(251, 191, 36, 0); transform: scale(1.2); }
            100% { box-shadow: 0 0 0 0 rgba(251, 191, 36, 0); transform: scale(1); }
        }

        .hero h1 { 
            font-size: 4rem; font-weight: 800; line-height: 1.1; margin-bottom: 1.5rem; letter-spacing: -0.02em; text-transform: uppercase; 
        }
        .hero-acronym {
            margin: 0 auto 1rem;
            max-width: 90ch;
            color: var(--primary);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            font-size: 0.72rem;
            font-weight: 600;
        }
        .hero h1 span { display: block; color: var(--text-main); }
        .hero h1 .highlight { 
            background: linear-gradient(to right, var(--highlight) 20%, var(--primary) 80%); 
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
        }
        .hero p { font-size: 1.2rem; color: var(--text-muted); max-width: 70ch; margin: 0 auto 3rem; font-weight: 300; }
        .cta-btn {
            display: inline-block; padding: 1rem 3rem; background: transparent; color: var(--primary); font-weight: 700; border: 1px solid var(--primary);
            border-radius: 50px; cursor: pointer; font-size: 1rem; transition: all 0.3s; text-transform: uppercase; letter-spacing: 0.1em;
        }
        .cta-btn:hover { background: var(--primary); color: #000; box-shadow: 0 0 25px rgba(251, 191, 36, 0.4); }
        [data-theme="light"] .cta-btn:hover { color: #fff; }

        /* --- SECTIONS --- */
        .page-section { display: none; animation: fadeIn 0.8s ease; position: relative; isolation: isolate; }
        .page-section.active { display: block; }
        .container { max-width: 1200px; margin: 0 auto; padding: 5rem 2rem; }
        .page-section > .container { position: relative; z-index: 2; }

        /* SECTION BACKGROUNDS (CONTEXTUAL) */
        #research {
            background:
                radial-gradient(circle at 12% 18%, rgba(251, 191, 36, 0.12), transparent 34%),
                radial-gradient(circle at 86% 78%, rgba(180, 83, 9, 0.16), transparent 42%),
                linear-gradient(180deg, rgba(255, 255, 255, 0.018), transparent 52%);
        }
        #research::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(var(--grid-color) 1px, transparent 1px),
                linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
            background-size: 56px 56px;
            opacity: 0.95;
            pointer-events: none;
            z-index: 0;
        }
        #research::after {
            content: "";
            position: absolute;
            inset: 0;
            background:
                repeating-linear-gradient(30deg, transparent 0 82px, rgba(251, 191, 36, 0.05) 82px 84px),
                repeating-linear-gradient(-30deg, transparent 0 82px, rgba(251, 191, 36, 0.05) 82px 84px);
            mask-image: linear-gradient(to bottom, transparent 0%, black 22%, black 78%, transparent 100%);
            opacity: 0.46;
            pointer-events: none;
            z-index: 1;
        }

        #facilities {
            background:
                radial-gradient(circle at 80% 22%, rgba(251, 191, 36, 0.14), transparent 36%),
                linear-gradient(160deg, rgba(255, 255, 255, 0.02), rgba(0, 0, 0, 0));
        }
        #facilities::before {
            content: "";
            position: absolute;
            inset: 0;
            background:
                repeating-linear-gradient(
                    90deg,
                    transparent 0 78px,
                    rgba(251, 191, 36, 0.05) 78px 79px
                ),
                repeating-linear-gradient(
                    0deg,
                    transparent 0 78px,
                    rgba(251, 191, 36, 0.04) 78px 79px
                );
            mask-image: linear-gradient(to bottom, transparent 0%, black 14%, black 86%, transparent 100%);
            opacity: 0.9;
            pointer-events: none;
            z-index: 0;
        }
        #facilities::after {
            content: "";
            position: absolute;
            inset: 0;
            background:
                linear-gradient(90deg, rgba(251, 191, 36, 0.09), transparent 28%),
                linear-gradient(270deg, rgba(251, 191, 36, 0.07), transparent 30%);
            mask-image: linear-gradient(to bottom, transparent 0%, black 20%, black 82%, transparent 100%);
            opacity: 0.45;
            pointer-events: none;
            z-index: 1;
        }

        #projects {
            background:
                radial-gradient(circle at 16% 74%, rgba(251, 191, 36, 0.11), transparent 32%),
                radial-gradient(circle at 88% 18%, rgba(180, 83, 9, 0.14), transparent 38%),
                linear-gradient(135deg, rgba(251, 191, 36, 0.06) 0%, transparent 38%);
        }
        #projects::before {
            content: "";
            position: absolute;
            inset: 0;
            background:
                repeating-linear-gradient(125deg, transparent 0 90px, rgba(251, 191, 36, 0.07) 90px 94px),
                repeating-linear-gradient(305deg, transparent 0 90px, rgba(251, 191, 36, 0.06) 90px 94px);
            opacity: 0.58;
            pointer-events: none;
            z-index: 0;
        }
        #projects::after {
            content: "";
            position: absolute;
            inset: 0;
            background:
                radial-gradient(circle at 24% 28%, rgba(251, 191, 36, 0.25) 1.8px, transparent 2.6px),
                radial-gradient(circle at 64% 60%, rgba(251, 191, 36, 0.22) 1.6px, transparent 2.4px),
                radial-gradient(circle at 82% 34%, rgba(251, 191, 36, 0.22) 1.6px, transparent 2.4px);
            background-repeat: no-repeat;
            opacity: 0.5;
            pointer-events: none;
            z-index: 1;
        }

        #publications {
            background:
                radial-gradient(circle at 14% 20%, rgba(251, 191, 36, 0.1), transparent 33%),
                radial-gradient(circle at 86% 80%, rgba(180, 83, 9, 0.13), transparent 44%),
                linear-gradient(180deg, rgba(255, 255, 255, 0.018), transparent 58%);
        }
        #publications::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image:
                radial-gradient(rgba(251, 191, 36, 0.11) 1px, transparent 1px);
            background-size: 20px 20px;
            opacity: 0.45;
            pointer-events: none;
            z-index: 0;
        }
        #publications::after {
            content: "";
            position: absolute;
            inset: 0;
            background:
                linear-gradient(180deg, rgba(251, 191, 36, 0.08), transparent 24%),
                linear-gradient(0deg, rgba(251, 191, 36, 0.06), transparent 28%);
            mask-image: linear-gradient(to bottom, transparent 0%, black 12%, black 88%, transparent 100%);
            opacity: 0.36;
            pointer-events: none;
            z-index: 1;
        }

        #team {
            background:
                radial-gradient(circle at 22% 22%, rgba(251, 191, 36, 0.11), transparent 36%),
                radial-gradient(circle at 80% 70%, rgba(180, 83, 9, 0.14), transparent 42%),
                linear-gradient(180deg, rgba(255, 255, 255, 0.016), transparent 60%);
        }
        #team::before {
            content: "";
            position: absolute;
            inset: 0;
            background:
                radial-gradient(circle at 22% 30%, rgba(251, 191, 36, 0.35) 1.4px, transparent 2px),
                radial-gradient(circle at 44% 58%, rgba(251, 191, 36, 0.28) 1.2px, transparent 2px),
                radial-gradient(circle at 67% 26%, rgba(251, 191, 36, 0.32) 1.6px, transparent 2px),
                radial-gradient(circle at 80% 52%, rgba(251, 191, 36, 0.28) 1.3px, transparent 2px),
                radial-gradient(circle at 33% 76%, rgba(251, 191, 36, 0.3) 1.5px, transparent 2px);
            background-repeat: no-repeat;
            opacity: 0.6;
            pointer-events: none;
            z-index: 0;
        }
        #team::after {
            content: "";
            position: absolute;
            inset: 0;
            background:
                linear-gradient(90deg, transparent 0 12%, rgba(251, 191, 36, 0.05) 12% 13%, transparent 13% 100%),
                linear-gradient(90deg, transparent 0 38%, rgba(251, 191, 36, 0.05) 38% 39%, transparent 39% 100%),
                linear-gradient(90deg, transparent 0 64%, rgba(251, 191, 36, 0.05) 64% 65%, transparent 65% 100%);
            opacity: 0.45;
            pointer-events: none;
            z-index: 1;
        }
        #join {
            background:
                radial-gradient(circle at 18% 24%, rgba(251, 191, 36, 0.1), transparent 36%),
                radial-gradient(circle at 84% 76%, rgba(180, 83, 9, 0.12), transparent 42%),
                linear-gradient(180deg, rgba(255, 255, 255, 0.014), transparent 60%);
        }
        #join::before {
            content: "";
            position: absolute;
            inset: 0;
            background:
                repeating-linear-gradient(90deg, transparent 0 90px, rgba(251, 191, 36, 0.05) 90px 91px),
                repeating-linear-gradient(0deg, transparent 0 90px, rgba(251, 191, 36, 0.04) 90px 91px);
            opacity: 0.5;
            pointer-events: none;
            z-index: 0;
        }

        [data-theme="light"] #research::before,
        [data-theme="light"] #facilities::before,
        [data-theme="light"] #projects::before,
        [data-theme="light"] #publications::before,
        [data-theme="light"] #team::before {
            opacity: 0.55;
        }
        [data-theme="light"] #research {
            background:
                radial-gradient(circle at 10% 18%, rgba(217, 119, 6, 0.12), transparent 34%),
                radial-gradient(circle at 88% 78%, rgba(15, 23, 42, 0.1), transparent 42%),
                linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(248, 250, 252, 0.9));
        }
        [data-theme="light"] #research::before {
            background-image:
                linear-gradient(rgba(15, 23, 42, 0.06) 1px, transparent 1px),
                linear-gradient(90deg, rgba(15, 23, 42, 0.06) 1px, transparent 1px);
            opacity: 0.42;
        }
        [data-theme="light"] #research::after {
            background:
                repeating-linear-gradient(30deg, transparent 0 82px, rgba(217, 119, 6, 0.08) 82px 84px),
                repeating-linear-gradient(-30deg, transparent 0 82px, rgba(217, 119, 6, 0.08) 82px 84px);
            opacity: 0.32;
        }

        [data-theme="light"] #facilities {
            background:
                radial-gradient(circle at 82% 20%, rgba(217, 119, 6, 0.12), transparent 36%),
                linear-gradient(160deg, rgba(241, 245, 249, 0.95), rgba(248, 250, 252, 0.95));
        }
        [data-theme="light"] #facilities::before {
            background:
                repeating-linear-gradient(90deg, transparent 0 78px, rgba(15, 23, 42, 0.08) 78px 79px),
                repeating-linear-gradient(0deg, transparent 0 78px, rgba(15, 23, 42, 0.07) 78px 79px);
            opacity: 0.38;
        }
        [data-theme="light"] #facilities::after {
            background:
                linear-gradient(90deg, rgba(217, 119, 6, 0.12), transparent 26%),
                linear-gradient(270deg, rgba(217, 119, 6, 0.09), transparent 30%);
            opacity: 0.3;
        }

        [data-theme="light"] #projects {
            background:
                radial-gradient(circle at 18% 76%, rgba(217, 119, 6, 0.12), transparent 32%),
                radial-gradient(circle at 84% 20%, rgba(71, 85, 105, 0.12), transparent 38%),
                linear-gradient(135deg, rgba(255, 247, 237, 0.9), rgba(248, 250, 252, 0.9));
        }
        [data-theme="light"] #projects::before {
            background:
                repeating-linear-gradient(125deg, transparent 0 90px, rgba(217, 119, 6, 0.1) 90px 94px),
                repeating-linear-gradient(305deg, transparent 0 90px, rgba(217, 119, 6, 0.08) 90px 94px);
            opacity: 0.42;
        }
        [data-theme="light"] #projects::after {
            background:
                radial-gradient(circle at 24% 28%, rgba(217, 119, 6, 0.34) 1.8px, transparent 2.6px),
                radial-gradient(circle at 64% 60%, rgba(71, 85, 105, 0.28) 1.6px, transparent 2.4px),
                radial-gradient(circle at 82% 34%, rgba(217, 119, 6, 0.3) 1.6px, transparent 2.4px);
            opacity: 0.42;
        }

        [data-theme="light"] #publications {
            background:
                radial-gradient(circle at 14% 18%, rgba(217, 119, 6, 0.12), transparent 33%),
                radial-gradient(circle at 88% 82%, rgba(71, 85, 105, 0.1), transparent 44%),
                linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.9));
        }
        [data-theme="light"] #publications::before {
            background-image:
                radial-gradient(rgba(15, 23, 42, 0.16) 1px, transparent 1px);
            opacity: 0.28;
        }
        [data-theme="light"] #publications::after {
            background:
                linear-gradient(180deg, rgba(217, 119, 6, 0.11), transparent 24%),
                linear-gradient(0deg, rgba(71, 85, 105, 0.08), transparent 28%);
            opacity: 0.24;
        }

        [data-theme="light"] #team {
            background:
                radial-gradient(circle at 24% 22%, rgba(217, 119, 6, 0.12), transparent 36%),
                radial-gradient(circle at 80% 70%, rgba(71, 85, 105, 0.12), transparent 42%),
                linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.9));
        }
        [data-theme="light"] #team::before {
            background:
                radial-gradient(circle at 22% 30%, rgba(217, 119, 6, 0.42) 1.5px, transparent 2px),
                radial-gradient(circle at 44% 58%, rgba(71, 85, 105, 0.32) 1.3px, transparent 2px),
                radial-gradient(circle at 67% 26%, rgba(217, 119, 6, 0.38) 1.6px, transparent 2px),
                radial-gradient(circle at 80% 52%, rgba(71, 85, 105, 0.32) 1.3px, transparent 2px),
                radial-gradient(circle at 33% 76%, rgba(217, 119, 6, 0.36) 1.5px, transparent 2px);
            opacity: 0.46;
        }
        [data-theme="light"] #team::after {
            background:
                linear-gradient(90deg, transparent 0 12%, rgba(15, 23, 42, 0.08) 12% 13%, transparent 13% 100%),
                linear-gradient(90deg, transparent 0 38%, rgba(15, 23, 42, 0.08) 38% 39%, transparent 39% 100%),
                linear-gradient(90deg, transparent 0 64%, rgba(15, 23, 42, 0.08) 64% 65%, transparent 65% 100%);
            opacity: 0.3;
        }
        [data-theme="light"] #join {
            background:
                radial-gradient(circle at 18% 24%, rgba(217, 119, 6, 0.11), transparent 36%),
                radial-gradient(circle at 84% 76%, rgba(71, 85, 105, 0.12), transparent 42%),
                linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.92));
        }
        [data-theme="light"] #join::before {
            background:
                repeating-linear-gradient(90deg, transparent 0 90px, rgba(15, 23, 42, 0.08) 90px 91px),
                repeating-linear-gradient(0deg, transparent 0 90px, rgba(15, 23, 42, 0.07) 90px 91px);
            opacity: 0.34;
        }
        .section-header { margin-bottom: 4rem; text-align: center; }
        .section-header h2 { font-size: 2.4rem; font-weight: 700; color: var(--text-main); margin-bottom: 0.5rem; letter-spacing: -0.01em; }
        .section-header p { color: var(--primary); text-transform: uppercase; letter-spacing: 0.15em; font-size: 0.85rem; }
        
        .intro-text {
            text-align: center; max-width: 72ch; margin: 0 auto 3rem; color: var(--text-muted); font-size: 1.05rem; font-weight: 300;
        }

        /* GRIDS & CARDS */
        .grid { display: grid; gap: 2rem; }
        .grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
        .grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
        
        .card {
            background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); 
            padding: 2.2rem; transition: all 0.35s ease; position: relative; box-shadow: var(--shadow-soft);
        }
        .card:hover { transform: translateY(-6px); border-color: var(--primary); box-shadow: var(--shadow); }
        .card-tag { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--secondary); margin-bottom: 1.5rem; display: inline-block; border-bottom: 1px solid var(--secondary); padding-bottom: 2px; }
        .card h3 { margin-bottom: 1rem; font-size: 1.4rem; color: var(--text-main); font-weight: 600; }
        .card p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; }
        .facilities-block { margin-top: 2rem; }
        .facilities-title {
            margin: 0 0 1rem;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-main);
            letter-spacing: 0.01em;
        }
        .facility-line {
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--secondary);
            margin-bottom: 0.4rem;
        }
        .facility-list {
            margin: 0.65rem 0 0;
            padding-left: 0;
            list-style: none;
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .facility-list li {
            position: relative;
            margin: 0.28rem 0;
            padding-left: 1.15rem;
            line-height: 1.5;
        }
        .facility-list li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0.6em;
            width: 0.42rem;
            height: 0.42rem;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(251, 191, 36, 0.98) 0%, rgba(180, 83, 9, 0.85) 72%, rgba(180, 83, 9, 0.2) 100%);
            box-shadow: 0 0 0 2px rgba(251, 191, 36, 0.12), 0 0 10px rgba(251, 191, 36, 0.28);
        }
        .facility-list li::after {
            content: "";
            position: absolute;
            left: 0.2rem;
            top: 1.1em;
            bottom: -0.45rem;
            width: 1px;
            background: linear-gradient(180deg, rgba(251, 191, 36, 0.25), rgba(251, 191, 36, 0));
        }
        .facility-list li:last-child::after { display: none; }
        [data-theme="light"] .facility-list li::before {
            background: radial-gradient(circle, rgba(217, 119, 6, 0.95) 0%, rgba(146, 64, 14, 0.82) 72%, rgba(146, 64, 14, 0.2) 100%);
            box-shadow: 0 0 0 2px rgba(217, 119, 6, 0.1), 0 0 8px rgba(217, 119, 6, 0.2);
        }
        [data-theme="light"] .facility-list li::after {
            background: linear-gradient(180deg, rgba(217, 119, 6, 0.2), rgba(217, 119, 6, 0));
        }
        .facility-meta {
            margin-top: 0.6rem;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .facility-budget {
            margin-top: 0.5rem;
            display: flex;
            flex-wrap: wrap;
            gap: 0.45rem;
        }
        .facility-badge {
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 0.17rem 0.55rem;
            font-size: 0.75rem;
            color: var(--text-muted);
            background: rgba(251, 191, 36, 0.05);
        }
        .join-grid .card { min-height: 220px; }
        .join-cta-wrap {
            margin-top: 2rem;
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 0.35rem;
            width: 100%;
        }
        .join-cta-text {
            color: var(--text-muted);
            margin: 0;
            font-size: 0.95rem;
        }
        .join-cta-btn {
            text-decoration: none;
            margin: 0 auto;
        }

        /* PUBLICATIONS (BIB STYLE) */
        .pubs-controls {
            display: grid; grid-template-columns: 1fr; align-items: center; margin-bottom: 1rem; padding: 1rem;
            background: rgba(255,255,255,0.03); border: 1px solid var(--border); border-radius: var(--radius); gap: 1rem;
        }
        [data-theme="light"] .pubs-controls { background: rgba(0,0,0,0.03); }

        .filter-group { display: flex; align-items: center; gap: 1rem; min-width: 0; }
        .search-row { width: 100%; }
        .filters-row {
            width: 100%;
            display: grid;
            grid-template-columns: 160px 210px minmax(220px, 1fr) auto 190px;
            gap: 0.8rem;
            align-items: center;
        }
        .pub-search {
            min-width: 0;
            width: 100%;
            max-width: 520px;
            background: var(--bg-dark);
            color: var(--text-main);
            border: 1px solid var(--text-muted);
            padding: 0.55rem 0.8rem;
            border-radius: var(--radius-sm);
            outline: none;
            font-family: 'Inter', sans-serif;
        }
        .pub-search:focus { border-color: var(--primary); }
        .year-select {
            background: var(--bg-dark); color: var(--text-main); border: 1px solid var(--text-muted);
            width: 100%; min-width: 0;
            padding: 0.55rem 1rem; border-radius: var(--radius-sm); outline: none; font-family: 'Inter', sans-serif; cursor: pointer; transition: border 0.3s;
        }
        .year-select:hover { border-color: var(--primary); }
        .checkbox-filter {
            display: inline-flex; align-items: center; gap: 0.45rem; font-size: 0.86rem; color: var(--text-muted);
            border: 1px solid var(--text-muted); border-radius: var(--radius-sm); padding: 0.48rem 0.7rem;
        }
        .checkbox-filter input { accent-color: var(--primary); }
        .sort-btn {
            background: transparent; border: 1px solid var(--text-muted); color: var(--text-main);
            padding: 0.55rem 1rem; border-radius: var(--radius-sm); cursor: pointer; display: flex; align-items: center; gap: 0.5rem; font-size: 0.9rem; transition: all 0.3s;
        }
        .sort-btn:hover { border-color: var(--primary); color: var(--primary); }
        .sort-btn.asc .sort-icon { transform: rotate(180deg); }
        .active-filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1rem 0 0.5rem; min-height: 1.8rem; }
        .filter-chip {
            font-size: 0.78rem; color: var(--text-main); border: 1px solid var(--border);
            border-radius: 999px; padding: 0.25rem 0.7rem; background: rgba(251, 191, 36, 0.08);
        }
        .pub-summary { color: var(--text-muted); font-size: 0.9rem; margin: 0.3rem 0 1rem; }
        .featured-wrap { margin: 0 0 1.3rem; }
        .featured-wrap h3 { font-size: 1rem; font-weight: 600; margin: 0 0 0.7rem; color: var(--text-main); }
        .featured-pubs { display: grid; gap: 0.7rem; }
        .featured-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 0.7rem; }
        .featured-item {
            border: 1px dashed var(--border); border-radius: var(--radius-sm); padding: 0.75rem 0.9rem;
            background: rgba(251, 191, 36, 0.04);
        }
        .featured-main { grid-row: 1 / span 2; }
        .featured-item a, .featured-item span { color: var(--primary); font-weight: 600; line-height: 1.35; display: block; }
        .featured-main a, .featured-main span { font-size: 1.02rem; }
        .featured-item small { display: block; color: var(--text-muted); margin-top: 0.25rem; font-size: 0.8rem; }
        
        .pub-item {
            display: grid; grid-template-columns: 72px 1fr; gap: 1.25rem; background: var(--bg-card);
            padding: 2rem; margin-bottom: 1.5rem; align-items: flex-start; 
            animation: fadeIn 0.5s ease; border: 1px solid var(--border); border-radius: var(--radius);
            position: relative;
        }
        .pub-year { 
            font-size: 1.35rem; font-weight: 800; color: var(--text-muted); opacity: 0.5; min-width: 60px; text-align: center;
        }
        .pub-content { max-width: 76ch; }
        .pub-tags { display: flex; flex-wrap: wrap; gap: 0.35rem; margin: 0.05rem 0 0.6rem; }
        .pub-tag {
            font-size: 0.7rem; letter-spacing: 0.02em; text-transform: uppercase;
            border: 1px solid var(--border); border-radius: 999px; padding: 0.18rem 0.55rem;
            color: var(--text-muted); background: rgba(251, 191, 36, 0.06);
        }
        .pub-tag-doi { color: var(--primary); border-color: rgba(251, 191, 36, 0.35); }
        
        .pub-authors {
            font-size: 0.89rem; color: var(--text-muted); margin-bottom: 0.38rem; line-height: 1.45;
            display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
        }
        .pub-title-link { 
            font-size: 1.02rem; font-weight: 700; color: var(--primary); text-decoration: none; 
            margin-bottom: 0.42rem; display: block; line-height: 1.4;
        }
        .pub-title-link:hover { text-decoration: underline; color: var(--secondary); }
        .pub-meta { font-size: 0.88rem; color: var(--text-muted); font-style: italic; }
        .pub-meta-extra { display: none; margin-top: 0.45rem; color: var(--text-muted); font-size: 0.84rem; }
        .pub-meta-extra.open { display: block; }
        .pub-actions { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-top: 0.8rem; }
        .mini-btn {
            border: 1px solid var(--border); color: var(--text-muted); background: transparent;
            border-radius: var(--radius-sm); font-size: 0.76rem; padding: 0.28rem 0.58rem; cursor: pointer;
            transition: all 0.25s;
        }
        .mini-btn:hover { color: var(--primary); border-color: var(--primary); }
        .mini-btn-primary {
            border-color: var(--primary);
            color: #111;
            background: var(--primary);
            font-weight: 600;
        }
        .mini-btn-primary:hover {
            color: #000;
            background: #f5c84c;
            border-color: #f5c84c;
        }
        
        .gemini-btn {
            margin-top: 1rem; background: transparent; color: var(--text-muted);
            border: 1px solid var(--border); padding: 0.36rem 0.8rem; border-radius: var(--radius-sm);
            font-size: 0.75rem; cursor: pointer; transition: all 0.3s; text-transform: uppercase; letter-spacing: 0.05em;
        }
        .gemini-btn:hover { border-color: var(--primary); color: var(--primary); }
        .ai-result {
            margin-top: 1rem;
            padding: 1rem;
            background: rgba(251, 191, 36, 0.05);
            border-left: 2px solid var(--primary);
            font-size: 0.9rem;
            color: var(--text-muted);
            display: none;
            position: relative;
            max-width: 100%;
            max-height: 320px;
            overflow-y: auto;
            overflow-x: hidden;
            overflow-wrap: anywhere;
            word-break: normal;
            -webkit-overflow-scrolling: touch;
            overscroll-behavior: contain;
            touch-action: pan-y;
        }
        .ai-result::after {
            content: "";
            position: sticky;
            display: none;
            left: 0;
            bottom: -1px;
            width: 100%;
            height: 24px;
            margin-top: -24px;
            background: linear-gradient(180deg, rgba(18, 18, 18, 0), rgba(18, 18, 18, 0.92));
            pointer-events: none;
        }
        .ai-result.show-scroll-hint::after { display: block; }
        .ai-result.scroll-end::after { display: none; }
        [data-theme="light"] .ai-result::after {
            background: linear-gradient(180deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.94));
        }
        .pub-load-more-wrap { display: flex; justify-content: center; margin-top: 0.5rem; }
        .pub-skeleton {
            height: 90px; border-radius: var(--radius-sm); border: 1px solid var(--border);
            background: linear-gradient(90deg, rgba(255,255,255,0.04) 25%, rgba(255,255,255,0.1) 37%, rgba(255,255,255,0.04) 63%);
            background-size: 400% 100%;
            animation: skeleton 1.2s ease infinite;
            margin-bottom: 0.8rem;
        }
        @keyframes skeleton { 0% { background-position: 100% 0; } 100% { background-position: 0 0; } }

        /* TEAM SECTION V2 */
        .team-controls {
            display: grid;
            grid-template-columns: minmax(220px, 1fr) 220px 240px;
            gap: 0.8rem;
            margin-bottom: 0.9rem;
        }
        .team-index {
            display: flex;
            flex-wrap: wrap;
            gap: 0.45rem;
            margin: 0.3rem 0 0.8rem;
        }
        .team-index a {
            font-size: 0.78rem;
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 0.23rem 0.62rem;
            color: var(--text-muted);
            text-decoration: none;
            background: rgba(251, 191, 36, 0.05);
        }
        .team-index a:hover { color: var(--primary); border-color: var(--primary); }
        .team-sections { display: grid; gap: 1.4rem; }
        .team-group { border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; background: rgba(255,255,255,0.01); }
        .team-group-title {
            display: flex; justify-content: space-between; align-items: center;
            margin-bottom: 0.8rem; font-size: 1rem; font-weight: 600; color: var(--text-main);
        }
        .team-count {
            font-size: 0.75rem; color: var(--text-muted); border: 1px solid var(--border);
            border-radius: 999px; padding: 0.12rem 0.45rem;
        }
        .team-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1rem; }

        /* TEAM CARDS STYLES */
        .team-card { text-align: center; border: 1px solid transparent; background: transparent; }
        .team-img { width: 140px; height: 140px; border-radius: 50%; object-fit: cover; border: 2px solid var(--primary); padding: 5px; margin-bottom: 1.5rem; filter: grayscale(100%); transition: all 0.4s; }
        .team-card:hover .team-img { filter: grayscale(0%); box-shadow: 0 0 20px rgba(251, 191, 36, 0.3); }
        .role { color: var(--primary); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 0.5rem; }
        .research-badge { font-size: 0.75rem; color: var(--text-muted); border: 1px solid var(--border); padding: 4px 10px; border-radius: 12px; display: inline-block; margin-bottom: 10px; background: rgba(251, 191, 36, 0.05); }
        .team-role-meta { color: var(--text-muted); font-size: 0.8rem; margin-bottom: 0.45rem; }
        .team-toggle {
            border: 1px solid var(--border); background: transparent; color: var(--text-muted);
            font-size: 0.75rem; padding: 0.25rem 0.6rem; border-radius: var(--radius-sm); cursor: pointer;
            margin-top: 0.25rem;
        }
        .team-toggle:hover { border-color: var(--primary); color: var(--primary); }
        .team-extra { display: none; margin-top: 0.55rem; font-size: 0.82rem; color: var(--text-muted); line-height: 1.45; }
        .team-extra.open { display: block; }
        
        .social-links { display: flex; justify-content: center; gap: 12px; margin-top: 15px; }
        .social-btn { width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border-radius: 50%; border: 1px solid var(--border); transition: all 0.3s; }
        .social-btn svg { width: 16px; height: 16px; fill: var(--text-muted); transition: fill 0.3s; }
        .social-btn:hover { border-color: var(--primary); background: rgba(251, 191, 36, 0.1); transform: translateY(-2px); }
        .social-btn:hover svg { fill: var(--primary); }
        .social-btn.orcid:hover { border-color: #a6ce39; background: rgba(166, 206, 57, 0.1); }
        .social-btn.orcid:hover svg { fill: #a6ce39; }

        /* FOOTER & CHAT */
        footer { text-align: center; padding: 4rem 2rem; color: var(--text-muted); border-top: 1px solid var(--border); margin-top: 4rem; }
        .chat-btn { position: fixed; bottom: 30px; right: 30px; width: 60px; height: 60px; background: var(--bg-card); border: 1px solid var(--primary); color: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; cursor: pointer; z-index: 2000; transition: all 0.3s; box-shadow: 0 4px 10px rgba(0,0,0,0.3); }
        .chat-btn:hover { background: var(--primary); color: #000; box-shadow: 0 0 20px var(--primary); }
        .chat-window { position: fixed; bottom: 100px; right: 30px; width: 350px; height: 500px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); display: flex; flex-direction: column; z-index: 2000; transform: translateY(20px); opacity: 0; pointer-events: none; transition: all 0.3s; box-shadow: var(--shadow); }
        .chat-window.open { transform: translateY(0); opacity: 1; pointer-events: all; }
        .toast-container {
            position: fixed;
            right: 30px;
            bottom: 106px;
            z-index: 2600;
            display: grid;
            gap: 0.45rem;
            pointer-events: none;
        }
        .toast {
            min-width: 180px;
            max-width: 320px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: var(--bg-card);
            color: var(--text-main);
            padding: 0.5rem 0.75rem;
            font-size: 0.84rem;
            box-shadow: var(--shadow-soft);
            opacity: 0;
            transform: translateY(8px);
            transition: opacity 0.2s ease, transform 0.2s ease;
        }
        .toast.show {
            opacity: 1;
            transform: translateY(0);
        }
        .toast-success { border-color: rgba(74, 222, 128, 0.45); }
        .toast-error { border-color: rgba(248, 113, 113, 0.5); }
        .chat-header { padding: 1rem; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; background: rgba(0,0,0,0.2); }
        .chat-body { flex: 1; padding: 1rem; overflow-y: auto; display: flex; flex-direction: column; gap: 1rem; }
        .chat-input { padding: 1rem; border-top: 1px solid var(--border); display: flex; gap: 0.5rem; }
        .chat-input input { flex: 1; background: var(--bg-dark); border: 1px solid var(--border); color: var(--text-main); padding: 0.8rem; outline: none; }
        .chat-input button { background: var(--primary); border: none; width: 40px; cursor: pointer; color: black; font-weight: bold; }
        .msg { padding: 0.8rem; max-width: 85%; font-size: 0.9rem; }
        .msg.bot { background: rgba(255,255,255,0.05); color: var(--text-main); align-self: flex-start; border: 1px solid var(--border); }
        .msg.user { background: rgba(251, 191, 36, 0.1); color: var(--primary); align-self: flex-end; border: 1px solid var(--primary); }
        .msg p { margin: 0 0 0.5rem; }
        .msg p:last-child { margin-bottom: 0; }
        .msg ul { margin: 0.2rem 0 0.6rem 1rem; padding: 0; }
        .msg li { margin: 0.2rem 0; }
        .msg strong { color: var(--highlight); font-weight: 700; }
        .msg code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: rgba(255,255,255,0.08); padding: 0 4px; border-radius: 4px; }
        .ai-result p { margin: 0 0 0.45rem; }
        .ai-result p:last-child { margin-bottom: 0; }
        .ai-result h1, .ai-result h2, .ai-result h3, .ai-result h4, .ai-result h5, .ai-result h6 {
            margin: 0 0 0.5rem;
            color: var(--text-main);
            font-size: 0.95rem;
            line-height: 1.35;
            font-weight: 700;
        }
        .ai-result ol { margin: 0.2rem 0 0.6rem 1rem; padding: 0; }
        .ai-result ul { margin: 0.2rem 0 0.6rem 1rem; padding: 0; }
        .ai-result li { margin: 0.2rem 0; }

        @keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

        @media (max-width: 768px) {
            nav { justify-content: flex-start; gap: 0.55rem; }
            .logo-container { margin-right: auto; }
            .logo-meaning {
                left: 0;
                transform: translateX(0) translateY(4px);
                max-width: min(86vw, 390px);
                white-space: normal;
                border-radius: var(--radius-sm);
                line-height: 1.35;
            }
            .logo-container:hover .logo-meaning,
            .logo-container:focus-within .logo-meaning {
                transform: translateX(0) translateY(0);
            }
            .nav-links { 
                display: none; 
                flex-direction: column; 
                position: absolute; 
                top: 70px; 
                left: 0; 
                width: 100%; 
                background: var(--bg-dark);
                border-bottom: 1px solid var(--border); 
                padding: 1rem; 
                text-align: center; 
                box-shadow: 0 10px 20px rgba(0,0,0,0.5);
            }
            .nav-links.active { display: flex; }
            .hamburger { display: block; margin-left: 0; }
            .theme-toggle { margin-left: 0.5rem; }
            .toast-container { right: 16px; bottom: 84px; }
            
            .hero h1 { 
                font-size: clamp(1.8rem, 8vw, 2.5rem);
                line-height: 1.1;
                overflow-wrap: break-word; 
                word-wrap: break-word;
                word-break: break-word;
                hyphens: auto;
            }
            .hero-acronym {
                font-size: 0.64rem;
                line-height: 1.35;
                max-width: 44ch;
                margin-bottom: 0.75rem;
            }
            .photon-wave { width: 360px; height: 360px; opacity: 0.18; }
            .beam { display: none; }
            .lattice-dots { width: 190px; height: 150px; opacity: 0.32; }
            .node-3 { display: none; }
            
            .pubs-controls { justify-content: center; }
            .pub-search { min-width: 100%; width: 100%; }
            .filter-group { width: 100%; flex-wrap: wrap; justify-content: center; }
            .filters-row { grid-template-columns: 1fr; }
            .year-select { width: 100%; }
            .checkbox-filter { width: 100%; justify-content: center; }
            .featured-grid { grid-template-columns: 1fr; }
            .featured-main { grid-row: auto; }
            .team-controls { grid-template-columns: 1fr; }
            .team-index { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 0.25rem; }
            .team-grid { grid-template-columns: 1fr; }
            .container { padding: 3rem 1rem; }
            .card { padding: 1.5rem; }
            .pub-item { grid-template-columns: 1fr; gap: 0.75rem; padding: 1.3rem; }
            .pub-year { text-align: left; font-size: 1rem; }
            .pub-actions { gap: 0.35rem; }
            .grid-2, .grid-3 { grid-template-columns: 1fr; }
            .pub-content { max-width: 100%; min-width: 0; }
            .ai-result { font-size: 0.88rem; padding: 0.85rem; max-height: 230px; }
            .ai-result ul { margin-left: 1.05rem; }
            #research::before,
            #facilities::before,
            #projects::before,
            #publications::before,
            #team::before,
            #join::before {
                opacity: 0.28;
            }
            #research::after,
            #facilities::after,
            #projects::after,
            #publications::after,
            #team::after {
                opacity: 0.2;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            .logo-plus::before,
            .logo-plus::after,
            .logo-scatter::before,
            .logo-scatter::after,
            .nano-hex,
            .circuit-line,
            .emitter::after,
            .photon-wave,
            .beam,
            .lattice-dots,
            .signal-node {
                animation: none !important;
            }
            .nano-scene::before {
                mix-blend-mode: normal;
                opacity: 0.8;
            }
        }
        
        .error-msg { 
            color: #ef4444; 
            font-size: 0.95rem; 
            margin-top: 10px; 
            border: 1px solid #ef4444; 
            padding: 20px; 
            border-radius: 8px; 
            background: rgba(239, 68, 68, 0.1);
            text-align: center;
        }
        .error-title { font-weight: bold; font-size: 1.2rem; margin-bottom: 10px; display: block; }