* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            height: 100%;
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            min-height: 100vh;
            background: linear-gradient(135deg, #fafafa 0%, #ffffff 50%, #f9f9f9 100%);
            color: #1a1a1a;
            line-height: 1.6;
            font-weight: 400;
        }

        header {
            text-align: center;
            padding: 10px 40px 8px;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.06);
            width: 100%;
            position: sticky;
            top: 0;
            z-index: 100;
        }

        header h4 {
            font-size: clamp(24px, 3.5vw, 36px);
            font-weight: 700;
            color: #000;
            margin-bottom: 8px;
            letter-spacing: -0.02em;
        }

        header p {
            font-size: clamp(15px, 2.8vw, 19px);
            color: #666;
            font-weight: 400;
            max-width: 600px;
            margin: 0 auto;
        }

        header a {
            color: #F0B90B;
            font-weight: 600;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        header a:hover {
            color: #e6a500;
        }

        #support-text {
            font-size: clamp(18px, 3vw, 24px);
            font-weight: 600;
            color: #000;
            text-align: center;
            margin: 15px auto 8px;
            padding: 16px 24px;
            background: white;
            border-radius: 20px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
            border: 1px solid rgba(0, 0, 0, 0.08);
            max-width: 1200px;
            width: 90%;
            letter-spacing: -0.01em;
            position: relative;
            overflow: hidden;
        }

        #support-text::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, #F0B90B 0%, #e6a500 100%);
        }

        .number-part {
            color: #F0B90B !important;
            font-weight: 700;
        }

        #happy-sci-intro {
            max-width: 1200px;
            width: 90%;
            margin: 8px auto 10px;
            padding: 16px 24px;
            background: white;
            border-radius: 24px;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
            border: 1px solid rgba(0, 0, 0, 0.04);
            text-align: left;
        }

        #happy-sci-intro h5:first-of-type {
            font-size: clamp(18px, 2.5vw, 24px);
            font-weight: 600;
            color: #000;
            margin: 0;
            letter-spacing: -0.01em;
        }

        #happy-sci-intro h3 {
            font-size: clamp(20px, 3vw, 24px);
            font-weight: 600;
            color: #000;
            margin: 16px 0 6px 0;
            letter-spacing: -0.01em;
        }

        #happy-sci-intro p {
            font-size: 16px;
            color: #555;
            line-height: 1.65;
            margin-bottom: 12px;
            font-weight: 400;
        }

        #happy-sci-intro a {
            color: #0066cc;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.2s ease;
        }

        #happy-sci-intro a:hover {
            color: #0052a3;
            text-decoration: underline;
        }

        #happy-sci-intro strong {
            color: #F0B90B;
            font-weight: 600;
        }

        #map {
            height: 60vh;
            width: 90%;
            max-width: 1200px;
            margin: 10px auto 30px;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 12px 48px rgba(0, 0, 0, 0.12);
            border: 1px solid rgba(0, 0, 0, 0.08);
        }

        footer {
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(20px);
            text-align: center;
            padding: 32px 20px;
            border-top: 1px solid rgba(0, 0, 0, 0.06);
            margin-top: 50px;
        }

        footer p {
            font-size: 16px;
            color: #666;
            font-weight: 400;
        }

        footer a {
            color: #1DA1F2;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.2s ease;
        }

        footer a:hover {
            color: #1a91da;
            text-decoration: underline;
        }

        /* Mobile optimizations */
        @media (max-width: 768px) {
            header {
                padding: 8px 20px 6px;
            }

            #support-text {
                padding: 12px 16px;
                margin: 10px auto 6px;
                font-size: clamp(16px, 3.5vw, 20px);
            }

            #happy-sci-intro {
                padding: 12px 16px;
                margin: 6px auto 8px;
            }

            #happy-sci-intro p {
                font-size: 15px;
                line-height: 1.6;
                margin-bottom: 10px;
            }

            #map {
                height: 65vh;
                margin: 8px auto 20px;
                border-radius: 16px;
                width: 90%;
            }

            footer {
                padding: 20px 20px;
                margin-top: 20px;
            }
        }

        /* Smooth transitions */
        * {
            transition: box-shadow 0.3s ease, transform 0.3s ease;
        }

        #support-text:hover,
        #happy-sci-intro:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        }

        /* Modern scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: #f1f1f1;
        }

        ::-webkit-scrollbar-thumb {
            background: #c1c1c1;
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: #a1a1a1;
        }

        /* Notion/Next.js inspired minimal overrides */
        :root {
            --surface: #ffffff;
            --background: #fafafa;
            --border: #eaeaea;
            --text: #111111;
            --muted: #666666;
            --link: #0070f3;
            --radius: 12px;
            --page-width: 1215px;
        }

        html, body {
            background: var(--background);
            color: var(--text);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            text-rendering: optimizeLegibility;
        }

        /* Header: minimal, sticky, subtle border */
        header {
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            padding: 12px 24px;
        }

        header h4 {
            letter-spacing: -0.01em;
        }

        header p {
            color: var(--muted);
        }

        header a {
            color: var(--link);
        }

        header a:hover {
            color: #0366d6;
        }

        /* Page containers sized like a Notion page */
        #support-text,
        #happy-sci-intro,
        #map {
            max-width: var(--page-width);
            width: min(var(--page-width), 92%);
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: none;
        }

        #support-text {
            margin: 20px auto 12px;
        }

        #happy-sci-intro {
            margin: 12px auto 12px;
        }

        #support-text::before {
            height: 3px;
        }

        /* Typography tuning */
        #happy-sci-intro h3,
        #happy-sci-intro h5:first-of-type {
            letter-spacing: -0.01em;
        }

        #happy-sci-intro p {
            color: var(--muted);
        }

        #happy-sci-intro a {
            color: var(--link);
        }

        #happy-sci-intro a:hover {
            color: #0366d6;
        }

        /* Map block: calm radius and spacing */
        #map {
            border-radius: calc(var(--radius) + 4px);
            margin: 14px auto 36px;
        }

        /* Footer minimal */
        footer {
            background: var(--surface);
            border-top: 1px solid var(--border);
            margin-top: 40px;
        }

        footer p {
            color: var(--muted);
        }

        footer a {
            color: var(--link);
        }

        footer a:hover {
            color: #0366d6;
        }

        /* Remove elevated hover motion for Notion calm feel */
        * {
            transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
        }

        #support-text:hover,
        #happy-sci-intro:hover {
            transform: none;
            box-shadow: none;
        }

        /* Mobile refinements */
        @media (max-width: 768px) {
            header {
                padding: 10px 16px;
            }

            #map {
                height: 60vh;
            }

            footer {
                margin-top: 24px;
            }
        }

        /* Visual polish v2: stronger, modern aesthetics while staying minimal */
        :root {
            --accent: #F0B90B;
            --page-width: 1215px; /* +10% from previous */
        }

        /* Layered subtle radial gradients + soft base gradient */
        body {
            background:
                radial-gradient(600px circle at 0% -10%, rgba(240,185,11,0.08), transparent 40%),
                radial-gradient(800px circle at 100% -20%, rgba(0,112,243,0.06), transparent 45%),
                linear-gradient(135deg, #fafafa 0%, #ffffff 55%, #f5f5f5 100%);
        }

        /* Header: translucent with subtle shadow and gradient title */
        header {
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: saturate(1.1) blur(10px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 0 rgba(0,0,0,0.02);
        }

        header h4 {
            font-weight: 800;
            background-image: linear-gradient(90deg, var(--accent) 0%, #e6a500 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        /* Cards: calmer with elevated hover feedback */
        #support-text,
        #happy-sci-intro,
        #map {
            border-color: rgba(0, 0, 0, 0.08);
        }

        #support-text:hover,
        #happy-sci-intro:hover {
            transform: translateY(-1px);
            border-color: rgba(0, 0, 0, 0.12);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        }

        /* Typography rhythm and readability */
        #happy-sci-intro {
            padding: 20px 28px;
        }

        #happy-sci-intro p {
            font-size: 17px;
            line-height: 1.75;
        }

        #support-text {
            font-size: clamp(20px, 3.2vw, 26px);
        }

        /* Link underline animation (Next.js docs vibe) */
        a {
            text-decoration: none;
            background-image: linear-gradient(currentColor, currentColor);
            background-size: 0% 2px;
            background-repeat: no-repeat;
            background-position: 0 100%;
            transition: background-size 0.2s ease;
        }

        a:hover {
            background-size: 100% 2px;
        }

        /* Dark mode */
        @media (prefers-color-scheme: dark) {
            :root {
                --surface: #0b0b0b;
                --background: #0a0a0a;
                --border: #1f1f1f;
                --text: #ededed;
                --muted: #a1a1a1;
                --link: #3291ff;
            }

            body {
                background:
                    radial-gradient(600px circle at 0% -10%, rgba(240,185,11,0.12), transparent 40%),
                    radial-gradient(800px circle at 100% -20%, rgba(50,145,255,0.10), transparent 45%),
                    linear-gradient(135deg, #0a0a0a 0%, #0d0d0d 55%, #0b0b0b 100%);
                color: var(--text);
            }

            header {
                background: rgba(14, 14, 14, 0.8);
                border-bottom: 1px solid var(--border);
                box-shadow: 0 1px 0 rgba(0,0,0,0.4);
            }

            #support-text,
            #happy-sci-intro,
            #map,
            footer {
                background: var(--surface);
                border-color: var(--border);
            }

            #support-text:hover,
            #happy-sci-intro:hover {
                border-color: #2a2a2a;
                box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
            }

            ::-webkit-scrollbar-track {
                background: #161616;
            }

            ::-webkit-scrollbar-thumb {
                background: #333333;
            }

            ::-webkit-scrollbar-thumb:hover {
                background: #444444;
            }
        }