/* ========================================
           CSS VARIABLES
           ======================================== */

        :root {
            /* === COLORS === */
            --bg-primary: #FFFFFF;
            --bg-secondary: #F8F9FA;
            --bg-tertiary: #F1F3F5;

            /* Text */
            --text-primary: #1A1A1D;
            --text-secondary: #3A3A3D;
            --text-tertiary: #6B6B6D;
            --text-disabled: #9B9B9D;

            /* Borders */
            --border-subtle: #E9ECEF;
            --border-default: #DEE2E6;
            --border-emphasis: #CED4DA;

            /* Purple Accent */
            --purple-primary: #7C3AED;
            --purple-dark: #6D28D9;
            --purple-ultra-light: #EDE9FE;

            /* State Colors */
            --green-success: #10B981;
            --amber-warning: #F59E0B;
            --red-error: #EF4444;
        }

        /* ========================================
           RESET & BASE STYLES
           ======================================== */

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            background: var(--bg-primary);
            color: var(--text-secondary);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* ========================================
           TYPOGRAPHY
           ======================================== */

        h1, h2, h3, h4, h5, h6 {
            color: var(--text-primary);
            font-weight: 700;
            line-height: 1.2;
        }

        h1 { font-size: 3rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }

        p { color: var(--text-tertiary); }

        @media (max-width: 768px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.5rem; }
            h3 { font-size: 1.25rem; }
        }

        /* ========================================
           UTILITIES
           ======================================== */

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 1.5rem;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 0 1rem;
            }
        }

        /* ========================================
           HEADER
           ======================================== */

        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-subtle);
            padding: 1.5rem 0;
            z-index: 1000;
            transition: all 0.3s ease;
        }

        .header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            border-bottom-color: var(--border-default);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-secondary);
            border: 2px solid var(--border-subtle);
            border-radius: 0.5rem;
            color: var(--purple-primary);
            font-size: 1.5rem;
        }

        .nav {
            display: flex;
            gap: 2rem;
            align-items: center;
        }

        .nav-link {
            color: var(--text-tertiary);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s ease;
        }

        .nav-link:hover {
            color: var(--purple-primary);
        }

        .btn {
            padding: 0.75rem 1.5rem;
            border-radius: 0.5rem;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: none;
            cursor: pointer;
            font-size: 1rem;
        }

        .btn-primary {
            background: var(--purple-primary);
            color: #FFFFFF;
            box-shadow: 0 4px 14px rgba(124, 58, 237, 0.25);
        }

        .btn-primary:hover {
            background: var(--purple-dark);
            box-shadow: 0 6px 20px rgba(124, 58, 237, 0.35);
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .nav { display: none; }
        }

        /* ========================================
           MAIN CONTENT
           ======================================== */

        .main-content {
            padding-top: 8rem;
            padding-bottom: 4rem;
            min-height: 100vh;
        }

        .page-header {
            text-align: center;
            margin-bottom: 4rem;
        }

        .page-title {
            margin-bottom: 1rem;
        }

        .page-subtitle {
            font-size: 1.125rem;
            color: var(--text-tertiary);
        }

        .content-card {
            background: var(--bg-primary);
            border: 2px solid var(--border-default);
            border-left: 4px solid var(--purple-primary);
            border-radius: 1.5rem;
            padding: 3rem;
            margin-bottom: 2rem;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
        }

        @media (max-width: 768px) {
            .content-card {
                padding: 2rem 1.5rem;
            }
        }

        .section-heading {
            color: var(--text-primary);
            font-size: 1.5rem;
            font-weight: 700;
            margin-top: 2rem;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .section-number {
            width: 32px;
            height: 32px;
            background: var(--purple-ultra-light);
            color: var(--purple-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .section-content {
            margin-bottom: 2rem;
        }

        .section-content p {
            margin-bottom: 1rem;
            line-height: 1.7;
        }

        .section-content ul {
            list-style: none;
            padding-left: 0;
            margin-bottom: 1rem;
        }

        .section-content ul li {
            padding-left: 1.5rem;
            margin-bottom: 0.75rem;
            position: relative;
            line-height: 1.7;
        }

        .section-content ul li:before {
            content: "•";
            color: var(--purple-primary);
            font-weight: 700;
            font-size: 1.25rem;
            position: absolute;
            left: 0;
        }

        .highlight-box {
            background: var(--purple-ultra-light);
            border: 1px solid rgba(124, 58, 237, 0.2);
            border-radius: 0.75rem;
            padding: 1.25rem;
            margin: 1.5rem 0;
        }

        .highlight-box p {
            color: var(--text-secondary);
            margin: 0;
        }

        .highlight-box strong {
            color: var(--purple-primary);
        }

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

        .footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-subtle);
            padding: 4rem 0 2rem;
        }

        .footer-content {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 3rem;
            margin-bottom: 3rem;
        }

        @media (max-width: 968px) {
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
        }

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

        .footer-brand p {
            color: var(--text-tertiary);
            margin-top: 1rem;
        }

        .footer-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 0.75rem;
        }

        .footer-links a {
            color: var(--text-tertiary);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .footer-links a:hover {
            color: var(--purple-primary);
        }

        .footer-bottom {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid var(--border-subtle);
            color: var(--text-tertiary);
        }

        .mb-2 { margin-bottom: 1rem; }