:root {
            --bg-main: #FFFFFF; --bg-soft: #F7F8FA; --bg-dark: #0A0F19;
            --bg-dark-panel: #111827; --text-primary: #121826; --text-secondary: #4B5563;
            --text-light: #F9FAFB; --text-light-secondary: #A6B0C3; --accent-blue: #3B82F6;
            --border-color: #E5E7EB; --border-dark: #374151;
            --shadow-light: 0 4px 12px -2px rgba(18, 24, 38, 0.05);
            --shadow-hover: 0 20px 40px -10px rgba(18, 24, 38, 0.15);
            --font-sans: 'Alliance No.1', sans-serif; --font-mono: 'Source Code Pro', monospace;
            --header-height: 80px; --container-width: 1800px; --radius-sm: 8px; --radius-lg: 16px;
            --transition: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
        }
        *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans); background-color: var(--bg-main); color: var(--text-primary);
            line-height: 1.7; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        body.menu-open { overflow: hidden; }
        .container { max-width: var(--container-width); margin: 0 auto; padding: 0 2rem; }
        .eyebrow { 
            font-family: var(--font-mono); font-size: 0.9rem; color: var(--accent-blue); 
            font-weight: 700; margin-bottom: 1rem; display: block; 
            text-transform: uppercase; letter-spacing: 0.05em;
        }
        .title { 
            font-size: clamp(2.8rem, 5vw, 4.5rem); font-weight: 800; 
            letter-spacing: -0.04em; line-height: 1.1; margin-bottom: 1.5rem; 
        }
        .subtitle { 
            font-size: 1.25rem; color: var(--text-secondary); 
            max-width: 70ch; line-height: 1.7; 
        }
        .text-center { text-align: center; }
        .text-center .subtitle { margin-left: auto; margin-right: auto; }


        .header {
            position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
            height: var(--header-height);
            background-color: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            transition: background-color 0.3s ease, border-color 0.3s ease;
        }
        .navbar { display: flex; justify-content: space-between; align-items: center; height: 100%; }
        .nav-logo a { text-decoration: none; }
        .nav-logo-text { font-weight: 800; font-size: 1.5rem; color: var(--text-primary); }
        .nav-controls { display: flex; align-items: center; gap: 1rem; }
        .nav-btn {
            padding: 0.6rem 1.5rem; font-weight: 600; text-decoration: none;
            border-radius: var(--radius-sm); transition: var(--transition);
            border: 1px solid var(--text-primary); color: var(--text-primary);
            background-color: transparent;
        }
        .nav-btn:hover { background-color: var(--text-primary); color: var(--text-light); }
        .nav-icon-btn {
            background: none; border: none; cursor: pointer; font-size: 1.2rem;
            width: 40px; height: 40px; display: flex; align-items: center;
            justify-content: center; border-radius: 50%; color: var(--text-primary);
            transition: background-color 0.3s ease, color 0.3s ease;
        }
        .nav-icon-btn:hover { background-color: rgba(0, 0, 0, 0.05); }
        .nav-toggle .fa-xmark { display: none; }
        .menu-open .header .nav-toggle .fa-bars { display: none; }
        .menu-open .header .nav-toggle .fa-xmark { display: block; }
        .menu-open .header { background-color: transparent; border-bottom-color: transparent; }
        .menu-open .header .nav-logo-text, .menu-open .header .nav-icon-btn, .menu-open .header .nav-btn {
            color: var(--text-light); border-color: var(--text-light);
        }
        .fullscreen-menu {
            position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
            background-color: var(--bg-dark); z-index: 999;
            opacity: 0; visibility: hidden; pointer-events: none;
            transition: opacity 0.3s ease, visibility 0.3s ease;
            overflow-y: auto; padding: calc(var(--header-height) + 4rem) 2rem 4rem 2rem;
        }
        .fullscreen-menu.is-active { opacity: 1; visibility: visible; pointer-events: all; }
        .fullscreen-menu-grid {
            max-width: var(--container-width); margin: 0 auto; display: grid;
            grid-template-columns: repeat(12, 1fr); gap: 2rem;
        }
        .fullscreen-menu-col.main-nav { grid-column: span 4; }
        .fullscreen-menu-col.sub-nav { grid-column: span 2; }
        .fullscreen-menu-col h5 {
            font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.05em;
            color: var(--text-light-secondary); margin-bottom: 1.5rem; font-size: 0.8rem;
        }
        .fullscreen-menu-col ul { list-style: none; padding: 0; }
        .fullscreen-menu-col ul li a {
            display: block; text-decoration: none;
            color: var(--text-light); transition: color 0.3s ease, padding-left 0.3s ease;
        }
        .fullscreen-menu-col ul li a:hover { color: var(--accent-blue); padding-left: 0.5rem; }
        .fullscreen-menu-col.main-nav ul li { margin-bottom: 1rem; }
        .fullscreen-menu-col.main-nav ul li a { font-size: 2.5rem; font-weight: 700; letter-spacing: -0.03em; }
        .fullscreen-menu-col.sub-nav ul li { margin-bottom: 0.8rem; }
        .fullscreen-menu-col.sub-nav ul li a { font-size: 1rem; font-weight: 500; color: var(--text-light-secondary); }
        .fullscreen-menu-col.sub-nav ul li a:hover { color: var(--text-light); }
        .fullscreen-menu-col.sub-nav ul li a.active-link { color: var(--accent-blue); font-weight: 700; }


        .page-hero {
            padding: calc(var(--header-height) + 100px) 0 100px 0;
            background-color: var(--bg-soft);
            border-bottom: 1px solid var(--border-color);
        }
        
        .briefing-section { padding: 100px 0; }
        .briefing-container { max-width: 1600px; margin: 0 auto; padding: 0 2rem; }
        
        .briefing-filters {
            display: flex; justify-content: center; gap: 1rem;
            margin-bottom: 5rem; flex-wrap: wrap;
        }
        .filter-btn {
            background-color: var(--bg-main); border: 1px solid var(--border-color);
            color: var(--text-secondary); padding: 0.75rem 1.75rem;
            font-size: 1rem; font-weight: 600;
            cursor: pointer; transition: var(--transition);
            border-radius: 50px;
        }
        .filter-btn:hover { 
            border-color: var(--accent-blue);
            color: var(--accent-blue);
            transform: translateY(-3px);
        }
        .filter-btn.active {
            background-color: var(--accent-blue);
            color: var(--text-light);
            border-color: var(--accent-blue);
            box-shadow: 0 5px 15px -5px rgba(59, 130, 246, 0.4);
        }

        .briefing-content-wrapper {
            min-height: 600px;
        }

        
        .featured-briefing {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 4rem;
            align-items: center;
            margin-bottom: 5rem;
            text-decoration: none;
            color: var(--text-primary);
            opacity: 0; 
        }
        .featured-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-light);
            transition: var(--transition);
        }
        .featured-briefing:hover .featured-image {
            transform: scale(1.02);
            box-shadow: var(--shadow-hover);
        }
        .featured-image img {
            width: 100%;
            display: block;
            aspect-ratio: 16/10;
            object-fit: cover;
        }
        .featured-content .pr-card-meta {
            font-family: var(--font-mono);
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }
        .featured-content .pr-card-title {
            font-size: clamp(2rem, 3vw, 2.8rem);
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.03em;
            margin-bottom: 1.5rem;
        }
        .featured-content .pr-card-summary {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 2rem;
        }
        .featured-content .pr-card-action {
            display: inline-flex; align-items: center;
            color: var(--accent-blue);
            font-weight: 700;
            font-size: 1.1rem;
        }
        .featured-content .pr-card-action i {
            margin-left: 0.75rem;
            transition: transform 0.3s ease;
        }
        .featured-briefing:hover .pr-card-action i {
            transform: translateX(6px);
        }

       
        .briefing-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 2.5rem;
        }
        .briefing-card {
            background-color: var(--bg-main);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            text-decoration: none;
            color: var(--text-primary);
            display: flex;
            flex-direction: column;
            transition: var(--transition);
            box-shadow: var(--shadow-light);
            opacity: 0; 
            transform: translateY(30px); 
        }
        .briefing-card:hover {
            transform: translateY(-8px) !important;
            box-shadow: var(--shadow-hover);
            border-color: var(--accent-blue);
        }
        .pr-card-image {
            width: 100%;
            padding-top: 56.25%; 
            position: relative;
            overflow: hidden;
            border-top-left-radius: var(--radius-lg);
            border-top-right-radius: var(--radius-lg);
        }
        .pr-card-image img {
            position: absolute;
            top: 0; left: 0; width: 100%; height: 100%;
            object-fit: cover;
            transition: transform 0.6s var(--transition);
        }
        .briefing-card:hover .pr-card-image img { transform: scale(1.05); }
        .pr-card-content { padding: 1.5rem; display: flex; flex-direction: column; flex-grow: 1; }
        .pr-card-meta {
            font-family: var(--font-mono); font-size: 0.8rem;
            color: var(--text-secondary); margin-bottom: 0.75rem;
        }
        .pr-card-title {
            font-size: 1.25rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: auto; 
            padding-bottom: 1.5rem;
            flex-grow: 1;
        }
        .pr-card-action {
            display: flex; align-items: center;
            color: var(--accent-blue);
            font-weight: 600;
            align-self: flex-start;
        }
        .pr-card-action i {
            margin-left: 0.5rem;
            transition: transform 0.3s ease;
        }
        .briefing-card:hover .pr-card-action i { transform: translateX(5px); }
        
        #no-results {
            text-align: center; padding: 4rem 2rem; color: var(--text-secondary);
            display: none; grid-column: 1 / -1;
            opacity: 0;
        }
        #no-results i { font-size: 3rem; margin-bottom: 1rem; color: #d1d5db; }


        .footer { 
            background-color: var(--bg-dark); border-top: 1px solid var(--border-dark); 
            padding: 80px 0; font-size: 0.95rem; 
        }
        .footer .container { color: var(--text-light-secondary); }
        .footer-grid { 
            display: grid; grid-template-columns: 2fr repeat(4, 1fr); 
            gap: 2rem; padding-bottom: 3rem; 
        }
        .footer-about h4 { font-size: 1.5rem; color: var(--text-light); margin-bottom: 1rem; }
        .footer-about p { color: var(--text-light-secondary); }
        .footer-col h5 { 
            font-family: var(--font-mono); text-transform: uppercase; 
            letter-spacing: 0.05em; color: var(--text-light); margin-bottom: 1.5rem; 
        }
        .footer-col ul { list-style: none; padding: 0; }
        .footer-col ul li { margin-bottom: 1rem; }
        .footer-col ul a { color: var(--text-light-secondary); text-decoration: none; transition: 0.3s ease; }
        .footer-col ul a:hover { color: var(--text-light); }
        .footer-bottom { 
            padding-top: 2rem; border-top: 1px solid var(--border-dark); 
            display: flex; justify-content: space-between; align-items: center; 
            flex-wrap: wrap; gap: 1rem;
        }
        .social-links { display: flex; gap: 1.5rem; }
        .social-links a { color: var(--text-light-secondary); font-size: 1.2rem; transition: 0.3s ease; }
        .social-links a:hover { color: var(--text-light); transform: translateY(-2px); }


        @media (max-width: 992px) {
            .featured-briefing { grid-template-columns: 1fr; gap: 2rem; }
            .featured-image { order: -1; } 
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .footer-about { grid-column: 1 / -1; margin-bottom: 2rem; }
            .fullscreen-menu-grid { grid-template-columns: 1fr; gap: 3rem; }
            .fullscreen-menu-col, .fullscreen-menu-col.main-nav, .fullscreen-menu-col.sub-nav { grid-column: span 1; }
            .fullscreen-menu-col.main-nav ul li a { font-size: 2rem; }
        }
        @media (max-width: 768px) {
            .nav-btn { display: none; }
            .briefing-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; gap: 1.5rem; text-align: center; }
        }