:root {
    /* Dark Theme Palette (DEFAULT) */
    --bg-deep: #0f172a;
    --panel-bg: #1e293b;
    --nav-bg: rgba(15, 23, 42, 0.95);
    --accent-green: #10b981; 
    --text-main: #f8fafc;
    --text-dim: #94a3b8;
    --code-font: 'JetBrains Mono', monospace;
    --border-color: rgba(255, 255, 255, 0.1);
    --highlight-bg: rgba(16, 185, 129, 0.1);
    --logo-filter: none; 
    --input-focus-bg: rgba(255, 255, 255, 0.05);
    
    /* Syntax Highlighting Colors */
    --code-pink: #d53f8c;
    --code-yellow: #d97706;
    --code-blue: #0284c7;
    --code-purple: #8b5cf6;
}

/* Light Theme Overrides */
body.light-theme {
    --bg-deep: #f4f7f6;
    --panel-bg: #ffffff;
    --nav-bg: rgba(244, 247, 246, 0.95);
    --accent-green: #059669;
    --text-main: #0f172a;
    --text-dim: #475569;
    --border-color: rgba(15, 23, 42, 0.1);
    --highlight-bg: rgba(5, 150, 105, 0.05);
    --logo-filter: invert(1) hue-rotate(180deg);
    --input-focus-bg: #f8fafc;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 90px;
}

body, html {
    margin: 0; padding: 0;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-deep);
    color: var(--text-main);
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

body::before {
    content: ""; position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background-image: linear-gradient(var(--border-color) 1px, transparent 1px), linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
    background-size: 50px 50px; z-index: -1;
    mask-image: radial-gradient(circle at center, black, transparent 80%);
    -webkit-mask-image: radial-gradient(circle at center, black, transparent 80%);
    transition: background-image 0.3s ease;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 5%; }

/* --- Navigation --- */
nav { 
    position: fixed; top: 0; left: 0; width: 100%; box-sizing: border-box;
    border-bottom: 1px solid var(--border-color); background: var(--nav-bg); 
    backdrop-filter: blur(10px); z-index: 1000; transition: background-color 0.3s ease, border-color 0.3s ease;
}
.nav-inner { display: flex; justify-content: space-between; align-items: center; height: 70px; font-family: var(--code-font); font-size: 0.8rem; font-weight: bold; }
.logo-wrap { display: flex; align-items: center; }
.logo-wrap img { filter: var(--logo-filter); transition: filter 0.3s ease; }
.status-indicator { display: inline-block; width: 8px; height: 8px; background: var(--accent-green); border-radius: 50%; margin-left: 8px; box-shadow: 0 0 8px rgba(16, 185, 129, 0.5); }

.nav-links { display: flex; align-items: center; }
.nav-links a { color: var(--text-dim); text-decoration: none; margin-left: 25px; transition: 0.3s; }
.nav-links a:hover, .nav-links a.active { color: var(--accent-green); }

/* Theme Toggle Switch */
.theme-toggle {
    background: transparent; border: 1px solid var(--border-color); color: var(--text-main);
    font-family: var(--code-font); font-size: 0.75rem; font-weight: bold;
    padding: 6px 10px; margin-left: 25px; cursor: pointer; transition: all 0.3s ease;
}
.theme-toggle:hover { border-color: var(--accent-green); color: var(--accent-green); }

.hamburger { display: none; flex-direction: column; cursor: pointer; gap: 5px; z-index: 1001; }
.hamburger span { width: 25px; height: 2px; background-color: var(--text-main); transition: all 0.3s ease; }

/* --- Hero / Header --- */
.hero { padding: 140px 0 60px; }
.breadcrumbs { font-family: var(--code-font); font-size: 0.85rem; margin-bottom: 20px; color: var(--text-dim); }
.breadcrumbs span { letter-spacing: 1px; }
.breadcrumbs .current { color: var(--accent-green); font-weight: bold; }

.hero-content h1 { font-size: clamp(2rem, 4vw, 3.5rem); font-weight: 900; line-height: 1; margin: 0 0 20px 0; letter-spacing: -1.5px; text-transform: uppercase; color: var(--text-main); transition: color 0.3s ease; }
.hero-content p { font-size: 1.1rem; color: var(--text-dim); max-width: 600px; line-height: 1.6; margin-bottom: 40px; }

/* Index-specific hero */
.hero.index-hero { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: center; padding: 120px 0 80px; }
.hero.index-hero h1 { font-size: clamp(2.5rem, 5vw, 4rem); line-height: 0.9; letter-spacing: -2px; }
.sys-log { font-family: var(--code-font); color: var(--accent-green); font-size: 0.9rem; margin-bottom: 20px; display: block; font-weight: bold; }
.hero-visual { background: var(--panel-bg); border: 1px solid var(--border-color); padding: 20px; border-radius: 8px; box-shadow: 0 20px 40px rgba(0,0,0,0.05); width: 100%; max-width: 550px; box-sizing: border-box; transition: background-color 0.3s ease, border-color 0.3s ease; }
.code-window { font-family: var(--code-font); font-size: 0.8rem; color: var(--text-main); line-height: 1.5; overflow-x: auto; transition: color 0.3s ease; }

/* --- Stats Bar --- */
.stats-bar {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
    background: var(--panel-bg); border: 1px solid var(--accent-green);
    padding: 30px; box-shadow: 0 10px 30px rgba(5, 150, 105, 0.05); margin-bottom: 80px;
    transition: background-color 0.3s ease;
}
.stat-item { text-align: center; font-family: var(--code-font); }
.stat-value { font-size: 2.5rem; color: var(--accent-green); font-weight: bold; margin-bottom: 5px; letter-spacing: -1px; }
.stat-label { font-size: 0.8rem; color: var(--text-main); font-weight: bold; }
.stat-sub { font-size: 0.7rem; color: var(--text-dim); display: block; margin-top: 5px; }

/* --- Architecture Grid & Products --- */
.section-label { font-family: var(--code-font); color: var(--accent-green); font-size: 1.2rem; letter-spacing: 1px; margin-bottom: 40px; padding-bottom: 10px; border-bottom: 2px solid var(--border-color); display: block; text-transform: uppercase; font-weight: 900; }
.grid-system { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 100px; }
.module-card { height: 100%; background: var(--panel-bg); border: 1px solid var(--border-color); transition: all 0.3s ease; display: flex; flex-direction: column; box-shadow: 0 4px 6px rgba(0,0,0,0.02); }
.module-card:hover { border-color: var(--accent-green); transform: translateY(-5px); box-shadow: 0 10px 20px rgba(5, 150, 105, 0.1); }

.arch-icon { width: 100%; height: 160px; background: var(--highlight-bg); display: flex; align-items: center; justify-content: center; border-bottom: 1px solid var(--border-color); color: var(--accent-green); }
.arch-icon svg { width: 60px; height: 60px; }

.product-link { text-decoration: none; color: inherit; display: block; }
.product-link:hover .module-card { background: var(--highlight-bg); }
.product-visual { width: 100%; height: 220px; background: var(--border-color); display: flex; align-items: center; justify-content: center; border-bottom: 1px solid var(--border-color); overflow: hidden; }
.product-visual img { width: 100%; height: 100%; object-fit: cover; transition: 0.3s; mix-blend-mode: normal; opacity: 0.8; }
body.light-theme .product-visual img { mix-blend-mode: multiply; opacity: 0.9; }
.product-link:hover .product-visual img { opacity: 1; transform: scale(1.05); }

.card-content { padding: 25px; flex-grow: 1; display: flex; flex-direction: column; }
.module-card h3 { font-family: var(--code-font); color: var(--text-main); margin: 0 0 15px 0; font-size: 1.1rem; text-transform: uppercase; }
.product-link .module-card h3 { color: var(--accent-green); font-size: 1.2rem; }
.module-card p { font-size: 0.9rem; color: var(--text-dim); line-height: 1.5; margin-bottom: 20px; }
.tech-specs { margin-top: auto; padding-top: 20px; border-top: 1px dashed var(--border-color); font-family: var(--code-font); font-size: 0.75rem; list-style: none; padding-left: 0; }
.tech-specs li { margin-bottom: 5px; color: var(--text-dim); }
.tech-specs li span { color: var(--text-main); font-weight: bold; }

/* --- API Terminal Sandbox --- */
.api-section { margin-bottom: 120px; }
.api-terminal { background: #0f172a; border-radius: 4px; border: 1px solid var(--border-color); overflow: hidden; box-shadow: 0 20px 50px rgba(0,0,0,0.15); }
.api-header { background: #1e293b; padding: 0 20px; display: flex; border-bottom: 1px solid #334155; font-family: var(--code-font); font-size: 0.85rem; overflow-x: auto; }
.api-tab { padding: 15px 20px; color: #64748b; cursor: pointer; transition: 0.2s; white-space: nowrap; border-bottom: 2px solid transparent; }
.api-tab:hover { color: #cbd5e1; }
.api-tab.active { color: var(--accent-green); border-bottom: 2px solid var(--accent-green); background: rgba(5, 150, 105, 0.05); }
.api-body { padding: 30px; font-family: var(--code-font); font-size: 0.85rem; color: #e2e8f0; line-height: 1.6; overflow-x: auto; min-height: 250px; }
.api-content { display: none; }
.api-content.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }

/* --- News Section --- */
.news-section { margin-bottom: 100px; }
.log-container { background: var(--panel-bg); border: 1px solid var(--border-color); font-family: var(--code-font); padding: 0; box-shadow: 0 4px 6px rgba(0,0,0,0.02); transition: all 0.3s ease; }
.log-link { text-decoration: none; display: block; color: inherit; }
.log-link:hover .log-entry { background: var(--highlight-bg); padding-left: 35px; cursor: pointer; }
.log-entry { display: grid; grid-template-columns: 150px 1fr 100px; padding: 15px 25px; border-bottom: 1px solid var(--border-color); font-size: 0.85rem; transition: all 0.2s ease; align-items: center; }
.log-date { color: var(--text-dim); }
.log-msg { color: var(--text-main); font-weight: 500; }
.log-tag { color: var(--accent-green); text-align: right; font-weight: bold; }

/* --- Team Grid --- */
.team-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; margin-bottom: 120px; }
.team-card { border: 1px solid var(--border-color); background: var(--panel-bg); padding: 25px; box-shadow: 0 4px 6px rgba(0,0,0,0.02); transition: 0.3s; }
.team-card:hover { border-color: var(--accent-green); background: var(--highlight-bg); transform: translateY(-3px); }
.team-icon { width: 28px; height: 28px; color: var(--accent-green); margin-bottom: 15px; display: block; }
.team-role { font-size: 0.7rem; color: var(--accent-green); font-family: var(--code-font); text-transform: uppercase; margin-bottom: 10px; display: block; font-weight: bold; }
.team-info h4 { margin: 0 0 10px 0; font-family: var(--code-font); color: var(--text-main); text-transform: uppercase; }
.team-specs { font-size: 0.75rem; color: var(--text-dim); line-height: 1.4; }

/* --- Action Banners & Buttons --- */
.action-banner { background: var(--highlight-bg); border: 1px solid var(--accent-green); padding: 40px; text-align: center; margin-bottom: 80px; }
.action-banner h2 { font-family: var(--code-font); color: var(--text-main); margin-top: 0; }
.action-btn { display: table; margin: 20px auto 0 auto; background: var(--accent-green); color: #fff; border: none; padding: 12px 25px; font-weight: bold; cursor: pointer; text-transform: uppercase; transition: 0.3s; font-family: var(--code-font); text-decoration: none; font-size: 0.85rem; }
.action-btn:hover { background: var(--text-main); box-shadow: 0 4px 15px rgba(5, 150, 105, 0.3); color: var(--panel-bg); }

/* --- Contact --- */
.uplink-container { background: var(--panel-bg); border: 1px solid var(--accent-green); padding: 30px; margin-bottom: 120px; font-family: var(--code-font); box-shadow: 0 10px 30px rgba(5, 150, 105, 0.05); transition: background-color 0.3s ease; }
.uplink-header { display: flex; justify-content: space-between; margin-bottom: 25px; color: var(--accent-green); font-size: 0.8rem; border-bottom: 1px solid rgba(16, 185, 129, 0.2); padding-bottom: 10px; font-weight: bold; flex-wrap: wrap; gap: 10px; }
.uplink-form { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.uplink-input { background: transparent; border: 1px solid var(--border-color); padding: 12px; color: var(--text-main); font-family: var(--code-font); outline: none; transition: 0.2s; box-sizing: border-box; width: 100%; }
.uplink-input::placeholder { color: var(--text-dim); }
.uplink-input:focus { border-color: var(--accent-green); background: var(--input-focus-bg); }
.full-width { grid-column: span 2; }
.uplink-btn { background: var(--accent-green); color: #fff; border: none; padding: 15px; font-weight: bold; cursor: pointer; text-transform: uppercase; transition: 0.3s; width: 100%; font-family: var(--code-font); }
.uplink-btn:hover { background: var(--text-main); color: var(--panel-bg); box-shadow: 0 4px 15px rgba(5, 150, 105, 0.3); }

/* --- Modal --- */
.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(15, 23, 42, 0.8); backdrop-filter: blur(5px); display: none; justify-content: center; align-items: center; z-index: 2000; padding: 20px; box-sizing: border-box; }
.terminal-box { width: 100%; max-width: 400px; background: var(--panel-bg); border: 1px solid var(--accent-green); padding: 20px; font-family: var(--code-font); box-shadow: 0 20px 50px rgba(0,0,0,0.2); box-sizing: border-box; }
.terminal-box input { background: transparent; border: none; border-bottom: 1px solid var(--border-color); color: var(--text-main); width: 100%; padding: 10px 0; margin-bottom: 20px; outline: none; box-sizing: border-box; }
.terminal-box input:focus { border-color: var(--accent-green); }

/* --- Footer --- */
footer { border-top: 1px solid var(--border-color); padding: 60px 0; font-family: var(--code-font); font-size: 0.8rem; background: var(--panel-bg); transition: background-color 0.3s ease, border-color 0.3s ease; }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; color: var(--text-dim); }

/* --- Responsive --- */
@media (max-width: 900px) {
    .hamburger { display: flex; }
    .nav-links { position: fixed; top: 70px; left: 100%; width: 100%; height: calc(100vh - 70px); background: var(--nav-bg); backdrop-filter: blur(10px); flex-direction: column; justify-content: flex-start; padding-top: 40px; transition: left 0.3s ease; }
    .nav-links.active { left: 0; }
    .nav-links a, .theme-toggle { margin: 15px 0; font-size: 1.2rem; margin-left: 0; }
    .hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); background-color: var(--accent-green); }
    .hamburger.active span:nth-child(2) { opacity: 0; }
    .hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); background-color: var(--accent-green); }
    
    .hero.index-hero { grid-template-columns: 1fr; padding: 120px 0 40px; text-align: center; } 
    .hero.index-hero p { margin: 0 auto; }
    .sys-log { margin-top: 20px; }
    
    .grid-system { grid-template-columns: 1fr; }
    .stats-bar { grid-template-columns: 1fr; gap: 40px; }
    .uplink-form { grid-template-columns: 1fr; }
    .full-width { grid-column: span 1; }
    .log-entry { grid-template-columns: 1fr auto; grid-template-areas: "date tag" "msg msg"; gap: 10px; }
    .log-msg { grid-area: msg; }
    .log-date { grid-area: date; }
    .log-tag { grid-area: tag; }
    .footer-inner { flex-direction: column; text-align: center; gap: 20px; align-items: center; }
    .footer-inner div { text-align: center !important; }
}
@media (max-width: 500px) {
    .hero {padding-top: 100px;}
    .container hero {width:90%; margin: 0 auto;} 
    .stats-bar {width:80%; margin: 0 auto;} 
    .hero-content h1 { font-size: 2.8rem; line-height: 50px; margin-bottom: 0px; }
    .hero-content, .breadcrumbs {width: 90%; margin: 0 auto; text-align: left;}
    .hero-visual {width: 90%; margin: 0 auto;text-align:left;}
    .api-tab { padding: 12px 15px; font-size: 0.75rem; }
    .api-body { padding: 15px; font-size: 0.75rem; }
    .uplink-header { flex-direction: column; align-items: flex-start; }
    .log-entry { grid-template-columns: 1fr; grid-template-areas: "date" "tag" "msg"; gap: 5px; }
    .log-tag { text-align: left; }
    .product-visual { height: 180px; }
}