/* --- TACTICAL HUD STYLE CONFIGURATION --- */
:root {
    --bg-deep: #050607;       /* Самый темный фон */
    --bg-slate: #0f1215;      /* Фон панелей */
    --bg-panel: rgba(20, 24, 28, 0.95); /* Полупрозрачные блоки */
    
    --hud-orange: #ff9d00;    /* Основной акцент (Amber/Orange) */
    --hud-orange-dim: rgba(255, 157, 0, 0.3); /* Тусклый оранжевый для рамок */
    --hud-text: #c0c5ce;      /* Основной текст (серый) */
    --hud-alert: #ff3333;     /* Красный (Оффлайн) */
    --hud-success: #33ff00;   /* Зеленый (Онлайн) */
    
    --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace; /* Шрифт терминала */
}

* { box-sizing: border-box; }

body {
    margin: 0; padding: 0;
    background-color: var(--bg-deep);
    color: var(--hud-text);
    font-family: var(--font-mono);
    font-size: 14px;
    line-height: 1.6;
    /* Тактическая сетка на фоне */
    background-image: 
        linear-gradient(var(--bg-slate) 1px, transparent 1px),
        linear-gradient(90deg, var(--bg-slate) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: center top;
}

/* Эффект ЭЛТ-монитора (Scanlines) */
.hud-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 9999;
    background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
    background-size: 100% 2px, 3px 100%;
    box-shadow: inset 0 0 100px rgba(0,0,0,0.9);
}

.container { max-width: 1400px; margin: 0 auto; padding: 20px; position: relative; z-index: 2; }
a { text-decoration: none; color: var(--hud-orange); transition: 0.2s; }
a:hover { color: #fff; text-shadow: 0 0 5px var(--hud-orange); }

/* --- HEADER / TOP BAR --- */
.top-bar {
    display: flex; justify-content: space-between; align-items: center;
    border-bottom: 2px solid var(--hud-orange);
    background: var(--bg-slate);
    padding: 15px 20px;
    margin-bottom: 40px;
    position: relative;
}
/* Декоративный текст над шапкой */
.top-bar::before {
    content: "SYS.VER.3.0.1 // SECURE_UPLINK_ESTABLISHED";
    position: absolute; top: -18px; right: 0;
    font-size: 10px; color: var(--hud-orange); letter-spacing: 2px;
}

.brand {
    font-size: 24px; font-weight: bold; letter-spacing: 4px;
    color: #fff; text-transform: uppercase;
    border: 1px solid var(--hud-orange); padding: 5px 15px;
    background: rgba(255, 157, 0, 0.1);
}

.nav-links { display: flex; gap: 5px; flex-wrap: wrap; }
.nav-btn {
    display: block; padding: 8px 20px;
    background: var(--bg-deep);
    border: 1px solid var(--hud-orange-dim);
    color: var(--hud-text);
    text-transform: uppercase; letter-spacing: 2px;
    font-size: 12px; font-weight: bold;
    position: relative; transition: 0.3s;
}
.nav-btn:hover, .nav-btn.active {
    background: var(--hud-orange); color: #000;
    border-color: var(--hud-orange);
    box-shadow: 0 0 15px rgba(255, 157, 0, 0.3);
}

/* --- GRID LAYOUT (SIDEBAR + CONTENT) --- */
.grid-layout {
    display: grid; grid-template-columns: 260px 1fr; gap: 30px;
    min-height: 60vh;
}

/* Sidebar Styling */
.sidebar {
    border-right: 1px solid var(--hud-orange-dim);
    padding-right: 20px; text-align: right;
}
.sidebar-item { margin-bottom: 25px; }
.sidebar-label { 
    font-size: 10px; color: var(--hud-orange); 
    letter-spacing: 1px; display: block; margin-bottom: 5px; 
}
.sidebar-val { font-size: 16px; color: #fff; text-shadow: 0 0 5px rgba(255,255,255,0.3); }

/* --- HUD PANELS (BOXES) --- */
.hud-panel {
    background: var(--bg-panel);
    border: 1px solid var(--hud-orange-dim);
    padding: 30px; margin-bottom: 30px;
    position: relative;
}
/* Уголки (Corner Brackets) через градиенты */
.hud-panel::before {
    content: ""; position: absolute; top: -1px; left: -1px; right: -1px; bottom: -1px;
    background: 
        linear-gradient(to right, var(--hud-orange) 2px, transparent 2px) 0 0,
        linear-gradient(to bottom, var(--hud-orange) 2px, transparent 2px) 0 0,
        linear-gradient(to left, var(--hud-orange) 2px, transparent 2px) 100% 0,
        linear-gradient(to bottom, var(--hud-orange) 2px, transparent 2px) 100% 0,
        linear-gradient(to left, var(--hud-orange) 2px, transparent 2px) 100% 100%,
        linear-gradient(to top, var(--hud-orange) 2px, transparent 2px) 100% 100%,
        linear-gradient(to right, var(--hud-orange) 2px, transparent 2px) 0 100%,
        linear-gradient(to top, var(--hud-orange) 2px, transparent 2px) 0 100%;
    background-repeat: no-repeat;
    background-size: 10px 10px;
    pointer-events: none;
}

.panel-header {
    border-bottom: 1px solid var(--hud-orange-dim);
    padding-bottom: 10px; margin-bottom: 20px;
    display: flex; justify-content: space-between; align-items: flex-end;
}
.panel-title { color: var(--hud-orange); font-size: 1.1rem; text-transform: uppercase; letter-spacing: 2px; margin: 0; }
.panel-id { font-size: 10px; color: #555; }

/* TYPOGRAPHY */
h1 { font-size: 2.5rem; text-transform: uppercase; color: #fff; margin: 0 0 15px 0; letter-spacing: -1px; }
h2 { color: #fff; border-left: 3px solid var(--hud-orange); padding-left: 15px; margin-top: 30px; }
p { margin-bottom: 20px; color: #aab; text-align: justify; }

/* ACTION BUTTONS */
.btn-action {
    display: inline-block; background: transparent;
    border: 1px solid var(--hud-orange); color: var(--hud-orange);
    padding: 15px 30px; text-transform: uppercase; font-weight: bold;
    cursor: pointer; transition: 0.2s; text-align: center;
    box-shadow: inset 0 0 10px rgba(255, 157, 0, 0.1); margin-right: 10px;
}
.btn-action:hover {
    background: var(--hud-orange); color: #000;
    box-shadow: 0 0 20px var(--hud-orange);
}

/* TABLES */
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; margin-top: 20px; }
.data-table th { text-align: left; padding: 12px; color: var(--hud-orange); border-bottom: 1px solid var(--hud-orange); }
.data-table td { padding: 12px; border-bottom: 1px solid #333; color: #ccc; }
.data-table tr:hover td { background: rgba(255, 157, 0, 0.05); color: #fff; }

.status-dot { display: inline-block; width: 8px; height: 8px; margin-right: 5px; border-radius: 50%; }
.status-dot.online { background: var(--hud-success); box-shadow: 0 0 5px var(--hud-success); }
.status-dot.offline { background: var(--hud-alert); box-shadow: 0 0 5px var(--hud-alert); }

/* FOOTER */
footer {
    border-top: 1px solid #333; padding: 30px 0; margin-top: 60px;
    text-align: center; color: #555; font-size: 10px; letter-spacing: 2px;
}

/* RESPONSIVE */
@media(max-width: 900px) {
    .grid-layout { grid-template-columns: 1fr; }
    .sidebar { 
        border-right: none; border-bottom: 1px solid #333; 
        padding-bottom: 20px; margin-bottom: 20px; 
        text-align: left; display: grid; grid-template-columns: 1fr 1fr; 
    }
    .top-bar { flex-direction: column; align-items: flex-start; gap: 20px; }
    .nav-links { width: 100%; justify-content: space-between; }
    .nav-btn { flex-grow: 1; text-align: center; }
}