:root {
    /* --- ПЕРЕМЕННЫЕ ТЕМЫ --- */
    --bg-wallpaper: linear-gradient(135deg, #1e1e2e 0%, #2a2a3a 100%);
    --window-bg: rgba(30, 30, 35, 0.85);
    --window-border: rgba(255, 255, 255, 0.1);
    --text-main: #ffffff;
    --text-muted: #888888;
    --accent-color: #3b82f6;
    --radius: 8px;
    --taskbar-bg: rgba(20, 20, 25, 0.8);
    
    /* --- АНИМАЦИИ --- */
    --anim-speed: 0.2s;
}

* { box-sizing: border-box; user-select: none; }
body, html { margin: 0; padding: 0; width: 100%; height: 100%; overflow: hidden; font-family: 'Segoe UI', sans-serif; }

/* Обои */
#wallpaper {
    position: absolute; inset: 0; background: var(--bg-wallpaper);
    background-size: cover; background-position: center; z-index: -1;
}

/* Boot Screen */
#boot-screen {
    position: fixed; inset: 0; background: #000; z-index: 9999;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    color: var(--text-main); transition: opacity 0.5s ease;
}
#boot-logo { font-size: 40px; font-weight: bold; margin-bottom: 20px; color: var(--accent-color); }
.loader-track { width: 300px; height: 4px; background: #333; border-radius: 2px; overflow: hidden; }
#boot-bar { width: 0%; height: 100%; background: var(--accent-color); transition: width 0.1s linear; }
#boot-text { margin-top: 15px; font-size: 12px; color: var(--text-muted); }

/* Taskbar */
#taskbar {
    position: absolute; bottom: 0; left: 0; width: 100%; height: 48px;
    background: var(--taskbar-bg); backdrop-filter: blur(10px);
    display: flex; align-items: center; padding: 0 15px; gap: 15px; z-index: 1000;
    border-top: 1px solid var(--window-border);
}
.taskbar-btn {
    background: none; border: none; color: var(--text-main); font-size: 20px;
    padding: 8px; border-radius: 4px; cursor: pointer; transition: background 0.2s;
}
.taskbar-btn:hover { background: rgba(255,255,255,0.1); color: var(--accent-color); }

/* Окна */
.window {
    position: absolute; background: var(--window-bg);
    backdrop-filter: blur(15px); -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--window-border); border-radius: var(--radius);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    display: flex; flex-direction: column; overflow: hidden;
    opacity: 0; transform: scale(0.98); pointer-events: none;
    transition: opacity var(--anim-speed), transform var(--anim-speed);
}
.window.active { opacity: 1; transform: scale(1); pointer-events: all; }

/* Заголовок окна */
.window-header {
    height: 32px; background: rgba(255,255,255,0.05); border-bottom: 1px solid var(--window-border);
    display: flex; justify-content: space-between; align-items: center; padding: 0 10px; cursor: default;
}
.window-title { font-size: 12px; font-weight: 500; }
.window-controls button { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 4px; }
.window-controls button:hover { color: #fff; }
.window-controls button.close:hover { color: #ff4444; }

.window-content { flex: 1; overflow: auto; padding: 15px; color: var(--text-main); }

/* Настройки (Специфичные стили) */
.settings-grid { display: grid; grid-template-columns: 200px 1fr; gap: 20px; height: 100%; }
.settings-nav { border-right: 1px solid var(--window-border); padding-right: 15px; }
.nav-item { padding: 10px; cursor: pointer; border-radius: 4px; font-size: 13px; color: var(--text-muted); }
.nav-item:hover, .nav-item.active { background: rgba(255,255,255,0.05); color: var(--accent-color); }
.settings-panel h2 { margin-top: 0; font-size: 18px; border-bottom: 1px solid var(--window-border); padding-bottom: 10px; }
.control-group { margin-bottom: 20px; }
.control-group label { display: block; margin-bottom: 8px; font-size: 12px; color: var(--text-muted); }
input[type="color"] { border: none; width: 40px; height: 40px; cursor: pointer; background: none; }
input[type="text"] { background: rgba(0,0,0,0.2); border: 1px solid var(--window-border); color: #fff; padding: 8px; border-radius: 4px; width: 100%; }
.btn-apply { background: var(--accent-color); color: #fff; border: none; padding: 8px 15px; border-radius: 4px; cursor: pointer; margin-top: 10px; }

/* Меню Пуск */
.start-menu { width: 250px; display: flex; flex-direction: column; gap: 5px; }
.start-item { padding: 12px; cursor: pointer; border-radius: 4px; display: flex; align-items: center; gap: 10px; font-size: 13px; }
.start-item:hover { background: rgba(255,255,255,0.1); }
.start-item i { width: 20px; text-align: center; color: var(--accent-color); }